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Zelda HLE: Fix reverb in the GC IPL. 

Adds a missing destination buffer, and support post-filtering.
This commit is contained in:
Pierre Bourdon 2014-12-22 05:43:35 +01:00
parent 13ea54628d
commit 8c85a8c8d9
2 changed files with 21 additions and 13 deletions
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33
Source/Core/Core/HW/DSPHLE/UCodes/Zelda.cpp
View File

@ -814,16 +814,22 @@ void ZeldaAudioRenderer::ApplyReverb(bool post_rendering)
for (u16 i = 0; i < 8; ++i)
(*last8_samples_buffers[rpb_idx])[i] = buffer[0x50 + i];
// Filter the buffer using provided coefficients.
for (u16 i = 0; i < 0x50; ++i)
{
s32 sample = 0;
for (u16 j = 0; j < 8; ++j)
sample += (s32)buffer[i + j] * rpb.filter_coeffs[j];
sample >>= 15;
MathUtil::Clamp(&sample, -0x8000, 0x7fff);
buffer[i] = sample;
}
auto ApplyFilter = [&]() {
// Filter the buffer using provided coefficients.
for (u16 i = 0; i < 0x50; ++i)
{
s32 sample = 0;
for (u16 j = 0; j < 8; ++j)
sample += (s32)buffer[i + j] * rpb.filter_coeffs[j];
sample >>= 15;
MathUtil::Clamp(&sample, -0x8000, 0x7fff);
buffer[i] = sample;
}
};
// LSB set -> pre-filtering.
if (rpb.enabled & 1)
ApplyFilter();
for (const auto& dest : rpb.dest)
{
@ -840,10 +846,9 @@ void ZeldaAudioRenderer::ApplyReverb(bool post_rendering)
0x50, dest.volume);
}
// TODO: If "enabled" & 2, the filtering should be done post and
// not pre mixing.
// LSB not set, bit 1 set -> post-filtering.
if (rpb.enabled & 2)
PanicAlert("RPB wants post filtering.");
ApplyFilter();
for (u16 i = 0; i < 0x50; ++i)
(*reverb_buffers[rpb_idx])[i] = buffer[i];
@ -876,6 +881,7 @@ ZeldaAudioRenderer::MixingBuffer* ZeldaAudioRenderer::BufferForID(u16 buffer_id)
case 0x0C50: return &m_buf_back_right_reverb;
case 0x0DC0: return &m_buf_unk0_reverb;
case 0x0E20: return &m_buf_unk1_reverb;
case 0x09A0: return &m_buf_unk0; // Used by the GC IPL as a reverb dest.
default: return nullptr;
}
}
@ -1501,6 +1507,7 @@ void ZeldaAudioRenderer::DoState(PointerWrap& p)
p.Do(m_buf_back_right_reverb);
p.Do(m_buf_unk0_reverb);
p.Do(m_buf_unk1_reverb);
p.Do(m_buf_unk0);
p.Do(m_resampling_coeffs);
p.Do(m_const_patterns);

1
Source/Core/Core/HW/DSPHLE/UCodes/Zelda.h
View File

@ -117,6 +117,7 @@ private:
MixingBuffer m_buf_back_right_reverb{};
MixingBuffer m_buf_unk0_reverb{};
MixingBuffer m_buf_unk1_reverb{};
MixingBuffer m_buf_unk0{};
// Maps a buffer "ID" (really, their address in the DSP DRAM...) to our
// buffers. Returns nullptr if no match is found.