/// <summary>
/// Creates a memory buffer of the specified size
/// </summary>
/// <param name="bufferSize">Memory buffer size in bytes</param>
/// <returns>The memory buffer</returns>
public static IMFMediaBuffer CreateMemoryBuffer(int bufferSize)
{
IMFMediaBuffer buffer;
MediaFoundationInterop.MFCreateMemoryBuffer(bufferSize, out buffer);
return(buffer);
}
public static IMFMediaType CreateMediaType()
{
IMFMediaType result;
MediaFoundationInterop.MFCreateMediaType(out result);
return(result);
}
/// <summary>
/// Creates a new attributes store
/// </summary>
/// <param name="initialSize">Initial size</param>
/// <returns>The attributes store</returns>
public static IMFAttributes CreateAttributes(int initialSize)
{
IMFAttributes attributes;
MediaFoundationInterop.MFCreateAttributes(out attributes, initialSize);
return(attributes);
}
/// <summary>
/// Creates a sample object
/// </summary>
/// <returns>The sample object</returns>
public static IMFSample CreateSample()
{
IMFSample sample;
MediaFoundationInterop.MFCreateSample(out sample);
return(sample);
}
/// <summary>
/// Creates a source reader based on a byte stream
/// </summary>
/// <param name="byteStream">The byte stream</param>
/// <returns>A media foundation source reader</returns>
public static IMFSourceReader CreateSourceReaderFromByteStream(IMFByteStream byteStream)
{
IMFSourceReader reader;
MediaFoundationInterop.MFCreateSourceReaderFromByteStream(byteStream, null, out reader);
return(reader);
}
/// <summary>
/// Creates a media foundation byte stream based on a stream object
/// (usable with WinRT streams)
/// </summary>
/// <param name="stream">The input stream</param>
/// <returns>A media foundation byte stream</returns>
public static IMFByteStream CreateByteStream(object stream)
{
IMFByteStream byteStream;
MediaFoundationInterop.MFCreateMFByteStreamOnStreamEx(stream, out byteStream);
return(byteStream);
}
/// <summary>
/// Creates a Media type
/// </summary>
public static IMFMediaType CreateMediaType()
{
IMFMediaType mediaType;
MediaFoundationInterop.MFCreateMediaType(out mediaType);
return(mediaType);
}
public static IMFAttributes CreateAttributes(int initialSize)
{
IMFAttributes result;
MediaFoundationInterop.MFCreateAttributes(out result, initialSize);
return(result);
}
public static IMFSample CreateSample()
{
IMFSample result;
MediaFoundationInterop.MFCreateSample(out result);
return(result);
}
/// <summary>
/// initializes MediaFoundation - only needs to be called once per process
/// </summary>
public static void Startup()
{
if (!initialized)
{
MediaFoundationInterop.MFStartup(MediaFoundationInterop.MF_VERSION, 0);
initialized = true;
}
}
/// <summary>
/// uninitializes MediaFoundation
/// </summary>
public static void Shutdown()
{
if (initialized)
{
MediaFoundationInterop.MFShutdown();
initialized = false;
}
}
public static IEnumerable <IMFActivate> EnumDeviceSources()
{
IMFAttributes devtype = CreateAttributes(2);
Guid MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_AUDCAP_GUID = new Guid(0x14dd9a1c, 0x7cff, 0x41be, 0xb1, 0xb9, 0xba, 0x1a, 0xc6, 0xec, 0xb5, 0x71);
devtype.SetGUID(MediaFoundationAttributes.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_AUDCAP_GUID);
MediaFoundationInterop.MFEnumDeviceSources(devtype, out IMFActivate[] sources, out _);
foreach (var i in sources)
{
yield return(i);
}
}
public static void Startup()
{
if (!MediaFoundationApi.initialized)
{
int num = 2;
OperatingSystem osversion = Environment.OSVersion;
if (osversion.Version.Major == 6 && osversion.Version.Minor == 0)
{
num = 1;
}
MediaFoundationInterop.MFStartup(num << 16 | 112, 0);
MediaFoundationApi.initialized = true;
}
}
/// <summary>
/// Processes the media session event.
