private string ShortDescription(MediaType mediaType)
{
Guid subType = mediaType.SubType;
int sampleRate = mediaType.SampleRate;
int bytesPerSecond = mediaType.AverageBytesPerSecond;
int channels = mediaType.ChannelCount;
int bitsPerSample = mediaType.TryGetUInt32(MediaFoundationAttributes.MF_MT_AUDIO_BITS_PER_SAMPLE);
//int bitsPerSample;
//mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_BITS_PER_SAMPLE, out bitsPerSample);
var shortDescription = new StringBuilder();
shortDescription.AppendFormat("{0:0.#}kbps, ", (8 * bytesPerSecond) / 1000M);
shortDescription.AppendFormat("{0:0.#}kHz, ", sampleRate / 1000M);
if (bitsPerSample != -1)
shortDescription.AppendFormat("{0} bit, ", bitsPerSample);
shortDescription.AppendFormat("{0}, ", channels == 1 ? "mono" : channels == 2 ? "stereo" : channels.ToString() + " channels");
if (subType == AudioSubtypes.MFAudioFormat_AAC)
{
int payloadType = mediaType.TryGetUInt32(MediaFoundationAttributes.MF_MT_AAC_PAYLOAD_TYPE);
if (payloadType != -1)
shortDescription.AppendFormat("Payload Type: {0}, ", (AacPayloadType)payloadType);
}
shortDescription.Length -= 2;
return shortDescription.ToString();
}
