// Token: 0x06000A59 RID: 2649 RVA: 0x0001E1A8 File Offset: 0x0001C3A8
private IMFSample ReadFromSource()
{
int num = this.sourceProvider.Read(this.sourceBuffer, 0, this.sourceBuffer.Length);
if (num == 0)
{
return(null);
}
IMFMediaBuffer imfmediaBuffer = MediaFoundationApi.CreateMemoryBuffer(num);
IntPtr destination;
int num2;
int num3;
imfmediaBuffer.Lock(out destination, out num2, out num3);
Marshal.Copy(this.sourceBuffer, 0, destination, num);
imfmediaBuffer.Unlock();
imfmediaBuffer.SetCurrentLength(num);
IMFSample imfsample = MediaFoundationApi.CreateSample();
imfsample.AddBuffer(imfmediaBuffer);
imfsample.SetSampleTime(this.inputPosition);
long num4 = MediaFoundationTransform.BytesToNsPosition(num, this.sourceProvider.WaveFormat);
imfsample.SetSampleDuration(num4);
this.inputPosition += num4;
Marshal.ReleaseComObject(imfmediaBuffer);
return(imfsample);
}
// Token: 0x06000945 RID: 2373 RVA: 0x0001B0A0 File Offset: 0x000192A0
private long ConvertOneBuffer(IMFSinkWriter writer, int streamIndex, IWaveProvider inputProvider, long position, byte[] managedBuffer)
{
long num = 0L;
IMFMediaBuffer imfmediaBuffer = MediaFoundationApi.CreateMemoryBuffer(managedBuffer.Length);
int count;
imfmediaBuffer.GetMaxLength(out count);
IMFSample imfsample = MediaFoundationApi.CreateSample();
imfsample.AddBuffer(imfmediaBuffer);
IntPtr destination;
int num2;
imfmediaBuffer.Lock(out destination, out count, out num2);
int num3 = inputProvider.Read(managedBuffer, 0, count);
if (num3 > 0)
{
num = MediaFoundationEncoder.BytesToNsPosition(num3, inputProvider.WaveFormat);
Marshal.Copy(managedBuffer, 0, destination, num3);
imfmediaBuffer.SetCurrentLength(num3);
imfmediaBuffer.Unlock();
imfsample.SetSampleTime(position);
imfsample.SetSampleDuration(num);
writer.WriteSample(streamIndex, imfsample);
}
else
{
imfmediaBuffer.Unlock();
}
Marshal.ReleaseComObject(imfsample);
Marshal.ReleaseComObject(imfmediaBuffer);
return(num);
}
/// <summary>
/// Sets the presentation time of the sample.
/// </summary>
/// <param name="sample">A valid IMFSample instance.</param>
/// <param name="sampleTime">The presentation time.</param>
/// <returns>If this function succeeds, it returns the S_OK member. Otherwise, it returns another HResult's member that describe the error.</returns>
public static HResult SetSampleTime(this IMFSample sample, TimeSpan sampleTime)
{
if (sample == null)
{
throw new ArgumentNullException("sample");
}
return(sample.SetSampleTime(sampleTime.Ticks));
}
private long ConvertOneBuffer(IMFSinkWriter writer, int streamIndex, IWaveProvider inputProvider, long position, byte[] managedBuffer, int seconds, ref bool flag)
{
long durationConverted = 0;
int maxLength;
IMFMediaBuffer buffer = MediaFoundationApi.CreateMemoryBuffer(managedBuffer.Length);
buffer.GetMaxLength(out maxLength);
IMFSample sample = MediaFoundationApi.CreateSample();
sample.AddBuffer(buffer);
IntPtr ptr;
int currentLength;
buffer.Lock(out ptr, out maxLength, out currentLength);
int oneLength = inputProvider.WaveFormat.AverageBytesPerSecond;
int read = 0;
if (flag)
{
for (int i = 0; i < seconds; i++)
{
read = inputProvider.Read(managedBuffer, 0, oneLength);
}
flag = false;
}
else
{
read = inputProvider.Read(managedBuffer, 0, oneLength);
}
if (read > 0)
{
