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Fix the audio in sega rally2. The game has packed separate tracks into the left and right audio channels. Selecting the correct track fixes the garbled mess. (Spindizzi)

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This commit is contained in:
Ian Curtis 2019-02-01 21:02:02 +00:00
parent f634d19fdc
commit 90faeafbc4
2 changed files with 58 additions and 8 deletions
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61
Src/Model3/DSB.cpp
View file

@ -780,15 +780,23 @@ void CDSB2::WriteMPEGFIFO(UINT8 byte)
//mixer_set_stereo_pan(0, MIXER_PAN_RIGHT, MIXER_PAN_LEFT);
mpegState = ST_IDLE;
break;
/*
case ST_GOTA0:
// ch 0 mono
mixer_set_stereo_volume(0, 0, 255);
printf("ch 0 mono\n");
mixer_set_stereo_pan(0, MIXER_PAN_CENTER, MIXER_PAN_CENTER);
//mixer_set_stereo_volume(0, 0, 255);
//printf("ch 0 mono\n");
//mixer_set_stereo_pan(0, MIXER_PAN_CENTER, MIXER_PAN_CENTER);
if (byte == 0) {
audioChannel = AudioChannel::stereo;
}
else {
audioChannel = AudioChannel::channel0;
}
mpegState = ST_IDLE;
break;
*/
case ST_GOTA4: // dayto2pe plays advertise tune from this state by writing 0x75
mpegState = ST_IDLE;
if (byte == 0x75)
@ -810,10 +818,21 @@ void CDSB2::WriteMPEGFIFO(UINT8 byte)
//printf("ch 1 mono\n");
//mixer_set_stereo_volume(0, 255, 0);
//mixer_set_stereo_pan(0, MIXER_PAN_CENTER, MIXER_PAN_CENTER);
if (byte == 0) {
audioChannel = AudioChannel::stereo;
}
else {
audioChannel = AudioChannel::channel1;
}
mpegState = ST_IDLE;
break;
case ST_GOTB4:
mpegState = ST_IDLE;
if (byte == 0x96)
{
MPEG_StopPlaying();
playing = 0;
}
break;
case ST_GOTB5:
mpegState = ST_IDLE;
@ -831,19 +850,30 @@ void CDSB2::WriteMPEGFIFO(UINT8 byte)
* when only setting two (in-game)
*/
case ST_GOTB6: // rear left(?) volume
volume[0] = byte;
mpegState = ST_IDLE;
break;
case ST_GOTB0: // left volume
volume[0] = byte;
//printf("Set L Volume: %02X\n", byte);
mpegState = ST_IDLE;
break;
case ST_GOTA7: // rear right(?) volume
volume[1] = byte;
mpegState = ST_IDLE;
break;
case ST_GOTA1: // right volume
case ST_GOTA0:
volume[1] = byte;
mpegState = ST_IDLE;
break;
/*case ST_GOTA0:
volume[1] = byte;
//printf("Set R Volume: %02X\n", byte);
mpegState = ST_IDLE;
break;
break;*/
case ST_GOTB2:
mpegState = ST_IDLE;
break;
case ST_GOTA3:
mpegState = ST_IDLE;
break;
@ -1016,7 +1046,23 @@ void CDSB2::RunFrame(INT16 *audioL, INT16 *audioR)
// Decode MPEG for this frame
INT16 *mpegFill[2] = { &mpegL[retainedSamples], &mpegR[retainedSamples] };
MPEG_Decode(mpegFill, 32000/60-retainedSamples+2);
//retainedSamples = Resampler.UpSampleAndMix(audioL, audioR, mpegL, mpegR, volume[0], volume[1], 44100/60, 32000/60+2, 44100, 32000);
switch (audioChannel)
{
case AudioChannel::stereo:
retainedSamples = Resampler.UpSampleAndMix(audioL, audioR, mpegL, mpegR, volume[0], volume[1], 44100 / 60, 32000 / 60 + 2, 44100, 32000);
break;
case AudioChannel::channel0:
retainedSamples = Resampler.UpSampleAndMix(audioL, audioR, mpegR, mpegR, volume[0], volume[0], 44100 / 60, 32000 / 60 + 2, 44100, 32000);
break;
case AudioChannel::channel1:
retainedSamples = Resampler.UpSampleAndMix(audioL, audioR, mpegL, mpegL, volume[1], volume[1], 44100 / 60, 32000 / 60 + 2, 44100, 32000);
break;
default:
//retainedSamples = Resampler.UpSampleAndMix(audioL, audioR, mpegL, mpegR, volume[0], volume[1], 44100 / 60, 32000 / 60 + 2, 44100, 32000);
break;
}
}
void CDSB2::Reset(void)
@ -1173,6 +1219,7 @@ bool CDSB2::Init(const UINT8 *progROMPtr, const UINT8 *mpegROMPtr)
M68KSetIRQCallback(NULL); // use default behavior (autovector, clear interrupt)
M68KGetContext(&M68K);
// MPEG decoder
if (OKAY != MPEG_Init())
return ErrorLog("Insufficient memory to initialize MPEG decoder.");

3
Src/Model3/DSB.h
View file

@ -308,6 +308,9 @@ private:
// M68K CPU
M68KCtx M68K;
enum class AudioChannel { stereo, channel0, channel1 };
AudioChannel audioChannel = AudioChannel::stereo;
};