private void createSession(string sFilePath)
{
try
{
MFError throwonhr = null;
if (m_pSession == null)
{
throwonhr = MFExtern.MFCreateMediaSession(null, out m_pSession);
}
else
{
Stop();
}
// Create the media source.
CreateMediaSource(sFilePath);
if (m_pSource == null)
{
return;
}
IMFPresentationDescriptor lPresentationDescriptor = null;
m_pSource.CreatePresentationDescriptor(out lPresentationDescriptor);
if (lPresentationDescriptor == null)
{
return;
}
lPresentationDescriptor.GetUINT64(MFAttributesClsid.MF_PD_DURATION, out mMediaDuration);
IMFTopology pTopology = null;
// Create a partial topology.
CreateTopologyFromSource(out pTopology);
HResult hr = HResult.S_OK;
// Set the topology on the media session.
hr = m_pSession.SetTopology(MFSessionSetTopologyFlags.Immediate, pTopology);
StartPlayback();
}
catch (Exception)
{
}
}
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);
}
////////////////////////////////////////////////////////////////////////////////////////
// Name: CPlayer::QueueNextSegment (Private)
// Description:
// Queues the next topology on the session.
//
// Parameter:
// pPresentationDescriptor: [in] Presentation descriptor for the next topology
// pSegmentId: [out] Receives the corresponding segment identifier for the topology
//
// Note: The presentation descriptor is received from the MENewPresentation event.
// This event tells the session about the next topology in the sequencer.
// If NULL is passed, this method queues the first topology on the media session.
/////////////////////////////////////////////////////////////////////////////////////////
private void QueueNextSegment(
IMFPresentationDescriptor pPresentationDescriptor,
out int pSegmentId)
{
HResult hr;
IMFMediaSourceTopologyProvider pMediaSourceTopologyProvider;
IMFTopology pTopology;
int SegId = 0;
// Get the Segment ID.
hr = m_pSequencerSource.GetPresentationContext(
pPresentationDescriptor,
out SegId,
out pTopology);
MFError.ThrowExceptionForHR(hr);
SafeRelease(pTopology);
Debug.WriteLine(string.Format("CPlayer::QueueNextSegment: {0}", SegId));
//Get the topology for the presentation descriptor
pMediaSourceTopologyProvider = (IMFMediaSourceTopologyProvider)m_pSequencerSource;
hr = pMediaSourceTopologyProvider.GetMediaSourceTopology(
pPresentationDescriptor,
out pTopology);
MFError.ThrowExceptionForHR(hr);
try
{
//Set the topology on the media session
hr = m_pMediaSession.SetTopology(MFSessionSetTopologyFlags.None, pTopology);
MFError.ThrowExceptionForHR(hr);
pSegmentId = SegId;
}
finally
{
//clean up
SafeRelease(pTopology);
}
}
/// <summary>
/// Open from a Url address
/// </summary>
/// <param name="sURL"></param>
/// <returns></returns>
public int OpenURL(string sURL)
{
TRACE("Media::OpenURL");
TRACE("URL = " + sURL);
// 1. Create a new media session
// 2. Create the media source
// 3. Create the topology
// 4. Queue the topology [asynchronous]
// 5. Start playback [asynchronous - does not happen in this method]
int hr = S_Ok;
try
{
IMFTopology pTopology = null;
// Create the media session.
CreateSession();
// Create the media source.
CreateMediaSource(sURL);
// Create a partial topology.
CreateTopologyFromSource(out pTopology);
// Set the topology on the media session.
m_pSession.SetTopology(0, pTopology);
// Set our state to "open pending"
m_state = MediaState.OpenPending;
NotifyState();
SafeRelease(pTopology);
// If SetTopology succeeded, the media session will queue an
// MESessionTopologySet event.
}
catch (Exception e)
{
hr = Marshal.GetHRForException(e);
NotifyError(hr);
m_state = MediaState.Ready;
}
return(hr);
}
private void SetFirstTopology(IMFSequencerSource pSequencerSource, IMFMediaSession pMediaSession)
{
IMFMediaSource pMediaSource;
IMFPresentationDescriptor pPresentationDescriptor;
IMFMediaSourceTopologyProvider pMediaSourceTopologyProvider;
IMFTopology pTopology;
pMediaSource = pSequencerSource as IMFMediaSource;
// Create the presentation descriptor for the media source.
int hr = pMediaSource.CreatePresentationDescriptor(out pPresentationDescriptor);
MFError.ThrowExceptionForHR(hr);
// Get the topology provider from the sequencer source.
pMediaSourceTopologyProvider = pSequencerSource as IMFMediaSourceTopologyProvider;
// Get the first topology from the topology provider.
hr = pMediaSourceTopologyProvider.GetMediaSourceTopology(pPresentationDescriptor, out pTopology);
MFError.ThrowExceptionForHR(hr);
// Set the topology on the media session.
hr = pMediaSession.SetTopology(0, pTopology);
MFError.ThrowExceptionForHR(hr);
}
/// <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>
/// Opens prepares the media session and topology and opens the media source
/// and media sink.
