static IMFMetadata GetMetadata(IMFMediaSource mediaSource)
{
HResult hr;
// Get IMFPresentationDescriptor.
IMFPresentationDescriptor presentationDescriptor;
hr = mediaSource.CreatePresentationDescriptor(out presentationDescriptor);
MFError.ThrowExceptionForHR(hr);
// Get IMFMetadataProvider.
object provider;
hr = MFExtern.MFGetService(mediaSource, MFServices.MF_METADATA_PROVIDER_SERVICE, typeof(IMFMetadataProvider).GUID, out provider);
MFError.ThrowExceptionForHR(hr);
IMFMetadataProvider metadataProvider = (IMFMetadataProvider)provider;
// Get IMFMetadata.
IMFMetadata metadata;
hr = metadataProvider.GetMFMetadata(presentationDescriptor, 0, 0, out metadata);
MFError.ThrowExceptionForHR(hr);
COMBase.SafeRelease(presentationDescriptor);
presentationDescriptor = null;
COMBase.SafeRelease(metadataProvider);
metadataProvider = null;
return(metadata);
}
///////////////////////////////////////////////////////////////////////
// Name: CreateMediaSource
// Description: Create a media source from a URL.
//
// sURL: The URL to open.
// ppSource: Receives a pointer to the media source.
///////////////////////////////////////////////////////////////////////
static void CreateMediaSource(string sURL, out IMFMediaSource ppSource)
{
int hr;
IMFSourceResolver pSourceResolver;
object pSourceUnk;
// Create the source resolver.
hr = MFExtern.MFCreateSourceResolver(out pSourceResolver);
MFError.ThrowExceptionForHR(hr);
try
{
// Use the source resolver to create the media source.
MFObjectType ObjectType = MFObjectType.Invalid;
hr = pSourceResolver.CreateObjectFromURL(
sURL, // URL of the source.
MFResolution.MediaSource, // Create a source object.
null, // Optional property store.
out ObjectType, // Receives the object type.
out pSourceUnk // Receives a pointer to the source.
);
MFError.ThrowExceptionForHR(hr);
// Get the IMFMediaSource interface from the media source.
ppSource = (IMFMediaSource)pSourceUnk;
}
finally
{
// Clean up.
if (pSourceResolver != null)
{
Marshal.ReleaseComObject(pSourceResolver);
}
}
}
static int GetBitRate(IMFMediaSource mediaSource)
{
HResult hr;
// Get IMFPresentationDescriptor.
IMFPresentationDescriptor presentationDescriptor;
hr = mediaSource.CreatePresentationDescriptor(out presentationDescriptor);
MFError.ThrowExceptionForHR(hr);
// Get IMFStreamDescriptor.
bool isStreamSelected;
IMFStreamDescriptor streamDescriptor;
hr = presentationDescriptor.GetStreamDescriptorByIndex(0, out isStreamSelected, out streamDescriptor);
MFError.ThrowExceptionForHR(hr);
// Get bit rate.
int bitRate;
hr = streamDescriptor.GetUINT32(MFAttributesClsid.MF_SD_ASF_EXTSTRMPROP_AVG_DATA_BITRATE, out bitRate);
MFError.ThrowExceptionForHR(hr);
bitRate /= 1000;
if (bitRate <= 0)
{
throw new ApplicationException($"Invalid bit rate: {bitRate}");
}
return(bitRate);
}
private void CreateVideoCaptureSource()
{
try
{
if (VideoCaptureDevice == null)
{
Trace.WriteLine("Error no videocapturedevice set");
return;
}
//VideoCaptureSource
IMFAttributes pAttributes = null;
int hr = MFExtern.MFCreateAttributes(out pAttributes, 2);
hr = pAttributes.SetGUID(MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, CLSID.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
MFError.ThrowExceptionForHR(hr);
hr = pAttributes.SetString(MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_SYMBOLIC_LINK, VideoCaptureDevice.DevicePath);
MFError.ThrowExceptionForHR(hr);
IMFMediaSource ppMediaSource = null;
hr = MFExtern.MFCreateDeviceSource(pAttributes, out ppMediaSource);
MFError.ThrowExceptionForHR(hr);
m_pSource = ppMediaSource;
//GetCaptureFormats(m_pSource);
}
catch (Exception e)
{
Marshal.GetHRForException(e);
Trace.WriteLine("SetupGraph Exception " + e.ToString());
}
}
private int OpenMediaSource(IMFMediaSource pSource, ref IMFSourceReaderAsync pReaderAsync)
{
// Create an attribute store to hold initialization settings.
IMFAttributes pAttributes;
var hr = MFExtern.MFCreateAttributes(out pAttributes, 2);
//if (Succeeded(hr))
//{
// hr = pAttributes.SetUINT32(MFAttributesClsid.MF_READWRITE_DISABLE_CONVERTERS, 1);
//}
if (Succeeded(hr))
{
hr = pAttributes.SetUnknown(MFAttributesClsid.MF_SOURCE_READER_ASYNC_CALLBACK, this);
}
if (Succeeded(hr))
{
IMFSourceReader pReader;
hr = MFExtern.MFCreateSourceReaderFromMediaSource(pSource, pAttributes, out pReader);
// ReSharper disable once SuspiciousTypeConversion.Global
pReaderAsync = (IMFSourceReaderAsync)pReader;
}
SafeRelease(pAttributes);
return(hr);
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::CreateSourceNode (Private)
// Description:
// Creates the source node for a stream
// Parameter:
// pPresentationDescriptor: [in] Pointer to the presentation descriptor for the media source
// pStreamDescriptor: [in] Stream descriptor for the stream
// pMediaSource: [in] Pointer to the media source
// ppSourceNode: [out] Receives a pointer to the new node
///////////////////////////////////////////////////////////////////////////////////////////
private void CreateSourceNode(
IMFPresentationDescriptor pPresentationDescriptor,
IMFStreamDescriptor pStreamDescriptor,
IMFMediaSource pMediaSource,
out IMFTopologyNode ppSourceNode)
{
if (pPresentationDescriptor == null || pMediaSource == null || pStreamDescriptor == null)
{
throw new COMException("null pointer", (int)HResult.E_POINTER);
}
HResult hr;
// Create the source-stream node.
hr = MFExtern.MFCreateTopologyNode(MFTopologyType.SourcestreamNode, out ppSourceNode);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the media source. Necessary.
hr = ppSourceNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_SOURCE, pMediaSource);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the presentation descriptor. Necessary.
hr = ppSourceNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_PRESENTATION_DESCRIPTOR, pPresentationDescriptor);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the stream descriptor. Necessary.
