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CDROM: Fix incorrect sector read after incomplete seek->read

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Fixes crash in Disney's The Lion King - Simba's Mighty Adventure.
This commit is contained in:
Connor McLaughlin 2020-06-26 17:15:39 +10:00
parent b8a2487abf
commit 737337a526
1 changed files with 12 additions and 1 deletions
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13
src/core/cdrom.cpp
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@ -1507,7 +1507,6 @@ void CDROM::ExecuteDrive(TickCount ticks_late)
void CDROM::BeginReading(TickCount ticks_late /* = 0 */, bool after_seek /* = false */) void CDROM::BeginReading(TickCount ticks_late /* = 0 */, bool after_seek /* = false */)
{ {
Log_DebugPrintf("Starting reading @ LBA %u", m_current_lba);
ClearSectorBuffers(); ClearSectorBuffers();
if (!after_seek && m_setloc_pending) if (!after_seek && m_setloc_pending)
@ -1516,6 +1515,18 @@ void CDROM::BeginReading(TickCount ticks_late /* = 0 */, bool after_seek /* = fa
return; return;
} }
// If we were seeking, we want to start reading from the seek target, not the current sector
// Fixes crash in Disney's The Lion King - Simba's Mighty Adventure.
if (IsSeeking())
{
Log_DevPrintf("Read command while seeking, scheduling read after seek %u -> %u finishes in %d ticks",
m_seek_start_lba, m_seek_end_lba, m_drive_event->GetTicksUntilNextExecution());
m_read_after_seek = true;
m_play_after_seek = false;
return;
}
Log_DebugPrintf("Starting reading @ LBA %u", m_current_lba);
m_secondary_status.ClearActiveBits(); m_secondary_status.ClearActiveBits();
m_secondary_status.motor_on = true; m_secondary_status.motor_on = true;