From 7a7857f47b33f1b63fb585d2dc6c60d87c3e928f Mon Sep 17 00:00:00 2001 From: aliaspider Date: Mon, 9 Nov 2015 19:55:28 +0100 Subject: C++ --> C99 --- src/apu.cpp | 1002 ----------------------------------------------------------- 1 file changed, 1002 deletions(-) delete mode 100644 src/apu.cpp (limited to 'src/apu.cpp') diff --git a/src/apu.cpp b/src/apu.cpp deleted file mode 100644 index 48ee2d8..0000000 --- a/src/apu.cpp +++ /dev/null @@ -1,1002 +0,0 @@ -/* - * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator. - * - * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and - * Jerremy Koot (jkoot@snes9x.com) - * - * Super FX C emulator code - * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and - * Gary Henderson. - * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_. - * - * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson. - * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_. - * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com). - * - * DOS port code contains the works of other authors. See headers in - * individual files. - * - * Snes9x homepage: http://www.snes9x.com - * - * Permission to use, copy, modify and 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. - * - * Snes9x is freeware for PERSONAL USE only. Commercial users should - * seek permission of the copyright holders first. Commercial use includes - * charging money for Snes9x or software derived from Snes9x. - * - * 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. - */ - -#include "snes9x.h" -#include "spc700.h" -#include "apu.h" -#include "soundux.h" -#include "cpuexec.h" - -/* For note-triggered SPC dump support */ -//#include "snapshot.h" - -//extern int NoiseFreq [32]; - -#undef ABS -#define ABS(a) ((a) < 0 ? -(a) : (a)) -#define ENVX_SHIFT 24 - - -unsigned long AttackRate [16] = { - 4100, 2600, 1500, 1000, 640, 380, 260, 160, - 96, 64, 40, 24, 16, 10, 6, 1 -}; - -unsigned long DecayRate [8] = { - 1200, 740, 440, 290, 180, 110, 74, 37 -}; - -unsigned long SustainRate [32] = { - /*~0*/0xFFFFFFFF, 38000, 28000, 24000, 19000, 14000, 12000, 9400, - 7100, 5900, 4700, 3500, 2900, 2400, 1800, 1500, - 1200, 880, 740, 590, 440, 370, 290, 220, - 180, 150, 110, 92, 74, 55, 37, 18 -}; - -unsigned long IncreaseRate [32] = { - /*~0*/0xFFFFFFFF, 4100, 3100, 2600, 2000, 1500, 1300, 1000, - 770, 640, 510, 380, 320, 260, 190, 160, - 130, 96, 80, 64, 48, 40, 32, 24, - 20, 16, 12, 10, 8, 6, 4, 2 -}; - -unsigned long DecreaseRateExp [32] = { - /*~0*/0xFFFFFFFF, 38000, 28000, 24000, 19000, 14000, 12000, 9400, - 7100, 5900, 4700, 3500, 2900, 2400, 1800, 1500, - 1200, 880, 740, 590, 440, 370, 290, 220, - 180, 150, 110, 92, 74, 55, 37, 18 -}; - -// precalculated env rates for S9xSetEnvRate -unsigned long AttackERate [16][10]; -unsigned long DecayERate [8][10]; -unsigned long SustainERate [32][10]; -unsigned long IncreaseERate [32][10]; -unsigned long