hr = ppSourceNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_STREAM_DESCRIPTOR, pStreamDescriptor);
MFError.ThrowExceptionForHR(hr);
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::CreateTopology (Private)
// Description:
// Creates a topology for the media source
// Parameter:
// pMediaSource: [in] Pointer to the media source
// pTopology: [in] Receives the partial topology
/////////////////////////////////////////////////////////////////////////////////////////
private void CreateTopology(
IMFMediaSource pMediaSource,
IMFTopology pTopology)
{
Debug.WriteLine("CPlayer::CreateTopology");
//The caller needs to pass a valid media source
//We need the media source because to set the source node attribute, media source is needed
if (pMediaSource == null || pTopology == null)
{
throw new COMException("null pointer", (int)HResult.E_POINTER);
}
IMFPresentationDescriptor pPresentationDescriptor;
//Create Presentation Descriptor for the media source
HResult hr = pMediaSource.CreatePresentationDescriptor(out pPresentationDescriptor);
MFError.ThrowExceptionForHR(hr);
try
{
CreateNodesForStream(pPresentationDescriptor, pMediaSource, pTopology);
}
finally
{
SafeRelease(pPresentationDescriptor);
}
}
protected void CreateMediaSource(string sURL)
{
IMFSourceResolver pSourceResolver;
object pSource;
// Create the source resolver.
HResult hr = MFExtern.MFCreateSourceResolver(out pSourceResolver);
MFError.ThrowExceptionForHR(hr);
try
{
// Use the source resolver to create the media source.
MFObjectType ObjectType = MFObjectType.Invalid;
hr = pSourceResolver.CreateObjectFromURL(
sURL, // URL of the source.
MFResolution.MediaSource, // Create a source object.
null, // Optional property store.
out ObjectType, // Receives the created object type.
out pSource // Receives a pointer to the media source.
);
MFError.ThrowExceptionForHR(hr);
// Get the IMFMediaSource interface from the media source.
m_pSource = (IMFMediaSource)pSource;
}
finally
{
// Clean up
Marshal.ReleaseComObject(pSourceResolver);
}
}
private HResult OpenMediaSource(IMFMediaSource pSource)
{
HResult hr = HResult.S_OK;
IMFAttributes pAttributes = null;
hr = MFExtern.MFCreateAttributes(out pAttributes, 2);
if (Succeeded(hr))
{
hr = pAttributes.SetUnknown(MFAttributesClsid.MF_SOURCE_READER_ASYNC_CALLBACK, this);
}
if (Succeeded(hr))
{
IMFSourceReader pReader;
hr = MFExtern.MFCreateSourceReaderFromMediaSource(
pSource,
pAttributes,
out pReader
);
m_pReader = (IMFSourceReaderAsync)pReader;
}
SafeRelease(pAttributes);
return(hr);
}
private static HResult CreateSourceStreamNode(IMFMediaSource source, IMFStreamDescriptor streamDescriptor, IMFPresentationDescriptor presentationDescriptor, out IMFTopologyNode node)
{
HResult hr = S_OK;
node = null;
hr = MF.CreateTopologyNode(MFTopologyType.SourcestreamNode, out node);
if (Failed(hr))
{
return(hr);
}
hr = node.SetUnknown(MF_TOPONODE_SOURCE, source);
if (Failed(hr))
{
SafeRelease(node);
return(hr);
}
hr = node.SetUnknown(MF_TOPONODE_PRESENTATION_DESCRIPTOR, presentationDescriptor);
if (Failed(hr))
{
SafeRelease(node);
return(hr);
}
hr = node.SetUnknown(MF_TOPONODE_STREAM_DESCRIPTOR, streamDescriptor);
if (Failed(hr))
{
SafeRelease(node);
return(hr);
}
return(hr);
}
//////////////////////////////////////////////////////////////////////
// Name: CreateSourceNode
// Creates a source node for a media stream.
//
// pSource: Pointer to the media source.
// pSourcePD: Pointer to the source's presentation descriptor.
// pSourceSD: Pointer to the stream descriptor.
// ppNode: Receives the IMFTopologyNode pointer.
///////////////////////////////////////////////////////////////////////
static void CreateSourceNode(
IMFMediaSource pSource, // Media source.
IMFPresentationDescriptor pPD, // Presentation descriptor.
IMFStreamDescriptor pSD, // Stream descriptor.
out IMFTopologyNode ppNode // Receives the node pointer.
)
{
HResult hr;
// Create the node.
hr = MFExtern.MFCreateTopologyNode(
MFTopologyType.SourcestreamNode,
out ppNode);
MFError.ThrowExceptionForHR(hr);
// Set the attributes.
hr = ppNode.SetUnknown(
MFAttributesClsid.MF_TOPONODE_SOURCE,
pSource);
MFError.ThrowExceptionForHR(hr);
hr = ppNode.SetUnknown(
MFAttributesClsid.MF_TOPONODE_PRESENTATION_DESCRIPTOR,
pPD);
MFError.ThrowExceptionForHR(hr);
hr = ppNode.SetUnknown(
MFAttributesClsid.MF_TOPONODE_STREAM_DESCRIPTOR,
pSD);
MFError.ThrowExceptionForHR(hr);
}
///////////////////////////////////////////////////////////////////////
// Name: CreateSourceStreamNode
// Description: Creates a source-stream node for a stream.
//
// pSource: Media source.
// pSourcePD: Presentation descriptor for the media source.
// pSourceSD: Stream descriptor for the stream.
// ppNode: Receives a pointer to the new node.
//
// Pre-conditions: Create the media source.
/////////////////////////////////////////////////////////////////////////
void CreateSourceStreamNode(
IMFMediaSource pSource,
IMFPresentationDescriptor pSourcePD,
IMFStreamDescriptor pSourceSD,
out IMFTopologyNode ppNode
)
{
HResult hr;
// Create the source-stream node.
hr = MFExtern.MFCreateTopologyNode(MFTopologyType.SourcestreamNode, out ppNode);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the media source.
hr = ppNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_SOURCE, pSource);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the presentation descriptor.
hr = ppNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_PRESENTATION_DESCRIPTOR, pSourcePD);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the stream descriptor.
hr = ppNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_STREAM_DESCRIPTOR, pSourceSD);
MFError.ThrowExceptionForHR(hr);
}
//-------------------------------------------------------------------
// SetDevice
//
// Set up preview for a specified video capture device.
//-------------------------------------------------------------------
public int SetDevice(MfDevice pDevice, ref string format)
{
int hr;
IMFMediaSource pSource = null;
lock (LockSync)
{
try
{
// Release the current device, if any.
hr = CloseDevice();
pActivate = pDevice.Activator;
object o = null;
if (Succeeded(hr))
{
// Create the media source for the device.
hr = pActivate.ActivateObject(typeof(IMFMediaSource).GUID, out o);
}
if (Succeeded(hr))
{
pSource = (IMFMediaSource)o;
}
// Get Symbolic device link
PwszSymbolicLink = pDevice.SymbolicName;
// Create the source reader.
if (Succeeded(hr))
{
hr = OpenMediaSource(pSource, ref PReader);
}
if (Succeeded(hr))
{
var index = GetOptimizedFormatIndex(ref format);
if (index >= 0)
{
hr = ConfigureSourceReader(index);
}
}
if (Failed(hr))
{
pSource?.Shutdown();
//pActivate.ShutdownObject();
// NOTE: The source reader shuts down the media source
// by default, but we might not have gotten that far.
