Function MixVoice

pcsx2/SPU2/Mixer.cpp:371–421

static __forceinline StereoOut32 MixVoice(uint coreidx, uint voiceidx)
{
	V_Core& thiscore(Cores[coreidx]);
	V_Voice& vc(thiscore.Voices[voiceidx]);

	// Most games don't use much volume slide effects.  So only call the UpdateVolume
	// methods when needed by checking the flag outside the method here...
	// (Note: Ys 6 : Ark of Nephistm uses these effects)

	vc.Volume.Update();

	DecodeSamples(coreidx, voiceidx);

	StereoOut32 voiceOut(0, 0);
	s32 Value = 0;

	if (vc.ADSR.Phase > V_ADSR::PHASE_STOPPED)
	{
		if (vc.Noise)
			Value = GetNoiseValues(thiscore);
		else
			Value = GetVoiceValues(thiscore, voiceidx);

		// Update and Apply ADSR  (applies to normal and noise sources)

		CalculateADSR(thiscore, voiceidx);
		Value = ApplyVolume(Value, vc.ADSR.Value);
		vc.OutX = Value;

		if (IsDevBuild)
			DebugCores[coreidx].Voices[voiceidx].displayPeak = std::max(DebugCores[coreidx].Voices[voiceidx].displayPeak, (s32)vc.OutX);

		voiceOut = ApplyVolume(StereoOut32(Value, Value), vc.Volume);
	}

	// SPU2 Note: The spu2 continues to process voices for eternity, always, so we
	// have to run through all the motions of updating the voice regardless of it's
	// audible status.  Otherwise IRQs might not trigger and emulation might fail.

	UpdatePitch(coreidx, voiceidx);

	ConsumeSamples(thiscore, voiceidx);

	// Write-back of raw voice data (post ADSR applied)
	if (voiceidx == 1)
		spu2M_WriteFast(((0 == coreidx) ? 0x400 : 0xc00) + OutPos, Value);
	else if (voiceidx == 3)
		spu2M_WriteFast(((0 == coreidx) ? 0x600 : 0xe00) + OutPos, Value);

	return voiceOut;
}

static __forceinline void MixCoreVoices(VoiceMixSet& dest, const uint coreidx)
{