private long GetLength(MFSourceReader reader)
{
lock (_lockObj)
{
try
{
if (reader == null)
{
return(0);
}
using (
PropertyVariant value =
reader.GetPresentationAttribute(NativeMethods.MF_SOURCE_READER_MEDIASOURCE,
MediaFoundationAttributes.MF_PD_DURATION))
{
//bug: still, depending on the decoder, this returns imprecise values.
return(NanoSecond100UnitsToBytes(value.HValue));
}
}
catch (Exception)
{
return(0);
}
}
}
private long GetLength(MFSourceReader reader)
{
lock (_lockObj)
{
try
{
if (reader == null)
{
return(0);
}
PropertyVariant value = reader.GetPresentationAttribute(MFInterops.MF_SOURCE_READER_MEDIASOURCE, MediaFoundationAttributes.MF_PD_DURATION);
var length = ((value.HValue) * _waveFormat.BytesPerSecond) / 10000000L;
value.Dispose();
return(length);
}
catch (Exception)
{
//if (e.Result == (int)HResult.MF_E_ATTRIBUTENOTFOUND)
// return 0;
//throw;
return(0);
}
}
}
private long GetLength(MFSourceReader reader)
{
lock (_lockObj)
{
try
{
if (reader == null)
{
return(0);
}
using (
PropertyVariant value =
reader.GetPresentationAttribute(NativeMethods.MF_SOURCE_READER_MEDIASOURCE,
MediaFoundationAttributes.MF_PD_DURATION))
{
//bug: still, depending on the decoder, this returns imprecise values.
return(((value.HValue) * _waveFormat.BytesPerSecond) / 10000000L);
}
}
catch (Exception)
{
//if (e.Result == (int)HResult.MF_E_ATTRIBUTENOTFOUND)
// return 0;
//throw;
return(0);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationDecoder" /> class.
/// </summary>
/// <param name="byteStream">Stream which provides the audio data to decode.</param>
public MediaFoundationDecoder(MFByteStream byteStream)
{
if (byteStream == null)
throw new ArgumentNullException("byteStream");
_byteStream = byteStream;
_reader = Initialize(_byteStream);
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationDecoder" /> class.
/// </summary>
/// <param name="byteStream">Stream which provides the audio data to decode.</param>
public MediaFoundationDecoder(MFByteStream byteStream)
{
if (byteStream == null)
{
throw new ArgumentNullException("byteStream");
}
_byteStream = byteStream;
_reader = Initialize(_byteStream);
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationDecoder" /> class.
/// </summary>
/// <param name="url">Uri which points to an audio source which can be decoded.</param>
public MediaFoundationDecoder(string url)
{
if (String.IsNullOrEmpty(url))
throw new ArgumentNullException("url");
_hasFixedLength = true;
_reader = Initialize(MediaFoundationCore.CreateSourceReaderFromUrl(url));
}
private MFSourceReader Initialize(MFSourceReader reader)
{
try
{
reader.SetStreamSelection(NativeMethods.MF_SOURCE_READER_ALL_STREAMS, false);
reader.SetStreamSelection(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
using (MFMediaType mediaType = MFMediaType.CreateEmpty())
{
mediaType.MajorType = AudioSubTypes.MediaTypeAudio;
mediaType.SubType = AudioSubTypes.Pcm; //variable??
reader.SetCurrentMediaType(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM, mediaType);
}
using (
MFMediaType currentMediaType =
reader.GetCurrentMediaType(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM))
{
if (currentMediaType.MajorType != AudioSubTypes.MediaTypeAudio)
{
throw new InvalidOperationException(String.Format(
"Invalid Majortype set on sourcereader: {0}.", currentMediaType.MajorType));
}
AudioEncoding encoding = AudioSubTypes.EncodingFromSubType(currentMediaType.SubType);
ChannelMask channelMask;
if (currentMediaType.TryGet(MediaFoundationAttributes.MF_MT_AUDIO_CHANNEL_MASK, out channelMask))
//check whether the attribute is available
{
_waveFormat = new WaveFormatExtensible(currentMediaType.SampleRate,
currentMediaType.BitsPerSample, currentMediaType.Channels, currentMediaType.SubType,
channelMask);
}
else
{
_waveFormat = new WaveFormat(currentMediaType.SampleRate, currentMediaType.BitsPerSample,
currentMediaType.Channels, encoding);
}
}
reader.SetStreamSelection(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
if (_hasFixedLength)
{
_length = GetLength(reader);
}
return(reader);
}
catch (Exception)
{
DisposeInternal();
throw;
}
}
private MFSourceReader Initialize(MFSourceReader reader)
{
MediaFoundationCore.Startup();
try
{
reader.SetStreamSelection(MFInterops.MF_SOURCE_READER_ALL_STREAMS, false);
reader.SetStreamSelection(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
using (var mediaType = MFMediaType.CreateEmpty())
{
mediaType.MajorType = MediaTypes.MediaTypeAudio;
mediaType.SubType = MediaTypes.MEDIATYPE_Pcm; //variable??
