protected override void DoStartRendererWithHint(RenderingStartHint startHint)
{
if (renderMediaName == null || renderMediaName.Length <= 0)
{
return;
}
GC.Collect();
InitMedia();
int hr = mediaPosition.put_Rate(1);
DsError.ThrowExceptionForHR(hr);
// Run the graph to play the media file
hr = mediaControl.Run();
DsError.ThrowExceptionForHR(hr);
// HACK: call GetMedialenght once here to ensure that durationScaleFactor is buuilt up
double len = GetMediaLength();
}
protected override void DoStopInternal(object state)
{
IFilterGraph graph = mediaControl as IFilterGraph;
if (graph != null)
{
if (mediaControl != null)
{
int hr = mediaControl.Stop();
DsError.ThrowExceptionForHR(hr);
mediaControl = null;
}
IEnumFilters pEnum = null;
if (COMHelper.SUCCEEDED(graph.EnumFilters(out pEnum)) && pEnum != null)
{
List <IBaseFilter> allFilters = new List <IBaseFilter>();
IBaseFilter[] aFilters = new IBaseFilter[1];
while (COMHelper.S_OK == pEnum.Next(1, aFilters, IntPtr.Zero))
{
allFilters.Add(aFilters[0]);
}
Marshal.ReleaseComObject(pEnum);
foreach (var f in allFilters)
{
if (f != null)
{
graph.RemoveFilter(f);
}
}
}
}
base.DoStopInternal(state);
}
/*
* protected void InitAudioSampleGrabber()
* {
* // Get the graph builder
* IGraphBuilder graphBuilder = (mediaControl as IGraphBuilder);
* if (graphBuilder == null)
* return;
*
* try
* {
* // Build the sample grabber
* sampleGrabber = Activator.CreateInstance(Type.GetTypeFromCLSID(Filters.SampleGrabber, true))
* as ISampleGrabber;
*
* if (sampleGrabber == null)
* return;
*
* // Add it to the filter graph
* int hr = graphBuilder.AddFilter(sampleGrabber as IBaseFilter, "ProTONE_SampleGrabber");
* DsError.ThrowExceptionForHR(hr);
*
* AMMediaType mtAudio = new AMMediaType();
* mtAudio.majorType = MediaType.Audio;
* mtAudio.subType = MediaSubType.PCM;
* mtAudio.formatPtr = IntPtr.Zero;
*
* _actualAudioFormat = null;
*
* hr = sampleGrabber.SetMediaType(mtAudio);
* DsError.ThrowExceptionForHR(hr);
*
* hr = sampleGrabber.SetBufferSamples(true);
* DsError.ThrowExceptionForHR(hr);
*
* hr = sampleGrabber.SetOneShot(false);
* DsError.ThrowExceptionForHR(hr);
*
* hr = sampleGrabber.SetCallback(this, 1);
* DsError.ThrowExceptionForHR(hr);
*
* sampleAnalyzerMustStop.Reset();
* sampleAnalyzerThread = new Thread(new ThreadStart(SampleAnalyzerLoop));
* sampleAnalyzerThread.Priority = ThreadPriority.Highest;
* sampleAnalyzerThread.Start();
* }
* catch(Exception ex)
* {
* Logger.LogException(ex);
* }
*
* rotEntry = new DsROTEntry(graphBuilder as IFilterGraph);
* }*/
protected void InitAudioSampleGrabber_v2()
{
// Get the graph builder
IGraphBuilder graphBuilder = (mediaControl as IGraphBuilder);
if (graphBuilder == null)
{
return;
}
try
{
// Build the sample grabber
sampleGrabber = Activator.CreateInstance(Type.GetTypeFromCLSID(Filters.SampleGrabber, true))
as ISampleGrabber;
if (sampleGrabber == null)
{
return;
}
// Add it to the filter graph
int hr = graphBuilder.AddFilter(sampleGrabber as IBaseFilter, "ProTONE_SampleGrabber_v2");
DsError.ThrowExceptionForHR(hr);
IBaseFilter ffdAudioDecoder = null;
IPin ffdAudioDecoderOutput = null;
IPin soundDeviceInput = null;
IPin sampleGrabberInput = null;
IPin sampleGrabberOutput = null;
IntPtr pSoundDeviceInput = IntPtr.Zero;
// When using FFDShow, typically we'll find
// a ffdshow Audio Decoder connected to the sound device filter
//
// i.e. [ffdshow Audio Decoder] --> [DirectSound Device]
//
// Our audio sample grabber supports only PCM sample input and output.
