//-------------------------------------------------------------------
// Name: ValidStateMatrix
// Description: Class-static matrix of operations vs states.
//
// If an entry is TRUE, the operation is valid from that state.
//-------------------------------------------------------------------
bool ValidStateMatrix(State stat, CAsyncOperation.StreamOperation so)
{
if (m_ValidStateMatrix == null)
{
m_ValidStateMatrix = new bool[(int)State.Count, (int)CAsyncOperation.StreamOperation.Op_Count];
// Note about states:
// 1. OnClockRestart should only be called from paused state.
// 2. While paused, the sink accepts samples but does not process them.
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpSetMediaType] = true;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpStart] = false;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpRestart] = false;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpPause] = false;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpStop] = false;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpProcessSample] = false;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpPlaceMarker] = false;
m_ValidStateMatrix[(int)State.TypeNotSet, (int)CAsyncOperation.StreamOperation.OpFinalize] = false;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpSetMediaType] = true;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpStart] = true;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpRestart] = false;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpPause] = true;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpStop] = true;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpProcessSample] = false;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpPlaceMarker] = true;
m_ValidStateMatrix[(int)State.Ready, (int)CAsyncOperation.StreamOperation.OpFinalize] = true;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpSetMediaType] = false;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpStart] = true;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpRestart] = false;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpPause] = true;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpStop] = true;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpProcessSample] = true;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpPlaceMarker] = true;
m_ValidStateMatrix[(int)State.Started, (int)CAsyncOperation.StreamOperation.OpFinalize] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpSetMediaType] = false;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpStart] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpRestart] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpPause] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpStop] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpProcessSample] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpPlaceMarker] = true;
m_ValidStateMatrix[(int)State.Paused, (int)CAsyncOperation.StreamOperation.OpFinalize] = true;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpSetMediaType] = false;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpStart] = true;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpRestart] = false;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpPause] = false;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpStop] = true;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpProcessSample] = false;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpPlaceMarker] = true;
m_ValidStateMatrix[(int)State.Stopped, (int)CAsyncOperation.StreamOperation.OpFinalize] = true;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpSetMediaType] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpStart] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpRestart] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpPause] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpStop] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpProcessSample] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpPlaceMarker] = false;
m_ValidStateMatrix[(int)State.Finalized, (int)CAsyncOperation.StreamOperation.OpFinalize] = false;
}
return m_ValidStateMatrix[(int)stat, (int)so];
}
//-------------------------------------------------------------------
// Name: ValidateOperation
// Description: Checks if an operation is valid in the current state.
//-------------------------------------------------------------------
void ValidateOperation(CAsyncOperation.StreamOperation op)
{
Debug.Assert(!m_IsShutdown);
bool bTransitionAllowed = ValidStateMatrix(m_state, op);
if (!bTransitionAllowed)
{
throw new COMException("Not valid from current state", MFError.MF_E_INVALIDREQUEST);
}
}
//-------------------------------------------------------------------
// Name: DispatchProcessSample
// Description: Complete a ProcessSample or PlaceMarker request.
//-------------------------------------------------------------------
void DispatchProcessSample(CAsyncOperation pOp)
{
Debug.Assert(pOp != null);
try
{
ProcessSamplesFromQueue(FlushState.WriteSamples);
// Ask for another sample
if (pOp.m_op == CAsyncOperation.StreamOperation.OpProcessSample)
{
QueueEvent(MediaEventType.MEStreamSinkRequestSample, Guid.Empty, 0, null);
}
}
catch (Exception e)
{
int hr = Marshal.GetHRForException(e);
// We are in the middle of an asynchronous operation, so if something failed, send an error.
QueueEvent(MediaEventType.MEError, Guid.Empty, hr, null);
}
}
//-------------------------------------------------------------------
// Name: QueueAsyncOperation
// Description: Puts an async operation on the work queue.
//-------------------------------------------------------------------
void QueueAsyncOperation(CAsyncOperation.StreamOperation op)
{
int hr;
CAsyncOperation pOp = new CAsyncOperation(op); // Created with ref count = 1
hr = MFExtern.MFPutWorkItem(m_WorkQueueId, this, pOp);
MFError.ThrowExceptionForHR(hr);
//SAFE_RELEASE(pOp);
}
//-------------------------------------------------------------------
// Name: DispatchFinalize
// Description: Complete a BeginFinalize request.
//-------------------------------------------------------------------
void DispatchFinalize(CAsyncOperation pOp)
{
int hr;
int cbSize = 0;
int cbWritten = 0;
try
{
WAV_FILE_HEADER header = new WAV_FILE_HEADER();
int cbFileSize = m_cbDataWritten + Marshal.SizeOf(typeof(WAV_FILE_HEADER)) - Marshal.SizeOf(typeof(RIFFCHUNK));
// Write any samples left in the queue...
ProcessSamplesFromQueue(FlushState.WriteSamples);
// Now we're done writing all of the audio data.
// Fill in the RIFF headers...
hr = MFExtern.MFCreateWaveFormatExFromMFMediaType(m_pCurrentType, out header.WaveFormat, out cbSize, MFWaveFormatExConvertFlags.Normal);
MFError.ThrowExceptionForHR(hr);
header.FileHeader = new RIFFCHUNK();
header.FileHeader.fcc = new FourCC('R', 'I', 'F', 'F');
header.FileHeader.cb = cbFileSize;
header.fccWaveType = new FourCC('W', 'A', 'V', 'E');
header.WaveHeader = new RIFFCHUNK();
header.WaveHeader.fcc = new FourCC('f', 'm', 't', ' ');
header.WaveHeader.cb = Marshal.SizeOf(typeof(WaveFormatEx));
header.DataHeader = new RIFFCHUNK();
header.DataHeader.fcc = new FourCC('d', 'a', 't', 'a');
header.DataHeader.cb = m_cbDataWritten;
// Move the file pointer back to the start of the file and write the
// RIFF headers.
hr = m_pByteStream.SetCurrentPosition(0);
MFError.ThrowExceptionForHR(hr);
IntPtr ip = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(WAV_FILE_HEADER)));
try
{
Marshal.StructureToPtr(header, ip, false);
hr = m_pByteStream.Write(ip, Marshal.SizeOf(typeof(WAV_FILE_HEADER)), out cbWritten);
MFError.ThrowExceptionForHR(hr);
}
finally
{
Marshal.FreeCoTaskMem(ip);
}
// Close the byte stream.
hr = m_pByteStream.Close();
MFError.ThrowExceptionForHR(hr);
hr = 0;
}
catch (Exception e)
{
hr = Marshal.GetHRForException(e);
}
// Set the async status and invoke the callback.
hr = m_pFinalizeResult.SetStatus(hr);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFInvokeCallback(m_pFinalizeResult);
MFError.ThrowExceptionForHR(hr);
}