CloseDevice();
}
}
finally
{
SafeRelease(pSource);
}
}
return(hr);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// A centralized place to close down all media devices.
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
private void CloseAllMediaDevices()
{
HResult hr;
LogMessage("CloseAllMediaDevices");
// close and release our call back handler
if (mediaSessionAsyncCallbackHandler != null)
{
// stop any messaging or events in the call back handler
mediaSessionAsyncCallbackHandler.ShutDown();
mediaSessionAsyncCallbackHandler = null;
}
// close the session (this is NOT the same as shutting it down)
if (mediaSession != null)
{
hr = mediaSession.Close();
if (hr != HResult.S_OK)
{
// just log it
LogMessage("CloseAllMediaDevices call to mediaSession.Close failed. Err=" + hr.ToString());
}
}
// Shut down the media source
if (mediaSource != null)
{
hr = mediaSource.Shutdown();
if (hr != HResult.S_OK)
{
// just log it
LogMessage("CloseAllMediaDevices call to mediaSource.Shutdown failed. Err=" + hr.ToString());
}
Marshal.ReleaseComObject(mediaSource);
mediaSource = null;
}
// Shut down the media session (note we only closed it before).
if (mediaSession != null)
{
hr = mediaSession.Shutdown();
if (hr != HResult.S_OK)
{
// just log it
LogMessage("CloseAllMediaDevices call to mediaSession.Shutdown failed. Err=" + hr.ToString());
}
Marshal.ReleaseComObject(mediaSession);
mediaSession = null;
}
// close the media sink
if (mediaSink != null)
{
Marshal.ReleaseComObject(mediaSink);
mediaSink = null;
}
}
private void CloseAllMediaDevices()
{
HResult hr;
Console.WriteLine("CloseAllMediaDevices");
// close and release our call back handler
if (mediaSessionAsyncCallbackHandler != null)
{
// stop any messaging or events in the call back handler
mediaSessionAsyncCallbackHandler.ShutDown();
mediaSessionAsyncCallbackHandler = null;
}
// Shut down the source reader
if (StreamReader != null)
{
Marshal.ReleaseComObject(StreamReader);
StreamReader = null;
}
// close the session (this is NOT the same as shutting it down)
if (mediaSession != null)
{
hr = mediaSession.Close();
if (hr != HResult.S_OK)
{
// just log it
Console.WriteLine("CloseAllMediaDevices call to mediaSession.Close failed. Err=" + hr.ToString());
}
}
// Shut down the media source
if (MediaSource != null)
{
hr = MediaSource.Shutdown();
if (hr != HResult.S_OK)
{
// just log it
Console.WriteLine("CloseAllMediaDevices call to mediaSource.Shutdown failed. Err=" + hr.ToString());
}
Marshal.ReleaseComObject(MediaSource);
MediaSource = null;
}
// Shut down the media session (note we only closed it before).
if (mediaSession != null)
{
hr = mediaSession.Shutdown();
if (hr != HResult.S_OK)
{
// just log it
Console.WriteLine("CloseAllMediaDevices call to mediaSession.Shutdown failed. Err=" + hr.ToString());
}
Marshal.ReleaseComObject(mediaSession);
mediaSession = null;
}
if (currentVideoMediaType != null)
{
Marshal.ReleaseComObject(currentVideoMediaType);
currentVideoMediaType = null;
}
}
public SimpleFastEncode()
{
// Create objects and bind the background worker events
this.EncodeProgress = null;
this.presentationClock = null;
this.mediaSession = null;
this.mediaSource = null;
this.progressTimer = new Timer(500);
this.progressTimer.Elapsed += this.ProgressTimer_Tick;
}
///////////////////////////////////////////////////////////////////////
// Name: AddBranchToPartialTopology
// Description: Adds a topology branch for one stream.
//
// pTopology: Pointer to the topology object.
// hVideoWindow: Handle to the video window (for video streams).
// pSource: Media source.
// pSourcePD: The source's presentation descriptor.
// iStream: Index of the stream to render.
//
// Pre-conditions: The topology must be created already.
//
// Notes: For each stream, we must do the following:
// 1. Create a source node associated with the stream.
// 2. Create an output node for the renderer.
// 3. Connect the two nodes.
//
// Optionally we can also add an effect transform between the source
// and output nodes.
//
// The media session will resolve the topology, so we do not have
// to worry about decoders or color converters.
/////////////////////////////////////////////////////////////////////////
void AddBranchToPartialTopology(
IMFTopology pTopology,
IntPtr hVideoWindow,
IMFMediaSource pSource,
IMFPresentationDescriptor pSourcePD,
int iStream)
{
TRACE("Player::RenderStream");
IMFStreamDescriptor pSourceSD = null;
IMFTopologyNode pSourceNode = null;
MFError throwonhr;
Guid majorType;
bool fSelected = false;
// Get the stream descriptor for this stream.
throwonhr = pSourcePD.GetStreamDescriptorByIndex(iStream, out fSelected, out pSourceSD);
// First check if the stream is selected by default. If not, ignore it.
// More sophisticated applications can change the default selections.
if (fSelected)
{
try
{
// Create a source node for this stream.
CreateSourceStreamNode(pSource, pSourcePD, pSourceSD, out pSourceNode);
// Add the source node to the topology.
throwonhr = pTopology.AddNode(pSourceNode);
// Get the major media type for the stream.
GetStreamType(pSourceSD, out majorType);
if (majorType == MFMediaType.Video)
{
// For video, use the grayscale transform.
CreateVideoBranch(pTopology, pSourceNode, hVideoWindow, m_VideoEffect);
}
else if (majorType == MFMediaType.Audio)
{
if (!m_Audio)
{
CreateAudioBranch(pTopology, pSourceNode, m_AudioEffect);
}
}
}
finally
{
// Clean up.
SafeRelease(pSourceSD);
SafeRelease(pSourceNode);
}
}
}
/// <summary>
/// Starts, seeks, or restarts the media source by specifying where to start playback.
