+++ /dev/null
-/*
- * 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.
- */
-#ifdef __DJGPP__
-//#include <allegro.h>
-#undef TRUE
-#endif
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#ifndef _SNESPPC
-#include <errno.h>
-#include <fcntl.h>
-#endif
-
-#define CLIP16(v) \
-if ((v) < -32768) \
- (v) = -32768; \
-else \
-if ((v) > 32767) \
- (v) = 32767
-
-#define CLIP16_latch(v,l) \
-if ((v) < -32768) \
-{ (v) = -32768; (l)++; }\
-else \
-if ((v) > 32767) \
-{ (v) = 32767; (l)++; }
-
-#define CLIP24(v) \
-if ((v) < -8388608) \
- (v) = -8388608; \
-else \
-if ((v) > 8388607) \
- (v) = 8388607
-
-#define CLIP8(v) \
-if ((v) < -128) \
- (v) = -128; \
-else \
-if ((v) > 127) \
- (v) = 127
-
-#include "snes9x.h"
-#include "soundux.h"
-#include "apu.h"
-#include "memmap.h"
-#include "cpuexec.h"
-
-
-extern int Echo [24000];
-extern int DummyEchoBuffer [SOUND_BUFFER_SIZE];
-extern int MixBuffer [SOUND_BUFFER_SIZE];
-extern int EchoBuffer [SOUND_BUFFER_SIZE];
-extern int FilterTaps [8];
-extern unsigned long Z;
-extern int Loop [16];
-
-extern long FilterValues[4][2];
-extern int NoiseFreq [32];
-
-#undef ABS
-#define ABS(a) ((a) < 0 ? -(a) : (a))
-
-#define FIXED_POINT 0x10000UL
-#define FIXED_POINT_REMAINDER 0xffffUL
-#define FIXED_POINT_SHIFT 16
-
-#define VOL_DIV8 0x8000
-#define VOL_DIV16 0x0080
-#define ENVX_SHIFT 24
-
-extern "C" void DecodeBlockAsm (int8 *, int16 *, int32 *, int32 *);
-extern "C" void DecodeBlockAsm2 (int8 *, int16 *, int32 *, int32 *);
-
-// F is channel's current frequency and M is the 16-bit modulation waveform
-// from the previous channel multiplied by the current envelope volume level.
-#define PITCH_MOD(F,M) ((F) * ((((unsigned long) (M)) + 0x800000) >> 16) >> 7)
-//#define PITCH_MOD(F,M) ((F) * ((((M) & 0x7fffff) >> 14) + 1) >> 8)
-
-#define LAST_SAMPLE 0xffffff
-#define JUST_PLAYED_LAST_SAMPLE(c) ((c)->sample_pointer >= LAST_SAMPLE)
-
-STATIC INLINE uint8 *S9xGetSampleAddress (int sample_number)
-{
- uint32 addr = (((APU.DSP[APU_DIR] << 8) + (sample_number << 2)) & 0xffff);
- return (IAPU.RAM + addr);
-}
-
-void S9xAPUSetEndOfSample (int i, Channel *ch)
-{
- ch->state = SOUND_SILENT;
- ch->mode = MODE_NONE;
- APU.DSP [APU_ENDX] |= 1 << i;
- APU.DSP [APU_KON] &= ~(1 << i);
- APU.DSP [APU_KOFF] &= ~(1 << i);
- APU.KeyedChannels &= ~(1 << i);
-}
-#ifdef __DJGPP
-END_OF_FUNCTION (S9xAPUSetEndOfSample)
-#endif
-
-void S9xAPUSetEndX (int ch)
-{
- APU.DSP [APU_ENDX] |= 1 << ch;
-}
-#ifdef __DJGPP
-END_OF_FUNCTION (S9xAPUSetEndX)
-#endif
-
-void S9xSetEnvRate (Channel *ch, unsigned long rate, int direction, int target)
-{
- ch->envx_target = target;
-
- if (rate == ~0UL)
- {
- ch->direction = 0;
- rate = 0;
- }
- else
- ch->direction = direction;
-
- static int steps [] =
- {
-// 0, 64, 1238, 1238, 256, 1, 64, 109, 64, 1238
- 0, 64, 619, 619, 128, 1, 64, 55, 64, 619
- };
-
- if (rate == 0 || so.playback_rate == 0)
- ch->erate = 0;
- else
- {
- ch->erate = (unsigned long)
- (((int64) FIXED_POINT * 1000 * steps [ch->state]) /
- (rate * so.playback_rate));
- }
-}
-
-#ifdef __DJGPP
-END_OF_FUNCTION(S9xSetEnvRate);
-#endif
-
-void S9xSetEnvelopeRate (int channel, unsigned long rate, int direction,
- int target)
-{
- S9xSetEnvRate (&SoundData.channels [channel], rate, direction, target);
-}
-
-#ifdef __DJGPP
-END_OF_FUNCTION(S9xSetEnvelopeRate);
-#endif
-
-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;
-}
-
-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 [Settings.ReverseStereo] = volume_left;
- SoundData.master_volume [1 ^ Settings.ReverseStereo] = volume_right;
- }
-}
-
-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 [Settings.ReverseStereo] = volume_left;
- SoundData.echo_volume [1 ^ Settings.ReverseStereo] = volume_right;
-}
-
-void S9xSetEchoEnable (uint8 byte)
-{
- SoundData.echo_channel_enable = byte;
- if (!SoundData.echo_write_enabled || Settings.DisableSoundEcho)
- byte = 0;
- if (byte && !SoundData.echo_enable)
- {
- memset (Echo, 0, sizeof (Echo));
- memset (Loop, 0, sizeof (Loop));
- }
-
- SoundData.echo_enable = byte;
- for (int i = 0; i < 8; i++)
- {
- if (byte & (1 << i))
- SoundData.channels [i].echo_buf_ptr = EchoBuffer;
- else
- SoundData.channels [i].echo_buf_ptr = DummyEchoBuffer;
- }
-}
-
-void S9xSetEchoFeedback (int feedback)
-{
- CLIP8(feedback);
- SoundData.echo_feedback = feedback;
-}
-
-void S9xSetEchoDelay (int delay)
-{
- SoundData.echo_buffer_size = (512 * delay * so.playback_rate) / 32000;
- if (so.stereo)
- SoundData.echo_buffer_size <<= 1;
- if (SoundData.echo_buffer_size)
- SoundData.echo_ptr %= SoundData.echo_buffer_size;
- else
- SoundData.echo_ptr = 0;
- S9xSetEchoEnable (APU.DSP [APU_EON]);
-}
-
-void S9xSetEchoWriteEnable (uint8 byte)
-{
- SoundData.echo_write_enabled = byte;
- S9xSetEchoDelay (APU.DSP [APU_EDL] & 15);
-}
-
-void S9xSetFrequencyModulationEnable (uint8 byte)
-{
- SoundData.pitch_mod = byte & ~1;
-}
-
-void S9xSetSoundKeyOff (int channel)
-{
- Channel *ch = &SoundData.channels[channel];
-
- if (ch->state != SOUND_SILENT)
- {
- ch->state = SOUND_RELEASE;
- ch->mode = MODE_RELEASE;
- S9xSetEnvRate (ch, 8, -1, 0);
- }
-}
-
-void S9xFixSoundAfterSnapshotLoad ()
-{
- SoundData.echo_write_enabled = !(APU.DSP [APU_FLG] & 0x20);
- SoundData.echo_channel_enable = APU.DSP [APU_EON];
- S9xSetEchoDelay (APU.DSP [APU_EDL] & 0xf);
- S9xSetEchoFeedback ((signed char) APU.DSP [APU_EFB]);
