From 9c659ffe685d5615b15c31cd86814e597cff7488 Mon Sep 17 00:00:00 2001 From: negativeExponent Date: Fri, 5 Jun 2020 19:56:44 +0800 Subject: libchdr: Update to latest upstream Update libchdr based from latest upstream sources. Fixes some issues as noted. - Latest upstream commit: https://github.com/rtissera/libchdr/tree/6117d59d00ef8620de4cff4d6ecae46368cae881 - Fix https://github.com/libretro/pcsx_rearmed/issues/301 - Specific commit that fixes above problem: https://github.com/rtissera/libchdr/commit/e1acac6d83b36531e543e39a9e1a363e681083e6 --- deps/libchdr/bitstream.c | 63 +-- deps/libchdr/bitstream.h | 85 ++-- deps/libchdr/cdrom.c | 829 ++++++++++++++++++------------------ deps/libchdr/cdrom.h | 216 +++++----- deps/libchdr/chd.c | 982 ++++++++++++++++++++++--------------------- deps/libchdr/chd.h | 44 +- deps/libchdr/coretypes.h | 18 +- deps/libchdr/flac.c | 662 ++++++++++++++--------------- deps/libchdr/flac.h | 101 ++--- deps/libchdr/huffman.c | 1042 +++++++++++++++++++++++----------------------- deps/libchdr/huffman.h | 176 ++++---- 11 files changed, 2118 insertions(+), 2100 deletions(-) diff --git a/deps/libchdr/bitstream.c b/deps/libchdr/bitstream.c index 735b97f..3f61c93 100644 --- a/deps/libchdr/bitstream.c +++ b/deps/libchdr/bitstream.c @@ -1,6 +1,6 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +*************************************************************************** bitstream.c @@ -11,15 +11,17 @@ #include "bitstream.h" #include -//************************************************************************** -// INLINE FUNCTIONS -//************************************************************************** +/*************************************************************************** + * INLINE FUNCTIONS + *************************************************************************** + */ int bitstream_overflow(struct bitstream* bitstream) { return ((bitstream->doffset - bitstream->bits / 8) > bitstream->dlength); } -//------------------------------------------------- -// create_bitstream - constructor -//------------------------------------------------- +/*------------------------------------------------- + * create_bitstream - constructor + *------------------------------------------------- + */ struct bitstream* create_bitstream(const void *src, uint32_t srclength) { @@ -33,17 +35,18 @@ struct bitstream* create_bitstream(const void *src, uint32_t srclength) } -//----------------------------------------------------- -// bitstream_peek - fetch the requested number of bits -// but don't advance the input pointer -//----------------------------------------------------- +/*----------------------------------------------------- + * bitstream_peek - fetch the requested number of bits + * but don't advance the input pointer + *----------------------------------------------------- + */ uint32_t bitstream_peek(struct bitstream* bitstream, int numbits) { if (numbits == 0) return 0; - // fetch data if we need more + /* fetch data if we need more */ if (numbits > bitstream->bits) { while (bitstream->bits <= 24) @@ -55,15 +58,16 @@ uint32_t bitstream_peek(struct bitstream* bitstream, int numbits) } } - // return the data + /* return the data */ return bitstream->buffer >> (32 - numbits); } -//----------------------------------------------------- -// bitstream_remove - advance the input pointer by the -// specified number of bits -//----------------------------------------------------- +/*----------------------------------------------------- + * bitstream_remove - advance the input pointer by the + * specified number of bits + *----------------------------------------------------- + */ void bitstream_remove(struct bitstream* bitstream, int numbits) { @@ -72,9 +76,10 @@ void bitstream_remove(struct bitstream* bitstream, int numbits) } -//----------------------------------------------------- -// bitstream_read - fetch the requested number of bits -//----------------------------------------------------- +/*----------------------------------------------------- + * bitstream_read - fetch the requested number of bits + *----------------------------------------------------- + */ uint32_t bitstream_read(struct bitstream* bitstream, int numbits) { @@ -84,9 +89,10 @@ uint32_t bitstream_read(struct bitstream* bitstream, int numbits) } -//------------------------------------------------- -// read_offset - return the current read offset -//------------------------------------------------- +/*------------------------------------------------- + * read_offset - return the current read offset + *------------------------------------------------- + */ uint32_t bitstream_read_offset(struct bitstream* bitstream) { @@ -101,9 +107,10 @@ uint32_t bitstream_read_offset(struct bitstream* bitstream) } -//------------------------------------------------- -// flush - flush to the nearest byte -//------------------------------------------------- +/*------------------------------------------------- + * flush - flush to the nearest byte + *------------------------------------------------- + */ uint32_t bitstream_flush(struct bitstream* bitstream) { diff --git a/deps/libchdr/bitstream.h b/deps/libchdr/bitstream.h index 9250d33..d376373 100644 --- a/deps/libchdr/bitstream.h +++ b/deps/libchdr/bitstream.h @@ -1,42 +1,43 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - bitstream.h - - Helper classes for reading/writing at the bit level. - -***************************************************************************/ - -#pragma once - -#ifndef __BITSTREAM_H__ -#define __BITSTREAM_H__ - -#include - -//************************************************************************** -// TYPE DEFINITIONS -//************************************************************************** - -// helper class for reading from a bit buffer -struct bitstream -{ - uint32_t buffer; // current bit accumulator - int bits; // number of bits in the accumulator - const uint8_t * read; // read pointer - uint32_t doffset; // byte offset within the data - uint32_t dlength; // length of the data -}; - -struct bitstream* create_bitstream(const void *src, uint32_t srclength); -int bitstream_overflow(struct bitstream* bitstream); -uint32_t bitstream_read_offset(struct bitstream* bitstream); - -uint32_t bitstream_read(struct bitstream* bitstream, int numbits); -uint32_t bitstream_peek(struct bitstream* bitstream, int numbits); -void bitstream_remove(struct bitstream* bitstream, int numbits); -uint32_t bitstream_flush(struct bitstream* bitstream); - - -#endif +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +*************************************************************************** + + bitstream.h + + Helper classes for reading/writing at the bit level. + +***************************************************************************/ + +#pragma once + +#ifndef __BITSTREAM_H__ +#define __BITSTREAM_H__ + +#include + +/*************************************************************************** + * TYPE DEFINITIONS + *************************************************************************** + */ + +/* helper class for reading from a bit buffer */ +struct bitstream +{ + uint32_t buffer; /* current bit accumulator */ + int bits; /* number of bits in the accumulator */ + const uint8_t * read; /* read pointer */ + uint32_t doffset; /* byte offset within the data */ + uint32_t dlength; /* length of the data */ +}; + +struct bitstream* create_bitstream(const void *src, uint32_t srclength); +int bitstream_overflow(struct bitstream* bitstream); +uint32_t bitstream_read_offset(struct bitstream* bitstream); + +uint32_t bitstream_read(struct bitstream* bitstream, int numbits); +uint32_t bitstream_peek(struct bitstream* bitstream, int numbits); +void bitstream_remove(struct bitstream* bitstream, int numbits); +uint32_t bitstream_flush(struct bitstream* bitstream); + + +#endif diff --git a/deps/libchdr/cdrom.c b/deps/libchdr/cdrom.c index 6c120cb..74a0786 100644 --- a/deps/libchdr/cdrom.c +++ b/deps/libchdr/cdrom.c @@ -1,417 +1,412 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - cdrom.c - - Generic MAME CD-ROM utilties - build IDE and SCSI CD-ROMs on top of this - -**************************************************************************** - - IMPORTANT: - "physical" block addresses are the actual addresses on the emulated CD. - "chd" block addresses are the block addresses in the CHD file. - Because we pad each track to a 4-frame boundary, these addressing - schemes will differ after track 1! - -***************************************************************************/ - -#include -#include - -#include "cdrom.h" - -/*************************************************************************** - DEBUGGING -***************************************************************************/ - -/** @brief The verbose. */ -#define VERBOSE (0) -#if VERBOSE - -/** - * @def LOG(x) do - * - * @brief A macro that defines log. - * - * @param x The void to process. - */ - -#define LOG(x) do { if (VERBOSE) logerror x; } while (0) - -/** - * @fn void CLIB_DECL logerror(const char *text, ...) ATTR_PRINTF(1,2); - * - * @brief Logerrors the given text. - * - * @param text The text. - * - * @return A CLIB_DECL. - */ - -void CLIB_DECL logerror(const char *text, ...) ATTR_PRINTF(1,2); -#else - -/** - * @def LOG(x); - * - * @brief A macro that defines log. - * - * @param x The void to process. - */ - -#define LOG(x) -#endif - - - -/*************************************************************************** - CONSTANTS -***************************************************************************/ - -/** @brief offset within sector. */ -#define SYNC_OFFSET 0x000 -/** @brief 12 bytes. */ -#define SYNC_NUM_BYTES 12 - -/** @brief offset within sector. */ -#define MODE_OFFSET 0x00f - -/** @brief offset within sector. */ -#define ECC_P_OFFSET 0x81c -/** @brief 2 lots of 86. */ -#define ECC_P_NUM_BYTES 86 -/** @brief 24 bytes each. */ -#define ECC_P_COMP 24 - -/** @brief The ECC q offset. */ -#define ECC_Q_OFFSET (ECC_P_OFFSET + 2 * ECC_P_NUM_BYTES) -/** @brief 2 lots of 52. */ -#define ECC_Q_NUM_BYTES 52 -/** @brief 43 bytes each. */ -#define ECC_Q_COMP 43 - - - -/** - * @brief ------------------------------------------------- - * ECC lookup tables pre-calculated tables for ECC data calcs - * -------------------------------------------------. - */ - -static const uint8_t ecclow[256] = -{ - 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, - 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, - 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, - 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e, - 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e, - 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe, - 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde, - 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe, - 0x1d, 0x1f, 0x19, 0x1b, 0x15, 0x17, 0x11, 0x13, 0x0d, 0x0f, 0x09, 0x0b, 0x05, 0x07, 0x01, 0x03, - 0x3d, 0x3f, 0x39, 0x3b, 0x35, 0x37, 0x31, 0x33, 0x2d, 0x2f, 0x29, 0x2b, 0x25, 0x27, 0x21, 0x23, - 0x5d, 0x5f, 0x59, 0x5b, 0x55, 0x57, 0x51, 0x53, 0x4d, 0x4f, 0x49, 0x4b, 0x45, 0x47, 0x41, 0x43, - 0x7d, 0x7f, 0x79, 0x7b, 0x75, 0x77, 0x71, 0x73, 0x6d, 0x6f, 0x69, 0x6b, 0x65, 0x67, 0x61, 0x63, - 0x9d, 0x9f, 0x99, 0x9b, 0x95, 0x97, 0x91, 0x93, 0x8d, 0x8f, 0x89, 0x8b, 0x85, 0x87, 0x81, 0x83, - 0xbd, 0xbf, 0xb9, 0xbb, 0xb5, 0xb7, 0xb1, 0xb3, 0xad, 0xaf, 0xa9, 0xab, 0xa5, 0xa7, 0xa1, 0xa3, - 0xdd, 0xdf, 0xd9, 0xdb, 0xd5, 0xd7, 0xd1, 0xd3, 0xcd, 0xcf, 0xc9, 0xcb, 0xc5, 0xc7, 0xc1, 0xc3, - 0xfd, 0xff, 0xf9, 0xfb, 0xf5, 0xf7, 0xf1, 0xf3, 0xed, 0xef, 0xe9, 0xeb, 0xe5, 0xe7, 0xe1, 0xe3 -}; - -/** @brief The ecchigh[ 256]. */ -static const uint8_t ecchigh[256] = -{ - 0x00, 0xf4, 0xf5, 0x01, 0xf7, 0x03, 0x02, 0xf6, 0xf3, 0x07, 0x06, 0xf2, 0x04, 0xf0, 0xf1, 0x05, - 0xfb, 0x0f, 0x0e, 0xfa, 0x0c, 0xf8, 0xf9, 0x0d, 0x08, 0xfc, 0xfd, 0x09, 0xff, 0x0b, 0x0a, 0xfe, - 0xeb, 0x1f, 0x1e, 0xea, 0x1c, 0xe8, 0xe9, 0x1d, 0x18, 0xec, 0xed, 0x19, 0xef, 0x1b, 0x1a, 0xee, - 0x10, 0xe4, 0xe5, 0x11, 0xe7, 0x13, 0x12, 0xe6, 0xe3, 0x17, 0x16, 0xe2, 0x14, 0xe0, 0xe1, 0x15, - 0xcb, 0x3f, 0x3e, 0xca, 0x3c, 0xc8, 0xc9, 0x3d, 0x38, 0xcc, 0xcd, 0x39, 0xcf, 0x3b, 0x3a, 0xce, - 0x30, 0xc4, 0xc5, 0x31, 0xc7, 0x33, 0x32, 0xc6, 0xc3, 0x37, 0x36, 0xc2, 0x34, 0xc0, 0xc1, 0x35, - 0x20, 0xd4, 0xd5, 0x21, 0xd7, 0x23, 0x22, 0xd6, 0xd3, 0x27, 0x26, 0xd2, 0x24, 0xd0, 0xd1, 0x25, - 0xdb, 0x2f, 0x2e, 0xda, 0x2c, 0xd8, 0xd9, 0x2d, 0x28, 0xdc, 0xdd, 0x29, 0xdf, 0x2b, 0x2a, 0xde, - 0x8b, 0x7f, 0x7e, 0x8a, 0x7c, 0x88, 0x89, 0x7d, 0x78, 0x8c, 0x8d, 0x79, 0x8f, 0x7b, 0x7a, 0x8e, - 0x70, 0x84, 0x85, 0x71, 0x87, 0x73, 0x72, 0x86, 0x83, 0x77, 0x76, 0x82, 0x74, 0x80, 0x81, 0x75, - 0x60, 0x94, 0x95, 0x61, 0x97, 0x63, 0x62, 0x96, 0x93, 0x67, 0x66, 0x92, 0x64, 0x90, 0x91, 0x65, - 0x9b, 0x6f, 0x6e, 0x9a, 0x6c, 0x98, 0x99, 0x6d, 0x68, 0x9c, 0x9d, 0x69, 0x9f, 0x6b, 0x6a, 0x9e, - 0x40, 0xb4, 0xb5, 0x41, 0xb7, 0x43, 0x42, 0xb6, 0xb3, 0x47, 0x46, 0xb2, 0x44, 0xb0, 0xb1, 0x45, - 0xbb, 0x4f, 0x4e, 0xba, 0x4c, 0xb8, 0xb9, 0x4d, 0x48, 0xbc, 0xbd, 0x49, 0xbf, 0x4b, 0x4a, 0xbe, - 0xab, 0x5f, 0x5e, 0xaa, 0x5c, 0xa8, 0xa9, 0x5d, 0x58, 0xac, 0xad, 0x59, 0xaf, 0x5b, 0x5a, 0xae, - 0x50, 0xa4, 0xa5, 0x51, 0xa7, 0x53, 0x52, 0xa6, 0xa3, 0x57, 0x56, 0xa2, 0x54, 0xa0, 0xa1, 0x55 -}; - -/** - * @brief ------------------------------------------------- - * poffsets - each row represents the addresses used to calculate a byte of the ECC P - * data 86 (*2) ECC P bytes, 24 values represented by each - * -------------------------------------------------. - */ - -static const uint16_t poffsets[ECC_P_NUM_BYTES][ECC_P_COMP] = -{ - { 0x000,0x056,0x0ac,0x102,0x158,0x1ae,0x204,0x25a,0x2b0,0x306,0x35c,0x3b2,0x408,0x45e,0x4b4,0x50a,0x560,0x5b6,0x60c,0x662,0x6b8,0x70e,0x764,0x7ba }, - { 0x001,0x057,0x0ad,0x103,0x159,0x1af,0x205,0x25b,0x2b1,0x307,0x35d,0x3b3,0x409,0x45f,0x4b5,0x50b,0x561,0x5b7,0x60d,0x663,0x6b9,0x70f,0x765,0x7bb }, - { 0x002,0x058,0x0ae,0x104,0x15a,0x1b0,0x206,0x25c,0x2b2,0x308,0x35e,0x3b4,0x40a,0x460,0x4b6,0x50c,0x562,0x5b8,0x60e,0x664,0x6ba,0x710,0x766,0x7bc }, - { 0x003,0x059,0x0af,0x105,0x15b,0x1b1,0x207,0x25d,0x2b3,0x309,0x35f,0x3b5,0x40b,0x461,0x4b7,0x50d,0x563,0x5b9,0x60f,0x665,0x6bb,0x711,0x767,0x7bd }, - { 0x004,0x05a,0x0b0,0x106,0x15c,0x1b2,0x208,0x25e,0x2b4,0x30a,0x360,0x3b6,0x40c,0x462,0x4b8,0x50e,0x564,0x5ba,0x610,0x666,0x6bc,0x712,0x768,0x7be }, - { 0x005,0x05b,0x0b1,0x107,0x15d,0x1b3,0x209,0x25f,0x2b5,0x30b,0x361,0x3b7,0x40d,0x463,0x4b9,0x50f,0x565,0x5bb,0x611,0x667,0x6bd,0x713,0x769,0x7bf }, - { 0x006,0x05c,0x0b2,0x108,0x15e,0x1b4,0x20a,0x260,0x2b6,0x30c,0x362,0x3b8,0x40e,0x464,0x4ba,0x510,0x566,0x5bc,0x612,0x668,0x6be,0x714,0x76a,0x7c0 }, - { 0x007,0x05d,0x0b3,0x109,0x15f,0x1b5,0x20b,0x261,0x2b7,0x30d,0x363,0x3b9,0x40f,0x465,0x4bb,0x511,0x567,0x5bd,0x613,0x669,0x6bf,0x715,0x76b,0x7c1 }, - { 0x008,0x05e,0x0b4,0x10a,0x160,0x1b6,0x20c,0x262,0x2b8,0x30e,0x364,0x3ba,0x410,0x466,0x4bc,0x512,0x568,0x5be,0x614,0x66a,0x6c0,0x716,0x76c,0x7c2 }, - { 0x009,0x05f,0x0b5,0x10b,0x161,0x1b7,0x20d,0x263,0x2b9,0x30f,0x365,0x3bb,0x411,0x467,0x4bd,0x513,0x569,0x5bf,0x615,0x66b,0x6c1,0x717,0x76d,0x7c3 }, - { 0x00a,0x060,0x0b6,0x10c,0x162,0x1b8,0x20e,0x264,0x2ba,0x310,0x366,0x3bc,0x412,0x468,0x4be,0x514,0x56a,0x5c0,0x616,0x66c,0x6c2,0x718,0x76e,0x7c4 }, - { 0x00b,0x061,0x0b7,0x10d,0x163,0x1b9,0x20f,0x265,0x2bb,0x311,0x367,0x3bd,0x413,0x469,0x4bf,0x515,0x56b,0x5c1,0x617,0x66d,0x6c3,0x719,0x76f,0x7c5 }, - { 0x00c,0x062,0x0b8,0x10e,0x164,0x1ba,0x210,0x266,0x2bc,0x312,0x368,0x3be,0x414,0x46a,0x4c0,0x516,0x56c,0x5c2,0x618,0x66e,0x6c4,0x71a,0x770,0x7c6 }, - { 0x00d,0x063,0x0b9,0x10f,0x165,0x1bb,0x211,0x267,0x2bd,0x313,0x369,0x3bf,0x415,0x46b,0x4c1,0x517,0x56d,0x5c3,0x619,0x66f,0x6c5,0x71b,0x771,0x7c7 }, - { 0x00e,0x064,0x0ba,0x110,0x166,0x1bc,0x212,0x268,0x2be,0x314,0x36a,0x3c0,0x416,0x46c,0x4c2,0x518,0x56e,0x5c4,0x61a,0x670,0x6c6,0x71c,0x772,0x7c8 }, - { 0x00f,0x065,0x0bb,0x111,0x167,0x1bd,0x213,0x269,0x2bf,0x315,0x36b,0x3c1,0x417,0x46d,0x4c3,0x519,0x56f,0x5c5,0x61b,0x671,0x6c7,0x71d,0x773,0x7c9 }, - { 0x010,0x066,0x0bc,0x112,0x168,0x1be,0x214,0x26a,0x2c0,0x316,0x36c,0x3c2,0x418,0x46e,0x4c4,0x51a,0x570,0x5c6,0x61c,0x672,0x6c8,0x71e,0x774,0x7ca }, - { 0x011,0x067,0x0bd,0x113,0x169,0x1bf,0x215,0x26b,0x2c1,0x317,0x36d,0x3c3,0x419,0x46f,0x4c5,0x51b,0x571,0x5c7,0x61d,0x673,0x6c9,0x71f,0x775,0x7cb }, - { 0x012,0x068,0x0be,0x114,0x16a,0x1c0,0x216,0x26c,0x2c2,0x318,0x36e,0x3c4,0x41a,0x470,0x4c6,0x51c,0x572,0x5c8,0x61e,0x674,0x6ca,0x720,0x776,0x7cc }, - { 0x013,0x069,0x0bf,0x115,0x16b,0x1c1,0x217,0x26d,0x2c3,0x319,0x36f,0x3c5,0x41b,0x471,0x4c7,0x51d,0x573,0x5c9,0x61f,0x675,0x6cb,0x721,0x777,0x7cd }, - { 0x014,0x06a,0x0c0,0x116,0x16c,0x1c2,0x218,0x26e,0x2c4,0x31a,0x370,0x3c6,0x41c,0x472,0x4c8,0x51e,0x574,0x5ca,0x620,0x676,0x6cc,0x722,0x778,0x7ce }, - { 0x015,0x06b,0x0c1,0x117,0x16d,0x1c3,0x219,0x26f,0x2c5,0x31b,0x371,0x3c7,0x41d,0x473,0x4c9,0x51f,0x575,0x5cb,0x621,0x677,0x6cd,0x723,0x779,0x7cf }, - { 0x016,0x06c,0x0c2,0x118,0x16e,0x1c4,0x21a,0x270,0x2c6,0x31c,0x372,0x3c8,0x41e,0x474,0x4ca,0x520,0x576,0x5cc,0x622,0x678,0x6ce,0x724,0x77a,0x7d0 }, - { 0x017,0x06d,0x0c3,0x119,0x16f,0x1c5,0x21b,0x271,0x2c7,0x31d,0x373,0x3c9,0x41f,0x475,0x4cb,0x521,0x577,0x5cd,0x623,0x679,0x6cf,0x725,0x77b,0x7d1 }, - { 0x018,0x06e,0x0c4,0x11a,0x170,0x1c6,0x21c,0x272,0x2c8,0x31e,0x374,0x3ca,0x420,0x476,0x4cc,0x522,0x578,0x5ce,0x624,0x67a,0x6d0,0x726,0x77c,0x7d2 }, - 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{ 0x04a,0x0a0,0x0f6,0x14c,0x1a2,0x1f8,0x24e,0x2a4,0x2fa,0x350,0x3a6,0x3fc,0x452,0x4a8,0x4fe,0x554,0x5aa,0x600,0x656,0x6ac,0x702,0x758,0x7ae,0x804 }, - { 0x04b,0x0a1,0x0f7,0x14d,0x1a3,0x1f9,0x24f,0x2a5,0x2fb,0x351,0x3a7,0x3fd,0x453,0x4a9,0x4ff,0x555,0x5ab,0x601,0x657,0x6ad,0x703,0x759,0x7af,0x805 }, - { 0x04c,0x0a2,0x0f8,0x14e,0x1a4,0x1fa,0x250,0x2a6,0x2fc,0x352,0x3a8,0x3fe,0x454,0x4aa,0x500,0x556,0x5ac,0x602,0x658,0x6ae,0x704,0x75a,0x7b0,0x806 }, - { 0x04d,0x0a3,0x0f9,0x14f,0x1a5,0x1fb,0x251,0x2a7,0x2fd,0x353,0x3a9,0x3ff,0x455,0x4ab,0x501,0x557,0x5ad,0x603,0x659,0x6af,0x705,0x75b,0x7b1,0x807 }, - { 0x04e,0x0a4,0x0fa,0x150,0x1a6,0x1fc,0x252,0x2a8,0x2fe,0x354,0x3aa,0x400,0x456,0x4ac,0x502,0x558,0x5ae,0x604,0x65a,0x6b0,0x706,0x75c,0x7b2,0x808 }, - { 0x04f,0x0a5,0x0fb,0x151,0x1a7,0x1fd,0x253,0x2a9,0x2ff,0x355,0x3ab,0x401,0x457,0x4ad,0x503,0x559,0x5af,0x605,0x65b,0x6b1,0x707,0x75d,0x7b3,0x809 }, - { 0x050,0x0a6,0x0fc,0x152,0x1a8,0x1fe,0x254,0x2aa,0x300,0x356,0x3ac,0x402,0x458,0x4ae,0x504,0x55a,0x5b0,0x606,0x65c,0x6b2,0x708,0x75e,0x7b4,0x80a }, - { 0x051,0x0a7,0x0fd,0x153,0x1a9,0x1ff,0x255,0x2ab,0x301,0x357,0x3ad,0x403,0x459,0x4af,0x505,0x55b,0x5b1,0x607,0x65d,0x6b3,0x709,0x75f,0x7b5,0x80b }, - { 0x052,0x0a8,0x0fe,0x154,0x1aa,0x200,0x256,0x2ac,0x302,0x358,0x3ae,0x404,0x45a,0x4b0,0x506,0x55c,0x5b2,0x608,0x65e,0x6b4,0x70a,0x760,0x7b6,0x80c }, - { 0x053,0x0a9,0x0ff,0x155,0x1ab,0x201,0x257,0x2ad,0x303,0x359,0x3af,0x405,0x45b,0x4b1,0x507,0x55d,0x5b3,0x609,0x65f,0x6b5,0x70b,0x761,0x7b7,0x80d }, - { 0x054,0x0aa,0x100,0x156,0x1ac,0x202,0x258,0x2ae,0x304,0x35a,0x3b0,0x406,0x45c,0x4b2,0x508,0x55e,0x5b4,0x60a,0x660,0x6b6,0x70c,0x762,0x7b8,0x80e }, - { 0x055,0x0ab,0x101,0x157,0x1ad,0x203,0x259,0x2af,0x305,0x35b,0x3b1,0x407,0x45d,0x4b3,0x509,0x55f,0x5b5,0x60b,0x661,0x6b7,0x70d,0x763,0x7b9,0x80f } -}; - -/** - * @brief ------------------------------------------------- - * qoffsets - each row represents the addresses used to calculate a byte of the ECC Q - * data 52 (*2) ECC Q bytes, 43 values represented by each - * -------------------------------------------------. - */ - -static const uint16_t qoffsets[ECC_Q_NUM_BYTES][ECC_Q_COMP] = -{ - { 0x000,0x058,0x0b0,0x108,0x160,0x1b8,0x210,0x268,0x2c0,0x318,0x370,0x3c8,0x420,0x478,0x4d0,0x528,0x580,0x5d8,0x630,0x688,0x6e0,0x738,0x790,0x7e8,0x840,0x898,0x034,0x08c,0x0e4,0x13c,0x194,0x1ec,0x244,0x29c,0x2f4,0x34c,0x3a4,0x3fc,0x454,0x4ac,0x504,0x55c,0x5b4 }, - { 0x001,0x059,0x0b1,0x109,0x161,0x1b9,0x211,0x269,0x2c1,0x319,0x371,0x3c9,0x421,0x479,0x4d1,0x529,0x581,0x5d9,0x631,0x689,0x6e1,0x739,0x791,0x7e9,0x841,0x899,0x035,0x08d,0x0e5,0x13d,0x195,0x1ed,0x245,0x29d,0x2f5,0x34d,0x3a5,0x3fd,0x455,0x4ad,0x505,0x55d,0x5b5 }, - { 0x056,0x0ae,0x106,0x15e,0x1b6,0x20e,0x266,0x2be,0x316,0x36e,0x3c6,0x41e,0x476,0x4ce,0x526,0x57e,0x5d6,0x62e,0x686,0x6de,0x736,0x78e,0x7e6,0x83e,0x896,0x032,0x08a,0x0e2,0x13a,0x192,0x1ea,0x242,0x29a,0x2f2,0x34a,0x3a2,0x3fa,0x452,0x4aa,0x502,0x55a,0x5b2,0x60a }, - { 0x057,0x0af,0x107,0x15f,0x1b7,0x20f,0x267,0x2bf,0x317,0x36f,0x3c7,0x41f,0x477,0x4cf,0x527,0x57f,0x5d7,0x62f,0x687,0x6df,0x737,0x78f,0x7e7,0x83f,0x897,0x033,0x08b,0x0e3,0x13b,0x193,0x1eb,0x243,0x29b,0x2f3,0x34b,0x3a3,0x3fb,0x453,0x4ab,0x503,0x55b,0x5b3,0x60b }, - { 0x0ac,0x104,0x15c,0x1b4,0x20c,0x264,0x2bc,0x314,0x36c,0x3c4,0x41c,0x474,0x4cc,0x524,0x57c,0x5d4,0x62c,0x684,0x6dc,0x734,0x78c,0x7e4,0x83c,0x894,0x030,0x088,0x0e0,0x138,0x190,0x1e8,0x240,0x298,0x2f0,0x348,0x3a0,0x3f8,0x450,0x4a8,0x500,0x558,0x5b0,0x608,0x660 }, - { 0x0ad,0x105,0x15d,0x1b5,0x20d,0x265,0x2bd,0x315,0x36d,0x3c5,0x41d,0x475,0x4cd,0x525,0x57d,0x5d5,0x62d,0x685,0x6dd,0x735,0x78d,0x7e5,0x83d,0x895,0x031,0x089,0x0e1,0x139,0x191,0x1e9,0x241,0x299,0x2f1,0x349,0x3a1,0x3f9,0x451,0x4a9,0x501,0x559,0x5b1,0x609,0x661 }, - { 0x102,0x15a,0x1b2,0x20a,0x262,0x2ba,0x312,0x36a,0x3c2,0x41a,0x472,0x4ca,0x522,0x57a,0x5d2,0x62a,0x682,0x6da,0x732,0x78a,0x7e2,0x83a,0x892,0x02e,0x086,0x0de,0x136,0x18e,0x1e6,0x23e,0x296,0x2ee,0x346,0x39e,0x3f6,0x44e,0x4a6,0x4fe,0x556,0x5ae,0x606,0x65e,0x6b6 }, - { 0x103,0x15b,0x1b3,0x20b,0x263,0x2bb,0x313,0x36b,0x3c3,0x41b,0x473,0x4cb,0x523,0x57b,0x5d3,0x62b,0x683,0x6db,0x733,0x78b,0x7e3,0x83b,0x893,0x02f,0x087,0x0df,0x137,0x18f,0x1e7,0x23f,0x297,0x2ef,0x347,0x39f,0x3f7,0x44f,0x4a7,0x4ff,0x557,0x5af,0x607,0x65f,0x6b7 }, - { 0x158,0x1b0,0x208,0x260,0x2b8,0x310,0x368,0x3c0,0x418,0x470,0x4c8,0x520,0x578,0x5d0,0x628,0x680,0x6d8,0x730,0x788,0x7e0,0x838,0x890,0x02c,0x084,0x0dc,0x134,0x18c,0x1e4,0x23c,0x294,0x2ec,0x344,0x39c,0x3f4,0x44c,0x4a4,0x4fc,0x554,0x5ac,0x604,0x65c,0x6b4,0x70c }, - { 0x159,0x1b1,0x209,0x261,0x2b9,0x311,0x369,0x3c1,0x419,0x471,0x4c9,0x521,0x579,0x5d1,0x629,0x681,0x6d9,0x731,0x789,0x7e1,0x839,0x891,0x02d,0x085,0x0dd,0x135,0x18d,0x1e5,0x23d,0x295,0x2ed,0x345,0x39d,0x3f5,0x44d,0x4a5,0x4fd,0x555,0x5ad,0x605,0x65d,0x6b5,0x70d }, - { 0x1ae,0x206,0x25e,0x2b6,0x30e,0x366,0x3be,0x416,0x46e,0x4c6,0x51e,0x576,0x5ce,0x626,0x67e,0x6d6,0x72e,0x786,0x7de,0x836,0x88e,0x02a,0x082,0x0da,0x132,0x18a,0x1e2,0x23a,0x292,0x2ea,0x342,0x39a,0x3f2,0x44a,0x4a2,0x4fa,0x552,0x5aa,0x602,0x65a,0x6b2,0x70a,0x762 }, - { 0x1af,0x207,0x25f,0x2b7,0x30f,0x367,0x3bf,0x417,0x46f,0x4c7,0x51f,0x577,0x5cf,0x627,0x67f,0x6d7,0x72f,0x787,0x7df,0x837,0x88f,0x02b,0x083,0x0db,0x133,0x18b,0x1e3,0x23b,0x293,0x2eb,0x343,0x39b,0x3f3,0x44b,0x4a3,0x4fb,0x553,0x5ab,0x603,0x65b,0x6b3,0x70b,0x763 }, - 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{ 0x764,0x7bc,0x814,0x86c,0x008,0x060,0x0b8,0x110,0x168,0x1c0,0x218,0x270,0x2c8,0x320,0x378,0x3d0,0x428,0x480,0x4d8,0x530,0x588,0x5e0,0x638,0x690,0x6e8,0x740,0x798,0x7f0,0x848,0x8a0,0x03c,0x094,0x0ec,0x144,0x19c,0x1f4,0x24c,0x2a4,0x2fc,0x354,0x3ac,0x404,0x45c }, - { 0x765,0x7bd,0x815,0x86d,0x009,0x061,0x0b9,0x111,0x169,0x1c1,0x219,0x271,0x2c9,0x321,0x379,0x3d1,0x429,0x481,0x4d9,0x531,0x589,0x5e1,0x639,0x691,0x6e9,0x741,0x799,0x7f1,0x849,0x8a1,0x03d,0x095,0x0ed,0x145,0x19d,0x1f5,0x24d,0x2a5,0x2fd,0x355,0x3ad,0x405,0x45d }, - { 0x7ba,0x812,0x86a,0x006,0x05e,0x0b6,0x10e,0x166,0x1be,0x216,0x26e,0x2c6,0x31e,0x376,0x3ce,0x426,0x47e,0x4d6,0x52e,0x586,0x5de,0x636,0x68e,0x6e6,0x73e,0x796,0x7ee,0x846,0x89e,0x03a,0x092,0x0ea,0x142,0x19a,0x1f2,0x24a,0x2a2,0x2fa,0x352,0x3aa,0x402,0x45a,0x4b2 }, - { 0x7bb,0x813,0x86b,0x007,0x05f,0x0b7,0x10f,0x167,0x1bf,0x217,0x26f,0x2c7,0x31f,0x377,0x3cf,0x427,0x47f,0x4d7,0x52f,0x587,0x5df,0x637,0x68f,0x6e7,0x73f,0x797,0x7ef,0x847,0x89f,0x03b,0x093,0x0eb,0x143,0x19b,0x1f3,0x24b,0x2a3,0x2fb,0x353,0x3ab,0x403,0x45b,0x4b3 }, - { 0x810,0x868,0x004,0x05c,0x0b4,0x10c,0x164,0x1bc,0x214,0x26c,0x2c4,0x31c,0x374,0x3cc,0x424,0x47c,0x4d4,0x52c,0x584,0x5dc,0x634,0x68c,0x6e4,0x73c,0x794,0x7ec,0x844,0x89c,0x038,0x090,0x0e8,0x140,0x198,0x1f0,0x248,0x2a0,0x2f8,0x350,0x3a8,0x400,0x458,0x4b0,0x508 }, - { 0x811,0x869,0x005,0x05d,0x0b5,0x10d,0x165,0x1bd,0x215,0x26d,0x2c5,0x31d,0x375,0x3cd,0x425,0x47d,0x4d5,0x52d,0x585,0x5dd,0x635,0x68d,0x6e5,0x73d,0x795,0x7ed,0x845,0x89d,0x039,0x091,0x0e9,0x141,0x199,0x1f1,0x249,0x2a1,0x2f9,0x351,0x3a9,0x401,0x459,0x4b1,0x509 }, - { 0x866,0x002,0x05a,0x0b2,0x10a,0x162,0x1ba,0x212,0x26a,0x2c2,0x31a,0x372,0x3ca,0x422,0x47a,0x4d2,0x52a,0x582,0x5da,0x632,0x68a,0x6e2,0x73a,0x792,0x7ea,0x842,0x89a,0x036,0x08e,0x0e6,0x13e,0x196,0x1ee,0x246,0x29e,0x2f6,0x34e,0x3a6,0x3fe,0x456,0x4ae,0x506,0x55e }, - { 0x867,0x003,0x05b,0x0b3,0x10b,0x163,0x1bb,0x213,0x26b,0x2c3,0x31b,0x373,0x3cb,0x423,0x47b,0x4d3,0x52b,0x583,0x5db,0x633,0x68b,0x6e3,0x73b,0x793,0x7eb,0x843,0x89b,0x037,0x08f,0x0e7,0x13f,0x197,0x1ef,0x247,0x29f,0x2f7,0x34f,0x3a7,0x3ff,0x457,0x4af,0x507,0x55f } -}; - - -//------------------------------------------------- -// ecc_source_byte - return data from the sector -// at the given offset, masking anything -// particular to a mode -//------------------------------------------------- - -static uint8_t ecc_source_byte(const uint8_t *sector, uint32_t offset) -{ - // in mode 2 always treat these as 0 bytes - return (sector[MODE_OFFSET] == 2 && offset < 4) ? 