//-------------------------------------------------------------------
// Name: ProcessSamplesFromQueue
// Description:
//
// Removes all of the samples and markers that are currently in the
// queue and processes them.
//
// If bFlushData = DropSamples:
// For each marker, send an MEStreamSinkMarker event, with hr = E_ABORT.
// For each sample, drop the sample.
//
// If bFlushData = WriteSamples
// For each marker, send an MEStreamSinkMarker event, with hr = S_OK.
// For each sample, write the sample to the file.
//
// This method is called when we flush, stop, restart, receive a new
// sample, or receive a marker.
//-------------------------------------------------------------------
void ProcessSamplesFromQueue(FlushState bFlushData)
{
// Enumerate all of the samples/markers in the queue.
while (m_SampleQueue.Count > 0)
{
object pUnk = null;
IMarker pMarker = null;
IMFSample pSample = null;
pUnk = m_SampleQueue.Dequeue();
// Figure out if this is a marker or a sample.
pMarker = pUnk as IMarker;
if (pMarker == null)
{
// If this is a sample, write it to the file.
pSample = (IMFSample)pUnk;
}
try
{
// Now handle the sample/marker appropriately.
if (pMarker != null)
{
SendMarkerEvent(pMarker, bFlushData);
}
else
{
Debug.Assert(pSample != null); // Not a marker, must be a sample
if (bFlushData == FlushState.WriteSamples)
{
WriteSampleToFile(pSample);
}
}
}
finally
{
//SAFE_RELEASE(pUnk);
SafeRelease(pMarker);
SafeRelease(pSample);
}
} // while loop
}
//-------------------------------------------------------------------
// Name: SendMarkerEvent
// Description: Saned a marker event.
//
// pMarker: Pointer to our custom IMarker interface, which holds
// the marker information.
//-------------------------------------------------------------------
void SendMarkerEvent(IMarker pMarker, FlushState fs)
{
int hrStatus = 0; // Status code for marker event.
if (fs == FlushState.DropSamples)
{
hrStatus = E_Abort;
}
PropVariant var = new PropVariant();
// Get the context data.
pMarker.GetContext(var);
QueueEvent(MediaEventType.MEStreamSinkMarker, Guid.Empty, hrStatus, var);
var.Clear();
}
private void InitFlushState(bool onlyDocStore)
{
lock (this)
{
InitSegmentName(onlyDocStore);
if (flushState == null)
{
flushState = new FlushState();
flushState.directory = directory;
flushState.docWriter = this;
}
flushState.docStoreSegmentName = docStoreSegment;
flushState.segmentName = segment;
flushState.numDocsInRAM = numDocsInRAM;
flushState.numDocsInStore = numDocsInStore;
flushState.flushedFiles = new System.Collections.Generic.Dictionary<string,string>();
}
}
