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CDROM: Support reading MODE1 sectors

This commit is contained in:
Stenzek 2024-09-07 16:05:53 +10:00
parent 185ea7e3f1
commit 66c9df342a
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1 changed files with 25 additions and 12 deletions
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37
src/core/cdrom.cpp
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@ -43,8 +43,8 @@ enum : u32
DATA_SECTOR_OUTPUT_SIZE = CDImage::DATA_SECTOR_SIZE,
SECTOR_SYNC_SIZE = CDImage::SECTOR_SYNC_SIZE,
SECTOR_HEADER_SIZE = CDImage::SECTOR_HEADER_SIZE,
XA_SUBHEADER_SIZE = 4,
MODE1_HEADER_SIZE = CDImage::MODE1_HEADER_SIZE,
MODE2_HEADER_SIZE = CDImage::MODE2_HEADER_SIZE,
XA_ADPCM_SAMPLES_PER_SECTOR_4BIT = 4032, // 28 words * 8 nibbles per word * 18 chunks
XA_ADPCM_SAMPLES_PER_SECTOR_8BIT = 2016, // 28 words * 4 bytes per word * 18 chunks
XA_RESAMPLE_RING_BUFFER_SIZE = 32,
@ -1505,6 +1505,9 @@ TickCount CDROM::GetTicksForSeek(CDImage::LBA new_lba, bool ignore_speed_change)
constexpr u32 ticks_per_second = static_cast<u32>(System::MASTER_CLOCK);
ticks += static_cast<u32>(seconds * static_cast<float>(ticks_per_second));
if (g_settings.cdrom_seek_speedup > 1)
ticks = std::max<u32>(ticks / g_settings.cdrom_seek_speedup, MIN_TICKS);
if (s_drive_state == DriveState::ChangingSpeedOrTOCRead && !ignore_speed_change)
{
// we're still reading the TOC, so add that time in
@ -1520,9 +1523,6 @@ TickCount CDROM::GetTicksForSeek(CDImage::LBA new_lba, bool ignore_speed_change)
(static_cast<float>(ticks) / static_cast<float>(ticks_per_second)) * 1000.0f);
}
if (g_settings.cdrom_seek_speedup > 1)
ticks = std::max<u32>(ticks / g_settings.cdrom_seek_speedup, MIN_TICKS);
return System::ScaleTicksToOverclock(static_cast<TickCount>(ticks));
}
@ -1857,7 +1857,7 @@ void CDROM::ExecuteCommand(void*, TickCount ticks, TickCount ticks_late)
{
SendErrorResponse(STAT_ERROR, ERROR_REASON_NOT_READY);
}
else if ((!IsMediaPS1Disc() || !DoesMediaRegionMatchConsole()) && !s_mode.cdda)
else if ((IsMediaAudioCD() || !DoesMediaRegionMatchConsole()) && !s_mode.cdda)
{
SendErrorResponse(STAT_ERROR, ERROR_REASON_INVALID_COMMAND);
}
@ -3128,19 +3128,32 @@ ALWAYS_INLINE_RELEASE void CDROM::ProcessDataSector(const u8* raw_sector, const
if (s_mode.read_raw_sector)
{
std::memcpy(sb->data.data(), raw_sector + SECTOR_SYNC_SIZE, RAW_SECTOR_OUTPUT_SIZE);
sb->size = RAW_SECTOR_OUTPUT_SIZE;
if (s_last_sector_header.sector_mode == 1)
{
// Raw reads in MODE1 appear to fill in a MODE2 header...
std::memcpy(&sb->data[0], raw_sector + SECTOR_SYNC_SIZE, MODE1_HEADER_SIZE);
std::memset(&sb->data[MODE1_HEADER_SIZE], 0, MODE2_HEADER_SIZE - MODE1_HEADER_SIZE);
std::memcpy(&sb->data[MODE2_HEADER_SIZE], raw_sector + SECTOR_SYNC_SIZE + MODE1_HEADER_SIZE,
DATA_SECTOR_OUTPUT_SIZE);
sb->size = MODE2_HEADER_SIZE + DATA_SECTOR_OUTPUT_SIZE;
}
else
{
std::memcpy(sb->data.data(), raw_sector + SECTOR_SYNC_SIZE, RAW_SECTOR_OUTPUT_SIZE);
sb->size = RAW_SECTOR_OUTPUT_SIZE;
}
}
else
{
// TODO: This should actually depend on the mode...
if (s_last_sector_header.sector_mode != 2)
if (s_last_sector_header.sector_mode != 1 && s_last_sector_header.sector_mode != 2)
{
WARNING_LOG("Ignoring non-mode2 sector at {}", s_current_lba);
WARNING_LOG("Ignoring non-MODE1/MODE2 sector at {}", s_current_lba);
return;
}
std::memcpy(sb->data.data(), raw_sector + CDImage::SECTOR_SYNC_SIZE + 12, DATA_SECTOR_OUTPUT_SIZE);
const u32 offset = (s_last_sector_header.sector_mode == 1) ? (SECTOR_SYNC_SIZE + MODE1_HEADER_SIZE) :
(SECTOR_SYNC_SIZE + MODE2_HEADER_SIZE);
std::memcpy(sb->data.data(), raw_sector + offset, DATA_SECTOR_OUTPUT_SIZE);
sb->size = DATA_SECTOR_OUTPUT_SIZE;
}