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Zelda HLE: Implement LQ AFC decoding (samples source 0005).

This commit is contained in:
Pierre Bourdon 2014-12-24 03:29:26 +01:00
parent b3a327f02b
commit 82689677d9
1 changed files with 18 additions and 2 deletions
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20
Source/Core/Core/HW/DSPHLE/UCodes/Zelda.cpp
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@ -664,6 +664,9 @@ struct ZeldaAudioRenderer::VPB
SRC_CONST_PATTERN_1 = 4,
SRC_CONST_PATTERN_2 = 11,
SRC_CONST_PATTERN_3 = 12,
// Samples stored in ARAM at a rate of 16 samples/5 bytes, AFC encoded,
// at an arbitrary sample rate (resampling is applied).
SRC_AFC_LQ_FROM_ARAM = 5,
// Samples stored in ARAM in PCM8 format, at an arbitrary sampling rate
// (resampling is applied).
SRC_PCM8_FROM_ARAM = 8,
@ -1248,6 +1251,7 @@ void ZeldaAudioRenderer::LoadInputSamples(MixingBuffer* buffer, VPB* vpb)
break;
case VPB::SRC_AFC_HQ_FROM_ARAM:
case VPB::SRC_AFC_LQ_FROM_ARAM:
DownloadAFCSamplesFromARAM(raw_input_samples.data() + 4, vpb,
NeededRawSamplesCount(*vpb));
Resample(vpb, raw_input_samples.data(), buffer);
@ -1520,13 +1524,25 @@ void ZeldaAudioRenderer::DecodeAFC(VPB* vpb, s16* dst, size_t block_count)
for (auto& nibble : nibbles)
{
if (nibble >= 8)
nibble = nibble - 16;
nibble -= 16;
nibble <<= 11;
}
}
else
{
// TODO: LQ samples.
for (size_t i = 0; i < 16; i += 4)
{
nibbles[i + 0] = (*src >> 6) & 3;
nibbles[i + 1] = (*src >> 4) & 3;
nibbles[i + 2] = (*src >> 2) & 3;
nibbles[i + 3] = (*src >> 6) & 3;
}
for (auto& nibble : nibbles)
{
if (nibble >= 2)
nibble -= 4;
nibble <<= 13;
}
}
s32 yn1 = *vpb->AFCYN1(), yn2 = *vpb->AFCYN2();