-
- S9xSetFilterCoefficient (0, (signed char) APU.DSP [APU_C0]);
- S9xSetFilterCoefficient (1, (signed char) APU.DSP [APU_C1]);
- S9xSetFilterCoefficient (2, (signed char) APU.DSP [APU_C2]);
- S9xSetFilterCoefficient (3, (signed char) APU.DSP [APU_C3]);
- S9xSetFilterCoefficient (4, (signed char) APU.DSP [APU_C4]);
- S9xSetFilterCoefficient (5, (signed char) APU.DSP [APU_C5]);
- S9xSetFilterCoefficient (6, (signed char) APU.DSP [APU_C6]);
- S9xSetFilterCoefficient (7, (signed char) APU.DSP [APU_C7]);
- for (int i = 0; i < 8; i++)
- {
- SoundData.channels[i].needs_decode = TRUE;
- S9xSetSoundFrequency (i, SoundData.channels[i].hertz);
- SoundData.channels [i].envxx = SoundData.channels [i].envx << ENVX_SHIFT;
- SoundData.channels [i].next_sample = 0;
- SoundData.channels [i].interpolate = 0;
- SoundData.channels [i].previous [0] = (int32) SoundData.channels [i].previous16 [0];
- SoundData.channels [i].previous [1] = (int32) SoundData.channels [i].previous16 [1];
- }
- SoundData.master_volume [Settings.ReverseStereo] = SoundData.master_volume_left;
- SoundData.master_volume [1 ^ Settings.ReverseStereo] = SoundData.master_volume_right;
- SoundData.echo_volume [Settings.ReverseStereo] = SoundData.echo_volume_left;
- SoundData.echo_volume [1 ^ Settings.ReverseStereo] = SoundData.echo_volume_right;
- IAPU.Scanline = 0;
-}
-
-void S9xSetFilterCoefficient (int tap, int value)
-{
- FilterTaps [tap & 7] = value;
- SoundData.no_filter = (FilterTaps [0] == 127 || FilterTaps [0] == 0) &&
- FilterTaps [1] == 0 &&
- FilterTaps [2] == 0 &&
- FilterTaps [3] == 0 &&
- FilterTaps [4] == 0 &&
- FilterTaps [5] == 0 &&
- FilterTaps [6] == 0 &&
- FilterTaps [7] == 0;
-}
-
-void S9xSetSoundADSR (int channel, int attack_rate, int decay_rate,
- int sustain_rate, int sustain_level, int release_rate)
-{
- 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);
- break;
-
- case SOUND_DECAY:
- S9xSetEnvelopeRate (channel, decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * (sustain_level + 1)) >> 3);
- break;
- case SOUND_SUSTAIN:
- S9xSetEnvelopeRate (channel, sustain_rate, -1, 0);
- break;
- }
-}
-
-void S9xSetEnvelopeHeight (int channel, int level)
-{
- Channel *ch = &SoundData.channels[channel];
-
- ch->envx = level;
- ch->envxx = level << ENVX_SHIFT;
-
- ch->left_vol_level = (level * ch->volume_left) / 128;
- ch->right_vol_level = (level * ch->volume_right) / 128;
-
- if (ch->envx == 0 && ch->state != SOUND_SILENT && ch->state != SOUND_GAIN)
- {
- S9xAPUSetEndOfSample (channel, ch);
- }
-}
-
-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);
-}
-
-#if 1
-void S9xSetSoundSample (int, uint16)
-{
-}
-#else
-void S9xSetSoundSample (int channel, uint16 sample_number)
-{
- register Channel *ch = &SoundData.channels[channel];
-
- if (ch->state != SOUND_SILENT &&
- sample_number != ch->sample_number)
- {
- int keep = ch->state;
- ch->state = SOUND_SILENT;
- ch->sample_number = sample_number;
- ch->loop = FALSE;
- ch->needs_decode = TRUE;
- ch->last_block = FALSE;
- ch->previous [0] = ch->previous[1] = 0;
- uint8 *dir = S9xGetSampleAddress (sample_number);
- ch->block_pointer = READ_WORD (dir);
- ch->sample_pointer = 0;
- ch->state = keep;
- }
-}
-#endif
-
-void S9xSetSoundFrequency (int channel, int hertz)
-{
- if (so.playback_rate)
- {
- if (SoundData.channels[channel].type == SOUND_NOISE)
- hertz = NoiseFreq [APU.DSP [APU_FLG] & 0x1f];
- SoundData.channels[channel].frequency = (int)
- (((int64) hertz * FIXED_POINT) / so.playback_rate);
- if (Settings.FixFrequency)
- {
- SoundData.channels[channel].frequency =
- (unsigned long) ((double) SoundData.channels[channel].frequency * 0.980);
- }
- }
-}
-
-void S9xSetSoundHertz (int channel, int hertz)
-{
- SoundData.channels[channel].hertz = hertz;
- S9xSetSoundFrequency (channel, hertz);
-}
-
-void S9xSetSoundType (int channel, int type_of_sound)
-{
- SoundData.channels[channel].type = type_of_sound;
-}
-
-bool8_32 S9xSetSoundMute (bool8_32 mute)
-{
- bool8_32 old = so.mute_sound;
- so.mute_sound = mute;
- return (old);
-}
-
-void AltDecodeBlock_PPC (Channel *ch, struct SIAPU * iapu)
-{
- if (ch->block_pointer >= 0x10000 - 9)
- {
- ch->last_block = TRUE;
- ch->loop = FALSE;
- ch->block = ch->decoded;
- memset ((void *) ch->decoded, 0, sizeof (int16) * 16);
- return;
- }
- signed char *compressed = (signed char *) &iapu->RAM [ch->block_pointer];
-
- unsigned char filter = *compressed;
- if ((ch->last_block = filter & 1))
- ch->loop = (filter & 2) != 0;
-
-#if (defined (__i386__) || defined (__i486__) ||\
- defined (__i586__) || defined (__WIN32__) || defined (__DJGPP))
- int16 *raw = ch->block = ch->decoded;
-
- if (Settings.AltSampleDecode == 1)
- DecodeBlockAsm (compressed, raw, &ch->previous [0], &ch->previous [1]);
- else
- DecodeBlockAsm2 (compressed, raw, &ch->previous [0], &ch->previous [1]);
-#else
- int32 out;
- unsigned char shift;
- signed char sample1, sample2;
- unsigned int i;
-
- compressed++;
- signed short *raw = ch->block = ch->decoded;
-
- int32 prev0 = ch->previous [0];
- int32 prev1 = ch->previous [1];
- shift = filter >> 4;
-
- switch ((filter >> 2) & 3)
- {
- case 0:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
- *raw++ = ((int32) sample1 << shift);
- *raw++ = ((int32) sample2 << shift);
- }
- prev1 = *(raw - 2);
- prev0 = *(raw - 1);
- break;
