1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/gba/GBASound.cpp	Sun Mar 04 14:33:52 2012 -0600
     1.3 @@ -0,0 +1,1542 @@
     1.4 +#if (defined(WIN32) && !defined(SDL))
     1.5 +#   include "../win32/stdafx.h"
     1.6 +#   include "../win32/VBA.h"
     1.7 +#endif
     1.8 +
     1.9 +#include <cstring>
    1.10 +#include <cassert>
    1.11 +
    1.12 +#include "GBASound.h"
    1.13 +#include "../common/System.h" // SDL build needs this
    1.14 +#include "../common/Util.h"
    1.15 +#include "GBA.h"
    1.16 +#include "GBAGlobals.h"
    1.17 +
    1.18 +#ifndef countof
    1.19 +#define countof(a)  (sizeof(a) / sizeof(a[0]))
    1.20 +#endif
    1.21 +
    1.22 +soundtick_t USE_TICKS_AS = 380; // (16777216.0/44100.0); // FIXME: (16777216.0/280896.0)(fps) vs 60.0fps?
    1.23 +
    1.24 +#define SOUND_MAGIC   0x60000000
    1.25 +#define SOUND_MAGIC_2 0x30000000
    1.26 +#define NOISE_MAGIC (2097152.0 / 44100.0)
    1.27 +
    1.28 +extern bool8 stopState;
    1.29 +
    1.30 +u8 soundWavePattern[4][32] = {
    1.31 +	{ 0x01, 0x01, 0x01, 0x01,
    1.32 +	  0xff, 0xff, 0xff, 0xff,
    1.33 +	  0xff, 0xff, 0xff, 0xff,
    1.34 +	  0xff, 0xff, 0xff, 0xff,
    1.35 +	  0xff, 0xff, 0xff, 0xff,
    1.36 +	  0xff, 0xff, 0xff, 0xff,
    1.37 +	  0xff, 0xff, 0xff, 0xff,
    1.38 +	  0xff, 0xff, 0xff, 0xff },
    1.39 +	{ 0x01, 0x01, 0x01, 0x01,
    1.40 +	  0x01, 0x01, 0x01, 0x01,
    1.41 +	  0xff, 0xff, 0xff, 0xff,
    1.42 +	  0xff, 0xff, 0xff, 0xff,
    1.43 +	  0xff, 0xff, 0xff, 0xff,
    1.44 +	  0xff, 0xff, 0xff, 0xff,
    1.45 +	  0xff, 0xff, 0xff, 0xff,
    1.46 +	  0xff, 0xff, 0xff, 0xff },
    1.47 +	{ 0x01, 0x01, 0x01, 0x01,
    1.48 +	  0x01, 0x01, 0x01, 0x01,
    1.49 +	  0x01, 0x01, 0x01, 0x01,
    1.50 +	  0x01, 0x01, 0x01, 0x01,
    1.51 +	  0xff, 0xff, 0xff, 0xff,
    1.52 +	  0xff, 0xff, 0xff, 0xff,
    1.53 +	  0xff, 0xff, 0xff, 0xff,
    1.54 +	  0xff, 0xff, 0xff, 0xff },
    1.55 +	{ 0x01, 0x01, 0x01, 0x01,
    1.56 +	  0x01, 0x01, 0x01, 0x01,
    1.57 +	  0x01, 0x01, 0x01, 0x01,
    1.58 +	  0x01, 0x01, 0x01, 0x01,
    1.59 +	  0x01, 0x01, 0x01, 0x01,
    1.60 +	  0x01, 0x01, 0x01, 0x01,
    1.61 +	  0xff, 0xff, 0xff, 0xff,
    1.62 +	  0xff, 0xff, 0xff, 0xff }
    1.63 +};
    1.64 +
    1.65 +int32 soundFreqRatio[8] = {
    1.66 +	1048576, // 0
    1.67 +	524288, // 1
    1.68 +	262144, // 2
    1.69 +	174763, // 3
    1.70 +	131072, // 4
    1.71 +	104858, // 5
    1.72 +	87381, // 6
    1.73 +	74898  // 7
    1.74 +};
    1.75 +
    1.76 +int32 soundShiftClock[16] = {
    1.77 +	2,   // 0
    1.78 +	4,   // 1
    1.79 +	8,   // 2
    1.80 +	16,  // 3
    1.81 +	32,  // 4
    1.82 +	64,  // 5
    1.83 +	128, // 6
    1.84 +	256, // 7
    1.85 +	512, // 8
    1.86 +	1024, // 9
    1.87 +	2048, // 10
    1.88 +	4096, // 11
    1.89 +	8192, // 12
    1.90 +	16384, // 13
    1.91 +	1,   // 14
    1.92 +	1    // 15
    1.93 +};
    1.94 +
    1.95 +int32 soundVolume = 0;
    1.96 +
    1.97 +u8	soundBuffer[6][735];
    1.98 +u16 soundFinalWave[1470];
    1.99 +u16 soundFrameSound[735 * 30 * 2]; // for avi logging
   1.100 +
   1.101 +u32			soundBufferLen		= 1470;
   1.102 +u32			soundBufferTotalLen = 14700;
   1.103 +int32		soundQuality		= 2;
   1.104 +int32		soundPaused			= 1;
   1.105 +int32		soundPlay			= 0;
   1.106 +soundtick_t soundTicks			= soundQuality * USE_TICKS_AS;
   1.107 +soundtick_t SOUND_CLOCK_TICKS	= soundQuality * USE_TICKS_AS;
   1.108 +u32			soundNextPosition	= 0;
   1.109 +
   1.110 +int32 soundLevel1 = 0;
   1.111 +int32 soundLevel2 = 0;
   1.112 +int32 soundBalance = 0;
   1.113 +int32 soundMasterOn = 0;
   1.114 +u32	  soundIndex = 0;
   1.115 +u32	  soundBufferIndex		 = 0;
   1.116 +int32 soundFrameSoundWritten = 0;
   1.117 +int32 soundDebug			 = 0;
   1.118 +bool8 soundOffFlag			 = false;
   1.119 +
   1.120 +int32 sound1On = 0;
   1.121 +int32 sound1ATL = 0;
   1.122 +int32 sound1Skip = 0;
   1.123 +int32 sound1Index = 0;
   1.124 +int32 sound1Continue = 0;
   1.125 +int32 sound1EnvelopeVolume	  = 0;
   1.126 +int32 sound1EnvelopeATL		  = 0;
   1.127 +int32 sound1EnvelopeUpDown	  = 0;
   1.128 +int32 sound1EnvelopeATLReload = 0;
   1.129 +int32 sound1SweepATL		  = 0;
   1.130 +int32 sound1SweepATLReload	  = 0;
   1.131 +int32 sound1SweepSteps		  = 0;
   1.132 +int32 sound1SweepUpDown		  = 0;
   1.133 +int32 sound1SweepStep		  = 0;
   1.134 +u8 *  sound1Wave			  = soundWavePattern[2];
   1.135 +
   1.136 +int32 sound2On = 0;
   1.137 +int32 sound2ATL = 0;
   1.138 +int32 sound2Skip = 0;
   1.139 +int32 sound2Index = 0;
   1.140 +int32 sound2Continue = 0;
   1.141 +int32 sound2EnvelopeVolume	  = 0;
   1.142 +int32 sound2EnvelopeATL		  = 0;
   1.143 +int32 sound2EnvelopeUpDown	  = 0;
   1.144 +int32 sound2EnvelopeATLReload = 0;
   1.145 +u8 *  sound2Wave			  = soundWavePattern[2];
   1.146 +
   1.147 +int32 sound3On = 0;
   1.148 +int32 sound3ATL			= 0;
   1.149 +int32 sound3Skip		= 0;
   1.150 +int32 sound3Index		= 0;
   1.151 +int32 sound3Continue	= 0;
   1.152 +int32 sound3OutputLevel = 0;
   1.153 +int32 sound3Last		= 0;
   1.154 +u8	  sound3WaveRam[0x20];
   1.155 +int32 sound3Bank		 = 0;
   1.156 +int32 sound3DataSize	 = 0;
   1.157 +int32 sound3ForcedOutput = 0;
   1.158 +
   1.159 +int32 sound4On = 0;
   1.160 +int32 sound4Clock = 0;
   1.161 +int32 sound4ATL = 0;
   1.162 +int32 sound4Skip = 0;
   1.163 +int32 sound4Index = 0;
   1.164 +int32 sound4ShiftRight		  = 0x7f;
