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SPU: Run muted voices when IRQ is enabled

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Fixes SPU timeout in Casper. We can still optimize for most games where
interrupts are not used by completely ignoring muted voices in those.
This commit is contained in:
Connor McLaughlin 2020-03-27 01:42:43 +10:00
parent 54abd37daa
commit 08ad5aad53
1 changed files with 21 additions and 11 deletions
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32
src/core/spu.cpp
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@ -1225,7 +1225,7 @@ void SPU::ReadADPCMBlock(u16 address, ADPCMBlock* block)
std::tuple<s32, s32> SPU::SampleVoice(u32 voice_index)
{
Voice& voice = m_voices[voice_index];
if (!voice.IsOn())
if (!voice.IsOn() && !m_SPUCNT.irq9_enable)
{
voice.last_volume = 0;
return {};
@ -1245,18 +1245,28 @@ std::tuple<s32, s32> SPU::SampleVoice(u32 voice_index)
}
}
// interpolate/sample and apply ADSR volume
s16 sample;
if (IsVoiceNoiseEnabled(voice_index))
sample = GetVoiceNoiseLevel();
else
sample = voice.Interpolate();
// skip interpolation when the volume is muted anyway
s32 volume;
if (voice.regs.adsr_volume != 0)
{
// interpolate/sample and apply ADSR volume
s16 sample;
if (IsVoiceNoiseEnabled(voice_index))
sample = GetVoiceNoiseLevel();
else
sample = voice.Interpolate();
volume = ApplyVolume(sample, voice.regs.adsr_volume);
}
else
{
volume = 0;
}
const s32 volume = ApplyVolume(sample, voice.regs.adsr_volume);
// if (voice_index == 3 || voice_index == 4)
// Log_WarningPrintf("voice %u %d", voice_index, volume);
voice.last_volume = volume;
voice.TickADSR();
if (voice.adsr_phase != ADSRPhase::Off)
voice.TickADSR();
// Pitch modulation
u16 step = voice.regs.adpcm_sample_rate;