/// <summary>
/// Returns a new instance of the <see cref="MediaFoundationEncoder"/> class, configured as mp3 encoder.
/// </summary>
/// <param name="sourceFormat">The input format, of the data to encode.</param>
/// <param name="bitRate">The bitrate to use. The final bitrate can differ from the specified value.</param>
/// <param name="targetStream">The stream to write to.</param>
/// <remarks>For more information about supported input and output formats, see <see href="http://msdn.microsoft.com/en-us/library/windows/desktop/hh162907(v=vs.85).aspx"/>.</remarks>
/// <returns>A new instance of the <see cref="MediaFoundationEncoder"/> class, configured as mp3 encoder.</returns>
// ReSharper disable once InconsistentNaming
public static MediaFoundationEncoder CreateMP3Encoder(WaveFormat sourceFormat, Stream targetStream,
int bitRate = 192000)
{
if (sourceFormat == null)
{
throw new ArgumentNullException("sourceFormat");
}
if (targetStream == null)
{
throw new ArgumentNullException("targetStream");
}
if (targetStream.CanWrite != true)
{
throw new ArgumentException("Stream not writeable.", "targetStream");
}
MFMediaType targetMediaType = FindBestMediaType(AudioSubTypes.MpegLayer3, sourceFormat.SampleRate,
sourceFormat.Channels, bitRate);
MFMediaType sourceMediaType = MediaFoundationCore.MediaTypeFromWaveFormat(sourceFormat);
if (targetMediaType == null)
{
throw new PlatformNotSupportedException("No MP3-Encoder was found.");
}
return(new MediaFoundationEncoder(targetStream, sourceMediaType, targetMediaType,
TranscodeContainerTypes.MFTranscodeContainerType_MP3)
{
_disposeBaseStream = false
});
}
/// <returns>Ticks, NO BYTES!</returns>
private long WriteBlock(byte[] buffer, int offset, int count, int streamIndex, long positionInTicks, int sourceBytesPerSecond)
{
int bytesToWrite = count;
using (MFMediaBuffer mfBuffer = new MFMediaBuffer(MediaFoundationCore.CreateMemoryBuffer(bytesToWrite)))
{
using (MFSample sample = new MFSample(MediaFoundationCore.CreateEmptySample()))
{
sample.AddBuffer(mfBuffer);
int currentLength, maxLength;
IntPtr bufferPtr = mfBuffer.Lock(out maxLength, out currentLength);
long ticks = BytesToNanoSeconds(count, sourceBytesPerSecond);
Marshal.Copy(buffer, offset, bufferPtr, count);
mfBuffer.SetCurrentLength(count);
mfBuffer.Unlock();
sample.SetSampleTime(positionInTicks);
sample.SetSampleDuration(ticks);
_sinkWriter.WriteSample(_streamIndex, sample);
return(ticks);
}
}
}
/// <summary>
/// See http://msdn.microsoft.com/en-us/library/windows/desktop/ff819498(v=vs.85).aspx for supported input and output types.