- case 1:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
- prev0 = (int16) prev0;
- *raw++ = prev1 = ((int32) sample1 << shift) + prev0 - (prev0 >> 4);
- prev1 = (int16) prev1;
- *raw++ = prev0 = ((int32) sample2 << shift) + prev1 - (prev1 >> 4);
- }
- break;
- case 2:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
-
- out = (sample1 << shift) - prev1 + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 5) -
- (prev0 >> 4);
-
- out = (sample2 << shift) - prev1 + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 5) -
- (prev0 >> 4);
- }
- break;
- case 3:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
- out = (sample1 << shift);
-
- out = out - prev1 + (prev1 >> 3) + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 3) -
- (prev0 >> 4) - (prev1 >> 6);
-
- out = (sample2 << shift);
- out = out - prev1 + (prev1 >> 3) + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 3) -
- (prev0 >> 4) - (prev1 >> 6);
- }
- break;
- }
- ch->previous [0] = prev0;
- ch->previous [1] = prev1;
-#endif
-
- ch->block_pointer += 9;
-}
-
-void AltDecodeBlock (Channel *ch, struct SIAPU * iapu)
-{
- if (ch->block_pointer >= 0x10000 - 9)
- {
- ch->last_block = TRUE;
- ch->loop = FALSE;
- ch->block = ch->decoded;
- memset ((void *) ch->decoded, 0, sizeof (int16) * 16);
- return;
- }
- signed char *compressed = (signed char *) &iapu->RAM [ch->block_pointer];
-
- unsigned char filter = *compressed;
- if ((ch->last_block = filter & 1))
- ch->loop = (filter & 2) != 0;
-
-#if (defined (__i386__) || defined (__i486__) ||\
- defined (__i586__) || defined (__WIN32__) || defined (__DJGPP))
- int16 *raw = ch->block = ch->decoded;
-
- if (Settings.AltSampleDecode == 1)
- DecodeBlockAsm (compressed, raw, &ch->previous [0], &ch->previous [1]);
- else
- DecodeBlockAsm2 (compressed, raw, &ch->previous [0], &ch->previous [1]);
-#else
- int32 out;
- unsigned char shift;
- signed char sample1, sample2;
- unsigned int i;
-
- compressed++;
- signed short *raw = ch->block = ch->decoded;
-
- int32 prev0 = ch->previous [0];
- int32 prev1 = ch->previous [1];
- shift = filter >> 4;
-
- switch ((filter >> 2) & 3)
- {
- case 0:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
- *raw++ = ((int32) sample1 << shift);
- *raw++ = ((int32) sample2 << shift);
- }
- prev1 = *(raw - 2);
- prev0 = *(raw - 1);
- break;
- case 1:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
- prev0 = (int16) prev0;
- *raw++ = prev1 = ((int32) sample1 << shift) + prev0 - (prev0 >> 4);
- prev1 = (int16) prev1;
- *raw++ = prev0 = ((int32) sample2 << shift) + prev1 - (prev1 >> 4);
- }
- break;
- case 2:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
-
- out = (sample1 << shift) - prev1 + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 5) -
- (prev0 >> 4);
-
- out = (sample2 << shift) - prev1 + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 5) -
- (prev0 >> 4);
- }
- break;
- case 3:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- sample2 >>= 4;
- sample1 >>= 4;
- out = (sample1 << shift);
-
- out = out - prev1 + (prev1 >> 3) + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 3) -
- (prev0 >> 4) - (prev1 >> 6);
-
- out = (sample2 << shift);
- out = out - prev1 + (prev1 >> 3) + (prev1 >> 4);
- prev1 = (int16) prev0;
- prev0 &= ~3;
- *raw++ = prev0 = out + (prev0 << 1) - (prev0 >> 3) -
- (prev0 >> 4) - (prev1 >> 6);
- }
- break;
- }
- ch->previous [0] = prev0;
- ch->previous [1] = prev1;
-#endif
-
- ch->block_pointer += 9;
-}
-
-void AltDecodeBlock2 (Channel *ch)
-{
- int32 out;
- unsigned char filter;
- unsigned char shift;
- signed char sample1, sample2;
- unsigned char i;
-
- if (ch->block_pointer > 0x10000 - 9)
- {
- ch->last_block = TRUE;
- ch->loop = FALSE;
- ch->block = ch->decoded;
- memset ((void *) ch->decoded, 0, sizeof (int16) * 16);
- return;
- }
-
- signed char *compressed = (signed char *) &IAPU.RAM [ch->block_pointer];
-
- filter = *compressed;
- if ((ch->last_block = filter & 1))
- ch->loop = (filter & 2) != 0;
-
- compressed++;
- signed short *raw = ch->block = ch->decoded;
-
- shift = filter >> 4;
- int32 prev0 = ch->previous [0];
- int32 prev1 = ch->previous [1];
-
- if(shift > 12)
- shift -= 4;
-
- switch ((filter >> 2) & 3)
- {
- case 0:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
- sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
- sample1 >>= 4;
-
- out = (int32)(sample1 << shift);
-
- prev1 = prev0;
- prev0 = out;
- CLIP16(out);
- *raw++ = (int16)out;
-
- out = (int32)(sample2 << shift);
-
- prev1 = prev0;
- prev0 = out;
- CLIP16(out);
- *raw++ = (int16)out;
- }
- break;
- case 1:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
- sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
- sample1 >>= 4;
- out = (int32)(sample1 << shift);
- out += (int32)((double)prev0 * 15/16);
-
- prev1 = prev0;
- prev0 = out;
- CLIP16(out);
- *raw++ = (int16)out;
-
- out = (int32)(sample2 << shift);
- out += (int32)((double)prev0 * 15/16);
-
- prev1 = prev0;
- prev0 = out;
- CLIP16(out);
- *raw++ = (int16)out;
- }
- break;
- case 2:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
- sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
- sample1 >>= 4;
-
- out = ((sample1 << shift) * 256 + (prev0 & ~0x2) * 488 - prev1 * 240) >> 8;
-
- prev1 = prev0;
- prev0 = (int16)out;
- *raw++ = (int16)out;
-
- out = ((sample2 << shift) * 256 + (prev0 & ~0x2) * 488 - prev1 * 240) >> 8;