reader.SetCurrentMediaType(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM, mediaType);
}
using (var currentMediaType = reader.GetCurrentMediaType(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM))
{
if (currentMediaType.MajorType != MediaTypes.MediaTypeAudio)
{
throw new InvalidOperationException(String.Format("Invalid Majortype set on sourcereader: {0}.", currentMediaType.MajorType.ToString()));
}
AudioEncoding encoding;
if (currentMediaType.SubType == MediaTypes.MEDIATYPE_Pcm)
{
encoding = AudioEncoding.Pcm;
}
else if (currentMediaType.SubType == MediaTypes.MEDIATYPE_IeeeFloat)
{
encoding = AudioEncoding.IeeeFloat;
}
else
{
throw new InvalidOperationException(String.Format("Invalid Subtype set on sourcereader: {0}.", currentMediaType.SubType.ToString()));
}
_waveFormat = new WaveFormat(currentMediaType.SampleRate, currentMediaType.BitsPerSample, currentMediaType.Channels, encoding);
}
reader.SetStreamSelection(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
if (_hasFixedLength)
{
_length = GetLength(reader);
}
return(reader);
}
catch (Exception)
{
Dispose();
throw;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationDecoder" /> class.
/// </summary>
/// <param name="url">Uri which points to an audio source which can be decoded.</param>
public MediaFoundationDecoder(string url)
{
if (String.IsNullOrEmpty(url))
{
throw new ArgumentNullException("url");
}
_hasFixedLength = true;
_reader = Initialize(MediaFoundationCore.CreateSourceReaderFromUrl(url));
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationDecoder" /> class.
/// </summary>
/// <param name="stream">Stream which provides the audio data to decode.</param>
public MediaFoundationDecoder(Stream stream)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (!stream.CanRead)
throw new ArgumentException("Stream is not readable.", "stream");
stream = new ComStream(stream);
_stream = stream;
_byteStream = MediaFoundationCore.IStreamToByteStream((IStream) stream);
_reader = Initialize(_byteStream);
}
/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationDecoder" /> class.
/// </summary>
/// <param name="stream">Stream which provides the audio data to decode.</param>
public MediaFoundationDecoder(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanRead)
{
throw new ArgumentException("Stream is not readable.", "stream");
}
stream = new ComStream(stream);
_stream = stream;
_byteStream = MediaFoundationCore.IStreamToByteStream((IStream)stream);
_reader = Initialize(_byteStream);
}
private void DisposeInternal()
{
if (_reader != null)
{
_reader.Dispose();
_reader = null;
}
if (_byteStream != null)
{
_byteStream.Dispose();
_byteStream = null;
}
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
}
protected virtual void Dispose(bool disposing)
{
lock (_lockObj)
{
if (_reader != null)
{
_reader.Dispose();
_reader = null;
}
if (_byteStream != null)
{
Marshal.ReleaseComObject(_byteStream);
_byteStream = null;
}
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
}
}
protected virtual void Dispose(bool disposing)
{
lock (_lockObj)
{
if (_reader != null)
{
_reader.Dispose();
_reader = null;
}
if (_byteStream != null)
{
Marshal.ReleaseComObject(_byteStream);
_byteStream = null;
}
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
}
}
private MFSourceReader Initialize(MFSourceReader reader)
{
MediaFoundationCore.Startup();
try
{
reader.SetStreamSelection(MFInterops.MF_SOURCE_READER_ALL_STREAMS, false);
reader.SetStreamSelection(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
using (var mediaType = MFMediaType.CreateEmpty())
{
mediaType.MajorType = MediaTypes.MediaTypeAudio;
mediaType.SubType = MediaTypes.MEDIATYPE_Pcm; //variable??