/// </summary>
/// <param name="mediaSource">A valid IMFMediaSource instance.</param>
/// <param name="presentationDescriptor">An IMFPresentationDescriptor instance of the media source's presentation descriptor.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
/// <remarks>This method starts the media source at its beginning.</remarks>
public static HResult Start(this IMFMediaSource mediaSource, IMFPresentationDescriptor presentationDescriptor)
{
if (mediaSource == null)
{
throw new ArgumentNullException("mediaSource");
}
using (PropVariant start = new PropVariant(0))
{
return(mediaSource.Start(presentationDescriptor, Guid.Empty, start));
}
}
public static void MFCreateTranscodeTopology(
IMFMediaSource mediaSource,
string outputFilePath,
IMFTranscodeProfile transcodeProfile,
out IMFTopology transcodeTopology)
{
int result = ExternMFCreateTranscodeTopology(mediaSource, outputFilePath, transcodeProfile, out transcodeTopology);
if (result < 0)
{
throw new COMException("Exception from HRESULT: 0x" + result.ToString("X", System.Globalization.NumberFormatInfo.InvariantInfo) + " (MFCreateTranscodeTopology failed)", result);
}
}
private static HResult ProcessMediaSession(string VideoFile)
{
HResult hr = S_OK;
IMFMediaSource source = null;
IMFTopology topology = null;
IMFMediaSinkAlt mediaSink = null;
IMFMediaSession mediaSession = null;
hr = CreateMediaSource(VideoFile, out source);
if (Failed(hr))
{
return(hr);
}
hr = CreateTopology(out topology, out mediaSink, source);
if (Failed(hr))
{
topology = null;
mediaSink = null;
source = null;
return(hr);
}
hr = MF.CreateMediaSession(null, out mediaSession);
if (Failed(hr))
{
topology = null;
mediaSink = null;
source = null;
mediaSession = null;
return(hr);
}
hr = mediaSession.SetTopology(MFSessionSetTopologyFlags.None, topology);
if (Failed(hr))
{
topology = null;
mediaSink = null;
source = null;
mediaSession = null;
return(hr);
}
hr = RunMediaSession(mediaSession);
return(hr);
}
/// <summary>
/// Resets the local graph resources to their
/// default settings
/// </summary>
private void ResetGraphResources()
{
//m_graph = null;
if (m_pSource != null)
{
Marshal.ReleaseComObject(m_pSource);
}
m_pSource = null;
if (m_pSession != null)
{
Marshal.ReleaseComObject(m_pSession);
}
m_pSession = null;
}
public MFMediaUriPlayer(IntPtr hVideo, IntPtr hEvent)
{
Debug.Assert(hVideo != IntPtr.Zero);
Debug.Assert(hEvent != IntPtr.Zero);
m_pSession = null;
m_pSource = null;
m_pVideoDisplay = null;
m_hwndVideo = hVideo;
m_hwndEvent = hEvent;
m_state = PlayerState.Ready;
m_hCloseEvent = new AutoResetEvent(false);
MFExtern.MFStartup(0x10070, MFStartup.Full);
}
/// <summary>
/// Init
/// </summary>
/// <param name="hVideo"></param>
/// <param name="hEvent"></param>
public Media(IntPtr hVideo, IntPtr hEvent)
{
TRACE("Media::Media");
Debug.Assert(hVideo != IntPtr.Zero);
Debug.Assert(hEvent != IntPtr.Zero);
m_pSession = null;
m_pSource = null;
m_pVideoDisplay = null;
m_hwndVideo = hVideo;
m_hwndEvent = hEvent;
m_state = MediaState.Ready;
m_hCloseEvent = new AutoResetEvent(false);
MFExtern.MFStartup(MF_VERSION, MFStartup.Full);
}
private HResult GetMediaSource(string webcamId, out IMFMediaSource source)
{
MFExtern.MFCreateAttributes(out IMFAttributes attributes, 2);
attributes.SetGUID(MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
attributes.SetString(MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_SYMBOLIC_LINK, webcamId);
HResult result = MFExtern.MFCreateDeviceSource(attributes, out source);
if ((uint)result == 0xC00D36E6)
{
result = HResult.ERROR_DEVICE_NOT_CONNECTED;
}
Marshal.ReleaseComObject(attributes);
return(result);
}
///////////////////////////////////////////////////////////////////////
// Name: CreateWavFile
// Description: Creates a .wav file from an input file.
///////////////////////////////////////////////////////////////////////
static void CreateWavFile(string sURL, string sOutputFile)
{
IMFByteStream pStream = null;
IMFMediaSinkAlt pSink = null;
IMFMediaSource pSource = null;
IMFTopology pTopology = null;
WavSinkNS.CWavSink pObj = null;
HResult hr = MFExtern.MFCreateFile(MFFileAccessMode.Write, MFFileOpenMode.DeleteIfExist, MFFileFlags.None, sOutputFile, out pStream);
MFError.ThrowExceptionForHR(hr);
try
{
pObj = new WavSinkNS.CWavSink(pStream);
pSink = pObj as IMFMediaSinkAlt;
// Create the media source from the URL.
CreateMediaSource(sURL, out pSource);
// Create the topology.
CreateTopology(pSource, pSink, out pTopology);
// Run the media session.
RunMediaSession(pTopology);
hr = pSource.Shutdown();
MFError.ThrowExceptionForHR(hr);
}
finally
{
if (pStream != null)
{
Marshal.ReleaseComObject(pStream);
}
if (pSource != null)
{
Marshal.ReleaseComObject(pSource);
}
if (pTopology != null)
{
Marshal.ReleaseComObject(pTopology);
}
//pObj.Dispose();
}
}
public MediaFoundationCapturer(IMFActivate devsource)
{
MediaFoundationApi.Startup();
WaveFormat format = new WaveFormat();
try
{
devsource.ActivateObject(typeof(IMFMediaSource).GUID, out object _source);
source = _source as IMFMediaSource;
}
catch (COMException)
{
throw new ArgumentException("Can't create media source with the devsource.");
}
SetFormat(format);
recordthread = new Thread(DoRecord);
}
///////////////////////////////////////////////////////////////////////
// Name: CreateTopologyBranch
// Description: Adds a source and sink to the topology and
// connects them.
//
// pTopology: The topology.
// pSource: The media source.
// pPD: The source's presentation descriptor.
// pSD: The stream descriptor for the stream.
// pSink: The media sink.
//
///////////////////////////////////////////////////////////////////////
static void CreateTopologyBranch(
IMFTopology pTopology,
IMFMediaSource pSource, // Media source.
IMFPresentationDescriptor pPD, // Presentation descriptor.
IMFStreamDescriptor pSD, // Stream descriptor.
