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CDROM: Handle audio sectors in 2X mode 

Fixes menu background in 360 Three Sixty.
This commit is contained in:
Stenzek 2024-07-17 18:15:54 +10:00
parent 44b9d16d9f
commit 9392c19a70
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1 changed files with 6 additions and 3 deletions
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9
src/core/cdrom.cpp
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@ -3302,8 +3302,10 @@ ALWAYS_INLINE_RELEASE void CDROM::ProcessCDDASector(const u8* raw_sector, const
SPU::GeneratePendingSamples();
constexpr bool is_stereo = true;
constexpr u32 num_samples = CDImage::RAW_SECTOR_SIZE / sizeof(s16) / (is_stereo ? 2 : 1);
// 2 samples per channel, always stereo.
// Apparently in 2X mode, only half the samples in a sector get processed.
// Test cast: Menu background sound in 360 Three Sixty.
const u32 num_samples = (CDImage::RAW_SECTOR_SIZE / sizeof(s16)) / (s_mode.double_speed ? 4 : 2);
const u32 remaining_space = s_audio_fifo.GetSpace();
if (remaining_space < num_samples)
{
@ -3312,12 +3314,13 @@ ALWAYS_INLINE_RELEASE void CDROM::ProcessCDDASector(const u8* raw_sector, const
}
const u8* sector_ptr = raw_sector;
const size_t step = s_mode.double_speed ? (sizeof(s16) * 4) : (sizeof(s16) * 2);
for (u32 i = 0; i < num_samples; i++)
{
s16 samp_left, samp_right;
std::memcpy(&samp_left, sector_ptr, sizeof(samp_left));
std::memcpy(&samp_right, sector_ptr + sizeof(s16), sizeof(samp_right));
sector_ptr += sizeof(s16) * 2;
sector_ptr += step;
AddCDAudioFrame(samp_left, samp_right);
}
}