/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Gets the major media type of a IMFMediaType as a text string
///
/// Adapted from
/// https://msdn.microsoft.com/en-us/library/windows/desktop/ee663602(v=vs.85).aspx
/// </summary>
/// <returns>S_OK for success, nz for fail</returns>
/// <param name="mediaTypeObj">the media type object</param>
/// <param name="outSb">The output string</param>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public static HResult GetMediaSubTypeAsText(IMFMediaType mediaTypeObj, out StringBuilder outSb)
{
Guid subType;
HResult hr;
// we always return something here
outSb = new StringBuilder();
// sanity check
if (mediaTypeObj == null)
{
return(HResult.E_FAIL);
}
// MF_MT_SUBTYPE
// Subtype GUID which describes the basic media type, we return this as human readable text
hr = mediaTypeObj.GetGUID(MFAttributesClsid.MF_MT_SUBTYPE, out subType);
if (hr == HResult.S_OK)
{
// only report success
outSb.Append("MF_MT_SUBTYPE=" + TantaWMFUtils.ConvertGuidToName(subType));
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Gets the major media type of a IMFMediaType as a text string
///
/// Adapted from
/// https://msdn.microsoft.com/en-us/library/windows/desktop/ee663602(v=vs.85).aspx
/// </summary>
/// <returns>S_OK for success, nz for fail</returns>
/// <param name="mediaTypeObj">the media type object</param>
/// <param name="outSb">The output string</param>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public static HResult GetMediaMajorTypeAsText(IMFMediaType mediaTypeObj, out StringBuilder outSb)
{
Guid majorType;
HResult hr;
// we always return something here
outSb = new StringBuilder();
// sanity check
if (mediaTypeObj == null)
{
return(HResult.E_FAIL);
}
// MF_MT_MAJOR_TYPE
// Major type GUID, we return this as human readable text
hr = mediaTypeObj.GetMajorType(out majorType);
if (hr == HResult.S_OK)
{
// only report success
outSb.Append("MF_MT_MAJOR_TYPE=" + TantaWMFUtils.ConvertGuidToName(majorType));
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Gets a list of all attributes contained in a media type and displays
/// them as a human readable name. More or less just for practice
///
/// Adapted from
/// https://msdn.microsoft.com/en-us/library/windows/desktop/ee663602(v=vs.85).aspx
/// </summary>
/// <returns>S_OK for success, nz for fail</returns>
/// <param name="mediaTypeObj">the media type object</param>
/// <param name="maxAttributes">the maximum number of attributes</param>
/// <param name="outSb">The output string</param>
/// <param name="ignoreMajorType">if true we ignore the major type attribute</param>
/// <param name="ignoreSubType">if true we ignore the sub type attribute</param>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public static HResult EnumerateAllAttributeNamesInMediaTypeAsText(IMFMediaType mediaTypeObj, bool ignoreMajorType, bool ignoreSubType, int maxAttributes, out StringBuilder outSb)
{
// we always return something here
outSb = new StringBuilder();
// sanity check
if (mediaTypeObj == null)
{
return(HResult.E_FAIL);
}
if ((mediaTypeObj is IMFAttributes) == false)
{
return(HResult.E_FAIL);
}
// set up to ignore
List <string> attributesToIgnore = new List <string>();
if (ignoreMajorType == true)
{
attributesToIgnore.Add("MF_MT_MAJOR_TYPE");
}
if (ignoreSubType == true)
{
attributesToIgnore.Add("MF_MT_SUBTYPE");
}
// just call the generic TantaWMFUtils Attribute Enumerator
return(TantaWMFUtils.EnumerateAllAttributeNamesAsText((mediaTypeObj as IMFAttributes), attributesToIgnore, maxAttributes, out outSb));
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Write the text on the output buffer
/// </summary>
/// <param name="outputMediaBuffer">Output buffer</param>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
private void WriteTextOnBuffer(IMFMediaBuffer outputMediaBuffer)
{
IntPtr destRawDataPtr = IntPtr.Zero; // Destination buffer.
int destStride = 0; // Destination stride.
bool destIs2D = false;
try
{
// Lock the output buffer. Use the IMF2DBuffer interface
// (if available) as it is faster
if ((outputMediaBuffer is IMF2DBuffer) == false)
{
// not an IMF2DBuffer - get the raw data from the IMFMediaBuffer
int maxLen = 0;
int currentLen = 0;
TantaWMFUtils.LockIMFMediaBufferAndGetRawData(outputMediaBuffer, out destRawDataPtr, out maxLen, out currentLen);
// the stride is always this. The Lock function does not return it
destStride = m_lStrideIfContiguous;
}
else
{
// we are an IMF2DBuffer, we get the stride here as well
TantaWMFUtils.LockIMF2DBufferAndGetRawData((outputMediaBuffer as IMF2DBuffer), out destRawDataPtr, out destStride);
destIs2D = true;
}
// count this now. We only use this to write it on the screen
m_FrameCount++;
// We could eventually offer the ability to write on other formats depending on the
// current media type. We have this hardcoded to ARGB for now
WriteImageOfTypeARGB(destRawDataPtr,
destStride,
m_imageWidthInPixels,
m_imageHeightInPixels);
// Set the data size on the output buffer. It probably is already there
// since the output buffer is the input buffer
HResult hr = outputMediaBuffer.SetCurrentLength(m_cbImageSize);
if (hr != HResult.S_OK)
{
throw new Exception("WriteTextOnBuffer call to outputMediaBuffer.SetCurrentLength failed. Err=" + hr.ToString());
}
}
finally
{
// we MUST unlock
if (destIs2D == false)
{
TantaWMFUtils.UnLockIMFMediaBuffer(outputMediaBuffer);
}
else
{
TantaWMFUtils.UnLockIMF2DBuffer((outputMediaBuffer as IMF2DBuffer));
}
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// The MFT defines a list of available media types for each input stream
/// and orders them by preference. This method enumerates the available
/// media types for an input stream.
///
/// Many clients will just "try it on" with their preferred media type
/// and if/when that gets rejected will start enumerating the types the
/// transform prefers in order to see if they have one in common
///
/// An override of the virtual version in TantaMFTBase_Sync.
/// </summary>
/// <param name="dwTypeIndex">The (zero-based) index of the type.</param>
/// <param name="pInputType">The input type supported by the MFT.</param>
/// <returns>S_Ok unless error.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
protected override HResult OnEnumInputTypes(int dwTypeIndex, out IMFMediaType pInputType)
{
// MF.Net Sample comments...
// I'd like to skip implementing this, but while some clients
// don't require it (PlaybackFX), some do (MEPlayer/IMFMediaEngine).
// Although frame counting should be able to run against any type,
// we must at a minimum provide a major type.
return(TantaWMFUtils.CreatePartialMediaType(dwTypeIndex, MFMediaType.Video, m_MediaSubtypes, out pInputType));
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Called when the sample grabber sink processes a sample. We can use this
/// to do what we want with the sample
/// </summary>
/// <param name="guidMajorMediaType">the media type</param>
/// <param name="sampleFlags">the sample flags</param>
/// <param name="sampleSize">the sample size</param>
/// <param name="sampleDuration">the sample duration</param>
/// <param name="sampleTimeStamp">the sample time</param>
/// <param name="sampleBuffer">the sample buffer</param>
/// <param name="sampleAttributes">the attributes for the sample</param>
/// <history>
/// 01 Nov 18 Cynic - Ported in
/// </history>
public HResult OnProcessSampleEx(Guid guidMajorMediaType, int sampleFlags, long sampleTimeStamp, long sampleDuration, IntPtr sampleBuffer, int sampleSize, IMFAttributes sampleAttributes)
{
IMFSample outputSample = null;
HResult hr;
try
{
if (sinkWriter == null)
{
string errMsg = "OnProcessSample, Error sinkWriter==null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
// we have all the information we need to create a new output sample
outputSample = TantaWMFUtils.CreateMediaSampleFromIntPtr(sampleFlags, sampleTimeStamp, sampleDuration, sampleBuffer, sampleSize, sampleAttributes);
if (outputSample == null)
{
string errMsg = "OnProcessSample, Error on call to CreateMediaSampleFromBuffer outputSample == null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
lock (sinkWriter)
{
// write the sample out
hr = sinkWriter.WriteSample(sinkWriterMediaStreamId, outputSample);
if (Failed(hr))
{
string errMsg = "OnProcessSample, Error on WriteSample =" + hr.ToString();
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(hr);
}
// if you do not set MF_SINK_WRITER_DISABLE_THROTTLING on the sink writer, the
// calls below can sometimes be useful to avoid the sink writer stalling for a bit
// while it waits for one stream or the other. In fact is a bit disconcerting
// that we do not seem to get any of these in the sample grabber.
// sinkWriter.SendStreamTick(sinkWriterMediaStreamId, sampleTimeStamp);
// sinkWriter.NotifyEndOfSegment(sinkWriterMediaStreamId);
}
}
finally
{
if (outputSample != null)
{
Marshal.ReleaseComObject(outputSample);
outputSample = null;
}
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Get the buffers and sizes to be modified, then pass them
/// to the appropriate Update_* routine.
/// </summary>
/// <param name="inputMediaBuffer">the mediaBuffer</param>
/// <history>
/// 01 Nov 18 Cynic - Ported over
/// </history>
private void DoWork(IMFMediaBuffer inputMediaBuffer)
{
IntPtr srcRawDataPtr = IntPtr.Zero; // Source buffer.
int srcStride; // Source stride.
bool srcIs2D = false;
try
{
// Lock the input buffer. Use the IMF2DBuffer interface
// (if available) as it is faster
if ((inputMediaBuffer is IMF2DBuffer) == false)
{
// not an IMF2DBuffer - get the raw data from the IMFMediaBuffer
int maxLen = 0;
int currentLen = 0;
TantaWMFUtils.LockIMFMediaBufferAndGetRawData(inputMediaBuffer, out srcRawDataPtr, out maxLen, out currentLen);
// the stride is always this. The Lock function does not return it
srcStride = m_lStrideIfContiguous;
}
else
{
// we are an IMF2DBuffer, we get the stride here as well
TantaWMFUtils.LockIMF2DBufferAndGetRawData((inputMediaBuffer as IMF2DBuffer), out srcRawDataPtr, out srcStride);
srcIs2D = true;
}
// Invoke the image transform function.
if (TransformImageFunction != null)
{
TransformImageFunction(srcRawDataPtr, srcStride,
m_imageWidthInPixels, m_imageHeightInPixels);
}
else
{
throw new COMException("Transform type not set", (int)HResult.E_UNEXPECTED);
}
// Set the data size on the output buffer.
