public static void MFCreateSourceResolver(out IMFSourceResolver sourceResolver)
{
int result = ExternMFCreateSourceResolver(out sourceResolver);
if (result < 0)
{
throw new COMException("Exception from HRESULT: 0x" + result.ToString("X", System.Globalization.NumberFormatInfo.InvariantInfo) + " (MFCreateSourceResolver)", result);
}
}
/// <summary>
/// Creates a byte stream from a URL.
/// </summary>
/// <param name="sourceResolver">A valid IMFSourceResolver instance.</param>
/// <param name="url">A string that contains the URL to resolve.</param>
/// <param name="flags">One or more members of the MFResolution enumeration.</param>
/// <param name="properties">An instance of the IPropertyStore interface of a property store. The method passes the property store to the scheme handler or byte-stream handler that creates the object.</param>
/// <param name="byteStream">Receives a byte stream that can handle the media file targeted by <paramref name="url"/>.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult CreateObjectFromURL(this IMFSourceResolver sourceResolver, string url, MFResolution flags, IPropertyStore properties, out IMFByteStream byteStream)
{
if (sourceResolver == null)
{
throw new ArgumentNullException("sourceResolver");
}
flags &= ~MFResolution.MediaSource;
flags |= MFResolution.ByteStream;
MFObjectType objectType;
object tmp;
HResult hr = sourceResolver.CreateObjectFromURL(url, flags, properties, out objectType, out tmp);
byteStream = hr.Succeeded() ? tmp as IMFByteStream : null;
return(hr);
}
private static HResult CreateMediaSource(string videoFile, out IMFMediaSource source)
{
IMFSourceResolver resolver = null;
source = null;
HResult hr = MF.CreateSourceResolver(out resolver);
if (Failed(hr))
{
return(hr);
}
hr = resolver.CreateObjectFromURL(videoFile, MFResolution.MediaSource, null, out source);
if (Failed(hr))
{
SafeRelease(source);
}
SafeRelease(resolver);
return(hr);
}
/// <summary>
/// Based on https://docs.microsoft.com/en-us/windows/desktop/medfound/shell-metadata-providers
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void infoToolStripMenuItem_Click(object sender, EventArgs e)
{
IMFSourceResolver pSourceResolver = null;
IMFMediaSource pSource = null;
object pPropsObject = null;
var url = this.listView1.SelectedItems[0].Text;
try
{
// Create the source resolver.
HResult hr = MFExtern.MFCreateSourceResolver(out pSourceResolver);
Validate(hr);
if (pSourceResolver == null)
{
throw new Exception("pSourceResolver is null");
}
// Get a pointer to the IMFMediaSource interface of the media source.
hr = pSourceResolver.CreateObjectFromURL(url, MFResolution.MediaSource, null, out pSource);
Validate(hr);
if (pSource == null)
{
throw new Exception("pSource is null");
}
hr = MFExtern.MFGetService(pSource, MFServices.MF_PROPERTY_HANDLER_SERVICE, typeof(IPropertyStore).GUID, out pPropsObject);
Validate(hr);
if (pPropsObject == null)
{
throw new Exception("pPropsObject is null");
}
IPropertyStore pProps = pPropsObject as IPropertyStore;
hr = pProps.GetCount(out int cProps);
Validate(hr);
var audioInfo = new AudioInfo();
var videoInfo = new VideoInfo();
for (int i = 0; i < cProps; ++i)
{
var key = new MediaFoundation.Misc.PropertyKey();
hr = pProps.GetAt(i, key);
Validate(hr);
using (PropVariant pv = new PropVariant())
{
hr = pProps.GetValue(key, pv);
Validate(hr);
FillAudioProperty(audioInfo, key, pv);
FillVideoProperty(videoInfo, key, pv);
}
}
MessageBox.Show("Audio =\n" + audioInfo + ";\nVideo =\n" + videoInfo);
}
finally
{
if (pSource != null)
{
Marshal.ReleaseComObject(pSource);
}
if (pSourceResolver != null)
{
Marshal.ReleaseComObject(pSourceResolver);
}
if (pPropsObject != null)
{
Marshal.ReleaseComObject(pPropsObject);
}
}
// MessageBox.Show(url);
}
public static void MFCreateSourceResolver(out IMFSourceResolver sourceResolver)
{
int result = ExternMFCreateSourceResolver(out sourceResolver);
if (result < 0)
{
throw new COMException("Exception from HRESULT: 0x" + result.ToString("X", System.Globalization.NumberFormatInfo.InvariantInfo) + " (MFCreateSourceResolver)", result);
}
}
public static extern void MFCreateSourceResolver(out IMFSourceResolver ppISourceResolver);
/// <summary>
/// Creates a media source from a Uri.
