mirror of https://github.com/mgba-emu/mgba.git
GBA Audio: Sample FIFOs at SOUNDBIAS-set frequency
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29dbb55c80
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1
CHANGES
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@ -29,6 +29,7 @@ Emulation fixes:
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- GBA: Fix expected entry point for multiboot ELFs (fixes mgba.io/i/2450)
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- GBA: Fix expected entry point for multiboot ELFs (fixes mgba.io/i/2450)
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- GBA: Fix booting multiboot ROMs with no JOY entrypoint
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- GBA: Fix booting multiboot ROMs with no JOY entrypoint
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- GBA Audio: Adjust PSG sampling rate with SOUNDBIAS
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- GBA Audio: Adjust PSG sampling rate with SOUNDBIAS
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- GBA Audio: Sample FIFOs at SOUNDBIAS-set frequency
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- GBA BIOS: Work around IRQ handling hiccup in Mario & Luigi (fixes mgba.io/i/1059)
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- GBA BIOS: Work around IRQ handling hiccup in Mario & Luigi (fixes mgba.io/i/1059)
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- GBA BIOS: Initial HLE timing estimation of UnLz77 functions (fixes mgba.io/i/2141)
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- GBA BIOS: Initial HLE timing estimation of UnLz77 functions (fixes mgba.io/i/2141)
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- GBA DMA: Fix DMA source direction bits being cleared (fixes mgba.io/i/2410)
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- GBA DMA: Fix DMA source direction bits being cleared (fixes mgba.io/i/2410)
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@ -34,7 +34,7 @@ struct GBAAudioFIFO {
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uint32_t internalSample;
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uint32_t internalSample;
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int internalRemaining;
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int internalRemaining;
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int dmaSource;
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int dmaSource;
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int8_t sample;
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int8_t samples[8];
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};
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};
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DECL_BITFIELD(GBARegisterSOUNDCNT_HI, uint16_t);
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DECL_BITFIELD(GBARegisterSOUNDCNT_HI, uint16_t);
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@ -224,7 +224,10 @@ mLOG_DECLARE_CATEGORY(GBA_STATE);
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* 0x00320 - 0x00323: Next IRQ event
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* 0x00320 - 0x00323: Next IRQ event
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* 0x00324 - 0x00327: Interruptable BIOS stall cycles
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* 0x00324 - 0x00327: Interruptable BIOS stall cycles
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* 0x00328 - 0x00367: Matrix memory mapping table
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* 0x00328 - 0x00367: Matrix memory mapping table
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* 0x00368 - 0x003FF: Reserved (leave zero)
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* 0x00368 - 0x0036F: Reserved (leave zero)
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* 0x00370 - 0x00377: Audio FIFO A samples
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* 0x00378 - 0x0037F: Audio FIFO B samples
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* 0x00380 - 0x003FF: Reserved (leave zero)
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* 0x00400 - 0x007FF: I/O memory
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* 0x00400 - 0x007FF: I/O memory
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* 0x00800 - 0x00BFF: Palette
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* 0x00800 - 0x00BFF: Palette
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* 0x00C00 - 0x00FFF: OAM
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* 0x00C00 - 0x00FFF: OAM
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@ -381,8 +384,14 @@ struct GBASerializedState {
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int32_t biosStall;
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int32_t biosStall;
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uint32_t matrixMappings[16];
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uint32_t matrixMappings[16];
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uint32_t reservedMatrix[2];
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uint32_t reserved[38];
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struct {
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int8_t chA[8];
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int8_t chB[8];
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} samples;
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uint32_t reserved[32];
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uint16_t io[SIZE_IO >> 1];
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uint16_t io[SIZE_IO >> 1];
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uint16_t pram[SIZE_PALETTE_RAM >> 1];
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uint16_t pram[SIZE_PALETTE_RAM >> 1];
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@ -67,13 +67,16 @@ void GBAAudioReset(struct GBAAudio* audio) {
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audio->chA.internalSample = 0;
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audio->chA.internalSample = 0;
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audio->chA.internalRemaining = 0;
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audio->chA.internalRemaining = 0;
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memset(audio->chA.fifo, 0, sizeof(audio->chA.fifo));
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memset(audio->chA.fifo, 0, sizeof(audio->chA.fifo));
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audio->chA.sample = 0;
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audio->chB.fifoWrite = 0;
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audio->chB.fifoWrite = 0;
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audio->chB.fifoRead = 0;
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audio->chB.fifoRead = 0;