MFError throwonhr = inputMediaBuffer.SetCurrentLength(m_cbImageSize);
}
finally
{
if (srcIs2D == false)
{
TantaWMFUtils.UnLockIMFMediaBuffer(inputMediaBuffer);
}
else
{
TantaWMFUtils.UnLockIMF2DBuffer((inputMediaBuffer as IMF2DBuffer));
}
}
}
// ########################################################################
// ##### TantaMFTBase_Sync Overrides, all child classes must implement these
// ########################################################################
#region Overrides
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Returns a value indicating if the proposed input type is acceptable to
/// this MFT.
///
/// An override of the abstract version in TantaMFTBase_Sync.
/// </summary>
/// <param name="pmt">The type to check. Should never be null.</param>
/// <returns>S_Ok if the type is valid or MF_E_INVALIDTYPE.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
override protected HResult OnCheckInputType(IMFMediaType pmt)
{
HResult hr;
// We accept any input type as long as the output type
// has not been set yet
if (OutputType == null)
{
hr = HResult.S_OK;
}
else
{
// Otherwise, proposed input must be identical to the output.
hr = TantaWMFUtils.IsMediaTypeIdentical(pmt, OutputType);
}
return(hr);
}
// ########################################################################
// ##### TantaMFTBase_Sync Overrides, all child classes must implement these
// ########################################################################
#region Overrides
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Returns a value indicating if the proposed input type is acceptable to
/// this MFT.
///
/// An override of the abstract version in TantaMFTBase_Sync.
/// </summary>
/// <param name="pmt">The type to check. Should never be null.</param>
/// <returns>S_Ok if the type is valid or MF_E_INVALIDTYPE.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
override protected HResult OnCheckInputType(IMFMediaType pmt)
{
HResult hr;
// We assume the input type will get checked first
if (OutputType == null)
{
// we do not have an output type, check that the proposed
// input type is acceptable
hr = OnCheckMediaType(pmt);
}
else
{
// we have an output type
hr = TantaWMFUtils.IsMediaTypeIdentical(pmt, OutputType);
}
return(hr);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Called when the sample grabber sink processes a sample. We can use this
/// to do what we want with the media data
/// </summary>
/// <param name="guidMajorMediaType">the media type</param>
/// <param name="sampleFlags">the sample flags</param>
/// <param name="sampleSize">the sample size</param>
/// <param name="sampleDuration">the sample duration</param>
/// <param name="sampleTimeStamp">the sample time</param>
/// <param name="sampleBuffer">the sample buffer</param>
/// <param name="sampleAttributes">the attributes for the sample</param>
/// <history>
/// 01 Nov 18 Cynic - Ported in
/// </history>
public HResult OnProcessSampleEx(Guid guidMajorMediaType, int sampleFlags, long sampleTimeStamp, long sampleDuration, IntPtr sampleBuffer, int sampleSize, IMFAttributes sampleAttributes)
{
IMFSample outputSample = null;
HResult hr;
try
{
if (sinkWriter == null)
{
string errMsg = "OnProcessSample, Error sinkWriter==null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
// we have all the information we need to create a new output sample
outputSample = TantaWMFUtils.CreateMediaSampleFromIntPtr(sampleFlags, sampleTimeStamp, sampleDuration, sampleBuffer, sampleSize, null);
if (outputSample == null)
{
string errMsg = "OnProcessSample, Error on call to CreateMediaSampleFromBuffer outputSample == null";
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(HResult.E_FAIL);
}
// write the sample out
hr = sinkWriter.WriteSample(sinkWriterMediaStreamId, outputSample);
if (Failed(hr))
{
string errMsg = "OnProcessSample, Error on WriteSample =" + hr.ToString();
SampleGrabberAsyncCallBackError(this, errMsg, null);
return(hr);
}
}
finally
{
if (outputSample != null)
{
Marshal.ReleaseComObject(outputSample);
outputSample = null;
}
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Validates a media type for this transform. Since both input and output types must be
/// the same, they both call this routine.
/// </summary>
/// <param name="pmt">The media type to validate.</param>
/// <returns>S_Ok or MF_E_INVALIDTYPE.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported over
/// </history>
private HResult OnCheckMediaType(IMFMediaType pmt)
{
int interlace;
HResult hr = HResult.S_OK;
// see if the media type is one of our list of acceptable subtypes
hr = TantaWMFUtils.CheckMediaType(pmt, MFMediaType.Video, m_MediaSubtypes);
if (hr != HResult.S_OK)
{
throw new Exception("OnCheckMediaType call to TantaWMFUtils.CheckMediaType failed. Err=" + hr.ToString());
}
// Video must be progressive frames. Set this now
m_MightBeInterlaced = false;
// get the interlace mode
hr = pmt.GetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, out interlace);
if (hr != HResult.S_OK)
{
throw new Exception("OnCheckMediaType call to getting the interlace mode failed. Err=" + hr.ToString());
}
// set it now
MFVideoInterlaceMode im = (MFVideoInterlaceMode)interlace;
// Mostly we only accept Progressive.
if (im == MFVideoInterlaceMode.Progressive)
{
return(HResult.S_OK);
}
// If the type MIGHT be interlaced, we'll accept it.
if (im == MFVideoInterlaceMode.MixedInterlaceOrProgressive)
{
// But we will check to see if any samples actually
// are interlaced, and reject them.
m_MightBeInterlaced = true;
return(HResult.S_OK);
}
// not a valid option
return(HResult.MF_E_INVALIDTYPE);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Validates a media type for this transform. Since both input and output types must be
/// the same, they both call this routine.
/// </summary>
/// <param name="pmt">The media type to validate.</param>
/// <returns>S_Ok or MF_E_INVALIDTYPE.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported over
/// </history>
private HResult OnCheckMediaType(IMFMediaType pmt)
{
HResult hr;
// Check the Major and Subtype
hr = TantaWMFUtils.CheckMediaType(pmt, MFMediaType.Video, m_MediaSubtypes);
if (Succeeded(hr))
{
int interlace;
// Video must be progressive frames.
m_MightBeInterlaced = false;
MFError throwonhr = pmt.GetUINT32(MFAttributesClsid.MF_MT_INTERLACE_MODE, out interlace);
MFVideoInterlaceMode im = (MFVideoInterlaceMode)interlace;
// Mostly we only accept Progressive.
if (im != MFVideoInterlaceMode.Progressive)
{
// If the type MIGHT be interlaced, we'll accept it.
if (im != MFVideoInterlaceMode.MixedInterlaceOrProgressive)
{
hr = HResult.MF_E_INVALIDTYPE;
}
else
{
// But we will check to see if any samples actually
// are interlaced, and reject them.
m_MightBeInterlaced = true;
}
}
}
return(hr);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Displays the video devices on the system. Expects the MF system to have
/// been started.
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public void DisplayVideoCaptureDevices()
{
StringBuilder sb = new StringBuilder();
// Query MF for the devices, can also use MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_AUDCAP_GUID
// here to see the audio capture devices
List <TantaMFDevice> vcDevices = TantaWMFUtils.GetDevicesByCategory(MFAttributesClsid.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, CLSID.MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
if (vcDevices == null)
{
return;
}
foreach (TantaMFDevice mfDevice in vcDevices)
{
sb.Append("FriendlyName:" + mfDevice.FriendlyName);
sb.Append("\r\n");
sb.Append("Symbolic Name:" + mfDevice.SymbolicName);
sb.Append("\r\n");
sb.Append("\r\n");
}
// add all known devices
comboBoxCaptureDevices.DataSource = vcDevices;
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// The MFT defines a list of available media types for each input stream
/// and orders them by preference. This method enumerates the available
/// media types for an input stream.
///
/// Many clients will just "try it on" with their preferred media type
/// and if/when that gets rejected will start enumerating the types the
/// transform prefers in order to see if they have one in common
///
/// An override of the virtual version in TantaMFTBase_Async.
/// </summary>
/// <param name="dwTypeIndex">The (zero-based) index of the type.</param>
/// <param name="pInputType">The input type supported by the MFT.</param>
/// <returns>S_Ok unless error.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
override protected HResult OnEnumInputTypes(int dwTypeIndex, out IMFMediaType pInputType)
{
return(TantaWMFUtils.CreatePartialMediaType(dwTypeIndex, MFMediaType.Video, m_MediaSubtypes, out pInputType));
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Does everything to copy a file. Opens the Source Reader and Sink Writer
/// configures the streams and then, because a Synchronous version
/// of the Source Reader is used, we sit in a loop and perform the copy.
///
/// Any errors here simply throw an exception and must be trapped elsewhere
///
/// Note that because this code is intended for demo purposes, it has been
/// kept very simple and linear. Most of the things that could have been
/// refactored in a common procedure (audio and video streams) are simply
/// written out in duplicate in order to make it obvious what is going on.
/// </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 CopyFile(string sourceFileName, string outputFileName)
{
HResult hr;
int sinkWriterOutputVideoStreamId = -1;
int videoSamplesProcessed = 0;
bool videoStreamIsAtEOS = false;
int sourceReaderVideoStreamId = -1;
int sinkWriterOutputAudioStreamId = -1;
int audioSamplesProcessed = 0;
bool audioStreamIsAtEOS = false;
int sourceReaderAudioStreamId = -1;
// not keen on endless loops. This is the maximum number
// of streams we will check in the source reader.
const int MAX_SOURCEREADER_STREAMS = 100;
// create the SourceReader
sourceReader = TantaWMFUtils.CreateSourceReaderSyncFromFile(sourceFileName, DEFAULT_ALLOW_HARDWARE_TRANSFORMS);
if (sourceReader == null)
{
// we failed
throw new Exception("CopyFile: Failed to create SourceReader, Nothing will work.");
}
// create the SinkWriter
sinkWriter = TantaWMFUtils.CreateSinkWriterFromFile(outputFileName, DEFAULT_ALLOW_HARDWARE_TRANSFORMS);
if (sinkWriter == null)
{
// we failed
throw new Exception("CopyFile: Failed to create Sink Writer, Nothing will work.");
}
// find the first audio and video stream and identify the default Media Type
// they are using. We could look into the streams and enumerate all of the
// types on offer and choose one from the list - but for a copy operation
// the default will be quite suitable.
sourceReaderNativeVideoMediaType = null;
sourceReaderNativeAudioMediaType = null;
for (int streamIndex = 0; streamIndex < MAX_SOURCEREADER_STREAMS; streamIndex++)
{
IMFMediaType workingType = null;
Guid guidMajorType = Guid.Empty;
// if we have found both the video and audio types (and their stream ids) leave now
if ((sourceReaderNativeVideoMediaType != null) && (sourceReaderNativeAudioMediaType != null))
{
break;
}
hr = sourceReader.GetNativeMediaType(streamIndex, 0, out workingType);
if (hr == HResult.MF_E_NO_MORE_TYPES)
{
break;
}
if (hr == HResult.MF_E_INVALIDSTREAMNUMBER)
{
break;
}
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: failed on call to GetNativeMediaType, retVal=" + hr.ToString());
}
if (workingType == null)
{
// we failed
throw new Exception("CopyFile: failed on call to GetNativeMediaType, workingType == null");
}
// what major type does this stream have?