   1.165 +int32 sound4ShiftSkip		  = 0;
   1.166 +int32 sound4ShiftIndex		  = 0;
   1.167 +int32 sound4NSteps			  = 0;
   1.168 +int32 sound4CountDown		  = 0;
   1.169 +int32 sound4Continue		  = 0;
   1.170 +int32 sound4EnvelopeVolume	  = 0;
   1.171 +int32 sound4EnvelopeATL		  = 0;
   1.172 +int32 sound4EnvelopeUpDown	  = 0;
   1.173 +int32 sound4EnvelopeATLReload = 0;
   1.174 +
   1.175 +int32 soundControl = 0;
   1.176 +
   1.177 +int32 soundDSFifoAIndex		 = 0;
   1.178 +int32 soundDSFifoACount		 = 0;
   1.179 +int32 soundDSFifoAWriteIndex = 0;
   1.180 +bool8 soundDSAEnabled		 = false;
   1.181 +int32 soundDSATimer = 0;
   1.182 +u8	  soundDSFifoA[32];
   1.183 +u8	  soundDSAValue = 0;
   1.184 +
   1.185 +int32 soundDSFifoBIndex		 = 0;
   1.186 +int32 soundDSFifoBCount		 = 0;
   1.187 +int32 soundDSFifoBWriteIndex = 0;
   1.188 +bool8 soundDSBEnabled		 = false;
   1.189 +int32 soundDSBTimer = 0;
   1.190 +u8	  soundDSFifoB[32];
   1.191 +u8	  soundDSBValue = 0;
   1.192 +
   1.193 +int32 soundEnableFlag = 0x3ff;
   1.194 +int32 soundMutedFlag  = 0;
   1.195 +
   1.196 +s16	  soundFilter[4000];
   1.197 +s16	  soundRight[5] = { 0, 0, 0, 0, 0 };
   1.198 +s16	  soundLeft[5] = { 0, 0, 0, 0, 0 };
   1.199 +int32 soundEchoIndex = 0;
   1.200 +bool8 soundEcho		 = false;
   1.201 +bool8 soundLowPass	 = false;
   1.202 +bool8 soundReverse	 = false;
   1.203 +
   1.204 +static int32  soundTicks_int32;
   1.205 +static int32  SOUND_CLOCK_TICKS_int32;
   1.206 +static int32  soundDSBValue_int32;
   1.207 +variable_desc soundSaveStruct[] = {
   1.208 +	{ &soundPaused,				sizeof(int32)					  },
   1.209 +	{ &soundPlay,				sizeof(int32)					  },
   1.210 +	{ &soundTicks_int32,		sizeof(int32)					  },
   1.211 +	{ &SOUND_CLOCK_TICKS_int32, sizeof(int32)					  },
   1.212 +	{ &soundLevel1,				sizeof(int32)					  },
   1.213 +	{ &soundLevel2,				sizeof(int32)					  },
   1.214 +	{ &soundBalance,			sizeof(int32)					  },
   1.215 +	{ &soundMasterOn,			sizeof(int32)					  },
   1.216 +	{ &soundIndex,				sizeof(int32)					  },
   1.217 +	{ &sound1On,				sizeof(int32)					  },
   1.218 +	{ &sound1ATL,				sizeof(int32)					  },
   1.219 +	{ &sound1Skip,				sizeof(int32)					  },
   1.220 +	{ &sound1Index,				sizeof(int32)					  },
   1.221 +	{ &sound1Continue,			sizeof(int32)					  },
   1.222 +	{ &sound1EnvelopeVolume,	sizeof(int32)					  },
   1.223 +	{ &sound1EnvelopeATL,		sizeof(int32)					  },
   1.224 +	{ &sound1EnvelopeATLReload, sizeof(int32)					  },
   1.225 +	{ &sound1EnvelopeUpDown,	sizeof(int32)					  },
   1.226 +	{ &sound1SweepATL,			sizeof(int32)					  },
   1.227 +	{ &sound1SweepATLReload,	sizeof(int32)					  },
   1.228 +	{ &sound1SweepSteps,		sizeof(int32)					  },
   1.229 +	{ &sound1SweepUpDown,		sizeof(int32)					  },
   1.230 +	{ &sound1SweepStep,			sizeof(int32)					  },
   1.231 +	{ &sound2On,				sizeof(int32)					  },
   1.232 +	{ &sound2ATL,				sizeof(int32)					  },
   1.233 +	{ &sound2Skip,				sizeof(int32)					  },
   1.234 +	{ &sound2Index,				sizeof(int32)					  },
   1.235 +	{ &sound2Continue,			sizeof(int32)					  },
   1.236 +	{ &sound2EnvelopeVolume,	sizeof(int32)					  },
   1.237 +	{ &sound2EnvelopeATL,		sizeof(int32)					  },
   1.238 +	{ &sound2EnvelopeATLReload, sizeof(int32)					  },
   1.239 +	{ &sound2EnvelopeUpDown,	sizeof(int32)					  },
   1.240 +	{ &sound3On,				sizeof(int32)					  },
   1.241 +	{ &sound3ATL,				sizeof(int32)					  },
   1.242 +	{ &sound3Skip,				sizeof(int32)					  },
   1.243 +	{ &sound3Index,				sizeof(int32)					  },
   1.244 +	{ &sound3Continue,			sizeof(int32)					  },
   1.245 +	{ &sound3OutputLevel,		sizeof(int32)					  },
   1.246 +	{ &sound4On,				sizeof(int32)					  },
   1.247 +	{ &sound4ATL,				sizeof(int32)					  },
   1.248 +	{ &sound4Skip,				sizeof(int32)					  },
   1.249 +	{ &sound4Index,				sizeof(int32)					  },
   1.250 +	{ &sound4Clock,				sizeof(int32)					  },
   1.251 +	{ &sound4ShiftRight,		sizeof(int32)					  },
   1.252 +	{ &sound4ShiftSkip,			sizeof(int32)					  },
   1.253 +	{ &sound4ShiftIndex,		sizeof(int32)					  },
   1.254 +	{ &sound4NSteps,			sizeof(int32)					  },
   1.255 +	{ &sound4CountDown,			sizeof(int32)					  },
   1.256 +	{ &sound4Continue,			sizeof(int32)					  },
   1.257 +	{ &sound4EnvelopeVolume,	sizeof(int32)					  },
   1.258 +	{ &sound4EnvelopeATL,		sizeof(int32)					  },
   1.259 +	{ &sound4EnvelopeATLReload, sizeof(int32)					  },
   1.260 +	{ &sound4EnvelopeUpDown,	sizeof(int32)					  },
   1.261 +	{ &soundEnableFlag,			sizeof(int32)					  },
   1.262 +	{ &soundControl,			sizeof(int32)					  },
   1.263 +	{ &soundDSFifoAIndex,		sizeof(int32)					  },
   1.264 +	{ &soundDSFifoACount,		sizeof(int32)					  },
   1.265 +	{ &soundDSFifoAWriteIndex,	sizeof(int32)					  },
   1.266 +	{ &soundDSAEnabled,			sizeof(bool8)					  },
   1.267 +	{ &soundDSATimer,			sizeof(int32)					  },
   1.268 +	{ &soundDSFifoA[0],			32								  },
   1.269 +	{ &soundDSAValue,			sizeof(u8)						  },
   1.270 +	{ &soundDSFifoBIndex,		sizeof(int32)					  },
   1.271 +	{ &soundDSFifoBCount,		sizeof(int32)					  },
   1.272 +	{ &soundDSFifoBWriteIndex,	sizeof(int32)					  },
   1.273 +	{ &soundDSBEnabled,			sizeof(int32)					  },
   1.274 +	{ &soundDSBTimer,			sizeof(int32)					  },
   1.275 +	{ &soundDSFifoB[0],			32								  },
   1.276 +	{ &soundDSBValue_int32,		sizeof(int32)					  }, // save as int32 because of a mistake of the past.