durationConverted = BytesToNsPosition(read, inputProvider.WaveFormat);
Marshal.Copy(managedBuffer, 0, ptr, read);
buffer.SetCurrentLength(read);
buffer.Unlock();
sample.SetSampleTime(position);
sample.SetSampleDuration(durationConverted);
writer.WriteSample(streamIndex, sample);
//writer.Flush(streamIndex);
}
else
{
buffer.Unlock();
}
Marshal.ReleaseComObject(sample);
Marshal.ReleaseComObject(buffer);
return(durationConverted);
}
private void DuplicateSample(IMFSample pInSample, out IMFSample pOutSample)
{
MFError throwonhr;
int flags;
long lTime;
throwonhr = MFExtern.MFCreateSample(out pOutSample);
throwonhr = pInSample.CopyAllItems(pOutSample);
HResult hr = pInSample.GetSampleDuration(out lTime);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleDuration(lTime);
}
hr = pInSample.GetSampleTime(out lTime);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleTime(lTime);
}
hr = pInSample.GetSampleFlags(out flags);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleFlags(flags);
}
IMFMediaBuffer mb;
throwonhr = MFExtern.MFCreateMemoryBuffer(m_imageHeightInPixels * m_imageWidthInPixels * 4, out mb);
try
{
// Set the data size on the output buffer.
throwonhr = mb.SetCurrentLength(m_cbImageSizeOutput);
throwonhr = pOutSample.AddBuffer(mb);
}
finally
{
SafeRelease(mb);
}
}
protected override int OnFrame(IMFSample pSample, IMFMediaBuffer pBuffer, long llTimestamp, string ssFormat)
{
int hr;
if (IsCapturing())
{
if (BFirstSample)
{
LlBaseTime = llTimestamp;
BFirstSample = false;
}
// re-base the time stamp
llTimestamp -= LlBaseTime;
hr = pSample.SetSampleTime(llTimestamp);
//if (Succeeded(hr))
//{
// var displayTask = Task<int>.Factory.StartNew(() => Draw.DrawFrame(pBuffer));
// var recordTask = Task<int>.Factory.StartNew(() => PWriter.WriteSample(0, pSample));
// Task.WaitAll(displayTask, recordTask);
// hr = displayTask.Result;
// if (Succeeded(hr))
// hr = recordTask.Result;
//}
//Parallel.Invoke(()=>Draw.DrawFrame(pBuffer),()=> PWriter.WriteSample(0, pSample));
if (Succeeded(hr))
{
hr = Draw.DrawFrame(pBuffer, !string.IsNullOrEmpty(ssFormat), ssFormat);
}
if (Succeeded(hr))
{
hr = PWriter.WriteSample(0, pSample);
}
}
else
{
hr = Draw.DrawFrame(pBuffer, !string.IsNullOrEmpty(ssFormat), ssFormat);
}
return(hr);
}
private int ReadFromTransform()
{
MFT_OUTPUT_DATA_BUFFER[] array = new MFT_OUTPUT_DATA_BUFFER[1];
IMFSample iMFSample = MediaFoundationApi.CreateSample();
IMFMediaBuffer iMFMediaBuffer = MediaFoundationApi.CreateMemoryBuffer(this.outputBuffer.Length);
iMFSample.AddBuffer(iMFMediaBuffer);
iMFSample.SetSampleTime(this.outputPosition);
array[0].pSample = iMFSample;
_MFT_PROCESS_OUTPUT_STATUS mFT_PROCESS_OUTPUT_STATUS;
int num = this.transform.ProcessOutput(_MFT_PROCESS_OUTPUT_FLAGS.None, 1, array, out mFT_PROCESS_OUTPUT_STATUS);
if (num == -1072861838)
{
Marshal.ReleaseComObject(iMFMediaBuffer);
Marshal.ReleaseComObject(iMFSample);
return(0);
}
if (num != 0)
{
Marshal.ThrowExceptionForHR(num);
}
IMFMediaBuffer iMFMediaBuffer2;
array[0].pSample.ConvertToContiguousBuffer(out iMFMediaBuffer2);
IntPtr source;
int num2;
int num3;
iMFMediaBuffer2.Lock(out source, out num2, out num3);
this.outputBuffer = BufferHelpers.Ensure(this.outputBuffer, num3);
Marshal.Copy(source, this.outputBuffer, 0, num3);
this.outputBufferOffset = 0;