///
/// Once the session and topology are setup, a MESessionTopologySet event
/// will be triggered in the callback handler. After that the events there
/// trigger other events and everything rolls along automatically.
/// </summary>
/// <param name="sourceFileName">the source file name</param>
/// <param name="outputFileName">the name of the output file</param>
/// <history>
/// 01 Nov 18 Cynic - Originally Written
/// </history>
public void PrepareSessionAndTopology(string sourceFileName, string outputFileName)
{
HResult hr;
IMFSourceResolver pSourceResolver = null;
IMFTopology pTopology = null;
IMFPresentationDescriptor sourcePresentationDescriptor = null;
int sourceStreamCount = 0;
IMFStreamDescriptor audioStreamDescriptor = null;
bool streamIsSelected = false;
IMFTopologyNode sourceAudioNode = null;
IMFTopologyNode outputSinkNode = null;
IMFMediaType currentAudioMediaType = null;
int audioStreamIndex = -1;
LogMessage("PrepareSessionAndTopology ");
// we sanity check the filenames - the existence of the path and if the file already exists
// should have been checked before this call
if ((sourceFileName == null) || (sourceFileName.Length == 0))
{
throw new Exception("PrepareSessionAndTopology: source file name is invalid. Cannot continue.");
}
if ((outputFileName == null) || (outputFileName.Length == 0))
{
throw new Exception("PrepareSessionAndTopology: output file name is invalid. Cannot continue.");
}
try
{
// reset everything
CloseAllMediaDevices();
// Create the media session.
hr = MFExtern.MFCreateMediaSession(null, out mediaSession);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to MFExtern.MFCreateMediaSession failed. Err=" + hr.ToString());
}
if (mediaSession == null)
{
throw new Exception("PrepareSessionAndTopology call to MFExtern.MFCreateMediaSession failed. mediaSession == null");
}
// set up our media session call back handler.
mediaSessionAsyncCallbackHandler = new TantaAsyncCallbackHandler();
mediaSessionAsyncCallbackHandler.Initialize();
mediaSessionAsyncCallbackHandler.MediaSession = mediaSession;
mediaSessionAsyncCallbackHandler.MediaSessionAsyncCallBackError = HandleMediaSessionAsyncCallBackErrors;
mediaSessionAsyncCallbackHandler.MediaSessionAsyncCallBackEvent = HandleMediaSessionAsyncCallBackEvent;
// Register the callback handler with the session and tell it that events can
// start. This does not actually trigger an event it just lets the media session
// know that it can now send them if it wishes to do so.
hr = mediaSession.BeginGetEvent(mediaSessionAsyncCallbackHandler, null);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to mediaSession.BeginGetEvent failed. Err=" + hr.ToString());
}
// Create a new topology. A topology describes a collection of media sources, sinks, and transforms that are
// connected in a certain order. These objects are represented within the topology by topology nodes,
// which expose the IMFTopologyNode interface. A topology describes the path of multimedia data through these nodes.
hr = MFExtern.MFCreateTopology(out pTopology);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to MFExtern.MFCreateTopology failed. Err=" + hr.ToString());
}
if (pTopology == null)
{
throw new Exception("PrepareSessionAndTopology call to MFExtern.MFCreateTopology failed. pTopology == null");
}
// ####
// #### we now create the media source, this is an audio file
// ####
// use the file name to create the media source for the audio device. Media sources are objects that generate media data.
// For example, the data might come from a video file, a network stream, or a hardware device, such as a camera. Each
// media source contains one or more streams, and each stream delivers data of one type, such as audio or video.
mediaSource = TantaWMFUtils.GetMediaSourceFromFile(sourceFileName);
if (mediaSource == null)
{
throw new Exception("PrepareSessionAndTopology call to mediaSource == null");
}
// A presentation is a set of related media streams that share a common presentation time. We now get a copy of the media
// source's presentation descriptor. Applications can use the presentation descriptor to select streams
// and to get information about the source content.
hr = mediaSource.CreatePresentationDescriptor(out sourcePresentationDescriptor);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to mediaSource.CreatePresentationDescriptor failed. Err=" + hr.ToString());
}
if (sourcePresentationDescriptor == null)
{
throw new Exception("PrepareSessionAndTopology call to mediaSource.CreatePresentationDescriptor failed. sourcePresentationDescriptor == null");
}
// Now we get the number of stream descriptors in the presentation. A presentation descriptor contains a list of one or more
// stream descriptors. These describe the streams in the presentation. Streams can be either selected or deselected. Only the
// selected streams produce data. Deselected streams are not active and do not produce any data.