-
- prev1 = prev0;
- prev0 = (int16)out;
- *raw++ = (int16)out;
- }
- break;
-
- case 3:
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
- sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
- sample1 >>= 4;
- out = (int32)(sample1 << shift);
- out += (int32)((double)prev0 * 115/64 - (double)prev1 * 13/16);
-
- prev1 = prev0;
- prev0 = out;
-
- CLIP16(out);
- *raw++ = (int16)out;
-
- out = (int32)(sample2 << shift);
- out += (int32)((double)prev0 * 115/64 - (double)prev1 * 13/16);
-
- prev1 = prev0;
- prev0 = out;
-
- CLIP16(out);
- *raw++ = (int16)out;
- }
- break;
- }
- ch->previous [0] = prev0;
- ch->previous [1] = prev1;
- ch->block_pointer += 9;
-}
-
-void DecodeBlock (Channel *ch)
-{
- int32 out;
- unsigned char filter;
- unsigned char shift;
- signed char sample1, sample2;
- unsigned char i;
-
- if (Settings.AltSampleDecode)
- {
- if (Settings.AltSampleDecode < 3)
- AltDecodeBlock (ch, &IAPU);
- else
- AltDecodeBlock2 (ch);
- return;
- }
- if (ch->block_pointer > 0x10000 - 9)
- {
- ch->last_block = TRUE;
- ch->loop = FALSE;
- ch->block = ch->decoded;
- return;
- }
- signed char *compressed = (signed char *) &IAPU.RAM [ch->block_pointer];
-
- filter = *compressed;
- if ((ch->last_block = filter & 1))
- ch->loop = (filter & 2) != 0;
-
- // If enabled, results in 'tick' sound on some samples that repeat by
- // re-using part of the original sample but generate a slightly different
- // waveform.
- if (!Settings.DisableSampleCaching &&
- memcmp ((uint8 *) compressed, &IAPU.ShadowRAM [ch->block_pointer], 9) == 0)
- {
- ch->block = (signed short *) (IAPU.CachedSamples + (ch->block_pointer << 2));
- ch->previous [0] = ch->block [15];
- ch->previous [1] = ch->block [14];
- }
- else
- {
- if (!Settings.DisableSampleCaching)
- memcpy (&IAPU.ShadowRAM [ch->block_pointer], (uint8 *) compressed, 9);
- compressed++;
- signed short *raw = ch->block = ch->decoded;
-
- shift = filter >> 4;
- filter = ((filter >> 2) & 3);
- int32 prev0 = ch->previous [0];
- int32 prev1 = ch->previous [1];
- int32 f0 = FilterValues[filter][0];
- int32 f1 = FilterValues[filter][1];
-
- for (i = 8; i != 0; i--)
- {
- sample1 = *compressed++;
- sample2 = sample1 << 4;
- //Sample 2 = Bottom Nibble, Sign Extended.
- sample2 >>= 4;
- //Sample 1 = Top Nibble, shifted down and Sign Extended.
- sample1 >>= 4;
- out = (sample1 << shift);
- out += (prev0 * f0 + prev1 * f1) / 256;
-
- CLIP16 (out);
- prev1 = prev0;
- prev0 = out;
- *raw++ = (signed short) out;
-
- out = (sample2 << shift);
- out += (prev0 * f0 + prev1 * f1) / 256;
-
- CLIP16 (out);
- prev1 = prev0;
- prev0 = out;
- *raw++ = (signed short) out;
- }
- ch->previous [0] = prev0;
- ch->previous [1] = prev1;
-
- if (!Settings.DisableSampleCaching)
- {
- memcpy (IAPU.CachedSamples + (ch->block_pointer << 2),
- (uint8 *) ch->decoded, 32);
- }
- }
- ch->block_pointer += 9;
-}
-
-void MixStereo (int sample_count)
-{
- struct SIAPU * iapu = &IAPU;
-#if defined(TARGET_OS_MAC) && TARGET_OS_MAC
- static int wave[SOUND_BUFFER_SIZE];
-#else
- int wave[SOUND_BUFFER_SIZE];
-#endif
- int pitch_mod = SoundData.pitch_mod & ~APU.DSP[APU_NON];
-
- for (uint32 J = 0; J < NUM_CHANNELS; J++)
- {
- int32 VL, VR;
- Channel *ch = &SoundData.channels[J];
- unsigned long freq0 = ch->frequency;
-
- if (ch->state == SOUND_SILENT || !(so.sound_switch & (1 << J)))
- continue;
-
-// freq0 = (unsigned long) ((double) freq0 * 0.985);
-
- bool8_32 mod = pitch_mod & (1 << J);
-
- if (ch->needs_decode)
- {
- AltDecodeBlock(ch, iapu);
- //DecodeBlock(ch);
- ch->needs_decode = FALSE;
- ch->sample = ch->block[0];
- ch->sample_pointer = freq0 >> FIXED_POINT_SHIFT;
- if (ch->sample_pointer == 0)
- ch->sample_pointer = 1;
- if (ch->sample_pointer > SOUND_DECODE_LENGTH)
- ch->sample_pointer = SOUND_DECODE_LENGTH - 1;
-
- ch->next_sample = ch->block[ch->sample_pointer];
- ch->interpolate = 0;
-
- if (Settings.InterpolatedSound && freq0 < FIXED_POINT && !mod)
- ch->interpolate = ((ch->next_sample - ch->sample) *
- (long) freq0) / (long) FIXED_POINT;
- }
- VL = (ch->sample * ch-> left_vol_level) / 128;
- VR = (ch->sample * ch->right_vol_level) / 128;
-
- for (uint32 I = 0; I < (uint32) sample_count; I += 2)
- {
- unsigned long freq = freq0;
-
- if (mod)
- freq = PITCH_MOD(freq, wave [I / 2]);
-
- ch->env_error += ch->erate;
- if (ch->env_error >= FIXED_POINT)
- {
- uint32 step = ch->env_error >> FIXED_POINT_SHIFT;
-
- switch (ch->state)
- {
- case SOUND_ATTACK:
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
-
- if (ch->envx >= 126)
- {
- ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
- ch->state = SOUND_DECAY;
- if (ch->sustain_level != 8)
- {
- S9xSetEnvRate (ch, ch->decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * ch->sustain_level)
- >> 3);
- break;
- }
- ch->state = SOUND_SUSTAIN;
- S9xSetEnvRate (ch, ch->sustain_rate, -1, 0);
- }
- break;
-
- case SOUND_DECAY:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx = (ch->envxx >> 8) * 255;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= ch->envx_target)
- {
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto stereo_exit;
- }
- ch->state = SOUND_SUSTAIN;
- S9xSetEnvRate (ch, ch->sustain_rate, -1, 0);
- }
- break;
-
- case SOUND_SUSTAIN:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx = (ch->envxx >> 8) * 255;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto stereo_exit;