/// </summary>
/// <param name="sourceResolver">A valid IMFSourceResolver instance.</param>
/// <param name="url">A Uri that contains the URL to resolve.</param>
/// <param name="flags">One or more members of the MFResolution enumeration.</param>
/// <param name="properties">An instance of the IPropertyStore interface of a property store. The method passes the property store to the scheme handler or byte-stream handler that creates the object.</param>
/// <param name="mediaSource">Receives a media source that can handle the media file targeted by <paramref name="url"/>.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult CreateObjectFromURL(this IMFSourceResolver sourceResolver, Uri url, MFResolution flags, IPropertyStore properties, out IMFMediaSource mediaSource)
{
return(CreateObjectFromURL(sourceResolver, url.ToString(), flags, properties, out mediaSource));
}
/// <summary>
/// Creates a media source from a byte stream.
/// </summary>
/// <param name="sourceResolver">A valid IMFSourceResolver instance.</param>
/// <param name="byteStream">An instance of the byte stream's IMFByteStream interface.</param>
/// <param name="flags">One or more members of the MFResolution enumeration.</param>
/// <param name="properties">An instance of the IPropertyStore interface of a property store. The method passes the property store to the scheme handler or byte-stream handler that creates the object.</param>
/// <param name="mediaSource">Receives a media source that can handle the provided byte stream.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult CreateObjectFromByteStream(this IMFSourceResolver sourceResolver, IMFByteStream byteStream, MFResolution flags, IPropertyStore properties, out IMFMediaSource mediaSource)
{
return(CreateObjectFromByteStream(sourceResolver, byteStream, (string)null, flags, properties, out mediaSource));
}
void ValidateMP4OutputFile(string mp4filepath)
{
ulong duration = 0;
uint videoWidth = 0;
uint videoHeight = 0;
double videoFPS = 0.0;
uint videoBitrate = 0;
try
{
IMFMediaSource mediaSource = null;
IMFSourceReader sourceReader = null;
ulong videoSize = 0;
ulong frameRate = 0;
MFHelper.IMFMediaType mediaType = null;
IMFPresentationDescriptor presentationDescriptor = null;
uint objectType = default(uint);
object objectSource = null;
API.MFStartup();
// Create the media source using source resolver and the input URL
IMFSourceResolver sourceResolver = null;
API.MFCreateSourceResolver(out sourceResolver);
// sourceResolver.CreateObjectFromURL("..\\..\\Apps\\SmartCam\\SmartRecorder\\Output\\VideoWriterTest\\CreateTestWMVFile_640x480_24fps_15s\\TestMP4File_640x480_24fps_15s.mp4", Consts.MF_RESOLUTION_MEDIASOURCE, null, out objectType, out objectSource);
sourceResolver.CreateObjectFromURL(mp4filepath, Consts.MF_RESOLUTION_MEDIASOURCE, null, out objectType, out objectSource);
mediaSource = (IMFMediaSource)objectSource;
API.MFCreateSourceReaderFromMediaSource(mediaSource, null, out sourceReader);
mediaSource.CreatePresentationDescriptor(out presentationDescriptor);
// Get the duration
presentationDescriptor.GetUINT64(new Guid(Consts.MF_PD_DURATION), out duration);
// Get the video width and height
sourceReader.GetCurrentMediaType(0, out mediaType);
mediaType.GetUINT64(Guid.Parse(Consts.MF_MT_FRAME_SIZE), out videoSize);
videoWidth = (uint)(videoSize >> 32);
videoHeight = (uint)(videoSize & 0x00000000FFFFFFFF);
// Get the Frame Rate
mediaType.GetUINT64(Guid.Parse(Consts.MF_MT_FRAME_RATE), out frameRate);
if ((frameRate & 0x00000000FFFFFFFF) != 0)
{
videoFPS = (double)(frameRate >> 32) / (double)(frameRate & 0x00000000FFFFFFFF);
}
// Get the encoding bitrate
mediaType.GetUINT32(new Guid(Consts.MF_MT_AVG_BITRATE), out videoBitrate);
API.MFShutdown();
}
catch (Exception exception)
{
Console.WriteLine("Exception failure: {0}", exception.ToString());
Assert.IsFalse(true);
}
Assert.IsFalse(Math.Abs((double)duration - (double)VIDEO_DURATION_IN_100_NS) > (double)VIDEO_DURATION_VAR_IN_100_NS);
