/// <summary>
/// Creates a new encoder that encodes to the specified output media type
/// </summary>
/// <param name="outputMediaType">Desired output media type</param>
public MediaFoundationEncoder(MediaType outputMediaType)
{
if (outputMediaType == null) throw new ArgumentNullException("outputMediaType");
this.outputMediaType = outputMediaType;
}
/// <summary>
/// Encodes a file
/// </summary>
/// <param name="outputFile">Output filename (container type is deduced from the filename)</param>
/// <param name="inputProvider">Input provider (should be PCM, some encoders will also allow IEEE float)</param>
public void Encode(string outputFile, IWaveProvider inputProvider)
{
if (inputProvider.WaveFormat.Encoding != WaveFormatEncoding.Pcm && inputProvider.WaveFormat.Encoding != WaveFormatEncoding.IeeeFloat)
{
throw new ArgumentException("Encode input format must be PCM or IEEE float");
}
var inputMediaType = new MediaType(inputProvider.WaveFormat);
var writer = CreateSinkWriter(outputFile);
try
{
int streamIndex;
writer.AddStream(outputMediaType.MediaFoundationObject, out streamIndex);
// n.b. can get 0xC00D36B4 - MF_E_INVALIDMEDIATYPE here
writer.SetInputMediaType(streamIndex, inputMediaType.MediaFoundationObject, null);
PerformEncode(writer, streamIndex, inputProvider);
}
finally
{
Marshal.ReleaseComObject(writer);
Marshal.ReleaseComObject(inputMediaType.MediaFoundationObject);
}
}