- }
- break;
-
- case SOUND_RELEASE:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx -= (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto stereo_exit;
- }
- break;
-
- case SOUND_INCREASE_LINEAR:
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
-
- if (ch->envx >= 126)
- {
- ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
- ch->state = SOUND_GAIN;
- ch->mode = MODE_GAIN;
- S9xSetEnvRate (ch, 0, -1, 0);
- }
- break;
-
- case SOUND_INCREASE_BENT_LINE:
- if (ch->envx >= (MAX_ENVELOPE_HEIGHT * 3) / 4)
- {
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx += (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- }
- else
- {
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
- }
-
- if (ch->envx >= 126)
- {
- ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
- ch->state = SOUND_GAIN;
- ch->mode = MODE_GAIN;
- S9xSetEnvRate (ch, 0, -1, 0);
- }
- break;
-
- case SOUND_DECREASE_LINEAR:
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx -= step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto stereo_exit;
- }
- break;
-
- case SOUND_DECREASE_EXPONENTIAL:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx = (ch->envxx >> 8) * 255;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto stereo_exit;
- }
- break;
-
- case SOUND_GAIN:
- S9xSetEnvRate (ch, 0, -1, 0);
- break;
- }
- ch-> left_vol_level = (ch->envx * ch->volume_left) / 128;
- ch->right_vol_level = (ch->envx * ch->volume_right) / 128;
- VL = (ch->sample * ch-> left_vol_level) / 128;
- VR = (ch->sample * ch->right_vol_level) / 128;
- }
-
- ch->count += freq;
- if (ch->count >= FIXED_POINT)
- {
- VL = ch->count >> FIXED_POINT_SHIFT;
- ch->sample_pointer += VL;
- ch->count &= FIXED_POINT_REMAINDER;
-
- ch->sample = ch->next_sample;
- if (ch->sample_pointer >= SOUND_DECODE_LENGTH)
- {
- if (JUST_PLAYED_LAST_SAMPLE(ch))
- {
- S9xAPUSetEndOfSample (J, ch);
- goto stereo_exit;
- }
- do
- {
- ch->sample_pointer -= SOUND_DECODE_LENGTH;
- if (ch->last_block)
- {
- if (!ch->loop)
- {
- ch->sample_pointer = LAST_SAMPLE;
- ch->next_sample = ch->sample;
- break;
- }
- else
- {
- S9xAPUSetEndX (J);
- ch->last_block = FALSE;
- uint8 *dir = S9xGetSampleAddress (ch->sample_number);
- ch->block_pointer = READ_WORD(dir + 2);
- }
- }
- AltDecodeBlock(ch, iapu);
- //DecodeBlock (ch);
- } while (ch->sample_pointer >= SOUND_DECODE_LENGTH);
- if (!JUST_PLAYED_LAST_SAMPLE (ch))
- ch->next_sample = ch->block [ch->sample_pointer];
- }
- else
- ch->next_sample = ch->block [ch->sample_pointer];
-
- if (ch->type == SOUND_SAMPLE)
- {
- if (Settings.InterpolatedSound && freq < FIXED_POINT && !mod)
- {
- ch->interpolate = ((ch->next_sample - ch->sample) *
- (long) freq) / (long) FIXED_POINT;
- ch->sample = (int16) (ch->sample + (((ch->next_sample - ch->sample) *
- (long) (ch->count)) / (long) FIXED_POINT));
- }
- else
- ch->interpolate = 0;
- }
- else
- {
- for (;VL > 0; VL--)
- if ((so.noise_gen <<= 1) & 0x80000000L)
- so.noise_gen ^= 0x0040001L;
- ch->sample = (so.noise_gen << 17) >> 17;
- ch->interpolate = 0;
- }
-
- VL = (ch->sample * ch-> left_vol_level) / 128;
- VR = (ch->sample * ch->right_vol_level) / 128;
- }
- else
- {
- if (ch->interpolate)
- {
- int32 s = (int32) ch->sample + ch->interpolate;
-
- CLIP16(s);
- ch->sample = (int16) s;
- VL = (ch->sample * ch-> left_vol_level) / 128;
- VR = (ch->sample * ch->right_vol_level) / 128;
- }
- }
-
- if (pitch_mod & (1 << (J + 1)))
- wave [I / 2] = ch->sample * ch->envx;
-
- MixBuffer [I ^ Settings.ReverseStereo] += VL;
- MixBuffer [I + (1 ^ Settings.ReverseStereo)] += VR;
- ch->echo_buf_ptr [I ^ Settings.ReverseStereo] += VL;
- ch->echo_buf_ptr [I + (1 ^ Settings.ReverseStereo)] += VR;
- }
-stereo_exit: ;
- }
-}
-
-#ifdef __DJGPP
-END_OF_FUNCTION(MixStereo);
-#endif
-
-void MixMono (int sample_count)
-{
- struct SIAPU * iapu = &IAPU;
-#if defined(TARGET_OS_MAC) && TARGET_OS_MAC
- static int wave[SOUND_BUFFER_SIZE];
-#else
-#ifdef _SNESPPC
- static int wave[SOUND_BUFFER_SIZE];
-#else
- int wave[SOUND_BUFFER_SIZE];
-#endif
-#endif
- int pitch_mod = SoundData.pitch_mod & (~APU.DSP[APU_NON]);
-
- for (uint32 J = 0; J < NUM_CHANNELS; J++)
- {
- Channel *ch = &SoundData.channels[J];
- unsigned long freq0 = ch->frequency;
-
- if (ch->state == SOUND_SILENT || !(so.sound_switch & (1 << J)))
- continue;
-
-// freq0 = (unsigned long) ((double) freq0 * 0.985);
-
- bool8_32 mod = pitch_mod & (1 << J);
-
- if (ch->needs_decode)
- {
- AltDecodeBlock(ch, iapu);
- //DecodeBlock(ch);
- ch->needs_decode = FALSE;
- ch->sample = ch->block[0];
- ch->sample_pointer = freq0 >> FIXED_POINT_SHIFT;
- if (ch->sample_pointer == 0)
- ch->sample_pointer = 1;
- if (ch->sample_pointer > SOUND_DECODE_LENGTH)
- ch->sample_pointer = SOUND_DECODE_LENGTH - 1;
- ch->next_sample = ch->block[ch->sample_pointer];
- ch->interpolate = 0;
-
- if (Settings.InterpolatedSound && freq0 < FIXED_POINT && !mod)
- ch->interpolate = ((ch->next_sample - ch->sample) *
- (long) freq0) / (long) FIXED_POINT;
- }
- int32 V = (ch->sample * ch->left_vol_level) / 128;
-
- for (uint32 I = 0; I < (uint32) sample_count; I++)
- {
- unsigned long freq = freq0;
-
- if (mod)
- freq = PITCH_MOD(freq, wave [I]);
-
- ch->env_error += ch->erate;
- if (ch->env_error >= FIXED_POINT)
- {
- uint32 step = ch->env_error >> FIXED_POINT_SHIFT;
-
- switch (ch->state)
- {
- case SOUND_ATTACK:
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
-
- if (ch->envx >= 126)
- {
- ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
- ch->state = SOUND_DECAY;
- if (ch->sustain_level != 8)
- {
- S9xSetEnvRate (ch, ch->decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * ch->sustain_level)
- >> 3);
- break;
- }
- ch->state = SOUND_SUSTAIN;
- S9xSetEnvRate (ch, ch->sustain_rate, -1, 0);
- }
- break;
-
- case SOUND_DECAY:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx = (ch->envxx >> 8) * 255;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= ch->envx_target)
- {
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto mono_exit;
- }
- ch->state = SOUND_SUSTAIN;
- S9xSetEnvRate (ch, ch->sustain_rate, -1, 0);
- }
- break;
-
- case SOUND_SUSTAIN:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx = (ch->envxx >> 8) * 255;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto mono_exit;
- }
- break;
-
- case SOUND_RELEASE:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx -= (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto mono_exit;
- }
- break;
-
- case SOUND_INCREASE_LINEAR:
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
-
- if (ch->envx >= 126)
- {
- ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
- ch->state = SOUND_GAIN;
- ch->mode = MODE_GAIN;
- S9xSetEnvRate (ch, 0, -1, 0);
- }
- break;
-
- case SOUND_INCREASE_BENT_LINE:
- if (ch->envx >= (MAX_ENVELOPE_HEIGHT * 3) / 4)
- {
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx += (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- }
- else
- {
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
- }
-
- if (ch->envx >= 126)
- {
- ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
- ch->state = SOUND_GAIN;
- ch->mode = MODE_GAIN;
- S9xSetEnvRate (ch, 0, -1, 0);
- }
- break;
-
- case SOUND_DECREASE_LINEAR:
- ch->env_error &= FIXED_POINT_REMAINDER;
- ch->envx -= step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto mono_exit;
- }
- break;
-
- case SOUND_DECREASE_EXPONENTIAL:
- while (ch->env_error >= FIXED_POINT)
- {
- ch->envxx = (ch->envxx >> 8) * 255;
- ch->env_error -= FIXED_POINT;
- }
- ch->envx = ch->envxx >> ENVX_SHIFT;
- if (ch->envx <= 0)
- {
- S9xAPUSetEndOfSample (J, ch);
- goto mono_exit;
- }
- break;
-
- case SOUND_GAIN:
- S9xSetEnvRate (ch, 0, -1, 0);
- break;
- }
- ch->left_vol_level = (ch->envx * ch->volume_left) / 128;
- V = (ch->sample * ch->left_vol_level) / 128;
- }
-
- ch->count += freq;
- if (ch->count >= FIXED_POINT)
- {
- V = ch->count >> FIXED_POINT_SHIFT;
- ch->sample_pointer += V;
- ch->count &= FIXED_POINT_REMAINDER;
-
- ch->sample = ch->next_sample;
- if (ch->sample_pointer >= SOUND_DECODE_LENGTH)
- {
- if (JUST_PLAYED_LAST_SAMPLE(ch))
- {
- S9xAPUSetEndOfSample (J, ch);
- goto mono_exit;
- }
- do
- {
- ch->sample_pointer -= SOUND_DECODE_LENGTH;
- if (ch->last_block)
- {
- if (!ch->loop)
- {
- ch->sample_pointer = LAST_SAMPLE;
- ch->next_sample = ch->sample;
- break;
- }
- else
- {
- ch->last_block = FALSE;
- uint8 *dir = S9xGetSampleAddress (ch->sample_number);
- ch->block_pointer = READ_WORD(dir + 2);
- S9xAPUSetEndX (J);
- }
- }
- AltDecodeBlock(ch, iapu);
- //DecodeBlock (ch);
- } while (ch->sample_pointer >= SOUND_DECODE_LENGTH);
- if (!JUST_PLAYED_LAST_SAMPLE (ch))
- ch->next_sample = ch->block [ch->sample_pointer];
- }
- else
- ch->next_sample = ch->block [ch->sample_pointer];
-
- if (ch->type == SOUND_SAMPLE)
- {
- if (Settings.InterpolatedSound && freq < FIXED_POINT && !mod)
- {
- ch->interpolate = ((ch->next_sample - ch->sample) *
- (long) freq) / (long) FIXED_POINT;
- ch->sample = (int16) (ch->sample + (((ch->next_sample - ch->sample) *
- (long) (ch->count)) / (long) FIXED_POINT));
- }
- else
- ch->interpolate = 0;
- }
- else
- {
- for (;V > 0; V--)
- if ((so.noise_gen <<= 1) & 0x80000000L)
- so.noise_gen ^= 0x0040001L;
- ch->sample = (so.noise_gen << 17) >> 17;
- ch->interpolate = 0;
- }
- V = (ch->sample * ch-> left_vol_level) / 128;
- }
- else
- {
- if (ch->interpolate)
- {
- int32 s = (int32) ch->sample + ch->interpolate;
-
- CLIP16(s);
- ch->sample = (int16) s;
- V = (ch->sample * ch-> left_vol_level) / 128;
- }
- }
-
- MixBuffer [I] += V;
- ch->echo_buf_ptr [I] += V;
-
- if (pitch_mod & (1 << (J + 1)))
- wave [I] = ch->sample * ch->envx;
- }
-mono_exit: ;
- }
-}
-#ifdef __DJGPP
-END_OF_FUNCTION(MixMono);
-#endif
-
-#ifdef __sun
-extern uint8 int2ulaw (int);
-#endif
-
-// For backwards compatibility with older port specific code
-void S9xMixSamples (uint8 *buffer, int sample_count)
-{
- S9xMixSamplesO (buffer, sample_count, 0);
-}
-#ifdef __DJGPP
-END_OF_FUNCTION(S9xMixSamples);
-#endif
-
-void S9xMixSamplesO (uint8 *buffer, int sample_count, int byte_offset)
-{
- int J;
- int I;
-
- if (!so.mute_sound)
- {
- memset (MixBuffer, 0, sample_count * sizeof (MixBuffer [0]));
- if (SoundData.echo_enable)
- memset (EchoBuffer, 0, sample_count * sizeof (EchoBuffer [0]));
-
- if (so.stereo)
- MixStereo (sample_count);
- else
- MixMono (sample_count);
- }
-
- /* Mix and convert waveforms */
- if (so.sixteen_bit)
- {
- int byte_count = sample_count << 1;
-
- // 16-bit sound
- if (so.mute_sound)
- {
- memset (buffer + byte_offset, 0, byte_count);
- }
- else
- {
- int O = byte_offset >> 1;
- if (SoundData.echo_enable && SoundData.echo_buffer_size)
- {
- if (so.stereo)
- {
- // 16-bit stereo sound with echo enabled ...