hr = workingType.GetMajorType(out guidMajorType);
if (hr != HResult.S_OK)
{
throw new Exception("CopyFile: call to workingType.GetMajorType failed. Err=" + hr.ToString());
}
if (guidMajorType == null)
{
throw new Exception("CopyFile: call to workingType.GetMajorType failed. guidMajorType == null");
}
// test for video or audio (there can be others)
if ((guidMajorType == MFMediaType.Video) && (sourceReaderNativeVideoMediaType == null))
{
// this stream represents a video type
sourceReaderNativeVideoMediaType = workingType;
sourceReaderVideoStreamId = streamIndex;
// the sourceReaderNativeVideoMediaType will be released elsewhere
continue;
}
else if ((guidMajorType == MFMediaType.Audio) && (sourceReaderNativeAudioMediaType == null))
{
// this stream represents a audio type
sourceReaderNativeAudioMediaType = workingType;
sourceReaderAudioStreamId = streamIndex;
// the sourceReaderNativeAudioMediaType will be released elsewhere
continue;
}
// if we get here release the type - we do not use it
if (workingType != null)
{
Marshal.ReleaseComObject(workingType);
workingType = null;
}
}
// at this point we expect we can have a native video or a native audio media type
// or both, but not neither. if we don't we cannot carry on
if ((sourceReaderNativeVideoMediaType == null) && (sourceReaderNativeAudioMediaType == null))
{
// we failed
throw new Exception("CopyFile: failed on call to GetNativeMediaType, sourceReaderNativeVideoMediaType == null");
}
// if we have a video stream in the source file we now set it up
if (sourceReaderNativeVideoMediaType != null)
{
// set the media type on the reader - this is the media type it will output
hr = sourceReader.SetCurrentMediaType(sourceReaderVideoStreamId, null, sourceReaderNativeVideoMediaType);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: failed on call to SetCurrentMediaType(v), retVal=" + hr.ToString());
}
// add a stream to the sink writer. The mediaType specifies the format of the samples that will be written
// to the file. Note that it does not necessarily need to match the input format. To set the input format
// use SetInputMediaType. In this case it does match because we copied the video encoder information directly
// out of the video source type
hr = sinkWriter.AddStream(sourceReaderNativeVideoMediaType, out sinkWriterOutputVideoStreamId);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed adding the output stream(v), retVal=" + hr.ToString());
}
// Set the input format for a stream on the sink writer. Note the use of the stream index here
// The input format does not have to match the target format that is written to the media sink
// If the formats do not match, this call attempts to load an transform
// that can convert from the input format to the target format. If it cannot find one, and this is not
// a sure thing, it will throw an exception.
hr = sinkWriter.SetInputMediaType(sinkWriterOutputVideoStreamId, sourceReaderNativeVideoMediaType, null);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling SetInputMediaType(v) on the writer, retVal=" + hr.ToString());
}
}
// if we have an audio stream in the source file we now set it up
if (sourceReaderNativeAudioMediaType != null)
{
// set the media type on the reader - this is the media type it will output
hr = sourceReader.SetCurrentMediaType(sourceReaderAudioStreamId, null, sourceReaderNativeAudioMediaType);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: failed on call to SetCurrentMediaType(a), retVal=" + hr.ToString());
}
// add a stream to the sink writer. The mediaType specifies the format of the samples that will be written
// to the file. Note that it does not necessarily need to match the input format. To set the input format
// use SetInputMediaType. In this case it does match because we copied the video encoder information directly
// out of the video source type
hr = sinkWriter.AddStream(sourceReaderNativeAudioMediaType, out sinkWriterOutputAudioStreamId);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed adding the output stream(a), retVal=" + hr.ToString());
}
// Set the input format for a stream on the sink writer. Note the use of the stream index here
// The input format does not have to match the target format that is written to the media sink
// If the formats do not match, this call attempts to load an transform
// that can convert from the input format to the target format. If it cannot find one, and this is not
// a sure thing, it will throw an exception.
hr = sinkWriter.SetInputMediaType(sinkWriterOutputAudioStreamId, sourceReaderNativeAudioMediaType, null);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling SetInputMediaType(a) on the writer, retVal=" + hr.ToString());
}
}
// begin writing on the sink writer
hr = sinkWriter.BeginWriting();
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: failed on call to BeginWriting, retVal=" + hr.ToString());
}
// we sit in a loop here and get the sample from the source reader and write it out
// to the sink writer. An EOS (end of sample) value in the flags will signal the end.
while (true)
{
int actualStreamIndex;
MF_SOURCE_READER_FLAG actualStreamFlags;
long timeStamp = 0;
IMFSample workingMediaSample = null;
// Request the next sample from the media source. Note that this could be
// any type of media sample (video, audio, subtitles etc). We do not know
// until we look at the stream ID. We saved the stream ID earlier when
// we obtained the media types and so we can branch based on that.
hr = sourceReader.ReadSample(
TantaWMFUtils.MF_SOURCE_READER_ANY_STREAM,
0,
out actualStreamIndex,
out actualStreamFlags,
out timeStamp,
out workingMediaSample
);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling the ReadSample on the reader, retVal=" + hr.ToString());
}
// the sample may be null if either end of stream or a stream tick is returned
if (workingMediaSample == null)
{
// just ignore, the flags will have the information we need.
}
else
{
// the sample is not null
if (actualStreamIndex == sourceReaderAudioStreamId)
{
// audio data
// ensure discontinuity is set for the first sample in each stream
if (audioSamplesProcessed == 0)
{
// audio data
hr = workingMediaSample.SetUINT32(MFAttributesClsid.MFSampleExtension_Discontinuity, 1);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling SetUINT32 on the sample, retVal=" + hr.ToString());
}
// remember this - we only do it once
audioSamplesProcessed++;
}
hr = sinkWriter.WriteSample(sinkWriterOutputAudioStreamId, workingMediaSample);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling the WriteSample on the writer, retVal=" + hr.ToString());
}
}
else if (actualStreamIndex == sourceReaderVideoStreamId)
{
// video data
// ensure discontinuity is set for the first sample in each stream
if (videoSamplesProcessed == 0)
{
// video data
hr = workingMediaSample.SetUINT32(MFAttributesClsid.MFSampleExtension_Discontinuity, 1);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling SetUINT32 on the sample, retVal=" + hr.ToString());
}
// remember this - we only do it once
videoSamplesProcessed++;
}
hr = sinkWriter.WriteSample(sinkWriterOutputVideoStreamId, workingMediaSample);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling the WriteSample on the writer, retVal=" + hr.ToString());
}
}
// release the sample
if (workingMediaSample != null)
{
Marshal.ReleaseComObject(workingMediaSample);
workingMediaSample = null;
}
}
// do we have a stream tick event?
if ((actualStreamFlags & MF_SOURCE_READER_FLAG.StreamTick) != 0)
{
if (actualStreamIndex == sourceReaderVideoStreamId)
{
// video stream
hr = sinkWriter.SendStreamTick(sinkWriterOutputVideoStreamId, timeStamp);
}
else if (actualStreamIndex == sourceReaderAudioStreamId)
{
// audio stream
hr = sinkWriter.SendStreamTick(sinkWriterOutputAudioStreamId, timeStamp);
}
else
{
}
}
// is this stream at an END of Segment
if ((actualStreamFlags & MF_SOURCE_READER_FLAG.EndOfStream) != 0)
{
// We have an EOS - but is it on the video or audio channel?
// we have to get it on both
if (actualStreamIndex == sourceReaderVideoStreamId)
{
// video stream
// have we seen this before?
if (videoStreamIsAtEOS == false)
{
hr = sinkWriter.NotifyEndOfSegment(sinkWriterOutputVideoStreamId);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling the NotifyEndOfSegment on video stream, retVal=" + hr.ToString());
}
videoStreamIsAtEOS = true;
}
}
else if (actualStreamIndex == sourceReaderAudioStreamId)
{
// audio stream
// have we seen this before?
if (audioStreamIsAtEOS == false)
{
hr = sinkWriter.NotifyEndOfSegment(sinkWriterOutputAudioStreamId);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("CopyFile: Failed on calling the NotifyEndOfSegment on audio stream, retVal=" + hr.ToString());
}
audioStreamIsAtEOS = true;
}
// audio stream
}
else
{
}
// our exit condition depends on which streams are in use
if ((sourceReaderNativeVideoMediaType != null) && (sourceReaderNativeAudioMediaType != null))
{
// if both streams are at EOS we can leave
if ((videoStreamIsAtEOS == true) && (audioStreamIsAtEOS == true))
{
break;
}
}
else if (sourceReaderNativeVideoMediaType != null)
{
// only video is active, if the video stream is EOS we can leave
if (videoStreamIsAtEOS == true)
{
break;
}
}
else if (sourceReaderNativeAudioMediaType != null)
{
// only audio is active, if the audio stream is EOS we can leave
if (audioStreamIsAtEOS == true)
{
break;
}
}
}
} // bottom of endless for loop
hr = sinkWriter.Finalize_();
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on call tosinkWriter.Finalize(), retVal=" + hr.ToString());
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Starts capture of the data to a file.
///
/// Because this code is intended for demo purposes and in the interests of
/// reducing complexity it is extremely linear and step-by-step. Doubtless
/// there is much refactoring that could be done.
///
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
private void CaptureToFile()
{
HResult hr;
IMFMediaType videoType = null;
IMFMediaType encoderType = null;
TantaMFDevice currentDevice = null;
try
{
// get the current video device.
currentDevice = ctlTantaVideoPicker1.CurrentDevice;
if (currentDevice == null)
{
MessageBox.Show("No current video device. Are there any video devices on this system?");
return;
}
// check our output filename is correct and usable
if ((textBoxCaptureFileNameAndPath == null) || (textBoxCaptureFileNameAndPath.Text.Length == 0))
{
MessageBox.Show("No Capture Filename and path. Cannot continue.");
return;
}
string pwszFileName = textBoxCaptureFileNameAndPath.Text;
// check the path is rooted
if (Path.IsPathRooted(pwszFileName) == false)
{
MessageBox.Show("No Capture Filename and path is not rooted. A full directory and path is required. Cannot continue.");
return;
}
// create a new call back handler. This, once we get it all wired up, will act
// as a pump to move the data from the source to the sink
workingSourceReaderCallBackHandler = new TantaSourceReaderCallbackHandler();
// the following code will create a SourceReader which is tied to a camera on the system,
// a SinkWriter which is tied to a file output and will hook up the two. Because we are using
// a SourceReader and SourceWriter we do not have the usual Topology or Pipeline. The SourceReader
// and SourceWriter are connected directly (input to output) in the code below and transfer their
// data via the callback handler. The callback handler also requests the next sample from
// the SourceReader when it has written the data to the sink. Note however it is possible
// that the SourceReader can automatically bring in a Transform for format conversion. This
// is done internally and you never deal with it - other than perhaps making it available
// to the process if it is not globally available.
