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CDROM: Synthesize lead-out area and stop reading when reached

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This commit is contained in:
Connor McLaughlin
2020-05-08 10:50:22 +10:00
parent c67e877d82
commit 5b389ae13d
7 changed files with 54 additions and 10 deletions
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22
src/common/cd_image.cpp
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@ -168,8 +168,16 @@ bool CDImage::ReadRawSector(void* buffer)
}
else
{
// This in an implicit pregap. Return silence.
std::fill(static_cast<u8*>(buffer), static_cast<u8*>(buffer) + RAW_SECTOR_SIZE, u8(0));
if (m_current_index->track_number == LEAD_OUT_TRACK_NUMBER)
{
// Lead-out area.
std::fill(static_cast<u8*>(buffer), static_cast<u8*>(buffer) + RAW_SECTOR_SIZE, u8(0xAA));
}
else
{
// This in an implicit pregap. Return silence.
std::fill(static_cast<u8*>(buffer), static_cast<u8*>(buffer) + RAW_SECTOR_SIZE, u8(0));
}
}
m_position_on_disc++;
@ -246,6 +254,16 @@ void CDImage::GenerateSubChannelQ(SubChannelQ* subq, const Index* index, u32 ind
subq->crc = SubChannelQ::ComputeCRC(subq->data);
}
void CDImage::AddLeadOutIndex()
{
Index index = {};
index.start_lba_on_disc = m_lba_count;
index.length = LEAD_OUT_SECTOR_COUNT;
index.track_number = 0xAA;
index.index_number = 0;
m_indices.push_back(index);
}
u16 CDImage::SubChannelQ::ComputeCRC(const u8* data)
{
static constexpr std::array<u16, 256> crc16_table = {