start moving everything to C

1 files changed, 0 insertions, 1714 deletions

diff --git a/source/soundux.cpp b/source/soundux.cpp
deleted file mode 100644
index 10e0130..0000000
--- a/source/soundux.cpp
+++ /dev/null
@@ -1,1714 +0,0 @@
-/*******************************************************************************
-  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
- 
-  (c) Copyright 1996 - 2002 Gary Henderson (gary.henderson@ntlworld.com) and
-                            Jerremy Koot (jkoot@snes9x.com)
-
-  (c) Copyright 2001 - 2004 John Weidman (jweidman@slip.net)
-
-  (c) Copyright 2002 - 2004 Brad Jorsch (anomie@users.sourceforge.net),
-                            funkyass (funkyass@spam.shaw.ca),
-                            Joel Yliluoma (http://iki.fi/bisqwit/)
-                            Kris Bleakley (codeviolation@hotmail.com),
-                            Matthew Kendora,
-                            Nach (n-a-c-h@users.sourceforge.net),
-                            Peter Bortas (peter@bortas.org) and
-                            zones (kasumitokoduck@yahoo.com)
-
-  C4 x86 assembler and some C emulation code
-  (c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
-                            _Demo_ (_demo_@zsnes.com), and Nach
-
-  C4 C++ code
-  (c) Copyright 2003 Brad Jorsch
-
-  DSP-1 emulator code
-  (c) Copyright 1998 - 2004 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
-                            John Weidman, neviksti (neviksti@hotmail.com),
-                            Kris Bleakley, Andreas Naive
-
-  DSP-2 emulator code
-  (c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
-                     Lord Nightmare (lord_nightmare@users.sourceforge.net
-
-  OBC1 emulator code
-  (c) Copyright 2001 - 2004 zsKnight, pagefault (pagefault@zsnes.com) and
-                            Kris Bleakley
-  Ported from x86 assembler to C by sanmaiwashi
-
-  SPC7110 and RTC C++ emulator code
-  (c) Copyright 2002 Matthew Kendora with research by
-                     zsKnight, John Weidman, and Dark Force
-
-  S-DD1 C emulator code
-  (c) Copyright 2003 Brad Jorsch with research by
-                     Andreas Naive and John Weidman
- 
-  S-RTC C emulator code
-  (c) Copyright 2001 John Weidman
-  
-  ST010 C++ emulator code
-  (c) Copyright 2003 Feather, Kris Bleakley, John Weidman and Matthew Kendora
-
-  Super FX x86 assembler emulator code 
-  (c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault 
-
-  Super FX C emulator code 
-  (c) Copyright 1997 - 1999 Ivar, Gary Henderson and John Weidman
-
-
-  SH assembler code partly based on x86 assembler code
-  (c) Copyright 2002 - 2004 Marcus Comstedt (marcus@mc.pp.se) 
-
- 
-  Specific ports contains the works of other authors. See headers in
-  individual files.
- 
-  Snes9x homepage: http://www.snes9x.com
- 
-  Permission to use, copy, modify and 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>
-#include <errno.h>
-#include <fcntl.h>
-
-#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 int32 Echo [24000];
-extern int32 DummyEchoBuffer [SOUND_BUFFER_SIZE];
-extern int32 MixBuffer [SOUND_BUFFER_SIZE];
-extern int32 EchoBuffer [SOUND_BUFFER_SIZE];
-extern int32 FilterTaps [8];
-static uint8 FilterTapDefinitionBitfield;
-// In the above, bit I is set if FilterTaps[I] is non-zero.