0x00 : sector[SYNC_OFFSET + SYNC_NUM_BYTES + offset]; -} - -/** - * @fn void ecc_compute_bytes(const uint8_t *sector, const uint16_t *row, int rowlen, uint8_t &val1, uint8_t &val2) - * - * @brief ------------------------------------------------- - * ecc_compute_bytes - calculate an ECC value (P or Q) - * -------------------------------------------------. - * - * @param sector The sector. - * @param row The row. - * @param rowlen The rowlen. - * @param [in,out] val1 The first value. - * @param [in,out] val2 The second value. - */ - -void ecc_compute_bytes(const uint8_t *sector, const uint16_t *row, int rowlen, uint8_t *val1, uint8_t *val2) -{ - int component; - *val1 = *val2 = 0; - for (component = 0; component < rowlen; component++) - { - *val1 ^= ecc_source_byte(sector, row[component]); - *val2 ^= ecc_source_byte(sector, row[component]); - *val1 = ecclow[*val1]; - } - *val1 = ecchigh[ecclow[*val1] ^ *val2]; - *val2 ^= *val1; -} - -/** - * @fn int ecc_verify(const uint8_t *sector) - * - * @brief ------------------------------------------------- - * ecc_verify - verify the P and Q ECC codes in a sector - * -------------------------------------------------. - * - * @param sector The sector. - * - * @return true if it succeeds, false if it fails. - */ - -int ecc_verify(const uint8_t *sector) -{ - int byte; - - // first verify P bytes - for (byte = 0; byte < ECC_P_NUM_BYTES; byte++) - { - uint8_t val1, val2; - ecc_compute_bytes(sector, poffsets[byte], ECC_P_COMP, &val1, &val2); - if (sector[ECC_P_OFFSET + byte] != val1 || sector[ECC_P_OFFSET + ECC_P_NUM_BYTES + byte] != val2) - return 0; - } - - // then verify Q bytes - for (byte = 0; byte < ECC_Q_NUM_BYTES; byte++) - { - uint8_t val1, val2; - ecc_compute_bytes(sector, qoffsets[byte], ECC_Q_COMP, &val1, &val2); - if (sector[ECC_Q_OFFSET + byte] != val1 || sector[ECC_Q_OFFSET + ECC_Q_NUM_BYTES + byte] != val2) - return 0; - } - return 1; -} - -/** - * @fn void ecc_generate(uint8_t *sector) - * - * @brief ------------------------------------------------- - * ecc_generate - generate the P and Q ECC codes for a sector, overwriting any - * existing codes - * -------------------------------------------------. - * - * @param [in,out] sector If non-null, the sector. - */ - -void ecc_generate(uint8_t *sector) -{ - int byte; - // first verify P bytes - for (byte = 0; byte < ECC_P_NUM_BYTES; byte++) - ecc_compute_bytes(sector, poffsets[byte], ECC_P_COMP, §or[ECC_P_OFFSET + byte], §or[ECC_P_OFFSET + ECC_P_NUM_BYTES + byte]); - - // then verify Q bytes - for (byte = 0; byte < ECC_Q_NUM_BYTES; byte++) - ecc_compute_bytes(sector, qoffsets[byte], ECC_Q_COMP, §or[ECC_Q_OFFSET + byte], §or[ECC_Q_OFFSET + ECC_Q_NUM_BYTES + byte]); -} - -/** - * @fn void ecc_clear(uint8_t *sector) - * - * @brief ------------------------------------------------- - * ecc_clear - erase the ECC P and Q cods to 0 within a sector - * -------------------------------------------------. - * - * @param [in,out] sector If non-null, the sector. - */ - -void ecc_clear(uint8_t *sector) -{ - memset(§or[ECC_P_OFFSET], 0, 2 * ECC_P_NUM_BYTES); - memset(§or[ECC_Q_OFFSET], 0, 2 * ECC_Q_NUM_BYTES); -} +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +*************************************************************************** + + cdrom.c + + Generic MAME CD-ROM utilties - build IDE and SCSI CD-ROMs on top of this + +**************************************************************************** + + IMPORTANT: + "physical" block addresses are the actual addresses on the emulated CD. + "chd" block addresses are the block addresses in the CHD file. + Because we pad each track to a 4-frame boundary, these addressing + schemes will differ after track 1! + +***************************************************************************/ + +#include +#include + +#include "cdrom.h" + +/*************************************************************************** + DEBUGGING +***************************************************************************/ + +/** @brief The verbose. */ +#define VERBOSE (0) +#if VERBOSE + +/** + * @def LOG(x) do + * + * @brief A macro that defines log. + * + * @param x The void to process. + */ + +#define LOG(x) do { if (VERBOSE) logerror x; } while (0) + +/** + * @fn void CLIB_DECL logerror(const char *text, ...) ATTR_PRINTF(1,2); + * + * @brief Logerrors the given text. + * + * @param text The text. + * + * @return A CLIB_DECL. + */ + +void CLIB_DECL logerror(const char *text, ...) ATTR_PRINTF(1,2); +#else + +/** + * @def LOG(x); + * + * @brief A macro that defines log. + * + * @param x The void to process. + */ + +#define LOG(x) +#endif + +/*************************************************************************** + CONSTANTS +***************************************************************************/ + +/** @brief offset within sector. */ +#define SYNC_OFFSET 0x000 +/** @brief 12 bytes. */ +#define SYNC_NUM_BYTES 12 + +/** @brief offset within sector. */ +#define MODE_OFFSET 0x00f + +/** @brief offset within sector. */ +#define ECC_P_OFFSET 0x81c +/** @brief 2 lots of 86. */ +#define ECC_P_NUM_BYTES 86 +/** @brief 24 bytes each. */ +#define ECC_P_COMP 24 + +/** @brief The ECC q offset. */ +#define ECC_Q_OFFSET (ECC_P_OFFSET + 2 * ECC_P_NUM_BYTES) +/** @brief 2 lots of 52. */ +#define ECC_Q_NUM_BYTES 52 +/** @brief 43 bytes each. */ +#define ECC_Q_COMP 43 + +/** + * @brief ------------------------------------------------- + * ECC lookup tables pre-calculated tables for ECC data calcs + * -------------------------------------------------. + */ + +static const uint8_t ecclow[256] = +{ + 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e, + 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e, + 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e, + 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e, + 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e, + 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe, + 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde, + 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe, + 0x1d, 0x1f, 0x19, 0x1b, 0x15, 0x17, 0x11, 0x13, 0x0d, 0x0f, 0x09, 0x0b, 0x05, 0x07, 0x01, 0x03, + 0x3d, 0x3f, 0x39, 0x3b, 0x35, 0x37, 0x31, 0x33, 0x2d, 0x2f, 0x29, 0x2b, 0x25, 0x27, 0x21, 0x23, + 0x5d, 0x5f, 0x59, 0x5b, 0x55, 0x57, 0x51, 0x53, 0x4d, 0x4f, 0x49, 0x4b, 0x45, 0x47, 0x41, 0x43, + 0x7d, 0x7f, 0x79, 0x7b, 0x75, 0x77, 0x71, 0x73, 0x6d, 0x6f, 0x69, 0x6b, 0x65, 0x67, 0x61, 0x63, + 0x9d, 0x9f, 0x99, 0x9b, 0x95, 0x97, 0x91, 0x93, 0x8d, 0x8f, 0x89, 0x8b, 0x85, 0x87, 0x81, 0x83, + 0xbd, 0xbf, 0xb9, 0xbb, 0xb5, 0xb7, 0xb1, 0xb3, 0xad, 0xaf, 0xa9, 0xab, 0xa5, 0xa7, 0xa1, 0xa3, + 0xdd, 0xdf, 0xd9, 0xdb, 0xd5, 0xd7, 0xd1, 0xd3, 0xcd, 0xcf, 0xc9, 0xcb, 0xc5, 0xc7, 0xc1, 0xc3, + 0xfd, 0xff, 0xf9, 0xfb, 0xf5, 0xf7, 0xf1, 0xf3, 0xed, 0xef, 0xe9, 0xeb, 0xe5, 0xe7, 0xe1, 0xe3 +}; + +/** @brief The ecchigh[ 256]. */ +static const uint8_t ecchigh[256] = +{ + 0x00, 0xf4, 0xf5, 0x01, 0xf7, 0x03, 0x02, 0xf6, 0xf3, 0x07, 0x06, 0xf2, 0x04, 0xf0, 0xf1, 0x05, + 0xfb, 0x0f, 0x0e, 0xfa, 0x0c, 0xf8, 0xf9, 0x0d, 0x08, 0xfc, 0xfd, 0x09, 0xff, 0x0b, 0x0a, 0xfe, + 0xeb, 0x1f, 0x1e, 0xea, 0x1c, 0xe8, 0xe9, 0x1d, 0x18, 0xec, 0xed, 0x19, 0xef, 0x1b, 0x1a, 0xee, + 0x10, 0xe4, 0xe5, 0x11, 0xe7, 0x13, 0x12, 0xe6, 0xe3, 0x17, 0x16, 0xe2, 0x14, 0xe0, 0xe1, 0x15, + 0xcb, 0x3f, 0x3e, 0xca, 0x3c, 0xc8, 0xc9, 0x3d, 0x38, 0xcc, 0xcd, 0x39, 0xcf, 0x3b, 0x3a, 0xce, + 0x30, 0xc4, 0xc5, 0x31, 0xc7, 0x33, 0x32, 0xc6, 0xc3, 0x37, 0x36, 0xc2, 0x34, 0xc0, 0xc1, 0x35, + 0x20, 0xd4, 0xd5, 0x21, 0xd7, 0x23, 0x22, 0xd6, 0xd3, 0x27, 0x26, 0xd2, 0x24, 0xd0, 0xd1, 0x25, + 0xdb, 0x2f, 0x2e, 0xda, 0x2c, 0xd8, 0xd9, 0x2d, 0x28, 0xdc, 0xdd, 0x29, 0xdf, 0x2b, 0x2a, 0xde, + 0x8b, 0x7f, 0x7e, 0x8a, 0x7c, 0x88, 0x89, 0x7d, 0x78, 0x8c, 0x8d, 0x79, 0x8f, 0x7b, 0x7a, 0x8e, + 0x70, 0x84, 0x85, 0x71, 0x87, 0x73, 0x72, 0x86, 0x83, 0x77, 0x76, 0x82, 0x74, 0x80, 0x81, 0x75, + 0x60, 0x94, 0x95, 0x61, 0x97, 0x63, 0x62, 0x96, 0x93, 0x67, 0x66, 0x92, 0x64, 0x90, 0x91, 0x65, + 0x9b, 0x6f, 0x6e, 0x9a, 0x6c, 0x98, 0x99, 0x6d, 0x68, 0x9c, 0x9d, 0x69, 0x9f, 0x6b, 0x6a, 0x9e, + 0x40, 0xb4, 0xb5, 0x41, 0xb7, 0x43, 0x42, 0xb6, 0xb3, 0x47, 0x46, 0xb2, 0x44, 0xb0, 0xb1, 0x45, + 0xbb, 0x4f, 0x4e, 0xba, 0x4c, 0xb8, 0xb9, 0x4d, 0x48, 0xbc, 0xbd, 0x49, 0xbf, 0x4b, 0x4a, 0xbe, + 0xab, 0x5f, 0x5e, 0xaa, 0x5c, 0xa8, 0xa9, 0x5d, 0x58, 0xac, 0xad, 0x59, 0xaf, 0x5b, 0x5a, 0xae, + 0x50, 0xa4, 0xa5, 0x51, 0xa7, 0x53, 0x52, 0xa6, 0xa3, 0x57, 0x56, 0xa2, 0x54, 0xa0, 0xa1, 0x55 +}; + +/** + * @brief ------------------------------------------------- + * poffsets - each row represents the addresses used to calculate a byte of the ECC P + * data 86 (*2) ECC P bytes, 24 values represented by each + * -------------------------------------------------. + */ + +static const uint16_t poffsets[ECC_P_NUM_BYTES][ECC_P_COMP] = +{ + { 0x000,0x056,0x0ac,0x102,0x158,0x1ae,0x204,0x25a,0x2b0,0x306,0x35c,0x3b2,0x408,0x45e,0x4b4,0x50a,0x560,0x5b6,0x60c,0x662,0x6b8,0x70e,0x764,0x7ba }, + { 0x001,0x057,0x0ad,0x103,0x159,0x1af,0x205,0x25b,0x2b1,0x307,0x35d,0x3b3,0x409,0x45f,0x4b5,0x50b,0x561,0x5b7,0x60d,0x663,0x6b9,0x70f,0x765,0x7bb }, + { 0x002,0x058,0x0ae,0x104,0x15a,0x1b0,0x206,0x25c,0x2b2,0x308,0x35e,0x3b4,0x40a,0x460,0x4b6,0x50c,0x562,0x5b8,0x60e,0x664,0x6ba,0x710,0x766,0x7bc }, + { 0x003,0x059,0x0af,0x105,0x15b,0x1b1,0x207,0x25d,0x2b3,0x309,0x35f,0x3b5,0x40b,0x461,0x4b7,0x50d,0x563,0x5b9,0x60f,0x665,0x6bb,0x711,0x767,0x7bd }, + { 0x004,0x05a,0x0b0,0x106,0x15c,0x1b2,0x208,0x25e,0x2b4,0x30a,0x360,0x3b6,0x40c,0x462,0x4b8,0x50e,0x564,0x5ba,0x610,0x666,0x6bc,0x712,0x768,0x7be }, + { 0x005,0x05b,0x0b1,0x107,0x15d,0x1b3,0x209,0x25f,0x2b5,0x30b,0x361,0x3b7,0x40d,0x463,0x4b9,0x50f,0x565,0x5bb,0x611,0x667,0x6bd,0x713,0x769,0x7bf }, + { 0x006,0x05c,0x0b2,0x108,0x15e,0x1b4,0x20a,0x260,0x2b6,0x30c,0x362,0x3b8,0x40e,0x464,0x4ba,0x510,0x566,0x5bc,0x612,0x668,0x6be,0x714,0x76a,0x7c0 }, + { 0x007,0x05d,0x0b3,0x109,0x15f,0x1b5,0x20b,0x261,0x2b7,0x30d,0x363,0x3b9,0x40f,0x465,0x4bb,0x511,0x567,0x5bd,0x613,0x669,0x6bf,0x715,0x76b,0x7c1 }, + { 0x008,0x05e,0x0b4,0x10a,0x160,0x1b6,0x20c,0x262,0x2b8,0x30e,0x364,0x3ba,0x410,0x466,0x4bc,0x512,0x568,0x5be,0x614,0x66a,0x6c0,0x716,0x76c,0x7c2 }, + { 0x009,0x05f,0x0b5,0x10b,0x161,0x1b7,0x20d,0x263,0x2b9,0x30f,0x365,0x3bb,0x411,0x467,0x4bd,0x513,0x569,0x5bf,0x615,0x66b,0x6c1,0x717,0x76d,0x7c3 }, + { 0x00a,0x060,0x0b6,0x10c,0x162,0x1b8,0x20e,0x264,0x2ba,0x310,0x366,0x3bc,0x412,0x468,0x4be,0x514,0x56a,0x5c0,0x616,0x66c,0x6c2,0x718,0x76e,0x7c4 }, + { 0x00b,0x061,0x0b7,0x10d,0x163,0x1b9,0x20f,0x265,0x2bb,0x311,0x367,0x3bd,0x413,0x469,0x4bf,0x515,0x56b,0x5c1,0x617,0x66d,0x6c3,0x719,0x76f,0x7c5 }, + { 0x00c,0x062,0x0b8,0x10e,0x164,0x1ba,0x210,0x266,0x2bc,0x312,0x368,0x3be,0x414,0x46a,0x4c0,0x516,0x56c,0x5c2,0x618,0x66e,0x6c4,0x71a,0x770,0x7c6 }, + { 0x00d,0x063,0x0b9,0x10f,0x165,0x1bb,0x211,0x267,0x2bd,0x313,0x369,0x3bf,0x415,0x46b,0x4c1,0x517,0x56d,0x5c3,0x619,0x66f,0x6c5,0x71b,0x771,0x7c7 }, + { 0x00e,0x064,0x0ba,0x110,0x166,0x1bc,0x212,0x268,0x2be,0x314,0x36a,0x3c0,0x416,0x46c,0x4c2,0x518,0x56e,0x5c4,0x61a,0x670,0x6c6,0x71c,0x772,0x7c8 }, + { 0x00f,0x065,0x0bb,0x111,0x167,0x1bd,0x213,0x269,0x2bf,0x315,0x36b,0x3c1,0x417,0x46d,0x4c3,0x519,0x56f,0x5c5,0x61b,0x671,0x6c7,0x71d,0x773,0x7c9 }, + { 0x010,0x066,0x0bc,0x112,0x168,0x1be,0x214,0x26a,0x2c0,0x316,0x36c,0x3c2,0x418,0x46e,0x4c4,0x51a,0x570,0x5c6,0x61c,0x672,0x6c8,0x71e,0x774,0x7ca }, + { 0x011,0x067,0x0bd,0x113,0x169,0x1bf,0x215,0x26b,0x2c1,0x317,0x36d,0x3c3,0x419,0x46f,0x4c5,0x51b,0x571,0x5c7,0x61d,0x673,0x6c9,0x71f,0x775,0x7cb }, + { 0x012,0x068,0x0be,0x114,0x16a,0x1c0,0x216,0x26c,0x2c2,0x318,0x36e,0x3c4,0x41a,0x470,0x4c6,0x51c,0x572,0x5c8,0x61e,0x674,0x6ca,0x720,0x776,0x7cc }, + { 0x013,0x069,0x0bf,0x115,0x16b,0x1c1,0x217,0x26d,0x2c3,0x319,0x36f,0x3c5,0x41b,0x471,0x4c7,0x51d,0x573,0x5c9,0x61f,0x675,0x6cb,0x721,0x777,0x7cd }, + { 0x014,0x06a,0x0c0,0x116,0x16c,0x1c2,0x218,0x26e,0x2c4,0x31a,0x370,0x3c6,0x41c,0x472,0x4c8,0x51e,0x574,0x5ca,0x620,0x676,0x6cc,0x722,0x778,0x7ce }, + { 0x015,0x06b,0x0c1,0x117,0x16d,0x1c3,0x219,0x26f,0x2c5,0x31b,0x371,0x3c7,0x41d,0x473,0x4c9,0x51f,0x575,0x5cb,0x621,0x677,0x6cd,0x723,0x779,0x7cf }, + { 0x016,0x06c,0x0c2,0x118,0x16e,0x1c4,0x21a,0x270,0x2c6,0x31c,0x372,0x3c8,0x41e,0x474,0x4ca,0x520,0x576,0x5cc,0x622,0x678,0x6ce,0x724,0x77a,0x7d0 }, + { 0x017,0x06d,0x0c3,0x119,0x16f,0x1c5,0x21b,0x271,0x2c7,0x31d,0x373,0x3c9,0x41f,0x475,0x4cb,0x521,0x577,0x5cd,0x623,0x679,0x6cf,0x725,0x77b,0x7d1 }, + { 0x018,0x06e,0x0c4,0x11a,0x170,0x1c6,0x21c,0x272,0x2c8,0x31e,0x374,0x3ca,0x420,0x476,0x4cc,0x522,0x578,0x5ce,0x624,0x67a,0x6d0,0x726,0x77c,0x7d2 }, + { 0x019,0x06f,0x0c5,0x11b,0x171,0x1c7,0x21d,0x273,0x2c9,0x31f,0x375,0x3cb,0x421,0x477,0x4cd,0x523,0x579,0x5cf,0x625,0x67b,0x6d1,0x727,0x77d,0x7d3 }, + { 0x01a,0x070,0x0c6,0x11c,0x172,0x1c8,0x21e,0x274,0x2ca,0x320,0x376,0x3cc,0x422,0x478,0x4ce,0x524,0x57a,0x5d0,0x626,0x67c,0x6d2,0x728,0x77e,0x7d4 }, + { 0x01b,0x071,0x0c7,0x11d,0x173,0x1c9,0x21f,0x275,0x2cb,0x321,0x377,0x3cd,0x423,0x479,0x4cf,0x525,0x57b,0x5d1,0x627,0x67d,0x6d3,0x729,0x77f,0x7d5 }, + { 0x01c,0x072,0x0c8,0x11e,0x174,0x1ca,0x220,0x276,0x2cc,0x322,0x378,0x3ce,0x424,0x47a,0x4d0,0x526,0x57c,0x5d2,0x628,0x67e,0x6d4,0x72a,0x780,0x7d6 }, + { 0x01d,0x073,0x0c9,0x11f,0x175,0x1cb,0x221,0x277,0x2cd,0x323,0x379,0x3cf,0x425,0x47b,0x4d1,0x527,0x57d,0x5d3,0x629,0x67f,0x6d5,0x72b,0x781,0x7d7 }, + { 0x01e,0x074,0x0ca,0x120,0x176,0x1cc,0x222,0x278,0x2ce,0x324,0x37a,0x3d0,0x426,0x47c,0x4d2,0x528,0x57e,0x5d4,0x62a,0x680,0x6d6,0x72c,0x782,0x7d8 }, + { 0x01f,0x075,0x0cb,0x121,0x177,0x1cd,0x223,0x279,0x2cf,0x325,0x37b,0x3d1,0x427,0x47d,0x4d3,0x529,0x57f,0x5d5,0x62b,0x681,0x6d7,0x72d,0x783,0x7d9 }, + { 0x020,0x076,0x0cc,0x122,0x178,0x1ce,0x224,0x27a,0x2d0,0x326,0x37c,0x3d2,0x428,0x47e,0x4d4,0x52a,0x580,0x5d6,0x62c,0x682,0x6d8,0x72e,0x784,0x7da }, + { 0x021,0x077,0x0cd,0x123,0x179,0x1cf,0x225,0x27b,0x2d1,0x327,0x37d,0x3d3,0x429,0x47f,0x4d5,0x52b,0x581,0x5d7,0x62d,0x683,0x6d9,0x72f,0x785,0x7db }, + { 0x022,0x078,0x0ce,0x124,0x17a,0x1d0,0x226,0x27c,0x2d2,0x328,0x37e,0x3d4,0x42a,0x480,0x4d6,0x52c,0x582,0x5d8,0x62e,0x684,0x6da,0x730,0x786,0x7dc }, + { 0x023,0x079,0x0cf,0x125,0x17b,0x1d1,0x227,0x27d,0x2d3,0x329,0x37f,0x3d5,0x42b,0x481,0x4d7,0x52d,0x583,0x5d9,0x62f,0x685,0x6db,0x731,0x787,0x7dd }, + { 0x024,0x07a,0x0d0,0x126,0x17c,0x1d2,0x228,0x27e,0x2d4,0x32a,0x380,0x3d6,0x42c,0x482,0x4d8,0x52e,0x584,0x5da,0x630,0x686,0x6dc,0x732,0x788,0x7de }, + { 0x025,0x07b,0x0d1,0x127,0x17d,0x1d3,0x229,0x27f,0x2d5,0x32b,0x381,0x3d7,0x42d,0x483,0x4d9,0x52f,0x585,0x5db,0x631,0x687,0x6dd,0x733,0x789,0x7df }, + { 0x026,0x07c,0x0d2,0x128,0x17e,0x1d4,0x22a,0x280,0x2d6,0x32c,0x382,0x3d8,0x42e,0x484,0x4da,0x530,0x586,0x5dc,0x632,0x688,0x6de,0x734,0x78a,0x7e0 }, + { 0x027,0x07d,0x0d3,0x129,0x17f,0x1d5,0x22b,0x281,0x2d7,0x32d,0x383,0x3d9,0x42f,0x485,0x4db,0x531,0x587,0x5dd,0x633,0x689,0x6df,0x735,0x78b,0x7e1 }, + { 0x028,0x07e,0x0d4,0x12a,0x180,0x1d6,0x22c,0x282,0x2d8,0x32e,0x384,0x3da,0x430,0x486,0x4dc,0x532,0x588,0x5de,0x634,0x68a,0x6e0,0x736,0x78c,0x7e2 }, + { 0x029,0x07f,0x0d5,0x12b,0x181,0x1d7,0x22d,0x283,0x2d9,0x32f,0x385,0x3db,0x431,0x487,0x4dd,0x533,0x589,0x5df,0x635,0x68b,0x6e1,0x737,0x78d,0x7e3 }, + { 0x02a,0x080,0x0d6,0x12c,0x182,0x1d8,0x22e,0x284,0x2da,0x330,0x386,0x3dc,0x432,0x488,0x4de,0x534,0x58a,0x5e0,0x636,0x68c,0x6e2,0x738,0x78e,0x7e4 }, + { 0x02b,0x081,0x0d7,0x12d,0x183,0x1d9,0x22f,0x285,0x2db,0x331,0x387,0x3dd,0x433,0x489,0x4df,0x535,0x58b,0x5e1,0x637,0x68d,0x6e3,0x739,0x78f,0x7e5 }, + { 0x02c,0x082,0x0d8,0x12e,0x184,0x1da,0x230,0x286,0x2dc,0x332,0x388,0x3de,0x434,0x48a,0x4e0,0x536,0x58c,0x5e2,0x638,0x68e,0x6e4,0x73a,0x790,0x7e6 }, + { 0x02d,0x083,0x0d9,0x12f,0x185,0x1db,0x231,0x287,0x2dd,0x333,0x389,0x3df,0x435,0x48b,0x4e1,0x537,0x58d,0x5e3,0x639,0x68f,0x6e5,0x73b,0x791,0x7e7 }, + { 0x02e,0x084,0x0da,0x130,0x186,0x1dc,0x232,0x288,0x2de,0x334,0x38a,0x3e0,0x436,0x48c,0x4e2,0x538,0x58e,0x5e4,0x63a,0x690,0x6e6,0x73c,0x792,0x7e8 }, + { 0x02f,0x085,0x0db,0x131,0x187,0x1dd,0x233,0x289,0x2df,0x335,0x38b,0x3e1,0x437,0x48d,0x4e3,0x539,0x58f,0x5e5,0x63b,0x691,0x6e7,0x73d,0x793,0x7e9 }, + { 0x030,0x086,0x0dc,0x132,0x188,0x1de,0x234,0x28a,0x2e0,0x336,0x38c,0x3e2,0x438,0x48e,0x4e4,0x53a,0x590,0x5e6,0x63c,0x692,0x6e8,0x73e,0x794,0x7ea }, + { 0x031,0x087,0x0dd,0x133,0x189,0x1df,0x235,0x28b,0x2e1,0x337,0x38d,0x3e3,0x439,0x48f,0x4e5,0x53b,0x591,0x5e7,0x63d,0x693,0x6e9,0x73f,0x795,0x7eb }, + { 0x032,0x088,0x0de,0x134,0x18a,0x1e0,0x236,0x28c,0x2e2,0x338,0x38e,0x3e4,0x43a,0x490,0x4e6,0x53c,0x592,0x5e8,0x63e,0x694,0x6ea,0x740,0x796,0x7ec }, + { 0x033,0x089,0x0df,0x135,0x18b,0x1e1,0x237,0x28d,0x2e3,0x339,0x38f,0x3e5,0x43b,0x491,0x4e7,0x53d,0x593,0x5e9,0x63f,0x695,0x6eb,0x741,0x797,0x7ed }, + { 0x034,0x08a,0x0e0,0x136,0x18c,0x1e2,0x238,0x28e,0x2e4,0x33a,0x390,0x3e6,0x43c,0x492,0x4e8,0x53e,0x594,0x5ea,0x640,0x696,0x6ec,0x742,0x798,0x7ee }, + { 0x035,0x08b,0x0e1,0x137,0x18d,0x1e3,0x239,0x28f,0x2e5,0x33b,0x391,0x3e7,0x43d,0x493,0x4e9,0x53f,0x595,0x5eb,0x641,0x697,0x6ed,0x743,0x799,0x7ef }, + { 0x036,0x08c,0x0e2,0x138,0x18e,0x1e4,0x23a,0x290,0x2e6,0x33c,0x392,0x3e8,0x43e,0x494,0x4ea,0x540,0x596,0x5ec,0x642,0x698,0x6ee,0x744,0x79a,0x7f0 }, + { 0x037,0x08d,0x0e3,0x139,0x18f,0x1e5,0x23b,0x291,0x2e7,0x33d,0x393,0x3e9,0x43f,0x495,0x4eb,0x541,0x597,0x5ed,0x643,0x699,0x6ef,0x745,0x79b,0x7f1 }, + { 0x038,0x08e,0x0e4,0x13a,0x190,0x1e6,0x23c,0x292,0x2e8,0x33e,0x394,0x3ea,0x440,0x496,0x4ec,0x542,0x598,0x5ee,0x644,0x69a,0x6f0,0x746,0x79c,0x7f2 }, + { 0x039,0x08f,0x0e5,0x13b,0x191,0x1e7,0x23d,0x293,0x2e9,0x33f,0x395,0x3eb,0x441,0x497,0x4ed,0x543,0x599,0x5ef,0x645,0x69b,0x6f1,0x747,0x79d,0x7f3 }, + { 0x03a,0x090,0x0e6,0x13c,0x192,0x1e8,0x23e,0x294,0x2ea,0x340,0x396,0x3ec,0x442,0x498,0x4ee,0x544,0x59a,0x5f0,0x646,0x69c,0x6f2,0x748,0x79e,0x7f4 }, + { 0x03b,0x091,0x0e7,0x13d,0x193,0x1e9,0x23f,0x295,0x2eb,0x341,0x397,0x3ed,0x443,0x499,0x4ef,0x545,0x59b,0x5f1,0x647,0x69d,0x6f3,0x749,0x79f,0x7f5 }, + { 0x03c,0x092,0x0e8,0x13e,0x194,0x1ea,0x240,0x296,0x2ec,0x342,0x398,0x3ee,0x444,0x49a,0x4f0,0x546,0x59c,0x5f2,0x648,0x69e,0x6f4,0x74a,0x7a0,0x7f6 }, + { 0x03d,0x093,0x0e9,0x13f,0x195,0x1eb,0x241,0x297,0x2ed,0x343,0x399,0x3ef,0x445,0x49b,0x4f1,0x547,0x59d,0x5f3,0x649,0x69f,0x6f5,0x74b,0x7a1,0x7f7 }, + { 0x03e,0x094,0x0ea,0x140,0x196,0x1ec,0x242,0x298,0x2ee,0x344,0x39a,0x3f0,0x446,0x49c,0x4f2,0x548,0x59e,0x5f4,0x64a,0x6a0,0x6f6,0x74c,0x7a2,0x7f8 }, + { 0x03f,0x095,0x0eb,0x141,0x197,0x1ed,0x243,0x299,0x2ef,0x345,0x39b,0x3f1,0x447,0x49d,0x4f3,0x549,0x59f,0x5f5,0x64b,0x6a1,0x6f7,0x74d,0x7a3,0x7f9 }, + { 0x040,0x096,0x0ec,0x142,0x198,0x1ee,0x244,0x29a,0x2f0,0x346,0x39c,0x3f2,0x448,0x49e,0x4f4,0x54a,0x5a0,0x5f6,0x64c,0x6a2,0x6f8,0x74e,0x7a4,0x7fa }, + { 0x041,0x097,0x0ed,0x143,0x199,0x1ef,0x245,0x29b,0x2f1,0x347,0x39d,0x3f3,0x449,0x49f,0x4f5,0x54b,0x5a1,0x5f7,0x64d,0x6a3,0x6f9,0x74f,0x7a5,0x7fb }, + { 0x042,0x098,0x0ee,0x144,0x19a,0x1f0,0x246,0x29c,0x2f2,0x348,0x39e,0x3f4,0x44a,0x4a0,0x4f6,0x54c,0x5a2,0x5f8,0x64e,0x6a4,0x6fa,0x750,0x7a6,0x7fc }, + { 0x043,0x099,0x0ef,0x145,0x19b,0x1f1,0x247,0x29d,0x2f3,0x349,0x39f,0x3f5,0x44b,0x4a1,0x4f7,0x54d,0x5a3,0x5f9,0x64f,0x6a5,0x6fb,0x751,0x7a7,0x7fd }, + { 0x044,0x09a,0x0f0,0x146,0x19c,0x1f2,0x248,0x29e,0x2f4,0x34a,0x3a0,0x3f6,0x44c,0x4a2,0x4f8,0x54e,0x5a4,0x5fa,0x650,0x6a6,0x6fc,0x752,0x7a8,0x7fe }, + { 0x045,0x09b,0x0f1,0x147,0x19d,0x1f3,0x249,0x29f,0x2f5,0x34b,0x3a1,0x3f7,0x44d,0x4a3,0x4f9,0x54f,0x5a5,0x5fb,0x651,0x6a7,0x6fd,0x753,0x7a9,0x7ff }, + { 0x046,0x09c,0x0f2,0x148,0x19e,0x1f4,0x24a,0x2a0,0x2f6,0x34c,0x3a2,0x3f8,0x44e,0x4a4,0x4fa,0x550,0x5a6,0x5fc,0x652,0x6a8,0x6fe,0x754,0x7aa,0x800 }, + { 0x047,0x09d,0x0f3,0x149,0x19f,0x1f5,0x24b,0x2a1,0x2f7,0x34d,0x3a3,0x3f9,0x44f,0x4a5,0x4fb,0x551,0x5a7,0x5fd,0x653,0x6a9,0x6ff,0x755,0x7ab,0x801 }, + { 0x048,0x09e,0x0f4,0x14a,0x1a0,0x1f6,0x24c,0x2a2,0x2f8,0x34e,0x3a4,0x3fa,0x450,0x4a6,0x4fc,0x552,0x5a8,0x5fe,0x654,0x6aa,0x700,0x756,0x7ac,0x802 }, + { 0x049,0x09f,0x0f5,0x14b,0x1a1,0x1f7,0x24d,0x2a3,0x2f9,0x34f,0x3a5,0x3fb,0x451,0x4a7,0x4fd,0x553,0x5a9,0x5ff,0x655,0x6ab,0x701,0x757,0x7ad,0x803 }, + { 0x04a,0x0a0,0x0f6,0x14c,0x1a2,0x1f8,0x24e,0x2a4,0x2fa,0x350,0x3a6,0x3fc,0x452,0x4a8,0x4fe,0x554,0x5aa,0x600,0x656,0x6ac,0x702,0x758,0x7ae,0x804 }, + { 0x04b,0x0a1,0x0f7,0x14d,0x1a3,0x1f9,0x24f,0x2a5,0x2fb,0x351,0x3a7,0x3fd,0x453,0x4a9,0x4ff,0x555,0x5ab,0x601,0x657,0x6ad,0x703,0x759,0x7af,0x805 }, + { 0x04c,0x0a2,0x0f8,0x14e,0x1a4,0x1fa,0x250,0x2a6,0x2fc,0x352,0x3a8,0x3fe,0x454,0x4aa,0x500,0x556,0x5ac,0x602,0x658,0x6ae,0x704,0x75a,0x7b0,0x806 }, + { 0x04d,0x0a3,0x0f9,0x14f,0x1a5,0x1fb,0x251,0x2a7,0x2fd,0x353,0x3a9,0x3ff,0x455,0x4ab,0x501,0x557,0x5ad,0x603,0x659,0x6af,0x705,0x75b,0x7b1,0x807 }, + { 0x04e,0x0a4,0x0fa,0x150,0x1a6,0x1fc,0x252,0x2a8,0x2fe,0x354,0x3aa,0x400,0x456,0x4ac,0x502,0x558,0x5ae,0x604,0x65a,0x6b0,0x706,0x75c,0x7b2,0x808 }, + { 0x04f,0x0a5,0x0fb,0x151,0x1a7,0x1fd,0x253,0x2a9,0x2ff,0x355,0x3ab,0x401,0x457,0x4ad,0x503,0x559,0x5af,0x605,0x65b,0x6b1,0x707,0x75d,0x7b3,0x809 }, + { 0x050,0x0a6,0x0fc,0x152,0x1a8,0x1fe,0x254,0x2aa,0x300,0x356,0x3ac,0x402,0x458,0x4ae,0x504,0x55a,0x5b0,0x606,0x65c,0x6b2,0x708,0x75e,0x7b4,0x80a }, + { 0x051,0x0a7,0x0fd,0x153,0x1a9,0x1ff,0x255,0x2ab,0x301,0x357,0x3ad,0x403,0x459,0x4af,0x505,0x55b,0x5b1,0x607,0x65d,0x6b3,0x709,0x75f,0x7b5,0x80b }, + { 0x052,0x0a8,0x0fe,0x154,0x1aa,0x200,0x256,0x2ac,0x302,0x358,0x3ae,0x404,0x45a,0x4b0,0x506,0x55c,0x5b2,0x608,0x65e,0x6b4,0x70a,0x760,0x7b6,0x80c }, + { 0x053,0x0a9,0x0ff,0x155,0x1ab,0x201,0x257,0x2ad,0x303,0x359,0x3af,0x405,0x45b,0x4b1,0x507,0x55d,0x5b3,0x609,0x65f,0x6b5,0x70b,0x761,0x7b7,0x80d }, + { 0x054,0x0aa,0x100,0x156,0x1ac,0x202,0x258,0x2ae,0x304,0x35a,0x3b0,0x406,0x45c,0x4b2,0x508,0x55e,0x5b4,0x60a,0x660,0x6b6,0x70c,0x762,0x7b8,0x80e }, + { 0x055,0x0ab,0x101,0x157,0x1ad,0x203,0x259,0x2af,0x305,0x35b,0x3b1,0x407,0x45d,0x4b3,0x509,0x55f,0x5b5,0x60b,0x661,0x6b7,0x70d,0x763,0x7b9,0x80f } +}; + +/** + * @brief ------------------------------------------------- + * qoffsets - each row represents the addresses used to calculate a byte of the ECC Q + * data 52 (*2) ECC Q bytes, 43 values represented by each + * -------------------------------------------------. + */ + +static const uint16_t qoffsets[ECC_Q_NUM_BYTES][ECC_Q_COMP] = +{ + { 0x000,0x058,0x0b0,0x108,0x160,0x1b8,0x210,0x268,0x2c0,0x318,0x370,0x3c8,0x420,0x478,0x4d0,0x528,0x580,0x5d8,0x630,0x688,0x6e0,0x738,0x790,0x7e8,0x840,0x898,0x034,0x08c,0x0e4,0x13c,0x194,0x1ec,0x244,0x29c,0x2f4,0x34c,0x3a4,0x3fc,0x454,0x4ac,0x504,0x55c,0x5b4 }, + { 0x001,0x059,0x0b1,0x109,0x161,0x1b9,0x211,0x269,0x2c1,0x319,0x371,0x3c9,0x421,0x479,0x4d1,0x529,0x581,0x5d9,0x631,0x689,0x6e1,0x739,0x791,0x7e9,0x841,0x899,0x035,0x08d,0x0e5,0x13d,0x195,0x1ed,0x245,0x29d,0x2f5,0x34d,0x3a5,0x3fd,0x455,0x4ad,0x505,0x55d,0x5b5 }, + { 0x056,0x0ae,0x106,0x15e,0x1b6,0x20e,0x266,0x2be,0x316,0x36e,0x3c6,0x41e,0x476,0x4ce,0x526,0x57e,0x5d6,0x62e,0x686,0x6de,0x736,0x78e,0x7e6,0x83e,0x896,0x032,0x08a,0x0e2,0x13a,0x192,0x1ea,0x242,0x29a,0x2f2,0x34a,0x3a2,0x3fa,0x452,0x4aa,0x502,0x55a,0x5b2,0x60a }, + { 0x057,0x0af,0x107,0x15f,0x1b7,0x20f,0x267,0x2bf,0x317,0x36f,0x3c7,0x41f,0x477,0x4cf,0x527,0x57f,0x5d7,0x62f,0x687,0x6df,0x737,0x78f,0x7e7,0x83f,0x897,0x033,0x08b,0x0e3,0x13b,0x193,0x1eb,0x243,0x29b,0x2f3,0x34b,0x3a3,0x3fb,0x453,0x4ab,0x503,0x55b,0x5b3,0x60b }, + { 0x0ac,0x104,0x15c,0x1b4,0x20c,0x264,0x2bc,0x314,0x36c,0x3c4,0x41c,0x474,0x4cc,0x524,0x57c,0x5d4,0x62c,0x684,0x6dc,0x734,0x78c,0x7e4,0x83c,0x894,0x030,0x088,0x0e0,0x138,0x190,0x1e8,0x240,0x298,0x2f0,0x348,0x3a0,0x3f8,0x450,0x4a8,0x500,0x558,0x5b0,0x608,0x660 }, + { 0x0ad,0x105,0x15d,0x1b5,0x20d,0x265,0x2bd,0x315,0x36d,0x3c5,0x41d,0x475,0x4cd,0x525,0x57d,0x5d5,0x62d,0x685,0x6dd,0x735,0x78d,0x7e5,0x83d,0x895,0x031,0x089,0x0e1,0x139,0x191,0x1e9,0x241,0x299,0x2f1,0x349,0x3a1,0x3f9,0x451,0x4a9,0x501,0x559,0x5b1,0x609,0x661 }, + { 0x102,0x15a,0x1b2,0x20a,0x262,0x2ba,0x312,0x36a,0x3c2,0x41a,0x472,0x4ca,0x522,0x57a,0x5d2,0x62a,0x682,0x6da,0x732,0x78a,0x7e2,0x83a,0x892,0x02e,0x086,0x0de,0x136,0x18e,0x1e6,0x23e,0x296,0x2ee,0x346,0x39e,0x3f6,0x44e,0x4a6,0x4fe,0x556,0x5ae,0x606,0x65e,0x6b6 }, + { 0x103,0x15b,0x1b3,0x20b,0x263,0x2bb,0x313,0x36b,0x3c3,0x41b,0x473,0x4cb,0x523,0x57b,0x5d3,0x62b,0x683,0x6db,0x733,0x78b,0x7e3,0x83b,0x893,0x02f,0x087,0x0df,0x137,0x18f,0x1e7,0x23f,0x297,0x2ef,0x347,0x39f,0x3f7,0x44f,0x4a7,0x4ff,0x557,0x5af,0x607,0x65f,0x6b7 }, + { 0x158,0x1b0,0x208,0x260,0x2b8,0x310,0x368,0x3c0,0x418,0x470,0x4c8,0x520,0x578,0x5d0,0x628,0x680,0x6d8,0x730,0x788,0x7e0,0x838,0x890,0x02c,0x084,0x0dc,0x134,0x18c,0x1e4,0x23c,0x294,0x2ec,0x344,0x39c,0x3f4,0x44c,0x4a4,0x4fc,0x554,0x5ac,0x604,0x65c,0x6b4,0x70c }, + { 0x159,0x1b1,0x209,0x261,0x2b9,0x311,0x369,0x3c1,0x419,0x471,0x4c9,0x521,0x579,0x5d1,0x629,0x681,0x6d9,0x731,0x789,0x7e1,0x839,0x891,0x02d,0x085,0x0dd,0x135,0x18d,0x1e5,0x23d,0x295,0x2ed,0x345,0x39d,0x3f5,0x44d,0x4a5,0x4fd,0x555,0x5ad,0x605,0x65d,0x6b5,0x70d }, + { 0x1ae,0x206,0x25e,0x2b6,0x30e,0x366,0x3be,0x416,0x46e,0x4c6,0x51e,0x576,0x5ce,0x626,0x67e,0x6d6,0x72e,0x786,0x7de,0x836,0x88e,0x02a,0x082,0x0da,0x132,0x18a,0x1e2,0x23a,0x292,0x2ea,0x342,0x39a,0x3f2,0x44a,0x4a2,0x4fa,0x552,0x5aa,0x602,0x65a,0x6b2,0x70a,0x762 }, + { 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0x7bb,0x813,0x86b,0x007,0x05f,0x0b7,0x10f,0x167,0x1bf,0x217,0x26f,0x2c7,0x31f,0x377,0x3cf,0x427,0x47f,0x4d7,0x52f,0x587,0x5df,0x637,0x68f,0x6e7,0x73f,0x797,0x7ef,0x847,0x89f,0x03b,0x093,0x0eb,0x143,0x19b,0x1f3,0x24b,0x2a3,0x2fb,0x353,0x3ab,0x403,0x45b,0x4b3 }, + { 0x810,0x868,0x004,0x05c,0x0b4,0x10c,0x164,0x1bc,0x214,0x26c,0x2c4,0x31c,0x374,0x3cc,0x424,0x47c,0x4d4,0x52c,0x584,0x5dc,0x634,0x68c,0x6e4,0x73c,0x794,0x7ec,0x844,0x89c,0x038,0x090,0x0e8,0x140,0x198,0x1f0,0x248,0x2a0,0x2f8,0x350,0x3a8,0x400,0x458,0x4b0,0x508 }, + { 0x811,0x869,0x005,0x05d,0x0b5,0x10d,0x165,0x1bd,0x215,0x26d,0x2c5,0x31d,0x375,0x3cd,0x425,0x47d,0x4d5,0x52d,0x585,0x5dd,0x635,0x68d,0x6e5,0x73d,0x795,0x7ed,0x845,0x89d,0x039,0x091,0x0e9,0x141,0x199,0x1f1,0x249,0x2a1,0x2f9,0x351,0x3a9,0x401,0x459,0x4b1,0x509 }, + { 0x866,0x002,0x05a,0x0b2,0x10a,0x162,0x1ba,0x212,0x26a,0x2c2,0x31a,0x372,0x3ca,0x422,0x47a,0x4d2,0x52a,0x582,0x5da,0x632,0x68a,0x6e2,0x73a,0x792,0x7ea,0x842,0x89a,0x036,0x08e,0x0e6,0x13e,0x196,0x1ee,0x246,0x29e,0x2f6,0x34e,0x3a6,0x3fe,0x456,0x4ae,0x506,0x55e }, + { 0x867,0x003,0x05b,0x0b3,0x10b,0x163,0x1bb,0x213,0x26b,0x2c3,0x31b,0x373,0x3cb,0x423,0x47b,0x4d3,0x52b,0x583,0x5db,0x633,0x68b,0x6e3,0x73b,0x793,0x7eb,0x843,0x89b,0x037,0x08f,0x0e7,0x13f,0x197,0x1ef,0x247,0x29f,0x2f7,0x34f,0x3a7,0x3ff,0x457,0x4af,0x507,0x55f } +}; + +/*------------------------------------------------- + * ecc_source_byte - return data from the sector + * at the given offset, masking anything + * particular to a mode + *------------------------------------------------- + */ + +static inline uint8_t ecc_source_byte(const uint8_t *sector, uint32_t offset) +{ + /* in mode 2 always treat these as 0 bytes */ + return (sector[MODE_OFFSET] == 2 && offset < 4) ? 