- if (SoundData.no_filter)
- {
- // ... but no filter defined.
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 + EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] * SoundData.master_volume [J & 1] + E * SoundData.echo_volume [J & 1]) / VOL_DIV16;
-
- CLIP16(I);
- ((signed short *) buffer)[J + O] = I;
- }
- }
- else
- {
- // ... with filter defined.
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Loop [(Z - 0) & 15] = E;
- E = E * FilterTaps [0];
- E += Loop [(Z - 2) & 15] * FilterTaps [1];
- E += Loop [(Z - 4) & 15] * FilterTaps [2];
- E += Loop [(Z - 6) & 15] * FilterTaps [3];
- E += Loop [(Z - 8) & 15] * FilterTaps [4];
- E += Loop [(Z - 10) & 15] * FilterTaps [5];
- E += Loop [(Z - 12) & 15] * FilterTaps [6];
- E += Loop [(Z - 14) & 15] * FilterTaps [7];
- E /= 128;
- Z++;
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1] +
- E * SoundData.echo_volume [J & 1]) / VOL_DIV16;
-
- CLIP16(I);
- ((signed short *) buffer)[J + O] = I;
- }
- }
- }
- else
- {
- // 16-bit mono sound with echo enabled...
- if (SoundData.no_filter)
- {
- // ... no filter defined
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] *
- SoundData.master_volume [0] +
- E * SoundData.echo_volume [0]) / VOL_DIV16;
- CLIP16(I);
- ((signed short *) buffer)[J + O] = I;
- }
- }
- else
- {
- // ... with filter defined
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Loop [(Z - 0) & 7] = E;
- E = E * FilterTaps [0];
- E += Loop [(Z - 1) & 7] * FilterTaps [1];
- E += Loop [(Z - 2) & 7] * FilterTaps [2];
- E += Loop [(Z - 3) & 7] * FilterTaps [3];
- E += Loop [(Z - 4) & 7] * FilterTaps [4];
- E += Loop [(Z - 5) & 7] * FilterTaps [5];
- E += Loop [(Z - 6) & 7] * FilterTaps [6];
- E += Loop [(Z - 7) & 7] * FilterTaps [7];
- E /= 128;
- Z++;
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] * SoundData.master_volume [0] +
- E * SoundData.echo_volume [0]) / VOL_DIV16;
- CLIP16(I);
- ((signed short *) buffer)[J + O] = I;
- }
- }
- }
- }
- else
- {
- // 16-bit mono or stereo sound, no echo
- for (J = 0; J < sample_count; J++)
- {
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1]) / VOL_DIV16;
-
- CLIP16(I);
- ((signed short *) buffer)[J + O] = I;
- }
- }
- }
- }
- else
- {
- int O = byte_offset;
-
- // 8-bit sound
- if (so.mute_sound)
- {
- memset (buffer + O, 128, sample_count);
- }
- else
-#ifdef __sun
- if (so.encoded)
- {
- for (J = 0; J < sample_count; J++)
- {
- I = (MixBuffer [J] * SoundData.master_volume_left) / VOL_DIV16;
- CLIP16(I);
- buffer[J + O] = int2ulaw (I);
- }
- }
- else
-#endif
- {
- if (SoundData.echo_enable && SoundData.echo_buffer_size)
- {
- if (so.stereo)
- {
- // 8-bit stereo sound with echo enabled...
- if (SoundData.no_filter)
- {
- // ... but no filter
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1] +
- E * SoundData.echo_volume [J & 1]) / VOL_DIV8;
- CLIP8(I);
- buffer [J + O] = I + 128;
- }
- }
- else
- {
- // ... with filter
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Loop [(Z - 0) & 15] = E;
- E = E * FilterTaps [0];
- E += Loop [(Z - 2) & 15] * FilterTaps [1];
- E += Loop [(Z - 4) & 15] * FilterTaps [2];
- E += Loop [(Z - 6) & 15] * FilterTaps [3];
- E += Loop [(Z - 8) & 15] * FilterTaps [4];
- E += Loop [(Z - 10) & 15] * FilterTaps [5];
- E += Loop [(Z - 12) & 15] * FilterTaps [6];
- E += Loop [(Z - 14) & 15] * FilterTaps [7];
- E /= 128;
- Z++;
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1] +
- E * SoundData.echo_volume [J & 1]) / VOL_DIV8;
- CLIP8(I);
- buffer [J + O] = I + 128;
- }
- }
- }
- else
- {
- // 8-bit mono sound with echo enabled...
- if (SoundData.no_filter)
- {
- // ... but no filter.
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] * SoundData.master_volume [0] +
- E * SoundData.echo_volume [0]) / VOL_DIV8;
- CLIP8(I);
- buffer [J + O] = I + 128;
- }
- }
- else
- {
- // ... with filter.
