public void CanExamineInputTypesOnMp3Decoder()
{
var decoder = new WindowsMediaMp3Decoder();
Assert.AreEqual(decoder.MediaObject.InputStreamCount, 1);
foreach (DmoMediaType mediaType in decoder.MediaObject.GetInputTypes(0))
{
Debug.WriteLine(String.Format("{0}:{1}:{2}",
mediaType.MajorTypeName,
mediaType.SubTypeName,
mediaType.FormatTypeName));
}
}
public void CanExamineOutputTypesOnDecoder()
{
var decoder = new WindowsMediaMp3Decoder();
decoder.MediaObject.SetInputWaveFormat(0,new Mp3WaveFormat(44100, 2, 200, 32000));
Assert.AreEqual(decoder.MediaObject.OutputStreamCount, 1);
foreach (DmoMediaType mediaType in decoder.MediaObject.GetOutputTypes(0))
{
Debug.WriteLine(String.Format("{0}:{1}:{2}",
mediaType.MajorTypeName,
mediaType.SubTypeName,
mediaType.FormatTypeName));
}
}
/// <summary>
/// Dispose of this obejct and clean up resources
/// </summary>
public void Dispose()
{
if (inputMediaBuffer != null)
{
inputMediaBuffer.Dispose();
inputMediaBuffer = null;
}
outputBuffer.Dispose();
if (mp3Decoder != null)
{
mp3Decoder.Dispose();
mp3Decoder = null;
}
}
/// <summary>
/// Initializes a new instance of the DMO MP3 Frame decompressor
/// </summary>
/// <param name="sourceFormat"></param>
public DmoMp3FrameDecompressor(WaveFormat sourceFormat)
{
this.mp3Decoder = new WindowsMediaMp3Decoder();
if (!mp3Decoder.MediaObject.SupportsInputWaveFormat(0, sourceFormat))
{
throw new ArgumentException("Unsupported input format");
}
mp3Decoder.MediaObject.SetInputWaveFormat(0, sourceFormat);
pcmFormat = new WaveFormat(sourceFormat.SampleRate, sourceFormat.Channels); // 16 bit
if (!mp3Decoder.MediaObject.SupportsOutputWaveFormat(0, pcmFormat))
{
throw new ArgumentException(String.Format("Unsupported output format {0}", pcmFormat));
}
mp3Decoder.MediaObject.SetOutputWaveFormat(0, pcmFormat);
// a second is more than enough to decompress a frame at a time
inputMediaBuffer = new MediaBuffer(sourceFormat.AverageBytesPerSecond);
outputBuffer = new DmoOutputDataBuffer(pcmFormat.AverageBytesPerSecond);
}
private bool IsOutputFormatSupported(WaveFormat waveFormat)
{
var decoder = new WindowsMediaMp3Decoder();
return decoder.MediaObject.SupportsOutputWaveFormat(0, waveFormat);
}