// create the source reader
workingSourceReader = TantaWMFUtils.CreateSourceReaderAsyncFromDevice(currentDevice, workingSourceReaderCallBackHandler);
if (workingSourceReader == null)
{
MessageBox.Show("CreateSourceReaderAsyncFromDevice did not return a media source. Cannot continue.");
return;
}
// open up the sink Writer
workingSinkWriter = OpenSinkWriter(pwszFileName);
if (workingSinkWriter == null)
{
MessageBox.Show("OpenSinkWriter workingSinkWriter == null. Cannot continue.");
return;
}
// now set the source and the sink in the callback handler. It needs to know these
// in order to operate
workingSourceReaderCallBackHandler.SourceReader = workingSourceReader;
workingSourceReaderCallBackHandler.SinkWriter = workingSinkWriter;
workingSourceReaderCallBackHandler.InitForFirstSample();
workingSourceReaderCallBackHandler.SourceReaderAsyncCallBackError = HandleSourceReaderAsyncCallBackErrors;
// now we configure the video source. It will probably offer a lot of different types
// this example offers two modes: one mode where you choose the format and mode and
// effectively just say "Use this one". The other uses the general case where we
// present a list of reasonable types we can accept and then let it auto
// configure itself from one of those. Of course if it autoconfigures itself we
// don't know which one it has chosen. This is why, you will later see the video
// source being interrogated after the configuration so we know which one we hit.
if (radioButtonUseSpecified.Checked == true)
{
// we saved the video format container here - this is just the last one that came in
if ((radioButtonUseSpecified.Tag == null) || ((radioButtonUseSpecified.Tag is TantaMFVideoFormatContainer) == false))
{
MessageBox.Show("No source video device and format selected. Cannot continue.");
return;
}
// get the container
TantaMFVideoFormatContainer videoFormatCont = (radioButtonUseSpecified.Tag as TantaMFVideoFormatContainer);
// configure the Source Reader to use this format
hr = TantaWMFUtils.ConfigureSourceReaderWithVideoFormat(workingSourceReader, videoFormatCont);
if (hr != HResult.S_OK)
{
// we failed
MessageBox.Show("Failed on call to ConfigureSourceAsyncReaderWithVideoFormat (a), retVal=" + hr.ToString());
return;
}
}
else
{
// prepare a list of subtypes we are prepared to accept from the video source
// device. These will be tested in order - the first match will be used.
List <Guid> subTypes = new List <Guid>();
subTypes.Add(MFMediaType.NV12);
subTypes.Add(MFMediaType.YUY2);
subTypes.Add(MFMediaType.UYVY);
subTypes.Add(MFMediaType.RGB32);
subTypes.Add(MFMediaType.RGB24);
subTypes.Add(MFMediaType.IYUV);
// make sure the default Media Type is one of the above video formats
hr = TantaWMFUtils.ConfigureSourceReaderWithVideoFormat(workingSourceReader, subTypes, false);
if (hr != HResult.S_OK)
{
// we failed
MessageBox.Show("Failed on call to ConfigureSourceAsyncReaderWithVideoFormat (b), retVal=" + hr.ToString());
return;
}
}
// if we get here we know the source reader now has a configured format but we might not
// know which one it is. So we ask it. It will return a video type
// we will use this later on to configure our sink writer. Note, we have to properly dispose
// of the videoType object after we use it.
hr = workingSourceReader.GetCurrentMediaType(TantaWMFUtils.MF_SOURCE_READER_FIRST_VIDEO_STREAM, out videoType);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on call to GetCurrentMediaType, retVal=" + hr.ToString());
}
// now we configure the encoder. This sets up the sink writer so that it knows what format
// the output data should be written in. The format we give the writer does not
// need to be the same as the format it outputs to disk - however to make life easier for ourselves
// we will copy a lot of the settings from the videoType retrieved above
// create a new empty media type for us to populate
hr = MFExtern.MFCreateMediaType(out encoderType);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on call to MFCreateMediaType, retVal=" + hr.ToString());
}
// The major type defines the overall category of the media data. Major types include video, audio, script & etc.
hr = encoderType.SetGUID(MFAttributesClsid.MF_MT_MAJOR_TYPE, MFMediaType.Video);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed setting the MF_MT_MAJOR_TYPE, retVal=" + hr.ToString());
}
// The subtype GUID defines a specific media format type within a major type. For example, within video,
// the subtypes include MFMediaType.H264 (MP4), MFMediaType.WMV3 (WMV), MJPEG & etc. Within audio, the
// subtypes include PCM audio, Windows Media Audio 9, & etc.
hr = encoderType.SetGUID(MFAttributesClsid.MF_MT_SUBTYPE, MEDIA_TYPETO_WRITE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed setting the MF_MT_SUBTYPE, retVal=" + hr.ToString());
}
// this is the approximate data rate of the video stream, in bits per second, for a video media type
// in the MF.Net sample code this is 240000 but I found 2000000 to be much better. I am not sure,
// at this time, how this value is derived or what the tradeoffs are.
hr = encoderType.SetUINT32(MFAttributesClsid.MF_MT_AVG_BITRATE, TARGET_BIT_RATE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed setting the MF_MT_AVG_BITRATE, retVal=" + hr.ToString());
}
// populate our new encoding type with the frame size of the videoType selected earlier
hr = TantaWMFUtils.CopyAttributeData(videoType, encoderType, MFAttributesClsid.MF_MT_FRAME_SIZE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_FRAME_SIZE, retVal=" + hr.ToString());
}
// populate our new encoding type with the frame rate of the video type selected earlier
hr = TantaWMFUtils.CopyAttributeData(videoType, encoderType, MFAttributesClsid.MF_MT_FRAME_RATE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_FRAME_RATE, retVal=" + hr.ToString());
}
// populate our new encoding type with the pixel aspect ratio of the video type selected earlier
hr = TantaWMFUtils.CopyAttributeData(videoType, encoderType, MFAttributesClsid.MF_MT_PIXEL_ASPECT_RATIO);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_PIXEL_ASPECT_RATIO, retVal=" + hr.ToString());
}
// populate our new encoding type with the interlace mode of the video type selected earlier
hr = TantaWMFUtils.CopyAttributeData(videoType, encoderType, MFAttributesClsid.MF_MT_INTERLACE_MODE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_INTERLACE_MODE, retVal=" + hr.ToString());
}
// add a stream to the sink writer. The encoderType specifies the format of the samples that will be written
// to the file. Note that it does not necessarily need to match the input format. To set the input format
// use SetInputMediaType.
int sink_stream = 0;
hr = workingSinkWriter.AddStream(encoderType, out sink_stream);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed adding the output stream, retVal=" + hr.ToString());
}
// Windows 10, by default, provides an adequate set of codecs which the Sink Writer can
// find to write out the MP4 file. This is not true on Windows 7.
// If we are not on Windows 10 we register (locally) a codec
// the Sink Writer can find and use. The ColorConvertDMO is supplied by
// microsoft it is just not available to enumerate on Win7 etc.
// Making it available locally does not require administrator privs
// but only this process can see it and it disappears when the process
// closes
OperatingSystem os = Environment.OSVersion;
int versionID = ((os.Version.Major * 10) + os.Version.Minor);
if (versionID < 62)
{
Guid ColorConvertDMOGUID = new Guid("98230571-0087-4204-b020-3282538e57d3");
// Register the color converter DSP for this process, in the video
// processor category. This will enable the sink writer to enumerate
// the color converter when the sink writer attempts to match the
// media types.
hr = MFExtern.MFTRegisterLocalByCLSID(
ColorConvertDMOGUID,
MFTransformCategory.MFT_CATEGORY_VIDEO_PROCESSOR,
"",
MFT_EnumFlag.SyncMFT,
0,
null,
0,
null
);
}
// Set the input format for a stream on the sink writer. Note the use of the stream index here
// The input format does not have to match the target format that is written to the media sink
// If the formats do not match, this call attempts to load an transform
// that can convert from the input format to the target format. If it cannot find one, and this is not
// a sure thing, it will throw an exception.
hr = workingSinkWriter.SetInputMediaType(sink_stream, videoType, null);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on calling SetInputMediaType on the writer, retVal=" + hr.ToString());
}
// now we initialize the sink writer for writing. We call this method after configuring the
// input streams but before we send any data to the sink writer. The underlying media sink must
// have at least one input stream and we know it does because we set it up earlier
hr = workingSinkWriter.BeginWriting();
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on calling BeginWriting on the writer, retVal=" + hr.ToString());
}
// Request the first video frame from the media source. The TantaSourceReaderCallbackHandler
// set up earlier will be invoked and it will continue requesting and processing video
// frames after that.
hr = workingSourceReader.ReadSample(
TantaWMFUtils.MF_SOURCE_READER_FIRST_VIDEO_STREAM,
0,
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());
}
// we are ready to start, flag this
buttonStartStopCapture.Text = STOP_CAPTURE;
// disable our screen controls
SetEnableStateOnScreenControls(false);
}
finally
{
// setting this to null will cause it to be cleaned up
currentDevice = null;
// close and release
if (videoType != null)
{
Marshal.ReleaseComObject(videoType);
videoType = null;
}
if (encoderType != null)
{
Marshal.ReleaseComObject(encoderType);
encoderType = null;
}
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Displays the video formats for the currently selected video device. This
/// is more complicated than it looks. We have to open the video source, convert
/// that to a Media Source and then interrogate the that source to find a list
/// of video formats.
