/// <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);
}
/// <summary>
/// Determine if a particular format is compatible with the encoder.
/// </summary>
/// <returns></returns>
public static bool WorksWithOpus(WAVEFORMATEX wfex)
{
if (wfex.BitsPerSample != 16)
{
return(false);
}
if (wfex.Channels != 1 && wfex.Channels != 2)
{
return(false);
}
foreach (int f in ValuesFrequency)
{
if (wfex.SamplesPerSec == f)
{
return(true);
}
}
return(false);
}
public CompressorFmt(WAVEFORMATEX wfex) {
this.WFEX = wfex;
}
/// <summary>
/// Determine if a particular format is compatible with the encoder.
/// </summary>
/// <returns></returns>
public static bool WorksWithOpus(WAVEFORMATEX wfex) {
if (wfex.BitsPerSample != 16)
return false;
if (wfex.Channels != 1 && wfex.Channels != 2) {
return false;
}
foreach (int f in ValuesFrequency) {
if (wfex.SamplesPerSec == f) {
return true;
}
}
return false;
}