0x00 : sector[SYNC_OFFSET + SYNC_NUM_BYTES + offset]; +} + +/** + * @fn void ecc_compute_bytes(const uint8_t *sector, const uint16_t *row, int rowlen, uint8_t &val1, uint8_t &val2) + * + * @brief ------------------------------------------------- + * ecc_compute_bytes - calculate an ECC value (P or Q) + * -------------------------------------------------. + * + * @param sector The sector. + * @param row The row. + * @param rowlen The rowlen. + * @param [in,out] val1 The first value. + * @param [in,out] val2 The second value. + */ + +void ecc_compute_bytes(const uint8_t *sector, const uint16_t *row, int rowlen, uint8_t *val1, uint8_t *val2) +{ + int component; + *val1 = *val2 = 0; + for (component = 0; component < rowlen; component++) + { + *val1 ^= ecc_source_byte(sector, row[component]); + *val2 ^= ecc_source_byte(sector, row[component]); + *val1 = ecclow[*val1]; + } + *val1 = ecchigh[ecclow[*val1] ^ *val2]; + *val2 ^= *val1; +} + +/** + * @fn int ecc_verify(const uint8_t *sector) + * + * @brief ------------------------------------------------- + * ecc_verify - verify the P and Q ECC codes in a sector + * -------------------------------------------------. + * + * @param sector The sector. + * + * @return true if it succeeds, false if it fails. + */ + +int ecc_verify(const uint8_t *sector) +{ + int byte; + /* first verify P bytes */ + for (byte = 0; byte < ECC_P_NUM_BYTES; byte++) + { + uint8_t val1, val2; + ecc_compute_bytes(sector, poffsets[byte], ECC_P_COMP, &val1, &val2); + if (sector[ECC_P_OFFSET + byte] != val1 || sector[ECC_P_OFFSET + ECC_P_NUM_BYTES + byte] != val2) + return 0; + } + + /* then verify Q bytes */ + for (byte = 0; byte < ECC_Q_NUM_BYTES; byte++) + { + uint8_t val1, val2; + ecc_compute_bytes(sector, qoffsets[byte], ECC_Q_COMP, &val1, &val2); + if (sector[ECC_Q_OFFSET + byte] != val1 || sector[ECC_Q_OFFSET + ECC_Q_NUM_BYTES + byte] != val2) + return 0; + } + return 1; +} + +/** + * @fn void ecc_generate(uint8_t *sector) + * + * @brief ------------------------------------------------- + * ecc_generate - generate the P and Q ECC codes for a sector, overwriting any + * existing codes + * -------------------------------------------------. + * + * @param [in,out] sector If non-null, the sector. + */ + +void ecc_generate(uint8_t *sector) +{ + int byte; + /* first verify P bytes */ + for (byte = 0; byte < ECC_P_NUM_BYTES; byte++) + ecc_compute_bytes(sector, poffsets[byte], ECC_P_COMP, §or[ECC_P_OFFSET + byte], §or[ECC_P_OFFSET + ECC_P_NUM_BYTES + byte]); + + /* then verify Q bytes */ + for (byte = 0; byte < ECC_Q_NUM_BYTES; byte++) + ecc_compute_bytes(sector, qoffsets[byte], ECC_Q_COMP, §or[ECC_Q_OFFSET + byte], §or[ECC_Q_OFFSET + ECC_Q_NUM_BYTES + byte]); +} + +/** + * @fn void ecc_clear(uint8_t *sector) + * + * @brief ------------------------------------------------- + * ecc_clear - erase the ECC P and Q cods to 0 within a sector + * -------------------------------------------------. + * + * @param [in,out] sector If non-null, the sector. + */ + +void ecc_clear(uint8_t *sector) +{ + memset(§or[ECC_P_OFFSET], 0, 2 * ECC_P_NUM_BYTES); + memset(§or[ECC_Q_OFFSET], 0, 2 * ECC_Q_NUM_BYTES); +} diff --git a/deps/libchdr/cdrom.h b/deps/libchdr/cdrom.h index 8a3341c..65aa182 100644 --- a/deps/libchdr/cdrom.h +++ b/deps/libchdr/cdrom.h @@ -1,107 +1,109 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - cdrom.h - - Generic MAME cd-rom implementation - -***************************************************************************/ - -#pragma once - -#ifndef __CDROM_H__ -#define __CDROM_H__ - -#include - - -/*************************************************************************** - CONSTANTS -***************************************************************************/ - -// tracks are padded to a multiple of this many frames -extern const uint32_t CD_TRACK_PADDING; - -#define CD_MAX_TRACKS (99) /* AFAIK the theoretical limit */ -#define CD_MAX_SECTOR_DATA (2352) -#define CD_MAX_SUBCODE_DATA (96) - -#define CD_FRAME_SIZE (CD_MAX_SECTOR_DATA + CD_MAX_SUBCODE_DATA) -#define CD_FRAMES_PER_HUNK (8) - -#define CD_METADATA_WORDS (1+(CD_MAX_TRACKS * 6)) - -enum -{ - CD_TRACK_MODE1 = 0, /* mode 1 2048 bytes/sector */ - CD_TRACK_MODE1_RAW, /* mode 1 2352 bytes/sector */ - CD_TRACK_MODE2, /* mode 2 2336 bytes/sector */ - CD_TRACK_MODE2_FORM1, /* mode 2 2048 bytes/sector */ - CD_TRACK_MODE2_FORM2, /* mode 2 2324 bytes/sector */ - CD_TRACK_MODE2_FORM_MIX, /* mode 2 2336 bytes/sector */ - CD_TRACK_MODE2_RAW, /* mode 2 2352 bytes / sector */ - CD_TRACK_AUDIO, /* redbook audio track 2352 bytes/sector (588 samples) */ - - CD_TRACK_RAW_DONTCARE /* special flag for cdrom_read_data: just return me whatever is there */ -}; - -enum -{ - CD_SUB_NORMAL = 0, /* "cooked" 96 bytes per sector */ - CD_SUB_RAW, /* raw uninterleaved 96 bytes per sector */ - CD_SUB_NONE /* no subcode data stored */ -}; - -#define CD_FLAG_GDROM 0x00000001 // disc is a GD-ROM, all tracks should be stored with GD-ROM metadata -#define CD_FLAG_GDROMLE 0x00000002 // legacy GD-ROM, with little-endian CDDA data - -/*************************************************************************** - FUNCTION PROTOTYPES -***************************************************************************/ - -// ECC utilities -int ecc_verify(const uint8_t *sector); -void ecc_generate(uint8_t *sector); -void ecc_clear(uint8_t *sector); - - - -/*************************************************************************** - INLINE FUNCTIONS -***************************************************************************/ - -static inline uint32_t msf_to_lba(uint32_t msf) -{ - return ( ((msf&0x00ff0000)>>16) * 60 * 75) + (((msf&0x0000ff00)>>8) * 75) + ((msf&0x000000ff)>>0); -} - -static inline uint32_t lba_to_msf(uint32_t lba) -{ - uint8_t m, s, f; - - m = lba / (60 * 75); - lba -= m * (60 * 75); - s = lba / 75; - f = lba % 75; - - return ((m / 10) << 20) | ((m % 10) << 16) | - ((s / 10) << 12) | ((s % 10) << 8) | - ((f / 10) << 4) | ((f % 10) << 0); -} - -// segacd needs it like this.. investigate -// Angelo also says PCE tracks often start playing at the -// wrong address.. related? -static inline uint32_t lba_to_msf_alt(int lba) -{ - uint32_t ret = 0; - - ret |= ((lba / (60 * 75))&0xff)<<16; - ret |= (((lba / 75) % 60)&0xff)<<8; - ret |= ((lba % 75)&0xff)<<0; - - return ret; -} - -#endif // __CDROM_H__ +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +*************************************************************************** + + cdrom.h + + Generic MAME cd-rom implementation + +***************************************************************************/ + +#pragma once + +#ifndef __CDROM_H__ +#define __CDROM_H__ + +#include + + +/*************************************************************************** + CONSTANTS +***************************************************************************/ + +/* tracks are padded to a multiple of this many frames */ +extern const uint32_t CD_TRACK_PADDING; + +#define CD_MAX_TRACKS (99) /* AFAIK the theoretical limit */ +#define CD_MAX_SECTOR_DATA (2352) +#define CD_MAX_SUBCODE_DATA (96) + +#define CD_FRAME_SIZE (CD_MAX_SECTOR_DATA + CD_MAX_SUBCODE_DATA) +#define CD_FRAMES_PER_HUNK (8) + +#define CD_METADATA_WORDS (1+(CD_MAX_TRACKS * 6)) + +enum +{ + CD_TRACK_MODE1 = 0, /* mode 1 2048 bytes/sector */ + CD_TRACK_MODE1_RAW, /* mode 1 2352 bytes/sector */ + CD_TRACK_MODE2, /* mode 2 2336 bytes/sector */ + CD_TRACK_MODE2_FORM1, /* mode 2 2048 bytes/sector */ + CD_TRACK_MODE2_FORM2, /* mode 2 2324 bytes/sector */ + CD_TRACK_MODE2_FORM_MIX, /* mode 2 2336 bytes/sector */ + CD_TRACK_MODE2_RAW, /* mode 2 2352 bytes / sector */ + CD_TRACK_AUDIO, /* redbook audio track 2352 bytes/sector (588 samples) */ + + CD_TRACK_RAW_DONTCARE /* special flag for cdrom_read_data: just return me whatever is there */ +}; + +enum +{ + CD_SUB_NORMAL = 0, /* "cooked" 96 bytes per sector */ + CD_SUB_RAW, /* raw uninterleaved 96 bytes per sector */ + CD_SUB_NONE /* no subcode data stored */ +}; + +#define CD_FLAG_GDROM 0x00000001 /* disc is a GD-ROM, all tracks should be stored with GD-ROM metadata */ +#define CD_FLAG_GDROMLE 0x00000002 /* legacy GD-ROM, with little-endian CDDA data */ + +/*************************************************************************** + FUNCTION PROTOTYPES +***************************************************************************/ + +/* ECC utilities */ +int ecc_verify(const uint8_t *sector); +void ecc_generate(uint8_t *sector); +void ecc_clear(uint8_t *sector); + + + +/*************************************************************************** + INLINE FUNCTIONS +***************************************************************************/ + +static inline uint32_t msf_to_lba(uint32_t msf) +{ + return ( ((msf&0x00ff0000)>>16) * 60 * 75) + (((msf&0x0000ff00)>>8) * 75) + ((msf&0x000000ff)>>0); +} + +static inline uint32_t lba_to_msf(uint32_t lba) +{ + uint8_t m, s, f; + + m = lba / (60 * 75); + lba -= m * (60 * 75); + s = lba / 75; + f = lba % 75; + + return ((m / 10) << 20) | ((m % 10) << 16) | + ((s / 10) << 12) | ((s % 10) << 8) | + ((f / 10) << 4) | ((f % 10) << 0); +} + +/** + * segacd needs it like this.. investigate + * Angelo also says PCE tracks often start playing at the + * wrong address.. related? + **/ +static inline uint32_t lba_to_msf_alt(int lba) +{ + uint32_t ret = 0; + + ret |= ((lba / (60 * 75))&0xff)<<16; + ret |= (((lba / 75) % 60)&0xff)<<8; + ret |= ((lba % 75)&0xff)<<0; + + return ret; +} + +#endif /* __CDROM_H__ */ diff --git a/deps/libchdr/chd.c b/deps/libchdr/chd.c index bf6d342..096ba9e 100644 --- a/deps/libchdr/chd.c +++ b/deps/libchdr/chd.c @@ -36,28 +36,21 @@ POSSIBILITY OF SUCH DAMAGE. ***************************************************************************/ -#define DONT_SET_BYTE -typedef unsigned char Byte; +#include +#include +#include +#include +#include #include "chd.h" #include "cdrom.h" -#include "huffman.h" #include "flac.h" - -#include "md5.h" -#include "sha1.h" +#include "huffman.h" #include "LzmaEnc.h" #include "LzmaDec.h" - -#include -#include - -#include -#include -#include -#include - -#include "../deps/crypto/md5.h" +#include "md5.h" +#include "sha1.h" +#include "zlib.h" #define TRUE 1 #define FALSE 0 @@ -67,16 +60,12 @@ typedef unsigned char Byte; #define SHA1_DIGEST_SIZE 20 -#define CHD_MAKE_TAG(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) - /*************************************************************************** DEBUGGING ***************************************************************************/ #define PRINTF_MAX_HUNK (0) - - /*************************************************************************** CONSTANTS ***************************************************************************/ @@ -101,63 +90,60 @@ typedef unsigned char Byte; static const uint8_t s_cd_sync_header[12] = { 0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00 }; -// V3-V4 entry types +/* V3-V4 entry types */ enum { - V34_MAP_ENTRY_TYPE_INVALID = 0, // invalid type - V34_MAP_ENTRY_TYPE_COMPRESSED = 1, // standard compression - V34_MAP_ENTRY_TYPE_UNCOMPRESSED = 2, // uncompressed data - V34_MAP_ENTRY_TYPE_MINI = 3, // mini: use offset as raw data - V34_MAP_ENTRY_TYPE_SELF_HUNK = 4, // same as another hunk in this file - V34_MAP_ENTRY_TYPE_PARENT_HUNK = 5, // same as a hunk in the parent file - V34_MAP_ENTRY_TYPE_2ND_COMPRESSED = 6 // compressed with secondary algorithm (usually FLAC CDDA) + V34_MAP_ENTRY_TYPE_INVALID = 0, /* invalid type */ + V34_MAP_ENTRY_TYPE_COMPRESSED = 1, /* standard compression */ + V34_MAP_ENTRY_TYPE_UNCOMPRESSED = 2, /* uncompressed data */ + V34_MAP_ENTRY_TYPE_MINI = 3, /* mini: use offset as raw data */ + V34_MAP_ENTRY_TYPE_SELF_HUNK = 4, /* same as another hunk in this file */ + V34_MAP_ENTRY_TYPE_PARENT_HUNK = 5, /* same as a hunk in the parent file */ + V34_MAP_ENTRY_TYPE_2ND_COMPRESSED = 6 /* compressed with secondary algorithm (usually FLAC CDDA) */ }; -// V5 compression types +/* V5 compression types */ enum { - ///< codec #0 - // these types are live when running + /* codec #0 + * these types are live when running */ COMPRESSION_TYPE_0 = 0, - ///< codec #1 + /* codec #1 */ COMPRESSION_TYPE_1 = 1, - ///< codec #2 + /* codec #2 */ COMPRESSION_TYPE_2 = 2, - ///< codec #3 + /* codec #3 */ COMPRESSION_TYPE_3 = 3, - ///< no compression; implicit length = hunkbytes + /* no compression; implicit length = hunkbytes */ COMPRESSION_NONE = 4, - ///< same as another block in this chd + /* same as another block in this chd */ COMPRESSION_SELF = 5, - ///< same as a hunk's worth of units in the parent chd + /* same as a hunk's worth of units in the parent chd */ COMPRESSION_PARENT = 6, - ///< start of small RLE run (4-bit length) - // these additional pseudo-types are used for compressed encodings: + /* start of small RLE run (4-bit length) + * these additional pseudo-types are used for compressed encodings: */ COMPRESSION_RLE_SMALL, - ///< start of large RLE run (8-bit length) + /* start of large RLE run (8-bit length) */ COMPRESSION_RLE_LARGE, - ///< same as the last COMPRESSION_SELF block + /* same as the last COMPRESSION_SELF block */ COMPRESSION_SELF_0, - ///< same as the last COMPRESSION_SELF block + 1 + /* same as the last COMPRESSION_SELF block + 1 */ COMPRESSION_SELF_1, - ///< same block in the parent + /* same block in the parent */ COMPRESSION_PARENT_SELF, - ///< same as the last COMPRESSION_PARENT block + /* same as the last COMPRESSION_PARENT block */ COMPRESSION_PARENT_0, - ///< same as the last COMPRESSION_PARENT block + 1 + /* same as the last COMPRESSION_PARENT block + 1 */ COMPRESSION_PARENT_1 }; - /*************************************************************************** MACROS ***************************************************************************/ #define EARLY_EXIT(x) do { (void)(x); goto cleanup; } while (0) - - /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ @@ -175,7 +161,6 @@ struct _codec_interface chd_error (*config)(void *codec, int param, void *config); /* configure */ }; - /* a single map entry */ typedef struct _map_entry map_entry; struct _map_entry @@ -186,7 +171,6 @@ struct _map_entry UINT8 flags; /* misc flags */ }; - /* simple linked-list of hunks used for our CRC map */ typedef struct _crcmap_entry crcmap_entry; struct _crcmap_entry @@ -195,7 +179,6 @@ struct _crcmap_entry crcmap_entry * next; /* next entry in list */ }; - /* a single metadata entry */ typedef struct _metadata_entry metadata_entry; struct _metadata_entry @@ -236,7 +219,7 @@ struct _lzma_allocator }; typedef struct _lzma_codec_data lzma_codec_data; -struct _lzma_codec_data +struct _lzma_codec_data { CLzmaDec decoder; lzma_allocator allocator; @@ -245,7 +228,7 @@ struct _lzma_codec_data /* codec-private data for the CDZL codec */ typedef struct _cdzl_codec_data cdzl_codec_data; struct _cdzl_codec_data { - // internal state + /* internal state */ zlib_codec_data base_decompressor; zlib_codec_data subcode_decompressor; uint8_t* buffer; @@ -254,7 +237,7 @@ struct _cdzl_codec_data { /* codec-private data for the CDLZ codec */ typedef struct _cdlz_codec_data cdlz_codec_data; struct _cdlz_codec_data { - // internal state + /* internal state */ lzma_codec_data base_decompressor; zlib_codec_data subcode_decompressor; uint8_t* buffer; @@ -263,7 +246,7 @@ struct _cdlz_codec_data { /* codec-private data for the CDFL codec */ typedef struct _cdfl_codec_data cdfl_codec_data; struct _cdfl_codec_data { - // internal state + /* internal state */ int swap_endian; flac_decoder decoder; z_stream inflater; @@ -317,10 +300,9 @@ struct _chd_file UINT32 async_hunknum; /* hunk index for asynchronous operations */ void * async_buffer; /* buffer pointer for asynchronous operations */ - UINT8 * file_cache; /* cache of underlying file */ + UINT8 * file_cache; /* cache of underlying file */ }; - /* a single metadata hash entry */ typedef struct _metadata_hash metadata_hash; struct _metadata_hash @@ -329,8 +311,6 @@ struct _metadata_hash UINT8 sha1[CHD_SHA1_BYTES]; /* hash */ }; - - /*************************************************************************** GLOBAL VARIABLES ***************************************************************************/ @@ -338,16 +318,13 @@ struct _metadata_hash static const UINT8 nullmd5[CHD_MD5_BYTES] = { 0 }; static const UINT8 nullsha1[CHD_SHA1_BYTES] = { 0 }; - - /*************************************************************************** PROTOTYPES ***************************************************************************/ /* internal header operations */ static chd_error header_validate(const chd_header *header); -static chd_error header_read(core_file *file, chd_header *header); - +static chd_error header_read(chd_file *chd, chd_header *header); /* internal hunk read/write */ static chd_error hunk_read_into_cache(chd_file *chd, UINT32 hunknum); @@ -359,7 +336,6 @@ static chd_error map_read(chd_file *chd); /* metadata management */ static chd_error metadata_find_entry(chd_file *chd, UINT32 metatag, UINT32 metaindex, metadata_entry *metaentry); - /* zlib compression codec */ static chd_error zlib_codec_init(void *codec, uint32_t hunkbytes); static void zlib_codec_free(void *codec); @@ -387,75 +363,76 @@ static chd_error cdfl_codec_init(void* codec, uint32_t hunkbytes); static void cdfl_codec_free(void* codec); static chd_error cdfl_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen); -//************************************************************************** -// LZMA ALLOCATOR HELPER -//************************************************************************** +/*************************************************************************** + * LZMA ALLOCATOR HELPER + *************************************************************************** + */ void *lzma_fast_alloc(void *p, size_t size); void lzma_fast_free(void *p, void *address); -//------------------------------------------------- -// lzma_allocator_init -//------------------------------------------------- +/*------------------------------------------------- + * lzma_allocator_init + *------------------------------------------------- + */ void lzma_allocator_init(void* p) { lzma_allocator *codec = (lzma_allocator *)(p); - // reset pointer list + /* reset pointer list */ memset(codec->allocptr, 0, sizeof(codec->allocptr)); codec->Alloc = lzma_fast_alloc; codec->Free = lzma_fast_free; } -//------------------------------------------------- -// lzma_allocator_free -//------------------------------------------------- +/*------------------------------------------------- + * lzma_allocator_free + *------------------------------------------------- + */ void lzma_allocator_free(void* p ) { - int i; lzma_allocator *codec = (lzma_allocator *)(p); - // free our memory - for (i = 0 ; i < MAX_LZMA_ALLOCS ; i++) + /* free our memory */ + for (int i = 0 ; i < MAX_LZMA_ALLOCS ; i++) { if (codec->allocptr[i] != NULL) free(codec->allocptr[i]); } } -//------------------------------------------------- -// lzma_fast_alloc - fast malloc for lzma, which -// allocates and frees memory frequently -//------------------------------------------------- +/*------------------------------------------------- + * lzma_fast_alloc - fast malloc for lzma, which + * allocates and frees memory frequently + *------------------------------------------------- + */ void *lzma_fast_alloc(void *p, size_t size) { - int scan; - uint32_t *addr = NULL; lzma_allocator *codec = (lzma_allocator *)(p); - // compute the size, rounding to the nearest 1k + /* compute the size, rounding to the nearest 1k */ size = (size + 0x3ff) & ~0x3ff; - // reuse a hunk if we can - for (scan = 0; scan < MAX_LZMA_ALLOCS; scan++) + /* reuse a hunk if we can */ + for (int scan = 0; scan < MAX_LZMA_ALLOCS; scan++) { uint32_t *ptr = codec->allocptr[scan]; if (ptr != NULL && size == *ptr) { - // set the low bit of the size so we don't match next time + /* set the low bit of the size so we don't match next time */ *ptr |= 1; return ptr + 1; } } - // alloc a new one and put it into the list - addr = (uint32_t *)malloc(sizeof(uint8_t) * (size + sizeof(uint32_t))); + /* alloc a new one and put it into the list */ + uint32_t *addr = (uint32_t *)malloc(sizeof(uint8_t) * size + sizeof(uintptr_t)); if (addr==NULL) return NULL; - for (scan = 0; scan < MAX_LZMA_ALLOCS; scan++) + for (int scan = 0; scan < MAX_LZMA_ALLOCS; scan++) { if (codec->allocptr[scan] == NULL) { @@ -464,76 +441,70 @@ void *lzma_fast_alloc(void *p, size_t size) } } - // set the low bit of the size so we don't match next time + /* set the low bit of the size so we don't match next time */ *addr = size | 1; - return addr + 1; + return addr + (sizeof(uint32_t) == sizeof(uintptr_t) ? 