/*********************************************************************************** Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com), Jerremy Koot (jkoot@snes9x.com) (c) Copyright 2002 - 2004 Matthew Kendora (c) Copyright 2002 - 2005 Peter Bortas (peter@bortas.org) (c) Copyright 2004 - 2005 Joel Yliluoma (http://iki.fi/bisqwit/) (c) Copyright 2001 - 2006 John Weidman (jweidman@slip.net) (c) Copyright 2002 - 2006 funkyass (funkyass@spam.shaw.ca), Kris Bleakley (codeviolation@hotmail.com) (c) Copyright 2002 - 2010 Brad Jorsch (anomie@users.sourceforge.net), Nach (n-a-c-h@users.sourceforge.net), zones (kasumitokoduck@yahoo.com) (c) Copyright 2006 - 2007 nitsuja (c) Copyright 2009 - 2010 BearOso, OV2 BS-X C emulator code (c) Copyright 2005 - 2006 Dreamer Nom, zones C4 x86 assembler and some C emulation code (c) Copyright 2000 - 2003 _Demo_ (_demo_@zsnes.com), Nach, zsKnight (zsknight@zsnes.com) C4 C++ code (c) Copyright 2003 - 2006 Brad Jorsch, Nach DSP-1 emulator code (c) Copyright 1998 - 2006 _Demo_, Andreas Naive (andreasnaive@gmail.com), Gary Henderson, Ivar (ivar@snes9x.com), John Weidman, Kris Bleakley, Matthew Kendora, Nach, neviksti (neviksti@hotmail.com) DSP-2 emulator code (c) Copyright 2003 John Weidman, Kris Bleakley, Lord Nightmare (lord_nightmare@users.sourceforge.net), Matthew Kendora, neviksti DSP-3 emulator code (c) Copyright 2003 - 2006 John Weidman, Kris Bleakley, Lancer, z80 gaiden DSP-4 emulator code (c) Copyright 2004 - 2006 Dreamer Nom, John Weidman, Kris Bleakley, Nach, z80 gaiden OBC1 emulator code (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com), Kris Bleakley Ported from x86 assembler to C by sanmaiwashi SPC7110 and RTC C++ emulator code used in 1.39-1.51 (c) Copyright 2002 Matthew Kendora with research by zsKnight, John Weidman, Dark Force SPC7110 and RTC C++ emulator code used in 1.52+ (c) Copyright 2009 byuu, neviksti S-DD1 C emulator code (c) Copyright 2003 Brad Jorsch with research by Andreas Naive, John Weidman S-RTC C emulator code (c) Copyright 2001 - 2006 byuu, John Weidman ST010 C++ emulator code (c) Copyright 2003 Feather, John Weidman, Kris Bleakley, Matthew Kendora Super FX x86 assembler emulator code (c) Copyright 1998 - 2003 _Demo_, pagefault, zsKnight Super FX C emulator code (c) Copyright 1997 - 1999 Ivar, Gary Henderson, John Weidman Sound emulator code used in 1.5-1.51 (c) Copyright 1998 - 2003 Brad Martin (c) Copyright 1998 - 2006 Charles Bilyue' Sound emulator code used in 1.52+ (c) Copyright 2004 - 2007 Shay Green (gblargg@gmail.com) SH assembler code partly based on x86 assembler code (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) 2xSaI filter (c) Copyright 1999 - 2001 Derek Liauw Kie Fa HQ2x, HQ3x, HQ4x filters (c) Copyright 2003 Maxim Stepin (maxim@hiend3d.com) NTSC filter (c) Copyright 2006 - 2007 Shay Green GTK+ GUI code (c) Copyright 2004 - 2010 BearOso Win32 GUI code (c) Copyright 2003 - 2006 blip, funkyass, Matthew Kendora, Nach, nitsuja (c) Copyright 2009 - 2010 OV2 Mac OS GUI code (c) Copyright 1998 - 2001 John Stiles (c) Copyright 2001 - 2010 zones Specific ports contains the works of other authors. See headers in individual files. Snes9x homepage: http://www.snes9x.com/ Permission to use, copy, modify and/or distribute Snes9x in both binary and source form, for non-commercial purposes, is hereby granted without fee, providing that this license information and copyright notice appear with all copies and any derived work. This software is provided 'as-is', without any express or implied warranty. In no event shall the authors be held liable for any damages arising from the use of this software or it's derivatives. Snes9x is freeware for PERSONAL USE only. Commercial