-extern unsigned long Z;
-extern int32 Loop [16];
-
-extern long FilterValues[4][2];
-extern int32 NoiseFreq [32];
-
-static int32 noise_gen;
-
-#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)
-
-void S9xSetEightBitConsoleSound (bool8 Enabled)
-{
-	if (Settings.EightBitConsoleSound != Enabled)
-	{
-		Settings.EightBitConsoleSound = Enabled;
-		int i;
-		for (i = 0; i < 8; i++)
-		{
-			SoundData.channels[i].needs_decode = TRUE;
-		}
-	}
-}
-
-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 int64 steps [] =
-    {
-	//	0, 64, 1238, 1238, 256, 1, 64, 109, 64, 1238
-	0,
-	(int64) FIXED_POINT * 1000 * 64,
-	(int64) FIXED_POINT * 1000 * 619,
-	(int64) FIXED_POINT * 1000 * 619,
-	(int64) FIXED_POINT * 1000 * 128,
-	(int64) FIXED_POINT * 1000 * 1,
-	(int64) FIXED_POINT * 1000 * 64,
-	(int64) FIXED_POINT * 1000 * 55,
-	(int64) FIXED_POINT * 1000 * 64,
-	(int64) FIXED_POINT * 1000 * 619
-    };
-	
-    if (rate == 0 || so.playback_rate == 0)
-		ch->erate = 0;
-    else
-    {
-		ch->erate = (unsigned long)
-			(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];
-    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 || SNESGameFixes.EchoOnlyOutput)
-    {
-		SoundData.master_volume [0] = SoundData.master_volume [1] = 127;
-    }
-    else
-    {
-		SoundData.master_volume [0] = volume_left;
-		SoundData.master_volume [1] = volume_right;
-    }
-}
-
-void S9xSetEchoVolume (short volume_left, short volume_right)
-{
-    SoundData.echo_volume [0] = volume_left;
-    SoundData.echo_volume [1] = 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 < NUM_CHANNELS; 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;
-    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];
-    }
-    IAPU.Scanline = 0;
-}
-
-void S9xSetFilterCoefficient (int tap, int value)
-{
-	FilterTaps [tap & 7] = value;
-	if (value == 0 || (tap == 0 && value == 127))
-		FilterTapDefinitionBitfield &= ~(1 << (tap & 7));
-	else
-		FilterTapDefinitionBitfield |= 1 << (tap & 7);
-}
-
-void S9xSetSoundADSR (int channel, int attack_rate, int decay_rate,
-					  int sustain_rate, int sustain_level, int release_rate)
-{
-    Channel *ch = &SoundData.channels[channel];
-    ch->attack_rate = attack_rate;
-    ch->decay_rate = decay_rate;
-    ch->sustain_rate = sustain_rate;
-    ch->release_rate = release_rate;
-    ch->sustain_level = sustain_level + 1;
-	
-    switch (SoundData.channels[channel].state)
-    {
-    case SOUND_ATTACK:
-		S9xSetEnvRate (ch, attack_rate, 1, 127);
-		break;
-		
-    case SOUND_DECAY:
-		S9xSetEnvRate (ch, decay_rate, -1,
-			(MAX_ENVELOPE_HEIGHT * (sustain_level + 1)) >> 3);
-		break;
-    case SOUND_SUSTAIN:
-		S9xSetEnvRate (ch, 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) (SoundData.channels[channel].frequency * 49 / 50);
-		}
-    }
-}
-
-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 S9xSetSoundMute (bool8 mute)
-{
-    bool8 old = so.mute_sound;
-    so.mute_sound = mute;
-    return (old);
-}
-
-void AltDecodeBlock (Channel *ch)
-{
-    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 (USE_X86_ASM) && (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;
-    bool invalid_header;
-
-    if (Settings.AltSampleDecode)
-    {
-		if (Settings.AltSampleDecode < 3)
-			AltDecodeBlock (ch);
-		else
-			AltDecodeBlock2 (ch);
-        return;
-	}
-    if (ch->block_pointer > 0x10000 - 9)
-    {
-		ch->last_block = TRUE;
-		ch->loop = FALSE;
-		ch->block = ch->decoded;
-		return;
-    }
-
-	if (Settings.EightBitConsoleSound)
-	{
-	    signed char *compressed = (signed char *) &IAPU.RAM [ch->block_pointer];
-	
-	    filter = *compressed;
-	    if ((ch->last_block = filter & 1))
-			ch->loop = (filter & 2) != 0;
-
-		int16 interim[16];
-		uint8 interim_byte = 0;
-	
-		compressed++;
-		signed short *raw = ch->block = ch->decoded;
-	
-		// Seperate out the header parts used for decoding