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
private void DisplayVideoFormatsForCurrentCaptureDevice()
{
IMFSourceReaderAsync tmpSourceReader = null;
List <TantaMFVideoFormatContainer> formatList;
HResult hr;
try
{
// clear what we have now
listViewSupportedFormats.Clear();
// reset this
listViewSupportedFormats.ListViewItemSorter = null;
// get the currently selected device
TantaMFDevice currentDevice = (TantaMFDevice)comboBoxCaptureDevices.SelectedItem;
if (currentDevice == null)
{
return;
}
// open up the media source
tmpSourceReader = TantaWMFUtils.CreateSourceReaderAsyncFromDevice(currentDevice, null);
if (tmpSourceReader == null)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice, CreateSourceReaderAsyncFromDevice did not return a media source. Cannot continue.");
}
// now get a list of all supported formats from the video device
hr = TantaMediaTypeInfo.GetSupportedVideoFormatsFromSourceReaderInFormatContainers(currentDevice, tmpSourceReader, 100, out formatList);
if (hr != HResult.S_OK)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice, GetSupportedVideoFormatsFromSourceReaderInFormatContainers failed. HR=" + hr.ToString());
}
if (formatList == null)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice, GetSupportedVideoFormatsFromSourceReaderInFormatContainers did not return a format list. Cannot continue.");
}
// now display the formats
foreach (TantaMFVideoFormatContainer videoFormat in formatList)
{
ListViewItem lvi = new ListViewItem(new[] { videoFormat.SubTypeAsString, videoFormat.FrameSizeAsString, videoFormat.FrameRateAsString, videoFormat.FrameRateMaxAsString, videoFormat.AllAttributes });
lvi.Tag = videoFormat;
listViewSupportedFormats.Items.Add(lvi);
}
listViewSupportedFormats.Columns.Add("Type", 70);
listViewSupportedFormats.Columns.Add("FrameSize WxH", 100);
listViewSupportedFormats.Columns.Add("FrameRate f/s", 100);
listViewSupportedFormats.Columns.Add("FrameRateMax f/s", 100);
listViewSupportedFormats.Columns.Add("All Attributes", 2500);
}
finally
{
if (tmpSourceReader != null)
{
// close and release
Marshal.ReleaseComObject(tmpSourceReader);
tmpSourceReader = null;
}
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Displays the transforms for the currently selected category. Since each
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
private void DisplayTransformsForCurrentCategory()
{
int numResults;
IMFActivate[] activatorArray;
List <TantaMFTCapabilityContainer> transformList = new List <TantaMFTCapabilityContainer>();
HResult hr;
try
{
// clear what we have now
listViewAvailableTransforms.Clear();
// reset this
listViewAvailableTransforms.ListViewItemSorter = null;
// get the currently selected major category
TantaGuidNamePair currentCategory = (TantaGuidNamePair)comboBoxTransformCategories.SelectedItem;
if (currentCategory == null)
{
return;
}
// we have multiple sub-categories. These are set by specific flags on the MFTEnumX call. We iterate
// through each flag and get the matching transforms. If we already have it we just set the flag on
// the exisiting one to show it is in multiple sub-categories
foreach (MFT_EnumFlag flagVal in Enum.GetValues(typeof(MFT_EnumFlag)))
{
// we do not need this one
if (flagVal == MFT_EnumFlag.None)
{
continue;
}
// The documentation states that there is no way to enumerate just local MFTs and nothing else.
// Setting Flags equal to MFT_ENUM_FLAG_LOCALMFT is equivalent to including the MFT_ENUM_FLAG_SYNCMFT flag
// which messes us up. This also appears to be true for the FieldOfUse and transcode only flags so we
// do not include them
if (flagVal == MFT_EnumFlag.LocalMFT)
{
continue;
}
if (flagVal == MFT_EnumFlag.FieldOfUse)
{
continue;
}
if (flagVal == MFT_EnumFlag.TranscodeOnly)
{
continue;
}
// some of the higher flags are just for sorting the return results
if (flagVal >= MFT_EnumFlag.All)
{
break;
}
hr = MFExtern.MFTEnumEx(currentCategory.GuidValue, flagVal, null, null, out activatorArray, out numResults);
if (hr != HResult.S_OK)
{
throw new Exception("DisplayTransformsForCurrentCategory, call to MFExtern.MFTEnumEx failed. HR=" + hr.ToString());
}
// now loop through the returned activators
for (int i = 0; i < numResults; i++)
{
// extract the friendlyName and symbolicLinkName
Guid outGuid = TantaWMFUtils.GetGuidForKeyFromActivator(activatorArray[i], MFAttributesClsid.MFT_TRANSFORM_CLSID_Attribute);
string friendlyName = TantaWMFUtils.GetStringForKeyFromActivator(activatorArray[i], MFAttributesClsid.MFT_FRIENDLY_NAME_Attribute);
// create a new TantaMFTCapabilityContainer for it
TantaMFTCapabilityContainer workingMFTContainer = new TantaMFTCapabilityContainer(friendlyName, outGuid, currentCategory);
// do we have this in our list yet
int index = transformList.FindIndex(x => x.TransformGuidValue == workingMFTContainer.TransformGuidValue);
if (index >= 0)
{
// yes, it does contain this transform, just record the new sub-category
transformList[index].EnumFlags |= flagVal;
}
else
{
// no, it does not contain this transform yet, set the sub-category
workingMFTContainer.EnumFlags = flagVal;
// and add it
transformList.Add(workingMFTContainer);
if ((activatorArray[i] is IMFAttributes) == true)
{
StringBuilder outSb = null;
List <string> attributesToIgnore = new List <string>();
attributesToIgnore.Add("MFT_FRIENDLY_NAME_Attribute");
attributesToIgnore.Add("MFT_TRANSFORM_CLSID_Attribute");
attributesToIgnore.Add("MF_TRANSFORM_FLAGS_Attribute");
attributesToIgnore.Add("MF_TRANSFORM_CATEGORY_Attribute");
hr = TantaWMFUtils.EnumerateAllAttributeNamesAsText((activatorArray[i] as IMFAttributes), attributesToIgnore, 100, out outSb);
}
}
// clean up our activator
Marshal.ReleaseComObject(activatorArray[i]);
}
}
// now display the transforms
foreach (TantaMFTCapabilityContainer mftCapability in transformList)
{
ListViewItem lvi = new ListViewItem(new[] { mftCapability.TransformFriendlyName, mftCapability.IsSyncMFT, mftCapability.IsAsyncMFT, mftCapability.IsHardware, /* mftCapability.IsFieldOfUse, mftCapability.IsLocalMFT, mftCapability.IsTranscodeOnly, */ mftCapability.TransformGuidValueAsString });
lvi.Tag = mftCapability;
listViewAvailableTransforms.Items.Add(lvi);
}
listViewAvailableTransforms.Columns.Add("Name", 250);
listViewAvailableTransforms.Columns.Add("IsSyncMFT", 70);
listViewAvailableTransforms.Columns.Add("IsAsyncMFT", 90);
listViewAvailableTransforms.Columns.Add("IsHardware", 90);
// listViewAvailableTransforms.Columns.Add("IsFieldOfUse", 90);
// listViewAvailableTransforms.Columns.Add("IsLocalMFT", 90);
// listViewAvailableTransforms.Columns.Add("IsTranscodeOnly", 90);
listViewAvailableTransforms.Columns.Add("Guid", 200);
}
finally
{
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Starts the process of recording. creates the sink writer. We do not
/// check to see if the filename is viable or already exists. This is
/// assumed to have been done before this call.
/// </summary>
/// <param name="outputFileName">the output file name</param>
/// <param name="incomingVideoMediaType">the incoming media type</param>
/// <param name="wantTimebaseRebaseIn">if true we rebase all incoming sample
/// times to zero from the point we started recording and send a copy of the
/// sample to the sink writer instead of the input sample</param>
/// <returns>z success, nz fail</returns>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public int StartRecording(string outputFileName, IMFMediaType incomingVideoMediaType, bool wantTimebaseRebaseIn)
{
HResult hr;
IMFMediaType encoderType = null;
LogMessage("MFTTantaSampleGrabber_Sync, StartRecording called");
// first stop any recordings now
StopRecording();
// check the output file name for sanity
if ((outputFileName == null) || (outputFileName.Length == 0))
{
LogMessage("StartRecording (outputFileName==null)|| (outputFileName.Length==0)");
return(100);
}
// check the media type for sanity
if (incomingVideoMediaType == null)
{
LogMessage("StartRecording videoMediaType == null");
return(150);
}
lock (sinkWriterLockObject)
{
// create the sink writer
workingSinkWriter = OpenSinkWriter(outputFileName, true);
if (workingSinkWriter == null)
{
LogMessage("StartRecording failed to create sink writer");
return(200);
}
// now configure the SinkWriter. This sets up the sink writer so that it knows what format
// the output data should be written in. The format we give the writer does not
// need to be the same as the format receives as input - however to make life easier for ourselves
// we will copy a lot of the settings from the videoType retrieved above
// create a new empty media type for us to populate
hr = MFExtern.MFCreateMediaType(out encoderType);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed on call to MFCreateMediaType, retVal=" + hr.ToString());
}
// The major type defines the overall category of the media data. Major types include video, audio, script & etc.
hr = encoderType.SetGUID(MFAttributesClsid.MF_MT_MAJOR_TYPE, MFMediaType.Video);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed setting the MF_MT_MAJOR_TYPE, retVal=" + hr.ToString());
}
// The subtype GUID defines a specific media format type within a major type. For example, within video,
// the subtypes include MFMediaType.H264 (MP4), MFMediaType.WMV3 (WMV), MJPEG & etc. Within audio, the
// subtypes include PCM audio, Windows Media Audio 9, & etc.
hr = encoderType.SetGUID(MFAttributesClsid.MF_MT_SUBTYPE, MEDIA_TYPETO_WRITE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed setting the MF_MT_SUBTYPE, retVal=" + hr.ToString());
}
// this is the approximate data rate of the video stream, in bits per second, for a
// video media type. The choice here is somewhat arbitrary but seems to work well.
hr = encoderType.SetUINT32(MFAttributesClsid.MF_MT_AVG_BITRATE, TARGET_BIT_RATE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed setting the MF_MT_AVG_BITRATE, retVal=" + hr.ToString());
}
// populate our new encoding type with the frame size of the videoType selected earlier
hr = TantaWMFUtils.CopyAttributeData(incomingVideoMediaType, encoderType, MFAttributesClsid.MF_MT_FRAME_SIZE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_FRAME_SIZE, retVal=" + hr.ToString());
}
// populate our new encoding type with the frame rate of the video type selected earlier
hr = TantaWMFUtils.CopyAttributeData(incomingVideoMediaType, encoderType, MFAttributesClsid.MF_MT_FRAME_RATE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_FRAME_RATE, retVal=" + hr.ToString());
}
// populate our new encoding type with the pixel aspect ratio of the video type selected earlier
hr = TantaWMFUtils.CopyAttributeData(incomingVideoMediaType, encoderType, MFAttributesClsid.MF_MT_PIXEL_ASPECT_RATIO);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_PIXEL_ASPECT_RATIO, retVal=" + hr.ToString());
}
// populate our new encoding type with the interlace mode of the video type selected earlier
hr = TantaWMFUtils.CopyAttributeData(incomingVideoMediaType, encoderType, MFAttributesClsid.MF_MT_INTERLACE_MODE);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("Failed copying the MF_MT_INTERLACE_MODE, retVal=" + hr.ToString());
}
// add a stream to the sink writer for the output Media type. The
// incomingVideoMediaType specifies the format of the samples that will
// be written to the file. Note that it does not necessarily need to
// match the input format.
hr = workingSinkWriter.AddStream(encoderType, out sinkWriterVideoStreamId);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("StartRecording Failed adding the output stream(v), retVal=" + hr.ToString());
}
// Windows 10, by default, provides an adequate set of codecs which the Sink Writer can
// find to write out the MP4 file. This is not true on Windows 7.
// If we are not on Windows 10 we register (locally) a codec
// the Sink Writer can find and use. The ColorConvertDMO is supplied by
// microsoft it is just not available to enumerate on Win7 etc.