IMFMediaSinkAlt pSink
)
{
HResult hr;
IMFTopologyNode pSourceNode = null;
IMFTopologyNode pOutputNode = null;
CreateSourceNode(pSource, pPD, pSD, out pSourceNode);
try
{
CreateOutputNode(pSink, 0, out pOutputNode);
try
{
hr = pTopology.AddNode(pSourceNode);
MFError.ThrowExceptionForHR(hr);
hr = pTopology.AddNode(pOutputNode);
MFError.ThrowExceptionForHR(hr);
hr = pSourceNode.ConnectOutput(0, pOutputNode, 0);
MFError.ThrowExceptionForHR(hr);
}
finally
{
if (pOutputNode != null)
{
Marshal.ReleaseComObject(pOutputNode);
}
}
}
finally
{
if (pSourceNode != null)
{
Marshal.ReleaseComObject(pSourceNode);
}
}
}
public HResult GetMediaSource(out IMFMediaSource ppMediaSource)
{
HResult hr = HResult.S_OK;
ppMediaSource = null;
lock (_spSource)
{
hr = CheckShutdown();
if (MFError.Succeeded(hr))
{
ppMediaSource = _spSource;
}
return(hr);
}
}
static void ConvertFile(string sourceFileName, string destFileName)
{
Console.WriteLine($"------------------------------------------------------------");
Console.WriteLine($" Source: {sourceFileName}");
IMFMediaSource mediaSource = GetMediaSource(sourceFileName);
int bitRate = GetBitRate(mediaSource);
IMFMetadata metadata = GetMetadata(mediaSource);
ID3TagData tagData = new ID3TagData()
{
Title = GetStringProperty(metadata, "Title"),
Artist = GetStringProperty(metadata, "Author"),
Album = GetStringProperty(metadata, "WM/AlbumTitle"),
Year = GetStringProperty(metadata, "WM/Year"),
Genre = GetStringProperty(metadata, "WM/Genre"),
Track = GetUIntProperty(metadata, "WM/TrackNumber"),
AlbumArtist = GetStringProperty(metadata, "WM/AlbumArtist")
};
COMBase.SafeRelease(metadata);
metadata = null;
COMBase.SafeRelease(mediaSource);
mediaSource = null;
Console.WriteLine($" Title: {tagData.Title}");
Console.WriteLine($"Album artist: {tagData.AlbumArtist}");
Console.WriteLine($" Artist: {tagData.Artist}");
Console.WriteLine($" Album: {tagData.Album}");
Console.WriteLine($" Year: {tagData.Year}");
Console.WriteLine($" Genre: {tagData.Genre}");
Console.WriteLine($" Track: {tagData.Track}");
Console.WriteLine($" Bit rate: {bitRate}");
using (AudioFileReader reader = new AudioFileReader(sourceFileName))
{
using (LameMP3FileWriter writer = new LameMP3FileWriter(destFileName, reader.WaveFormat, bitRate, tagData))
{
reader.CopyTo(writer);
}
}
Console.WriteLine($" Destination: {destFileName}");
}
protected void CloseSession()
{
int hr;
/*if (m_pVideoDisplay != null)
* {
* Marshal.ReleaseComObject(m_pVideoDisplay);
* m_pVideoDisplay = null;
* }
*/
if (m_pSession != null)
{
hr = m_pSession.Close();
MFError.ThrowExceptionForHR(hr);
// Wait for the close operation to complete
/*bool res = m_hCloseEvent.WaitOne(5000, true);
* if (!res)
* {
* TRACE(("WaitForSingleObject timed out!"));
* }*/
}
// Complete shutdown operations
// 1. Shut down the media source
if (m_pSource != null)
{
hr = m_pSource.Shutdown();
MFError.ThrowExceptionForHR(hr);
COMBase.SafeRelease(m_pSource);
m_pSource = null;
}
// 2. Shut down the media session. (Synchronous operation, no events.)
if (m_pSession != null)
{
hr = m_pSession.Shutdown();
Marshal.ReleaseComObject(m_pSession);
m_pSession = null;
}
}
public CPlayer(IntPtr hVideo, IntPtr hEvent)
{
TRACE(("CPlayer::CPlayer"));
Debug.Assert(hVideo != IntPtr.Zero);
Debug.Assert(hEvent != IntPtr.Zero);
m_pSession = null;
m_pSource = null;
m_pVideoDisplay = null;
m_hwndVideo = hVideo;
m_hwndEvent = hEvent;
m_state = PlayerState.Ready;
m_hCloseEvent = new AutoResetEvent(false);
int hr = MFExtern.MFStartup(0x10070, MFStartup.Full);
MFError.ThrowExceptionForHR(hr);
}
static IMFMediaSource GetMediaSource(string sourceFileName)
{
HResult hr;
// Get an IMFMediaSource.
IMFSourceResolver sourceResolver;
hr = MFExtern.MFCreateSourceResolver(out sourceResolver);
MFError.ThrowExceptionForHR(hr);
MFObjectType objectType = MFObjectType.Invalid;
object source;
hr = sourceResolver.CreateObjectFromURL(sourceFileName, MFResolution.MediaSource, null, out objectType, out source);
MFError.ThrowExceptionForHR(hr);
IMFMediaSource mediaSource = (IMFMediaSource)source;
COMBase.SafeRelease(sourceResolver);
sourceResolver = null;
return(mediaSource);
}
private IMFSourceReader CreateSourceReader(IMFMediaSource mfs)
{
IMFSourceReader reader = null;
try
{
MFExtern.MFCreateAttributes(out sourcevideoreaderattribute, 2);
sourcevideoreaderattribute.SetGUID(MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, CLSID.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
sourcevideoreaderattribute.SetUINT32(MFAttributesClsid.MF_SOURCE_READER_ENABLE_VIDEO_PROCESSING, 1);
MFExtern.MFCreateSourceReaderFromMediaSource(mfs, sourcevideoreaderattribute, out reader);
//reader.GetCurrentMediaType((int)__MIDL___MIDL_itf_mfreadwrite_0000_0001_0001.MF_SOURCE_READER_FIRST_VIDEO_STREAM, out sourcemeidatype);
}
catch (Exception e)
{
Debug.WriteLine("ERROR CreateSourceReader", e.StackTrace);
}
return(reader);
}
public static void MFCreateSourceReaderFromMediaSource(
IMFMediaSource mediaSource,
IMFAttributes attributes,
out IMFSourceReader sourceReader)
{
int result = ExternMFCreateSourceReaderFromMediaSource(mediaSource, attributes, out sourceReader);
if (result < 0)
{
throw new COMException("Exception from HRESULT: 0x" + result.ToString("X", System.Globalization.NumberFormatInfo.InvariantInfo) + " (MFCreateTranscodeTopology failed)", result);
}
}
public static void MFCreateTranscodeTopology(
IMFMediaSource mediaSource,
string outputFilePath,
IMFTranscodeProfile transcodeProfile,
out IMFTopology transcodeTopology)
{
int result = ExternMFCreateTranscodeTopology(mediaSource, outputFilePath, transcodeProfile, out transcodeTopology);
if (result < 0)
{
throw new COMException("Exception from HRESULT: 0x" + result.ToString("X", System.Globalization.NumberFormatInfo.InvariantInfo) + " (MFCreateTranscodeTopology failed)", result);
}
}
///////////////////////////////////////////////////////////////////////
// Name: AddBranchToPartialTopology
// Description: Adds a topology branch for one stream.
//
// pTopology: Pointer to the topology object.
// hVideoWindow: Handle to the video window (for video streams).
// pSource: Media source.