/// </summary>
public static MediaFoundationEncoder CreateWMAEncoder(WaveFormat sourceFormat, Stream targetStream, int bitRate = 192000)
{
if (sourceFormat == null)
{
throw new ArgumentNullException("sourceFormat");
}
if (targetStream == null)
{
throw new ArgumentNullException("targetStream");
}
if (targetStream.CanWrite != true)
{
throw new ArgumentException("Stream not writeable.", "targetStream");
}
var targetMediaType = FindBestMediaType(MediaFoundation.MFMediaTypes.MFAudioFormat_WMAudioV8, sourceFormat.SampleRate, sourceFormat.Channels, bitRate);
var sourceMediaType = MediaFoundationCore.MediaTypeFromWaveFormat(sourceFormat);
if (targetMediaType == null)
{
throw new PlatformNotSupportedException("No WMA-Encoder was found.");
}
return(new MediaFoundationEncoder(targetStream, sourceMediaType, targetMediaType, TranscodeContainerTypes.MFTranscodeContainerType_ASF));
}
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));
}
protected static MFMediaType FindBestMediaType(Guid audioSubType, int sampleRate, int channels, int bitRate)
{
var mediaTypes = MediaFoundationCore.GetEncoderMediaTypes(audioSubType);
var n = mediaTypes.Where(x => x.SampleRate == sampleRate && x.Channels == channels);
var availableMediaTypes = n.Select(x => new
{
mediaType = x,
dif = Math.Abs(bitRate - (x.AverageBytesPerSecond * 8))
});
return(availableMediaTypes.OrderBy(x => x.dif).Select(x => x.mediaType).FirstOrDefault());
}
protected void SetTargetStream(Stream stream, MFMediaType inputMediaType, MFMediaType targetMediaType, Guid containerType)
{
IMFAttributes attributes = null;
try
{
_targetStream = MediaFoundationCore.IStreamToByteStream(new ComStream(stream));
MFByteStreamCapsFlags flags = MFByteStreamCapsFlags.None;
int result = _targetStream.GetCapabilities(ref flags);
attributes = MediaFoundationCore.CreateEmptyAttributes(2);
attributes.SetUINT32(MediaFoundationAttributes.MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, 1);
attributes.SetGUID(MediaFoundationAttributes.MF_TRANSCODE_CONTAINERTYPE, containerType);
_sinkWriter = MediaFoundationCore.CreateSinkWriterFromMFByteStream(_targetStream, attributes);
_streamIndex = _sinkWriter.AddStream(targetMediaType);
_sinkWriter.SetInputMediaType(_streamIndex, inputMediaType, null);
_inputMediaType = inputMediaType;
_targetMediaType = targetMediaType;
_sourceBytesPerSecond = inputMediaType.AverageBytesPerSecond;
//initialize the sinkwriter
_sinkWriter.BeginWriting();
}
catch (Exception)
{
if (_sinkWriter != null)
{
_sinkWriter.Dispose();
_sinkWriter = null;
}
if (_targetStream != null)
{
_targetStream.Close();
Marshal.ReleaseComObject(_targetStream);
_targetStream = null;
}
throw;
}
finally
{
if (attributes != null)
{
Marshal.ReleaseComObject(attributes);
}
}
}
/// <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>
/// Sets and initializes the targetstream for the encoding process.
/// </summary>
/// <param name="stream">Stream which should be used as the targetstream.</param>
/// <param name="inputMediaType">Mediatype of the raw input data to encode.</param>
/// <param name="targetMediaType">Mediatype of the encoded data.</param>
/// <param name="containerType">Container type which should be used.</param>
protected void SetTargetStream(Stream stream, MFMediaType inputMediaType, MFMediaType targetMediaType,
Guid containerType)
{
MFAttributes attributes = null;
try
{
_targetBaseStream = new ComStream(stream);
_targetStream = MediaFoundationCore.IStreamToByteStream(_targetBaseStream);
attributes = new MFAttributes(2);
attributes.SetUINT32(MediaFoundationAttributes.MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS, 1);
attributes.SetGuid(MediaFoundationAttributes.MF_TRANSCODE_CONTAINERTYPE, containerType);
_sinkWriter = new MFSinkWriter(_targetStream, attributes);
_streamIndex = _sinkWriter.AddStream(targetMediaType);
_sinkWriter.SetInputMediaType(_streamIndex, inputMediaType, null);
_targetMediaType = targetMediaType;
_sourceBytesPerSecond = inputMediaType.AverageBytesPerSecond;
//initialize the sinkwriter
_sinkWriter.BeginWriting();
}
catch (Exception)
{
if (_sinkWriter != null)
{
_sinkWriter.Dispose();
_sinkWriter = null;
}
if (_targetStream != null)
{
_targetStream.Dispose();
_targetStream = null;
}
throw;
}
finally
{
if (attributes != null)
{
attributes.Dispose();
}
}
}
static MediaFoundationDecoder()
{
MediaFoundationCore.Startup(); //make sure that the MediaFoundation is started up.