   1.277 +	{ &soundBuffer[0][0],		6 * 735							  },
   1.278 +	{ &soundFinalWave[0],		2 * 735							  },
   1.279 +	{ NULL,						0								  }
   1.280 +};
   1.281 +
   1.282 +variable_desc soundSaveStructV2[] = {
   1.283 +	{ &sound3WaveRam[0],   0x20							},
   1.284 +	{ &sound3Bank,		   sizeof(int32)				},
   1.285 +	{ &sound3DataSize,	   sizeof(int32)				},
   1.286 +	{ &sound3ForcedOutput, sizeof(int32)				},
   1.287 +	{ NULL,				   0							}
   1.288 +};
   1.289 +
   1.290 +//variable_desc soundSaveStructV3[] = {
   1.291 +//  { &soundTicks, sizeof(soundtick_t) },
   1.292 +//  { &SOUND_CLOCK_TICKS, sizeof(soundtick_t) },
   1.293 +//  { &USE_TICKS_AS, sizeof(soundtick_t) },
   1.294 +//  { NULL, 0 }
   1.295 +//};
   1.296 +
   1.297 +void soundEvent(u32 address, u8 data)
   1.298 +{
   1.299 +	int freq = 0;
   1.300 +
   1.301 +	switch (address)
   1.302 +	{
   1.303 +	case NR10:
   1.304 +		data &= 0x7f;
   1.305 +		sound1SweepATL	  = sound1SweepATLReload = 344 * ((data >> 4) & 7);
   1.306 +		sound1SweepSteps  = data & 7;
   1.307 +		sound1SweepUpDown = data & 0x08;
   1.308 +		sound1SweepStep	  = 0;
   1.309 +		ioMem[address]	  = data;
   1.310 +		break;
   1.311 +	case NR11:
   1.312 +		sound1Wave	   = soundWavePattern[data >> 6];
   1.313 +		sound1ATL	   = 172 * (64 - (data & 0x3f));
   1.314 +		ioMem[address] = data;
   1.315 +		break;
   1.316 +	case NR12:
   1.317 +		sound1EnvelopeUpDown	= data & 0x08;
   1.318 +		sound1EnvelopeATLReload = 689 * (data & 7);
   1.319 +		if ((data & 0xF8) == 0)
   1.320 +			sound1EnvelopeVolume = 0;
   1.321 +		ioMem[address] = data;
   1.322 +		break;
   1.323 +	case NR13:
   1.324 +		freq	  = (((int)(ioMem[NR14] & 7)) << 8) | data;
   1.325 +		sound1ATL = 172 * (64 - (ioMem[NR11] & 0x3f));
   1.326 +		freq	  = 2048 - freq;
   1.327 +		if (freq)
   1.328 +		{
   1.329 +			sound1Skip = SOUND_MAGIC / freq;
   1.330 +		}
   1.331 +		else
   1.332 +			sound1Skip = 0;
   1.333 +		ioMem[address] = data;
   1.334 +		break;
   1.335 +	case NR14:
   1.336 +		data &= 0xC7;
   1.337 +		freq = (((int)(data & 7) << 8) | ioMem[NR13]);
   1.338 +		freq = 2048 - freq;
   1.339 +		sound1ATL	   = 172 * (64 - (ioMem[NR11] & 0x3f));
   1.340 +		sound1Continue = data & 0x40;
   1.341 +		if (freq)
   1.342 +		{
   1.343 +			sound1Skip = SOUND_MAGIC / freq;
   1.344 +		}
   1.345 +		else
   1.346 +			sound1Skip = 0;
   1.347 +		if (data & 0x80)
   1.348 +		{
   1.349 +			ioMem[NR52] |= 1;
   1.350 +			sound1EnvelopeVolume = ioMem[NR12] >> 4;
   1.351 +			sound1EnvelopeUpDown = ioMem[NR12] & 0x08;
   1.352 +			sound1ATL = 172 * (64 - (ioMem[NR11] & 0x3f));
   1.353 +			sound1EnvelopeATLReload = sound1EnvelopeATL = 689 * (ioMem[NR12] & 7);
   1.354 +			sound1SweepATL			= sound1SweepATLReload = 344 * ((ioMem[NR10] >> 4) & 7);
   1.355 +			sound1SweepSteps		= ioMem[NR10] & 7;
   1.356 +			sound1SweepUpDown		= ioMem[NR10] & 0x08;
   1.357 +			sound1SweepStep			= 0;
   1.358 +
   1.359 +			sound1Index = 0;
   1.360 +			sound1On	= 1;
   1.361 +		}
   1.362 +		ioMem[address] = data;
   1.363 +		break;
   1.364 +	case NR21:
   1.365 +		sound2Wave	   = soundWavePattern[data >> 6];
   1.366 +		sound2ATL	   = 172 * (64 - (data & 0x3f));
   1.367 +		ioMem[address] = data;
   1.368 +		break;
   1.369 +	case NR22:
   1.370 +		sound2EnvelopeUpDown	= data & 0x08;
   1.371 +		sound2EnvelopeATLReload = 689 * (data & 7);
   1.372 +		if ((data & 0xF8) == 0)
   1.373 +			sound2EnvelopeVolume = 0;
   1.374 +		ioMem[address] = data;
   1.375 +		break;
   1.376 +	case NR23:
   1.377 +		freq	  = (((int)(ioMem[NR24] & 7)) << 8) | data;
   1.378 +		sound2ATL = 172 * (64 - (ioMem[NR21] & 0x3f));
   1.379 +		freq	  = 2048 - freq;
   1.380 +		if (freq)
   1.381 +		{
   1.382 +			sound2Skip = SOUND_MAGIC / freq;
   1.383 +		}
   1.384 +		else
   1.385 +			sound2Skip = 0;
   1.386 +		ioMem[address] = data;
   1.387 +		break;
   1.388 +	case NR24:
   1.389 +		data &= 0xC7;
   1.390 +		freq = (((int)(data & 7) << 8) | ioMem[NR23]);
   1.391 +		freq = 2048 - freq;
   1.392 +		sound2ATL	   = 172 * (64 - (ioMem[NR21] & 0x3f));
   1.393 +		sound2Continue = data & 0x40;
   1.394 +		if (freq)
   1.395 +		{
   1.396 +			sound2Skip = SOUND_MAGIC / freq;
   1.397 +		}
   1.398 +		else
   1.399 +			sound2Skip = 0;
   1.400 +		if (data & 0x80)
   1.401 +		{
   1.402 +			ioMem[NR52] |= 2;
   1.403 +			sound2EnvelopeVolume = ioMem[NR22] >> 4;
   1.404 +			sound2EnvelopeUpDown = ioMem[NR22] & 0x08;
   1.405 +			sound2ATL = 172 * (64 - (ioMem[NR21] & 0x3f));
   1.406 +			sound2EnvelopeATLReload = sound2EnvelopeATL = 689 * (ioMem[NR22] & 7);
   1.407 +
   1.408 +			sound2Index = 0;
   1.409 +			sound2On	= 1;
   1.410 +		}
   1.411 +		ioMem[address] = data;
   1.412 +		break;
   1.413 +	case NR30:
   1.414 +		data &= 0xe0;
   1.415 +		if (!(data & 0x80))
   1.416 +		{
   1.417 +			ioMem[NR52] &= 0xfb;
   1.418 +			sound3On	 = 0;
   1.419 +		}
   1.420 +		if (((data >> 6) & 1) != sound3Bank)
   1.421 +			memcpy(&ioMem[0x90], &sound3WaveRam[(((data >> 6) & 1) * 0x10) ^ 0x10],
   1.422 +			       0x10);
   1.423 +		sound3Bank	   = (data >> 6) & 1;
   1.424 +		sound3DataSize = (data >> 5) & 1;
   1.425 +		ioMem[address] = data;
   1.426 +		break;
   1.427 +	case NR31:
   1.428 +		sound3ATL	   = 172 * (256 - data);
   1.429 +		ioMem[address] = data;
   1.430 +		break;
   1.431 +	case NR32:
   1.432 +		data &= 0xe0;
   1.433 +		sound3OutputLevel  = (data >> 5) & 3;
   1.434 +		sound3ForcedOutput = (data >> 7) & 1;
   1.435 +		ioMem[address]	   = data;
   1.436 +		break;
   1.437 +	case NR33:
   1.438 +		freq = 2048 - (((int)(ioMem[NR34] & 7) << 8) | data);
   1.439 +		if (freq)
   1.440 +		{
   1.441 +			sound3Skip = SOUND_MAGIC_2 / freq;
   1.442 +		}
   1.443 +		else
   1.444 +			sound3Skip = 0;
   1.445 +		ioMem[address] = data;
   1.446 +		break;
   1.447 +	case NR34:
   1.448 +		data &= 0xc7;
   1.449 +		freq  = 2048 - (((data & 7) << 8) | (int)ioMem[NR33]);
   1.450 +		if (freq)
   1.451 +		{
   1.452 +			sound3Skip = SOUND_MAGIC_2 / freq;
   1.453 +		}
   1.454 +		else
   1.455 +		{
   1.456 +			sound3Skip = 0;
   1.457 +		}
   1.458 +		sound3Continue = data & 0x40;
   1.459 +		if ((data & 0x80) && (ioMem[NR30] & 0x80))
   1.460 +		{
   1.461 +			ioMem[NR52] |= 4;