hr = sourcePresentationDescriptor.GetStreamDescriptorCount(out sourceStreamCount);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to sourcePresentationDescriptor.GetStreamDescriptorCount failed. Err=" + hr.ToString());
}
if (sourceStreamCount == 0)
{
throw new Exception("PrepareSessionAndTopology call to sourcePresentationDescriptor.GetStreamDescriptorCount failed. sourceStreamCount == 0");
}
// Look at each stream, there can be more than one stream here
// Usually only one is enabled. This app uses the first "selected"
// stream we come to which has the appropriate media type
for (int i = 0; i < sourceStreamCount; i++)
{
// we require the major type to be audio
Guid guidMajorType = TantaWMFUtils.GetMajorMediaTypeFromPresentationDescriptor(sourcePresentationDescriptor, i);
if (guidMajorType != MFMediaType.Audio)
{
continue;
}
// we also require the stream to be enabled
hr = sourcePresentationDescriptor.GetStreamDescriptorByIndex(i, out streamIsSelected, out audioStreamDescriptor);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to sourcePresentationDescriptor.GetStreamDescriptorByIndex failed. Err=" + hr.ToString());
}
if (audioStreamDescriptor == null)
{
throw new Exception("PrepareSessionAndTopology call to sourcePresentationDescriptor.GetStreamDescriptorByIndex failed. audioStreamDescriptor == null");
}
// if the stream is selected, leave now we will release the audioStream descriptor later
if (streamIsSelected == true)
{
audioStreamIndex = i; // record this
break;
}
// release the one we are not using
if (audioStreamDescriptor != null)
{
Marshal.ReleaseComObject(audioStreamDescriptor);
audioStreamDescriptor = null;
}
audioStreamIndex = -1;
}
// by the time we get here we should have a audioStreamDescriptor if
// we do not, then we cannot proceed
if (audioStreamDescriptor == null)
{
throw new Exception("PrepareSessionAndTopology call to sourcePresentationDescriptor.GetStreamDescriptorByIndex failed. audioStreamDescriptor == null");
}
if (audioStreamIndex < 0)
{
throw new Exception("PrepareSessionAndTopology call to sourcePresentationDescriptor.GetStreamDescriptorByIndex failed. audioStreamIndex < 0");
}
// ####
// #### we now create the media sink, we need the type from the stream to do
// #### this which is why we wait until now to set it up
// ####
currentAudioMediaType = TantaWMFUtils.GetCurrentMediaTypeFromStreamDescriptor(audioStreamDescriptor);
if (currentAudioMediaType == null)
{
throw new Exception("PrepareSessionAndTopology call to currentAudioMediaType == null");
}
mediaSink = OpenMediaFileSink(outputFileName);
if (mediaSink == null)
{
throw new Exception("PrepareSessionAndTopology call to mediaSink == null");
}
// ####
// #### we now make up a topology branch for the audio stream
// ####
// Create a source node for this stream.
sourceAudioNode = TantaWMFUtils.CreateSourceNodeForStream(mediaSource, sourcePresentationDescriptor, audioStreamDescriptor);
if (sourceAudioNode == null)
{
throw new Exception("PrepareSessionAndTopology call to CreateSourceNodeForStream failed. pSourceNode == null");
}
// Create the output node - this is a file sink in this case.
outputSinkNode = TantaWMFUtils.CreateSinkNodeForStream(mediaSink);
if (outputSinkNode == null)
{
throw new Exception("PrepareSessionAndTopology call to CreateOutputNodeForStream failed. outputSinkNode == null");
}
// Add the nodes to the topology. First the source
hr = pTopology.AddNode(sourceAudioNode);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to pTopology.AddNode(sourceAudioNode) failed. Err=" + hr.ToString());
}
// then add the output
hr = pTopology.AddNode(outputSinkNode);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to pTopology.AddNode(outputSinkNode) failed. Err=" + hr.ToString());
}
// Connect the output stream from the source node to the input stream of the output node. The parameters are:
// dwOutputIndex - Zero-based index of the output stream on this node.
// *pDownstreamNode - Pointer to the IMFTopologyNode interface of the node to connect to.
// dwInputIndexOnDownstreamNode - Zero-based index of the input stream on the other node.
hr = sourceAudioNode.ConnectOutput(0, outputSinkNode, 0);
if (hr != HResult.S_OK)
{
throw new Exception("PrepareSessionAndTopology call to pSourceNode.ConnectOutput failed. Err=" + hr.ToString());
}
// Set the topology on the media session.
// If SetTopology succeeds, the media session will queue an
// MESessionTopologySet event.
hr = mediaSession.SetTopology(0, pTopology);
MFError.ThrowExceptionForHR(hr);
// Release the topology
if (pTopology != null)
{
Marshal.ReleaseComObject(pTopology);
}
}
catch (Exception ex)
{
LogMessage("Error: " + ex.Message);
OISMessageBox(ex.Message);
}
finally
{
// Clean up
if (pSourceResolver != null)
{
Marshal.ReleaseComObject(pSourceResolver);
}
if (sourcePresentationDescriptor != null)
{
Marshal.ReleaseComObject(sourcePresentationDescriptor);
}
if (audioStreamDescriptor != null)
{
Marshal.ReleaseComObject(audioStreamDescriptor);
}
if (sourceAudioNode != null)
{
Marshal.ReleaseComObject(sourceAudioNode);
}
if (outputSinkNode != null)
{
Marshal.ReleaseComObject(outputSinkNode);
}
if (currentAudioMediaType != null)
{
Marshal.ReleaseComObject(currentAudioMediaType);
}
}
}
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();
}
