public MediaFoundationAudioWriter(MF.SinkWriter sinkWriter, ref WAVEFORMATEX waveFormat, int desiredBitRate = 192000)
{
var sharpWf = waveFormat.ToSharpDX();
// Information on configuring an AAC media type can be found here:
// http://msdn.microsoft.com/en-gb/library/windows/desktop/dd742785%28v=vs.85%29.aspx
var outputMediaType = SelectMediaType(AudioFormat, sharpWf, desiredBitRate);
if (outputMediaType == null) throw new InvalidOperationException("No suitable encoders available");
var inputMediaType = new MF.MediaType();
var size = 18 + sharpWf.ExtraSize;
sinkWriter.AddStream(outputMediaType, out streamIndex);
MF.MediaFactory.InitMediaTypeFromWaveFormatEx(inputMediaType, new[] { sharpWf }, size);
sinkWriter.SetInputMediaType(streamIndex, inputMediaType, null);
}
/// <summary> /// Creates a media target. /// </summary> /// <param name="sinkWriter">The previously created SinkWriter.</param> /// <param name="videoPixelSize">The pixel size of the video.</param> /// <param name="streamIndex">The stream index for the new target.</param> protected abstract void CreateMediaTarget(MF.SinkWriter sinkWriter, SharpDX.Size2 videoPixelSize, out int streamIndex);