Assert.IsFalse(videoWidth != VIDEO_WIDTH);
Assert.IsFalse(videoHeight != VIDEO_HEIGHT);
Assert.IsFalse(Math.Abs(videoFPS - VIDEO_FPS) > VIDEO_FPS_VAR);
Assert.IsFalse(Math.Abs((int)videoBitrate - VIDEO_ENCODE_BITRATE) > VIDEO_ENCODE_BITRATE_VAR);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <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);
}
}
}
/// <summary>
/// Starts the asychronous encode operation
/// </summary>
/// <param name="inputURL">Source filename</param>
/// <param name="outputURL">Targe filename</param>
/// <param name="audioOutput">Audio format that will be used for audio streams</param>
/// <param name="videoOutput">Video format that will be used for video streams</param>
/// <param name="startPosition">Starting position of the contet</param>
/// <param name="endPosition">Position where the new content will end</param>
public void Encode(string inputURL, string outputURL, AudioFormat audioOutput, VideoFormat videoOutput, ulong startPosition, ulong endPosition)
{
// If busy with other operation ignore and return
if (this.IsBusy())
{
return;
}
try
{
this.presentationClock = null;
this.startPosition = startPosition;
this.endPosition = endPosition;
object objectSource = null;
// Create the media source using source resolver and the input URL
uint objectType = default(uint);
this.mediaSource = null;
// Init source resolver
IMFSourceResolver sourceResolver = null;
MFHelper.MFCreateSourceResolver(out sourceResolver);
sourceResolver.CreateObjectFromURL(inputURL, Consts.MF_RESOLUTION_MEDIASOURCE, null, out objectType, out objectSource);
this.mediaSource = (IMFMediaSource)objectSource;
// Create the media session using a global start time so MF_TOPOLOGY_PROJECTSTOP can be used to stop the session
this.mediaSession = null;
IMFAttributes mediaSessionAttributes = null;
MFHelper.MFCreateAttributes(out mediaSessionAttributes, 1);
mediaSessionAttributes.SetUINT32(new Guid(Consts.MF_SESSION_GLOBAL_TIME), 1);
MFHelper.MFCreateMediaSession(mediaSessionAttributes, out this.mediaSession);
// Create the event handler
AsyncEventHandler mediaEventHandler = new AsyncEventHandler(this.mediaSession);
mediaEventHandler.MediaEvent += this.MediaEvent;
// Get the stream descriptor
IMFPresentationDescriptor presentationDescriptor = null;
mediaSource.CreatePresentationDescriptor(out presentationDescriptor);
// Get the duration
presentationDescriptor.GetUINT64(new Guid(Consts.MF_PD_DURATION), out this.duration);
IMFTranscodeProfile transcodeProfile = null;
Guid containerType = new Guid(Consts.MFTranscodeContainerType_MPEG4);
if (outputURL.EndsWith(".wmv", StringComparison.OrdinalIgnoreCase) || outputURL.EndsWith(".wma", StringComparison.OrdinalIgnoreCase))
{
containerType = new Guid(Consts.MFTranscodeContainerType_ASF);
}
// Generate the transcoding profile
transcodeProfile = SimpleFastEncode.CreateProfile(audioOutput, videoOutput, containerType);
// Create the MF topology using the profile
IMFTopology topology = null;
MFHelper.MFCreateTranscodeTopology(this.mediaSource, outputURL, transcodeProfile, out topology);
// Set the end position
topology.SetUINT64(new Guid(Consts.MF_TOPOLOGY_PROJECTSTART), 0);
topology.SetUINT64(new Guid(Consts.MF_TOPOLOGY_PROJECTSTOP), (endPosition == 0) ? this.duration : endPosition);
// Set the session topology
this.mediaSession.SetTopology((uint)Enums.MFSESSION_SETTOPOLOGY_FLAGS.None, topology);
}
catch (Exception ex)
{
this.mediaSession = null;
// Fire the EncodeError event
if (this.EncodeError != null)
{
this.EncodeError(new Exception(ex.Message, ex));
}
}
}
public override void StartStream()
{
Task.Run(() =>
{
// check our source filename is correct and usable
StreamReaderHandler = new StreamHandler(ProcessFrame, MFBPressed);
HResult hr;
IMFSourceResolver pSourceResolver = null;
IMFPresentationDescriptor sourcePresentationDescriptor = null;
IMFStreamDescriptor videoStreamDescriptor = null;
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());
}
// set up our media session call back handler.