// pSourcePD: The source's presentation descriptor.
// iStream: Index of the stream to render.
//
// Pre-conditions: The topology must be created already.
//
// Notes: For each stream, we must do the following:
// 1. Create a source node associated with the stream.
// 2. Create an output node for the renderer.
// 3. Connect the two nodes.
//
// Optionally we can also add an effect transform between the source
// and output nodes.
//
// The media session will resolve the topology, so we do not have
// to worry about decoders or color converters.
/////////////////////////////////////////////////////////////////////////
void AddBranchToPartialTopology(
IMFTopology pTopology,
IntPtr hVideoWindow,
IMFMediaSource pSource,
IMFPresentationDescriptor pSourcePD,
int iStream)
{
TRACE("Player::RenderStream");
IMFStreamDescriptor pSourceSD = null;
IMFTopologyNode pSourceNode = null;
int hr;
Guid majorType;
bool fSelected = false;
// Get the stream descriptor for this stream.
hr = pSourcePD.GetStreamDescriptorByIndex(iStream, out fSelected, out pSourceSD);
MFError.ThrowExceptionForHR(hr);
// First check if the stream is selected by default. If not, ignore it.
// More sophisticated applications can change the default selections.
if (fSelected)
{
try
{
// Create a source node for this stream.
CreateSourceStreamNode(pSource, pSourcePD, pSourceSD, out pSourceNode);
// Add the source node to the topology.
hr = pTopology.AddNode(pSourceNode);
MFError.ThrowExceptionForHR(hr);
// Get the major media type for the stream.
GetStreamType(pSourceSD, out majorType);
if (majorType == MFMediaType.Video)
{
// For video, use the grayscale transform.
CreateVideoBranch(pTopology, pSourceNode, hVideoWindow, m_VideoEffect);
}
else if (majorType == MFMediaType.Audio)
{
CreateAudioBranch(pTopology, pSourceNode, Guid.Empty);
}
}
finally
{
// Clean up.
SafeRelease(pSourceSD);
SafeRelease(pSourceNode);
}
}
}
///////////////////////////////////////////////////////////////////////
// Name: CreateSourceStreamNode
// Description: Creates a source-stream node for a stream.
//
// pSource: Media source.
// pSourcePD: Presentation descriptor for the media source.
// pSourceSD: Stream descriptor for the stream.
// ppNode: Receives a pointer to the new node.
//
// Pre-conditions: Create the media source.
/////////////////////////////////////////////////////////////////////////
void CreateSourceStreamNode(
IMFMediaSource pSource,
IMFPresentationDescriptor pSourcePD,
IMFStreamDescriptor pSourceSD,
out IMFTopologyNode ppNode
)
{
int hr;
// Create the source-stream node.
hr = MFExtern.MFCreateTopologyNode(MFTopologyType.SourcestreamNode, out ppNode);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the media source.
hr = ppNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_SOURCE, pSource);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the presentation descriptor.
hr = ppNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_PRESENTATION_DESCRIPTOR, pSourcePD);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the stream descriptor.
hr = ppNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_STREAM_DESCRIPTOR, pSourceSD);
MFError.ThrowExceptionForHR(hr);
}
protected void CreateMediaSource(string sURL)
{
TRACE("CPlayer::CreateMediaSource");
IMFSourceResolver pSourceResolver;
object pSource;
// Create the source resolver.
MFExtern.MFCreateSourceResolver(out pSourceResolver);
try
{
// Use the source resolver to create the media source.
MFObjectType ObjectType = MFObjectType.Invalid;
pSourceResolver.CreateObjectFromURL(
sURL, // URL of the source.
MFResolution.MediaSource, // Create a source object.
null, // Optional property store.
out ObjectType, // Receives the created object type.
out pSource // Receives a pointer to the media source.
);
// Get the IMFMediaSource interface from the media source.
m_pSource = (IMFMediaSource)pSource;
}
finally
{
// Clean up
Marshal.ReleaseComObject(pSourceResolver);
}
}
///////////////////////////////////////////////////////////////////////
// Name: CreateTopology
// Description: Creates the topology.
//
// Note: The first audio stream is conntected to the media sink.
// Other streams are deselected.
///////////////////////////////////////////////////////////////////////
static void CreateTopology(IMFMediaSource pSource, IMFMediaSinkAlt pSink, out IMFTopology ppTopology)
{
int hr;
IMFPresentationDescriptor pPD = null;
IMFStreamDescriptor pSD = null;
int cStreams = 0;
bool fConnected = false;
hr = MFExtern.MFCreateTopology(out ppTopology);
MFError.ThrowExceptionForHR(hr);
hr = pSource.CreatePresentationDescriptor(out pPD);
MFError.ThrowExceptionForHR(hr);
try
{
hr = pPD.GetStreamDescriptorCount(out cStreams);
MFError.ThrowExceptionForHR(hr);
Guid majorType;
bool fSelected = false;
for (int iStream = 0; iStream < cStreams; iStream++)
{
hr = pPD.GetStreamDescriptorByIndex(iStream, out fSelected, out pSD);
MFError.ThrowExceptionForHR(hr);
try
{
// If the stream is not selected by default, ignore it.
if (!fSelected)
{
continue;
}
// Get the major media type.
GetStreamMajorType(pSD, out majorType);
// If it's not audio, deselect it and continue.
if (majorType != MFMediaType.Audio)
{
// Deselect this stream
hr = pPD.DeselectStream(iStream);
MFError.ThrowExceptionForHR(hr);
continue;
}
// It's an audio stream, so try to create the topology branch.
CreateTopologyBranch(ppTopology, pSource, pPD, pSD, pSink);
}
finally
{
if (pSD != null)
{
Marshal.ReleaseComObject(pSD);
}
}
// Set our status flag.
fConnected = true;
// At this point we have reached the first audio stream in the
// source, so we can stop looking (whether we succeeded or failed).
break;
}
}
finally
{
if (pPD != null)
{
Marshal.ReleaseComObject(pPD);
}
}
// Even if we succeeded, if we didn't connect any streams, it's a failure.
// (For example, it might be a video-only source.
if (!fConnected)
{
throw new Exception("No audio streams");
}
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::CreateMediaSource (Private)
// Description:
// Creates a media source from URL
// Parameter:
// sURL: [in] File URL
// ppMediaSource: [out] Receives the media source
/////////////////////////////////////////////////////////////////////////////////////////
private void CreateMediaSource(
string sURL,
out IMFMediaSource ppMediaSource)
{
Debug.WriteLine("CPlayer::CreateMediaSource");
if (sURL == null)
{
throw new COMException("null pointer", E_Pointer);
}
int hr;
IMFSourceResolver pSourceResolver;
object pSourceUnk;
hr = MFExtern.MFCreateSourceResolver(out pSourceResolver);
MFError.ThrowExceptionForHR(hr);
try
{
// Use the source resolver to create the media source.