-
-		shift = filter >> 4;
-	
-		// Header validity check: if range(shift) is over 12, ignore
-		// all bits of the data for that block except for the sign bit of each
-		invalid_header = (shift >= 0xD);
-
-		filter = filter&0x0c;
-
-		int32 prev0 = ch->previous [0];
-		int32 prev1 = ch->previous [1];
-
-		int16 amplitude = 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;
-				if (invalid_header) { sample1>>=3; sample2>>=3; }
-		
-			for (int nybblesmp = 0; nybblesmp<2; nybblesmp++){
-				out=(((nybblesmp) ? sample2 : sample1) << shift);
-				out >>= 1;
-			
-				switch(filter)
-				{
-					case 0x00:
-						// Method0 - [Smp]
-						break;
-				
-					case 0x04:
-						// Method1 - [Delta]+[Smp-1](15/16)
-						out+=(prev0>>1)+((-prev0)>>5);
-						break;
-				
-					case 0x08:
-						// Method2 - [Delta]+[Smp-1](61/32)-[Smp-2](15/16)
-						out+=(prev0)+((-(prev0 +(prev0>>1)))>>5)-(prev1>>1)+(prev1>>5);
-						break;
-				
-					default:
-						// Method3 - [Delta]+[Smp-1](115/64)-[Smp-2](13/16)
-						out+=(prev0)+((-(prev0 + (prev0<<2) + (prev0<<3)))>>7)-(prev1>>1)+((prev1+(prev1>>1))>>4);
-						break;
-				
-				}
-				CLIP16(out);
-				int16 result = (signed short)(out<<1);
-				if (abs(result) > amplitude)
-					amplitude = abs(result);
-				interim[interim_byte++] = out;
-				prev1=(signed short)prev0;
-				prev0=(signed short)(out<<1);
-			}
-		}
-		ch->previous [0] = prev0;
-		ch->previous [1] = prev1;
-
-		int32 total_deviation_from_previous = 0;
-		for (i = 1; i < 16; i++)
-			total_deviation_from_previous += abs(interim[i] - interim[i - 1]);
-		if (total_deviation_from_previous >= (int32) amplitude * 4)
-		{
-			/* Looks like noise. Generate noise. */
-			for (i = 0; i < 16; i++)
-			{
-				int feedback = (noise_gen << 13) ^ (noise_gen << 14);
-				noise_gen = (feedback & 0x4000) ^ (noise_gen >> 1);
-				ch->decoded[i] = (noise_gen << 17) >> 17;
-			}
-		}
-		else if (interim[0] < interim[1] && interim[1] < interim[2]
-		 && interim[2] < interim[3]
-		 && interim[4] > interim[5] && interim[5] > interim[6]
-		 && interim[6] > interim[7] && interim[7] > interim[8]
-		 && interim[8] > interim[9] && interim[9] > interim[10]
-		 && interim[10] > interim[11]
-		 && interim[12] < interim[13] && interim[13] < interim[14]
-		 && interim[14] < interim[15])
-		{
-			/* Looks like a sine or triangle wave. Make it a
-			 * triangle wave with an amplitude equivalent to that
-			 * of the highest amplitude sample of the block. */
-			ch->decoded[0] =  ch->decoded[8]  = 0;
-			ch->decoded[1] =  ch->decoded[7]  = amplitude / 4;
-			ch->decoded[2] =  ch->decoded[6]  = amplitude / 2;
-			ch->decoded[3] =  ch->decoded[5]  = amplitude * 3 / 4;
-			ch->decoded[4] =  amplitude;
-			ch->decoded[9] =  ch->decoded[15] = -(amplitude / 4);
-			ch->decoded[10] = ch->decoded[14] = -(amplitude / 2);
-			ch->decoded[11] = ch->decoded[13] = -(amplitude * 3 / 4);
-			ch->decoded[12] = -amplitude;
-		}
-		else if (interim[0] > interim[1] && interim[1] > interim[2]
-		 && interim[2] > interim[3]
-		 && interim[4] < interim[5] && interim[5] < interim[6]
-		 && interim[6] < interim[7] && interim[7] < interim[8]
-		 && interim[8] < interim[9] && interim[9] < interim[10]
-		 && interim[10] < interim[11]
-		 && interim[12] > interim[13] && interim[13] > interim[14]
-		 && interim[14] > interim[15])
-		{
-			/* Inverted triangle wave. */
-			ch->decoded[0] =  ch->decoded[8]  = 0;
-			ch->decoded[1] =  ch->decoded[7]  = -(amplitude / 4);
-			ch->decoded[2] =  ch->decoded[6]  = -(amplitude / 2);
-			ch->decoded[3] =  ch->decoded[5]  = -(amplitude * 3 / 4);
-			ch->decoded[4] = -amplitude;
-			ch->decoded[9] =  ch->decoded[15] = amplitude / 4;
-			ch->decoded[10] = ch->decoded[14] = amplitude / 2;
-			ch->decoded[11] = ch->decoded[13] = amplitude * 3 / 4;
-			ch->decoded[12] = amplitude;
-		}
