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Diffstat (limited to 'engines/scumm/player/pce.cpp')
| -rw-r--r-- | engines/scumm/player/pce.cpp | 756 |
1 files changed, 0 insertions, 756 deletions
diff --git a/engines/scumm/player/pce.cpp b/engines/scumm/player/pce.cpp deleted file mode 100644 index 0a9cbaa315..0000000000 --- a/engines/scumm/player/pce.cpp +++ /dev/null @@ -1,756 +0,0 @@ -/* ScummVM - Graphic Adventure Engine - * - * ScummVM is the legal property of its developers, whose names - * are too numerous to list here. Please refer to the COPYRIGHT - * file distributed with this source distribution. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * - */ - -/* - * The PSG_HuC6280 class is based on the HuC6280 sound chip emulator - * by Charles MacDonald (E-mail: cgfm2@hotmail.com, WWW: http://cgfm2.emuviews.com) - * The implementation used here was taken from MESS (http://www.mess.org/) - * the Multiple Emulator Super System (sound/c6280.c). - * LFO and noise channel support have been removed (not used by Loom PCE). - */ - -#include <math.h> -#include "scumm/player/pce.h" -#include "common/endian.h" - -// PCE sound engine is only used by Loom, which requires 16bit color support -#ifdef USE_RGB_COLOR - -namespace Scumm { - -// CPU and PSG use the same base clock but with a different divider -const double MASTER_CLOCK = 21477270.0; // ~21.48 MHz -const double CPU_CLOCK = MASTER_CLOCK / 3; // ~7.16 MHz -const double PSG_CLOCK = MASTER_CLOCK / 6; // ~3.58 MHz -const double TIMER_CLOCK = CPU_CLOCK / 1024; // ~6.9 kHz - -// The PSG update routine is originally triggered by the timer IRQ (not by VSYNC) -// approx. 120 times per second (TIML=0x39). But as just every second call is used -// to update the PSG we will call the update routine approx. 60 times per second. -const double UPDATE_FREQ = TIMER_CLOCK / (57 + 1) / 2; // ~60 Hz - -// $AFA5 -static const byte wave_table[7][32] = { - { // sine - 0x10, 0x19, 0x1C, 0x1D, 0x1E, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1E, 0x1D, 0x1C, 0x19, - 0x10, 0x05, 0x02, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x05, - }, { // mw-shaped - 0x10, 0x1C, 0x1D, 0x1E, 0x1E, 0x1F, 0x1F, 0x1E, 0x1C, 0x1E, 0x1F, 0x1F, 0x1E, 0x1E, 0x1D, 0x1C, - 0x10, 0x03, 0x02, 0x01, 0x01, 0x00, 0x00, 0x01, 0x03, 0x01, 0x00, 0x00, 0x01, 0x01, 0x02, 0x03, - }, { // square - 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, 0x1E, - 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, - }, { // triangle - 0x10, 0x0C, 0x08, 0x04, 0x01, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x1F, 0x1C, 0x18, 0x14, - 0x10, 0x0C, 0x08, 0x04, 0x01, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, 0x1F, 0x1C, 0x18, 0x14, - }, { // saw-tooth - 0x00, 0x01, 0x02, 0x03, 0x04, 0x06, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, - 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, - }, { // sigmoid - 0x07, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x1F, 0x1F, 0x1E, 0x1D, 0x1C, 0x1B, 0x1A, 0x19, - 0x08, 0x06, 0x05, 0x03, 0x02, 0x01, 0x00, 0x00, 0x0F, 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x16, - }, { // MW-shaped - 0x1F, 0x1E, 0x1D, 0x1D, 0x1C, 0x1A, 0x17, 0x0F, 