// Making it available locally does not require administrator privs
// but only this process can see it and it disappears when the process
// closes
OperatingSystem os = Environment.OSVersion;
int versionID = ((os.Version.Major * 10) + os.Version.Minor);
if (versionID < 62)
{
Guid ColorConverterDMOGUID = new Guid("98230571-0087-4204-b020-3282538e57d3");
// Register the color converter DSP for this process, in the video
// processor category. This will enable the sink writer to enumerate
// the color converter when the sink writer attempts to match the
// media types.
hr = MFExtern.MFTRegisterLocalByCLSID(
ColorConverterDMOGUID,
MFTransformCategory.MFT_CATEGORY_VIDEO_PROCESSOR,
"",
MFT_EnumFlag.SyncMFT,
0,
null,
0,
null
);
}
// Set the input format for a stream on the sink writer. Note the use of the stream index here
// The input format does not have to match the target format that is written to the media sink
// If the formats do not match, this call attempts to load an transform
// that can convert from the input format to the target format. If it cannot find one, (and this is not
// a sure thing), it will throw an exception.
hr = workingSinkWriter.SetInputMediaType(sinkWriterVideoStreamId, incomingVideoMediaType, null);
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("StartRecording Failed on calling SetInputMediaType(v) on the writer, retVal=" + hr.ToString());
}
// set this flag now
wantTimebaseRebase = wantTimebaseRebaseIn;
// now we initialize the sink writer for writing. We call this method after configuring the
// input streams but before we send any data to the sink writer. The underlying media sink must
// have at least one input stream and we know it does because we set it up above
hr = workingSinkWriter.BeginWriting();
if (hr != HResult.S_OK)
{
// we failed
throw new Exception("StartRecording Failed on calling BeginWriting on the writer, retVal=" + hr.ToString());
}
}
return(0);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Gets a list of all supported video formats from a media type
/// as a nice displayable bit of text. outSb will never be null can be
/// empty.
///
/// Adapted from
/// https://msdn.microsoft.com/en-us/library/windows/desktop/ee663602(v=vs.85).aspx
/// </summary>
/// <returns>S_OK for success, nz for fail</returns>
/// <param name="mediaTypeObj">the media type object</param>
/// <param name="outSb">The output string</param>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public static HResult GetSupportedFormatsFromMediaTypeAsText(IMFMediaType mediaTypeObj, out StringBuilder outSb)
{
Guid majorType;
Guid subType;
int attributeCount;
int frameSizeWidth;
int frameSizeHeight;
int frameRate;
int frameRateDenominator;
int frameRateMin;
int frameRateMinDenominator;
int frameRateMax;
int frameRateMaxDenominator;
// we always return something here
outSb = new StringBuilder();
// sanity check
if (mediaTypeObj == null)
{
return(HResult.E_FAIL);
}
// Retrieves the number of attributes that are set on this object.
HResult hr = mediaTypeObj.GetCount(out attributeCount);
if (hr != HResult.S_OK)
{
// if we failed here, bail out
outSb.Append("failed getting attributeCount, retVal=" + hr.ToString());
outSb.Append("\r\n");
return(HResult.E_FAIL);
}
// put in this line now
// outSb.Append("attributeCount=" + attributeCount.ToString()+", ");
// MF_MT_MAJOR_TYPE
// Major type GUID, we return this as human readable text
hr = mediaTypeObj.GetMajorType(out majorType);
if (hr == HResult.S_OK)
{
// only report success
outSb.Append("MF_MT_MAJOR_TYPE=" + TantaWMFUtils.ConvertGuidToName(majorType) + ", ");
}
// MF_MT_SUBTYPE
// Subtype GUID which describes the basic media type, we return this as human readable text
hr = mediaTypeObj.GetGUID(MFAttributesClsid.MF_MT_SUBTYPE, out subType);
if (hr == HResult.S_OK)
{
// only report success
outSb.Append("MF_MT_SUBTYPE=" + TantaWMFUtils.ConvertGuidToName(subType) + ", ");
}
// MF_MT_FRAME_SIZE
// the Width and height of a video frame, in pixels
hr = MFExtern.MFGetAttributeSize(mediaTypeObj, MFAttributesClsid.MF_MT_FRAME_SIZE, out frameSizeWidth, out frameSizeHeight);
if (hr == HResult.S_OK)
{
// only report success
outSb.Append("MF_MT_FRAME_SIZE (W,H)=(" + frameSizeWidth.ToString() + "," + frameSizeHeight.ToString() + "), ");
}
// MF_MT_FRAME_RATE
// The frame rate is expressed as a ratio.The upper 32 bits of the attribute value contain the numerator and the lower 32 bits contain the denominator.
// For example, if the frame rate is 30 frames per second(fps), the ratio is 30 / 1.If the frame rate is 29.97 fps, the ratio is 30,000 / 1001.
// we report this back to the user as a decimal
hr = MFExtern.MFGetAttributeRatio(mediaTypeObj, MFAttributesClsid.MF_MT_FRAME_RATE, out frameRate, out frameRateDenominator);
if (hr == HResult.S_OK)
{
// only report success
if (frameRateDenominator < 0)
{
outSb.Append("MF_MT_FRAME_RATE (frames/s)=(undefined),");
}
else
{
outSb.Append("MF_MT_FRAME_RATE=" + ((decimal)frameRate / (decimal)frameRateDenominator).ToString() + "f/s, ");
}
}
// MF_MT_FRAME_RATE_RANGE_MIN
// The frame rate is expressed as a ratio.The upper 32 bits of the attribute value contain the numerator and the lower 32 bits contain the denominator.
// For example, if the frame rate is 30 frames per second(fps), the ratio is 30 / 1.If the frame rate is 29.97 fps, the ratio is 30,000 / 1001.
// we report this back to the user as a decimal
hr = MFExtern.MFGetAttributeRatio(mediaTypeObj, MFAttributesClsid.MF_MT_FRAME_RATE_RANGE_MIN, out frameRateMin, out frameRateMinDenominator);
if (hr == HResult.S_OK)
{
// only report success
if (frameRateMinDenominator < 0)
{
outSb.Append("MF_MT_FRAME_RATE_RANGE_MIN (frames/s)=(undefined),");
}
else
{
outSb.Append("MF_MT_FRAME_RATE_RANGE_MIN=" + ((decimal)frameRateMin / (decimal)frameRateMinDenominator).ToString() + "f/s, ");
}
}
// MF_MT_FRAME_RATE_RANGE_MAX
// The frame rate is expressed as a ratio.The upper 32 bits of the attribute value contain the numerator and the lower 32 bits contain the denominator.
// For example, if the frame rate is 30 frames per second(fps), the ratio is 30 / 1.If the frame rate is 29.97 fps, the ratio is 30,000 / 1001.
// we report this back to the user as a decimal
hr = MFExtern.MFGetAttributeRatio(mediaTypeObj, MFAttributesClsid.MF_MT_FRAME_RATE_RANGE_MAX, out frameRateMax, out frameRateMaxDenominator);
if (hr == HResult.S_OK)
{
// only report success
if (frameRateMaxDenominator < 0)
{
outSb.Append("MF_MT_FRAME_RATE_RANGE_MAX (frames/s)=(undefined),");
}
else
{
outSb.Append("MF_MT_FRAME_RATE_RANGE_MAX=" + ((decimal)frameRateMax / (decimal)frameRateMaxDenominator).ToString() + "f/s, ");
}
}
// enumerate all of the possible Attributes so we can see which ones are present that we did not report on
StringBuilder allAttrs = new StringBuilder();
hr = EnumerateAllAttributeNamesInMediaTypeAsText(mediaTypeObj, attributeCount, out allAttrs);
if (hr == HResult.S_OK)
{
outSb.Append("\r\n");
outSb.Append(" AllAttrs=" + allAttrs.ToString());
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Gets the playback rate capabilitys for the session
/// </summary>
/// <param name="mediaSession">the media session. If not null, we will
/// populate this object from the session</param>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
public bool AcquirePlayBackRates(IMFMediaSession mediaSession)
{
bool outBool;
bool wantThinned;
float supportedRate;
Reset();
if (mediaSession == null)
{
return(false);
}
try
{
// first we acquire the thinned rates
wantThinned = true;
outBool = TantaWMFUtils.GetFastestRate(mediaSession, MFRateDirection.Forward, wantThinned, out supportedRate);
if (outBool == true)
{
fastestForwardSpeedThinned = Math.Abs(supportedRate);
}
outBool = TantaWMFUtils.GetSlowestRate(mediaSession, MFRateDirection.Forward, wantThinned, out supportedRate);
if (outBool == true)
{
slowestForwardSpeedThinned = Math.Abs(supportedRate);
}
// now test for the reverse being possible with this thinning mode
outBool = TantaWMFUtils.IsRewindSupported(mediaSession, wantThinned);
if (outBool == true)
{
reverseSpeedIsSupportedThinned = true;
outBool = TantaWMFUtils.GetFastestRate(mediaSession, MFRateDirection.Reverse, wantThinned, out supportedRate);
if (outBool == true)
{
fastestReverseSpeedThinned = Math.Abs(supportedRate);
}
outBool = TantaWMFUtils.GetSlowestRate(mediaSession, MFRateDirection.Reverse, wantThinned, out supportedRate);
if (outBool == true)
{
slowestReverseSpeedThinned = Math.Abs(supportedRate);
}
}
// next we acquire the thinned rates
wantThinned = false;
outBool = TantaWMFUtils.GetFastestRate(mediaSession, MFRateDirection.Forward, wantThinned, out supportedRate);
if (outBool == true)
{
fastestForwardSpeedNonThinned = Math.Abs(supportedRate);
}
outBool = TantaWMFUtils.GetSlowestRate(mediaSession, MFRateDirection.Forward, wantThinned, out supportedRate);
if (outBool == true)
{
slowestForwardSpeedNonThinned = Math.Abs(supportedRate);
}
// now test for the reverse being possible with this thinning mode
outBool = TantaWMFUtils.IsRewindSupported(mediaSession, wantThinned);
if (outBool == true)
{
reverseSpeedIsSupportedNonThinned = true;
outBool = TantaWMFUtils.GetFastestRate(mediaSession, MFRateDirection.Reverse, wantThinned, out supportedRate);
if (outBool == true)
{
fastestReverseSpeedNonThinned = Math.Abs(supportedRate);
}
outBool = TantaWMFUtils.GetSlowestRate(mediaSession, MFRateDirection.Reverse, wantThinned, out supportedRate);
if (outBool == true)
{
slowestReverseSpeedNonThinned = Math.Abs(supportedRate);
}
}
capabilityRequestSuccessful = true;
}
catch
{
capabilityRequestSuccessful = false;
}
return(CapabilityRequestSuccessful);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// This is the routine that performs the transform. Unless the sinkWriter object
/// is set all we do is pass the sample on. If the sink writer object is set
/// we give the sample to it for writing. There are two modes - one where we just
/// give the sinkwriter the input sample and the other where we clone the input
/// sample and rebase the timestamps.