- for (J = 0; J < sample_count; J++)
- {
- int E = Echo [SoundData.echo_ptr];
-
- Loop [(Z - 0) & 7] = E;
- E = E * FilterTaps [0];
- E += Loop [(Z - 1) & 7] * FilterTaps [1];
- E += Loop [(Z - 2) & 7] * FilterTaps [2];
- E += Loop [(Z - 3) & 7] * FilterTaps [3];
- E += Loop [(Z - 4) & 7] * FilterTaps [4];
- E += Loop [(Z - 5) & 7] * FilterTaps [5];
- E += Loop [(Z - 6) & 7] * FilterTaps [6];
- E += Loop [(Z - 7) & 7] * FilterTaps [7];
- E /= 128;
- Z++;
-
- Echo [SoundData.echo_ptr] = (E * SoundData.echo_feedback) / 128 +
- EchoBuffer [J];
-
- if ((SoundData.echo_ptr += 1) >= SoundData.echo_buffer_size)
- SoundData.echo_ptr = 0;
-
- I = (MixBuffer [J] * SoundData.master_volume [0] +
- E * SoundData.echo_volume [0]) / VOL_DIV8;
- CLIP8(I);
- buffer [J + O] = I + 128;
- }
- }
- }
- }
- else
- {
- // 8-bit mono or stereo sound, no echo
- for (J = 0; J < sample_count; J++)
- {
- I = (MixBuffer [J] *
- SoundData.master_volume [J & 1]) / VOL_DIV8;
- CLIP8(I);
- buffer [J + O] = I + 128;
- }
- }
- }
- }
-}
-
-#ifdef __DJGPP
-END_OF_FUNCTION(S9xMixSamplesO);
-#endif
-
-void S9xResetSound (bool8_32 full)
-{
- for (int i = 0; i < 8; i++)
- {
- SoundData.channels[i].state = SOUND_SILENT;
- SoundData.channels[i].mode = MODE_NONE;
- SoundData.channels[i].type = SOUND_SAMPLE;
- SoundData.channels[i].volume_left = 0;
- SoundData.channels[i].volume_right = 0;
- SoundData.channels[i].hertz = 0;
- SoundData.channels[i].count = 0;
- SoundData.channels[i].loop = FALSE;
- SoundData.channels[i].envx_target = 0;
- SoundData.channels[i].env_error = 0;
- SoundData.channels[i].erate = 0;
- SoundData.channels[i].envx = 0;
- SoundData.channels[i].envxx = 0;
- SoundData.channels[i].left_vol_level = 0;
- SoundData.channels[i].right_vol_level = 0;
- SoundData.channels[i].direction = 0;
- SoundData.channels[i].attack_rate = 0;
- SoundData.channels[i].decay_rate = 0;
- SoundData.channels[i].sustain_rate = 0;
- SoundData.channels[i].release_rate = 0;
- SoundData.channels[i].sustain_level = 0;
- SoundData.echo_ptr = 0;
- SoundData.echo_feedback = 0;
- SoundData.echo_buffer_size = 1;
- }
- FilterTaps [0] = 127;
- FilterTaps [1] = 0;
- FilterTaps [2] = 0;
- FilterTaps [3] = 0;
- FilterTaps [4] = 0;
- FilterTaps [5] = 0;
- FilterTaps [6] = 0;
- FilterTaps [7] = 0;
- so.mute_sound = TRUE;
- so.noise_gen = 1;
- so.sound_switch = 255;
- so.samples_mixed_so_far = 0;
- so.play_position = 0;
- so.err_counter = 0;
-
- if (full)
- {
- SoundData.master_volume_left = 0;
- SoundData.master_volume_right = 0;
- SoundData.echo_volume_left = 0;
- SoundData.echo_volume_right = 0;
- SoundData.echo_enable = 0;
- SoundData.echo_write_enabled = 0;
- SoundData.echo_channel_enable = 0;
- SoundData.pitch_mod = 0;
- SoundData.dummy[0] = 0;
- SoundData.dummy[1] = 0;
- SoundData.dummy[2] = 0;
- SoundData.master_volume[0] = 0;
- SoundData.master_volume[1] = 0;
- SoundData.echo_volume[0] = 0;
- SoundData.echo_volume[1] = 0;
- SoundData.noise_hertz = 0;
- }
-
- SoundData.master_volume_left = 127;
- SoundData.master_volume_right = 127;
- SoundData.master_volume [0] = SoundData.master_volume [1] = 127;
- if (so.playback_rate)
- so.err_rate = (uint32) (FIXED_POINT * SNES_SCANLINE_TIME / (1.0 / so.playback_rate));
- else
- so.err_rate = 0;
- SoundData.no_filter = TRUE;
-}
-
-void S9xSetPlaybackRate (uint32 playback_rate)
-{
- so.playback_rate = playback_rate;
- so.err_rate = (uint32) (SNES_SCANLINE_TIME * FIXED_POINT / (1.0 / (double) so.playback_rate));
- S9xSetEchoDelay (APU.DSP [APU_EDL] & 0xf);
- for (int i = 0; i < 8; i++)
- S9xSetSoundFrequency (i, SoundData.channels [i].hertz);
-}
-
-bool8_32 S9xInitSound (int mode, bool8_32 stereo, int buffer_size)
-{
- so.sound_fd = -1;
- so.sound_switch = 255;
-
- so.playback_rate = mode;
- so.buffer_size = buffer_size;
- so.stereo = false;//stereo;
- so.sixteen_bit = Settings.SixteenBitSound;
- so.encoded = FALSE;
-
- S9xResetSound (TRUE);
-
- //if (!(mode & 7))
- //return (1);
-
- S9xSetSoundMute (TRUE);
- if (!S9xOpenSoundDevice (mode, stereo, buffer_size))
- {
- S9xMessage (S9X_ERROR, S9X_SOUND_DEVICE_OPEN_FAILED,
- "Sound device open failed");
- return (0);
- }
-
- return (1);
-}
-
-bool8_32 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);
-}
-
-void S9xSetSoundControl (int sound_switch)
-{
- so.sound_switch = sound_switch;
-}
-
-void S9xPlaySample (int channel)
-{
- Channel *ch = &SoundData.channels[channel];
-
- ch->state = SOUND_SILENT;
- ch->mode = MODE_NONE;
- ch->envx = 0;
- ch->envxx = 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;
- uint8 *dir = S9xGetSampleAddress (ch->sample_number);
- ch->block_pointer = READ_WORD (dir);
- ch->sample_pointer = 0;
- ch->env_error = 0;
- ch->next_sample = 0;
- ch->interpolate = 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);
- }
- else
- {
- ch->state = SOUND_DECAY;
- ch->envx = MAX_ENVELOPE_HEIGHT;
- S9xSetEnvRate (ch, ch->decay_rate, -1,
- (MAX_ENVELOPE_HEIGHT * ch->sustain_level) >> 3);
- }
- 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);
- }
- 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)]);
-}
projects / drnoksnes / commitdiff