/// </summary>
private void ProcessEvent()
{
while (m_Session != null)
{
try {
m_Session.GetEvent(1, out IMFMediaEvent _event);//requests events and returns immediately
_event.GetType(out MediaEventType eventtype);
switch (eventtype)
{
case MediaEventType.MESessionEnded:
PlaybackState = PlaybackState.Stopped;
PlaybackStopped?.Invoke(this, new StoppedEventArgs());
break;
case MediaEventType.MESessionTopologyStatus: //topology loaded
Guid guidManager = typeof(IAudioSessionManager).GUID;
(new MMDeviceEnumeratorComObject() as IMMDeviceEnumerator).
GetDefaultAudioEndpoint(CoreAudioApi.DataFlow.Render, CoreAudioApi.Role.Multimedia, out IMMDevice endoint);
endoint.Activate(ref guidManager, ClsCtx.ALL, IntPtr.Zero, out object _manager);
IAudioSessionManager manager = _manager as IAudioSessionManager;
manager.GetSimpleAudioVolume(Guid.Empty, 0, out m_volume);
m_Session.GetClock(out m_clock);
Guid guid_ratecontrol = typeof(IMFRateControl).GUID;
Guid MF_RATE_CONTROL_SERVICE = Guid.Parse("866fa297-b802-4bf8-9dc9-5e3b6a9f53c9");
MediaFoundationInterop.MFGetService(m_Session, ref MF_RATE_CONTROL_SERVICE, ref guid_ratecontrol, out object _control); //gets rate control
m_rate = _control as IMFRateControl;
Prepared = true;
break;
}
_event = null;
}
catch (COMException e)
{
if (e.HResult == MediaFoundationErrors.MF_E_NO_EVENTS_AVAILABLE)
{
continue;
}
else
{
throw e;
}
}
catch (ThreadAbortException)
{
break;
}
}
}
/// <summary>
/// Creates a media type from a WaveFormat
/// </summary>
public static IMFMediaType CreateMediaTypeFromWaveFormat(WaveFormat waveFormat)
{
var mediaType = CreateMediaType();
try
{
MediaFoundationInterop.MFInitMediaTypeFromWaveFormatEx(mediaType, waveFormat, Marshal.SizeOf(waveFormat));
}
catch (Exception)
{
Marshal.ReleaseComObject(mediaType);
throw;
}
return(mediaType);
}
/// <summary>
/// initializes MediaFoundation - only needs to be called once per process
/// </summary>
public static void Startup()
{
if (!initialized)
{
var sdkVersion = MediaFoundationInterop.MF_SDK_VERSION;
#if !NETFX_CORE
var os = Environment.OSVersion;
if (os.Version.Major == 6 && os.Version.Minor == 0)
{
sdkVersion = 1;
}
#endif
MediaFoundationInterop.MFStartup((sdkVersion << 16) | MediaFoundationInterop.MF_API_VERSION, 0);
initialized = true;
}
}
/// <summary>
/// Creates a media foundation byte stream based on a stream object
/// (usable with WinRT streams)
/// </summary>
/// <param name="stream">The input stream</param>
/// <returns>A media foundation byte stream</returns>
public static IMFByteStream CreateByteStream(object stream)
{
IMFByteStream byteStream;
#if NETFX_CORE
MediaFoundationInterop.MFCreateMFByteStreamOnStreamEx(stream, out byteStream);
#else
if (stream is IStream)
{
MediaFoundationInterop.MFCreateMFByteStreamOnStream(stream as IStream, out byteStream);
}
else
{
throw new ArgumentException("Stream must be IStream in desktop apps");
}
#endif
return(byteStream);
}
private void SetFormat(WaveFormat format)
{
source.CreatePresentationDescriptor(out IMFPresentationDescriptor descriptor);
descriptor.GetStreamDescriptorCount(out uint sdcount);
bool hasaudio = false;
for (uint i = 0; i < sdcount; i++)
{
descriptor.GetStreamDescriptorByIndex(i, out _, out IMFStreamDescriptor sd);
descriptor.SelectStream(i);
sd.GetMediaTypeHandler(out IMFMediaTypeHandler typeHandler);
typeHandler.GetMediaTypeByIndex(0, out IMFMediaType mediaType);
mediaType.GetMajorType(out Guid streamtype);