-		else if (interim[0] < interim[1] && interim[1] < interim[2]
-		 && interim[2] < interim[3] && interim[3] < interim[4]
-		 && interim[4] < interim[5] && interim[5] < interim[6]
-		 && interim[6] < interim[7]
-		 && interim[8] > interim[9] && interim[9] > interim[10]
-		 && interim[10] > interim[11] && interim[11] > interim[12]
-		 && interim[12] > interim[13] && interim[13] > interim[14]
-		 && interim[14] > interim[15])
-		{
-			/* Looks like a V wave. Make it a half-triangle wave
-			 * with an amplitude equivalent to that
-			 * of the highest amplitude sample of the block. */
-			ch->decoded[0] =  0;
-			ch->decoded[1] =  ch->decoded[15] = amplitude / 8;
-			ch->decoded[2] =  ch->decoded[14] = amplitude / 4;
-			ch->decoded[3] =  ch->decoded[13] = amplitude * 3 / 8;
-			ch->decoded[4] =  ch->decoded[12] = amplitude / 2;
-			ch->decoded[5] =  ch->decoded[11] = amplitude * 5 / 8;
-			ch->decoded[6] =  ch->decoded[10] = amplitude * 3 / 4;
-			ch->decoded[7] =  ch->decoded[9]  = amplitude * 7 / 8;
-			ch->decoded[8] =  amplitude;
-		}
-		else if (interim[0] > interim[1] && interim[1] > interim[2]
-		 && interim[2] > interim[3] && interim[3] > interim[4]
-		 && interim[4] > interim[5] && interim[5] > interim[6]
-		 && interim[6] > interim[7]
-		 && interim[8] < interim[9] && interim[9] < interim[10]
-		 && interim[10] < interim[11] && interim[11] < interim[12]
-		 && interim[12] < interim[13] && interim[13] < interim[14]
-		 && interim[14] < interim[15])
-		{
-			/* Inverted V wave. */
-			ch->decoded[0] =  0;
-			ch->decoded[1] =  ch->decoded[15] = -(amplitude / 8);
-			ch->decoded[2] =  ch->decoded[14] = -(amplitude / 4);
-			ch->decoded[3] =  ch->decoded[13] = -(amplitude * 3 / 8);
-			ch->decoded[4] =  ch->decoded[12] = -(amplitude / 2);
-			ch->decoded[5] =  ch->decoded[11] = -(amplitude * 5 / 8);
-			ch->decoded[6] =  ch->decoded[10] = -(amplitude * 3 / 4);
-			ch->decoded[7] =  ch->decoded[9]  = -(amplitude * 7 / 8);
-			ch->decoded[8] =  -amplitude;
-		}
-		else
-		{
-			// Make it a square wave with an amplitude equivalent to that
-			// of the highest amplitude sample of the block.
-			// But actually put half of the amplitude, because
-			// square waves are just loud.
-			for (i = 0; i < 8; i++)
-				ch->decoded[i] = amplitude / 2;
-			for (i = 8; i < 16; i++)
-				ch->decoded[i] = -(amplitude / 2);
-		}
-	}
-	else
-	{
-	    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;
-	
-		// Seperate out the header parts used for decoding
-
-		shift = filter >> 4;
-	
-		// Header validity check: if range(shift) is over 12, ignore
-		// all bits of the data for that block except for the sign bit of each
-		invalid_header = (shift >= 0xD);
-
-		filter = filter&0x0c;
-
-		int32 prev0 = ch->previous [0];
-		int32 prev1 = ch->previous [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;
-				if (invalid_header) { sample1>>=3; sample2>>=3; }
-		
-			for (int nybblesmp = 0; nybblesmp<2; nybblesmp++){
-				out=(((nybblesmp) ? sample2 : sample1) << shift);
-				out >>= 1;
-			
-				switch(filter)
-				{
-					case 0x00:
-						// Method0 - [Smp]
-						break;
-				
-					case 0x04:
-						// Method1 - [Delta]+[Smp-1](15/16)
-						out+=(prev0>>1)+((-prev0)>>5);
-						break;
-				
-					case 0x08:
-						// Method2 - [Delta]+[Smp-1](61/32)-[Smp-2](15/16)
-						out+=(prev0)+((-(prev0 +(prev0>>1)))>>5)-(prev1>>1)+(prev1>>5);
-						break;
-				
-					default:
-						// Method3 - [Delta]+[Smp-1](115/64)-[Smp-2](13/16)
-						out+=(prev0)+((-(prev0 + (prev0<<2) + (prev0<<3)))>>7)-(prev1>>1)+((prev1+(prev1>>1))>>4);
-						break;
-				
-				}
-				CLIP16(out);
-					*raw++ = (signed short)(out<<1);
-				prev1=(signed short)prev0;
-				prev0=(signed short)(out<<1);
-			}
-		}
-		ch->previous [0] = prev0;
-		ch->previous [1] = prev1;
-	}
-	ch->block_pointer += 9;
-}
-
-static inline void MixStereo (int sample_count)