DecreaseERateExp[32][10]; -unsigned long KeyOffERate[10]; - - -static inline void S9xSetEnvelopeRate (int channel, unsigned long rate, int direction, int target, unsigned int mode) -{ - S9xSetEnvRate (&SoundData.channels [channel], rate, direction, target, mode); -} - -static inline void S9xSetSoundADSR (int channel, int attack_ind, int decay_ind, - int sustain_ind, int sustain_level, int release_rate) -{ - int attack_rate = AttackRate [attack_ind]; - int decay_rate = DecayRate [decay_ind]; - int sustain_rate = SustainRate [sustain_ind]; - - // Hack for ROMs that use a very short attack rate, key on a - // channel, then switch to decay mode. e.g. Final Fantasy II. - if (attack_rate == 1) - attack_rate = 0; - - SoundData.channels[channel].env_ind_attack = attack_ind; - SoundData.channels[channel].env_ind_decay = decay_ind; - SoundData.channels[channel].env_ind_sustain = sustain_ind; - - SoundData.channels[channel].attack_rate = attack_rate; - SoundData.channels[channel].decay_rate = decay_rate; - SoundData.channels[channel].sustain_rate = sustain_rate; - SoundData.channels[channel].release_rate = release_rate; - SoundData.channels[channel].sustain_level = sustain_level + 1; - - switch (SoundData.channels[channel].state) - { - case SOUND_ATTACK: - S9xSetEnvelopeRate (channel, attack_rate, 1, 127, 0); - break; - - case SOUND_DECAY: - S9xSetEnvelopeRate (channel, decay_rate, -1, - (MAX_ENVELOPE_HEIGHT * (sustain_level + 1)) >> 3, 1<<28); - break; - case SOUND_SUSTAIN: - S9xSetEnvelopeRate (channel, sustain_rate, -1, 0, 2<<28); - break; - } -} - -static inline void S9xSetSoundVolume (int channel, short volume_left, short volume_right) -{ - Channel *ch = &SoundData.channels[channel]; - if (!so.stereo) - volume_left = (ABS(volume_right) + ABS(volume_left)) / 2; - - ch->volume_left = volume_left; - ch->volume_right = volume_right; - ch-> left_vol_level = (ch->envx * volume_left) / 128; - ch->right_vol_level = (ch->envx * volume_right) / 128; -} - -static inline void S9xSetMasterVolume (short volume_left, short volume_right) -{ - if (Settings.DisableMasterVolume) - { - SoundData.master_volume_left = 127; - SoundData.master_volume_right = 127; - SoundData.master_volume [0] = SoundData.master_volume [1] = 127; - } - else - { - if (!so.stereo) - volume_left = (ABS (volume_right) + ABS (volume_left)) / 2; - SoundData.master_volume_left = volume_left; - SoundData.master_volume_right = volume_right; - SoundData.master_volume [0] = volume_left; - SoundData.master_volume [1] = volume_right; - } -} - -static inline void S9xSetEchoVolume (short volume_left, short volume_right) -{ - if (!so.stereo) - volume_left = (ABS (volume_right) + ABS (volume_left)) / 2; - SoundData.echo_volume_left = volume_left; - SoundData.echo_volume_right = volume_right; - SoundData.echo_volume [0] = volume_left; - SoundData.echo_volume [1] = volume_right; -} - -static inline void S9xSetEchoWriteEnable (uint8 byte) -{ - SoundData.echo_write_enabled = byte; - S9xSetEchoDelay (APU.DSP [APU_EDL] & 15); -} - -static inline void S9xSetFrequencyModulationEnable (uint8 byte) -{ - SoundData.pitch_mod = byte & (0xFE);//~1; -} - -static inline int S9xGetEnvelopeHeight (int channel) -{ - if ((Settings.SoundEnvelopeHeightReading || - SNESGameFixes.SoundEnvelopeHeightReading2) && - SoundData.channels[channel].state != SOUND_SILENT && - SoundData.channels[channel].state != SOUND_GAIN) - { - return (SoundData.channels[channel].envx); - } - - //siren fix from XPP - if (SNESGameFixes.SoundEnvelopeHeightReading2 && - SoundData.channels[channel].state != SOUND_SILENT) - { - return (SoundData.channels[channel].envx); - } - - return (0); -} - -static inline void S9xSetSoundHertz (int channel, int hertz) -{ - SoundData.channels[channel].hertz = hertz; - S9xSetSoundFrequency (channel, hertz); -} - -static inline void S9xSetSoundType (int channel, int type_of_sound) -{ - SoundData.channels[channel].type = type_of_sound; -} - -static inline bool8 S9xSetSoundMode (int channel, int mode) -{ - Channel *ch = &SoundData.channels[channel]; - - switch (mode) - { - case MODE_RELEASE: - if (ch->mode != MODE_NONE) - { - ch->mode = MODE_RELEASE; - return (TRUE); - } - break; - - case MODE_DECREASE_LINEAR: - case MODE_DECREASE_EXPONENTIAL: - case MODE_GAIN: - if (ch->mode != MODE_RELEASE) - { - ch->mode = mode; - if (ch->state != SOUND_SILENT) - ch->state = mode; - - return (TRUE); - } - break; - - case MODE_INCREASE_LINEAR: - case MODE_INCREASE_BENT_LINE: - if (ch->mode != MODE_RELEASE) - { - ch->mode = mode; - if (ch->state != SOUND_SILENT) - ch->state = mode; - - - - - return (TRUE); - } - break; - - case MODE_ADSR: - if (ch->mode == MODE_NONE || ch->mode == MODE_ADSR) - { - ch->mode = mode; - return (TRUE); - } - } - - return (FALSE); -} - -static inline void S9xPlaySample (int channel) -{ - Channel *ch = &SoundData.channels[channel]; - - ch->state = SOUND_SILENT; - ch->mode = MODE_NONE; - ch->envx = 0; - ch->envxx = 0; - - ch->g_index=0; - ch->gaussian[0]=ch->gaussian[1]=ch->gaussian[2]=ch->gaussian[3]=0; - - S9xFixEnvelope (channel, - APU.DSP [APU_GAIN + (channel << 4)], - APU.DSP [APU_ADSR1 + (channel << 4)], - APU.DSP [APU_ADSR2 + (channel << 4)]); - - ch->sample_number = APU.DSP [APU_SRCN + channel * 0x10]; - if (APU.DSP [APU_NON] & (1 << channel)) - ch->type = SOUND_NOISE; - else - ch->type = SOUND_SAMPLE; - - S9xSetSoundFrequency (channel, ch->hertz); - ch->loop = FALSE; - ch->needs_decode = TRUE; - ch->last_block = FALSE; - ch->previous [0] = ch->previous[1] = 0; - ch->block_pointer = *S9xGetSampleAddress(ch->sample_number); - ch->sample_pointer = 0; - ch->env_error = 0; - ch->next_sample = 0; - ch->interpolate = 0; - ch->last_valid_header=0; - switch (ch->mode) - { - case MODE_ADSR: - if (ch->attack_rate == 0) - { - if (ch->decay_rate == 0 || ch->sustain_level == 