1 : 2); } - -//------------------------------------------------- -// lzma_fast_free - fast free for lzma, which -// allocates and frees memory frequently -//------------------------------------------------- +/*------------------------------------------------- + * lzma_fast_free - fast free for lzma, which + * allocates and frees memory frequently + *------------------------------------------------- + */ void lzma_fast_free(void *p, void *address) { - int scan; - uint32_t *ptr; - lzma_allocator *codec; if (address == NULL) return; - codec = (lzma_allocator *)(p); + lzma_allocator *codec = (lzma_allocator *)(p); - // find the hunk - ptr = (uint32_t *)(address) - 1; - for (scan = 0; scan < MAX_LZMA_ALLOCS; scan++) + /* find the hunk */ + uint32_t *ptr = (uint32_t *)(address) - 1; + for (int scan = 0; scan < MAX_LZMA_ALLOCS; scan++) { if (ptr == codec->allocptr[scan]) { - // clear the low bit of the size to allow matches + /* clear the low bit of the size to allow matches */ *ptr &= ~1; return; } } } -//************************************************************************** -// LZMA DECOMPRESSOR -//************************************************************************** - +/*************************************************************************** + * LZMA DECOMPRESSOR + *************************************************************************** + */ -//------------------------------------------------- -// lzma_codec_init - constructor -//------------------------------------------------- +/*------------------------------------------------- + * lzma_codec_init - constructor + *------------------------------------------------- + */ chd_error lzma_codec_init(void* codec, uint32_t hunkbytes) { - CLzmaEncHandle enc; - CLzmaEncProps encoder_props; - Byte decoder_props[LZMA_PROPS_SIZE]; - SizeT props_size; - lzma_allocator* alloc; lzma_codec_data* lzma_codec = (lzma_codec_data*) codec; - // construct the decoder + /* construct the decoder */ LzmaDec_Construct(&lzma_codec->decoder); - // FIXME: this code is written in a way that makes it impossible to safely upgrade the LZMA SDK - // This code assumes that the current version of the encoder imposes the same requirements on the - // decoder as the encoder used to produce the file. This is not necessarily true. The format - // needs to be changed so the encoder properties are written to the file. + /* FIXME: this code is written in a way that makes it impossible to safely upgrade the LZMA SDK + * This code assumes that the current version of the encoder imposes the same requirements on the + * decoder as the encoder used to produce the file. This is not necessarily true. The format + * needs to be changed so the encoder properties are written to the file. - // configure the properties like the compressor did + * configure the properties like the compressor did */ + CLzmaEncProps encoder_props; LzmaEncProps_Init(&encoder_props); encoder_props.level = 9; encoder_props.reduceSize = hunkbytes; LzmaEncProps_Normalize(&encoder_props); - // convert to decoder properties - alloc = &lzma_codec->allocator; + /* convert to decoder properties */ + lzma_allocator* alloc = &lzma_codec->allocator; lzma_allocator_init(alloc); - enc = LzmaEnc_Create((ISzAlloc*)alloc); + CLzmaEncHandle enc = LzmaEnc_Create((ISzAlloc*)alloc); if (!enc) return CHDERR_DECOMPRESSION_ERROR; if (LzmaEnc_SetProps(enc, &encoder_props) != SZ_OK) @@ -541,7 +512,8 @@ chd_error lzma_codec_init(void* codec, uint32_t hunkbytes) LzmaEnc_Destroy(enc, (ISzAlloc*)&alloc, (ISzAlloc*)&alloc); return CHDERR_DECOMPRESSION_ERROR; } - props_size = sizeof(decoder_props); + Byte decoder_props[LZMA_PROPS_SIZE]; + SizeT props_size = sizeof(decoder_props); if (LzmaEnc_WriteProperties(enc, decoder_props, &props_size) != SZ_OK) { LzmaEnc_Destroy(enc, (ISzAlloc*)alloc, (ISzAlloc*)alloc); @@ -549,60 +521,59 @@ chd_error lzma_codec_init(void* codec, uint32_t hunkbytes) } LzmaEnc_Destroy(enc, (ISzAlloc*)alloc, (ISzAlloc*)alloc); - // do memory allocations + /* do memory allocations */ if (LzmaDec_Allocate(&lzma_codec->decoder, decoder_props, LZMA_PROPS_SIZE, (ISzAlloc*)alloc) != SZ_OK) return CHDERR_DECOMPRESSION_ERROR; - - // Okay + + /* Okay */ return CHDERR_NONE; } - -//------------------------------------------------- -// lzma_codec_free -//------------------------------------------------- +/*------------------------------------------------- + * lzma_codec_free + *------------------------------------------------- + */ void lzma_codec_free(void* codec) { lzma_codec_data* lzma_codec = (lzma_codec_data*) codec; - // free memory + /* free memory */ LzmaDec_Free(&lzma_codec->decoder, (ISzAlloc*)&lzma_codec->allocator); + lzma_allocator_free(&lzma_codec->allocator); } - -//------------------------------------------------- -// decompress - decompress data using the LZMA -// codec -//------------------------------------------------- +/*------------------------------------------------- + * decompress - decompress data using the LZMA + * codec + *------------------------------------------------- + */ chd_error lzma_codec_decompress(void* codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen) { - ELzmaStatus status; - SRes res; - SizeT consumedlen, decodedlen; - // initialize + /* initialize */ lzma_codec_data* lzma_codec = (lzma_codec_data*) codec; LzmaDec_Init(&lzma_codec->decoder); - // decode - consumedlen = complen; - decodedlen = destlen; - res = LzmaDec_DecodeToBuf(&lzma_codec->decoder, dest, &decodedlen, src, &consumedlen, LZMA_FINISH_END, &status); + /* decode */ + SizeT consumedlen = complen; + SizeT decodedlen = destlen; + ELzmaStatus status; + SRes res = LzmaDec_DecodeToBuf(&lzma_codec->decoder, dest, &decodedlen, src, &consumedlen, LZMA_FINISH_END, &status); if ((res != SZ_OK && res != LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK) || consumedlen != complen || decodedlen != destlen) return CHDERR_DECOMPRESSION_ERROR; return CHDERR_NONE; } -// cdlz +/* cdlz */ chd_error cdlz_codec_init(void* codec, uint32_t hunkbytes) { cdlz_codec_data* cdlz = (cdlz_codec_data*) codec; - // allocate buffer + /* allocate buffer */ cdlz->buffer = (uint8_t*)malloc(sizeof(uint8_t) * hunkbytes); - - // make sure the CHD's hunk size is an even multiple of the frame size + + /* make sure the CHD's hunk size is an even multiple of the frame size */ lzma_codec_init(&cdlz->base_decompressor, (hunkbytes / CD_FRAME_SIZE) * CD_MAX_SECTOR_DATA); zlib_codec_init(&cdlz->subcode_decompressor, (hunkbytes / CD_FRAME_SIZE) * CD_MAX_SUBCODE_DATA); @@ -614,39 +585,40 @@ chd_error cdlz_codec_init(void* codec, uint32_t hunkbytes) void cdlz_codec_free(void* codec) { - // TODO + cdlz_codec_data* cdlz = (cdlz_codec_data*) codec; + free(cdlz->buffer); + lzma_codec_free(&cdlz->base_decompressor); + zlib_codec_free(&cdlz->subcode_decompressor); } chd_error cdlz_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen) { - uint32_t framenum; + uint8_t *sector; cdlz_codec_data* cdlz = (cdlz_codec_data*)codec; - // determine header bytes + /* determine header bytes */ uint32_t frames = destlen / CD_FRAME_SIZE; uint32_t complen_bytes = (destlen < 65536) ? 2 : 3; uint32_t ecc_bytes = (frames + 7) / 8; uint32_t header_bytes = ecc_bytes + complen_bytes; - // extract compressed length of base + /* extract compressed length of base */ uint32_t complen_base = (src[ecc_bytes + 0] << 8) | src[ecc_bytes + 1]; if (complen_bytes > 2) complen_base = (complen_base << 8) | src[ecc_bytes + 2]; - // reset and decode + /* reset and decode */ lzma_codec_decompress(&cdlz->base_decompressor, &src[header_bytes], complen_base, &cdlz->buffer[0], frames * CD_MAX_SECTOR_DATA); zlib_codec_decompress(&cdlz->subcode_decompressor, &src[header_bytes + complen_base], complen - complen_base - header_bytes, &cdlz->buffer[frames * CD_MAX_SECTOR_DATA], frames * CD_MAX_SUBCODE_DATA); - // reassemble the data - for (framenum = 0; framenum < frames; framenum++) + /* reassemble the data */ + for (uint32_t framenum = 0; framenum < frames; framenum++) { - uint8_t *sector; - memcpy(&dest[framenum * CD_FRAME_SIZE], &cdlz->buffer[framenum * CD_MAX_SECTOR_DATA], CD_MAX_SECTOR_DATA); memcpy(&dest[framenum * CD_FRAME_SIZE + CD_MAX_SECTOR_DATA], &cdlz->buffer[frames * CD_MAX_SECTOR_DATA + framenum * CD_MAX_SUBCODE_DATA], CD_MAX_SUBCODE_DATA); - // reconstitute the ECC data and sync header - sector = &dest[framenum * CD_FRAME_SIZE]; + /* reconstitute the ECC data and sync header */ + sector = (uint8_t *)&dest[framenum * CD_FRAME_SIZE]; if ((src[framenum / 8] & (1 << (framenum % 8))) != 0) { memcpy(sector, s_cd_sync_header, sizeof(s_cd_sync_header)); @@ -656,14 +628,13 @@ chd_error cdlz_codec_decompress(void *codec, const uint8_t *src, uint32_t comple return CHDERR_NONE; } - -// cdzl +/* cdzl */ chd_error cdzl_codec_init(void *codec, uint32_t hunkbytes) { cdzl_codec_data* cdzl = (cdzl_codec_data*)codec; - // make sure the CHD's hunk size is an even multiple of the frame size + /* make sure the CHD's hunk size is an even multiple of the frame size */ zlib_codec_init(&cdzl->base_decompressor, (hunkbytes / CD_FRAME_SIZE) * CD_MAX_SECTOR_DATA); zlib_codec_init(&cdzl->subcode_decompressor, (hunkbytes / CD_FRAME_SIZE) * CD_MAX_SUBCODE_DATA); @@ -676,38 +647,40 @@ chd_error cdzl_codec_init(void *codec, uint32_t hunkbytes) void cdzl_codec_free(void *codec) { - // TODO + cdzl_codec_data* cdzl = (cdzl_codec_data*)codec; + zlib_codec_free(&cdzl->base_decompressor); + zlib_codec_free(&cdzl->subcode_decompressor); + free(cdzl->buffer); } chd_error cdzl_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen) { - uint32_t framenum; + uint8_t *sector; cdzl_codec_data* cdzl = (cdzl_codec_data*)codec; - - // determine header bytes + + /* determine header bytes */ uint32_t frames = destlen / CD_FRAME_SIZE; uint32_t complen_bytes = (destlen < 65536) ? 2 : 3; uint32_t ecc_bytes = (frames + 7) / 8; uint32_t header_bytes = ecc_bytes + complen_bytes; - // extract compressed length of base + /* extract compressed length of base */ uint32_t complen_base = (src[ecc_bytes + 0] << 8) | src[ecc_bytes + 1]; if (complen_bytes > 2) complen_base = (complen_base << 8) | src[ecc_bytes + 2]; - // reset and decode + /* reset and decode */ zlib_codec_decompress(&cdzl->base_decompressor, &src[header_bytes], complen_base, &cdzl->buffer[0], frames * CD_MAX_SECTOR_DATA); zlib_codec_decompress(&cdzl->subcode_decompressor, &src[header_bytes + complen_base], complen - complen_base - header_bytes, &cdzl->buffer[frames * CD_MAX_SECTOR_DATA], frames * CD_MAX_SUBCODE_DATA); - // reassemble the data - for (framenum = 0; framenum < frames; framenum++) + /* reassemble the data */ + for (uint32_t framenum = 0; framenum < frames; framenum++) { - uint8_t *sector; memcpy(&dest[framenum * CD_FRAME_SIZE], &cdzl->buffer[framenum * CD_MAX_SECTOR_DATA], CD_MAX_SECTOR_DATA); memcpy(&dest[framenum * CD_FRAME_SIZE + CD_MAX_SECTOR_DATA], &cdzl->buffer[frames * CD_MAX_SECTOR_DATA + framenum * CD_MAX_SUBCODE_DATA], CD_MAX_SUBCODE_DATA); - // reconstitute the ECC data and sync header - sector = &dest[framenum * CD_FRAME_SIZE]; + /* reconstitute the ECC data and sync header */ + sector = (uint8_t *)&dest[framenum * CD_FRAME_SIZE]; if ((src[framenum / 8] & (1 << (framenum % 8))) != 0) { memcpy(sector, s_cd_sync_header, sizeof(s_cd_sync_header)); @@ -717,20 +690,20 @@ chd_error cdzl_codec_decompress(void *codec, const uint8_t *src, uint32_t comple return CHDERR_NONE; } -//************************************************************************** -// CD FLAC DECOMPRESSOR -//************************************************************************** - - +/*************************************************************************** + * CD FLAC DECOMPRESSOR + *************************************************************************** + */ -//------------------------------------------------------ -// cdfl_codec_blocksize - return the optimal block size -//------------------------------------------------------ +/*------------------------------------------------------ + * cdfl_codec_blocksize - return the optimal block size + *------------------------------------------------------ + */ static uint32_t cdfl_codec_blocksize(uint32_t bytes) { - // determine FLAC block size, which must be 16-65535 - // clamp to 2k since that's supposed to be the sweet spot + /* determine FLAC block size, which must be 16-65535 + * clamp to 2k since that's supposed to be the sweet spot */ uint32_t hunkbytes = bytes / 4; while (hunkbytes > 2048) hunkbytes /= 2; @@ -739,83 +712,83 @@ static uint32_t cdfl_codec_blocksize(uint32_t bytes) chd_error cdfl_codec_init(void *codec, uint32_t hunkbytes) { - int zerr; - uint16_t native_endian = 0; cdfl_codec_data *cdfl = (cdfl_codec_data*)codec; cdfl->buffer = (uint8_t*)malloc(sizeof(uint8_t) * hunkbytes); - // make sure the CHD's hunk size is an even multiple of the frame size + /* make sure the CHD's hunk size is an even multiple of the frame size */ if (hunkbytes % CD_FRAME_SIZE != 0) return CHDERR_CODEC_ERROR; - // determine whether we want native or swapped samples + /* determine whether we want native or swapped samples */ + uint16_t native_endian = 0; *(uint8_t *)(&native_endian) = 1; cdfl->swap_endian = (native_endian & 1); - // init the inflater - cdfl->inflater.next_in = (Bytef *)cdfl; // bogus, but that's ok + /* init the inflater */ + cdfl->inflater.next_in = (Bytef *)cdfl; /* bogus, but that's ok */ cdfl->inflater.avail_in = 0; - //cdfl->allocator.install(cdfl->inflater); +#if 0 + cdfl->allocator.install(cdfl->inflater); +#endif cdfl->inflater.zalloc = zlib_fast_alloc; cdfl->inflater.zfree = zlib_fast_free; cdfl->inflater.opaque = &cdfl->allocator; - zerr = inflateInit2(&cdfl->inflater, -MAX_WBITS); + int zerr = inflateInit2(&cdfl->inflater, -MAX_WBITS); - // convert errors + /* convert errors */ if (zerr == Z_MEM_ERROR) return CHDERR_OUT_OF_MEMORY; else if (zerr != Z_OK) return CHDERR_CODEC_ERROR; - // init flac decoder + /* flac decoder init */ flac_decoder_init(&cdfl->decoder); - return CHDERR_NONE; } void cdfl_codec_free(void *codec) { cdfl_codec_data *cdfl = (cdfl_codec_data*)codec; + free(cdfl->buffer); inflateEnd(&cdfl->inflater); + flac_decoder_free(&cdfl->decoder); } chd_error cdfl_codec_decompress(void *codec, const uint8_t *src, uint32_t complen, uint8_t *dest, uint32_t destlen) { - int zerr; - uint8_t *buffer; - uint32_t framenum, offset; cdfl_codec_data *cdfl = (cdfl_codec_data*)codec; - // reset and decode + /* reset and decode */ uint32_t frames = destlen / CD_FRAME_SIZE; + if (!flac_decoder_reset(&cdfl->decoder, 44100, 2, cdfl_codec_blocksize(frames * CD_MAX_SECTOR_DATA), src, complen)) return CHDERR_DECOMPRESSION_ERROR; - buffer = &cdfl->buffer[0]; + uint8_t *buffer = &cdfl->buffer[0]; if (!flac_decoder_decode_interleaved(&cdfl->decoder, (int16_t *)(buffer), frames * CD_MAX_SECTOR_DATA/4, cdfl->swap_endian)) return CHDERR_DECOMPRESSION_ERROR; - // inflate the subcode data - offset = flac_decoder_finish(&cdfl->decoder); + /* inflate the subcode data */ + uint32_t offset = flac_decoder_finish(&cdfl->decoder); cdfl->inflater.next_in = (Bytef *)(src + offset); cdfl->inflater.avail_in = complen - offset; cdfl->inflater.total_in = 0; cdfl->inflater.next_out = &cdfl->buffer[frames * CD_MAX_SECTOR_DATA]; cdfl->inflater.avail_out = frames * CD_MAX_SUBCODE_DATA; cdfl->inflater.total_out = 0; - zerr = inflateReset(&cdfl->inflater); + int zerr = inflateReset(&cdfl->inflater); if (zerr != Z_OK) return CHDERR_DECOMPRESSION_ERROR; - // do it + /* do it */ zerr = inflate(&cdfl->inflater, Z_FINISH); if (zerr != Z_STREAM_END) return CHDERR_DECOMPRESSION_ERROR; if (cdfl->inflater.total_out != frames * CD_MAX_SUBCODE_DATA) return CHDERR_DECOMPRESSION_ERROR; - // reassemble the data - for (framenum = 0; framenum < frames; framenum++) + /* reassemble the data */ + for (uint32_t framenum = 0; framenum < frames; framenum++) { memcpy(&dest[framenum * CD_FRAME_SIZE], &cdfl->buffer[framenum * CD_MAX_SECTOR_DATA], CD_MAX_SECTOR_DATA); memcpy(&dest[framenum * CD_FRAME_SIZE + CD_MAX_SECTOR_DATA], &cdfl->buffer[frames * CD_MAX_SECTOR_DATA + framenum * CD_MAX_SUBCODE_DATA], CD_MAX_SUBCODE_DATA); @@ -827,13 +800,6 @@ chd_error cdfl_codec_decompress(void *codec, const uint8_t *src, uint32_t comple CODEC INTERFACES ***************************************************************************/ -#define CHD_MAKE_TAG(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) - -// general codecs with CD frontend -#define CHD_CODEC_CD_ZLIB CHD_MAKE_TAG('c','d','z','l') -#define CHD_CODEC_CD_LZMA CHD_MAKE_TAG('c','d','l','z') -#define CHD_CODEC_CD_FLAC CHD_MAKE_TAG('c','d','f','l') - static const codec_interface codec_interfaces[] = { /* "none" or no compression */ @@ -869,6 +835,17 @@ static const codec_interface codec_interfaces[] = NULL }, + /* V5 zlib compression */ + { + CHD_CODEC_ZLIB, + "zlib (Deflate)", + FALSE, + zlib_codec_init, + zlib_codec_free, + zlib_codec_decompress, + NULL + }, + /* V5 CD zlib compression */ { CHD_CODEC_CD_ZLIB, @@ -878,7 +855,7 @@ static const codec_interface codec_interfaces[] = cdzl_codec_free, cdzl_codec_decompress, NULL - }, + }, /* V5 CD lzma compression */ { @@ -889,7 +866,7 @@ static const codec_interface codec_interfaces[] = cdlz_codec_free, cdlz_codec_decompress, NULL - }, + }, /* V5 CD flac compression */ { @@ -900,7 +877,7 @@ static const codec_interface codec_interfaces[] = cdfl_codec_free, cdfl_codec_decompress, NULL - }, + }, }; /*************************************************************************** @@ -918,7 +895,6 @@ static inline UINT64 get_bigendian_uint64(const UINT8 *base) ((UINT64)base[4] << 24) | ((UINT64)base[5] << 16) | ((UINT64)base[6] << 8) | (UINT64)base[7]; } - /*------------------------------------------------- put_bigendian_uint64 - write a UINT64 to the data stream in bigendian order @@ -954,7 +930,7 @@ static inline UINT64 get_bigendian_uint48(const UINT8 *base) static inline void put_bigendian_uint48(UINT8 *base, UINT64 value) { - value &= 0xffffffffffff; + value &= 0xffffffffffff; base[0] = value >> 40; base[1] = value >> 32; base[2] = value >> 24; @@ -972,27 +948,25 @@ static inline UINT32 get_bigendian_uint32(const UINT8 *base) return (base[0] << 24) | (base[1] << 16) | (base[2] << 8) | base[3]; } - /*------------------------------------------------- put_bigendian_uint32 - write a UINT32 to the data stream in bigendian order -------------------------------------------------*/ -static inline void put_bigendian_uint24(UINT8 *base, UINT32 value) +static inline void put_bigendian_uint32(UINT8 *base, UINT32 value) { - value &= 0xffffff; - base[0] = value >> 16; - base[1] = value >> 8; - base[2] = value; + base[0] = value >> 24; + base[1] = value >> 16; + base[2] = value >> 8; + base[3] = value; } - /*------------------------------------------------- put_bigendian_uint24 - write a UINT24 to the data stream in bigendian order -------------------------------------------------*/ -static inline void put_bigendian_uint32(UINT8 *base, UINT32 value) +static inline void put_bigendian_uint24(UINT8 *base, UINT32 value) { value &= 0xffffff; base[0] = value >> 16; @@ -1020,7 +994,6 @@ static inline UINT16 get_bigendian_uint16(const UINT8 *base) return (base[0] << 8) | base[1]; } - /*------------------------------------------------- put_bigendian_uint16 - write a UINT16 to the data stream in bigendian order @@ -1032,7 +1005,6 @@ static inline void put_bigendian_uint16(UINT8 *base, UINT16 value) base[1] = value; } - /*------------------------------------------------- map_extract - extract a single map entry from the datastream @@ -1046,7 +1018,6 @@ static inline void map_extract(const UINT8 *base, map_entry *entry) entry->flags = base[15]; } - /*------------------------------------------------- map_assemble - write a single map entry to the datastream @@ -1069,7 +1040,6 @@ static inline int map_size_v5(chd_header* header) return header->hunkcount * header->mapentrybytes; } - /*------------------------------------------------- crc16 - calculate CRC16 (from hashing.cpp) -------------------------------------------------*/ @@ -1115,65 +1085,62 @@ uint16_t crc16(const void *data, uint32_t length) const uint8_t *src = (uint8_t*)data; - // fetch the current value into a local and rip through the source data + /* fetch the current value into a local and rip through the source data */ while (length-- != 0) crc = (crc << 8) ^ s_table[(crc >> 8) ^ *src++]; return crc; } +/*------------------------------------------------- + compressed - test if CHD file is compressed ++-------------------------------------------------*/ + +static inline int compressed(chd_header* header) { + return header->compression[0] != CHD_CODEC_NONE; +} + /*------------------------------------------------- decompress_v5_map - decompress the v5 map -------------------------------------------------*/ static chd_error decompress_v5_map(chd_file* chd, chd_header* header) { - int hunknum; - uint8_t lastcomp = 0; - int repcount = 0; - uint32_t last_self = 0; - uint64_t last_parent = 0; - struct bitstream* bitbuf; - uint32_t mapbytes; - uint64_t firstoffs; - uint16_t mapcrc; - uint8_t lengthbits; - uint8_t selfbits; - uint8_t parentbits; - uint8_t *compressed; - uint8_t rawbuf[16]; - struct huffman_decoder* decoder; - enum huffman_error err; - uint64_t curoffset; + int rawmapsize = map_size_v5(header); - if (header->mapoffset == 0) + if (!compressed(header)) { - //memset(header->rawmap, 0xff,map_size_v5(header)); - return CHDERR_READ_ERROR; + header->rawmap = (uint8_t*)malloc(rawmapsize); + core_fseek(chd->file, header->mapoffset, SEEK_SET); + core_fread(chd->file, header->rawmap, rawmapsize); + return CHDERR_NONE; } - // read the reader + /* read the reader */ + uint8_t rawbuf[16]; core_fseek(chd->file, header->mapoffset, SEEK_SET); core_fread(chd->file, rawbuf, sizeof(rawbuf)); - mapbytes = get_bigendian_uint32(&rawbuf[0]); - firstoffs = get_bigendian_uint48(&rawbuf[4]); - mapcrc = get_bigendian_uint16(&rawbuf[10]); - lengthbits = rawbuf[12]; - selfbits = rawbuf[13]; - parentbits = rawbuf[14]; - - // now read the map - compressed = (uint8_t*)malloc(sizeof(uint8_t) * mapbytes); + uint32_t const mapbytes = get_bigendian_uint32(&rawbuf[0]); + uint64_t const firstoffs = get_bigendian_uint48(&rawbuf[4]); + uint16_t const mapcrc = get_bigendian_uint16(&rawbuf[10]); + uint8_t const lengthbits = rawbuf[12]; + uint8_t const selfbits = rawbuf[13]; + uint8_t const parentbits = rawbuf[14]; + + /* now read the map */ + uint8_t* compressed = (uint8_t*)malloc(sizeof(uint8_t) * mapbytes); core_fseek(chd->file, header->mapoffset + 16, SEEK_SET); core_fread(chd->file, compressed, mapbytes); - bitbuf = create_bitstream(compressed, sizeof(uint8_t) * mapbytes); - header->rawmap = (uint8_t*)malloc(sizeof(uint8_t) * map_size_v5(header)); + struct bitstream* bitbuf = create_bitstream(compressed, sizeof(uint8_t) * mapbytes); + header->rawmap = (uint8_t*)malloc(rawmapsize); - // first decode the compression types - decoder = create_huffman_decoder(16, 8); - err = huffman_import_tree_rle(decoder, bitbuf); + /* first decode the compression types */ + struct huffman_decoder* decoder = create_huffman_decoder(16, 8); + enum huffman_error err = huffman_import_tree_rle(decoder, bitbuf); if (err != HUFFERR_NONE) return CHDERR_DECOMPRESSION_ERROR; - for (hunknum = 0; hunknum < header->hunkcount; hunknum++) + uint8_t lastcomp = 0; + int repcount = 0; + for (int hunknum = 0; hunknum < header->hunkcount; hunknum++) { uint8_t *rawmap = header->rawmap + (hunknum * 12); if (repcount > 0) @@ -1190,9 +1157,11 @@ static chd_error decompress_v5_map(chd_file* chd, chd_header* header) } } - // then iterate through the hunks and extract the needed data - curoffset = firstoffs; - for (hunknum = 0; hunknum < header->hunkcount; hunknum++) + /* then iterate through the hunks and extract the needed data */ + uint64_t curoffset = firstoffs; + uint32_t last_self = 0; + uint64_t last_parent = 0; + for (int hunknum = 0; hunknum < header->hunkcount; hunknum++) { uint8_t *rawmap = header->rawmap + (hunknum * 12); uint64_t offset = curoffset; @@ -1200,7 +1169,7 @@ static chd_error decompress_v5_map(chd_file* chd, chd_header* header) uint16_t crc = 0; switch (rawmap[0]) { - // base types + /* base types */ case COMPRESSION_TYPE_0: case COMPRESSION_TYPE_1: case COMPRESSION_TYPE_2: @@ -1223,7 +1192,7 @@ static chd_error decompress_v5_map(chd_file* chd, chd_header* header) last_parent = offset; break; - // pseudo-types; convert into base types + /* pseudo-types; convert into base types */ case COMPRESSION_SELF_1: last_self++; case COMPRESSION_SELF_0: @@ -1243,17 +1212,23 @@ static chd_error decompress_v5_map(chd_file* chd, chd_header* header) offset = last_parent; break; } - // UINT24 length + /* UINT24 length */ put_bigendian_uint24(&rawmap[1], length); - // UINT48 offset + /* UINT48 offset */ put_bigendian_uint48(&rawmap[4], offset); - // crc16 + /* crc16 */ put_bigendian_uint16(&rawmap[10], crc); } - // verify the final CRC + free(compressed); + free(bitbuf); + free(decoder->lookup); + free(decoder->huffnode); + free(decoder); + + /* verify the final CRC */ if (crc16(&header->rawmap[0], header->hunkcount * 12) != mapcrc) return CHDERR_DECOMPRESSION_ERROR; @@ -1278,12 +1253,10 @@ static inline void map_extract_old(const UINT8 *base, map_entry *entry, UINT32 h #endif } - /*************************************************************************** CHD FILE MANAGEMENT ***************************************************************************/ - /*------------------------------------------------- chd_open_file - open a CHD file for access -------------------------------------------------*/ @@ -1303,16 +1276,16 @@ chd_error chd_open_file(core_file *file, int mode, chd_file *parent, chd_file ** EARLY_EXIT(err = CHDERR_INVALID_PARAMETER); /* allocate memory for the final result */ - newchd = (chd_file *)malloc(sizeof(chd_file)); + newchd = (chd_file *)malloc(sizeof(**chd)); if (newchd == NULL) EARLY_EXIT(err = CHDERR_OUT_OF_MEMORY); - memset(newchd, 0, sizeof(chd_file)); + memset(newchd, 0, sizeof(*newchd)); newchd->cookie = COOKIE_VALUE; newchd->parent = parent; newchd->file = file; /* now attempt to read the header */ - err = header_read(newchd->file, &newchd->header); + err = header_read(newchd, &newchd->header); if (err != CHDERR_NONE) EARLY_EXIT(err); @@ -1353,13 +1326,14 @@ chd_error chd_open_file(core_file *file, int mode, chd_file *parent, chd_file ** if (newchd->header.version < 5) { err = map_read(newchd); - if (err != CHDERR_NONE) - EARLY_EXIT(err); } - else + else { err = decompress_v5_map(newchd, &(newchd->header)); } + if (err != CHDERR_NONE) + EARLY_EXIT(err); + /* allocate and init the hunk cache */ newchd->cache = (UINT8 *)malloc(newchd->header.hunkbytes); @@ -1378,66 +1352,75 @@ chd_error chd_open_file(core_file *file, int mode, chd_file *parent, chd_file ** if (newchd->header.version < 5) { for (intfnum = 0; intfnum < ARRAY_LENGTH(codec_interfaces); intfnum++) + { if (codec_interfaces[intfnum].compression == newchd->header.compression[0]) { newchd->codecintf[0] = &codec_interfaces[intfnum]; break; } + } + if (intfnum == ARRAY_LENGTH(codec_interfaces)) EARLY_EXIT(err = CHDERR_UNSUPPORTED_FORMAT); /* initialize the codec */ if (newchd->codecintf[0]->init != NULL) + { err = (*newchd->codecintf[0]->init)(&newchd->zlib_codec_data, newchd->header.hunkbytes); + if (err != CHDERR_NONE) + EARLY_EXIT(err); + } } else { - int decompnum; - - // verify the compression types and initialize the codecs - for (decompnum = 0; decompnum < ARRAY_LENGTH(newchd->header.compression); decompnum++) + /* verify the compression types and initialize the codecs */ + for (int decompnum = 0; decompnum < ARRAY_LENGTH(newchd->header.compression); decompnum++) { - int i; - for (i = 0 ; i < ARRAY_LENGTH(codec_interfaces) ; i++) + for (int i = 0 ; i < ARRAY_LENGTH(codec_interfaces) ; i++) { if (codec_interfaces[i].compression == newchd->header.compression[decompnum]) { newchd->codecintf[decompnum] = &codec_interfaces[i]; - if (newchd->codecintf[decompnum] == NULL && newchd->header.compression[decompnum] != 0) - err = CHDERR_UNSUPPORTED_FORMAT; - - /* initialize the codec */ - if (newchd->codecintf[decompnum]->init != NULL) - { - void* codec = NULL; - switch (newchd->header.compression[decompnum]) - { - case CHD_CODEC_CD_ZLIB: - codec = &newchd->cdzl_codec_data; - break; - - case CHD_CODEC_CD_LZMA: - codec = &newchd->cdlz_codec_data; - break; - - case CHD_CODEC_CD_FLAC: - codec = &newchd->cdfl_codec_data; - break; - } - if (codec != NULL) - { - err = (*newchd->codecintf[decompnum]->init)(codec, newchd->header.hunkbytes); - } - } + break; } } + + if (newchd->codecintf[decompnum] == NULL && newchd->header.compression[decompnum] != 0) + EARLY_EXIT(err = CHDERR_UNSUPPORTED_FORMAT); + + /* initialize the codec */ + if (newchd->codecintf[decompnum]->init != NULL) + { + void* codec = NULL; + switch (newchd->header.compression[decompnum]) + { + case CHD_CODEC_ZLIB: + codec = &newchd->zlib_codec_data; + break; + + case CHD_CODEC_CD_ZLIB: + codec = &newchd->cdzl_codec_data; + break; + + case CHD_CODEC_CD_LZMA: + codec = &newchd->cdlz_codec_data; + break; + + case CHD_CODEC_CD_FLAC: + codec = &newchd->cdfl_codec_data; + break; + } + + if (codec == NULL) + EARLY_EXIT(err = CHDERR_UNSUPPORTED_FORMAT); + + err = (*newchd->codecintf[decompnum]->init)(codec, newchd->header.hunkbytes); + if (err != CHDERR_NONE) + EARLY_EXIT(err); + } } } - // HACK - //if (err != CHDERR_NONE) - // EARLY_EXIT(err); - /* all done */ *chd = newchd; return CHDERR_NONE; @@ -1448,6 +1431,37 @@ cleanup: return err; } +/*------------------------------------------------- + chd_precache - precache underlying file in + memory +-------------------------------------------------*/ + +chd_error chd_precache(chd_file *chd) +{ + ssize_t size, count; + + if (chd->file_cache == NULL) + { + core_fseek(chd->file, 0, SEEK_END); + size = core_ftell(chd->file); + if (size <= 0) + return CHDERR_INVALID_DATA; + chd->file_cache = malloc(size); + if (chd->file_cache == NULL) + return CHDERR_OUT_OF_MEMORY; + core_fseek(chd->file, 0, SEEK_SET); + count = core_fread(chd->file, chd->file_cache, size); + if (count != size) + { + free(chd->file_cache); + chd->file_cache = NULL; + return CHDERR_READ_ERROR; + } + } + + return CHDERR_NONE; +} + /*------------------------------------------------- chd_open - open a CHD file by filename @@ -1492,32 +1506,6 @@ cleanup: return err; } -chd_error chd_precache(chd_file *chd) -{ - ssize_t size, count; - - if (chd->file_cache == NULL) - { - core_fseek(chd->file, 0, SEEK_END); - size = core_ftell(chd->file); - if (size <= 0) - return CHDERR_INVALID_DATA; - chd->file_cache = malloc(size); - if (chd->file_cache == NULL) - return CHDERR_OUT_OF_MEMORY; - core_fseek(chd->file, 0, SEEK_SET); - count = core_fread(chd->file, chd->file_cache, size); - if (count != size) - { - free(chd->file_cache); - chd->file_cache = NULL; - return CHDERR_READ_ERROR; - } - } - - return CHDERR_NONE; -} - /*------------------------------------------------- chd_close - close a CHD file for access -------------------------------------------------*/ @@ -1531,22 +1519,29 @@ void chd_close(chd_file *chd) /* deinit the codec */ if (chd->header.version < 5) { - if (chd->codecintf[0] != NULL && chd->codecintf[0]->free != NULL) - (*chd->codecintf[0]->free)(&chd->zlib_codec_data); + if (chd->codecintf[0] != NULL && chd->codecintf[0]->free != NULL) + (*chd->codecintf[0]->free)(&chd->zlib_codec_data); } else { - int i; - // Free the codecs - for (i = 0 ; i < 4 ; i++) + /* Free the codecs */ + for (int i = 0 ; i < ARRAY_LENGTH(chd->codecintf); i++) { void* codec = NULL; + + if (chd->codecintf[i] == NULL) + continue; + switch (chd->codecintf[i]->compression) { case CHD_CODEC_CD_LZMA: codec = &chd->cdlz_codec_data; break; + case CHD_CODEC_ZLIB: + codec = &chd->zlib_codec_data; + break; + case CHD_CODEC_CD_ZLIB: codec = &chd->cdzl_codec_data; break; @@ -1554,14 +1549,15 @@ void chd_close(chd_file *chd) case CHD_CODEC_CD_FLAC: codec = &chd->cdfl_codec_data; break; - } + } + if (codec) { (*chd->codecintf[i]->free)(codec); } } - // Free the raw map + /* Free the raw map */ if (chd->header.rawmap != NULL) free(chd->header.rawmap); } @@ -1601,7 +1597,6 @@ void chd_close(chd_file *chd) free(chd); } - /*------------------------------------------------- chd_core_file - return the associated core_file @@ -1612,7 +1607,6 @@ core_file *chd_core_file(chd_file *chd) return chd->file; } - /*------------------------------------------------- chd_error_string - return an error string for the given CHD error @@ -1654,8 +1648,6 @@ const char *chd_error_string(chd_error err) } } - - /*************************************************************************** CHD HEADER MANAGEMENT ***************************************************************************/ @@ -1674,8 +1666,6 @@ const chd_header *chd_get_header(chd_file *chd) return &chd->header; } - - /*************************************************************************** CORE DATA READ/WRITE ***************************************************************************/ @@ -1699,10 +1689,6 @@ chd_error chd_read(chd_file *chd, UINT32 hunknum, void *buffer) return hunk_read_into_memory(chd, hunknum, (UINT8 *)buffer); } - - - - /*************************************************************************** METADATA MANAGEMENT ***************************************************************************/ @@ -1762,8 +1748,6 @@ chd_error chd_get_metadata(chd_file *chd, UINT32 searchtag, UINT32 searchindex, return CHDERR_NONE; } - - /*************************************************************************** CODEC INTERFACES ***************************************************************************/ @@ -1775,11 +1759,9 @@ chd_error chd_get_metadata(chd_file *chd, UINT32 searchtag, UINT32 searchindex, chd_error chd_codec_config(chd_file *chd, int param, void *config) { - return CHDERR_INVALID_PARAMETER; } - /*------------------------------------------------- chd_get_codec_name - get the name of a particular codec @@ -1790,7 +1772,6 @@ const char *chd_get_codec_name(UINT32 codec) return "Unknown"; } - /*************************************************************************** INTERNAL HEADER OPERATIONS ***************************************************************************/ @@ -1803,11 +1784,11 @@ const char *chd_get_codec_name(UINT32 codec) static chd_error header_validate(const chd_header *header) { int intfnum; - + /* require a valid version */ if (header->version == 0 || header->version > CHD_HEADER_VERSION) return CHDERR_UNSUPPORTED_VERSION; - + /* require a valid length */ if ((header->version == 1 && header->length != CHD_V1_HEADER_SIZE) || (header->version == 2 && header->length != CHD_V2_HEADER_SIZE) || @@ -1815,7 +1796,7 @@ static chd_error header_validate(const chd_header *header) (header->version == 4 && header->length != CHD_V4_HEADER_SIZE) || (header->version == 5 && header->length != CHD_V5_HEADER_SIZE)) return CHDERR_INVALID_PARAMETER; - + /* Do not validate v5 header */ if (header->version <= 4) { @@ -1859,13 +1840,38 @@ static chd_error header_validate(const chd_header *header) return CHDERR_NONE; } +/*------------------------------------------------- + header_guess_unitbytes - for older CHD formats, + guess at the bytes/unit based on metadata +-------------------------------------------------*/ + +static UINT32 header_guess_unitbytes(chd_file *chd) +{ + /* look for hard disk metadata; if found, then the unit size == sector size */ + char metadata[512]; + int i0, i1, i2, i3; + if (chd_get_metadata(chd, HARD_DISK_METADATA_TAG, 0, metadata, sizeof(metadata), NULL, NULL, NULL) == CHDERR_NONE && + sscanf(metadata, HARD_DISK_METADATA_FORMAT, &i0, &i1, &i2, &i3) == 4) + return i3; + + /* look for CD-ROM metadata; if found, then the unit size == CD frame size */ + if (chd_get_metadata(chd, CDROM_OLD_METADATA_TAG, 0, metadata, sizeof(metadata), NULL, NULL, NULL) == CHDERR_NONE || + chd_get_metadata(chd, CDROM_TRACK_METADATA_TAG, 0, metadata, sizeof(metadata), NULL, NULL, NULL) == CHDERR_NONE || + chd_get_metadata(chd, CDROM_TRACK_METADATA2_TAG, 0, metadata, sizeof(metadata), NULL, NULL, NULL) == CHDERR_NONE || + chd_get_metadata(chd, GDROM_OLD_METADATA_TAG, 0, metadata, sizeof(metadata), NULL, NULL, NULL) == CHDERR_NONE || + chd_get_metadata(chd, GDROM_TRACK_METADATA_TAG, 0, metadata, sizeof(metadata), NULL, NULL, NULL) == CHDERR_NONE) + return CD_FRAME_SIZE; + + /* otherwise, just map 1:1 with the hunk size */ + return chd->header.hunkbytes; +} /*------------------------------------------------- header_read - read a CHD header into the internal data structure -------------------------------------------------*/ -static chd_error header_read(core_file *file, chd_header *header) +static chd_error header_read(chd_file *chd, chd_header *header) { UINT8 rawheader[CHD_MAX_HEADER_SIZE]; UINT32 count; @@ -1875,12 +1881,12 @@ static chd_error header_read(core_file *file, chd_header *header) return CHDERR_INVALID_PARAMETER; /* punt if invalid file */ - if (file == NULL) + if (chd->file == NULL) return CHDERR_INVALID_FILE; /* seek and read */ - core_fseek(file, 0, SEEK_SET); - count = core_fread(file, rawheader, sizeof(rawheader)); + core_fseek(chd->file, 0, SEEK_SET); + count = core_fread(chd->file, rawheader, sizeof(rawheader)); if (count != sizeof(rawheader)) return CHDERR_READ_ERROR; @@ -1903,12 +1909,15 @@ static chd_error header_read(core_file *file, chd_header *header) (header->version == 3 && header->length != CHD_V3_HEADER_SIZE) || (header->version == 4 && header->length != CHD_V4_HEADER_SIZE) || (header->version == 5 && header->length != CHD_V5_HEADER_SIZE)) - + return CHDERR_INVALID_DATA; /* extract the common data */ header->flags = get_bigendian_uint32(&rawheader[16]); header->compression[0] = get_bigendian_uint32(&rawheader[20]); + header->compression[1] = CHD_CODEC_NONE; + header->compression[2] = CHD_CODEC_NONE; + header->compression[3] = CHD_CODEC_NONE; /* extract the V1/V2-specific data */ if (header->version < 3) @@ -1923,6 +1932,8 @@ static chd_error header_read(core_file *file, chd_header *header) memcpy(header->parentmd5, &rawheader[60], CHD_MD5_BYTES); header->logicalbytes = (UINT64)header->obsolete_cylinders * (UINT64)header->obsolete_heads * (UINT64)header->obsolete_sectors * (UINT64)seclen; header->hunkbytes = seclen * header->obsolete_hunksize; + header->unitbytes = header_guess_unitbytes(chd); + header->unitcount = (header->logicalbytes + header->unitbytes - 1) / header->unitbytes; header->metaoffset = 0; } @@ -1935,6 +1946,8 @@ static chd_error header_read(core_file *file, chd_header *header) memcpy(header->md5, &rawheader[44], CHD_MD5_BYTES); memcpy(header->parentmd5, &rawheader[60], CHD_MD5_BYTES); header->hunkbytes = get_bigendian_uint32(&rawheader[76]); + header->unitbytes = header_guess_unitbytes(chd); + header->unitcount = (header->logicalbytes + header->unitbytes - 1) / header->unitbytes; memcpy(header->sha1, &rawheader[80], CHD_SHA1_BYTES); memcpy(header->parentsha1, &rawheader[100], CHD_SHA1_BYTES); } @@ -1946,6 +1959,8 @@ static chd_error header_read(core_file *file, chd_header *header) header->logicalbytes = get_bigendian_uint64(&rawheader[28]); header->metaoffset = get_bigendian_uint64(&rawheader[36]); header->hunkbytes = get_bigendian_uint32(&rawheader[44]); + header->unitbytes = header_guess_unitbytes(chd); + header->unitcount = (header->logicalbytes + header->unitbytes - 1) / header->unitbytes; memcpy(header->sha1, &rawheader[48], CHD_SHA1_BYTES); memcpy(header->parentsha1, &rawheader[68], CHD_SHA1_BYTES); memcpy(header->rawsha1, &rawheader[88], CHD_SHA1_BYTES); @@ -1955,30 +1970,30 @@ static chd_error header_read(core_file *file, chd_header *header) else if (header->version == 5) { /* TODO */ - header->compression[0] = get_bigendian_uint32(&rawheader[16]); - header->compression[1] = get_bigendian_uint32(&rawheader[20]); - header->compression[2] = get_bigendian_uint32(&rawheader[24]); - header->compression[3] = get_bigendian_uint32(&rawheader[28]); - header->logicalbytes = get_bigendian_uint64(&rawheader[32]); - header->mapoffset = get_bigendian_uint64(&rawheader[40]); - header->metaoffset = get_bigendian_uint64(&rawheader[48]); - header->hunkbytes = get_bigendian_uint32(&rawheader[56]); - header->hunkcount = (header->logicalbytes + header->hunkbytes - 1) / header->hunkbytes; - header->unitbytes = get_bigendian_uint32(&rawheader[60]); - header->unitcount = (header->logicalbytes + header->unitbytes - 1) / header->unitbytes; + header->compression[0] = get_bigendian_uint32(&rawheader[16]); + header->compression[1] = get_bigendian_uint32(&rawheader[20]); + header->compression[2] = get_bigendian_uint32(&rawheader[24]); + header->compression[3] = get_bigendian_uint32(&rawheader[28]); + header->logicalbytes = get_bigendian_uint64(&rawheader[32]); + header->mapoffset = get_bigendian_uint64(&rawheader[40]); + header->metaoffset = get_bigendian_uint64(&rawheader[48]); + header->hunkbytes = get_bigendian_uint32(&rawheader[56]); + header->hunkcount = (header->logicalbytes + header->hunkbytes - 1) / header->hunkbytes; + header->unitbytes = get_bigendian_uint32(&rawheader[60]); + header->unitcount = (header->logicalbytes + header->unitbytes - 1) / header->unitbytes; memcpy(header->sha1, &rawheader[84], CHD_SHA1_BYTES); memcpy(header->parentsha1, &rawheader[104], CHD_SHA1_BYTES); memcpy(header->rawsha1, &rawheader[64], CHD_SHA1_BYTES); - // determine properties of map entries - header->mapentrybytes = 12; //TODO compressed() ? 12 : 4; + /* determine properties of map entries */ + header->mapentrybytes = compressed(header) ? 12 : 4; - // hack + /* hack */ header->totalhunks = header->hunkcount; } /* Unknown version */ - else + else { /* TODO */ } @@ -1987,41 +2002,16 @@ static chd_error header_read(core_file *file, chd_header *header) return CHDERR_NONE; } - /*************************************************************************** INTERNAL HUNK READ/WRITE ***************************************************************************/ /*------------------------------------------------- - hunk_read_into_cache - read a hunk into - the CHD's hunk cache + hunk_read_compressed - read a compressed + hunk -------------------------------------------------*/ -static chd_error hunk_read_into_cache(chd_file *chd, UINT32 hunknum) -{ - chd_error err; - - /* track the max */ - if (hunknum > chd->maxhunk) - chd->maxhunk = hunknum; - - /* if we're already in the cache, we're done */ - if (chd->cachehunk == hunknum) - return CHDERR_NONE; - chd->cachehunk = ~0; - - /* otherwise, read the data */ - err = hunk_read_into_memory(chd, hunknum, chd->cache); - if (err != CHDERR_NONE) - return err; - - /* mark the hunk successfully cached in */ - chd->cachehunk = hunknum; - return CHDERR_NONE; -} - - -static UINT8* read_compressed(chd_file *chd, UINT64 offset, size_t size) +static UINT8* hunk_read_compressed(chd_file *chd, UINT64 offset, size_t size) { ssize_t bytes; if (chd->file_cache != NULL) @@ -2038,7 +2028,12 @@ static UINT8* read_compressed(chd_file *chd, UINT64 offset, size_t size) } } -static chd_error read_uncompressed(chd_file *chd, UINT64 offset, size_t size, UINT8 *dest) +/*------------------------------------------------- + hunk_read_uncompressed - read an uncompressed + hunk +-------------------------------------------------*/ + +static chd_error hunk_read_uncompressed(chd_file *chd, UINT64 offset, size_t size, UINT8 *dest) { ssize_t bytes; if (chd->file_cache != NULL) @@ -2055,6 +2050,34 @@ static chd_error read_uncompressed(chd_file *chd, UINT64 offset, size_t size, UI return CHDERR_NONE; } +/*------------------------------------------------- + hunk_read_into_cache - read a hunk into + the CHD's hunk cache +-------------------------------------------------*/ + +static chd_error hunk_read_into_cache(chd_file *chd, UINT32 hunknum) +{ + chd_error err; + + /* track the max */ + if (hunknum > chd->maxhunk) + chd->maxhunk = hunknum; + + /* if we're already in the cache, we're done */ + if (chd->cachehunk == hunknum) + return CHDERR_NONE; + chd->cachehunk = ~0; + + /* otherwise, read the data */ + err = hunk_read_into_memory(chd, hunknum, chd->cache); + if (err != CHDERR_NONE) + return err; + + /* mark the hunk successfully cached in */ + chd->cachehunk = hunknum; + return CHDERR_NONE; +} + /*------------------------------------------------- hunk_read_into_memory - read a hunk into memory at the given location @@ -2064,7 +2087,7 @@ static chd_error hunk_read_into_memory(chd_file *chd, UINT32 hunknum, UINT8 *des { chd_error err; - // punt if no file + /* punt if no file */ if (chd->file == NULL) return CHDERR_INVALID_FILE; @@ -2076,31 +2099,31 @@ static chd_error hunk_read_into_memory(chd_file *chd, UINT32 hunknum, UINT8 *des { map_entry *entry = &chd->map[hunknum]; UINT32 bytes; + UINT8* compressed_bytes; /* switch off the entry type */ switch (entry->flags & MAP_ENTRY_FLAG_TYPE_MASK) { /* compressed data */ case V34_MAP_ENTRY_TYPE_COMPRESSED: - { - void* codec; - UINT8 *bytes = read_compressed(chd, entry->offset, entry->length); - if (bytes == NULL) - return CHDERR_READ_ERROR; - - /* now decompress using the codec */ - err = CHDERR_NONE; - codec = &chd->zlib_codec_data; - if (chd->codecintf[0]->decompress != NULL) - err = (*chd->codecintf[0]->decompress)(codec, bytes, entry->length, dest, chd->header.hunkbytes); - if (err != CHDERR_NONE) - return err; - } + + /* read it into the decompression buffer */ + compressed_bytes = hunk_read_compressed(chd, entry->offset, entry->length); + if (compressed_bytes == NULL) + return CHDERR_READ_ERROR; + + /* now decompress using the codec */ + err = CHDERR_NONE; + void* codec = &chd->zlib_codec_data; + if (chd->codecintf[0]->decompress != NULL) + err = (*chd->codecintf[0]->decompress)(codec, compressed_bytes, entry->length, dest, chd->header.hunkbytes); + if (err != CHDERR_NONE) + return err; break; /* uncompressed data */ case V34_MAP_ENTRY_TYPE_UNCOMPRESSED: - err = read_uncompressed(chd, entry->offset, chd->header.hunkbytes, dest); + err = hunk_read_uncompressed(chd, entry->offset, chd->header.hunkbytes, dest); if (err != CHDERR_NONE) return err; break; @@ -2129,43 +2152,45 @@ static chd_error hunk_read_into_memory(chd_file *chd, UINT32 hunknum, UINT8 *des } else { - - // get a pointer to the map entry + /* get a pointer to the map entry */ uint64_t blockoffs; uint32_t blocklen; uint16_t blockcrc; - void* codec = NULL; uint8_t *rawmap = &chd->header.rawmap[chd->header.mapentrybytes * hunknum]; - UINT8 *bytes; + UINT8* compressed_bytes; - // uncompressed case - /* TODO - if (!compressed()) + /* uncompressed case */ + if (!compressed(&chd->header)) { - blockoffs = uint64_t(be_read(rawmap, 4)) * uint64_t(m_hunkbytes); - if (blockoffs != 0) - file_read(blockoffs, dest, m_hunkbytes); + blockoffs = (uint64_t)get_bigendian_uint32(rawmap) * (uint64_t)chd->header.hunkbytes; + if (blockoffs != 0) { + core_fseek(chd->file, blockoffs, SEEK_SET); + core_fread(chd->file, dest, chd->header.hunkbytes); + /* TODO else if (m_parent_missing) - throw CHDERR_REQUIRES_PARENT; - else if (m_parent != nullptr) - m_parent->read_hunk(hunknum, dest); - else - memset(dest, 0, m_hunkbytes); - return CHDERR_NONE; - }*/ + throw CHDERR_REQUIRES_PARENT; */ + } else if (chd->parent) { + err = hunk_read_into_memory(chd->parent, hunknum, dest); + if (err != CHDERR_NONE) + return err; + } else { + memset(dest, 0, chd->header.hunkbytes); + } + } - // compressed case + /* compressed case */ blocklen = get_bigendian_uint24(&rawmap[1]); blockoffs = get_bigendian_uint48(&rawmap[4]); blockcrc = get_bigendian_uint16(&rawmap[10]); + void* codec = NULL; switch (rawmap[0]) { case COMPRESSION_TYPE_0: case COMPRESSION_TYPE_1: case COMPRESSION_TYPE_2: case COMPRESSION_TYPE_3: - bytes = read_compressed(chd, blockoffs, blocklen); - if (bytes == NULL) + compressed_bytes = hunk_read_compressed(chd, blockoffs, blocklen); + if (compressed_bytes == NULL) return CHDERR_READ_ERROR; switch (chd->codecintf[rawmap[0]]->compression) { @@ -2173,6 +2198,10 @@ static chd_error hunk_read_into_memory(chd_file *chd, UINT32 hunknum, UINT8 *des codec = &chd->cdlz_codec_data; break; + case CHD_CODEC_ZLIB: + codec = &chd->zlib_codec_data; + break; + case CHD_CODEC_CD_ZLIB: codec = &chd->cdzl_codec_data; break; @@ -2183,13 +2212,13 @@ static chd_error hunk_read_into_memory(chd_file *chd, UINT32 hunknum, UINT8 *des } if (codec==NULL) return CHDERR_DECOMPRESSION_ERROR; - chd->codecintf[rawmap[0]]->decompress(codec, bytes, blocklen, dest, chd->header.hunkbytes); + chd->codecintf[rawmap[0]]->decompress(codec, compressed_bytes, blocklen, dest, chd->header.hunkbytes); if (dest != NULL && crc16(dest, chd->header.hunkbytes) != blockcrc) return CHDERR_DECOMPRESSION_ERROR; return CHDERR_NONE; case COMPRESSION_NONE: - err = read_uncompressed(chd, blockoffs, blocklen, dest); + err = hunk_read_uncompressed(chd, blockoffs, blocklen, dest); if (err != CHDERR_NONE) return err; if (crc16(dest, chd->header.hunkbytes) != blockcrc) @@ -2200,20 +2229,21 @@ static chd_error hunk_read_into_memory(chd_file *chd, UINT32 hunknum, UINT8 *des return hunk_read_into_memory(chd, blockoffs, dest); case COMPRESSION_PARENT: - // TODO - //if (m_parent_missing) - // return CHDERR_REQUIRES_PARENT; - //return m_parent->read_bytes(uint64_t(blockoffs) * uint64_t(m_parent->unit_bytes()), dest, m_hunkbytes); +#if 0 + /* TODO */ + if (m_parent_missing) + return CHDERR_REQUIRES_PARENT; + return m_parent->read_bytes(uint64_t(blockoffs) * uint64_t(m_parent->unit_bytes()), dest, m_hunkbytes); +#endif return CHDERR_DECOMPRESSION_ERROR; } return CHDERR_NONE; } - // We should not reach this code + /* We should not reach this code */ return CHDERR_DECOMPRESSION_ERROR; } - /*************************************************************************** INTERNAL MAP ACCESS ***************************************************************************/ @@ -2299,9 +2329,6 @@ cleanup: return err; } - - - /*************************************************************************** INTERNAL METADATA ACCESS ***************************************************************************/ @@ -2351,8 +2378,6 @@ static chd_error metadata_find_entry(chd_file *chd, UINT32 metatag, UINT32 metai return CHDERR_METADATA_NOT_FOUND; } - - /*************************************************************************** ZLIB COMPRESSION CODEC ***************************************************************************/ @@ -2393,7 +2418,6 @@ static chd_error zlib_codec_init(void *codec, uint32_t hunkbytes) return err; } - /*------------------------------------------------- zlib_codec_free - free data for the ZLIB codec @@ -2407,19 +2431,17 @@ static void zlib_codec_free(void *codec) if (data != NULL) { int i; - zlib_allocator alloc; inflateEnd(&data->inflater); /* free our fast memory */ - alloc = data->allocator; + zlib_allocator alloc = data->allocator; for (i = 0; i < MAX_ZLIB_ALLOCS; i++) if (alloc.allocptr[i]) free(alloc.allocptr[i]); } } - /*------------------------------------------------- zlib_codec_decompress - decomrpess data using the ZLIB codec @@ -2449,7 +2471,6 @@ static chd_error zlib_codec_decompress(void *codec, const uint8_t *src, uint32_t return CHDERR_NONE; } - /*------------------------------------------------- zlib_fast_alloc - fast malloc for ZLIB, which allocates and frees memory frequently @@ -2477,7 +2498,7 @@ static voidpf zlib_fast_alloc(voidpf opaque, uInt items, uInt size) } /* alloc a new one */ - ptr = (UINT32 *)malloc(size + sizeof(UINT32)); + ptr = (UINT32 *)malloc(size + sizeof(uintptr_t)); if (!ptr) return NULL; @@ -2491,10 +2512,9 @@ static voidpf zlib_fast_alloc(voidpf opaque, uInt items, uInt size) /* set the low bit of the size so we don't match next time */ *ptr = size | 1; - return ptr + 1; + return ptr + (sizeof(uint32_t) == sizeof(uintptr_t) ? 