if (streamtype == MediaTypes.MFMediaType_Audio)
{
try
{
mediaType.SetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_SAMPLES_PER_SECOND, format.SampleRate);//SampleRate
mediaType.SetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_NUM_CHANNELS, format.Channels);
mediaType.SetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_BITS_PER_SAMPLE, format.BitsPerSample);
mediaType.SetGUID(MediaFoundationAttributes.MF_MT_SUBTYPE, AudioSubtypes.MFAudioFormat_PCM);
}
catch (COMException)
{
throw new InvalidOperationException("Can't configure the source with specific format.");
}
hasaudio = true;
}
else
{
continue;
}
}
if (!hasaudio)
{
throw new ArgumentException("The device doesn't have audio stream.");
}
this.format = format;
IMFAttributes readerattr = MediaFoundationApi.CreateAttributes(2);
readerattr.SetUnknown(MediaFoundationAttributes.MF_SOURCE_READER_ASYNC_CALLBACK, callback);
MediaFoundationInterop.MFCreateSourceReaderFromMediaSource(source, readerattr, out IMFSourceReader _sourceReader);
sourceReader = _sourceReader as IMFSourceReader2;
}
//#if !NETFX_CORE
/// <summary>
/// Enumerate the installed MediaFoundation transforms in the specified category
/// </summary>
/// <param name="category">A category from MediaFoundationTransformCategories</param>
/// <returns></returns>
public static IEnumerable <IMFActivate> EnumerateTransforms(Guid category)
{
MediaFoundationInterop.MFTEnumEx(category, _MFT_ENUM_FLAG.MFT_ENUM_FLAG_ALL,
null, null, out var interfacesPointer, out var interfaceCount);
var interfaces = new IMFActivate[interfaceCount];
for (int n = 0; n < interfaceCount; n++)
{
var ptr =
Marshal.ReadIntPtr(new IntPtr(interfacesPointer.ToInt64() + n * Marshal.SizeOf(interfacesPointer)));
interfaces[n] = (IMFActivate)Marshal.GetObjectForIUnknown(ptr);
}
foreach (var i in interfaces)
{
yield return(i);
}
Marshal.FreeCoTaskMem(interfacesPointer);
}
public static IEnumerable <IMFActivate> EnumerateTransforms(Guid category)
{
IntPtr interfacesPointer;
int interfaceCount;
MediaFoundationInterop.MFTEnumEx(category, _MFT_ENUM_FLAG.MFT_ENUM_FLAG_ALL, null, null, out interfacesPointer, out interfaceCount);
IMFActivate[] interfaces = new IMFActivate[interfaceCount];
for (int j = 0; j < interfaceCount; j++)
{
IntPtr pUnk = Marshal.ReadIntPtr(new IntPtr(interfacesPointer.ToInt64() + (long)(j * Marshal.SizeOf(interfacesPointer))));
interfaces[j] = (IMFActivate)Marshal.GetObjectForIUnknown(pUnk);
}
foreach (IMFActivate i in interfaces)
{
yield return(i);
}
Marshal.FreeCoTaskMem(interfacesPointer);
yield break;
}
private void Load()
{
MediaFoundationInterop.MFCreateSourceResolver(out IMFSourceResolver resolver);
object unknown;
try
{
resolver.CreateObjectFromURL(URL, SourceResolverFlags.MF_RESOLUTION_MEDIASOURCE | SourceResolverFlags.MF_RESOLUTION_CONTENT_DOES_NOT_HAVE_TO_MATCH_EXTENSION_OR_MIME_TYPE,
null, out _, out unknown);
}
catch
{
throw new ArgumentException("Unsupported type.");
}
MediaFoundationInterop.MFCreateMediaSession(IntPtr.Zero, out m_Session);
MediaFoundationInterop.MFCreateTopology(out IMFTopology topo);
IMFMediaSource source = unknown as IMFMediaSource;
source.CreatePresentationDescriptor(out m_pDescriptor);
m_pDescriptor.GetUINT64(MediaFoundationAttributes.MF_PD_DURATION, out long dur);
m_Duration = dur / 10000000;
m_pDescriptor.GetStreamDescriptorCount(out uint sdcount);
m_streamcount = (int)sdcount;
for (uint i = 0; i < m_streamcount; i++)
{