users should seek permission of the copyright holders first. Commercial use includes, but is not limited to, charging money for Snes9x or software derived from Snes9x, including Snes9x or derivatives in commercial game bundles, and/or using Snes9x as a promotion for your commercial product. The copyright holders request that bug fixes and improvements to the code should be forwarded to them so everyone can benefit from the modifications in future versions. Super NES and Super Nintendo Entertainment System are trademarks of Nintendo Co., Limited and its subsidiary companies. ***********************************************************************************/ #ifdef USE_BLARGG_APU #ifndef APU_BLARGG_H #define APU_BLARGG_H #include "snes9x.h" typedef void (*dsp_copy_func_t)( unsigned char** io, void* state, size_t ); #define ECHO_HIST_SIZE 8 #define ECHO_HIST_SIZE_X2 16 /* Sound control */ /* Mutes voices corresponding to non-zero bits in mask (issues repeated KOFF events). Reduces emulation accuracy. */ #define VOICE_COUNT 8 #define EXTRA_SIZE 16 #define EXTRA_SIZE_DIV_2 8 #define BRR_BUF_SIZE 12 #define BRR_BUF_SIZE_X2 24 #define BRR_BLOCK_SIZE 9 /* DSP register addresses */ /* Global registers */ #define R_MVOLL 0x0C #define R_MVOLR 0x1C #define R_EVOLL 0x2C #define R_EVOLR 0x3C #define R_KON 0x4C #define R_KOFF 0x5C #define R_FLG 0x6C #define R_ENDX 0x7C #define R_EFB 0x0D #define R_EON 0x4D #define R_PMON 0x2D #define R_NON 0x3D #define R_DIR 0x5D #define R_ESA 0x6D #define R_EDL 0x7D #define R_FIR 0x0F /* 8 coefficients at 0x0F, 0x1F ... 0x7F */ /* Voice registers */ #define V_VOLL 0x00 #define V_VOLR 0x01 #define V_PITCHL 0x02 #define V_PITCHH 0x03 #define V_SRCN 0x04 #define V_ADSR0 0x05 #define V_ADSR1 0x06 #define V_GAIN 0x07 #define V_ENVX 0x08 #define V_OUTX 0x09 /* Status flag handling */ /* Hex value in name to clarify code and bit shifting. Flag stored in indicated variable during emulation */ #define N80 0x80 /* nz */ #define V40 0x40 /* psw */ #define P20 0x20 /* dp */ #define B10 0x10 /* psw */ #define H08 0x08 /* psw */ #define I04 0x04 /* psw */ #define Z02 0x02 /* nz */ #define C01 0x01 /* c */ #define NZ_NEG_MASK 0x880 /* either bit set indicates N flag set */ #define REGISTER_COUNT 128 #define ENV_RELEASE 0 #define ENV_ATTACK 1 #define ENV_DECAY 2 #define ENV_SUSTAIN 3 typedef struct { /* decoded samples (twice the size to simplify wrap handling) */ int buf [BRR_BUF_SIZE_X2]; /* place in buffer where next samples will be decoded */ int buf_pos; /* relative fractional position in sample (0x1000 = 1.0) */ int interp_pos; /* address of current BRR block */ int brr_addr; /* current decoding offset in BRR block */ int brr_offset; /* pointer to voice's DSP registers */ uint8_t* regs; /* bitmask for voice: 0x01 for voice 0, 0x02 for voice 1, etc. */ int vbit; /* KON delay/current setup phase */ int kon_delay; int env_mode; /* current envelope level */ int env; /* used by GAIN mode 7, very obscure quirk */ int hidden_env; uint8_t t_envx_out; } dsp_voice_t; typedef struct { uint8_t regs [REGISTER_COUNT]; /* Echo history keeps most recent 8 samples (twice the size to simplify wrap handling) */ int echo_hist [ECHO_HIST_SIZE_X2] [2]; int (*echo_hist_pos) [2]; /* &echo_hist [0 to 7] */ int every_other_sample; /* toggles every sample */ int kon; /* KON value when last checked */ int noise; int counter; int echo_offset; /* offset from ESA in echo buffer */ int echo_length; /* number of bytes that echo_offset will stop at */ int phase; /* next clock cycle to run (0-31) */ /* Hidden registers also written to when main register is written to */ int new_kon; uint8_t endx_buf; uint8_t envx_buf; uint8_t outx_buf; /* Temporary state between