// Its entire processing is based on this assumption.
//
// Thus need to insert the audio sample grabber between the ffdshow Audio Decoder and the sound device
// because this is the only place where we can find PCM samples. The sound device only accepts PCM.
//
// So we need to turn this graph:
//
// .. -->[ffdshow Audio Decoder]-->[DirectSound Device]
//
// into this:
//
// .. -->[ffdshow Audio Decoder]-->[Sample grabber]-->[DirectSound Device]
//
// Actions to do to achieve the graph change:
//
// 1. Locate the ffdshow Audio Decoder in the graph
// 2. Find its output pin and the pin that it's connected to
// 3. Locate the input and output pins of sample grabber
// 4. Disconnect the ffdshow Audio Decoder and its correspondent (sound device input pin)
// 5. Connect the ffdshow Audio Decoder to sample grabber input
// 6. Connect the sample grabber output to sound device input
// that's all.
// --------------
// 1. Locate the ffdshow Audio Decoder in the graph
hr = graphBuilder.FindFilterByName("ffdshow Audio Decoder", out ffdAudioDecoder);
DsError.ThrowExceptionForHR(hr);
// 2. Find its output pin and the pin that it's connected to
hr = ffdAudioDecoder.FindPin("Out", out ffdAudioDecoderOutput);
DsError.ThrowExceptionForHR(hr);
hr = ffdAudioDecoderOutput.ConnectedTo(out pSoundDeviceInput);
DsError.ThrowExceptionForHR(hr);
soundDeviceInput = new DSPin(pSoundDeviceInput).Value;
// 3. Locate the input and output pins of sample grabber
hr = (sampleGrabber as IBaseFilter).FindPin("In", out sampleGrabberInput);
DsError.ThrowExceptionForHR(hr);
hr = (sampleGrabber as IBaseFilter).FindPin("Out", out sampleGrabberOutput);
DsError.ThrowExceptionForHR(hr);
// 4. Disconnect the ffdshow Audio Decoder and its correspondent (sound device input pin)
hr = ffdAudioDecoderOutput.Disconnect();
DsError.ThrowExceptionForHR(hr);
hr = soundDeviceInput.Disconnect();
DsError.ThrowExceptionForHR(hr);
// 5. Connect the ffdshow Audio Decoder to sample grabber input
hr = graphBuilder.Connect(ffdAudioDecoderOutput, sampleGrabberInput);
DsError.ThrowExceptionForHR(hr);
// 6. Connect the sample grabber output to sound device input
hr = graphBuilder.Connect(sampleGrabberOutput, soundDeviceInput);
DsError.ThrowExceptionForHR(hr);
AMMediaType mtAudio = new AMMediaType();
mtAudio.majorType = MediaType.Audio;
mtAudio.subType = MediaSubType.PCM;
mtAudio.formatPtr = IntPtr.Zero;
_actualAudioFormat = null;
sampleGrabber.SetMediaType(mtAudio);
sampleGrabber.SetBufferSamples(true);
sampleGrabber.SetOneShot(false);
sampleGrabber.SetCallback(this, 1);
sampleAnalyzerMustStop.Reset();
sampleAnalyzerThread = new Thread(new ThreadStart(SampleAnalyzerLoop));
sampleAnalyzerThread.Priority = ThreadPriority.Highest;
sampleAnalyzerThread.Start();
}
catch (Exception ex)
{
Logger.LogException(ex);
}
rotEntry = new DsROTEntry(graphBuilder as IFilterGraph);
}