   1.462 +			sound3ATL	 = 172 * (256 - ioMem[NR31]);
   1.463 +			sound3Index	 = 0;
   1.464 +			sound3On	 = 1;
   1.465 +		}
   1.466 +		ioMem[address] = data;
   1.467 +		break;
   1.468 +	case NR41:
   1.469 +		data &= 0x3f;
   1.470 +		sound4ATL	   = 172 * (64 - (data & 0x3f));
   1.471 +		ioMem[address] = data;
   1.472 +		break;
   1.473 +	case NR42:
   1.474 +		sound4EnvelopeUpDown	= data & 0x08;
   1.475 +		sound4EnvelopeATLReload = 689 * (data & 7);
   1.476 +		if ((data & 0xF8) == 0)
   1.477 +			sound4EnvelopeVolume = 0;
   1.478 +		ioMem[address] = data;
   1.479 +		break;
   1.480 +	case NR43:
   1.481 +		freq		 = soundFreqRatio[data & 7];
   1.482 +		sound4NSteps = data & 0x08;
   1.483 +
   1.484 +		sound4Skip = freq * NOISE_MAGIC;
   1.485 +
   1.486 +		sound4Clock = data >> 4;
   1.487 +
   1.488 +		freq = freq / soundShiftClock[sound4Clock];
   1.489 +
   1.490 +		sound4ShiftSkip = freq * NOISE_MAGIC;
   1.491 +		ioMem[address]	= data;
   1.492 +		break;
   1.493 +	case NR44:
   1.494 +		data &= 0xc0;
   1.495 +		sound4Continue = data & 0x40;
   1.496 +		if (data & 0x80)
   1.497 +		{
   1.498 +			ioMem[NR52] |= 8;
   1.499 +			sound4EnvelopeVolume = ioMem[NR42] >> 4;
   1.500 +			sound4EnvelopeUpDown = ioMem[NR42] & 0x08;
   1.501 +			sound4ATL = 172 * (64 - (ioMem[NR41] & 0x3f));
   1.502 +			sound4EnvelopeATLReload = sound4EnvelopeATL = 689 * (ioMem[NR42] & 7);
   1.503 +
   1.504 +			sound4On = 1;
   1.505 +
   1.506 +			sound4Index		 = 0;
   1.507 +			sound4ShiftIndex = 0;
   1.508 +
   1.509 +			freq = soundFreqRatio[ioMem[NR43] & 7];
   1.510 +
   1.511 +			sound4Skip = freq * NOISE_MAGIC;
   1.512 +
   1.513 +			sound4NSteps = ioMem[NR43] & 0x08;
   1.514 +
   1.515 +			freq = freq / soundShiftClock[ioMem[NR43] >> 4];
   1.516 +
   1.517 +			sound4ShiftSkip = freq * NOISE_MAGIC;
   1.518 +			if (sound4NSteps)
   1.519 +				sound4ShiftRight = 0x7f;
   1.520 +			else
   1.521 +				sound4ShiftRight = 0x7fff;
   1.522 +		}
   1.523 +		ioMem[address] = data;
   1.524 +		break;
   1.525 +	case NR50:
   1.526 +		data &= 0x77;
   1.527 +		soundLevel1	   = data & 7;
   1.528 +		soundLevel2	   = (data >> 4) & 7;
   1.529 +		ioMem[address] = data;
   1.530 +		break;
   1.531 +	case NR51:
   1.532 +		soundBalance   = (data & soundEnableFlag);
   1.533 +		ioMem[address] = data;
   1.534 +		break;
   1.535 +	case NR52:
   1.536 +		data &= 0x80;
   1.537 +		data |= ioMem[NR52] & 15;
   1.538 +		soundMasterOn = data & 0x80;
   1.539 +		if (!(data & 0x80))
   1.540 +		{
   1.541 +			sound1On = 0;
   1.542 +			sound2On = 0;
   1.543 +			sound3On = 0;
   1.544 +			sound4On = 0;
   1.545 +		}
   1.546 +		ioMem[address] = data;
   1.547 +		break;
   1.548 +	case 0x90:
   1.549 +	case 0x91:
   1.550 +	case 0x92:
   1.551 +	case 0x93:
   1.552 +	case 0x94:
   1.553 +	case 0x95:
   1.554 +	case 0x96:
   1.555 +	case 0x97:
   1.556 +	case 0x98:
   1.557 +	case 0x99:
   1.558 +	case 0x9a:
   1.559 +	case 0x9b:
   1.560 +	case 0x9c:
   1.561 +	case 0x9d:
   1.562 +	case 0x9e:
   1.563 +	case 0x9f:
   1.564 +		sound3WaveRam[(sound3Bank * 0x10) ^ 0x10 + (address & 15)] = data;
   1.565 +		break;
   1.566 +	}
   1.567 +}
   1.568 +
   1.569 +void soundEvent(u32 address, u16 data)
   1.570 +{
   1.571 +	switch (address)
   1.572 +	{
   1.573 +	case SGCNT0_H:
   1.574 +		data		&= 0xFF0F;
   1.575 +		soundControl = data & 0x770F;;
   1.576 +		if (data & 0x0800)
   1.577 +		{
   1.578 +			soundDSFifoAWriteIndex = 0;
   1.579 +			soundDSFifoAIndex	   = 0;
   1.580 +			soundDSFifoACount	   = 0;
   1.581 +			soundDSAValue = 0;
   1.582 +			memset(soundDSFifoA, 0, 32);
   1.583 +		}
   1.584 +		soundDSAEnabled = (data & 0x0300) ? true : false;
   1.585 +		soundDSATimer	= (data & 0x0400) ? 1 : 0;
   1.586 +		if (data & 0x8000)
   1.587 +		{
   1.588 +			soundDSFifoBWriteIndex = 0;
   1.589 +			soundDSFifoBIndex	   = 0;
   1.590 +			soundDSFifoBCount	   = 0;
   1.591 +			soundDSBValue = 0;
   1.592 +			memset(soundDSFifoB, 0, 32);
   1.593 +		}
   1.594 +		soundDSBEnabled = (data & 0x3000) ? true : false;
   1.595 +		soundDSBTimer	= (data & 0x4000) ? 1 : 0;
   1.596 +		*((u16 *)&ioMem[address]) = data;
   1.597 +		break;
   1.598 +	case FIFOA_L:
   1.599 +	case FIFOA_H:
   1.600 +		soundDSFifoA[soundDSFifoAWriteIndex++] = data & 0xFF;
   1.601 +		soundDSFifoA[soundDSFifoAWriteIndex++] = data >> 8;
   1.602 +		soundDSFifoACount		 += 2;
   1.603 +		soundDSFifoAWriteIndex	 &= 31;
   1.604 +		*((u16 *)&ioMem[address]) = data;
   1.605 +		break;
   1.606 +	case FIFOB_L:
   1.607 +	case FIFOB_H:
   1.608 +		soundDSFifoB[soundDSFifoBWriteIndex++] = data & 0xFF;
   1.609 +		soundDSFifoB[soundDSFifoBWriteIndex++] = data >> 8;
   1.610 +		soundDSFifoBCount		 += 2;
   1.611 +		soundDSFifoBWriteIndex	 &= 31;
   1.612 +		*((u16 *)&ioMem[address]) = data;
   1.613 +		break;
   1.614 +	case 0x88:
   1.615 +		data &= 0xC3FF;
   1.616 +		*((u16 *)&ioMem[address]) = data;
   1.617 +		break;
   1.618 +	case 0x90:
   1.619 +	case 0x92:
   1.620 +	case 0x94:
   1.621 +	case 0x96:
   1.622 +	case 0x98:
   1.623 +	case 0x9a:
   1.624 +	case 0x9c:
   1.625 +	case 0x9e:
   1.626 +		*((u16 *)&sound3WaveRam[(sound3Bank * 0x10) ^ 0x10 + (address & 14)]) = data;
   1.627 +		*((u16 *)&ioMem[address]) = data;
   1.628 +		break;
   1.629 +	}
   1.630 +}
   1.631 +
   1.632 +void soundChannel1()
   1.633 +{
   1.634 +	int vol = sound1EnvelopeVolume;
   1.635 +
   1.636 +	int freq  = 0;
   1.637 +	int value = 0;
   1.638 +
   1.639 +	if (sound1On && (sound1ATL || !sound1Continue))
   1.640 +	{
   1.641 +		sound1Index += soundQuality * sound1Skip;
   1.642 +		sound1Index &= 0x1fffffff;
   1.643 +
   1.644 +		value = ((s8)sound1Wave[sound1Index >> 24]) * vol;
   1.645 +	}
   1.646 +
   1.647 +	soundBuffer[0][soundIndex] = value;
   1.648 +
   1.649 +	if (sound1On)
   1.650 +	{
   1.651 +		if (sound1ATL)
   1.652 +		{
   1.653 +			sound1ATL -= soundQuality;
   1.654 +
   1.655 +			if (sound1ATL <= 0 && sound1Continue)
   1.656 +			{
   1.657 +				ioMem[NR52] &= 0xfe;
   1.658 +				sound1On	 = 0;
   1.659 +			}
   1.660 +		}
   1.661 +
   1.662 +		if (sound1EnvelopeATL)
   1.663 +		{
   1.664 +			sound1EnvelopeATL -= soundQuality;
   1.665 +
   1.666 +			if (sound1EnvelopeATL <= 0)