clocks */ /* read once per sample */ int t_pmon; int t_non; int t_eon; int t_dir; int t_koff; /* read a few clocks ahead then used */ int t_brr_next_addr; int t_adsr0; int t_brr_header; int t_brr_byte; int t_srcn; int t_esa; int t_echo_enabled; /* internal state that is recalculated every sample */ int t_dir_addr; int t_pitch; int t_output; int t_looped; int t_echo_ptr; /* left/right sums */ int t_main_out [2]; int t_echo_out [2]; int t_echo_in [2]; dsp_voice_t voices [VOICE_COUNT]; /* non-emulation state */ uint8_t* ram; /* 64K shared RAM between DSP and SMP */ short* out; short* out_end; short* out_begin; short extra [EXTRA_SIZE]; int rom_enabled; uint8_t *rom, *hi_ram; } dsp_state_t; #if !SPC_NO_COPY_STATE_FUNCS typedef struct { dsp_copy_func_t func; unsigned char** buf; } spc_state_copy_t; #define SPC_COPY( type, state ) state = (type) spc_copier_copy_int(&copier, state, sizeof (type) ); #endif #define REG_COUNT 0x10 #define PORT_COUNT 4 #define TEMPO_UNIT 0x100 #define STATE_SIZE 68 * 1024L /* maximum space needed when saving */ #define TIMER_COUNT 3 #define ROM_SIZE 0x40 #define ROM_ADDR 0xFFC0 /* 1024000 SPC clocks per second, sample pair every 32 clocks */ #define CLOCKS_PER_SAMPLE 32 #define R_TEST 0x0 #define R_CONTROL 0x1 #define R_DSPADDR 0x2 #define R_DSPDATA 0x3 #define R_CPUIO0 0x4 #define R_CPUIO1 0x5 #define R_CPUIO2 0x6 #define R_CPUIO3 0x7 #define R_F8 0x8 #define R_F9 0x9 #define R_T0TARGET 0xA #define R_T1TARGET 0xB #define R_T2TARGET 0xC #define R_T0OUT 0xD #define R_T1OUT 0xE #define R_T2OUT 0xF /* Value that padding should be filled with */ #define CPU_PAD_FILL 0xFF #if !SPC_NO_COPY_STATE_FUNCS /* Saves/loads state */ void spc_copy_state( unsigned char** io, dsp_copy_func_t ); #endif /* rel_time_t - Time relative to m_spc_time. Speeds up code a bit by eliminating need to constantly add m_spc_time to time from CPU. CPU uses time that ends at 0 to eliminate reloading end time every instruction. It pays off. */ typedef struct { int next_time; /* time of next event */ int prescaler; int period; int divider; int enabled; int counter; } Timer; /* Support SNES_MEMORY_APURAM */ uint8_t *spc_apuram (void); typedef struct { Timer timers [TIMER_COUNT]; uint8_t smp_regs [2] [REG_COUNT]; struct { int pc; int a; int x; int y; int psw; int sp; } cpu_regs; int dsp_time; int spc_time; int tempo; int extra_clocks; short* buf_begin; short* buf_end; short* extra_pos; short extra_buf [EXTRA_SIZE]; int rom_enabled; uint8_t rom [ROM_SIZE]; uint8_t hi_ram [ROM_SIZE]; unsigned char cycle_table [256]; struct { /* padding to neutralize address overflow */ union { uint8_t padding1 [0x100]; uint16_t align; /* makes compiler align data for 16-bit access */ } padding1 [1]; uint8_t ram [0x10000]; uint8_t padding2 [0x100]; } ram; } spc_state_t; /* Number of samples written to output since last set */ #define SPC_SAMPLE_COUNT() ((m.extra_clocks >> 5) * 2) typedef void (*apu_callback)(void); #define SPC_SAVE_STATE_BLOCK_SIZE (STATE_SIZE + 8) bool S9xInitAPU (void); void S9xDeinitAPU (void); void S9xResetAPU (void); void S9xSoftResetAPU (void); uint8_t S9xAPUReadPort (int port); void S9xAPUWritePort (int port, uint8_t byte); void S9xAPUExecute (void); void S9xAPUSetReferenceTime (int32_t cpucycles); void S9xAPUTimingSetSpeedup (int ticks); void S9xAPUAllowTimeOverflow (bool allow); void S9xAPULoadState (uint8_t * block); void S9xAPUSaveState (uint8_t * block); bool S9xInitSound (int buffer_ms, int lag_ms); bool S9xSyncSound (void); int S9xGetSampleCount (void); void S9xFinalizeSamples (void); void S9xClearSamples (void); bool S9xMixSamples (short * buffer, unsigned sample_count); void S9xSetSamplesAvailableCallback (apu_callback); #endif // APU_BLARGG_H #endif