reader.SetCurrentMediaType(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM, mediaType);
}
using (var currentMediaType = reader.GetCurrentMediaType(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM))
{
if (currentMediaType.MajorType != MediaTypes.MediaTypeAudio)
throw new InvalidOperationException(String.Format("Invalid Majortype set on sourcereader: {0}.", currentMediaType.MajorType.ToString()));
AudioEncoding encoding;
if (currentMediaType.SubType == MediaTypes.MEDIATYPE_Pcm)
encoding = AudioEncoding.Pcm;
else if (currentMediaType.SubType == MediaTypes.MEDIATYPE_IeeeFloat)
encoding = AudioEncoding.IeeeFloat;
else
throw new InvalidOperationException(String.Format("Invalid Subtype set on sourcereader: {0}.", currentMediaType.SubType.ToString()));
_waveFormat = new WaveFormat(currentMediaType.SampleRate, currentMediaType.BitsPerSample, currentMediaType.Channels, encoding);
}
reader.SetStreamSelection(MFInterops.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
if (_hasFixedLength)
_length = GetLength(reader);
return reader;
}
catch (Exception)
{
Dispose();
throw;
}
}
private MFSourceReader Initialize(MFSourceReader reader)
{
try
{
reader.SetStreamSelection(NativeMethods.MF_SOURCE_READER_ALL_STREAMS, false);
reader.SetStreamSelection(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
using (MFMediaType mediaType = MFMediaType.CreateEmpty())
{
mediaType.MajorType = AudioSubTypes.MediaTypeAudio;
mediaType.SubType = AudioSubTypes.Pcm; //variable??
reader.SetCurrentMediaType(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM, mediaType);
}
using (
MFMediaType currentMediaType =
reader.GetCurrentMediaType(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM))
{
if (currentMediaType.MajorType != AudioSubTypes.MediaTypeAudio)
{
throw new InvalidOperationException(String.Format(
"Invalid Majortype set on sourcereader: {0}.", currentMediaType.MajorType));
}
AudioEncoding encoding = AudioSubTypes.EncodingFromSubType(currentMediaType.SubType);
ChannelMask channelMask;
if (currentMediaType.TryGet(MediaFoundationAttributes.MF_MT_AUDIO_CHANNEL_MASK, out channelMask))
//check whether the attribute is available
{
_waveFormat = new WaveFormatExtensible(currentMediaType.SampleRate,
currentMediaType.BitsPerSample, currentMediaType.Channels, currentMediaType.SubType,
channelMask);
}
else
{
_waveFormat = new WaveFormat(currentMediaType.SampleRate, currentMediaType.BitsPerSample,
currentMediaType.Channels, encoding);
}
}
reader.SetStreamSelection(NativeMethods.MF_SOURCE_READER_FIRST_AUDIO_STREAM, true);
if (_hasFixedLength)
_length = GetLength(reader);
return reader;
}
catch (Exception)
{
DisposeInternal();
throw;
}
}
private long GetLength(MFSourceReader reader)
{
lock (_lockObj)
{
try
{
if (reader == null)
return 0;
using (
PropertyVariant value =
reader.GetPresentationAttribute(NativeMethods.MF_SOURCE_READER_MEDIASOURCE,
MediaFoundationAttributes.MF_PD_DURATION))
{
//bug: still, depending on the decoder, this returns imprecise values.
return NanoSecond100UnitsToBytes(value.HValue);
}
}
catch (Exception)
{
return 0;
}
}
}
private void DisposeInternal()
{
if (_reader != null)
{
_reader.Dispose();
_reader = null;
}
if (_byteStream != null)
{
_byteStream.Dispose();
_byteStream = null;
}
if (_stream != null)
{
_stream.Dispose();
_stream = null;
}
}
private long GetLength(MFSourceReader reader)
{
lock (_lockObj)
{
try
{
if (reader == null)
return 0;
PropertyVariant value = reader.GetPresentationAttribute(MFInterops.MF_SOURCE_READER_MEDIASOURCE, MediaFoundationAttributes.MF_PD_DURATION);
var length = ((value.HValue) * _waveFormat.BytesPerSecond) / 10000000L;
value.Dispose();
return length;
}
catch (Exception)
{
//if (e.Result == (int)HResult.MF_E_ATTRIBUTENOTFOUND)
// return 0;
//throw;
return 0;
}
}
}
private long GetLength(MFSourceReader reader)
{
lock (_lockObj)
{
try
{
if (reader == null)
return 0;
using (
PropertyVariant value =
reader.GetPresentationAttribute(NativeMethods.MF_SOURCE_READER_MEDIASOURCE,
MediaFoundationAttributes.MF_PD_DURATION))
{
//bug: still, depending on the decoder, this returns imprecise values.
return ((value.HValue) * _waveFormat.BytesPerSecond) / 10000000L;
}
}
catch (Exception)
{
//if (e.Result == (int)HResult.MF_E_ATTRIBUTENOTFOUND)
// return 0;
//throw;
return 0;
}
}
}