0x0F, 0x17, 0x1A, 0x1C, 0x1D, 0x1D, 0x1E, 0x1F, - 0x00, 0x01, 0x02, 0x02, 0x03, 0x05, 0x08, 0x0F, 0x0F, 0x08, 0x05, 0x03, 0x02, 0x02, 0x01, 0x00 - } -}; - -// AEBC -static const int control_offsets[14] = { - 0, 7, 20, 33, 46, 56, 75, 88, 116, 126, 136, 152, 165, 181 -}; - -// AED8 -static const byte control_data[205] = { - /* 0*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0xFF, - /* 7*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x01, 0x00, 0xF0, 0x3A, 0x00, 0xFD, 0xFF, - /* 20*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x01, 0x00, 0xF0, 0x1D, 0x00, 0xF8, 0xFF, - /* 33*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x02, 0x00, 0xF0, 0x1E, 0x00, 0xFC, 0xFF, - /* 46*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x07, 0x00, 0xE0, 0xFF, - /* 56*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x01, 0x00, 0xD8, 0xF0, 0x00, 0xD8, 0x01, 0x00, 0x00, 0x04, 0x00, 0xF0, 0xFF, - /* 75*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x03, 0x00, 0xF8, 0x6E, 0x00, 0xFF, 0xFF, - /* 88*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x08, 0x00, 0xF0, 0xF0, 0x00, 0xD0, 0x01, 0x00, 0x00, 0x05, 0x00, 0xF0, 0xF0, 0x00, 0xB8, 0xE6, 0x80, 0xFF, 0xE6, 0x80, 0xFF, 0xFF, - /*116*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x05, 0x00, 0xD0, 0xFF, - /*126*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x04, 0x00, 0xF8, 0xFF, - /*136*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x03, 0x00, 0xF4, 0xE6, 0xC0, 0xFF, 0xE6, 0xC0, 0xFF, 0xFF, - /*152*/ 0xF0, 0x00, 0xD0, 0x01, 0x00, 0x00, 0x02, 0x00, 0x10, 0x0E, 0x00, 0xFE, 0xFF, - /*165*/ 0xF0, 0x00, 0xA8, 0x01, 0x00, 0x00, 0x18, 0x00, 0x02, 0xE6, 0x80, 0xFE, 0xE6, 0xC0, 0xFF, 0xFF, - /*181*/ 0xF0, 0x00, 0xF8, 0x01, 0x00, 0x00, 0x02, 0x00, 0xF8, 0x02, 0x00, 0x00, 0x02, 0x00, 0xF0, 0x01, 0x00, 0xF8, 0x02, 0x00, 0x08, 0xF1, 0x99, 0xAF -}; - -static const uint16 lookup_table[87] = { - 0x0D40, 0x0C80, 0x0BC0, 0x0B20, 0x0A80, 0x09E0, 0x0940, 0x08C0, - 0x0840, 0x07E0, 0x0760, 0x0700, 0x06A0, 0x0640, 0x05E0, 0x0590, - 0x0540, 0x04F0, 0x04A0, 0x0460, 0x0420, 0x03F0, 0x03B0, 0x0380, - 0x0350, 0x0320, 0x02F0, 0x02C8, 0x02A0, 0x0278, 0x0250, 0x0230, - 0x0210, 0x01F8, 0x01D8, 0x01C0, 0x01A8, 0x0190, 0x0178, 0x0164, - 0x0150, 0x013C, 0x0128, 0x0118, 0x0108, 0x00FC, 0x00EC, 0x00E0, - 0x00D4, 0x00C8, 0x00BC, 0x00B2, 0x00A8, 0x009E, 0x0094, 0x008C, - 0x0084, 0x007E, 0x0076, 0x0070, 0x006A, 0x0064, 0x005E, 0x0059, - 0x0054, 0x004F, 0x004A, 0x0046, 0x0042, 0x003F, 0x003B, 0x0038, - 0x0035, 0x0032, 0x0030, 0x002D, 0x002A, 0x0028, 0x0026, 0x0024, - 0x0022, 0x0020, 0x001E, 0x001C, 0x001B, 0x8E82, 0xB500 -}; - -// B27B -static const uint16 freq_offset[3] = { - 0, 2, 9 -}; - -static const uint16 freq_table[] = { - 0x0000, 0x0800, - 0xFFB0, 0xFFD1, 0xFFE8, 0xFFF1, 0x0005, 0x0000, 0x0800, - 0xFF9C, 0xFFD8, 0x0000, 0x000F, 0x0005, 0x0000, 0x0800 -}; - -static const int sound_table[13] = { - 0, 2, 3, 4, 5, 6, 7, 8, 9, 11, 1, 10, 11 -}; - -// 0xAE12 -// Note: -// - offsets relative to data_table -// - byte one of each sound was always 0x3F (= use all channels) -> removed from table -static const uint16 sounds[13][6] = { - { 481, 481, 481, 481, 481, 481 }, - { 395, 408, 467, 