///
/// An override of the abstract version in TantaMFTBase_Sync.
/// </summary>
/// <param name="pOutputSamples">The structure to populate with output values.</param>
/// <returns>S_Ok unless error.</returns>
/// <history>
/// 01 Nov 18 Cynic - Originally written
/// </history>
protected override HResult OnProcessOutput(ref MFTOutputDataBuffer outputSampleDataStruct)
{
HResult hr = HResult.S_OK;
IMFMediaBuffer inputMediaBuffer = null;
IMFSample sinkWriterSample = null;
IMFAttributes sampleAttributes = null;
long sampleDuration = 0;
int sampleSize = 0;
long sampleTimeStamp = 0;
int sampleFlags = 0;
// in this MFT we are processing in place, the input sample is the output sample, the media buffer of the
// input sample is the media buffer of the output sample. Thats for the pipeline. If a sink writer exists
// we also write the sample data out to the sink writer. This provides the effect of displaying on the
// screen and simultaneously recording.
// There are two ways the sink writer can be given the media sample data. It can just be given the
// input sample directly or a copy of the sample can be made and that copy given to the sink writer.
// There is also an additional complication - the sample has a timestamp and video cameras tend
// to just use the current date and time as a timestamp. There are several reports that MP4 files
// need to have their first frame starting at zero and then every subsequent frame adjusted to that
// new base time. Certainly the Microsoft supplied example code (and see the
// TantaCaptureToFileViaReaderWriter also) take great care to do this. This requirement does not
// seem to exist - my tests indicate it is not necessary to start from 0 in the mp4 file. Maybe the
// Sink Writer has been improved and now does this automatically. For demonstration purposes
// the timebase-rebase functionality has been included and choosing that mode copies the sample
// and resets the time. If the user does not rebase the time we simply send the input sample
// to the Sink Writer as-is.
try
{
// Set status flags.
outputSampleDataStruct.dwStatus = MFTOutputDataBufferFlags.None;
// The output sample is the input sample. We get a new IUnknown for the Input
// sample since we are going to release it below. The client will release this
// new IUnknown
outputSampleDataStruct.pSample = Marshal.GetIUnknownForObject(InputSample);
// are we recording?
if (workingSinkWriter != null)
{
// we do everything in a lock
lock (sinkWriterLockObject)
{
// are we in timebase rebase mode?
if (wantTimebaseRebase == false)
{
// we are not. Just give the input sample to the Sink Writer which will
// write it out.
hr = workingSinkWriter.WriteSample(sinkWriterVideoStreamId, InputSample);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to WriteSample(a) failed. Err=" + hr.ToString());
}
}
else
{
// the timebase rebase option has been chosen. We need to create a copy of the input sample
// so we can adjust the time on it.
// Get the data buffer from the input sample. If the sample contains more than one buffer,
// this method copies the data from the original buffers into a new buffer, and replaces
// the original buffer list with the new buffer. The new buffer is returned in the inputMediaBuffer parameter.
// If the sample contains a single buffer, this method returns a pointer to the original buffer.
// In typical use, most samples do not contain multiple buffers.
hr = InputSample.ConvertToContiguousBuffer(out inputMediaBuffer);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.ConvertToContiguousBuffer failed. Err=" + hr.ToString());
}
// get some other things from the input sample
hr = InputSample.GetSampleDuration(out sampleDuration);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.GetSampleDuration failed. Err=" + hr.ToString());
}
hr = InputSample.GetTotalLength(out sampleSize);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.GetTotalLength failed. Err=" + hr.ToString());
}
hr = InputSample.GetSampleTime(out sampleTimeStamp);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.GetSampleTime failed. Err=" + hr.ToString());
}
// get the attributes from the input sample
if (InputSample is IMFAttributes)
{
sampleAttributes = (InputSample as IMFAttributes);
}
else
{
sampleAttributes = null;
}
// we have all the information we need to create a new output sample
sinkWriterSample = TantaWMFUtils.CreateMediaSampleFromBuffer(sampleFlags, sampleTimeStamp, sampleDuration, inputMediaBuffer, sampleSize, sampleAttributes);
if (sinkWriterSample == null)
{
throw new Exception("OnProcessOutput, Error on call to CreateMediaSampleFromBuffer sinkWriterSample == null");
}
// we have a sample, if so is it the first non null one?
if (isFirstSample)
{
// yes it is set up our timestamp
firstSampleBaseTime = sampleTimeStamp;
isFirstSample = false;
}
// rebase the time stamp
sampleTimeStamp -= firstSampleBaseTime;
hr = sinkWriterSample.SetSampleTime(sampleTimeStamp);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.SetSampleTime failed. Err=" + hr.ToString());
}
// write the sample out
hr = workingSinkWriter.WriteSample(sinkWriterVideoStreamId, sinkWriterSample);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to WriteSample(b) failed. Err=" + hr.ToString());
}
}
}
}
}
finally
{
// clean up
if (inputMediaBuffer != null)
{
Marshal.ReleaseComObject(inputMediaBuffer);
inputMediaBuffer = null;
}
if (sinkWriterSample != null)
{
Marshal.ReleaseComObject(sinkWriterSample);
sinkWriterSample = null;
}
// Release the current input sample so we can get another one.
// the act of setting it to null releases it because the property
// is coded that way
InputSample = null;
}
return(HResult.S_OK);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Sets the transform information panel on the control
/// </summary>
/// <param name="transformToDisplay">the transform to display</param>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
private void SetTransformInfoPanel(TantaMFTCapabilityContainer transformToDisplay)
{
List <IMFMediaType> outputTypes = null;
List <IMFMediaType> inputTypes = null;
StringBuilder displaySb = new StringBuilder();
StringBuilder outputSb = new StringBuilder();
StringBuilder inputSb = new StringBuilder();
StringBuilder headerSb = new StringBuilder();
StringBuilder outSb;
HResult hr;
// clear it down
ClearTransformInfoPanel();
if (transformToDisplay == null)
{
return;
}
// set up our header information
headerSb.Append(transformToDisplay.TransformFriendlyName);
headerSb.Append("\r\n");
headerSb.Append(transformToDisplay.TransformGuidValueAsString);
headerSb.Append("\r\n");
if (transformToDisplay.IsAsyncMFT == "x")
{
headerSb.Append("IsAsyncMFT" + ", ");
}
if (transformToDisplay.IsSyncMFT == "x")
{
headerSb.Append("IsSyncMFT" + ", ");
}
if (transformToDisplay.IsFieldOfUse == "x")
{
headerSb.Append("IsFieldOfUse" + ", ");
}
// we do not include these, the enum function does not give us this
// if (transformToDisplay.IsHardware == "x") headerSb.Append("IsHardware" + ", ");
// if (transformToDisplay.IsLocalMFT == "x") headerSb.Append("IsLocalMFT" + ", ");
// if (transformToDisplay.IsTranscodeOnly == "x") headerSb.Append("IsTranscodeOnly" + ", ");
headerSb.Append("\r\n");
try
{
// populate the RichText box with the input media type capabilities
inputTypes = TantaWMFUtils.GetInputMediaTypesFromTransformByGuid(transformToDisplay.TransformGuidValue, false);
// do we have any input types?
if ((inputTypes != null) && (inputTypes.Count != 0))
{
// go through the types
foreach (IMFMediaType mediaType in inputTypes)
{
// the major media type
hr = TantaMediaTypeInfo.GetMediaMajorTypeAsText(mediaType, out outSb);
if (hr != HResult.S_OK)
{
continue;
}
if (outSb == null)
{
continue;
}
inputSb.Append(outSb);
inputSb.Append("\r\n");
// the sub media type
hr = TantaMediaTypeInfo.GetMediaSubTypeAsText(mediaType, out outSb);
if (hr != HResult.S_OK)
{
continue;
}
if (outSb == null)
{
continue;
}
inputSb.Append(outSb);
inputSb.Append("\r\n");
// enumerate all of the possible Attributes so we can see which ones are present that we did not report on
StringBuilder allAttrs = new StringBuilder();
hr = TantaMediaTypeInfo.EnumerateAllAttributeNamesInMediaTypeAsText(mediaType, true, true, TantaWMFUtils.MAX_TYPES_TESTED_PER_TRANSFORM, out allAttrs);
if (hr != HResult.S_OK)
{
continue;
}
char[] charsToTrim = { ',', '.', ' ' };
inputSb.Append("OtherAttrs=" + allAttrs.ToString().TrimEnd(charsToTrim));
inputSb.Append("\r\n");
inputSb.Append("\r\n");
}
}
}
finally
{
// release the list of media type objects
if ((inputTypes != null) && (inputTypes.Count != 0))
{
foreach (IMFMediaType mediaType in inputTypes)
{
Marshal.ReleaseComObject(mediaType);
}
}
}
try
{
// populate the RichText box with the output media type capabilities
outputTypes = TantaWMFUtils.GetOutputMediaTypesFromTransformByGuid(transformToDisplay.TransformGuidValue, false);
// do we have any output types?
if ((outputTypes != null) && (outputTypes.Count != 0))
{
// go through the types
foreach (IMFMediaType mediaType in outputTypes)
{
// the major media type
hr = TantaMediaTypeInfo.GetMediaMajorTypeAsText(mediaType, out outSb);
if (hr != HResult.S_OK)
{
continue;
}
if (outSb == null)
{
continue;
}
outputSb.Append(outSb);
outputSb.Append("\r\n");
// the sub media type
hr = TantaMediaTypeInfo.GetMediaSubTypeAsText(mediaType, out outSb);
if (hr != HResult.S_OK)
{
continue;
}
if (outSb == null)
{
continue;
}
outputSb.Append(outSb);
outputSb.Append("\r\n");
// enumerate all of the possible Attributes so we can see which ones are present that we did not report on
StringBuilder allAttrs = new StringBuilder();
hr = TantaMediaTypeInfo.EnumerateAllAttributeNamesInMediaTypeAsText(mediaType, true, true, TantaWMFUtils.MAX_TYPES_TESTED_PER_TRANSFORM, out allAttrs);
if (hr != HResult.S_OK)
{
continue;
}
char[] charsToTrim = { ',', '.', ' ' };
outputSb.Append("OtherAttrs=" + allAttrs.ToString().TrimEnd(charsToTrim));
outputSb.Append("\r\n");
outputSb.Append("\r\n");
}
}
}
finally
{
// release the list of media type objects
if ((outputTypes != null) && (outputTypes.Count != 0))
{
foreach (IMFMediaType mediaType in outputTypes)
{
Marshal.ReleaseComObject(mediaType);
}
}
}
// display what we have
displaySb.Append(headerSb);
displaySb.Append("\r\n");
displaySb.Append("\r\n");
displaySb.Append("####\r\n");
displaySb.Append("#### INPUT TYPES\r\n");
displaySb.Append("####\r\n");
displaySb.Append("\r\n");
if (inputSb.Length > 0)
{
displaySb.Append(inputSb);
}
else
{
displaySb.Append("<not known>");
displaySb.Append("\r\n");
}
displaySb.Append("\r\n");
displaySb.Append("####\r\n");
displaySb.Append("#### OUTPUT TYPES\r\n");
displaySb.Append("####\r\n");
displaySb.Append("\r\n");
if (outputSb.Length > 0)
{
displaySb.Append(outputSb);
}
else
{
displaySb.Append("<not known>");
displaySb.Append("\r\n");
}
displaySb.Append("\r\n");
richTextBoxtTransformDetails.Text = displaySb.ToString();
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// Displays the video formats for the currently selected video device. This
/// is more complicated than it looks. We have to open the video source, convert
/// that to a Media Source and then interrogate the that source to find a list
/// of video formats.