this.outputBufferCount = num3;
iMFMediaBuffer2.Unlock();
this.outputPosition += MediaFoundationTransform.BytesToNsPosition(this.outputBufferCount, this.WaveFormat);
Marshal.ReleaseComObject(iMFMediaBuffer);
iMFSample.RemoveAllBuffers();
Marshal.ReleaseComObject(iMFSample);
Marshal.ReleaseComObject(iMFMediaBuffer2);
return(num3);
}
private void SetSampleAttributes(StspSampleHeader sampleHeader, IMFSample sample)
{
ThrowIfError(sample.SetSampleTime(sampleHeader.ullTimestamp));
ThrowIfError(sample.SetSampleDuration(sampleHeader.ullDuration));
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_BottomFieldFirst, StspSampleFlags.StspSampleFlag_BottomFieldFirst);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_CleanPoint, StspSampleFlags.StspSampleFlag_CleanPoint);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_DerivedFromTopField, StspSampleFlags.StspSampleFlag_DerivedFromTopField);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_Discontinuity, StspSampleFlags.StspSampleFlag_Discontinuity);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_Interlaced, StspSampleFlags.StspSampleFlag_Interlaced);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_RepeatFirstField, StspSampleFlags.StspSampleFlag_RepeatFirstField);
SET_SAMPLE_ATTRIBUTE(sampleHeader, sample, MFSampleExtension_SingleField, StspSampleFlags.StspSampleFlag_SingleField);
/* show debug info...
* int cbTotalLen;
* sample.GetTotalLength(out cbTotalLen);
* var isKeyFrame = Convert.ToBoolean(sampleHeader.dwFlags & (int)StspSampleFlags.StspSampleFlag_CleanPoint);
* Debug.WriteLine($"{DateTime.Now.ToString()} Received sample {sampleHeader.ullTimestamp} Duration-{sampleHeader.ullDuration} Length-{cbTotalLen} " + (isKeyFrame ? "key frame" : ""));
*/
}
/// <summary>Generates the "tail" of the audio effect.</summary>
/// <param name="InputMessageNumber">Message number to use with OutputSample.</param>
/// <remarks>
/// Generates the "tail" of the audio effect. The tail is the portion
/// of the delay effect that is heard after the input stream ends.
///
/// To generate the tail, the client must drain the MFT by sending
/// the MFT_MESSAGE_COMMAND_DRAIN message and then call ProcessOutput
/// to get the tail samples.
/// </remarks>
private void ProcessEffectTail(int InputMessageNumber)
{
IMFMediaBuffer pOutputBuffer = null;
MFError throwonhr;
IntPtr pbOutputData = IntPtr.Zero; // Pointer to the memory in the output buffer.
int cbOutputLength = 0; // Size of the output buffer.
int cbBytesProcessed = 0; // How much data we processed.
IMFSample pOutSample = null;
// Allocate an output buffer.
throwonhr = MFExtern.MFCreateMemoryBuffer(m_cbTailSamples, out pOutputBuffer);
try
{
throwonhr = MFExtern.MFCreateSample(out pOutSample);
throwonhr = pOutSample.AddBuffer(pOutputBuffer);
// Lock the output buffer.
int cb;
throwonhr = pOutputBuffer.Lock(out pbOutputData, out cbOutputLength, out cb);
// Calculate how many audio samples we can process.
cbBytesProcessed = Math.Min(m_cbTailSamples, cbOutputLength);
// Round to the next lowest multiple of nBlockAlign.
cbBytesProcessed -= (cbBytesProcessed % m_Alignment);
// Fill the output buffer with silence, because we are also using it as the input buffer.
FillBufferWithSilence(pbOutputData, cbBytesProcessed);
// Process the data.