-{
-	static int32 wave[SOUND_BUFFER_SIZE];
-
-	int pitch_mod = SoundData.pitch_mod & ~APU.DSP[APU_NON];
-
-	for (uint32 J = 0; J < NUM_CHANNELS; J++) 
-	{
-		Channel *ch = &SoundData.channels[J];
-
-		if (ch->state == SOUND_SILENT || !(so.sound_switch & (1 << J)))
-			continue;
-
-		int32 VL, VR;
-		unsigned long freq0 = ch->frequency;
-
-		//		freq0 = (unsigned long) ((double) freq0 * 0.985);//uncommented by jonathan gevaryahu, as it is necessary for most cards in linux
-		freq0 = freq0 * 985/1000;
-
-		bool8 mod = pitch_mod & (1 << J);
-
-		if (ch->needs_decode) 
-		{
-			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);
-							}
-						}
-						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
-				{
-					// Snes9x 1.53's SPC_DSP.cpp, by blargg
-					int feedback = (noise_gen << 13) ^ (noise_gen << 14);
-					noise_gen = (feedback & 0x4000) ^ (noise_gen >> 1);
-					ch->sample = (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    ] += VL;
-			MixBuffer [I + 1] += VR;
-			ch->echo_buf_ptr [I    ] += VL;
-			ch->echo_buf_ptr [I + 1] += VR;
-		}
-stereo_exit: ;
-	}
-}
-
-#ifdef __DJGPP
-END_OF_FUNCTION(MixStereo);
-#endif
-
-#ifdef __sun
-extern uint8 int2ulaw (int);
-#endif
-
-// For backwards compatibility with older port specific code
-void S9xMixSamplesO (uint8 *buffer, int sample_count, int byte_offset)
-{
-    S9xMixSamples (buffer+byte_offset, sample_count);
-}
-#ifdef __DJGPP
-END_OF_FUNCTION(S9xMixSamplesO);
-#endif
-
-void S9xMixSamples (uint8 *buffer, int sample_count)
-{
-    int J;
-    int I;
-	
-    if (!so.mute_sound)
-    {
-		if (SoundData.echo_enable)
-			memset (EchoBuffer, 0, sample_count * sizeof (EchoBuffer [0]));
-		memset (MixBuffer, 0, sample_count * sizeof (MixBuffer [0]));
-      MixStereo (sample_count);
-    }
-	
-    /* Mix and convert waveforms */
-		int byte_count = sample_count << 1;
-		
-		// 16-bit sound
-		if (so.mute_sound)
-		{
-            memset (buffer, 0, byte_count);
-		}
-		else
-		{
-			if (SoundData.echo_enable && SoundData.echo_buffer_size)
-			{
-					// 16-bit stereo sound with echo enabled ...
-					if (FilterTapDefinitionBitfield == 0)
-					{
-						// ... 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] = 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];
-							if (FilterTapDefinitionBitfield & 0x02) E += Loop [(Z -  2) & 15] * FilterTaps [1];
-							if (FilterTapDefinitionBitfield & 0x04) E += Loop [(Z -  4) & 15] * FilterTaps [2];
-							if (FilterTapDefinitionBitfield & 0x08) E += Loop [(Z -  6) & 15] * FilterTaps [3];
-							if (FilterTapDefinitionBitfield & 0x10) E += Loop [(Z -  8) & 15] * FilterTaps [4];
-							if (FilterTapDefinitionBitfield & 0x20) E += Loop [(Z - 10) & 15] * FilterTaps [5];
-							if (FilterTapDefinitionBitfield & 0x40) E += Loop [(Z - 12) & 15] * FilterTaps [6];
-							if (FilterTapDefinitionBitfield & 0x80) 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] = 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] = I;
-			}
-		}
-	}
-}
-
-#ifdef __DJGPP
-END_OF_FUNCTION(S9xMixSamples);
-#endif
-
-void S9xResetSound (bool8 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;
-    FilterTapDefinitionBitfield = 0;
-    so.mute_sound = TRUE;
-    noise_gen = 1;
-    so.sound_switch = 255;
-    so.samples_mixed_so_far = 0;
-    so.play_position = 0;
-    so.err_counter = 0;
-	
-    if (full)
-    {
-		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 [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;
-}
-
-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 S9xInitSound (int mode, bool8 stereo, int buffer_size)
-{
-    so.sound_fd = -1;
-    so.sound_switch = 255;
-	
-    so.playback_rate = 0;
-    so.buffer_size = 0;
-    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 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)]);
-}
-
-