   1.667 +			{
   1.668 +				if (sound1EnvelopeUpDown)
   1.669 +				{
   1.670 +					if (sound1EnvelopeVolume < 15)
   1.671 +						sound1EnvelopeVolume++;
   1.672 +				}
   1.673 +				else
   1.674 +				{
   1.675 +					if (sound1EnvelopeVolume)
   1.676 +						sound1EnvelopeVolume--;
   1.677 +				}
   1.678 +
   1.679 +				sound1EnvelopeATL += sound1EnvelopeATLReload;
   1.680 +			}
   1.681 +		}
   1.682 +
   1.683 +		if (sound1SweepATL)
   1.684 +		{
   1.685 +			sound1SweepATL -= soundQuality;
   1.686 +
   1.687 +			if (sound1SweepATL <= 0)
   1.688 +			{
   1.689 +				freq = (((int)(ioMem[NR14] & 7) << 8) | ioMem[NR13]);
   1.690 +
   1.691 +				int updown = 1;
   1.692 +
   1.693 +				if (sound1SweepUpDown)
   1.694 +					updown = -1;
   1.695 +
   1.696 +				int newfreq = 0;
   1.697 +				if (sound1SweepSteps)
   1.698 +				{
   1.699 +					newfreq = freq + updown * freq / (1 << sound1SweepSteps);
   1.700 +					if (newfreq == freq)
   1.701 +						newfreq = 0;
   1.702 +				}
   1.703 +				else
   1.704 +					newfreq = freq;
   1.705 +
   1.706 +				if (newfreq < 0)
   1.707 +				{
   1.708 +					sound1SweepATL += sound1SweepATLReload;
   1.709 +				}
   1.710 +				else if (newfreq > 2047)
   1.711 +				{
   1.712 +					sound1SweepATL = 0;
   1.713 +					sound1On	   = 0;
   1.714 +					ioMem[NR52]	  &= 0xfe;
   1.715 +				}
   1.716 +				else
   1.717 +				{
   1.718 +					sound1SweepATL += sound1SweepATLReload;
   1.719 +					sound1Skip		= SOUND_MAGIC / (2048 - newfreq);
   1.720 +
   1.721 +					ioMem[NR13] = newfreq & 0xff;
   1.722 +					ioMem[NR14] = (ioMem[NR14] & 0xf8) | ((newfreq >> 8) & 7);
   1.723 +				}
   1.724 +			}
   1.725 +		}
   1.726 +	}
   1.727 +}
   1.728 +
   1.729 +void soundChannel2()
   1.730 +{
   1.731 +	//  int freq = 0;
   1.732 +	int vol = sound2EnvelopeVolume;
   1.733 +
   1.734 +	int value = 0;
   1.735 +
   1.736 +	if (sound2On && (sound2ATL || !sound2Continue))
   1.737 +	{
   1.738 +		sound2Index += soundQuality * sound2Skip;
   1.739 +		sound2Index &= 0x1fffffff;
   1.740 +
   1.741 +		value = ((s8)sound2Wave[sound2Index >> 24]) * vol;
   1.742 +	}
   1.743 +
   1.744 +	soundBuffer[1][soundIndex] = value;
   1.745 +
   1.746 +	if (sound2On)
   1.747 +	{
   1.748 +		if (sound2ATL)
   1.749 +		{
   1.750 +			sound2ATL -= soundQuality;
   1.751 +
   1.752 +			if (sound2ATL <= 0 && sound2Continue)
   1.753 +			{
   1.754 +				ioMem[NR52] &= 0xfd;
   1.755 +				sound2On	 = 0;
   1.756 +			}
   1.757 +		}
   1.758 +
   1.759 +		if (sound2EnvelopeATL)
   1.760 +		{
   1.761 +			sound2EnvelopeATL -= soundQuality;
   1.762 +
   1.763 +			if (sound2EnvelopeATL <= 0)
   1.764 +			{
   1.765 +				if (sound2EnvelopeUpDown)
   1.766 +				{
   1.767 +					if (sound2EnvelopeVolume < 15)
   1.768 +						sound2EnvelopeVolume++;
   1.769 +				}
   1.770 +				else
   1.771 +				{
   1.772 +					if (sound2EnvelopeVolume)
   1.773 +						sound2EnvelopeVolume--;
   1.774 +				}
   1.775 +				sound2EnvelopeATL += sound2EnvelopeATLReload;
   1.776 +			}
   1.777 +		}
   1.778 +	}
   1.779 +}
   1.780 +
   1.781 +void soundChannel3()
   1.782 +{
   1.783 +	int value = sound3Last;
   1.784 +
   1.785 +	if (sound3On && (sound3ATL || !sound3Continue))
   1.786 +	{
   1.787 +		sound3Index += soundQuality * sound3Skip;
   1.788 +		if (sound3DataSize)
   1.789 +		{
   1.790 +			sound3Index &= 0x3fffffff;
   1.791 +			value		 = sound3WaveRam[sound3Index >> 25];
   1.792 +		}
   1.793 +		else
   1.794 +		{
   1.795 +			sound3Index &= 0x1fffffff;
   1.796 +			value		 = sound3WaveRam[sound3Bank * 0x10 + (sound3Index >> 25)];
   1.797 +		}
   1.798 +
   1.799 +		if ((sound3Index & 0x01000000))
   1.800 +		{
   1.801 +			value &= 0x0f;
   1.802 +		}
   1.803 +		else
   1.804 +		{
   1.805 +			value >>= 4;
   1.806 +		}
   1.807 +
   1.808 +		value -= 8;
   1.809 +		value *= 2;
   1.810 +
   1.811 +		if (sound3ForcedOutput)
   1.812 +		{
   1.813 +			value = ((value >> 1) + value) >> 1;
   1.814 +		}
   1.815 +		else
   1.816 +		{
   1.817 +			switch (sound3OutputLevel)
   1.818 +			{
   1.819 +			case 0:
   1.820 +				value = 0;
   1.821 +				break;
   1.822 +			case 1:
   1.823 +				break;
   1.824 +			case 2:
   1.825 +				value = (value >> 1);
   1.826 +				break;
   1.827 +			case 3:
   1.828 +				value = (value >> 2);
   1.829 +				break;
   1.830 +			}
   1.831 +		}
   1.832 +		//value += 1;
   1.833 +		sound3Last = value;
   1.834 +	}
   1.835 +
   1.836 +	soundBuffer[2][soundIndex] = value;
   1.837 +
   1.838 +	if (sound3On)
   1.839 +	{
   1.840 +		if (sound3ATL)
   1.841 +		{
   1.842 +			sound3ATL -= soundQuality;
   1.843 +
   1.844 +			if (sound3ATL <= 0 && sound3Continue)
   1.845 +			{
   1.846 +				ioMem[NR52] &= 0xfb;
   1.847 +				sound3On	 = 0;
   1.848 +			}
   1.849 +		}
   1.850 +	}
   1.851 +}
   1.852 +
   1.853 +void soundChannel4()
   1.854 +{
   1.855 +	int vol = sound4EnvelopeVolume;
   1.856 +
   1.857 +	int value = 0;
   1.858 +
   1.859 +	if (sound4Clock <= 0x0c)
   1.860 +	{
   1.861 +		if (sound4On && (sound4ATL || !sound4Continue))
   1.862 +		{
   1.863 +	  #define NOISE_ONE_SAMP_SCALE  0x200000
   1.864 +
   1.865 +			sound4Index		 += soundQuality * sound4Skip;
   1.866 +			sound4ShiftIndex += soundQuality * sound4ShiftSkip;
   1.867 +
   1.868 +			if (sound4NSteps)
   1.869 +			{
   1.870 +				while (sound4ShiftIndex >= NOISE_ONE_SAMP_SCALE)
   1.871 +				{
   1.872 +					sound4ShiftRight = (((sound4ShiftRight << 6) ^
   1.873 +					                     (sound4ShiftRight << 5)) & 0x40) |
   1.874 +					                   (sound4ShiftRight >> 1);
   1.875 +					sound4ShiftIndex -= NOISE_ONE_SAMP_SCALE;
   1.876 +				}
   1.877 +			}
   1.878 +			else
   1.879 +			{
   1.880 +				while (sound4ShiftIndex >= NOISE_ONE_SAMP_SCALE)
   1.881 +				{
   1.882 +					sound4ShiftRight = (((sound4ShiftRight << 14) ^
   1.883 +					                     (sound4ShiftRight << 13)) & 0x4000) |
   1.884 +					                   (sound4ShiftRight >> 1);
   1.885 +
   1.886 +					sound4ShiftIndex -= NOISE_ONE_SAMP_SCALE;
   1.887 +				}
   1.888 +			}
   1.889 +
   1.890 +			sound4Index		 %= NOISE_ONE_SAMP_SCALE;
   1.891 +			sound4ShiftIndex %= NOISE_ONE_SAMP_SCALE;
   1.892 +