MFObjectType ObjectType = MFObjectType.Invalid;
hr = pSourceResolver.CreateObjectFromURL(
sURL, // URL of the source.
MFResolution.MediaSource, // Create a source object.
null, // Optional property store.
out ObjectType, // Receives the created object type.
out pSourceUnk // Receives a pointer to the media source.
);
MFError.ThrowExceptionForHR(hr);
// Get the IMFMediaSource interface from the media source.
ppMediaSource = (IMFMediaSource)pSourceUnk;
}
finally
{
SafeRelease(pSourceResolver);
}
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::AddTopologyToSequencer (Private)
// Description:
// Adds the topology to the sequencer
// Parameter:
// sURL: [in] File URL
// pMediaSource: [in] Pointer to the media source
// pTopology: [in] Pointer to the topology
// pSegmentId: [out] Receives the segment id returned by the sequencer source
/////////////////////////////////////////////////////////////////////////////////////////
private void AddTopologyToSequencer(
string sURL,
IMFMediaSource pMediaSource,
IMFTopology pTopology,
out int pSegmentId)
{
Debug.WriteLine("CPlayer::AddTopologyToSequencer");
if (sURL == null || pMediaSource == null || pTopology == null)
{
throw new COMException("null pointer", E_Pointer);
}
long hnsSegmentDuration = 0;
long TopologyID = 0;
int hr;
IMFPresentationDescriptor pPresentationDescriptor;
hr = m_pSequencerSource.AppendTopology(pTopology, 0, out pSegmentId);
MFError.ThrowExceptionForHR(hr);
hr = pTopology.GetTopologyID(out TopologyID);
MFError.ThrowExceptionForHR(hr);
//create a presentation descriptor
hr = pMediaSource.CreatePresentationDescriptor(out pPresentationDescriptor);
MFError.ThrowExceptionForHR(hr);
//get the segment duration
hr = pPresentationDescriptor.GetUINT64(MFAttributesClsid.MF_PD_DURATION, out hnsSegmentDuration);
MFError.ThrowExceptionForHR(hr);
Debug.Assert(hnsSegmentDuration > 0);
//store the segment info: SegmentId, SegmentDuration, TopoID in the linked list.
m_Segments.AddNewSegmentEntry(pSegmentId, hnsSegmentDuration, TopologyID, sURL);
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::CreateTopology (Private)
// Description:
// Creates a topology for the media source
// Parameter:
// pMediaSource: [in] Pointer to the media source
// pTopology: [in] Receives the partial topology
/////////////////////////////////////////////////////////////////////////////////////////
private void CreateTopology(
IMFMediaSource pMediaSource,
IMFTopology pTopology)
{
Debug.WriteLine("CPlayer::CreateTopology");
//The caller needs to pass a valid media source
//We need the media source because to set the source node attribute, media source is needed
if (pMediaSource == null || pTopology == null)
{
throw new COMException("null pointer", E_Pointer);
}
IMFPresentationDescriptor pPresentationDescriptor;
//Create Presentation Descriptor for the media source
int hr = pMediaSource.CreatePresentationDescriptor(out pPresentationDescriptor);
MFError.ThrowExceptionForHR(hr);
try
{
CreateNodesForStream(pPresentationDescriptor, pMediaSource, pTopology);
}
finally
{
SafeRelease(pPresentationDescriptor);
}
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::CreateSourceNode (Private)
// Description:
// Creates the source node for a stream
// Parameter:
// pPresentationDescriptor: [in] Pointer to the presentation descriptor for the media source
// pStreamDescriptor: [in] Stream descriptor for the stream
// pMediaSource: [in] Pointer to the media source
// ppSourceNode: [out] Receives a pointer to the new node
///////////////////////////////////////////////////////////////////////////////////////////
private void CreateSourceNode(
IMFPresentationDescriptor pPresentationDescriptor,
IMFStreamDescriptor pStreamDescriptor,
IMFMediaSource pMediaSource,
out IMFTopologyNode ppSourceNode)
{
if (pPresentationDescriptor == null || pMediaSource == null || pStreamDescriptor == null)
{
throw new COMException("null pointer", E_Pointer);
}
int hr;
// Create the source-stream node.
hr = MFExtern.MFCreateTopologyNode(MFTopologyType.SourcestreamNode, out ppSourceNode);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the media source. Necessary.
hr = ppSourceNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_SOURCE, pMediaSource);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the presentation descriptor. Necessary.
hr = ppSourceNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_PRESENTATION_DESCRIPTOR, pPresentationDescriptor);
MFError.ThrowExceptionForHR(hr);
// Set attribute: Pointer to the stream descriptor. Necessary.
hr = ppSourceNode.SetUnknown(MFAttributesClsid.MF_TOPONODE_STREAM_DESCRIPTOR, pStreamDescriptor);
MFError.ThrowExceptionForHR(hr);
}
protected void CloseSession()
{
if (m_pVideoDisplay != null)
{
Marshal.ReleaseComObject(m_pVideoDisplay);
m_pVideoDisplay = null;
}
if (m_pSession != null)
{
m_pSession.Close();
// Wait for the close operation to complete
bool res = m_hCloseEvent.WaitOne(5000, true);
if (!res)
{
TRACE(("WaitForSingleObject timed out!"));
}
}
// Complete shutdown operations
// 1. Shut down the media source
if (m_pSource != null)
{
m_pSource.Shutdown();
SafeRelease(m_pSource);
m_pSource = null;
}
// 2. Shut down the media session. (Synchronous operation, no events.)
if (m_pSession != null)
{
m_pSession.Shutdown();
Marshal.ReleaseComObject(m_pSession);
m_pSession = null;
}
}
private int OpenMediaSource(IMFMediaSource pSource)
{
int hr = S_Ok;
IMFAttributes pAttributes = null;
hr = MFExtern.MFCreateAttributes(out pAttributes, 2);
if (Succeeded(hr))
{
hr = pAttributes.SetUnknown(MFAttributesClsid.MF_SOURCE_READER_ASYNC_CALLBACK, this);
}
if (Succeeded(hr))
{
IMFSourceReader pReader;
hr = MFExtern.MFCreateSourceReaderFromMediaSource(
pSource,
pAttributes,
out pReader
);
m_pReader = (IMFSourceReaderAsync)pReader;
}
SafeRelease(pAttributes);
return hr;
}
private int OpenMediaSource(IMFMediaSource pSource, ref IMFSourceReaderAsync pReaderAsync)
{
// Create an attribute store to hold initialization settings.
