/// <summary>
/// Adds an audio compressor if needed (by checking the registry)
/// </summary>
public void AddAudioCompressor()
{
FilterInfo compressor = AudioCapability.SelectedCompressor();
if (compressor.Moniker != "Uncompressed")
{
try
{
cg.AddCompressor(SelectedCompressor());
Log(cg.Compressor.Dump());
IAudioCaptureGraph iacg = cg as IAudioCaptureGraph;
Dictionary <string, Object> args = new Dictionary <string, object>();
args.Add("CaptureGraph", cg);
args.Add("CompressionMediaTypeIndex", this.CompressionMediaTypeIndex);
iacg.AudioCompressor.PostConnectConfig(args);
}
catch (Exception e)
{
// If we encounter an error trying to add or configure the
// compressor, just disable compressor and log it
//RegAudioCompressorEnabled = false;
Log(e.ToString());
}
}
}
/// <summary>
/// By default, we use the Windows Media Audio V2 compressor
/// </summary>
private void DefaultAudioCompressorSettings()
{
Debug.Assert(AudioCompressor.DefaultName == "Windows Media Audio V2");
IAudioCaptureGraph iacg = cg as IAudioCaptureGraph;
iacg.AudioCompressor.SetMediaType(iacg.AudioCompressor.PreConnectMediaTypes[this.CompressionMediaTypeIndex]);
}
/// <summary>
/// Configure the Opus encoder filter
/// after the encoder is in the graph and connected
/// to the source.
///
/// Warning: This might not work for a DVCaptureGraph.
/// </summary>
/// <param name="cg"></param>
/// <param name="j"></param>
public override void PostConnectConfig(Dictionary <string, Object> args)
{
CaptureGraph cg = args["CaptureGraph"] as CaptureGraph;
IAudioCaptureGraph iacg = cg as IAudioCaptureGraph;
_AMMediaType[] mts = Pin.GetMediaTypes(cg.Source.OutputPin);
bool mtSet = false;
foreach (_AMMediaType mt in mts)
{
WAVEFORMATEX wfex = (WAVEFORMATEX)MediaType.FormatType.MarshalData(mt);
if ((wfex.SamplesPerSec == Frequency) && (wfex.Channels == Channels) && (wfex.BitsPerSample == Depth))
{
cg.Source.SetMediaType(mt);
mtSet = true;
break;
}
}
if (!mtSet)
{
throw new ApplicationException("The audio device doesn't support the configured values of SamplesPerSec/Channels/BitsPerSample.");
}
IOpusEncoderCtl iOpus = (IOpusEncoderCtl)iacg.AudioCompressor.BaseFilter;
iOpus.SetSignal(Signal);
int br = BitRate;
if (br == 0)
{
br = ManualBitRate;
}
iOpus.SetBitRate(br);
iOpus.SetComplexity(Complexity);
iOpus.SetMaxBandwidth(MaxBandwidth);
iOpus.SetVbr(VBR);
iOpus.SetVbrConstraint(VBRConstraint);
iOpus.SetDtx(DTX);
iOpus.SetPacketLossPerc(PacketLossPerc);
iOpus.SetLsbDepth(LSBDepth);
iOpus.SetForcedChannels(ForcedChannels);
}