   1.893 +			value = ((sound4ShiftRight & 1) * 2 - 1) * vol;
   1.894 +		}
   1.895 +		else
   1.896 +		{
   1.897 +			value = 0;
   1.898 +		}
   1.899 +	}
   1.900 +
   1.901 +	soundBuffer[3][soundIndex] = value;
   1.902 +
   1.903 +	if (sound4On)
   1.904 +	{
   1.905 +		if (sound4ATL)
   1.906 +		{
   1.907 +			sound4ATL -= soundQuality;
   1.908 +
   1.909 +			if (sound4ATL <= 0 && sound4Continue)
   1.910 +			{
   1.911 +				ioMem[NR52] &= 0xfd;
   1.912 +				sound4On	 = 0;
   1.913 +			}
   1.914 +		}
   1.915 +
   1.916 +		if (sound4EnvelopeATL)
   1.917 +		{
   1.918 +			sound4EnvelopeATL -= soundQuality;
   1.919 +
   1.920 +			if (sound4EnvelopeATL <= 0)
   1.921 +			{
   1.922 +				if (sound4EnvelopeUpDown)
   1.923 +				{
   1.924 +					if (sound4EnvelopeVolume < 15)
   1.925 +						sound4EnvelopeVolume++;
   1.926 +				}
   1.927 +				else
   1.928 +				{
   1.929 +					if (sound4EnvelopeVolume)
   1.930 +						sound4EnvelopeVolume--;
   1.931 +				}
   1.932 +				sound4EnvelopeATL += sound4EnvelopeATLReload;
   1.933 +			}
   1.934 +		}
   1.935 +	}
   1.936 +}
   1.937 +
   1.938 +void soundDirectSoundA()
   1.939 +{
   1.940 +	soundBuffer[4][soundIndex] = soundDSAValue;
   1.941 +}
   1.942 +
   1.943 +void soundDirectSoundATimer()
   1.944 +{
   1.945 +	if (soundDSAEnabled)
   1.946 +	{
   1.947 +		if (soundDSFifoACount <= 16)
   1.948 +		{
   1.949 +			CPUCheckDMA(3, 2);
   1.950 +			if (soundDSFifoACount <= 16)
   1.951 +			{
   1.952 +				soundEvent(FIFOA_L, (u16)0);
   1.953 +				soundEvent(FIFOA_H, (u16)0);
   1.954 +				soundEvent(FIFOA_L, (u16)0);
   1.955 +				soundEvent(FIFOA_H, (u16)0);
   1.956 +				soundEvent(FIFOA_L, (u16)0);
   1.957 +				soundEvent(FIFOA_H, (u16)0);
   1.958 +				soundEvent(FIFOA_L, (u16)0);
   1.959 +				soundEvent(FIFOA_H, (u16)0);
   1.960 +			}
   1.961 +		}
   1.962 +
   1.963 +		soundDSAValue	  = (soundDSFifoA[soundDSFifoAIndex]);
   1.964 +		soundDSFifoAIndex = (++soundDSFifoAIndex) & 31;
   1.965 +		soundDSFifoACount--;
   1.966 +	}
   1.967 +	else
   1.968 +		soundDSAValue = 0;
   1.969 +}
   1.970 +
   1.971 +void soundDirectSoundB()
   1.972 +{
   1.973 +	soundBuffer[5][soundIndex] = soundDSBValue;
   1.974 +}
   1.975 +
   1.976 +void soundDirectSoundBTimer()
   1.977 +{
   1.978 +	if (soundDSBEnabled)
   1.979 +	{
   1.980 +		if (soundDSFifoBCount <= 16)
   1.981 +		{
   1.982 +			CPUCheckDMA(3, 4);
   1.983 +			if (soundDSFifoBCount <= 16)
   1.984 +			{
   1.985 +				soundEvent(FIFOB_L, (u16)0);
   1.986 +				soundEvent(FIFOB_H, (u16)0);
   1.987 +				soundEvent(FIFOB_L, (u16)0);
   1.988 +				soundEvent(FIFOB_H, (u16)0);
   1.989 +				soundEvent(FIFOB_L, (u16)0);
   1.990 +				soundEvent(FIFOB_H, (u16)0);
   1.991 +				soundEvent(FIFOB_L, (u16)0);
   1.992 +				soundEvent(FIFOB_H, (u16)0);
   1.993 +			}
   1.994 +		}
   1.995 +
   1.996 +		soundDSBValue	  = (soundDSFifoB[soundDSFifoBIndex]);
   1.997 +		soundDSFifoBIndex = (++soundDSFifoBIndex) & 31;
   1.998 +		soundDSFifoBCount--;
   1.999 +	}
  1.1000 +	else
  1.1001 +	{
  1.1002 +		soundDSBValue = 0;
  1.1003 +	}
  1.1004 +}
  1.1005 +
  1.1006 +void soundTimerOverflow(int timer)
  1.1007 +{
  1.1008 +	if (soundDSAEnabled && (soundDSATimer == timer))
  1.1009 +	{
  1.1010 +		soundDirectSoundATimer();
  1.1011 +	}
  1.1012 +	if (soundDSBEnabled && (soundDSBTimer == timer))
  1.1013 +	{
  1.1014 +		soundDirectSoundBTimer();
  1.1015 +	}
  1.1016 +}
  1.1017 +
  1.1018 +void soundMix()
  1.1019 +{
  1.1020 +	int res		 = 0;
  1.1021 +	int cgbRes	 = 0;
  1.1022 +	int ratio	 = ioMem[0x82] & 3;
  1.1023 +	int dsaRatio = ioMem[0x82] & 4;
  1.1024 +	int dsbRatio = ioMem[0x82] & 8;
  1.1025 +
  1.1026 +	if (ioMem)
  1.1027 +		soundBalance = (ioMem[NR51] & soundEnableFlag & ~soundMutedFlag);
  1.1028 +
  1.1029 +	if (soundBalance & 16)
  1.1030 +	{
  1.1031 +		cgbRes = ((s8)soundBuffer[0][soundIndex]);
  1.1032 +	}
  1.1033 +	if (soundBalance & 32)
  1.1034 +	{
  1.1035 +		cgbRes += ((s8)soundBuffer[1][soundIndex]);
  1.1036 +	}
  1.1037 +	if (soundBalance & 64)
  1.1038 +	{
  1.1039 +		cgbRes += ((s8)soundBuffer[2][soundIndex]);
  1.1040 +	}
  1.1041 +	if (soundBalance & 128)
  1.1042 +	{
  1.1043 +		cgbRes += ((s8)soundBuffer[3][soundIndex]);
  1.1044 +	}
  1.1045 +
  1.1046 +	if ((soundControl & 0x0200) && (soundEnableFlag & 0x100))
  1.1047 +	{
  1.1048 +		if (!dsaRatio)
  1.1049 +			res = ((s8)soundBuffer[4][soundIndex]) >> 1;
  1.1050 +		else
  1.1051 +			res = ((s8)soundBuffer[4][soundIndex]);
  1.1052 +	}
  1.1053 +
  1.1054 +	if ((soundControl & 0x2000) && (soundEnableFlag & 0x200))
  1.1055 +	{
  1.1056 +		if (!dsbRatio)
  1.1057 +			res += ((s8)soundBuffer[5][soundIndex]) >> 1;
  1.1058 +		else
  1.1059 +			res += ((s8)soundBuffer[5][soundIndex]);
  1.1060 +	}
  1.1061 +
  1.1062 +	res	   = (res * 170);
  1.1063 +	cgbRes = (cgbRes * 52 * soundLevel1);
  1.1064 +
  1.1065 +	switch (ratio)
  1.1066 +	{
  1.1067 +	case 0:
  1.1068 +	case 3: // prohibited, but 25%
  1.1069 +		cgbRes >>= 2;
  1.1070 +		break;
  1.1071 +	case 1:
  1.1072 +		cgbRes >>= 1;
  1.1073 +		break;
  1.1074 +	case 2:
  1.1075 +		break;
  1.1076 +	}
  1.1077 +
  1.1078 +	res += cgbRes;
  1.1079 +
  1.1080 +	if (soundEcho)
  1.1081 +	{
  1.1082 +		res *= 2;
  1.1083 +		res += soundFilter[soundEchoIndex];
  1.1084 +		res /= 2;
  1.1085 +		soundFilter[soundEchoIndex++] = res;
  1.1086 +	}
  1.1087 +
  1.1088 +	if (soundLowPass)
  1.1089 +	{
  1.1090 +		soundLeft[4] = soundLeft[3];
  1.1091 +		soundLeft[3] = soundLeft[2];
  1.1092 +		soundLeft[2] = soundLeft[1];
  1.1093 +		soundLeft[1] = soundLeft[0];
  1.1094 +		soundLeft[0] = res;
  1.1095 +		res = (soundLeft[4] + 2 * soundLeft[3] + 8 * soundLeft[2] + 2 * soundLeft[1] +
  1.1096 +		       soundLeft[0]) / 14;
  1.1097 +	}
  1.1098 +
  1.1099 +	bool noSpecialEffects = false;
  1.1100 +#if (defined(WIN32) && !defined(SDL))
  1.1101 +	if (theApp.soundRecording || theApp.aviRecording || theApp.nvAudioLog)
  1.1102 +		noSpecialEffects = true;
  1.1103 +#endif
  1.1104 +
  1.1105 +	if (!noSpecialEffects)
  1.1106 +	{
  1.1107 +		switch (soundVolume)
  1.1108 +		{
  1.1109 +		case 0:
  1.1110 +		case 1:
  1.1111 +		case 2:
  1.1112 +		case 3:
  1.1113 +			res *= (soundVolume + 1);
  1.1114 +			break;
  1.1115 +		case 4:
  1.1116 +			res >>= 2;