8) - { - ch->state = SOUND_SUSTAIN; - ch->envx = (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3; - S9xSetEnvRate (ch, ch->sustain_rate, -1, 0, 2<<28); - } - else - { - ch->state = SOUND_DECAY; - ch->envx = MAX_ENVELOPE_HEIGHT; - S9xSetEnvRate (ch, ch->decay_rate, -1, - (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3, 1<<28); - } - ch-> left_vol_level = (ch->envx * ch->volume_left) / 128; - ch->right_vol_level = (ch->envx * ch->volume_right) / 128; - } - else - { - ch->state = SOUND_ATTACK; - ch->envx = 0; - ch->left_vol_level = 0; - ch->right_vol_level = 0; - S9xSetEnvRate (ch, ch->attack_rate, 1, MAX_ENVELOPE_HEIGHT, 0); - } - ch->envxx = ch->envx << ENVX_SHIFT; - break; - - case MODE_GAIN: - ch->state = SOUND_GAIN; - break; - - case MODE_INCREASE_LINEAR: - ch->state = SOUND_INCREASE_LINEAR; - break; - - case MODE_INCREASE_BENT_LINE: - ch->state = SOUND_INCREASE_BENT_LINE; - break; - - case MODE_DECREASE_LINEAR: - ch->state = SOUND_DECREASE_LINEAR; - break; - - case MODE_DECREASE_EXPONENTIAL: - ch->state = SOUND_DECREASE_EXPONENTIAL; - break; - - default: - break; - } - - S9xFixEnvelope (channel, - APU.DSP [APU_GAIN + (channel << 4)], - APU.DSP [APU_ADSR1 + (channel << 4)], - APU.DSP [APU_ADSR2 + (channel << 4)]); -} - -extern "C" uint32 Spc700JumpTab_15; - -bool8 S9xInitAPU () -{ - // notaz - memset(&IAPU, 0, sizeof(IAPU)); - IAPU.ExtraRAM = APU.ExtraRAM; - IAPU.asmJumpTab = &Spc700JumpTab_15; // Normal case: ONE_APU_CYCLE = 15 - - IAPU.RAM = (uint8 *) malloc (0x10000); - IAPU.ShadowRAM = NULL;//(uint8 *) malloc (0x10000); - IAPU.CachedSamples = NULL;//(uint8 *) malloc (0x40000); - - if (!IAPU.RAM /*|| !IAPU.ShadowRAM || !IAPU.CachedSamples*/) - { - S9xDeinitAPU (); - return (FALSE); - } - - return (TRUE); -} - -void S9xDeinitAPU () -{ - if (IAPU.RAM) - { - free ((char *) IAPU.RAM); - IAPU.RAM = NULL; - } - if (IAPU.ShadowRAM) - { - free ((char *) IAPU.ShadowRAM); - IAPU.ShadowRAM = NULL; - } - if (IAPU.CachedSamples) - { - free ((char *) IAPU.CachedSamples); - IAPU.CachedSamples = NULL; - } -} - -EXTERN_C uint8 APUROM [64]; - -void S9xResetAPU () -{ -// Settings.APUEnabled = Settings.NextAPUEnabled; - - ZeroMemory(IAPU.RAM, 0x100); - memset(IAPU.RAM+0x20, 0xFF, 0x20); - memset(IAPU.RAM+0x60, 0xFF, 0x20); - memset(IAPU.RAM+0xA0, 0xFF, 0x20); - memset(IAPU.RAM+0xE0, 0xFF, 0x20); - - for(int i=1;i<256;i++) - { - memcpy(IAPU.RAM+(i<<8), IAPU.RAM, 0x100); - } - //ZeroMemory (IAPU.CachedSamples, 0x40000); - ZeroMemory (APU.OutPorts, 4); - IAPU.DirectPage = IAPU.RAM; - memmove (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM)); - memmove (APU.ExtraRAM, APUROM, sizeof (APUROM)); - IAPU.PC = IAPU.RAM + IAPU.RAM [0xfffe] + (IAPU.RAM [0xffff] << 8); - CPU.APU_Cycles = 0; - IAPU.YA.W = 0; - IAPU.X = 0; - IAPU.S = 0xff; - IAPU.P = 0; - S9xAPUUnpackStatus (); - CPU.APU_APUExecuting = Settings.APUEnabled; -#ifdef SPC700_SHUTDOWN - IAPU.WaitAddress1 = NULL; - IAPU.WaitAddress2 = NULL; - IAPU.WaitCounter = 0; -#endif - APU.ShowROM = TRUE; - IAPU.RAM [0xf1] = 0x80; - - int i; - - for (i = 0; i < 3; i++) - { - APU.TimerEnabled [i] = FALSE; - APU.TimerValueWritten [i] = 0; - APU.TimerTarget [i] = 0; - APU.Timer [i] = 0; - } - for (int j = 0; j < 0x80; j++) - APU.DSP [j] = 0; - - IAPU.TwoCycles = IAPU.OneCycle * 2; - - for (i = 0; i < 256; i++) - S9xAPUCycles [i] = S9xAPUCycleLengths [i] * IAPU.OneCycle; - - APU.DSP [APU_ENDX] = 0; - APU.DSP [APU_KOFF] = 0; - APU.DSP [APU_KON] = 0; - APU.DSP [APU_FLG] = APU_MUTE | APU_ECHO_DISABLED; - APU.KeyedChannels = 0; - - S9xResetSound (TRUE); - S9xSetEchoEnable (0); -} - -extern int framecpto; -void S9xSetAPUDSP (uint8 byte) -{ - uint8 reg = IAPU.RAM [0xf2]; - static uint8 KeyOn; - static uint8 KeyOnPrev; - int i; - -/* char str[64]; - if (byte!=0) - { - sprintf(str,"fr : %d\nwrite dsp %d\ncpu cycle=%d pc=%04X",framecpto,byte,CPU.Cycles,CPU.PC-CPU.PCBase); - S9xMessage(0,0,str); - gp32_pause(); - }*/ - - //extern uint8 spc_dump_dsp[0x100]; - - //spc_dump_dsp[reg] = byte; - - switch (reg) - { - case APU_FLG: - if (byte & APU_SOFT_RESET) - { - APU.DSP [reg] = APU_MUTE | APU_ECHO_DISABLED | (byte & 0x1f); - APU.DSP [APU_ENDX] = 0; - APU.DSP [APU_KOFF] = 0; - APU.DSP [APU_KON] = 0; - S9xSetEchoWriteEnable (FALSE); - // Kill sound - S9xResetSound (FALSE); - } - else - { - S9xSetEchoWriteEnable (!(byte & APU_ECHO_DISABLED)); - if (byte & APU_MUTE) - { - S9xSetSoundMute (TRUE); - } - else - S9xSetSoundMute (FALSE); - - SoundData.noise_hertz = NoiseFreq [byte & 0x1f]; - for (i = 0; i < 8; i++) - { - if (SoundData.channels [i].type == SOUND_NOISE) - S9xSetSoundFrequency (i, SoundData.noise_hertz); - } - } - break; - case APU_NON: - if (byte != APU.DSP [APU_NON]) - { - uint8 mask = 1; - for (int c = 0; c < 8; c++, mask <<= 1) - { - int type; - if (byte & mask) - { - type = SOUND_NOISE; - } - else - { - type = SOUND_SAMPLE; - } - S9xSetSoundType (c, type); - } - } - break; - case APU_MVOL_LEFT: - if (byte != APU.DSP [APU_MVOL_LEFT]) - { - S9xSetMasterVolume ((signed char) byte, - (signed char) APU.DSP [APU_MVOL_RIGHT]); - } - break; - case APU_MVOL_RIGHT: - if (byte != APU.DSP [APU_MVOL_RIGHT]) - { - S9xSetMasterVolume ((signed char) APU.DSP [APU_MVOL_LEFT], - (signed char) byte); - } - break; - case APU_EVOL_LEFT: - if (byte != APU.DSP [APU_EVOL_LEFT]) - { - S9xSetEchoVolume ((signed char) byte, - (signed char) APU.DSP [APU_EVOL_RIGHT]); - } - break; - case APU_EVOL_RIGHT: - if (byte != APU.DSP [APU_EVOL_RIGHT]) - { - S9xSetEchoVolume ((signed char) APU.DSP [APU_EVOL_LEFT], - (signed char) byte); - } - break; - case APU_ENDX: - byte = 0; - break; - - case APU_KOFF: - // if (byte) - { - uint8 mask = 1; - for (int c = 0; c < 8; c++, mask <<= 1) - { - if ((byte & mask) != 0) - { - if (APU.KeyedChannels & mask) - { - { - KeyOnPrev&=~mask; - APU.KeyedChannels &= ~mask; - APU.DSP [APU_KON] &= ~mask; - //APU.DSP [APU_KOFF] |= mask; - S9xSetSoundKeyOff (c); - } - } - } - else if((KeyOnPrev&mask)!