//-------------------------------------------------------------------
// Name: Shutdown
// Description: Shuts down the stream sink.
//-------------------------------------------------------------------
public void Shutdown()
{
int hr;
Debug.Assert(!m_IsShutdown);
GC.SuppressFinalize(this);
if (m_pEventQueue != null)
{
hr = m_pEventQueue.Shutdown();
MFError.ThrowExceptionForHR(hr);
}
hr = MFExtern.MFUnlockWorkQueue(m_WorkQueueId);
MFError.ThrowExceptionForHR(hr);
m_SampleQueue.Clear();
SafeRelease(m_pSink);
SafeRelease(m_pEventQueue);
SafeRelease(m_pByteStream);
SafeRelease(m_pCurrentType);
SafeRelease(m_pFinalizeResult);
m_pSink = null;
m_pEventQueue = null;
m_pByteStream = null;
m_pCurrentType = null;
m_pFinalizeResult = null;
m_IsShutdown = true;
}
int m_WorkQueueId; // ID of the work queue for asynchronous operations.
#endregion Fields
#region Constructors
public CWavStream(CWavSink pParent, IMFByteStream pByteStream)
{
int hr;
TRACE("CWavStream::CWavStream");
m_SampleQueue = new Queue();
m_state = State.TypeNotSet;
m_IsShutdown = false;
m_pSink = null;
m_pEventQueue = null;
m_pByteStream = null;
m_pCurrentType = null;
m_pFinalizeResult = null;
m_StartTime = 0;
m_cbDataWritten = 0;
m_WorkQueueId = 0;
Debug.Assert(pParent != null);
Debug.Assert(pByteStream != null);
MFByteStreamCapabilities dwCaps = MFByteStreamCapabilities.None;
const MFByteStreamCapabilities dwRequiredCaps = (MFByteStreamCapabilities.IsWritable | MFByteStreamCapabilities.IsSeekable);
// Make sure the byte stream has the necessary caps bits.
hr = pByteStream.GetCapabilities(out dwCaps);
MFError.ThrowExceptionForHR(hr);
if ((dwCaps & dwRequiredCaps) != dwRequiredCaps)
{
throw new COMException("stream doesn't have required caps", E_Fail);
}
// Move the file pointer to leave room for the RIFF headers.
hr = pByteStream.SetCurrentPosition(Marshal.SizeOf(typeof(WAV_FILE_HEADER)));
MFError.ThrowExceptionForHR(hr);
// Create the event queue helper.
hr = MFExternAlt.MFCreateEventQueue(out m_pEventQueue);
MFError.ThrowExceptionForHR(hr);
// Allocate a new work queue for async operations.
hr = MFExtern.MFAllocateWorkQueue(out m_WorkQueueId);
MFError.ThrowExceptionForHR(hr);
m_pByteStream = pByteStream;
m_pSink = pParent;
}
public void Dispose()
{
TRACE("CWavStream::Dispose");
SafeRelease(m_pEventQueue);
SafeRelease(m_pByteStream);
SafeRelease(m_pCurrentType);
SafeRelease(m_pFinalizeResult);
m_pEventQueue = null;
m_pByteStream = null;
m_pCurrentType = null;
m_pFinalizeResult = null;
//m_pSink.Dispose(); // break deadly embrace
m_pSink = null;
GC.SuppressFinalize(this);
}