  1.1117 +			break;
  1.1118 +		case 5:
  1.1119 +			res >>= 1;
  1.1120 +			break;
  1.1121 +		}
  1.1122 +	}
  1.1123 +
  1.1124 +	if (res > 32767)
  1.1125 +		res = 32767;
  1.1126 +	if (res < -32768)
  1.1127 +		res = -32768;
  1.1128 +
  1.1129 +	if (soundReverse && !noSpecialEffects)
  1.1130 +	{
  1.1131 +		soundFinalWave[++soundBufferIndex] = res;
  1.1132 +		if ((soundFrameSoundWritten + 1) >= countof(soundFrameSound))
  1.1133 +			/*assert(false)*/;
  1.1134 +		else
  1.1135 +			soundFrameSound[++soundFrameSoundWritten] = res;
  1.1136 +	}
  1.1137 +	else
  1.1138 +	{
  1.1139 +		soundFinalWave[soundBufferIndex++] = res;
  1.1140 +		if (soundFrameSoundWritten >= countof(soundFrameSound))
  1.1141 +			/*assert(false)*/;
  1.1142 +		else
  1.1143 +			soundFrameSound[soundFrameSoundWritten++] = res;
  1.1144 +	}
  1.1145 +
  1.1146 +	res	   = 0;
  1.1147 +	cgbRes = 0;
  1.1148 +
  1.1149 +	if (soundBalance & 1)
  1.1150 +	{
  1.1151 +		cgbRes = ((s8)soundBuffer[0][soundIndex]);
  1.1152 +	}
  1.1153 +	if (soundBalance & 2)
  1.1154 +	{
  1.1155 +		cgbRes += ((s8)soundBuffer[1][soundIndex]);
  1.1156 +	}
  1.1157 +	if (soundBalance & 4)
  1.1158 +	{
  1.1159 +		cgbRes += ((s8)soundBuffer[2][soundIndex]);
  1.1160 +	}
  1.1161 +	if (soundBalance & 8)
  1.1162 +	{
  1.1163 +		cgbRes += ((s8)soundBuffer[3][soundIndex]);
  1.1164 +	}
  1.1165 +
  1.1166 +	if ((soundControl & 0x0100) && (soundEnableFlag & 0x100))
  1.1167 +	{
  1.1168 +		if (!dsaRatio)
  1.1169 +			res = ((s8)soundBuffer[4][soundIndex]) >> 1;
  1.1170 +		else
  1.1171 +			res = ((s8)soundBuffer[4][soundIndex]);
  1.1172 +	}
  1.1173 +
  1.1174 +	if ((soundControl & 0x1000) && (soundEnableFlag & 0x200))
  1.1175 +	{
  1.1176 +		if (!dsbRatio)
  1.1177 +			res += ((s8)soundBuffer[5][soundIndex]) >> 1;
  1.1178 +		else
  1.1179 +			res += ((s8)soundBuffer[5][soundIndex]);
  1.1180 +	}
  1.1181 +
  1.1182 +	res	   = (res * 170);
  1.1183 +	cgbRes = (cgbRes * 52 * soundLevel1);
  1.1184 +
  1.1185 +	switch (ratio)
  1.1186 +	{
  1.1187 +	case 0:
  1.1188 +	case 3: // prohibited, but 25%
  1.1189 +		cgbRes >>= 2;
  1.1190 +		break;
  1.1191 +	case 1:
  1.1192 +		cgbRes >>= 1;
  1.1193 +		break;
  1.1194 +	case 2:
  1.1195 +		break;
  1.1196 +	}
  1.1197 +
  1.1198 +	res += cgbRes;
  1.1199 +
  1.1200 +	if (soundEcho)
  1.1201 +	{
  1.1202 +		res *= 2;
  1.1203 +		res += soundFilter[soundEchoIndex];
  1.1204 +		res /= 2;
  1.1205 +		soundFilter[soundEchoIndex++] = res;
  1.1206 +
  1.1207 +		if (soundEchoIndex >= 4000)
  1.1208 +			soundEchoIndex = 0;
  1.1209 +	}
  1.1210 +
  1.1211 +	if (soundLowPass)
  1.1212 +	{
  1.1213 +		soundRight[4] = soundRight[3];
  1.1214 +		soundRight[3] = soundRight[2];
  1.1215 +		soundRight[2] = soundRight[1];
  1.1216 +		soundRight[1] = soundRight[0];
  1.1217 +		soundRight[0] = res;
  1.1218 +		res = (soundRight[4] + 2 * soundRight[3] + 8 * soundRight[2] + 2 * soundRight[1] +
  1.1219 +		       soundRight[0]) / 14;
  1.1220 +	}
  1.1221 +
  1.1222 +	if (!noSpecialEffects)
  1.1223 +	{
  1.1224 +		switch (soundVolume)
  1.1225 +		{
  1.1226 +		case 0:
  1.1227 +		case 1:
  1.1228 +		case 2:
  1.1229 +		case 3:
  1.1230 +			res *= (soundVolume + 1);
  1.1231 +			break;
  1.1232 +		case 4:
  1.1233 +			res >>= 2;
  1.1234 +			break;
  1.1235 +		case 5:
  1.1236 +			res >>= 1;
  1.1237 +			break;
  1.1238 +		}
  1.1239 +	}
  1.1240 +
  1.1241 +	if (res > 32767)
  1.1242 +		res = 32767;
  1.1243 +	if (res < -32768)
  1.1244 +		res = -32768;
  1.1245 +
  1.1246 +	if (soundReverse && !noSpecialEffects)
  1.1247 +	{
  1.1248 +		soundFinalWave[-1 + soundBufferIndex++]		   = res;
  1.1249 +		if ((soundFrameSoundWritten) >= countof(soundFrameSound))
  1.1250 +			/*assert(false)*/;
  1.1251 +		else
  1.1252 +			soundFrameSound[-1 + soundFrameSoundWritten++] = res;
  1.1253 +	}
  1.1254 +	else
  1.1255 +	{
  1.1256 +		soundFinalWave[soundBufferIndex++]			  = res;
  1.1257 +		if ((soundFrameSoundWritten + 1) >= countof(soundFrameSound))
  1.1258 +			/*assert(false)*/;
  1.1259 +		else
  1.1260 +			soundFrameSound[soundFrameSoundWritten++] = res;
  1.1261 +	}
  1.1262 +}
  1.1263 +
  1.1264 +void soundTick()
  1.1265 +{
  1.1266 +	if (systemSoundOn)
  1.1267 +	{
  1.1268 +		if (soundMasterOn && !stopState)
  1.1269 +		{
  1.1270 +			soundChannel1();
  1.1271 +			soundChannel2();
  1.1272 +			soundChannel3();
  1.1273 +			soundChannel4();
  1.1274 +			soundDirectSoundA();
  1.1275 +			soundDirectSoundB();
  1.1276 +			soundMix();
  1.1277 +		}
  1.1278 +		else
  1.1279 +		{
  1.1280 +			soundFinalWave[soundBufferIndex++] = 0;
  1.1281 +			soundFinalWave[soundBufferIndex++] = 0;
  1.1282 +			if ((soundFrameSoundWritten + 1) >= countof(soundFrameSound))
  1.1283 +				/*assert(false)*/;
  1.1284 +			else
  1.1285 +			{
  1.1286 +				soundFrameSound[soundFrameSoundWritten++] = 0;
  1.1287 +				soundFrameSound[soundFrameSoundWritten++] = 0;
  1.1288 +			}
  1.1289 +		}
  1.1290 +
  1.1291 +		soundIndex++;
  1.1292 +
  1.1293 +		if (2 * soundBufferIndex >= soundBufferLen)
  1.1294 +		{
  1.1295 +			if (systemSoundOn)
  1.1296 +			{
  1.1297 +				if (soundPaused)
  1.1298 +				{
  1.1299 +					soundResume();
  1.1300 +				}
  1.1301 +
  1.1302 +				systemSoundWriteToBuffer();
  1.1303 +			}
  1.1304 +			soundIndex		 = 0;
  1.1305 +			soundBufferIndex = 0;
  1.1306 +		}
  1.1307 +	}
  1.1308 +}
  1.1309 +
  1.1310 +void soundShutdown()
  1.1311 +{
  1.1312 +	systemSoundShutdown();
  1.1313 +}
  1.1314 +
  1.1315 +void soundPause()
  1.1316 +{
  1.1317 +	systemSoundPause();
  1.1318 +}
  1.1319 +
  1.1320 +void soundResume()
  1.1321 +{
  1.1322 +	systemSoundResume();
  1.1323 +}
  1.1324 +
  1.1325 +void soundEnableChannels(int channels)
  1.1326 +{
  1.1327 +	int c = (channels & 0x0f) << 4;
  1.1328 +	soundEnableFlag |= ((channels & 0x30f) | c);
  1.1329 +}
  1.1330 +
  1.1331 +void soundDisableChannels(int channels)
  1.1332 +{
  1.1333 +	int c = (channels & 0x0f) << 4;
  1.1334 +	soundEnableFlag &= ~((channels & 0x30f) | c);
  1.1335 +}
  1.1336 +
  1.1337 +int soundGetEnabledChannels()
  1.1338 +{
  1.1339 +	return (soundEnableFlag & 0x30f);
  1.1340 +}
  1.1341 +
  1.1342 +#if 0
  1.1343 +// unused
  1.1344 +void soundMuteChannels(int channels)