///
/// NOTE: this function will throw exceptions - caller must trap them
/// </summary>
/// <history>
/// 01 Nov 18 Cynic - Started
/// </history>
private void DisplayVideoFormatsForCurrentCaptureDevice()
{
IMFPresentationDescriptor sourcePresentationDescriptor = null;
int sourceStreamCount = 0;
bool streamIsSelected = false;
IMFStreamDescriptor videoStreamDescriptor = null;
IMFMediaTypeHandler typeHandler = null;
int mediaTypeCount = 0;
List <TantaMFVideoFormatContainer> formatList = new List <TantaMFVideoFormatContainer>();
HResult hr;
IMFMediaSource mediaSource = null;
try
{
// clear what we have now
listViewSupportedFormats.Clear();
// reset this
listViewSupportedFormats.ListViewItemSorter = null;
// get the currently selected device
TantaMFDevice currentDevice = (TantaMFDevice)comboBoxCaptureDevices.SelectedItem;
if (currentDevice == null)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice currentDevice == null");
}
// use the device symbolic name to create the media source for the video 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.GetMediaSourceFromTantaDevice(currentDevice);
if (mediaSource == null)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to mediaSource == null");
}
// A presentation is a set of related media streams that share a common presentation time.
// we don't need that functionality in this app but we do need to presentation descriptor
// to find out the stream descriptors, these will give us the media types on offer
hr = mediaSource.CreatePresentationDescriptor(out sourcePresentationDescriptor);
if (hr != HResult.S_OK)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to mediaSource.CreatePresentationDescriptor failed. Err=" + hr.ToString());
}
if (sourcePresentationDescriptor == null)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice 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.
hr = sourcePresentationDescriptor.GetStreamDescriptorCount(out sourceStreamCount);
if (hr != HResult.S_OK)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to sourcePresentationDescriptor.GetStreamDescriptorCount failed. Err=" + hr.ToString());
}
if (sourceStreamCount == 0)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to sourcePresentationDescriptor.GetStreamDescriptorCount failed. sourceStreamCount == 0");
}
// look for the video stream
for (int i = 0; i < sourceStreamCount; i++)
{
// we require the major type to be video
Guid guidMajorType = TantaWMFUtils.GetMajorMediaTypeFromPresentationDescriptor(sourcePresentationDescriptor, i);
if (guidMajorType != MFMediaType.Video)
{
continue;
}
// we also require the stream to be enabled
hr = sourcePresentationDescriptor.GetStreamDescriptorByIndex(i, out streamIsSelected, out videoStreamDescriptor);
if (hr != HResult.S_OK)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to sourcePresentationDescriptor.GetStreamDescriptorByIndex(v) failed. Err=" + hr.ToString());
}
if (videoStreamDescriptor == null)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to sourcePresentationDescriptor.GetStreamDescriptorByIndex(v) failed. videoStreamDescriptor == null");
}
// if the stream is not selected (enabled) look for the next
if (streamIsSelected == false)
{
Marshal.ReleaseComObject(videoStreamDescriptor);
videoStreamDescriptor = null;
continue;
}
// Get the media type handler for the stream. IMFMediaTypeHandler
// interface is a standard way of looking at the media types on an stream
hr = videoStreamDescriptor.GetMediaTypeHandler(out typeHandler);
if (hr != HResult.S_OK)
{
throw new Exception("call to videoStreamDescriptor.GetMediaTypeHandler failed. Err=" + hr.ToString());
}
if (typeHandler == null)
{
throw new Exception("call to videoStreamDescriptor.GetMediaTypeHandler failed. typeHandler == null");
}
// Now we get the number of media types in the stream descriptor.
hr = typeHandler.GetMediaTypeCount(out mediaTypeCount);
if (hr != HResult.S_OK)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to typeHandler.GetMediaTypeCount failed. Err=" + hr.ToString());
}
if (mediaTypeCount == 0)
{
throw new Exception("DisplayVideoFormatsForCurrentCaptureDevice call to typeHandler.GetMediaTypeCount failed. mediaTypeCount == 0");
}
// now loop through each media type
for (int mediaTypeId = 0; mediaTypeId < mediaTypeCount; mediaTypeId++)
{
// Now we have the handler, get the media type.
IMFMediaType workingMediaType = null;
hr = typeHandler.GetMediaTypeByIndex(mediaTypeId, out workingMediaType);
if (hr != HResult.S_OK)
{
throw new Exception("GetMediaTypeFromStreamDescriptorById call to typeHandler.GetMediaTypeByIndex failed. Err=" + hr.ToString());
}
if (workingMediaType == null)
{
throw new Exception("GetMediaTypeFromStreamDescriptorById call to typeHandler.GetMediaTypeByIndex failed. workingMediaType == null");
}
TantaMFVideoFormatContainer tmpContainer = TantaMediaTypeInfo.GetVideoFormatContainerFromMediaTypeObject(workingMediaType, currentDevice);
if (tmpContainer == null)
{
// we failed
throw new Exception("GetSupportedVideoFormatsFromSourceReaderInFormatContainers failed on call to GetVideoFormatContainerFromMediaTypeObject");
}
// now add it
formatList.Add(tmpContainer);
Marshal.ReleaseComObject(workingMediaType);
workingMediaType = null;
}
// NOTE: we only do the first enabled video stream we find.
// it is possible to have more but our control
// cannot cope with that
break;
}
// now display the formats
foreach (TantaMFVideoFormatContainer videoFormat in formatList)
{
ListViewItem lvi = new ListViewItem(new[] { videoFormat.SubTypeAsString, videoFormat.FrameSizeAsString, videoFormat.FrameRateAsString, videoFormat.FrameRateMaxAsString, videoFormat.AllAttributes });
lvi.Tag = videoFormat;
listViewSupportedFormats.Items.Add(lvi);
}
listViewSupportedFormats.Columns.Add("Type", 70);
listViewSupportedFormats.Columns.Add("FrameSize WxH", 100);
listViewSupportedFormats.Columns.Add("FrameRate f/s", 100);
listViewSupportedFormats.Columns.Add("FrameRateMax f/s", 100);
listViewSupportedFormats.Columns.Add("All Attributes", 2500);
}
finally
{
// close and release
if (mediaSource != null)
{
Marshal.ReleaseComObject(mediaSource);
mediaSource = null;
}
if (sourcePresentationDescriptor != null)
{
Marshal.ReleaseComObject(sourcePresentationDescriptor);
sourcePresentationDescriptor = null;
}
if (videoStreamDescriptor != null)
{
Marshal.ReleaseComObject(videoStreamDescriptor);
videoStreamDescriptor = null;
}
if (typeHandler != null)
{
Marshal.ReleaseComObject(typeHandler);
typeHandler = null;
}
}
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <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>
/// Given the input and output media buffers, do the transform.
/// </summary>
/// <param name="inputMediaBuffer">Input buffer</param>
/// <param name="outputMediaBuffer">Output buffer</param>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
private void ConvertMediaBufferToGrayscale(IMFMediaBuffer inputMediaBuffer, IMFMediaBuffer outputMediaBuffer)
{
IntPtr destRawDataPtr = IntPtr.Zero; // Destination buffer.
int destStride = 0; // Destination stride.
bool destIs2D = false;
IntPtr srcRawDataPtr = IntPtr.Zero; // Source buffer.
int srcStride; // Source stride.
bool srcIs2D = false;
if (TransformImageFunction == null)
{
throw new COMException("Transform type not set", (int)HResult.E_UNEXPECTED);
}
try
{
// Lock the output buffer. Use the IMF2DBuffer interface
// (if available) as it is faster
if ((outputMediaBuffer is IMF2DBuffer) == false)
{
// not an IMF2DBuffer - get the raw data from the IMFMediaBuffer
int maxLen = 0;
int currentLen = 0;
TantaWMFUtils.LockIMFMediaBufferAndGetRawData(outputMediaBuffer, out destRawDataPtr, out maxLen, out currentLen);
// the stride is always this. The Lock function does not return it
destStride = m_lStrideIfContiguous;
}
else
{
// we are an IMF2DBuffer, we get the stride here as well
TantaWMFUtils.LockIMF2DBufferAndGetRawData((outputMediaBuffer as IMF2DBuffer), out destRawDataPtr, out destStride);
destIs2D = true;
}
// Lock the input buffer. Use the IMF2DBuffer interface
// (if available) as it is faster
if ((inputMediaBuffer is IMF2DBuffer) == false)
{
// not an IMF2DBuffer - get the raw data from the IMFMediaBuffer
int maxLen = 0;
int currentLen = 0;
TantaWMFUtils.LockIMFMediaBufferAndGetRawData(inputMediaBuffer, out srcRawDataPtr, out maxLen, out currentLen);
// the stride is always this. The Lock function does not return it
srcStride = m_lStrideIfContiguous;
}
else
{
// we are an IMF2DBuffer, we get the stride here as well
TantaWMFUtils.LockIMF2DBufferAndGetRawData((inputMediaBuffer as IMF2DBuffer), out srcRawDataPtr, out srcStride);
srcIs2D = true;
}
// Invoke the image transform function.
TransformImageFunction(destRawDataPtr,
destStride,
srcRawDataPtr,
srcStride,
m_imageWidthInPixels,
m_imageHeightInPixels);
// Set the data size on the output buffer.
HResult hr = outputMediaBuffer.SetCurrentLength(m_cbImageSize);
if (hr != HResult.S_OK)
{
throw new Exception("ConvertMediaBufferToGrayscale call to outputMediaBuffer.SetCurrentLength failed. Err=" + hr.ToString());
}
}
finally
{
// we MUST unlock
if (destIs2D == false)
{
TantaWMFUtils.UnLockIMFMediaBuffer(outputMediaBuffer);
}
else
{
TantaWMFUtils.UnLockIMF2DBuffer((outputMediaBuffer as IMF2DBuffer));
}
if (srcIs2D == false)
{
TantaWMFUtils.UnLockIMFMediaBuffer(inputMediaBuffer);
}
else
{
TantaWMFUtils.UnLockIMF2DBuffer((inputMediaBuffer as IMF2DBuffer));
}
}
}
