private void SetupGraphForRateChange(double rate)
{
int hr = 0;
if (ps.UseCustomAudioRenderer)
{
if (device == null)
{
MMDeviceEnumerator DevEnum = new MMDeviceEnumerator();
if (!string.IsNullOrEmpty(ps.AudioPlaybackDevice))
device = DevEnum.GetDevice(ps.AudioPlaybackDevice);
if (device == null)
device = DevEnum.GetDefaultAudioEndpoint(EDataFlow.eRender, ERole.eMultimedia);
}
//if (rate > Math.Abs(1.5))
//{
// //if(fVol == float.MinValue)
// // fVol = device.AudioEndpointVolume.MasterVolumeLevelScalar;
// //device.AudioEndpointVolume.MasterVolumeLevelScalar = 0;
// device.AudioEndpointVolume.Mute = true;
//}
//else if (rate <= Math.Abs(1.5))
//{
// //if (fVol > float.MinValue)
// //{
// // device.AudioEndpointVolume.MasterVolumeLevelScalar = fVol;
// // fVol = float.MinValue;
// //}
// device.AudioEndpointVolume.Mute = false;
//}
IBasicAudio ba = graphBuilder as IBasicAudio;
if (ba != null)
{
int orgVol = 0;
hr = ba.get_Volume(out orgVol);
DsError.ThrowExceptionForHR(hr);
if (Math.Abs(rate) > 1.5)
{
hr = ba.put_Volume(-10000); //turn off the volume so we can ffwd
DsError.ThrowExceptionForHR(hr);
}
else if (Math.Abs(rate) <= 1.5)
{
hr = ba.put_Volume(0); //set the volume back to full
DsError.ThrowExceptionForHR(hr);
}
}
}
else
{
IPin arIn = null;
try
{
if (Math.Abs(rate) > 4 && m_adecOut == null)
{
//find the audio renderer
if (audioRenderer == null)
audioRenderer = FilterGraphTools.FindFilterByClsid(graphBuilder, m_audioRendererClsid);
if (audioRenderer != null)
{
hr = audioRenderer.GetClassID(out m_audioRendererClsid);
DsError.ThrowExceptionForHR(hr);
//grab the audio decoder's output pin
arIn = DsFindPin.ByDirection(audioRenderer, PinDirection.Input, 0);
hr = arIn.ConnectedTo(out m_adecOut);
DsError.ThrowExceptionForHR(hr);
//stop the graph
hr = mediaControl.Stop();
DsError.ThrowExceptionForHR(hr);
//remove it
hr = graphBuilder.RemoveFilter(audioRenderer);
DsError.ThrowExceptionForHR(hr);
//start the graph again
hr = mediaControl.Run();
DsError.ThrowExceptionForHR(hr);
}
}
else if (Math.Abs(rate) <= 4 && m_adecOut != null)
{
//audioRenderer = FilterGraphTools.AddFilterFromClsid(graphBuilder, m_audioRendererClsid, "Audio Renderer");
if (audioRenderer != null)
{
//stop the graph
hr = mediaControl.Stop();
DsError.ThrowExceptionForHR(hr);
hr = graphBuilder.AddFilter(audioRenderer, "Audio Renderer");
DsError.ThrowExceptionForHR(hr);
//connect it to the decoder pin
arIn = DsFindPin.ByDirection(audioRenderer, PinDirection.Input, 0);
hr = graphBuilder.ConnectDirect(m_adecOut, arIn, null);
DsError.ThrowExceptionForHR(hr);
Marshal.ReleaseComObject(m_adecOut);
m_adecOut = null;
//start the graph again
hr = mediaControl.Run();
DsError.ThrowExceptionForHR(hr);
}
}
if (Math.Abs(rate) <= 4)
{
//{601D2A2B-9CDE-40BD-8650-0485E3522727}
//{EC9ED6FC-7B03-4CB6-8C01-4EABE109F26B}
IBasicAudio ba = graphBuilder as IBasicAudio;
if (ba != null)
{
int orgVol = 0;
hr = ba.get_Volume(out orgVol);
DsError.ThrowExceptionForHR(hr);
if (Math.Abs(rate) > 1.5)
{
hr = ba.put_Volume(-10000); //turn off the volume so we can ffwd
DsError.ThrowExceptionForHR(hr);
}
else if (Math.Abs(rate) <= 1.5)
{
hr = ba.put_Volume(0); //set the volume back to full
DsError.ThrowExceptionForHR(hr);
}
}
}
}
finally
{
//if (audioRenderer != null)
// Marshal.ReleaseComObject(audioRenderer);
if (arIn != null)
Marshal.ReleaseComObject(arIn);
}
}
}