private int ReverseReadAudio(byte[] buffer, int offset, int samplesRequested)
{
int totalSamplesWritten = 0;
int currentSamplesRequested = samplesRequested;
lock (_snapshots)
{
SnapshotInfo currentSnapshot = _snapshots.LastOrDefault();
while (totalSamplesWritten < samplesRequested && currentSnapshot != null)
{
int samplesWritten = currentSnapshot.AudioBuffer.Render16BitStereo(Volume, buffer, offset, currentSamplesRequested, true);
if (samplesWritten == 0)
{
_core.PushRequest(CoreRequest.RevertToSnapshot(currentSnapshot.Id, currentSnapshot));
_core.PushRequest(CoreRequest.DeleteSnapshot(currentSnapshot.Id));
_snapshots.RemoveAt(_snapshots.Count - 1);
currentSnapshot = _snapshots.LastOrDefault();
}
totalSamplesWritten += samplesWritten;
currentSamplesRequested -= samplesWritten;
offset += 4 * samplesWritten;
}
}
return(totalSamplesWritten);
}
static public CoreRequest CoreRequestFromBytes(MemoryByteStream stream)
{
byte type = stream.ReadByte();
switch (type)
{
case _coreActionKeyPress:
{
byte keyCode = stream.ReadByte();
bool keyDown = stream.ReadBool();
return(CoreRequest.KeyPress(keyCode, keyDown));
}
case _coreActionReset:
{
return(CoreRequest.Reset());
}
case _coreActionLoadDisc:
{
byte drive = stream.ReadByte();
byte[] media = stream.ReadArray();
return(CoreRequest.LoadDisc(drive, media));
}
case _coreActionLoadTape:
{
byte[] media = stream.ReadArray();
return(CoreRequest.LoadTape(media));
}
case _coreActionRunUntil:
{
UInt64 stopTicks = stream.ReadUInt64();
return(CoreRequest.RunUntil(stopTicks));
}
case _coreActionLoadCore:
{
byte[] state = stream.ReadArray();
return(CoreRequest.LoadCore(new MemoryBlob(state)));
}
case _coreActionCoreVersion:
{
Int32 version = stream.ReadInt32();
return(CoreRequest.CoreVersion(version));
}
case _coreActionCreateSnapshot:
{
Int32 snapshotId = stream.ReadInt32();
return(CoreRequest.CreateSnapshot(snapshotId));
}
case _coreActionDeleteSnapshot:
{
Int32 snapshotId = stream.ReadInt32();
return(CoreRequest.DeleteSnapshot(snapshotId));
}
case _coreActionRevertToSnapshot:
{
Int32 snapshotId = stream.ReadInt32();
return(CoreRequest.RevertToSnapshot(snapshotId, null));
}
default:
throw new Exception(String.Format("Unknown CoreRequest type {0}!", type));
}
}