IMFAttributes pAttributes;
var hr = MFExtern.MFCreateAttributes(out pAttributes, 2);
//if (Succeeded(hr))
//{
// hr = pAttributes.SetUINT32(MFAttributesClsid.MF_READWRITE_DISABLE_CONVERTERS, 1);
//}
if (Succeeded(hr))
{
hr = pAttributes.SetUnknown(MFAttributesClsid.MF_SOURCE_READER_ASYNC_CALLBACK, this);
}
if (Succeeded(hr))
{
IMFSourceReader pReader;
hr = MFExtern.MFCreateSourceReaderFromMediaSource(pSource, pAttributes, out pReader);
// ReSharper disable once SuspiciousTypeConversion.Global
pReaderAsync = (IMFSourceReaderAsync)pReader;
}
SafeRelease(pAttributes);
return hr;
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::CreateNodesForStream (Private)
// Description:
// Creates the source and output nodes for a stream and
// Adds them to the topology
// Connects the source node to the output node
//
// Parameter:
// pPresentationDescriptor: [in] Pointer to the presentation descriptor for the media source
// pMediaSource: [in] Pointer to the media source
// pTopology: [in] Pointer to the topology
//
// Notes: For each stream, the app must:
// 1. Create a source node associated with the stream.
// 2. Create an output node for the renderer.
// 3. Connect the two nodes.
// The media session will resolve the topology, transform nodes are not required
/////////////////////////////////////////////////////////////////////////////////////////
private void CreateNodesForStream(
IMFPresentationDescriptor pPresentationDescriptor,
IMFMediaSource pMediaSource,
IMFTopology pTopology)
{
if (pPresentationDescriptor == null || pMediaSource == null || pTopology == null)
{
throw new COMException("null pointer", E_Pointer);
}
int hr;
IMFStreamDescriptor pStreamDescriptor;
IMFTopologyNode pSourceNode;
IMFTopologyNode pOutputNode;
bool fSelected = false;
// Get the stream descriptor for the only stream index =0.
hr = pPresentationDescriptor.GetStreamDescriptorByIndex(0, out fSelected, out pStreamDescriptor);
MFError.ThrowExceptionForHR(hr);
try
{
if (fSelected)
{
// Create a source node for this stream and add it to the topology.
CreateSourceNode(pPresentationDescriptor, pStreamDescriptor, pMediaSource, out pSourceNode);
try
{
hr = pTopology.AddNode(pSourceNode);
MFError.ThrowExceptionForHR(hr);
// Create the output node for the renderer and add it to the topology.
CreateOutputNode(pStreamDescriptor, out pOutputNode);
try
{
hr = pTopology.AddNode(pOutputNode);
MFError.ThrowExceptionForHR(hr);
// Connect the source node to the output node.
hr = pSourceNode.ConnectOutput(0, pOutputNode, 0);
MFError.ThrowExceptionForHR(hr);
}
finally
{
SafeRelease(pOutputNode);
}
}
finally
{
SafeRelease(pSourceNode);
}
}
}
finally
{
//clean up
SafeRelease(pStreamDescriptor);
}
}
///////////////////////////////////////////////////////////////////////
// Name: CreateTopologyBranch
// Description: Adds a source and sink to the topology and
// connects them.
//
// pTopology: The topology.
// pSource: The media source.
// pPD: The source's presentation descriptor.
// pSD: The stream descriptor for the stream.
// pSink: The media sink.
//
///////////////////////////////////////////////////////////////////////
static void CreateTopologyBranch(
IMFTopology pTopology,
IMFMediaSource pSource, // Media source.
IMFPresentationDescriptor pPD, // Presentation descriptor.
IMFStreamDescriptor pSD, // Stream descriptor.
IMFMediaSinkAlt pSink
)
{
int hr;
IMFTopologyNode pSourceNode = null;
IMFTopologyNode pOutputNode = null;
CreateSourceNode(pSource, pPD, pSD, out pSourceNode);
try
{
CreateOutputNode(pSink, 0, out pOutputNode);
try
{
hr = pTopology.AddNode(pSourceNode);
MFError.ThrowExceptionForHR(hr);
hr = pTopology.AddNode(pOutputNode);
MFError.ThrowExceptionForHR(hr);
hr = pSourceNode.ConnectOutput(0, pOutputNode, 0);
MFError.ThrowExceptionForHR(hr);
}
finally
{
if (pOutputNode != null)
{
Marshal.ReleaseComObject(pOutputNode);
}
}
}
finally
{
if (pSourceNode != null)
{
Marshal.ReleaseComObject(pSourceNode);
}
}
}
/// <summary>
/// Init
/// </summary>
/// <param name="hVideo"></param>
/// <param name="hEvent"></param>
public Media(IntPtr hVideo, IntPtr hEvent)
{
TRACE("Media::Media");
Debug.Assert(hVideo != IntPtr.Zero);
Debug.Assert(hEvent != IntPtr.Zero);
m_pSession = null;
m_pSource = null;
m_pVideoDisplay = null;
m_hwndVideo = hVideo;
m_hwndEvent = hEvent;
m_state = MediaState.Ready;
m_hCloseEvent = new AutoResetEvent(false);
MFExtern.MFStartup(MF_VERSION, MFStartup.Full);
}
public int GetMediaSource(out IMFMediaSource ppMediaSource)
{
// Make sure we *never* leave this entry point with an exception
try
{
m_Log.WriteLine("-GetMediaSource");
ppMediaSource = null;
lock (this)
{
if (m_pSource == null)
{
throw new COMException("null WavSource", E_Unexpected);
}
CheckShutdown();
ppMediaSource = (IMFMediaSource)m_pSource;
}
return S_Ok;
}
catch (Exception e)
{
ppMediaSource = null;
return Marshal.GetHRForException(e);
}
}
//////////////////////////////////////////////////////////////////////
// Name: CreateSourceNode
// Creates a source node for a media stream.
//
// pSource: Pointer to the media source.
// pSourcePD: Pointer to the source's presentation descriptor.
// pSourceSD: Pointer to the stream descriptor.
// ppNode: Receives the IMFTopologyNode pointer.
///////////////////////////////////////////////////////////////////////
static void CreateSourceNode(
IMFMediaSource pSource, // Media source.
IMFPresentationDescriptor pPD, // Presentation descriptor.
IMFStreamDescriptor pSD, // Stream descriptor.
out IMFTopologyNode ppNode // Receives the node pointer.
)
{
int hr;
// Create the node.
hr = MFExtern.MFCreateTopologyNode(
MFTopologyType.SourcestreamNode,
out ppNode);
MFError.ThrowExceptionForHR(hr);
// Set the attributes.
hr = ppNode.SetUnknown(
MFAttributesClsid.MF_TOPONODE_SOURCE,
pSource);
MFError.ThrowExceptionForHR(hr);
hr = ppNode.SetUnknown(
MFAttributesClsid.MF_TOPONODE_PRESENTATION_DESCRIPTOR,
pPD);
MFError.ThrowExceptionForHR(hr);
hr = ppNode.SetUnknown(
MFAttributesClsid.MF_TOPONODE_STREAM_DESCRIPTOR,
pSD);
MFError.ThrowExceptionForHR(hr);
}