480, 480, 480 }, - { 85, 96, 109, 109, 109, 109 }, - { 110, 121, 134, 134, 134, 134 }, - { 135, 146, 159, 159, 159, 159 }, - { 160, 171, 184, 184, 184, 184 }, - { 185, 196, 209, 209, 209, 209 }, - { 210, 221, 234, 234, 234, 234 }, - { 235, 246, 259, 259, 259, 259 }, - { 260, 271, 284, 284, 284, 284 }, - { 285, 298, 311, 324, 335, 348 }, - { 349, 360, 361, 362, 373, 384 }, - { 0, 84, 84, 84, 84, 84 } // unused -}; - -// 0xB2A1 -static const byte data_table[482] = { - /* 0*/ 0xE2, 0x0A, 0xE1, 0x0D, 0xE6, 0xED, 0xE0, 0x0F, 0xE2, 0x00, 0xE1, 0x00, - 0xF2, 0xF2, 0xB2, 0xE1, 0x01, 0xF2, 0xF2, 0xB2, 0xE1, 0x02, 0xF2, 0xF2, - 0xB2, 0xE1, 0x03, 0xF2, 0xF2, 0xB2, 0xE1, 0x04, 0xF2, 0xF2, 0xB2, 0xE1, - 0x05, 0xF2, 0xF2, 0xB2, 0xE1, 0x06, 0xF2, 0xF2, 0xB2, 0xE1, 0x07, 0xF2, - 0xF2, 0xB2, 0xE1, 0x08, 0xF2, 0xF2, 0xB2, 0xE1, 0x09, 0xF2, 0xF2, 0xB2, - 0xE1, 0x0A, 0xF2, 0xF2, 0xB2, 0xE1, 0x0B, 0xF2, 0xF2, 0xB2, 0xE1, 0x0C, - 0xF2, 0xF2, 0xB2, 0xE1, 0x0D, 0xF2, 0xF2, 0xB2, 0xFF, 0xD1, 0x03, 0xF3, - /* 84*/ 0xFF, - - /* 85*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x07, 0xFF, - /* 96*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x07, 0xFF, - /*109*/ 0xFF, - - /*110*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x27, 0xFF, - /*121*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x27, 0xFF, - /*134*/ 0xFF, - - /*135*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x47, 0xFF, - /*146*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x47, 0xFF, - /*159*/ 0xFF, - - /*160*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x57, 0xFF, - /*171*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x57, 0xFF, - /*184*/ 0xFF, - - /*185*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x77, 0xFF, - /*196*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x77, 0xFF, - /*209*/ 0xFF, - - /*210*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0x97, 0xFF, - /*221*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x97, 0xFF, - /*234*/ 0xFF, - - /*235*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD3, 0xB7, 0xFF, - /*246*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0xB7, 0xFF, - /*259*/ 0xFF, - - /*260*/ 0xE2, 0x0C, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD4, 0x07, 0xFF, - /*271*/ 0xE2, 0x06, 0xE1, 0x02, 0xE0, 0x0F, 0xE6, 0xED, 0xD5, 0xF0, 0x0C, 0x07, 0xFF, - /*284*/ 0xFF, - - /*285*/ 0xE2, 0x0B, 0xE1, 0x04, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x14, 0x0E, 0xFF, - /*298*/ 0xE2, 0x0B, 0xE1, 0x04, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x32, 0x1E, 0xFF, - /*311*/ 0xE2, 0x0B, 0xE1, 0x0B, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x50, 0x1E, 0xFF, - /*324*/ 0xE2, 0x0B, 0xE1, 0x0B, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0x0E, 0xFF, - /*335*/ 0xE2, 0x0B, 0xE1, 0x02, 0xE6, 0xED, 0xE0, 0x0A, 0xD0, 0xDB, 0x0A, 0x0E, 0xFF, - /*348*/ 0xFF, - - /*349*/ 0xE2, 0x03, 0xE1, 0x01, 0xE6, 0xED, 0xE0, 0x06, 0xD6, 0x17, 0xFF, - /*360*/ 0xFF, - /*361*/ 0xFF, - /*362*/ 0xE2, 0x04, 0xE1, 0x04, 0xE6, 0xED, 0xE0, 0x06, 0xD5, 0xA7, 0xFF, - /*373*/ 0xE2, 0x03, 0xE1, 0x06, 0xE6, 0xED, 0xE0, 0x06, 0xD6, 0x37, 0xFF, - /*384*/ 0xE2, 0x04, 0xE1, 0x06, 0xE6, 0xED, 0xE0, 0x06, 0xD3, 