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CDROM: Cancel speed changes if they're not complete

This commit is contained in:
Connor McLaughlin 2021-06-19 15:01:42 +10:00
parent b1776dea61
commit 2c19c7ce57
1 changed files with 24 additions and 13 deletions
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37
src/core/cdrom.cpp
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@ -1020,23 +1020,34 @@ void CDROM::ExecuteCommand(TickCount ticks_late)
SendACKAndStat();
EndCommand();
if (speed_change && m_drive_state != DriveState::SeekingImplicit &&
m_drive_state != DriveState::ChangingSpeedOrTOCRead)
if (speed_change)
{
// if we're seeking or reading, we need to add time to the current seek/read
const TickCount change_ticks = GetTicksForSpeedChange();
if (m_drive_state != DriveState::Idle)
if (m_drive_state == DriveState::ChangingSpeedOrTOCRead)
{
Log_DevPrintf("Drive is %s, delaying event by %d ticks for speed change to %s-speed",
s_drive_state_names[static_cast<u8>(m_drive_state)], change_ticks,
m_mode.double_speed ? "double" : "single");
m_drive_event->Delay(change_ticks);
// cancel the speed change if it's less than a quarter complete
if (m_drive_event->GetTicksUntilNextExecution() >= (GetTicksForSpeedChange() / 4))
{
Log_DevPrintf("Cancelling speed change event");
ClearDriveState();
}
}
else
else if (m_drive_state != DriveState::SeekingImplicit)
{
Log_DevPrintf("Drive is idle, speed change takes %d ticks", change_ticks);
m_drive_state = DriveState::ChangingSpeedOrTOCRead;
m_drive_event->Schedule(change_ticks);
// if we're seeking or reading, we need to add time to the current seek/read
const TickCount change_ticks = GetTicksForSpeedChange();
if (m_drive_state != DriveState::Idle)
{
Log_DevPrintf("Drive is %s, delaying event by %d ticks for speed change to %s-speed",
s_drive_state_names[static_cast<u8>(m_drive_state)], change_ticks,
m_mode.double_speed ? "double" : "single");
m_drive_event->Delay(change_ticks);
}
else
{
Log_DevPrintf("Drive is idle, speed change takes %d ticks", change_ticks);
m_drive_state = DriveState::ChangingSpeedOrTOCRead;
m_drive_event->Schedule(change_ticks);
}
}
}