1 : 2); } - /*------------------------------------------------- zlib_fast_free - fast free for ZLIB, which allocates and frees memory frequently @@ -2503,7 +2523,7 @@ static voidpf zlib_fast_alloc(voidpf opaque, uInt items, uInt size) static void zlib_fast_free(voidpf opaque, voidpf address) { zlib_allocator *alloc = (zlib_allocator *)opaque; - UINT32 *ptr = (UINT32 *)address - 1; + UINT32 *ptr = (UINT32 *)address - (sizeof(uint32_t) == sizeof(uintptr_t) ? 1 : 2); int i; /* find the hunk */ diff --git a/deps/libchdr/chd.h b/deps/libchdr/chd.h index 37aeab4..444a0d8 100644 --- a/deps/libchdr/chd.h +++ b/deps/libchdr/chd.h @@ -194,12 +194,21 @@ extern "C" { #define CHDFLAGS_IS_WRITEABLE 0x00000002 #define CHDFLAGS_UNDEFINED 0xfffffffc +#define CHD_MAKE_TAG(a,b,c,d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d)) + /* compression types */ #define CHDCOMPRESSION_NONE 0 #define CHDCOMPRESSION_ZLIB 1 #define CHDCOMPRESSION_ZLIB_PLUS 2 #define CHDCOMPRESSION_AV 3 +#define CHD_CODEC_NONE 0 +#define CHD_CODEC_ZLIB CHD_MAKE_TAG('z','l','i','b') +/* general codecs with CD frontend */ +#define CHD_CODEC_CD_ZLIB CHD_MAKE_TAG('c','d','z','l') +#define CHD_CODEC_CD_LZMA CHD_MAKE_TAG('c','d','l','z') +#define CHD_CODEC_CD_FLAC CHD_MAKE_TAG('c','d','f','l') + /* A/V codec configuration parameters */ #define AV_CODEC_COMPRESS_CONFIG 1 #define AV_CODEC_DECOMPRESS_CONFIG 2 @@ -212,33 +221,34 @@ extern "C" { #define CHD_MDFLAGS_CHECKSUM 0x01 /* indicates data is checksummed */ /* standard hard disk metadata */ -#define HARD_DISK_METADATA_TAG 0x47444444 /* 'GDDD' */ +#define HARD_DISK_METADATA_TAG CHD_MAKE_TAG('G','D','D','D') #define HARD_DISK_METADATA_FORMAT "CYLS:%d,HEADS:%d,SECS:%d,BPS:%d" /* hard disk identify information */ -#define HARD_DISK_IDENT_METADATA_TAG 0x49444e54 /* 'IDNT' */ +#define HARD_DISK_IDENT_METADATA_TAG CHD_MAKE_TAG('I','D','N','T') /* hard disk key information */ -#define HARD_DISK_KEY_METADATA_TAG 0x4b455920 /* 'KEY ' */ +#define HARD_DISK_KEY_METADATA_TAG CHD_MAKE_TAG('K','E','Y',' ') /* pcmcia CIS information */ -#define PCMCIA_CIS_METADATA_TAG 0x43495320 /* 'CIS ' */ +#define PCMCIA_CIS_METADATA_TAG CHD_MAKE_TAG('C','I','S',' ') /* standard CD-ROM metadata */ -#define CDROM_OLD_METADATA_TAG 0x43484344 /* 'CHCD' */ -#define CDROM_TRACK_METADATA_TAG 0x43485452 /* 'CHTR' */ +#define CDROM_OLD_METADATA_TAG CHD_MAKE_TAG('C','H','C','D') +#define CDROM_TRACK_METADATA_TAG CHD_MAKE_TAG('C','H','T','R') #define CDROM_TRACK_METADATA_FORMAT "TRACK:%d TYPE:%s SUBTYPE:%s FRAMES:%d" -#define CDROM_TRACK_METADATA2_TAG 0x43485432 /* 'CHT2' */ +#define CDROM_TRACK_METADATA2_TAG CHD_MAKE_TAG('C','H','T','2') #define CDROM_TRACK_METADATA2_FORMAT "TRACK:%d TYPE:%s SUBTYPE:%s FRAMES:%d PREGAP:%d PGTYPE:%s PGSUB:%s POSTGAP:%d" -#define GDROM_TRACK_METADATA_TAG 0x43484744 /* 'CHTD' */ +#define GDROM_OLD_METADATA_TAG CHD_MAKE_TAG('C','H','G','T') +#define GDROM_TRACK_METADATA_TAG CHD_MAKE_TAG('C', 'H', 'G', 'D') #define GDROM_TRACK_METADATA_FORMAT "TRACK:%d TYPE:%s SUBTYPE:%s FRAMES:%d PAD:%d PREGAP:%d PGTYPE:%s PGSUB:%s POSTGAP:%d" /* standard A/V metadata */ -#define AV_METADATA_TAG 0x41564156 /* 'AVAV' */ +#define AV_METADATA_TAG CHD_MAKE_TAG('A','V','A','V') #define AV_METADATA_FORMAT "FPS:%d.%06d WIDTH:%d HEIGHT:%d INTERLACED:%d CHANNELS:%d SAMPLERATE:%d" /* A/V laserdisc frame metadata */ -#define AV_LD_METADATA_TAG 0x41564C44 /* 'AVLD' */ +#define AV_LD_METADATA_TAG CHD_MAKE_TAG('A','V','L','D') /* CHD open values */ #define CHD_OPEN_READ 1 @@ -305,14 +315,14 @@ struct _chd_header UINT8 parentmd5[CHD_MD5_BYTES]; /* overall MD5 checksum of parent */ UINT8 sha1[CHD_SHA1_BYTES]; /* overall SHA1 checksum */ UINT8 rawsha1[CHD_SHA1_BYTES]; /* SHA1 checksum of raw data */ - UINT8 parentsha1[CHD_SHA1_BYTES]; /* overall SHA1 checksum of parent */ + UINT8 parentsha1[CHD_SHA1_BYTES]; /* overall SHA1 checksum of parent */ UINT32 unitbytes; /* TODO V5 */ - UINT64 unitcount; /* TODO V5 */ + UINT64 unitcount; /* TODO V5 */ UINT32 hunkcount; /* TODO V5 */ - // map information - UINT32 mapentrybytes; // length of each entry in a map (V5) - UINT8* rawmap; // raw map data + /* map information */ + UINT32 mapentrybytes; /* length of each entry in a map (V5) */ + UINT8* rawmap; /* raw map data */ UINT32 obsolete_cylinders; /* obsolete field -- do not use! */ UINT32 obsolete_sectors; /* obsolete field -- do not use! */ @@ -341,10 +351,10 @@ struct _chd_verify_result /* ----- CHD file management ----- */ /* create a new CHD file fitting the given description */ -// chd_error chd_create(const char *filename, UINT64 logicalbytes, UINT32 hunkbytes, UINT32 compression, chd_file *parent); +/* chd_error chd_create(const char *filename, UINT64 logicalbytes, UINT32 hunkbytes, UINT32 compression, chd_file *parent); */ /* same as chd_create(), but accepts an already-opened core_file object */ -// chd_error chd_create_file(core_file *file, UINT64 logicalbytes, UINT32 hunkbytes, UINT32 compression, chd_file *parent); +/* chd_error chd_create_file(core_file *file, UINT64 logicalbytes, UINT32 hunkbytes, UINT32 compression, chd_file *parent); */ /* open an existing CHD file */ chd_error chd_open(const char *filename, int mode, chd_file *parent, chd_file **chd); diff --git a/deps/libchdr/coretypes.h b/deps/libchdr/coretypes.h index 6264bea..5aecc14 100644 --- a/deps/libchdr/coretypes.h +++ b/deps/libchdr/coretypes.h @@ -4,10 +4,6 @@ #include #include -#ifdef __LIBRETRO__ -#include -#endif - #define ARRAY_LENGTH(x) (sizeof(x)/sizeof(x[0])) typedef uint64_t UINT64; @@ -26,15 +22,13 @@ typedef int8_t INT8; #define core_fread(fc, buff, len) fread(buff, 1, len, fc) #define core_fclose fclose #define core_ftell ftell - -static size_t core_fsize(core_file* f) +static size_t core_fsize(core_file *f) { - size_t rv; - size_t p = ftell(f); - fseek(f, 0, SEEK_END); - rv = ftell(f); - fseek(f, p, SEEK_SET); - return rv; + long p = ftell(f); + fseek(f, 0, SEEK_END); + long rv = ftell(f); + fseek(f, p, SEEK_SET); + return rv; } #endif diff --git a/deps/libchdr/flac.c b/deps/libchdr/flac.c index 29844b6..8e31ed6 100644 --- a/deps/libchdr/flac.c +++ b/deps/libchdr/flac.c @@ -1,331 +1,331 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - flac.c - - FLAC compression wrappers - -***************************************************************************/ - -#include -#include -#include "flac.h" - -//************************************************************************** -// FLAC DECODER -//************************************************************************** - -static FLAC__StreamDecoderReadStatus flac_decoder_read_callback_static(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data); -FLAC__StreamDecoderReadStatus flac_decoder_read_callback(void* client_data, FLAC__byte buffer[], size_t *bytes); -static void flac_decoder_metadata_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); -static FLAC__StreamDecoderTellStatus flac_decoder_tell_callback_static(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data); -static FLAC__StreamDecoderWriteStatus flac_decoder_write_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); -FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(void* client_data, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]); -static void flac_decoder_error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); - -// getters (valid after reset) -static uint32_t sample_rate(flac_decoder *decoder) { return decoder->sample_rate; } -static uint8_t channels(flac_decoder *decoder) { return decoder->channels; } -static uint8_t bits_per_sample(flac_decoder *decoder) { return decoder->bits_per_sample; } -static uint32_t total_samples(flac_decoder *decoder) { return FLAC__stream_decoder_get_total_samples(decoder->decoder); } -static FLAC__StreamDecoderState state(flac_decoder *decoder) { return FLAC__stream_decoder_get_state(decoder->decoder); } -static const char *state_string(flac_decoder *decoder) { return FLAC__stream_decoder_get_resolved_state_string(decoder->decoder); } - -//------------------------------------------------- -// flac_decoder - constructor -//------------------------------------------------- - -void flac_decoder_init(flac_decoder *decoder) -{ - decoder->decoder = FLAC__stream_decoder_new(); - decoder->sample_rate = 0; - decoder->channels = 0; - decoder->bits_per_sample = 0; - decoder->compressed_offset = 0; - decoder->compressed_start = NULL; - decoder->compressed_length = 0; - decoder->compressed2_start = NULL; - decoder->compressed2_length = 0; - decoder->uncompressed_offset = 0; - decoder->uncompressed_length = 0; - decoder->uncompressed_swap = 0; -} - -//------------------------------------------------- -// flac_decoder - destructor -//------------------------------------------------- - -void flac_decoder_free(flac_decoder* decoder) -{ - if ((decoder != NULL) && (decoder->decoder != NULL)) - FLAC__stream_decoder_delete(decoder->decoder); -} - - -//------------------------------------------------- -// reset - reset state with the original -// parameters -//------------------------------------------------- - -static int flac_decoder_internal_reset(flac_decoder* decoder) -{ - decoder->compressed_offset = 0; - if (FLAC__stream_decoder_init_stream(decoder->decoder, - &flac_decoder_read_callback_static, - NULL, - &flac_decoder_tell_callback_static, - NULL, - NULL, - &flac_decoder_write_callback_static, - &flac_decoder_metadata_callback_static, - &flac_decoder_error_callback_static, decoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) - return 0; - return FLAC__stream_decoder_process_until_end_of_metadata(decoder->decoder); -} - - - -//------------------------------------------------- -// reset - reset state with new memory parameters -// and a custom-generated header -//------------------------------------------------- - -int flac_decoder_reset(flac_decoder* decoder, uint32_t sample_rate, uint8_t num_channels, uint32_t block_size, const void *buffer, uint32_t length) -{ - // modify the template header with our parameters - static const uint8_t s_header_template[0x2a] = - { - 0x66, 0x4C, 0x61, 0x43, // +00: 'fLaC' stream header - 0x80, // +04: metadata block type 0 (STREAMINFO), - // flagged as last block - 0x00, 0x00, 0x22, // +05: metadata block length = 0x22 - 0x00, 0x00, // +08: minimum block size - 0x00, 0x00, // +0A: maximum block size - 0x00, 0x00, 0x00, // +0C: minimum frame size (0 == unknown) - 0x00, 0x00, 0x00, // +0F: maximum frame size (0 == unknown) - 0x0A, 0xC4, 0x42, 0xF0, 0x00, 0x00, 0x00, 0x00, // +12: sample rate (0x0ac44 == 44100), - // numchannels (2), sample bits (16), - // samples in stream (0 == unknown) - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // +1A: MD5 signature (0 == none) - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // - // +2A: start of stream data - }; - memcpy(decoder->custom_header, s_header_template, sizeof(s_header_template)); - decoder->custom_header[0x08] = decoder->custom_header[0x0a] = block_size >> 8; - decoder->custom_header[0x09] = decoder->custom_header[0x0b] = block_size & 0xff; - decoder->custom_header[0x12] = sample_rate >> 12; - decoder->custom_header[0x13] = sample_rate >> 4; - decoder->custom_header[0x14] = (sample_rate << 4) | ((num_channels - 1) << 1); - - // configure the header ahead of the provided buffer - decoder->compressed_start = (const FLAC__byte *)(decoder->custom_header); - decoder->compressed_length = sizeof(decoder->custom_header); - decoder->compressed2_start = (const FLAC__byte *)(buffer); - decoder->compressed2_length = length; - return flac_decoder_internal_reset(decoder); -} - - -//------------------------------------------------- -// decode_interleaved - decode to an interleaved -// sound stream -//------------------------------------------------- - -int flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian) -{ - // configure the uncompressed buffer - memset(decoder->uncompressed_start, 0, sizeof(decoder->uncompressed_start)); - decoder->uncompressed_start[0] = samples; - decoder->uncompressed_offset = 0; - decoder->uncompressed_length = num_samples; - decoder->uncompressed_swap = swap_endian; - - // loop until we get everything we want - while (decoder->uncompressed_offset < decoder->uncompressed_length) - if (!FLAC__stream_decoder_process_single(decoder->decoder)) - return 0; - return 1; -} - - -/* -//------------------------------------------------- -// decode - decode to an multiple independent -// data streams -//------------------------------------------------- - -bool flac_decoder::decode(int16_t **samples, uint32_t num_samples, bool swap_endian) -{ - // make sure we don't have too many channels - int chans = channels(); - if (chans > ARRAY_LENGTH(m_uncompressed_start)) - return false; - - // configure the uncompressed buffer - memset(m_uncompressed_start, 0, sizeof(m_uncompressed_start)); - for (int curchan = 0; curchan < chans; curchan++) - m_uncompressed_start[curchan] = samples[curchan]; - m_uncompressed_offset = 0; - m_uncompressed_length = num_samples; - m_uncompressed_swap = swap_endian; - - // loop until we get everything we want - while (m_uncompressed_offset < m_uncompressed_length) - if (!FLAC__stream_decoder_process_single(m_decoder)) - return false; - return true; -} -*/ - -//------------------------------------------------- -// finish - finish up the decode -//------------------------------------------------- - -uint32_t flac_decoder_finish(flac_decoder* decoder) -{ - // get the final decoding position and move forward - FLAC__uint64 position = 0; - FLAC__stream_decoder_get_decode_position(decoder->decoder, &position); - FLAC__stream_decoder_finish(decoder->decoder); - - // adjust position if we provided the header - if (position == 0) - return 0; - if (decoder->compressed_start == (const FLAC__byte *)(decoder->custom_header)) - position -= decoder->compressed_length; - return position; -} - - -//------------------------------------------------- -// read_callback - handle reads from the input -// stream -//------------------------------------------------- - -#define MIN(x, y) ((x) < (y) ? (x) : (y)) - -FLAC__StreamDecoderReadStatus flac_decoder_read_callback_static(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data) -{ - return flac_decoder_read_callback(client_data, buffer, bytes); -} - -FLAC__StreamDecoderReadStatus flac_decoder_read_callback(void* client_data, FLAC__byte buffer[], size_t *bytes) -{ - flac_decoder* decoder = (flac_decoder*)client_data; - - uint32_t expected = *bytes; - - // copy from primary buffer first - uint32_t outputpos = 0; - if (outputpos < *bytes && decoder->compressed_offset < decoder->compressed_length) - { - uint32_t bytes_to_copy = MIN(*bytes - outputpos, decoder->compressed_length - decoder->compressed_offset); - memcpy(&buffer[outputpos], decoder->compressed_start + decoder->compressed_offset, bytes_to_copy); - outputpos += bytes_to_copy; - decoder->compressed_offset += bytes_to_copy; - } - - // once we're out of that, copy from the secondary buffer - if (outputpos < *bytes && decoder->compressed_offset < decoder->compressed_length + decoder->compressed2_length) - { - uint32_t bytes_to_copy = MIN(*bytes - outputpos, decoder->compressed2_length - (decoder->compressed_offset - decoder->compressed_length)); - memcpy(&buffer[outputpos], decoder->compressed2_start + decoder->compressed_offset - decoder->compressed_length, bytes_to_copy); - outputpos += bytes_to_copy; - decoder->compressed_offset += bytes_to_copy; - } - *bytes = outputpos; - - // return based on whether we ran out of data - return (*bytes < expected) ? FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM : FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; -} - - -//------------------------------------------------- -// metadata_callback - handle STREAMINFO metadata -//------------------------------------------------- - -void flac_decoder_metadata_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) -{ - flac_decoder *fldecoder; - // ignore all but STREAMINFO metadata - if (metadata->type != FLAC__METADATA_TYPE_STREAMINFO) - return; - - // parse out the data we care about - fldecoder = (flac_decoder *)(client_data); - fldecoder->sample_rate = metadata->data.stream_info.sample_rate; - fldecoder->bits_per_sample = metadata->data.stream_info.bits_per_sample; - fldecoder->channels = metadata->data.stream_info.channels; -} - - -//------------------------------------------------- -// tell_callback - handle requests to find out -// where in the input stream we are -//------------------------------------------------- - -FLAC__StreamDecoderTellStatus flac_decoder_tell_callback_static(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data) -{ - *absolute_byte_offset = ((flac_decoder *)client_data)->compressed_offset; - return FLAC__STREAM_DECODER_TELL_STATUS_OK; -} - - -//------------------------------------------------- -// write_callback - handle writes to the output -// stream -//------------------------------------------------- - -FLAC__StreamDecoderWriteStatus flac_decoder_write_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) -{ - return flac_decoder_write_callback(client_data, frame, buffer); -} - -FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(void *client_data, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]) -{ - int shift, blocksize; - flac_decoder * decoder = (flac_decoder *)client_data; - - assert(frame->header.channels == channels(decoder)); - - // interleaved case - shift = decoder->uncompressed_swap ? 8 : 0; - blocksize = frame->header.blocksize; - - if (decoder->uncompressed_start[1] == NULL) - { - int sampnum, chan; - int16_t *dest = decoder->uncompressed_start[0] + decoder->uncompressed_offset * frame->header.channels; - for (sampnum = 0; sampnum < blocksize && decoder->uncompressed_offset < decoder->uncompressed_length; sampnum++, decoder->uncompressed_offset++) - for (chan = 0; chan < frame->header.channels; chan++) - *dest++ = (int16_t)((((uint16_t)buffer[chan][sampnum]) << shift) | (((uint16_t)buffer[chan][sampnum]) >> shift)); - } - - // non-interleaved case - else - { - int sampnum, chan; - for (sampnum = 0; sampnum < blocksize && decoder->uncompressed_offset < decoder->uncompressed_length; sampnum++, decoder->uncompressed_offset++) - for (chan = 0; chan < frame->header.channels; chan++) - if (decoder->uncompressed_start[chan] != NULL) - decoder->uncompressed_start[chan][decoder->uncompressed_offset] = (int16_t) ( (((uint16_t)(buffer[chan][sampnum])) << shift) | ( ((uint16_t)(buffer[chan][sampnum])) >> shift) ); - } - return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; -} - -/** - * @fn void flac_decoder::error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) - * - * @brief ------------------------------------------------- - * error_callback - handle errors (ignore them) - * -------------------------------------------------. - * - * @param decoder The decoder. - * @param status The status. - * @param [in,out] client_data If non-null, information describing the client. - */ - -void flac_decoder_error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) -{ -} +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +*************************************************************************** + + flac.c + + FLAC compression wrappers + +***************************************************************************/ + +#include +#include +#include "flac.h" + +/*************************************************************************** + * FLAC DECODER + *************************************************************************** + */ + +static FLAC__StreamDecoderReadStatus flac_decoder_read_callback_static(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data); +FLAC__StreamDecoderReadStatus flac_decoder_read_callback(void* client_data, FLAC__byte buffer[], size_t *bytes); +static void flac_decoder_metadata_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); +static FLAC__StreamDecoderTellStatus flac_decoder_tell_callback_static(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data); +static FLAC__StreamDecoderWriteStatus flac_decoder_write_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); +FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(void* client_data, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]); +static void flac_decoder_error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); + +/* getters (valid after reset) */ +static uint32_t sample_rate(flac_decoder *decoder) { return decoder->sample_rate; } +static uint8_t channels(flac_decoder *decoder) { return decoder->channels; } +static uint8_t bits_per_sample(flac_decoder *decoder) { return decoder->bits_per_sample; } +static uint32_t total_samples(flac_decoder *decoder) { return FLAC__stream_decoder_get_total_samples(decoder->decoder); } +static FLAC__StreamDecoderState state(flac_decoder *decoder) { return FLAC__stream_decoder_get_state(decoder->decoder); } +static const char *state_string(flac_decoder *decoder) { return FLAC__stream_decoder_get_resolved_state_string(decoder->decoder); } + +/*------------------------------------------------- + * flac_decoder - constructor + *------------------------------------------------- + */ + +void flac_decoder_init(flac_decoder *decoder) +{ + decoder->decoder = FLAC__stream_decoder_new(); + decoder->sample_rate = 0; + decoder->channels = 0; + decoder->bits_per_sample = 0; + decoder->compressed_offset = 0; + decoder->compressed_start = NULL; + decoder->compressed_length = 0; + decoder->compressed2_start = NULL; + decoder->compressed2_length = 0; + decoder->uncompressed_offset = 0; + decoder->uncompressed_length = 0; + decoder->uncompressed_swap = 0; +} + +/*------------------------------------------------- + * flac_decoder - destructor + *------------------------------------------------- + */ + +void flac_decoder_free(flac_decoder* decoder) +{ + if ((decoder != NULL) && (decoder->decoder != NULL)) + FLAC__stream_decoder_delete(decoder->decoder); +} + +/*------------------------------------------------- + * reset - reset state with the original + * parameters + *------------------------------------------------- + */ + +static int flac_decoder_internal_reset(flac_decoder* decoder) +{ + decoder->compressed_offset = 0; + if (FLAC__stream_decoder_init_stream(decoder->decoder, + &flac_decoder_read_callback_static, + NULL, + &flac_decoder_tell_callback_static, + NULL, + NULL, + &flac_decoder_write_callback_static, + &flac_decoder_metadata_callback_static, + &flac_decoder_error_callback_static, decoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) + return 0; + return FLAC__stream_decoder_process_until_end_of_metadata(decoder->decoder); +} + +/*------------------------------------------------- + * reset - reset state with new memory parameters + * and a custom-generated header + *------------------------------------------------- + */ + +int flac_decoder_reset(flac_decoder* decoder, uint32_t sample_rate, uint8_t num_channels, uint32_t block_size, const void *buffer, uint32_t length) +{ + /* modify the template header with our parameters */ + static const uint8_t s_header_template[0x2a] = + { + 0x66, 0x4C, 0x61, 0x43, /* +00: 'fLaC' stream header */ + 0x80, /* +04: metadata block type 0 (STREAMINFO), */ + /* flagged as last block */ + 0x00, 0x00, 0x22, /* +05: metadata block length = 0x22 */ + 0x00, 0x00, /* +08: minimum block size */ + 0x00, 0x00, /* +0A: maximum block size */ + 0x00, 0x00, 0x00, /* +0C: minimum frame size (0 == unknown) */ + 0x00, 0x00, 0x00, /* +0F: maximum frame size (0 == unknown) */ + 0x0A, 0xC4, 0x42, 0xF0, 0x00, 0x00, 0x00, 0x00, /* +12: sample rate (0x0ac44 == 44100), */ + /* numchannels (2), sample bits (16), */ + /* samples in stream (0 == unknown) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* +1A: MD5 signature (0 == none) */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* +2A: start of stream data */ + }; + memcpy(decoder->custom_header, s_header_template, sizeof(s_header_template)); + decoder->custom_header[0x08] = decoder->custom_header[0x0a] = block_size >> 8; + decoder->custom_header[0x09] = decoder->custom_header[0x0b] = block_size & 0xff; + decoder->custom_header[0x12] = sample_rate >> 12; + decoder->custom_header[0x13] = sample_rate >> 4; + decoder->custom_header[0x14] = (sample_rate << 4) | ((num_channels - 1) << 1); + + /* configure the header ahead of the provided buffer */ + decoder->compressed_start = (const FLAC__byte *)(decoder->custom_header); + decoder->compressed_length = sizeof(decoder->custom_header); + decoder->compressed2_start = (const FLAC__byte *)(buffer); + decoder->compressed2_length = length; + return flac_decoder_internal_reset(decoder); +} + +/*------------------------------------------------- + * decode_interleaved - decode to an interleaved + * sound stream + *------------------------------------------------- + */ + +int flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian) +{ + /* configure the uncompressed buffer */ + memset(decoder->uncompressed_start, 0, sizeof(decoder->uncompressed_start)); + decoder->uncompressed_start[0] = samples; + decoder->uncompressed_offset = 0; + decoder->uncompressed_length = num_samples; + decoder->uncompressed_swap = swap_endian; + + /* loop until we get everything we want */ + while (decoder->uncompressed_offset < decoder->uncompressed_length) + if (!FLAC__stream_decoder_process_single(decoder->decoder)) + return 0; + return 1; +} + +#if 0 +/*------------------------------------------------- + * decode - decode to an multiple independent + * data streams + *------------------------------------------------- + */ + +bool flac_decoder::decode(int16_t **samples, uint32_t num_samples, bool swap_endian) +{ + /* make sure we don't have too many channels */ + int chans = channels(); + if (chans > ARRAY_LENGTH(m_uncompressed_start)) + return false; + + /* configure the uncompressed buffer */ + memset(m_uncompressed_start, 0, sizeof(m_uncompressed_start)); + for (int curchan = 0; curchan < chans; curchan++) + m_uncompressed_start[curchan] = samples[curchan]; + m_uncompressed_offset = 0; + m_uncompressed_length = num_samples; + m_uncompressed_swap = swap_endian; + + /* loop until we get everything we want */ + while (m_uncompressed_offset < m_uncompressed_length) + if (!FLAC__stream_decoder_process_single(m_decoder)) + return false; + return true; +} +#endif + +/*------------------------------------------------- + * finish - finish up the decode + *------------------------------------------------- + */ + +uint32_t flac_decoder_finish(flac_decoder* decoder) +{ + /* get the final decoding position and move forward */ + FLAC__uint64 position = 0; + FLAC__stream_decoder_get_decode_position(decoder->decoder, &position); + FLAC__stream_decoder_finish(decoder->decoder); + + /* adjust position if we provided the header */ + if (position == 0) + return 0; + if (decoder->compressed_start == (const FLAC__byte *)(decoder->custom_header)) + position -= decoder->compressed_length; + return position; +} + +/*------------------------------------------------- + * read_callback - handle reads from the input + * stream + *------------------------------------------------- + */ + +#define MIN(x, y) ((x) < (y) ? (x) : (y)) + +FLAC__StreamDecoderReadStatus flac_decoder_read_callback_static(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data) +{ + return flac_decoder_read_callback(client_data, buffer, bytes); +} + +FLAC__StreamDecoderReadStatus flac_decoder_read_callback(void* client_data, FLAC__byte buffer[], size_t *bytes) +{ + flac_decoder* decoder = (flac_decoder*)client_data; + + uint32_t expected = *bytes; + + /* copy from primary buffer first */ + uint32_t outputpos = 0; + if (outputpos < *bytes && decoder->compressed_offset < decoder->compressed_length) + { + uint32_t bytes_to_copy = MIN(*bytes - outputpos, decoder->compressed_length - decoder->compressed_offset); + memcpy(&buffer[outputpos], decoder->compressed_start + decoder->compressed_offset, bytes_to_copy); + outputpos += bytes_to_copy; + decoder->compressed_offset += bytes_to_copy; + } + + /* once we're out of that, copy from the secondary buffer */ + if (outputpos < *bytes && decoder->compressed_offset < decoder->compressed_length + decoder->compressed2_length) + { + uint32_t bytes_to_copy = MIN(*bytes - outputpos, decoder->compressed2_length - (decoder->compressed_offset - decoder->compressed_length)); + memcpy(&buffer[outputpos], decoder->compressed2_start + decoder->compressed_offset - decoder->compressed_length, bytes_to_copy); + outputpos += bytes_to_copy; + decoder->compressed_offset += bytes_to_copy; + } + *bytes = outputpos; + + /* return based on whether we ran out of data */ + return (*bytes < expected) ? FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM : FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; +} + +/*------------------------------------------------- + * metadata_callback - handle STREAMINFO metadata + *------------------------------------------------- + */ + +void flac_decoder_metadata_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) +{ + flac_decoder *fldecoder; + /* ignore all but STREAMINFO metadata */ + if (metadata->type != FLAC__METADATA_TYPE_STREAMINFO) + return; + + /* parse out the data we care about */ + fldecoder = (flac_decoder *)(client_data); + fldecoder->sample_rate = metadata->data.stream_info.sample_rate; + fldecoder->bits_per_sample = metadata->data.stream_info.bits_per_sample; + fldecoder->channels = metadata->data.stream_info.channels; +} + +/*------------------------------------------------- + * tell_callback - handle requests to find out + * where in the input stream we are + *------------------------------------------------- + */ + +FLAC__StreamDecoderTellStatus flac_decoder_tell_callback_static(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data) +{ + *absolute_byte_offset = ((flac_decoder *)client_data)->compressed_offset; + return FLAC__STREAM_DECODER_TELL_STATUS_OK; +} + +/*------------------------------------------------- + * write_callback - handle writes to the output + * stream + *------------------------------------------------- + */ + +FLAC__StreamDecoderWriteStatus flac_decoder_write_callback_static(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) +{ + return flac_decoder_write_callback(client_data, frame, buffer); +} + +FLAC__StreamDecoderWriteStatus flac_decoder_write_callback(void *client_data, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]) +{ + int sampnum, chan; + int shift, blocksize; + flac_decoder * decoder = (flac_decoder *)client_data; + + assert(frame->header.channels == channels(decoder)); + + /* interleaved case */ + shift = decoder->uncompressed_swap ? 8 : 0; + blocksize = frame->header.blocksize; + if (decoder->uncompressed_start[1] == NULL) + { + int16_t *dest = decoder->uncompressed_start[0] + decoder->uncompressed_offset * frame->header.channels; + for (sampnum = 0; sampnum < blocksize && decoder->uncompressed_offset < decoder->uncompressed_length; sampnum++, decoder->uncompressed_offset++) + for (chan = 0; chan < frame->header.channels; chan++) + *dest++ = (int16_t)((((uint16_t)buffer[chan][sampnum]) << shift) | (((uint16_t)buffer[chan][sampnum]) >> shift)); + } + + /* non-interleaved case */ + else + { + for (sampnum = 0; sampnum < blocksize && decoder->uncompressed_offset < decoder->uncompressed_length; sampnum++, decoder->uncompressed_offset++) + for (chan = 0; chan < frame->header.channels; chan++) + if (decoder->uncompressed_start[chan] != NULL) + decoder->uncompressed_start[chan][decoder->uncompressed_offset] = (int16_t) ( (((uint16_t)(buffer[chan][sampnum])) << shift) | ( ((uint16_t)(buffer[chan][sampnum])) >> shift) ); + } + return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; +} + +/** + * @fn void flac_decoder::error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) + * + * @brief ------------------------------------------------- + * error_callback - handle errors (ignore them) + * -------------------------------------------------. + * + * @param decoder The decoder. + * @param status The status. + * @param [in,out] client_data If non-null, information describing the client. + */ + +void flac_decoder_error_callback_static(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) +{ +} diff --git a/deps/libchdr/flac.h b/deps/libchdr/flac.h index 23e91a9..6cf011f 100644 --- a/deps/libchdr/flac.h +++ b/deps/libchdr/flac.h @@ -1,50 +1,51 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - flac.h - - FLAC compression wrappers - -***************************************************************************/ - -#pragma once - -#ifndef __FLAC_H__ -#define __FLAC_H__ - -#include -#include "FLAC/all.h" - -//************************************************************************** -// TYPE DEFINITIONS -//************************************************************************** - -typedef struct _flac_decoder flac_decoder; -struct _flac_decoder { - // output state - FLAC__StreamDecoder* decoder; // actual encoder - uint32_t sample_rate; // decoded sample rate - uint8_t channels; // decoded number of channels - uint8_t bits_per_sample; // decoded bits per sample - uint32_t compressed_offset; // current offset in compressed data - const FLAC__byte * compressed_start; // start of compressed data - uint32_t compressed_length; // length of compressed data - const FLAC__byte * compressed2_start; // start of compressed data - uint32_t compressed2_length; // length of compressed data - int16_t * uncompressed_start[8]; // pointer to start of uncompressed data (up to 8 streams) - uint32_t uncompressed_offset; // current position in uncompressed data - uint32_t uncompressed_length; // length of uncompressed data - int uncompressed_swap; // swap uncompressed sample data - uint8_t custom_header[0x2a]; // custom header -}; - -// ======================> flac_decoder - -void flac_decoder_init(flac_decoder* decoder); -void flac_decoder_free(flac_decoder* decoder); -int flac_decoder_reset(flac_decoder* decoder, uint32_t sample_rate, uint8_t num_channels, uint32_t block_size, const void *buffer, uint32_t length); -int flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian); -uint32_t flac_decoder_finish(flac_decoder* decoder); - -#endif // __FLAC_H__ +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles + *************************************************************************** + + flac.h + + FLAC compression wrappers + +***************************************************************************/ + +#pragma once + +#ifndef __FLAC_H__ +#define __FLAC_H__ + +#include +#include + +/*************************************************************************** + * TYPE DEFINITIONS + *************************************************************************** + */ + +typedef struct _flac_decoder flac_decoder; +struct _flac_decoder { + /* output state */ + FLAC__StreamDecoder* decoder; /* actual encoder */ + uint32_t sample_rate; /* decoded sample rate */ + uint8_t channels; /* decoded number of channels */ + uint8_t bits_per_sample; /* decoded bits per sample */ + uint32_t compressed_offset; /* current offset in compressed data */ + const FLAC__byte * compressed_start; /* start of compressed data */ + uint32_t compressed_length; /* length of compressed data */ + const FLAC__byte * compressed2_start; /* start of compressed data */ + uint32_t compressed2_length; /* length of compressed data */ + int16_t * uncompressed_start[8]; /* pointer to start of uncompressed data (up to 8 streams) */ + uint32_t uncompressed_offset; /* current position in uncompressed data */ + uint32_t uncompressed_length; /* length of uncompressed data */ + int uncompressed_swap; /* swap uncompressed sample data */ + uint8_t custom_header[0x2a]; /* custom header */ +}; + +/* ======================> flac_decoder */ + +void flac_decoder_init(flac_decoder* decoder); +void flac_decoder_free(flac_decoder* decoder); +int flac_decoder_reset(flac_decoder* decoder, uint32_t sample_rate, uint8_t num_channels, uint32_t block_size, const void *buffer, uint32_t length); +int flac_decoder_decode_interleaved(flac_decoder* decoder, int16_t *samples, uint32_t num_samples, int swap_endian); +uint32_t flac_decoder_finish(flac_decoder* decoder); + +#endif /* __FLAC_H__ */ diff --git a/deps/libchdr/huffman.c b/deps/libchdr/huffman.c index d67ec19..f48210e 100644 --- a/deps/libchdr/huffman.c +++ b/deps/libchdr/huffman.c @@ -1,528 +1,514 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - huffman.c - - Static Huffman compression and decompression helpers. - -**************************************************************************** - - Maximum codelength is officially (alphabetsize - 1). This would be 255 bits - (since we use 1 byte values). However, it is also dependent upon the number - of samples used, as follows: - - 2 bits -> 3..4 samples - 3 bits -> 5..7 samples - 4 bits -> 8..12 samples - 5 bits -> 13..20 samples - 6 bits -> 21..33 samples - 7 bits -> 34..54 samples - 8 bits -> 55..88 samples - 9 bits -> 89..143 samples - 10 bits -> 144..232 samples - 11 bits -> 233..376 samples - 12 bits -> 377..609 samples - 13 bits -> 610..986 samples - 14 bits -> 987..1596 samples - 15 bits -> 1597..2583 samples - 16 bits -> 2584..4180 samples -> note that a 4k data size guarantees codelength <= 16 bits - 17 bits -> 4181..6764 samples - 18 bits -> 6765..10945 samples - 19 bits -> 10946..17710 samples - 20 bits -> 17711..28656 samples - 21 bits -> 28657..46367 samples - 22 bits -> 46368..75024 samples - 23 bits -> 75025..121392 samples - 24 bits -> 121393..196417 samples - 25 bits -> 196418..317810 samples - 26 bits -> 317811..514228 samples - 27 bits -> 514229..832039 samples - 28 bits -> 832040..1346268 samples - 29 bits -> 1346269..2178308 samples - 30 bits -> 2178309..3524577 samples - 31 bits -> 3524578..5702886 samples - 32 bits -> 5702887..9227464 samples - - Looking at it differently, here is where powers of 2 fall into these buckets: - - 256 samples -> 11 bits max - 512 samples -> 12 bits max - 1k samples -> 14 bits max - 2k samples -> 15 bits max - 4k samples -> 16 bits max - 8k samples -> 18 bits max - 16k samples -> 19 bits max - 32k samples -> 21 bits max - 64k samples -> 22 bits max - 128k samples -> 24 bits max - 256k samples -> 25 bits max - 512k samples -> 27 bits max - 1M samples -> 28 bits max - 2M samples -> 29 bits max - 4M samples -> 31 bits max - 8M samples -> 32 bits max - -**************************************************************************** - - Delta-RLE encoding works as follows: - - Starting value is assumed to be 0. All data is encoded as a delta - from the previous value, such that final[i] = final[i - 1] + delta. - Long runs of 0s are RLE-encoded as follows: - - 0x100 = repeat count of 8 - 0x101 = repeat count of 9 - 0x102 = repeat count of 10 - 0x103 = repeat count of 11 - 0x104 = repeat count of 12 - 0x105 = repeat count of 13 - 0x106 = repeat count of 14 - 0x107 = repeat count of 15 - 0x108 = repeat count of 16 - 0x109 = repeat count of 32 - 0x10a = repeat count of 64 - 0x10b = repeat count of 128 - 0x10c = repeat count of 256 - 0x10d = repeat count of 512 - 0x10e = repeat count of 1024 - 0x10f = repeat count of 2048 - - Note that repeat counts are reset at the end of a row, so if a 0 run - extends to the end of a row, a large repeat count may be used. - - The reason for starting the run counts at 8 is that 0 is expected to - be the most common symbol, and is typically encoded in 1 or 2 bits. - -***************************************************************************/ - -#include -#include -#include -#include - -#include "huffman.h" - -#define MAX(x,y) ((x) > (y) ? (x) : (y)) - -//************************************************************************** -// MACROS -//************************************************************************** - -#define MAKE_LOOKUP(code,bits) (((code) << 5) | ((bits) & 0x1f)) - - -//************************************************************************** -// IMPLEMENTATION -//************************************************************************** - -//------------------------------------------------- -// huffman_context_base - create an encoding/ -// decoding context -//------------------------------------------------- - -struct huffman_decoder* create_huffman_decoder(int numcodes, int maxbits) -{ - struct huffman_decoder* decoder; - - /* limit to 24 bits */ - if (maxbits > 24) - return NULL; - - decoder = (struct huffman_decoder*)malloc(sizeof(struct huffman_decoder)); - decoder->numcodes = numcodes; - decoder->maxbits = maxbits; - decoder->lookup = (lookup_value*)malloc(sizeof(lookup_value) * (1 << maxbits)); - decoder->huffnode = (struct node_t*)malloc(sizeof(struct node_t) * numcodes); - decoder->datahisto = NULL; - decoder->prevdata = 0; - decoder->rleremaining = 0; - return decoder; -} - -//------------------------------------------------- -// decode_one - decode a single code from the -// huffman stream -//------------------------------------------------- - -uint32_t huffman_decode_one(struct huffman_decoder* decoder, struct bitstream* bitbuf) -{ - /* peek ahead to get maxbits worth of data */ - uint32_t bits = bitstream_peek(bitbuf, decoder->maxbits); - - /* look it up, then remove the actual number of bits for this code */ - lookup_value lookup = decoder->lookup[bits]; - bitstream_remove(bitbuf, lookup & 0x1f); - - /* return the value */ - return lookup >> 5; -} - -//------------------------------------------------- -// import_tree_rle - import an RLE-encoded -// huffman tree from a source data stream -//------------------------------------------------- - -enum huffman_error huffman_import_tree_rle(struct huffman_decoder* decoder, struct bitstream* bitbuf) -{ - enum huffman_error error; - int curnode; - // bits per entry depends on the maxbits - int numbits; - if (decoder->maxbits >= 16) - numbits = 5; - else if (decoder->maxbits >= 8) - numbits = 4; - else - numbits = 3; - - // loop until we read all the nodes - for (curnode = 0; curnode < decoder->numcodes; ) - { - // a non-one value is just raw - int nodebits = bitstream_read(bitbuf, numbits); - if (nodebits != 1) - decoder->huffnode[curnode++].numbits = nodebits; - - // a one value is an escape code - else - { - // a double 1 is just a single 1 - nodebits = bitstream_read(bitbuf, numbits); - if (nodebits == 1) - decoder->huffnode[curnode++].numbits = nodebits; - - // otherwise, we need one for value for the repeat count - else - { - int repcount = bitstream_read(bitbuf, numbits) + 3; - while (repcount--) - decoder->huffnode[curnode++].numbits = nodebits; - } - } - } - - // make sure we ended up with the right number - if (curnode != decoder->numcodes) - return HUFFERR_INVALID_DATA; - - // assign canonical codes for all nodes based on their code lengths - error = huffman_assign_canonical_codes(decoder); - if (error != HUFFERR_NONE) - return error; - - // build the lookup table - huffman_build_lookup_table(decoder); - - // determine final input length and report errors - return bitstream_overflow(bitbuf) ? HUFFERR_INPUT_BUFFER_TOO_SMALL : HUFFERR_NONE; -} - - -//------------------------------------------------- -// import_tree_huffman - import a huffman-encoded -// huffman tree from a source data stream -//------------------------------------------------- - -enum huffman_error huffman_import_tree_huffman(struct huffman_decoder* decoder, struct bitstream* bitbuf) -{ - int index; - int start; - int count = 0; - uint8_t rlefullbits = 0; - int last = 0; - int curcode; - enum huffman_error error; - uint32_t temp; - // start by parsing the lengths for the small tree - struct huffman_decoder* smallhuff = create_huffman_decoder(24, 6); - - smallhuff->huffnode[0].numbits = bitstream_read(bitbuf, 3); - start = bitstream_read(bitbuf, 3) + 1; - - for (index = 1; index < 24; index++) - { - if (index < start || count == 7) - smallhuff->huffnode[index].numbits = 0; - else - { - count = bitstream_read(bitbuf, 3); - smallhuff->huffnode[index].numbits = (count == 7) ? 0 : count; - } - } - - // then regenerate the tree - error = huffman_assign_canonical_codes(smallhuff); - if (error != HUFFERR_NONE) - return error; - huffman_build_lookup_table(smallhuff); - - // determine the maximum length of an RLE count - temp = decoder->numcodes - 9; - while (temp != 0) - temp >>= 1, rlefullbits++; - - // now process the rest of the data - for (curcode = 0; curcode < decoder->numcodes; ) - { - int value = huffman_decode_one(smallhuff, bitbuf); - if (value != 0) - decoder->huffnode[curcode++].numbits = last = value - 1; - else - { - int count = bitstream_read(bitbuf, 3) + 2; - if (count == 7+2) - count += bitstream_read(bitbuf, rlefullbits); - for ( ; count != 0 && curcode < decoder->numcodes; count--) - decoder->huffnode[curcode++].numbits = last; - } - } - - // make sure we ended up with the right number - if (curcode != decoder->numcodes) - return HUFFERR_INVALID_DATA; - - // assign canonical codes for all nodes based on their code lengths - error = huffman_assign_canonical_codes(decoder); - if (error != HUFFERR_NONE) - return error; - - // build the lookup table - huffman_build_lookup_table(decoder); - - // determine final input length and report errors - return bitstream_overflow(bitbuf) ? HUFFERR_INPUT_BUFFER_TOO_SMALL : HUFFERR_NONE; -} - - -//------------------------------------------------- -// compute_tree_from_histo - common backend for -// computing a tree based on the data histogram -//------------------------------------------------- - -enum huffman_error huffman_compute_tree_from_histo(struct huffman_decoder* decoder) -{ - int i; - uint32_t upperweight; - uint32_t lowerweight = 0; - // compute the number of data items in the histogram - uint32_t sdatacount = 0; - for (i = 0; i < decoder->numcodes; i++) - sdatacount += decoder->datahisto[i]; - - // binary search to achieve the optimum encoding - upperweight = sdatacount * 2; - while (1) - { - // build a tree using the current weight - uint32_t curweight = (upperweight + lowerweight) / 2; - int curmaxbits = huffman_build_tree(decoder, sdatacount, curweight); - - // apply binary search here - if (curmaxbits <= decoder->maxbits) - { - lowerweight = curweight; - - // early out if it worked with the raw weights, or if we're done searching - if (curweight == sdatacount || (upperweight - lowerweight) <= 1) - break; - } - else - upperweight = curweight; - } - - // assign canonical codes for all nodes based on their code lengths - return huffman_assign_canonical_codes(decoder); -} - - - -//************************************************************************** -// INTERNAL FUNCTIONS -//************************************************************************** - -//------------------------------------------------- -// tree_node_compare - compare two tree nodes -// by weight -//------------------------------------------------- - -static int huffman_tree_node_compare(const void *item1, const void *item2) -{ - const struct node_t *node1 = *(const struct node_t **)item1; - const struct node_t *node2 = *(const struct node_t **)item2; - if (node2->weight != node1->weight) - return node2->weight - node1->weight; - if (node2->bits - node1->bits == 0) - fprintf(stderr, "identical node sort keys, should not happen!