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audio->chB.internalSample = 0;
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audio->chB.internalSample = 0;
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audio->chB.internalRemaining = 0;
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audio->chB.internalRemaining = 0;
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memset(audio->chB.fifo, 0, sizeof(audio->chB.fifo));
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memset(audio->chB.fifo, 0, sizeof(audio->chB.fifo));
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audio->chB.sample = 0;
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int i;
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for (i = 0; i < 8; ++i) {
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audio->chA.samples[i] = 0;
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audio->chB.samples[i] = 0;
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}
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audio->sampleRate = 0x8000;
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audio->sampleRate = 0x8000;
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audio->soundbias = 0x200;
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audio->soundbias = 0x200;
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audio->volume = 0;
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audio->volume = 0;
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@ -301,7 +304,17 @@ void GBAAudioSampleFIFO(struct GBAAudio* audio, int fifoId, int32_t cycles) {
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channel->fifoRead = 0;
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channel->fifoRead = 0;
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}
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}
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}
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}
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channel->sample = channel->internalSample;
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int32_t until = mTimingUntil(&audio->p->timing, &audio->sampleEvent) - 1;
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int bits = 1 << GBARegisterSOUNDBIASGetResolution(audio->soundbias);
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until += 1 << (9 - GBARegisterSOUNDBIASGetResolution(audio->soundbias));
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until >>= 9 - GBARegisterSOUNDBIASGetResolution(audio->soundbias);
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int i;
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for (i = bits - until; i < bits; ++i) {
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if (i < 0 || i >= bits) {
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abort();
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}
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channel->samples[i] = channel->internalSample;
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}
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if (channel->internalRemaining) {
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if (channel->internalRemaining) {
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channel->internalSample >>= 8;
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channel->internalSample >>= 8;
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--channel->internalRemaining;
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--channel->internalRemaining;
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@ -339,21 +352,21 @@ static void _sample(struct mTiming* timing, void* user, uint32_t cyclesLate) {
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if (!audio->externalMixing) {
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if (!audio->externalMixing) {
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if (!audio->forceDisableChA) {
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if (!audio->forceDisableChA) {
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if (audio->chALeft) {
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if (audio->chALeft) {
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sampleLeft += (audio->chA.sample << 2) >> !audio->volumeChA;
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sampleLeft += (audio->chA.samples[sample] << 2) >> !audio->volumeChA;
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}
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}
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if (audio->chARight) {
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if (audio->chARight) {
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sampleRight += (audio->chA.sample << 2) >> !audio->volumeChA;
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sampleRight += (audio->chA.samples[sample] << 2) >> !audio->volumeChA;
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}
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}
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}
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}
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if (!audio->forceDisableChB) {
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if (!audio->forceDisableChB) {
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if (audio->chBLeft) {
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if (audio->chBLeft) {
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sampleLeft += (audio->chB.sample << 2) >> !audio->volumeChB;
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sampleLeft += (audio->chB.samples[sample] << 2) >> !audio->volumeChB;
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}
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}
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if (audio->chBRight) {
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if (audio->chBRight) {
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sampleRight += (audio->chB.sample << 2) >> !audio->volumeChB;
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sampleRight += (audio->chB.samples[sample] << 2) >> !audio->volumeChB;
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}
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}
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}
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}
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}
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}
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@ -364,12 +377,19 @@ static void _sample(struct mTiming* timing, void* user, uint32_t cyclesLate) {
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samplesRight[sample] = sampleRight;
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samplesRight[sample] = sampleRight;