  1.1345 +{
  1.1346 +	soundMutedFlag |= channels & 0x30f;
  1.1347 +}
  1.1348 +
  1.1349 +void soundUnmuteChannels(int channels)
  1.1350 +{
  1.1351 +	soundMutedFlag &= ~(channels & 0x30f);
  1.1352 +}
  1.1353 +
  1.1354 +int soundGetMutedChannels()
  1.1355 +{
  1.1356 +	return (soundMutedFlag & 0x30f);
  1.1357 +}
  1.1358 +#endif
  1.1359 +
  1.1360 +void soundReset()
  1.1361 +{
  1.1362 +	systemSoundReset();
  1.1363 +
  1.1364 +	soundPaused		  = 1;
  1.1365 +	soundPlay		  = 0;
  1.1366 +	SOUND_CLOCK_TICKS = soundQuality * USE_TICKS_AS;
  1.1367 +	soundTicks		  = SOUND_CLOCK_TICKS;
  1.1368 +	soundNextPosition = 0;
  1.1369 +	soundMasterOn	  = 1;
  1.1370 +	soundIndex		  = 0;
  1.1371 +	soundBufferIndex  = 0;
  1.1372 +	soundLevel1		  = 7;
  1.1373 +	soundLevel2		  = 7;
  1.1374 +
  1.1375 +	sound1On = 0;
  1.1376 +	sound1ATL = 0;
  1.1377 +	sound1Skip = 0;
  1.1378 +	sound1Index = 0;
  1.1379 +	sound1Continue = 0;
  1.1380 +	sound1EnvelopeVolume	= 0;
  1.1381 +	sound1EnvelopeATL		= 0;
  1.1382 +	sound1EnvelopeUpDown	= 0;
  1.1383 +	sound1EnvelopeATLReload = 0;
  1.1384 +	sound1SweepATL			= 0;
  1.1385 +	sound1SweepATLReload	= 0;
  1.1386 +	sound1SweepSteps		= 0;
  1.1387 +	sound1SweepUpDown		= 0;
  1.1388 +	sound1SweepStep			= 0;
  1.1389 +	sound1Wave				= soundWavePattern[2];
  1.1390 +
  1.1391 +	sound2On = 0;
  1.1392 +	sound2ATL = 0;
  1.1393 +	sound2Skip = 0;
  1.1394 +	sound2Index = 0;
  1.1395 +	sound2Continue = 0;
  1.1396 +	sound2EnvelopeVolume	= 0;
  1.1397 +	sound2EnvelopeATL		= 0;
  1.1398 +	sound2EnvelopeUpDown	= 0;
  1.1399 +	sound2EnvelopeATLReload = 0;
  1.1400 +	sound2Wave				= soundWavePattern[2];
  1.1401 +
  1.1402 +	sound3On = 0;
  1.1403 +	sound3ATL = 0;
  1.1404 +	sound3Skip		   = 0;
  1.1405 +	sound3Index		   = 0;
  1.1406 +	sound3Continue	   = 0;
  1.1407 +	sound3OutputLevel  = 0;
  1.1408 +	sound3Last		   = 0;
  1.1409 +	sound3Bank		   = 0;
  1.1410 +	sound3DataSize	   = 0;
  1.1411 +	sound3ForcedOutput = 0;
  1.1412 +
  1.1413 +	sound4On = 0;
  1.1414 +	sound4Clock = 0;
  1.1415 +	sound4ATL = 0;
  1.1416 +	sound4Skip = 0;
  1.1417 +	sound4Index = 0;
  1.1418 +	sound4ShiftRight		= 0x7f;
  1.1419 +	sound4NSteps			= 0;
  1.1420 +	sound4CountDown			= 0;
  1.1421 +	sound4Continue			= 0;
  1.1422 +	sound4EnvelopeVolume	= 0;
  1.1423 +	sound4EnvelopeATL		= 0;
  1.1424 +	sound4EnvelopeUpDown	= 0;
  1.1425 +	sound4EnvelopeATLReload = 0;
  1.1426 +
  1.1427 +	sound1On = 0;
  1.1428 +	sound2On = 0;
  1.1429 +	sound3On = 0;
  1.1430 +	sound4On = 0;
  1.1431 +
  1.1432 +	int addr = 0x90;
  1.1433 +
  1.1434 +	while (addr < 0xA0)
  1.1435 +	{
  1.1436 +		ioMem[addr++] = 0x00;
  1.1437 +		ioMem[addr++] = 0xff;
  1.1438 +	}
  1.1439 +
  1.1440 +	addr = 0;
  1.1441 +	while (addr < 0x20)
  1.1442 +	{
  1.1443 +		sound3WaveRam[addr++] = 0x00;
  1.1444 +		sound3WaveRam[addr++] = 0xff;
  1.1445 +	}
  1.1446 +
  1.1447 +	memset(soundFinalWave, 0, soundBufferLen);
  1.1448 +
  1.1449 +	memset(soundFilter, 0, sizeof(soundFilter));
  1.1450 +	soundEchoIndex = 0;
  1.1451 +}
  1.1452 +
  1.1453 +bool soundInit()
  1.1454 +{
  1.1455 +	if (systemSoundInit())
  1.1456 +	{
  1.1457 +		memset(soundBuffer[0], 0, 735 * 2);
  1.1458 +		memset(soundBuffer[1], 0, 735 * 2);
  1.1459 +		memset(soundBuffer[2], 0, 735 * 2);
  1.1460 +		memset(soundBuffer[3], 0, 735 * 2);
  1.1461 +
  1.1462 +		memset(soundFinalWave, 0, soundBufferLen);
  1.1463 +
  1.1464 +		soundPaused = 1;
  1.1465 +		return true;
  1.1466 +	}
  1.1467 +	return false;
  1.1468 +}
  1.1469 +
  1.1470 +void soundSetQuality(int quality)
  1.1471 +{
  1.1472 +	if (soundQuality != quality && systemSoundCanChangeQuality())
  1.1473 +	{
  1.1474 +		if (!soundOffFlag)
  1.1475 +			soundShutdown();
  1.1476 +		soundQuality	  = quality;
  1.1477 +		soundNextPosition = 0;
  1.1478 +		if (!soundOffFlag)
  1.1479 +			soundInit();
  1.1480 +		SOUND_CLOCK_TICKS = USE_TICKS_AS * soundQuality;
  1.1481 +		soundIndex		  = 0;
  1.1482 +		soundBufferIndex  = 0;
  1.1483 +	}
  1.1484 +	else if (soundQuality != quality)
  1.1485 +	{
  1.1486 +		soundNextPosition = 0;
  1.1487 +		SOUND_CLOCK_TICKS = USE_TICKS_AS * soundQuality;
  1.1488 +		soundIndex		  = 0;
  1.1489 +		soundBufferIndex  = 0;
  1.1490 +	}
  1.1491 +}
  1.1492 +
  1.1493 +void soundSaveGame(gzFile gzFile)
  1.1494 +{
  1.1495 +	soundTicks_int32		= (int32) soundTicks;
  1.1496 +	SOUND_CLOCK_TICKS_int32 = (int32) SOUND_CLOCK_TICKS;
  1.1497 +	soundDSBValue_int32		= (int32) soundDSBValue;
  1.1498 +
  1.1499 +	utilWriteData(gzFile, soundSaveStruct);
  1.1500 +	utilWriteData(gzFile, soundSaveStructV2);
  1.1501 +
  1.1502 +	utilGzWrite(gzFile, &soundQuality, sizeof(int32));
  1.1503 +	//utilWriteData(gzFile, soundSaveStructV3);
  1.1504 +}
  1.1505 +
  1.1506 +void soundReadGame(gzFile gzFile, int version)
  1.1507 +{
  1.1508 +	int32 oldSoundPaused = soundPaused;
  1.1509 +	int32 oldSoundEnableFlag = soundEnableFlag;
  1.1510 +	utilReadData(gzFile, soundSaveStruct);
  1.1511 +	soundPaused = oldSoundPaused;
  1.1512 +	soundEnableFlag = oldSoundEnableFlag;
  1.1513 +
  1.1514 +	if (version >= SAVE_GAME_VERSION_3)
  1.1515 +	{
  1.1516 +		utilReadData(gzFile, soundSaveStructV2);
  1.1517 +	}
  1.1518 +	else
  1.1519 +	{
  1.1520 +		sound3Bank		   = (ioMem[NR30] >> 6) & 1;
  1.1521 +		sound3DataSize	   = (ioMem[NR30] >> 5) & 1;
  1.1522 +		sound3ForcedOutput = (ioMem[NR32] >> 7) & 1;
  1.1523 +		// nothing better to do here...
  1.1524 +		memcpy(&sound3WaveRam[0x00], &ioMem[0x90], 0x10);
  1.1525 +		memcpy(&sound3WaveRam[0x10], &ioMem[0x90], 0x10);
  1.1526 +	}
  1.1527 +	soundBufferIndex = soundIndex * 2;
  1.1528 +
  1.1529 +	int quality = 1;
  1.1530 +	utilGzRead(gzFile, &quality, sizeof(int32));
  1.1531 +	soundSetQuality(quality);
  1.1532 +
  1.1533 +	sound1Wave = soundWavePattern[ioMem[NR11] >> 6];
  1.1534 +	sound2Wave = soundWavePattern[ioMem[NR21] >> 6];
  1.1535 +
  1.1536 +	//if(version >= SAVE_GAME_VERSION_14) {
  1.1537 +	//  utilReadData(gzFile, soundSaveStructV3);
  1.1538 +	//}
  1.1539 +	//else {
  1.1540 +	soundTicks		  = (soundtick_t) soundTicks_int32;
  1.1541 +	SOUND_CLOCK_TICKS = (soundtick_t) SOUND_CLOCK_TICKS_int32;
  1.1542 +	//}
  1.1543 +	soundDSBValue = (u8) (soundDSBValue_int32 & 0xff);
  1.1544 +}
  1.1545 +