mediaSessionAsyncCallbackHandler = new AsyncCallbackHandler();
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());
}
StreamReader = WMFUtils.CreateSourceReaderAsyncFromDevice(UnderlyingDevice, StreamReaderHandler);
try
{
SetCurrentMediaType(StreamReader, IMFStreamIndex, 0);
}
catch
{
}
try
{
SetCurrentMediaType(StreamReader, IMFSnapIndex, 1);
}
catch
{
}
StreamReaderHandler.StreamReader = StreamReader;
StreamReader.GetCurrentMediaType(1, out IMFMediaType ppMediaType);
StreamReader.GetNativeMediaType(1, 0, out IMFMediaType PPMediaType);
StreamReader.GetCurrentMediaType(0, out IMFMediaType ppMediaType1);
StreamReader.GetNativeMediaType(0, 0, out IMFMediaType PPMediaType1);
ppMediaType.GetMajorType(out Guid ppMediaTypeMGUID);
PPMediaType.GetMajorType(out Guid PPMediaTypeMGUID);
ppMediaType.GetGUID(MFAttributesClsid.MF_MT_SUBTYPE, out Guid ppMediaTypeSGUID);
PPMediaType.GetGUID(MFAttributesClsid.MF_MT_SUBTYPE, out Guid PPMediaTypeSGUID);
Console.WriteLine(WMFUtils.ConvertGuidToName(ppMediaTypeMGUID));
Console.WriteLine(WMFUtils.ConvertGuidToName(PPMediaTypeMGUID));
Console.WriteLine(WMFUtils.ConvertGuidToName(ppMediaTypeSGUID));
Console.WriteLine(WMFUtils.ConvertGuidToName(PPMediaTypeSGUID));
ppMediaType1.GetMajorType(out Guid ppMediaTypeMGUID1);
PPMediaType1.GetMajorType(out Guid PPMediaTypeMGUID1);
ppMediaType1.GetGUID(MFAttributesClsid.MF_MT_SUBTYPE, out Guid ppMediaTypeSGUID1);
PPMediaType1.GetGUID(MFAttributesClsid.MF_MT_SUBTYPE, out Guid PPMediaTypeSGUID1);
Console.WriteLine(WMFUtils.ConvertGuidToName(ppMediaTypeMGUID1));
Console.WriteLine(WMFUtils.ConvertGuidToName(PPMediaTypeMGUID1));
Console.WriteLine(WMFUtils.ConvertGuidToName(ppMediaTypeSGUID1));
Console.WriteLine(WMFUtils.ConvertGuidToName(PPMediaTypeSGUID1));
Paused = false;
StreamReader.SetStreamSelection(0, true);
StreamReader.SetStreamSelection(1, true);
hr = StreamReader.ReadSample(
0,
MediaFoundation.ReadWrite.MF_SOURCE_READER_CONTROL_FLAG.None,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero
);
hr = StreamReader.ReadSample(1,
MediaFoundation.ReadWrite.MF_SOURCE_READER_CONTROL_FLAG.None,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero
);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on calling the first ReadSample on the reader, retVal=" + hr.ToString());
}
}
catch (Exception ex)
{
Console.WriteLine("PrepareSessionAndTopology Error: " + ex.Message);
}
finally
{
// Clean up
if (pSourceResolver != null)
{
Marshal.ReleaseComObject(pSourceResolver);
}
if (sourcePresentationDescriptor != null)
{
Marshal.ReleaseComObject(sourcePresentationDescriptor);
}
if (videoStreamDescriptor != null)
{
Marshal.ReleaseComObject(videoStreamDescriptor);
}
}
});
}
private static extern int ExternMFCreateSourceResolver(
[Out, MarshalAs(UnmanagedType.Interface)] out IMFSourceResolver ppISourceResolver);
static extern HResult MFCreateSourceResolver(
out IMFSourceResolver ppISourceResolver
);