0x87, 0xFF, - - /*395*/ 0xE2, 0x0C, 0xE1, 0x00, 0xE0, 0x04, 0xE6, 0xED, 0xD4, 0x0B, 0xE8, 0x0B, 0xFF, - /*408*/ 0xE2, 0x0C, 0xE1, 0x03, 0xE0, 0x04, 0xE6, 0xED, 0xD4, 0xF0, 0x0C, 0x00, - 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, - 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, - 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, - 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xE8, 0x00, 0xE8, 0x10, 0xFF, - /*467*/ 0xE2, 0x0C, 0xE1, 0x00, 0xE0, 0x04, 0xE6, 0xED, 0xD4, 0x1B, 0xE8, 0x1B, 0xFF, - /*480*/ 0xFF, - - /*481*/ 0xFF -}; - - -/* - * PSG_HuC6280 - */ - -class PSG_HuC6280 { -private: - typedef struct { - uint16 frequency; - uint8 control; - uint8 balance; - uint8 waveform[32]; - uint8 index; - int16 dda; - uint32 counter; - } channel_t; - - double _clock; - double _rate; - uint8 _select; - uint8 _balance; - channel_t _channel[8]; - int16 _volumeTable[32]; - uint32 _noiseFreqTable[32]; - uint32 _waveFreqTable[4096]; - -public: - void init(); - void reset(); - void write(int offset, byte data); - void update(int16* samples, int sampleCnt); - - PSG_HuC6280(double clock, double samplerate); -}; - -PSG_HuC6280::PSG_HuC6280(double clock, double samplerate) { - _clock = clock; - _rate = samplerate; - - // Initialize PSG_HuC6280 emulator - init(); -} - -void PSG_HuC6280::init() { - int i; - double step; - - // Loudest volume level for table - double level = 65535.0 / 6.0 / 32.0; - - // Clear context - reset(); - - // Make waveform frequency table - for (i = 0; i < 4096; i++) { - step = ((_clock / _rate) * 4096) / (i+1); - _waveFreqTable[(1 + i) & 0xFFF] = (uint32)step; - } - - // Make noise frequency table - for (i = 0; i < 32; i++) { - step = ((_clock / _rate) * 32) / (i+1); - _noiseFreqTable[i] = (uint32)step; - } - - // Make volume table - // PSG_HuC6280 has 48dB volume range spread over 32 steps - step = 48.0 / 32.0; - for (i = 0; i < 31; i++) { - _volumeTable[i] = (uint16)level; - level /= pow(10.0, step / 20.0); - } - _volumeTable[31] = 0; -} - -void PSG_HuC6280::reset() { - _select = 0; - _balance = 0xFF; - memset(_channel, 0, sizeof(_channel)); - memset(_volumeTable, 0, sizeof(_volumeTable)); - memset(_noiseFreqTable, 0, sizeof(_noiseFreqTable)); - memset(_waveFreqTable, 0, sizeof(_waveFreqTable)); -} - -void PSG_HuC6280::write(int offset, byte data) { - channel_t *chan = &_channel[_select]; - - switch(offset & 0x0F) { - case 0x00: // Channel select - _select = data & 0x07; - break; - - case 0x01: // Global balance - _balance = data; - break; - - case 0x02: // Channel frequency (LSB) - chan->frequency = (chan->frequency & 0x0F00) | data; - chan->frequency &= 0x0FFF; - break; - - case 0x03: // Channel frequency (MSB) - chan->frequency = (chan->frequency & 0x00FF) | (data << 8); - chan->frequency &= 0x0FFF; - break; - - case 0x04: // Channel control (key-on, DDA mode, volume) - // 1-to-0 transition of DDA bit resets waveform index - if ((chan->control & 0x40) && ((data & 0x40) == 0)) { - chan->index = 0; - } - chan->control = data; - break; - - case 0x05: // Channel balance - chan->balance = data; - break; - - case 0x06: // Channel waveform data - switch(chan->control & 0xC0) { - case 0x00: - chan->waveform[chan->index & 0x1F] = data & 0x1F; - chan->index = (chan->index + 1) & 0x1F; - break; - - case 0x40: - break; - - case 0x80: - chan->waveform[chan->index & 0x1F] = data & 0x1F; - chan->index = (chan->index + 1) & 0x1F; - break; - - case 0xC0: - chan->dda = data & 0x1F; - break; - } - - break; - - case 0x07: // Noise control (enable, frequency) - case 0x08: // LFO frequency - case 0x09: // LFO control (enable, mode) - break; - - default: - break; - } -} - -void PSG_HuC6280::update(int16* samples, int sampleCnt) { - static const int scale_tab[] = { - 0x00, 0x03, 0x05, 0x07, 0x09, 0x0B, 0x0D, 0x0F, - 0x10, 0x13, 0x15, 0x17, 0x19, 0x1B, 0x1D, 0x1F - }; - int ch; - int i; - - int lmal = (_balance >> 4) & 0x0F; - int rmal = (_balance >> 0) & 0x0F; - int vll, vlr; - - lmal = scale_tab[lmal]; - rmal = scale_tab[rmal]; - - // Clear buffer - memset(samples, 0, 2 * sampleCnt * sizeof(int16)); - - for (ch = 0; ch < 6; ch++) { - // Only look at enabled channels - if (_channel[ch].control & 0x80) { - int lal = (_channel[ch].balance >> 4) & 0x0F; - int ral = (_channel[ch].balance >> 0) & 0x0F; - int al = _channel[ch].control & 0x1F; - - lal = scale_tab[lal]; - ral = scale_tab[ral]; - - // Calculate volume just as the patent says - vll = (0x1F - lal) + (0x1F - al) + (0x1F - lmal); - if (vll > 0x1F) vll = 0x1F; - - vlr = (0x1F - ral) + (0x1F - al) + (0x1F - rmal); - if (vlr > 0x1F) vlr = 0x1F; - - vll = _volumeTable[vll]; - vlr = _volumeTable[vlr]; - - // Check channel mode - if (_channel[ch].control & 0x40) { - /* DDA mode */ - for (i = 0; i < sampleCnt; i++) { - samples[2*i] += (int16)(vll * (_channel[ch].dda - 16)); - samples[2*i + 1] += (int16)(vlr * (_channel[ch].dda - 16)); - } - } else { - /* Waveform mode */ - uint32 step = _waveFreqTable[_channel[ch].frequency]; - for (i = 0; i < sampleCnt; i += 1) { - int offset; - int16 data; - offset = (_channel[ch].counter >> 12) & 0x1F; - _channel[ch].counter += step; - _channel[ch].counter &= 0x1FFFF; - data = _channel[ch].waveform[offset]; - samples[2*i] += (int16)(vll * (data - 16)); - samples[2*i + 1] += (int16)(vlr * (data - 16)); - } - } - } - } -} - - -/* - * Player_PCE - */ - -void Player_PCE::PSG_Write(int reg, byte data) { - _psg->write(reg, data); -} - -void Player_PCE::setupWaveform(byte bank) { - const byte *ptr = wave_table[bank]; - PSG_Write(4, 0x40); - PSG_Write(4, 0x00); - for (int i = 0; i < 32; ++i) { - PSG_Write(6, ptr[i]); - } -} - -// A541 -void Player_PCE::procA541(channel_t *channel) { - channel->soundDataPtr = NULL; - channel->controlVecShort10 = 0; - - channel->controlVecShort03 = 0; - channel->controlVecShort06 = 0; - channel->controlVec8 = 0; - channel->controlVec9 = 0; - channel->controlVec10 = 0; - channel->soundUpdateCounter = 0; - channel->controlVec18 = 0; - channel->controlVec19 = 0; - channel->controlVec23 = false; - channel->controlVec24 = false; - channel->controlVec21 = 0; - - channel->waveformCtrl = 0x80; -} - -// A592 -void Player_PCE::startSound(int sound) { - channel_t *channel; - const uint16 *ptr = sounds[sound_table[sound]]; - - for (int i = 0; i < 6; ++i) { - channel = &channels[i]; - procA541(channel); - - channel->controlVec24 = true; - channel->waveformCtrl = 0; - channel->controlVec0 = 0; - channel->controlVec19 = 0; - channel->controlVec18 = 0; - channel->soundDataPtr = &data_table[*ptr++]; - } -} - -// A64B -void Player_PCE::updateSound() { - for (int i = 0; i < 12; i++) { - channel_t *channel = &channels[i]; - bool cond = true; - if (i < 6) { - channel->controlVec21 ^= 0xFF; - if (!channel->controlVec21) - cond = false; - } - if (cond) { - processSoundData(channel); - procAB7F(channel); - procAC24(channel); - channel->controlVec11 = (channel->controlVecShort10 >> 11) | 0x80; - channel->balance = channel->balance2; - } - } - - for (int i = 0; i < 6; ++i) { - procA731(&channels[i]); - } -} - -int Player_PCE::readBuffer(int16 *buffer, const int numSamples) { - int sampleCopyCnt; - int samplesLeft = numSamples; - - Common::StackLock lock(_mutex); - - while (true) { - // copy samples to output buffer - sampleCopyCnt = (samplesLeft < _sampleBufferCnt) ? samplesLeft : _sampleBufferCnt; - if (sampleCopyCnt > 0) { - memcpy(buffer, _sampleBuffer, sampleCopyCnt * sizeof(int16)); - buffer += sampleCopyCnt; - samplesLeft -= sampleCopyCnt; - _sampleBufferCnt -= sampleCopyCnt; - } - - if (samplesLeft == 0) - break; - - // retrieve samples for one timer period - updateSound(); - _psg->update(_sampleBuffer, _samplesPerPeriod / 2); - _sampleBufferCnt = _samplesPerPeriod; - } - - // copy remaining samples to the front of the buffer - if (_sampleBufferCnt > 0) { - memmove(&_sampleBuffer[0], - &_sampleBuffer[_samplesPerPeriod - _sampleBufferCnt], - _sampleBufferCnt * sizeof(int16)); - } - - return numSamples; -} - -void Player_PCE::procA731(channel_t *channel) { - PSG_Write(0, channel->id); - PSG_Write(2, channel->freq & 0xFF); - PSG_Write(3, (channel->freq >> 8) & 0xFF); - - int tmp = channel->controlVec11; - if ((channel->controlVec11 & 0xC0) == 0x80) { - tmp = channel->controlVec11 & 0x1F; - if (tmp != 0) { - tmp -= channel->controlVec0; - if (tmp >= 0) { - tmp |= 0x80; - } else { - tmp = 0; - } - } - } - - PSG_Write(5, channel->balance); - if ((channel->waveformCtrl & 0x80) == 0) { - channel->waveformCtrl |= 0x80; - PSG_Write(0, channel->id); - setupWaveform(channel->waveformCtrl & 0x7F); - } - - PSG_Write(4, tmp); -} - -// A793 -void Player_PCE::processSoundData(channel_t *channel) { - channel->soundUpdateCounter--; - if (channel->soundUpdateCounter > 0) { - return; - } - - while (true) { - const byte *ptr = channel->soundDataPtr; - byte value = (ptr ? *ptr++ : 0xFF); - if (value < 0xD0) { - int mult = (value & 0x0F) + 1; - channel->soundUpdateCounter = mult * channel->controlVec1; - value >>= 4; - procAA62(channel, value); - channel->soundDataPtr = ptr; - return; - } - - // jump_table (A7F7) - switch (value - 0xD0) { - case 0: /*A85A*/ - case 1: /*A85D*/ - case 2: /*A861*/ - case 3: /*A865*/ - case 4: /*A869*/ - case 5: /*A86D*/ - case 6: /*A871*/ - channel->controlVec2 = (value - 0xD0) * 12; - break; - case 11: /*A8A8*/ - channel->controlVecShort06 = (int8)*ptr++; - break; - case 16: /*A8C2*/ - channel->controlVec1 = *ptr++; - break; - case 17: /*A8CA*/ - channel->waveformCtrl = *ptr++; - break; - case 18: /*A8D2*/ - channel->controlVec10 = *ptr++; - break; - case 22: /*A8F2*/ - value = *ptr; - channel->balance = value; - channel->balance2 = value; - ptr++; - break; - case 24: /*A905*/ - channel->controlVec23 = true; - break; - case 32: /*A921*/ - ptr++; - break; - case 47: - channel->controlVec24 = false; - channel->controlVec10 &= 0x7F; - channel->controlVecShort10 &= 0x00FF; - return; - default: - // unused -> ignore - break; - } - - channel->soundDataPtr = ptr; - } -} - -void Player_PCE::procAA62(channel_t *channel, int a) { - procACEA(channel, a); - if (channel->controlVec23) { - channel->controlVec23 = false; - return; - } - - channel->controlVec18 = 0; - - channel->controlVec10 |= 0x80; - int y = channel->controlVec10 & 0x7F; - channel->controlBufferPos = &control_data[control_offsets[y]]; - channel->controlVec5 = 0; -} - -void Player_PCE::procAB7F(channel_t *channel) { - uint16 freqValue = channel->controlVecShort02; - channel->controlVecShort02 += channel->controlVecShort03; - - int pos = freq_offset[channel->controlVec19] + channel->controlVec18; - freqValue += freq_table[pos]; - if (freq_table[pos + 1] != 0x0800) { - channel->controlVec18++; - } - freqValue += channel->controlVecShort06; - - channel->freq = freqValue; -} - -void Player_PCE::procAC24(channel_t *channel) { - if ((channel->controlVec10 & 0x80) == 0) - return; - - if (channel->controlVec5 == 0) { - const byte *ctrlPtr = channel->controlBufferPos; - byte value = *ctrlPtr++; - while (value >= 0xF0) { - if (value == 0xF0) { - channel->controlVecShort10 = READ_LE_UINT16(ctrlPtr); - ctrlPtr += 2; - } else if (value == 0xFF) { - channel->controlVec10 &= 0x7F; - return; - } else { - // unused - } - value = *ctrlPtr++; - } - channel->controlVec5 = value; - channel->controlVecShort09 = READ_LE_UINT16(ctrlPtr); - ctrlPtr += 2; - channel->controlBufferPos = ctrlPtr; - } - - channel->controlVecShort10 += channel->controlVecShort09; - channel->controlVec5--; -} - -void Player_PCE::procACEA(channel_t *channel, int a) { - int x = a + - channel->controlVec2 + - channel->controlVec8 + - channel->controlVec9; - channel->controlVecShort02 = lookup_table[x]; -} - -Player_PCE::Player_PCE(ScummEngine *scumm, Audio::Mixer *mixer) { - for (int i = 0; i < 12; ++i) { - memset(&channels[i], 0, sizeof(channel_t)); - channels[i].id = i; - } - - _mixer = mixer; - _sampleRate = _mixer->getOutputRate(); - _vm = scumm; - - _samplesPerPeriod = 2 * (int)(_sampleRate / UPDATE_FREQ); - _sampleBuffer = new int16[_samplesPerPeriod]; - _sampleBufferCnt = 0; - - _psg = new PSG_HuC6280(PSG_CLOCK, _sampleRate); - - _mixer->playStream(Audio::Mixer::kPlainSoundType, &_soundHandle, this, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO, true); -} - -Player_PCE::~Player_PCE() { - _mixer->stopHandle(_soundHandle); - delete[] _sampleBuffer; - delete _psg; -} - -void Player_PCE::stopSound(int nr) { - // TODO: implement -} - -void Player_PCE::stopAllSounds() { - // TODO: implement -} - -int Player_PCE::getSoundStatus(int nr) const { - // TODO: status for each sound - for (int i = 0; i < 6; ++i) { - if (channels[i].controlVec24) - return 1; - } - return 0; -} - -int Player_PCE::getMusicTimer() { - return 0; -} - -} // End of namespace Scumm - -#endif // USE_RGB_COLOR |