\n"); - return (int)node1->bits - (int)node2->bits; -} - - -//------------------------------------------------- -// build_tree - build a huffman tree based on the -// data distribution -//------------------------------------------------- - -int huffman_build_tree(struct huffman_decoder* decoder, uint32_t totaldata, uint32_t totalweight) -{ - int curcode; - int nextalloc; - int maxbits = 0; - // make a list of all non-zero nodes - struct node_t** list = (struct node_t**)malloc(sizeof(struct node_t*) * decoder->numcodes * 2); - int listitems = 0; - memset(decoder->huffnode, 0, decoder->numcodes * sizeof(decoder->huffnode[0])); - for (curcode = 0; curcode < decoder->numcodes; curcode++) - if (decoder->datahisto[curcode] != 0) - { - list[listitems++] = &decoder->huffnode[curcode]; - decoder->huffnode[curcode].count = decoder->datahisto[curcode]; - decoder->huffnode[curcode].bits = curcode; - - // scale the weight by the current effective length, ensuring we don't go to 0 - decoder->huffnode[curcode].weight = ((uint64_t)decoder->datahisto[curcode]) * ((uint64_t)totalweight) / ((uint64_t)totaldata); - if (decoder->huffnode[curcode].weight == 0) - decoder->huffnode[curcode].weight = 1; - } -/* - fprintf(stderr, "Pre-sort:\n"); - for (int i = 0; i < listitems; i++) { - fprintf(stderr, "weight: %d code: %d\n", list[i]->m_weight, list[i]->m_bits); - } -*/ - // sort the list by weight, largest weight first - qsort(&list[0], listitems, sizeof(list[0]), huffman_tree_node_compare); -/* - fprintf(stderr, "Post-sort:\n"); - for (int i = 0; i < listitems; i++) { - fprintf(stderr, "weight: %d code: %d\n", list[i]->m_weight, list[i]->m_bits); - } - fprintf(stderr, "===================\n"); -*/ - // now build the tree - nextalloc = decoder->numcodes; - - while (listitems > 1) - { - int curitem; - // remove lowest two items - struct node_t* node1 = &(*list[--listitems]); - struct node_t* node0 = &(*list[--listitems]); - - // create new node - struct node_t* newnode = &decoder->huffnode[nextalloc++]; - newnode->parent = NULL; - node0->parent = node1->parent = newnode; - newnode->weight = node0->weight + node1->weight; - - // insert into list at appropriate location - for (curitem = 0; curitem < listitems; curitem++) - if (newnode->weight > list[curitem]->weight) - { - memmove(&list[curitem+1], &list[curitem], (listitems - curitem) * sizeof(list[0])); - break; - } - list[curitem] = newnode; - listitems++; - } - - // compute the number of bits in each code, and fill in another histogram - for (curcode = 0; curcode < decoder->numcodes; curcode++) - { - struct node_t* node = &decoder->huffnode[curcode]; - node->numbits = 0; - node->bits = 0; - - // if we have a non-zero weight, compute the number of bits - if (node->weight > 0) - { - struct node_t *curnode; - // determine the number of bits for this node - for (curnode = node; curnode->parent != NULL; curnode = curnode->parent) - node->numbits++; - if (node->numbits == 0) - node->numbits = 1; - - // keep track of the max - maxbits = MAX(maxbits, ((int)node->numbits)); - } - } - return maxbits; -} - - -//------------------------------------------------- -// assign_canonical_codes - assign canonical codes -// to all the nodes based on the number of bits -// in each -//------------------------------------------------- - -enum huffman_error huffman_assign_canonical_codes(struct huffman_decoder* decoder) -{ - int curcode, codelen; - uint32_t curstart = 0; - - // build up a histogram of bit lengths - uint32_t bithisto[33] = { 0 }; - for (curcode = 0; curcode < decoder->numcodes; curcode++) - { - struct node_t* node = &decoder->huffnode[curcode]; - if (node->numbits > decoder->maxbits) - return HUFFERR_INTERNAL_INCONSISTENCY; - if (node->numbits <= 32) - bithisto[node->numbits]++; - } - - // for each code length, determine the starting code number - for (codelen = 32; codelen > 0; codelen--) - { - uint32_t nextstart = (curstart + bithisto[codelen]) >> 1; - if (codelen != 1 && nextstart * 2 != (curstart + bithisto[codelen])) - return HUFFERR_INTERNAL_INCONSISTENCY; - bithisto[codelen] = curstart; - curstart = nextstart; - } - - // now assign canonical codes - for (curcode = 0; curcode < decoder->numcodes; curcode++) - { - struct node_t* node = &decoder->huffnode[curcode]; - if (node->numbits > 0) - node->bits = bithisto[node->numbits]++; - } - return HUFFERR_NONE; -} - - -//------------------------------------------------- -// build_lookup_table - build a lookup table for -// fast decoding -//------------------------------------------------- - -void huffman_build_lookup_table(struct huffman_decoder* decoder) -{ - int curcode; - // iterate over all codes - for (curcode = 0; curcode < decoder->numcodes; curcode++) - { - // process all nodes which have non-zero bits - struct node_t* node = &decoder->huffnode[curcode]; - if (node->numbits > 0) - { - int shift; - lookup_value *dest; - lookup_value *destend; - - // set up the entry - lookup_value value = MAKE_LOOKUP(curcode, node->numbits); - - // fill all matching entries - shift = decoder->maxbits - node->numbits; - dest = &decoder->lookup[node->bits << shift]; - destend = &decoder->lookup[((node->bits + 1) << shift) - 1]; - - while (dest <= destend) - *dest++ = value; - } - } -} +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +**************************************************************************** + + huffman.c + + Static Huffman compression and decompression helpers. + +**************************************************************************** + + Maximum codelength is officially (alphabetsize - 1). This would be 255 bits + (since we use 1 byte values). However, it is also dependent upon the number + of samples used, as follows: + + 2 bits -> 3..4 samples + 3 bits -> 5..7 samples + 4 bits -> 8..12 samples + 5 bits -> 13..20 samples + 6 bits -> 21..33 samples + 7 bits -> 34..54 samples + 8 bits -> 55..88 samples + 9 bits -> 89..143 samples + 10 bits -> 144..232 samples + 11 bits -> 233..376 samples + 12 bits -> 377..609 samples + 13 bits -> 610..986 samples + 14 bits -> 987..1596 samples + 15 bits -> 1597..2583 samples + 16 bits -> 2584..4180 samples -> note that a 4k data size guarantees codelength <= 16 bits + 17 bits -> 4181..6764 samples + 18 bits -> 6765..10945 samples + 19 bits -> 10946..17710 samples + 20 bits -> 17711..28656 samples + 21 bits -> 28657..46367 samples + 22 bits -> 46368..75024 samples + 23 bits -> 75025..121392 samples + 24 bits -> 121393..196417 samples + 25 bits -> 196418..317810 samples + 26 bits -> 317811..514228 samples + 27 bits -> 514229..832039 samples + 28 bits -> 832040..1346268 samples + 29 bits -> 1346269..2178308 samples + 30 bits -> 2178309..3524577 samples + 31 bits -> 3524578..5702886 samples + 32 bits -> 5702887..9227464 samples + + Looking at it differently, here is where powers of 2 fall into these buckets: + + 256 samples -> 11 bits max + 512 samples -> 12 bits max + 1k samples -> 14 bits max + 2k samples -> 15 bits max + 4k samples -> 16 bits max + 8k samples -> 18 bits max + 16k samples -> 19 bits max + 32k samples -> 21 bits max + 64k samples -> 22 bits max + 128k samples -> 24 bits max + 256k samples -> 25 bits max + 512k samples -> 27 bits max + 1M samples -> 28 bits max + 2M samples -> 29 bits max + 4M samples -> 31 bits max + 8M samples -> 32 bits max + +**************************************************************************** + + Delta-RLE encoding works as follows: + + Starting value is assumed to be 0. All data is encoded as a delta + from the previous value, such that final[i] = final[i - 1] + delta. + Long runs of 0s are RLE-encoded as follows: + + 0x100 = repeat count of 8 + 0x101 = repeat count of 9 + 0x102 = repeat count of 10 + 0x103 = repeat count of 11 + 0x104 = repeat count of 12 + 0x105 = repeat count of 13 + 0x106 = repeat count of 14 + 0x107 = repeat count of 15 + 0x108 = repeat count of 16 + 0x109 = repeat count of 32 + 0x10a = repeat count of 64 + 0x10b = repeat count of 128 + 0x10c = repeat count of 256 + 0x10d = repeat count of 512 + 0x10e = repeat count of 1024 + 0x10f = repeat count of 2048 + + Note that repeat counts are reset at the end of a row, so if a 0 run + extends to the end of a row, a large repeat count may be used. + + The reason for starting the run counts at 8 is that 0 is expected to + be the most common symbol, and is typically encoded in 1 or 2 bits. + +***************************************************************************/ + +#include +#include +#include +#include + +#include "huffman.h" + +#define MAX(x,y) ((x) > (y) ? (x) : (y)) + +/*************************************************************************** + * MACROS + *************************************************************************** + */ + +#define MAKE_LOOKUP(code,bits) (((code) << 5) | ((bits) & 0x1f)) + +/*************************************************************************** + * IMPLEMENTATION + *************************************************************************** + */ + +/*------------------------------------------------- + * huffman_context_base - create an encoding/ + * decoding context + *------------------------------------------------- + */ + +struct huffman_decoder* create_huffman_decoder(int numcodes, int maxbits) +{ + /* limit to 24 bits */ + if (maxbits > 24) + return NULL; + + struct huffman_decoder* decoder = (struct huffman_decoder*)malloc(sizeof(struct huffman_decoder)); + decoder->numcodes = numcodes; + decoder->maxbits = maxbits; + decoder->lookup = (lookup_value*)malloc(sizeof(lookup_value) * (1 << maxbits)); + decoder->huffnode = (struct node_t*)malloc(sizeof(struct node_t) * numcodes); + decoder->datahisto = NULL; + decoder->prevdata = 0; + decoder->rleremaining = 0; + return decoder; +} + +/*------------------------------------------------- + * decode_one - decode a single code from the + * huffman stream + *------------------------------------------------- + */ + +uint32_t huffman_decode_one(struct huffman_decoder* decoder, struct bitstream* bitbuf) +{ + /* peek ahead to get maxbits worth of data */ + uint32_t bits = bitstream_peek(bitbuf, decoder->maxbits); + + /* look it up, then remove the actual number of bits for this code */ + lookup_value lookup = decoder->lookup[bits]; + bitstream_remove(bitbuf, lookup & 0x1f); + + /* return the value */ + return lookup >> 5; +} + +/*------------------------------------------------- + * import_tree_rle - import an RLE-encoded + * huffman tree from a source data stream + *------------------------------------------------- + */ + +enum huffman_error huffman_import_tree_rle(struct huffman_decoder* decoder, struct bitstream* bitbuf) +{ + /* bits per entry depends on the maxbits */ + int numbits; + if (decoder->maxbits >= 16) + numbits = 5; + else if (decoder->maxbits >= 8) + numbits = 4; + else + numbits = 3; + + /* loop until we read all the nodes */ + int curnode; + for (curnode = 0; curnode < decoder->numcodes; ) + { + /* a non-one value is just raw */ + int nodebits = bitstream_read(bitbuf, numbits); + if (nodebits != 1) + decoder->huffnode[curnode++].numbits = nodebits; + + /* a one value is an escape code */ + else + { + /* a double 1 is just a single 1 */ + nodebits = bitstream_read(bitbuf, numbits); + if (nodebits == 1) + decoder->huffnode[curnode++].numbits = nodebits; + + /* otherwise, we need one for value for the repeat count */ + else + { + int repcount = bitstream_read(bitbuf, numbits) + 3; + while (repcount--) + decoder->huffnode[curnode++].numbits = nodebits; + } + } + } + + /* make sure we ended up with the right number */ + if (curnode != decoder->numcodes) + return HUFFERR_INVALID_DATA; + + /* assign canonical codes for all nodes based on their code lengths */ + enum huffman_error error = huffman_assign_canonical_codes(decoder); + if (error != HUFFERR_NONE) + return error; + + /* build the lookup table */ + huffman_build_lookup_table(decoder); + + /* determine final input length and report errors */ + return bitstream_overflow(bitbuf) ? HUFFERR_INPUT_BUFFER_TOO_SMALL : HUFFERR_NONE; +} + + +/*------------------------------------------------- + * import_tree_huffman - import a huffman-encoded + * huffman tree from a source data stream + *------------------------------------------------- + */ + +enum huffman_error huffman_import_tree_huffman(struct huffman_decoder* decoder, struct bitstream* bitbuf) +{ + /* start by parsing the lengths for the small tree */ + struct huffman_decoder* smallhuff = create_huffman_decoder(24, 6); + smallhuff->huffnode[0].numbits = bitstream_read(bitbuf, 3); + int start = bitstream_read(bitbuf, 3) + 1; + int count = 0; + for (int index = 1; index < 24; index++) + { + if (index < start || count == 7) + smallhuff->huffnode[index].numbits = 0; + else + { + count = bitstream_read(bitbuf, 3); + smallhuff->huffnode[index].numbits = (count == 7) ? 0 : count; + } + } + + /* then regenerate the tree */ + enum huffman_error error = huffman_assign_canonical_codes(smallhuff); + if (error != HUFFERR_NONE) + return error; + huffman_build_lookup_table(smallhuff); + + /* determine the maximum length of an RLE count */ + uint32_t temp = decoder->numcodes - 9; + uint8_t rlefullbits = 0; + while (temp != 0) + temp >>= 1, rlefullbits++; + + /* now process the rest of the data */ + int last = 0; + int curcode; + for (curcode = 0; curcode < decoder->numcodes; ) + { + int value = huffman_decode_one(smallhuff, bitbuf); + if (value != 0) + decoder->huffnode[curcode++].numbits = last = value - 1; + else + { + int count = bitstream_read(bitbuf, 3) + 2; + if (count == 7+2) + count += bitstream_read(bitbuf, rlefullbits); + for ( ; count != 0 && curcode < decoder->numcodes; count--) + decoder->huffnode[curcode++].numbits = last; + } + } + + /* make sure we ended up with the right number */ + if (curcode != decoder->numcodes) + return HUFFERR_INVALID_DATA; + + /* assign canonical codes for all nodes based on their code lengths */ + error = huffman_assign_canonical_codes(decoder); + if (error != HUFFERR_NONE) + return error; + + /* build the lookup table */ + huffman_build_lookup_table(decoder); + + /* determine final input length and report errors */ + return bitstream_overflow(bitbuf) ? HUFFERR_INPUT_BUFFER_TOO_SMALL : HUFFERR_NONE; +} + +/*------------------------------------------------- + * compute_tree_from_histo - common backend for + * computing a tree based on the data histogram + *------------------------------------------------- + */ + +enum huffman_error huffman_compute_tree_from_histo(struct huffman_decoder* decoder) +{ + /* compute the number of data items in the histogram */ + uint32_t sdatacount = 0; + for (int i = 0; i < decoder->numcodes; i++) + sdatacount += decoder->datahisto[i]; + + /* binary search to achieve the optimum encoding */ + uint32_t lowerweight = 0; + uint32_t upperweight = sdatacount * 2; + while (1) + { + /* build a tree using the current weight */ + uint32_t curweight = (upperweight + lowerweight) / 2; + int curmaxbits = huffman_build_tree(decoder, sdatacount, curweight); + + /* apply binary search here */ + if (curmaxbits <= decoder->maxbits) + { + lowerweight = curweight; + + /* early out if it worked with the raw weights, or if we're done searching */ + if (curweight == sdatacount || (upperweight - lowerweight) <= 1) + break; + } + else + upperweight = curweight; + } + + /* assign canonical codes for all nodes based on their code lengths */ + return huffman_assign_canonical_codes(decoder); +} + +/*************************************************************************** + * INTERNAL FUNCTIONS + *************************************************************************** + */ + +/*------------------------------------------------- + * tree_node_compare - compare two tree nodes + * by weight + *------------------------------------------------- + */ + +static int huffman_tree_node_compare(const void *item1, const void *item2) +{ + const struct node_t *node1 = *(const struct node_t **)item1; + const struct node_t *node2 = *(const struct node_t **)item2; + if (node2->weight != node1->weight) + return node2->weight - node1->weight; + if (node2->bits - node1->bits == 0) + fprintf(stderr, "identical node sort keys, should not happen!\n"); + return (int)node1->bits - (int)node2->bits; +} + +/*------------------------------------------------- + * build_tree - build a huffman tree based on the + * data distribution + *------------------------------------------------- + */ + +int huffman_build_tree(struct huffman_decoder* decoder, uint32_t totaldata, uint32_t totalweight) +{ + /* make a list of all non-zero nodes */ + struct node_t** list = (struct node_t**)malloc(sizeof(struct node_t*) * decoder->numcodes * 2); + int listitems = 0; + memset(decoder->huffnode, 0, decoder->numcodes * sizeof(decoder->huffnode[0])); + for (int curcode = 0; curcode < decoder->numcodes; curcode++) + if (decoder->datahisto[curcode] != 0) + { + list[listitems++] = &decoder->huffnode[curcode]; + decoder->huffnode[curcode].count = decoder->datahisto[curcode]; + decoder->huffnode[curcode].bits = curcode; + + /* scale the weight by the current effective length, ensuring we don't go to 0 */ + decoder->huffnode[curcode].weight = ((uint64_t)decoder->datahisto[curcode]) * ((uint64_t)totalweight) / ((uint64_t)totaldata); + if (decoder->huffnode[curcode].weight == 0) + decoder->huffnode[curcode].weight = 1; + } + +#if 0 + fprintf(stderr, "Pre-sort:\n"); + for (int i = 0; i < listitems; i++) { + fprintf(stderr, "weight: %d code: %d\n", list[i]->m_weight, list[i]->m_bits); + } +#endif + + /* sort the list by weight, largest weight first */ + qsort(&list[0], listitems, sizeof(list[0]), huffman_tree_node_compare); + +#if 0 + fprintf(stderr, "Post-sort:\n"); + for (int i = 0; i < listitems; i++) { + fprintf(stderr, "weight: %d code: %d\n", list[i]->m_weight, list[i]->m_bits); + } + fprintf(stderr, "===================\n"); +#endif + + /* now build the tree */ + int nextalloc = decoder->numcodes; + while (listitems > 1) + { + /* remove lowest two items */ + struct node_t* node1 = &(*list[--listitems]); + struct node_t* node0 = &(*list[--listitems]); + + /* create new node */ + struct node_t* newnode = &decoder->huffnode[nextalloc++]; + newnode->parent = NULL; + node0->parent = node1->parent = newnode; + newnode->weight = node0->weight + node1->weight; + + /* insert into list at appropriate location */ + int curitem; + for (curitem = 0; curitem < listitems; curitem++) + if (newnode->weight > list[curitem]->weight) + { + memmove(&list[curitem+1], &list[curitem], (listitems - curitem) * sizeof(list[0])); + break; + } + list[curitem] = newnode; + listitems++; + } + + /* compute the number of bits in each code, and fill in another histogram */ + int maxbits = 0; + for (int curcode = 0; curcode < decoder->numcodes; curcode++) + { + struct node_t* node = &decoder->huffnode[curcode]; + node->numbits = 0; + node->bits = 0; + + /* if we have a non-zero weight, compute the number of bits */ + if (node->weight > 0) + { + /* determine the number of bits for this node */ + for (struct node_t *curnode = node; curnode->parent != NULL; curnode = curnode->parent) + node->numbits++; + if (node->numbits == 0) + node->numbits = 1; + + /* keep track of the max */ + maxbits = MAX(maxbits, ((int)node->numbits)); + } + } + return maxbits; +} + +/*------------------------------------------------- + * assign_canonical_codes - assign canonical codes + * to all the nodes based on the number of bits + * in each + *------------------------------------------------- + */ + +enum huffman_error huffman_assign_canonical_codes(struct huffman_decoder* decoder) +{ + /* build up a histogram of bit lengths */ + uint32_t bithisto[33] = { 0 }; + for (int curcode = 0; curcode < decoder->numcodes; curcode++) + { + struct node_t* node = &decoder->huffnode[curcode]; + if (node->numbits > decoder->maxbits) + return HUFFERR_INTERNAL_INCONSISTENCY; + if (node->numbits <= 32) + bithisto[node->numbits]++; + } + + /* for each code length, determine the starting code number */ + uint32_t curstart = 0; + for (int codelen = 32; codelen > 0; codelen--) + { + uint32_t nextstart = (curstart + bithisto[codelen]) >> 1; + if (codelen != 1 && nextstart * 2 != (curstart + bithisto[codelen])) + return HUFFERR_INTERNAL_INCONSISTENCY; + bithisto[codelen] = curstart; + curstart = nextstart; + } + + /* now assign canonical codes */ + for (int curcode = 0; curcode < decoder->numcodes; curcode++) + { + struct node_t* node = &decoder->huffnode[curcode]; + if (node->numbits > 0) + node->bits = bithisto[node->numbits]++; + } + return HUFFERR_NONE; +} + +/*------------------------------------------------- + * build_lookup_table - build a lookup table for + * fast decoding + *------------------------------------------------- + */ + +void huffman_build_lookup_table(struct huffman_decoder* decoder) +{ + /* iterate over all codes */ + for (int curcode = 0; curcode < decoder->numcodes; curcode++) + { + /* process all nodes which have non-zero bits */ + struct node_t* node = &decoder->huffnode[curcode]; + if (node->numbits > 0) + { + /* set up the entry */ + lookup_value value = MAKE_LOOKUP(curcode, node->numbits); + + /* fill all matching entries */ + int shift = decoder->maxbits - node->numbits; + lookup_value *dest = &decoder->lookup[node->bits << shift]; + lookup_value *destend = &decoder->lookup[((node->bits + 1) << shift) - 1]; + while (dest <= destend) + *dest++ = value; + } + } +} diff --git a/deps/libchdr/huffman.h b/deps/libchdr/huffman.h index 71de399..8bcc45a 100644 --- a/deps/libchdr/huffman.h +++ b/deps/libchdr/huffman.h @@ -1,87 +1,89 @@ -// license:BSD-3-Clause -// copyright-holders:Aaron Giles -/*************************************************************************** - - huffman.h - - Static Huffman compression and decompression helpers. - -***************************************************************************/ - -#pragma once - -#ifndef __HUFFMAN_H__ -#define __HUFFMAN_H__ - -#include "bitstream.h" - - -//************************************************************************** -// CONSTANTS -//************************************************************************** - -enum huffman_error -{ - HUFFERR_NONE = 0, - HUFFERR_TOO_MANY_BITS, - HUFFERR_INVALID_DATA, - HUFFERR_INPUT_BUFFER_TOO_SMALL, - HUFFERR_OUTPUT_BUFFER_TOO_SMALL, - HUFFERR_INTERNAL_INCONSISTENCY, - HUFFERR_TOO_MANY_CONTEXTS -}; - - - -//************************************************************************** -// TYPE DEFINITIONS -//************************************************************************** - -typedef uint16_t lookup_value; - -// a node in the huffman tree -struct node_t -{ - struct node_t* parent; // pointer to parent node - uint32_t count; // number of hits on this node - uint32_t weight; // assigned weight of this node - uint32_t bits; // bits used to encode the node - uint8_t numbits; // number of bits needed for this node -}; - -// ======================> huffman_context_base - -// context class for decoding -struct huffman_decoder -{ - // internal state - uint32_t numcodes; // number of total codes being processed - uint8_t maxbits; // maximum bits per code - uint8_t prevdata; // value of the previous data (for delta-RLE encoding) - int rleremaining; // number of RLE bytes remaining (for delta-RLE encoding) - lookup_value * lookup; // pointer to the lookup table - struct node_t * huffnode; // array of nodes - uint32_t * datahisto; // histogram of data values - - // array versions of the info we need - //node_t* huffnode_array; //[_NumCodes]; - //lookup_value* lookup_array; //[1 << _MaxBits]; -}; - -// ======================> huffman_decoder - -struct huffman_decoder* create_huffman_decoder(int numcodes, int maxbits); - -// single item operations -uint32_t huffman_decode_one(struct huffman_decoder* decoder, struct bitstream* bitbuf); - -enum huffman_error huffman_import_tree_rle(struct huffman_decoder* decoder, struct bitstream* bitbuf); -enum huffman_error huffman_import_tree_huffman(struct huffman_decoder* decoder, struct bitstream* bitbuf); - -int huffman_build_tree(struct huffman_decoder* decoder, uint32_t totaldata, uint32_t totalweight); -enum huffman_error huffman_assign_canonical_codes(struct huffman_decoder* decoder); -enum huffman_error huffman_compute_tree_from_histo(struct huffman_decoder* decoder); - -void huffman_build_lookup_table(struct huffman_decoder* decoder); - -#endif +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles + *************************************************************************** + + huffman.h + + Static Huffman compression and decompression helpers. + +***************************************************************************/ + +#pragma once + +#ifndef __HUFFMAN_H__ +#define __HUFFMAN_H__ + +#include "bitstream.h" + + +/*************************************************************************** + * CONSTANTS + *************************************************************************** + */ + +enum huffman_error +{ + HUFFERR_NONE = 0, + HUFFERR_TOO_MANY_BITS, + HUFFERR_INVALID_DATA, + HUFFERR_INPUT_BUFFER_TOO_SMALL, + HUFFERR_OUTPUT_BUFFER_TOO_SMALL, + HUFFERR_INTERNAL_INCONSISTENCY, + HUFFERR_TOO_MANY_CONTEXTS +}; + +/*************************************************************************** + * TYPE DEFINITIONS + *************************************************************************** + */ + +typedef uint16_t lookup_value; + +/* a node in the huffman tree */ +struct node_t +{ + struct node_t* parent; /* pointer to parent node */ + uint32_t count; /* number of hits on this node */ + uint32_t weight; /* assigned weight of this node */ + uint32_t bits; /* bits used to encode the node */ + uint8_t numbits; /* number of bits needed for this node */ +}; + +/* ======================> huffman_context_base */ + +/* context class for decoding */ +struct huffman_decoder +{ + /* internal state */ + uint32_t numcodes; /* number of total codes being processed */ + uint8_t maxbits; /* maximum bits per code */ + uint8_t prevdata; /* value of the previous data (for delta-RLE encoding) */ + int rleremaining; /* number of RLE bytes remaining (for delta-RLE encoding) */ + lookup_value * lookup; /* pointer to the lookup table */ + struct node_t * huffnode; /* array of nodes */ + uint32_t * datahisto; /* histogram of data values */ + + /* array versions of the info we need */ +#if 0 + node_t* huffnode_array; /* [_NumCodes]; */ + lookup_value* lookup_array; /* [1 << _MaxBits]; */ +#endif +}; + +/* ======================> huffman_decoder */ + +struct huffman_decoder* create_huffman_decoder(int numcodes, int maxbits); + +/* single item operations */ +uint32_t huffman_decode_one(struct huffman_decoder* decoder, struct bitstream* bitbuf); + +enum huffman_error huffman_import_tree_rle(struct huffman_decoder* decoder, struct bitstream* bitbuf); +enum huffman_error huffman_import_tree_huffman(struct huffman_decoder* decoder, struct bitstream* bitbuf); + +int huffman_build_tree(struct huffman_decoder* decoder, uint32_t totaldata, uint32_t totalweight); +enum huffman_error huffman_assign_canonical_codes(struct huffman_decoder* decoder); +enum huffman_error huffman_compute_tree_from_histo(struct huffman_decoder* decoder); + +void huffman_build_lookup_table(struct huffman_decoder* decoder); + +#endif -- cgit v1.2.3