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}
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}
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memset(audio->chA.samples, audio->chA.samples[sample - 1], sizeof(audio->chA.samples));
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memset(audio->chB.samples, audio->chB.samples[sample - 1], sizeof(audio->chB.samples));
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mCoreSyncLockAudio(audio->p->sync);
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mCoreSyncLockAudio(audio->p->sync);
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unsigned produced;
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unsigned produced;
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int32_t sampleSumLeft = 0;
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int32_t sampleSumRight = 0;
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int i;
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int i;
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for (i = 0; i < sample; ++i) {
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for (i = 0; i < sample; ++i) {
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int16_t sampleLeft = samplesLeft[i];
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int16_t sampleLeft = samplesLeft[i];
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int16_t sampleRight = samplesRight[i];
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int16_t sampleRight = samplesRight[i];
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sampleSumLeft += sampleLeft;
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sampleSumRight += sampleRight;
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if ((size_t) blip_samples_avail(audio->psg.left) < audio->samples) {
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if ((size_t) blip_samples_avail(audio->psg.left) < audio->samples) {
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blip_add_delta(audio->psg.left, audio->clock, sampleLeft - audio->lastLeft);
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blip_add_delta(audio->psg.left, audio->clock, sampleLeft - audio->lastLeft);
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blip_add_delta(audio->psg.right, audio->clock, sampleRight - audio->lastRight);
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blip_add_delta(audio->psg.right, audio->clock, sampleRight - audio->lastRight);
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@ -385,7 +405,9 @@ static void _sample(struct mTiming* timing, void* user, uint32_t cyclesLate) {
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}
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}
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// TODO: Post all frames
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// TODO: Post all frames
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if (audio->p->stream && audio->p->stream->postAudioFrame) {
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if (audio->p->stream && audio->p->stream->postAudioFrame) {
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audio->p->stream->postAudioFrame(audio->p->stream, samplesLeft[sample - 1], samplesRight[sample - 1]);
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sampleSumLeft /= sample;
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sampleSumRight /= sample;
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audio->p->stream->postAudioFrame(audio->p->stream, sampleSumLeft, sampleSumRight);
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}
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}
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produced = blip_samples_avail(audio->psg.left);
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produced = blip_samples_avail(audio->psg.left);
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bool wait = produced >= audio->samples;
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bool wait = produced >= audio->samples;
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@ -406,8 +428,8 @@ void GBAAudioSerialize(const struct GBAAudio* audio, struct GBASerializedState*
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STORE_32(audio->chA.internalSample, 0, &state->audio.internalA);
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STORE_32(audio->chA.internalSample, 0, &state->audio.internalA);
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STORE_32(audio->chB.internalSample, 0, &state->audio.internalB);
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STORE_32(audio->chB.internalSample, 0, &state->audio.internalB);
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state->audio.sampleA = audio->chA.sample;
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memcpy(state->samples.chA, audio->chA.samples, sizeof(audio->chA.samples));
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state->audio.sampleB = audio->chB.sample;
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memcpy(state->samples.chB, audio->chB.samples, sizeof(audio->chB.samples));
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int readA = audio->chA.fifoRead;
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int readA = audio->chA.fifoRead;
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int readB = audio->chB.fifoRead;
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int readB = audio->chB.fifoRead;
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@ -453,8 +475,8 @@ void GBAAudioDeserialize(struct GBAAudio* audio, const struct GBASerializedState
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LOAD_32(audio->chA.internalSample, 0, &state->audio.internalA);
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LOAD_32(audio->chA.internalSample, 0, &state->audio.internalA);
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LOAD_32(audio->chB.internalSample, 0, &state->audio.internalB);
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LOAD_32(audio->chB.internalSample, 0, &state->audio.internalB);
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audio->chA.sample = state->audio.sampleA;
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memcpy(audio->chA.samples, state->samples.chA, sizeof(audio->chA.samples));
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audio->chB.sample = state->audio.sampleB;
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memcpy(audio->chB.samples, state->samples.chB, sizeof(audio->chB.samples));
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int readA = 0;
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int readA = 0;
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int readB = 0;
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int readB = 0;
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