m_pDescriptor.GetStreamDescriptorByIndex(i, out bool IsSelected, out IMFStreamDescriptor sd);
m_DefaultStreamSelect.Add(IsSelected);
switch (StreamSelectFlag)
{
case StreamSelectFlags.SelectAllStream:
if (!IsSelected)
{
m_pDescriptor.SelectStream(i);
}
break;
case StreamSelectFlags.SelectNone:
if (IsSelected)
{
m_pDescriptor.DeselectStream(i);
}
break;
}
sd.GetMediaTypeHandler(out IMFMediaTypeHandler typeHandler);
typeHandler.GetMediaTypeByIndex(0, out IMFMediaType mediaType);
mediaType.GetMajorType(out Guid streamtype);
IMFActivate renderer;
if (streamtype == MediaTypes.MFMediaType_Audio)
{
MediaFoundationInterop.MFCreateAudioRendererActivate(out renderer);
mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_SAMPLES_PER_SECOND, out int rate);//SampleRate
mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_NUM_CHANNELS, out int channelcount);
int samplesize;
try
{
mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_BITS_PER_SAMPLE, out samplesize);
}
catch (COMException e)
{
if ((uint)e.HResult != 0xC00D36E6)
{
throw e;
}
else
{
samplesize = 8;
}
}
m_format.Add(new WaveFormat(rate, samplesize, channelcount));
}
else
{
continue;
}
MediaFoundationInterop.MFCreateTopologyNode(MF_TOPOLOGY_TYPE.MF_TOPOLOGY_SOURCESTREAM_NODE, out IMFTopologyNode sourcenode);
sourcenode.SetUnknown(MediaFoundationAttributes.MF_TOPONODE_SOURCE, source);
sourcenode.SetUnknown(MediaFoundationAttributes.MF_TOPONODE_PRESENTATION_DESCRIPTOR, m_pDescriptor);
sourcenode.SetUnknown(MediaFoundationAttributes.MF_TOPONODE_STREAM_DESCRIPTOR, sd);
topo.AddNode(sourcenode);
MediaFoundationInterop.MFCreateTopologyNode(MF_TOPOLOGY_TYPE.MF_TOPOLOGY_OUTPUT_NODE, out IMFTopologyNode outputnode);
outputnode.SetObject(renderer);
topo.AddNode(outputnode);
sourcenode.ConnectOutput(0, outputnode, 0);
}
m_Session.SetTopology(0, topo);
m_Eventthread = new Thread(ProcessEvent);
m_Eventthread.Start();
}
/// <summary>
/// Loads IWaveProvider.
/// </summary>
/// <param name="waveProvider">The waveProvider to be loaded.</param>
public void Init(IWaveProvider waveProvider)
{
MediaFoundationApi.Startup();
m_sourcewave = waveProvider;
int readcount;
MemoryStream msByteStrem = new MemoryStream();
byte[] _data;
do
{
readcount = 0;
_data = new byte[32767];
readcount = waveProvider.Read(_data, 0, _data.Length);
if (readcount < 0)
{
continue;
}
msByteStrem.Write(_data, 0, readcount);
} while (readcount >= _data.Length | readcount < 0);//Creates a IMFByteStream and fills it with the data in waveProvider.
ComStream csByteStream = new ComStream(msByteStrem);
IMFByteStream mfByteStream = MediaFoundationApi.CreateByteStream(csByteStream);
MediaFoundationInterop.MFCreateSourceResolver(out IMFSourceResolver resolver);
IMFAttributes streamattributes = mfByteStream as IMFAttributes;
mfByteStream.GetLength(out long _length);
resolver.CreateObjectFromByteStream(mfByteStream, null, SourceResolverFlags.MF_RESOLUTION_MEDIASOURCE
| SourceResolverFlags.MF_RESOLUTION_CONTENT_DOES_NOT_HAVE_TO_MATCH_EXTENSION_OR_MIME_TYPE, null, out _, out object _source);//Turns the stream to IMFMediaSource
IMFMediaSource source = _source as IMFMediaSource;
source.CreatePresentationDescriptor(out IMFPresentationDescriptor descriptor);
MediaFoundationInterop.MFCreateTopology(out IMFTopology topo);
descriptor.GetStreamDescriptorCount(out uint sdcount);
for (uint i = 0; i < sdcount; i++)//For each stream in the source,creates renderer and adds to the topology.