}
/// <summary>
/// Initializes a new instance of the <see cref="MFMediaBuffer"/> class with the specified maximum <paramref name="size"/>.
/// </summary>
/// <param name="size">The size of the <see cref="MFMediaBuffer"/> in bytes. The specified <paramref name="size"/> will be the <see cref="MaxLength"/> of the constructed <see cref="MFMediaBuffer"/>.</param>
/// <remarks>The caller needs to release the allocated memory by disposing the <see cref="MFMediaBuffer"/>.</remarks>
public MFMediaBuffer(int size)
: this(MediaFoundationCore.CreateMemoryBuffer(size))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="MFByteStream"/> class which acts as a wrapper for the specified <paramref name="stream"/> to use it in a media foundation context.
/// </summary>
/// <param name="stream">The stream to wrap for media foundation usage.</param>
public MFByteStream(Stream stream)
: this(MediaFoundationCore.StreamToByteStreamNative(stream))
{
}
static MediaFoundationEncoder()
{
MediaFoundationCore.Startup();
}
private MFSourceReader Initialize(IMFByteStream stream)
{
MediaFoundationCore.Startup();
return(Initialize(MediaFoundationCore.CreateSourceReaderFromByteStream(stream, IntPtr.Zero)));
}
public static MFMediaType CreateEmpty()
{
MediaFoundationCore.Startup();
return(MediaFoundationCore.CreateMediaType());
}
private MFSourceReader Initialize(MFByteStream byteStream)
{
return(Initialize(MediaFoundationCore.CreateSourceReaderFromByteStream(byteStream.BasePtr, IntPtr.Zero)));
}
/// <summary>
/// Initializes a new instance of the <see cref="MFSinkWriter"/> class with a underlying <paramref name="byteStream"/>.
/// </summary>
/// <param name="byteStream">The underlying <see cref="MFByteStream"/> to use.</param>
/// <param name="attributes">Attributes to configure the <see cref="MFSinkWriter"/>. For more information, see <see href="https://msdn.microsoft.com/en-us/library/windows/desktop/dd389284(v=vs.85).aspx"/>. Use null/nothing as the default value.</param>
public MFSinkWriter(MFByteStream byteStream, MFAttributes attributes = null)
: this(MediaFoundationCore.CreateSinkWriterFromMFByteStreamNative(byteStream, attributes))
{
}
/// <summary>
/// Initializes a new instance of the <see cref="MFSample"/> class.
/// </summary>
/// <remarks>Calls the MFCreateSample function.</remarks>
public MFSample()
: this(MediaFoundationCore.CreateEmptySample())
{
}
/// <summary>
/// Initializes a new instance of the <see cref="MFSourceReader"/> class based on a given <paramref name="url"/>.
/// </summary>
/// <param name="url">The URL.</param>
public MFSourceReader(string url)
: this(MediaFoundationCore.CreateSourceReaderFromUrlNative(url))
{
}
public static MFMediaType FromWaveFormat(WaveFormat waveFormat)
{
MediaFoundationCore.Startup();
return(MediaFoundationCore.MediaTypeFromWaveFormat(waveFormat));
}
/// <summary>
/// Initializes a new instance of the <see cref="MFByteStream"/> class which acts as a wrapper for the specified <paramref name="stream"/> to use it in a media foundation context.
/// </summary>
/// <param name="stream">The stream to wrap for media foundation usage.</param>
/// <param name="closeStreamOnDispose">A value indicating whether the <paramref name="stream"/> should be closed when the
/// <see cref="Dispose"/> method is being called.</param>
public MFByteStream(Stream stream, bool closeStreamOnDispose)
: this(MediaFoundationCore.StreamToByteStreamNative(stream, closeStreamOnDispose))
{
}