=0) - { - KeyOnPrev&=~mask; - APU.KeyedChannels |= mask; - //APU.DSP [APU_KON] |= mask; - APU.DSP [APU_KOFF] &= ~mask; - APU.DSP [APU_ENDX] &= ~mask; - S9xPlaySample (c); - } - } - } - //KeyOnPrev=0; - APU.DSP [APU_KOFF] = byte; - return; - case APU_KON: - - if (byte) - { - uint8 mask = 1; - for (int c = 0; c < 8; c++, mask <<= 1) - { - if ((byte & mask) != 0) - { - // Pac-In-Time requires that channels can be key-on - // regardeless of their current state. - if((APU.DSP [APU_KOFF] & mask) ==0) - { - KeyOnPrev&=~mask; - APU.KeyedChannels |= mask; - //APU.DSP [APU_KON] |= mask; - //APU.DSP [APU_KOFF] &= ~mask; - APU.DSP [APU_ENDX] &= ~mask; - S9xPlaySample (c); - } - else KeyOn|=mask; - } - } - } - //spc_is_dumping_temp = byte; - return; - - case APU_VOL_LEFT + 0x00: - case APU_VOL_LEFT + 0x10: - case APU_VOL_LEFT + 0x20: - case APU_VOL_LEFT + 0x30: - case APU_VOL_LEFT + 0x40: - case APU_VOL_LEFT + 0x50: - case APU_VOL_LEFT + 0x60: - case APU_VOL_LEFT + 0x70: -// At Shin Megami Tensei suggestion 6/11/00 -// if (byte != APU.DSP [reg]) - { - S9xSetSoundVolume (reg >> 4, (signed char) byte, - (signed char) APU.DSP [reg + 1]); - } - break; - case APU_VOL_RIGHT + 0x00: - case APU_VOL_RIGHT + 0x10: - case APU_VOL_RIGHT + 0x20: - case APU_VOL_RIGHT + 0x30: - case APU_VOL_RIGHT + 0x40: - case APU_VOL_RIGHT + 0x50: - case APU_VOL_RIGHT + 0x60: - case APU_VOL_RIGHT + 0x70: -// At Shin Megami Tensei suggestion 6/11/00 -// if (byte != APU.DSP [reg]) - { - S9xSetSoundVolume (reg >> 4, (signed char) APU.DSP [reg - 1], - (signed char) byte); - } - break; - - case APU_P_LOW + 0x00: - case APU_P_LOW + 0x10: - case APU_P_LOW + 0x20: - case APU_P_LOW + 0x30: - case APU_P_LOW + 0x40: - case APU_P_LOW + 0x50: - case APU_P_LOW + 0x60: - case APU_P_LOW + 0x70: - S9xSetSoundHertz (reg >> 4, (((byte + (APU.DSP [reg + 1] << 8)) & FREQUENCY_MASK) * 32000) >> 12); - break; - - case APU_P_HIGH + 0x00: - case APU_P_HIGH + 0x10: - case APU_P_HIGH + 0x20: - case APU_P_HIGH + 0x30: - case APU_P_HIGH + 0x40: - case APU_P_HIGH + 0x50: - case APU_P_HIGH + 0x60: - case APU_P_HIGH + 0x70: - S9xSetSoundHertz (reg >> 4, - (((byte << 8) + APU.DSP [reg - 1]) & FREQUENCY_MASK) * 8); - break; - - case APU_SRCN + 0x00: - case APU_SRCN + 0x10: - case APU_SRCN + 0x20: - case APU_SRCN + 0x30: - case APU_SRCN + 0x40: - case APU_SRCN + 0x50: - case APU_SRCN + 0x60: - case APU_SRCN + 0x70: - if (byte != APU.DSP [reg]) - { - //S9xSetSoundSample (reg >> 4, byte); // notaz: seems to be unused? - } - break; - - case APU_ADSR1 + 0x00: - case APU_ADSR1 + 0x10: - case APU_ADSR1 + 0x20: - case APU_ADSR1 + 0x30: - case APU_ADSR1 + 0x40: - case APU_ADSR1 + 0x50: - case APU_ADSR1 + 0x60: - case APU_ADSR1 + 0x70: - if (byte != APU.DSP [reg]) - { - { - S9xFixEnvelope (reg >> 4, APU.DSP [reg + 2], byte, - APU.DSP [reg + 1]); - } - } - break; - - case APU_ADSR2 + 0x00: - case APU_ADSR2 + 0x10: - case APU_ADSR2 + 0x20: - case APU_ADSR2 + 0x30: - case APU_ADSR2 + 0x40: - case APU_ADSR2 + 0x50: - case APU_ADSR2 + 0x60: - case APU_ADSR2 + 0x70: - if (byte != APU.DSP [reg]) - { - { - S9xFixEnvelope (reg >> 4, APU.DSP [reg + 1], APU.DSP [reg - 1], - byte); - } - } - break; - - case APU_GAIN + 0x00: - case APU_GAIN + 0x10: - case APU_GAIN + 0x20: - case APU_GAIN + 0x30: - case APU_GAIN + 0x40: - case APU_GAIN + 0x50: - case APU_GAIN + 0x60: - case APU_GAIN + 0x70: - if (byte != APU.DSP [reg]) - { - { - S9xFixEnvelope (reg >> 4, byte, APU.DSP [reg - 2], - APU.DSP [reg - 1]); - } - } - break; - - case APU_ENVX + 0x00: - case APU_ENVX + 0x10: - case APU_ENVX + 0x20: - case APU_ENVX + 0x30: - case APU_ENVX + 0x40: - case APU_ENVX + 0x50: - case APU_ENVX + 0x60: - case APU_ENVX + 0x70: - break; - - case APU_OUTX + 0x00: - case APU_OUTX + 0x10: - case APU_OUTX + 0x20: - case APU_OUTX + 0x30: - case APU_OUTX + 0x40: - case APU_OUTX + 0x50: - case APU_OUTX + 0x60: - case APU_OUTX + 0x70: - break; - - case APU_DIR: - break; - - case APU_PMON: - if (byte != APU.DSP [APU_PMON]) - { - S9xSetFrequencyModulationEnable (byte); - } - break; - - case APU_EON: - if (byte != APU.DSP [APU_EON]) - { - S9xSetEchoEnable (byte); - } - break; - - case APU_EFB: - S9xSetEchoFeedback ((signed char) byte); - break; - - case APU_ESA: - break; - - case APU_EDL: - S9xSetEchoDelay (byte & 0xf); - break; - - case APU_C0: - case APU_C1: - case APU_C2: - case APU_C3: - case APU_C4: - case APU_C5: - case APU_C6: - case APU_C7: - S9xSetFilterCoefficient (reg >> 4, (signed char) byte); - break; - default: -// XXX -//printf ("Write %02x to unknown APU register %02x\n", byte, reg); - break; - } - - KeyOnPrev|=KeyOn; - KeyOn=0; - - if (reg < 0x80) - APU.DSP [reg] = byte; -} - -void S9xFixEnvelope (int channel, uint8 gain, uint8 adsr1, uint8 adsr2) -{ - if (adsr1 & 0x80) - { - // ADSR mode - - // XXX: can DSP be switched to ADSR mode directly from GAIN/INCREASE/ - // DECREASE mode? And if so, what stage of the sequence does it start - // at? - if (S9xSetSoundMode (channel, MODE_ADSR)) - { - S9xSetSoundADSR (channel, adsr1 & 0xf, (adsr1 >> 4) & 7, adsr2 & 0x1f, (adsr2 >> 5) & 7, 8); - } - } - else - { - // Gain mode - if ((gain & 0x80) == 0) - { - if (S9xSetSoundMode (channel, MODE_GAIN)) - { - S9xSetEnvelopeRate (channel, 0, 0, gain & 0x7f, 0); - S9xSetEnvelopeHeight (channel, gain & 0x7f); - } - } - else - { - - if (gain & 0x40) - { - // Increase mode - if (S9xSetSoundMode (channel, (gain & 0x20) ? - MODE_INCREASE_BENT_LINE : - MODE_INCREASE_LINEAR)) - { - S9xSetEnvelopeRate (channel, IncreaseRate [gain & 0x1f], 1, 127, (3<<28)|gain); - } - } - else - { - if(gain & 0x20) { - if (S9xSetSoundMode (channel, MODE_DECREASE_EXPONENTIAL)) - S9xSetEnvelopeRate (channel, DecreaseRateExp [gain & 0x1f] / 2, -1, 0, (4<<28)|gain); - } else { - if (S9xSetSoundMode (channel, MODE_DECREASE_LINEAR)) - S9xSetEnvelopeRate (channel, IncreaseRate [gain & 0x1f], -1, 0, (3<<28)|gain); - } - } - } - } -} - -void S9xSetAPUControl (uint8 byte) -{ -//if (byte & 0x40) -//printf ("*** Special SPC700 timing enabled\n"); - if ((byte & 1) != 0 && !APU.TimerEnabled [0]) - { - APU.Timer [0] = 0; - IAPU.RAM [0xfd] = 0; - if ((APU.TimerTarget [0] = IAPU.RAM [0xfa]) == 0) - APU.TimerTarget [0] = 0x100; - } - if ((byte & 2) != 0 && !APU.TimerEnabled [1]) - { - APU.Timer [1] = 0; - IAPU.RAM [0xfe] = 0; - if ((APU.TimerTarget [1] = IAPU.RAM [0xfb]) == 0) - APU.TimerTarget [1] = 0x100; - } - if ((byte & 4) != 0 && !APU.TimerEnabled [2]) - { - APU.Timer [2] = 0; - IAPU.RAM [0xff] = 0; - if ((APU.TimerTarget [2] = IAPU.RAM [0xfc]) == 0) - APU.TimerTarget [2] = 0x100; - } - APU.TimerEnabled [0] = byte & 1; - APU.TimerEnabled [1] = (byte & 2) >> 1; - APU.TimerEnabled [2] = (byte & 4) >> 2; - - if (byte & 0x10) - IAPU.RAM [0xF4] = IAPU.RAM [0xF5] = 0; - - if (byte & 0x20) - IAPU.RAM [0xF6] = IAPU.RAM [0xF7] = 0; - - if (byte & 0x80) - { - if (!APU.ShowROM) - { - memmove (&IAPU.RAM [0xffc0], APUROM, sizeof (APUROM)); - APU.ShowROM = TRUE; - } - } - else - { - if (APU.ShowROM) - { - APU.ShowROM = FALSE; - memmove (&IAPU.RAM [0xffc0], APU.ExtraRAM, sizeof (APUROM)); - } - } - IAPU.RAM [0xf1] = byte; -} - -void S9xSetAPUTimer (uint16 Address, uint8 byte) -{ - IAPU.RAM [Address] = byte; - - switch (Address) - { - case 0xfa: - if ((APU.TimerTarget [0] = IAPU.RAM [0xfa]) == 0) - APU.TimerTarget [0] = 0x100; - APU.TimerValueWritten [0] = TRUE; - break; - case 0xfb: - if ((APU.TimerTarget [1] = IAPU.RAM [0xfb]) == 0) - APU.TimerTarget [1] = 0x100; - APU.TimerValueWritten [1] = TRUE; - break; - case 0xfc: - if ((APU.TimerTarget [2] = IAPU.RAM [0xfc]) == 0) - APU.TimerTarget [2] = 0x100; - APU.TimerValueWritten [2] = TRUE; - break; - } -} - -uint8 S9xGetAPUDSP () -{ - uint8 reg = IAPU.RAM [0xf2] & 0x7f; - uint8 byte = APU.DSP [reg]; - - switch (reg) - { - case APU_KON: - break; - case APU_KOFF: - break; - case APU_OUTX + 0x00: - case APU_OUTX + 0x10: - case APU_OUTX + 0x20: - case APU_OUTX + 0x30: - case APU_OUTX + 0x40: - case APU_OUTX + 0x50: - case APU_OUTX + 0x60: - case APU_OUTX + 0x70: - if (SoundData.channels [reg >> 4].state == SOUND_SILENT) - return (0); - return ((SoundData.channels [reg >> 4].sample >> 8) | - (SoundData.channels [reg >> 4].sample & 0xff)); - - case APU_ENVX + 0x00: - case APU_ENVX + 0x10: - case APU_ENVX + 0x20: - case APU_ENVX + 0x30: - case APU_ENVX + 0x40: - case APU_ENVX + 0x50: - case APU_ENVX + 0x60: - case APU_ENVX + 0x70: - return 0; -// return ((uint8) S9xGetEnvelopeHeight (reg >> 4)); - - case APU_ENDX: -// To fix speech in Magical Drop 2 6/11/00 -// APU.DSP [APU_ENDX] = 0; - break; - default: - break; - } - return (byte); -} -- cgit v1.2.3