{
descriptor.GetStreamDescriptorByIndex(i, out bool IsSelected, out IMFStreamDescriptor sd);
if (!IsSelected)
{
if (SelectAllStream)
{
descriptor.SelectStream(i);
}
else
{
continue;
}
}
sd.GetMediaTypeHandler(out IMFMediaTypeHandler typeHandler);
typeHandler.GetMajorType(out Guid streamtype);
IMFActivate renderer;
if (streamtype == MediaTypes.MFMediaType_Audio)
{
MediaFoundationInterop.MFCreateAudioRendererActivate(out renderer);//Creates renderer for audio streams
}
else
{
continue;
}
//Creats and equips the topology nodes of the certain stream
MediaFoundationInterop.MFCreateTopologyNode(MF_TOPOLOGY_TYPE.MF_TOPOLOGY_SOURCESTREAM_NODE, out IMFTopologyNode sourcenode);
sourcenode.SetUnknown(MediaFoundationAttributes.MF_TOPONODE_SOURCE, source);
sourcenode.SetUnknown(MediaFoundationAttributes.MF_TOPONODE_PRESENTATION_DESCRIPTOR, descriptor);
sourcenode.SetUnknown(MediaFoundationAttributes.MF_TOPONODE_STREAM_DESCRIPTOR, sd);
topo.AddNode(sourcenode);
MediaFoundationInterop.MFCreateTopologyNode(MF_TOPOLOGY_TYPE.MF_TOPOLOGY_OUTPUT_NODE, out IMFTopologyNode outputnode);
outputnode.SetObject(renderer);
topo.AddNode(outputnode);
sourcenode.ConnectOutput(0, outputnode, 0);
}
MediaFoundationInterop.MFCreateMediaSession(IntPtr.Zero, out m_Session);
m_Session.SetTopology(0, topo);
m_eventthread = new Thread(ProcessEvent);
m_eventthread.Start();
}
/// <summary>
/// Initialize the MediaFoundationProvider with specific file.
/// </summary>
public MediaFoundationProvider(string url)
{
MediaFoundationApi.Startup();
if (!File.Exists(url))
{
throw new FileNotFoundException("This file doesn't exist");
}
MediaFoundationInterop.MFCreateSourceResolver(out IMFSourceResolver resolver);
//Creates both IMFMediaSource and IMFByteStream.Uses the stream for 'Read' method and uses the source to collect format information.
resolver.CreateObjectFromURL(url, SourceResolverFlags.MF_RESOLUTION_BYTESTREAM | SourceResolverFlags.MF_RESOLUTION_CONTENT_DOES_NOT_HAVE_TO_MATCH_EXTENSION_OR_MIME_TYPE, null, out _, out object _stream);
IMFByteStream byteStream = _stream as IMFByteStream;
resolver.CreateObjectFromByteStream(byteStream, null, SourceResolverFlags.MF_RESOLUTION_MEDIASOURCE | SourceResolverFlags.MF_RESOLUTION_CONTENT_DOES_NOT_HAVE_TO_MATCH_EXTENSION_OR_MIME_TYPE, null, out _, out object _source);
Marshal.FinalReleaseComObject(resolver);
IMFMediaSource source = _source as IMFMediaSource;
source.CreatePresentationDescriptor(out IMFPresentationDescriptor descriptor);
descriptor.GetStreamDescriptorCount(out uint sdcount);
for (uint i = 0; i < sdcount; i++)
{
descriptor.GetStreamDescriptorByIndex(i, out _, out IMFStreamDescriptor sd);
sd.GetMediaTypeHandler(out IMFMediaTypeHandler typeHandler);
typeHandler.GetMediaTypeByIndex(0, out IMFMediaType mediaType);
mediaType.GetMajorType(out Guid streamtype);
if (streamtype == MediaTypes.MFMediaType_Audio)
{
mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_SAMPLES_PER_SECOND, out int rate);//SampleRate
mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_NUM_CHANNELS, out int channelcount);
int samplesize;
try
{
mediaType.GetUINT32(MediaFoundationAttributes.MF_MT_AUDIO_BITS_PER_SAMPLE, out samplesize);
}
catch (COMException e)
{
if ((uint)e.HResult != 0xC00D36E6)
{
throw e;
}
else
{
samplesize = 8;
}
}
WaveFormat = new WaveFormat(rate, samplesize, channelcount);
}
else
{
continue;
}
}
byteStream.GetLength(out streamlength);
byteStream.SetCurrentPosition(0);
//Moves all the bytes in IMFByteStream to MemoryStream.
MediaFoundationInterop.MFCreateMemoryBuffer(unchecked ((int)streamlength), out IMFMediaBuffer mediabuffer);
mediabuffer.Lock(out IntPtr pbuffer, out int length, out _);
byteStream.Read(pbuffer, length, out _);
byte[] buffer = new byte[length];
Marshal.Copy(pbuffer, buffer, 0, length);
datastream = new MemoryStream(buffer);
}