ProcessAudio(pbOutputData, pbOutputData, cbBytesProcessed / m_Alignment);
// Set the data length on the output buffer.
throwonhr = pOutputBuffer.SetCurrentLength(cbBytesProcessed);
if (m_rtTimestamp >= 0)
{
long hnsDuration = (cbBytesProcessed / m_AvgBytesPerSec) * UNITS;
// Set the time stamp and duration on the output sample.
throwonhr = pOutSample.SetSampleTime(m_rtTimestamp);
throwonhr = pOutSample.SetSampleDuration(hnsDuration);
}
// Done.
m_cbTailSamples = 0;
OutputSample(pOutSample, InputMessageNumber);
}
catch
{
SafeRelease(pOutSample);
throw;
}
finally
{
if (pbOutputData != IntPtr.Zero)
{
pOutputBuffer.Unlock();
}
SafeRelease(pOutputBuffer);
}
}
protected override int OnFrame(IMFSample pSample, IMFMediaBuffer pBuffer, long llTimestamp, string ssFormat)
{
int hr;
if (IsCapturing())
{
if (BFirstSample)
{
LlBaseTime = llTimestamp;
BFirstSample = false;
}
// re-base the time stamp
llTimestamp -= LlBaseTime;
hr = pSample.SetSampleTime(llTimestamp);
//if (Succeeded(hr))
//{
// var displayTask = Task<int>.Factory.StartNew(() => Draw.DrawFrame(pBuffer));
// var recordTask = Task<int>.Factory.StartNew(() => PWriter.WriteSample(0, pSample));
// Task.WaitAll(displayTask, recordTask);
// hr = displayTask.Result;
// if (Succeeded(hr))
// hr = recordTask.Result;
//}
//Parallel.Invoke(()=>Draw.DrawFrame(pBuffer),()=> PWriter.WriteSample(0, pSample));
if (Succeeded(hr))
hr = Draw.DrawFrame(pBuffer, !string.IsNullOrEmpty(ssFormat), ssFormat);
if (Succeeded(hr))
hr = PWriter.WriteSample(0, pSample);
}
else
hr = Draw.DrawFrame(pBuffer, !string.IsNullOrEmpty(ssFormat), ssFormat);
return hr;
}
/// <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 MFTBase_Sync.
/// </summary>
/// <param name="pOutputSamples">The structure to populate with output values.</param>
/// <returns>S_Ok unless error.</returns>
protected override HResult OnProcessOutput(ref MFTOutputDataBuffer outputSampleDataStruct)
{
HResult hr = HResult.S_OK;
IMFMediaBuffer inputMediaBuffer = null;
IMFSample sinkWriterSample = null;
IMFAttributes sampleAttributes;
// 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
// CaptureToFileViaReaderWriter 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 long sampleDuration);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.GetSampleDuration failed. Err=" + hr.ToString());
}
hr = InputSample.GetTotalLength(out int sampleSize);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.GetTotalLength failed. Err=" + hr.ToString());
}
hr = InputSample.GetSampleTime(out long 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 = WMFUtils.CreateMediaSampleFromBuffer(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);
}
if (sinkWriterSample != null)
{
Marshal.ReleaseComObject(sinkWriterSample);
}
// 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);
}
override protected HResult OnProcessOutput(ref MFTOutputDataBuffer pOutputSamples)
{
HResult hr = HResult.S_OK;
MFError throwonhr;
// Since we don't specify MFTOutputStreamInfoFlags.ProvidesSamples, this can't be null.
if (pOutputSamples.pSample != IntPtr.Zero)
{
long hnsDuration;
long hnsTime;
IMFMediaBuffer pInput = null;
IMFMediaBuffer pOutput = null;
IMFSample pOutSample = null;
try
{
// Get the data buffer from the input sample. If the sample has
// multiple buffers, you might be able to get (slightly) better
// performance processing each buffer in turn rather than forcing
// a new, full-sized buffer to get created.
throwonhr = InputSample.ConvertToContiguousBuffer(out pInput);
// Turn pointer to interface
pOutSample = Marshal.GetUniqueObjectForIUnknown(pOutputSamples.pSample) as IMFSample;
// Get the output buffer.
throwonhr = pOutSample.ConvertToContiguousBuffer(out pOutput);
OnProcessOutput(pInput, pOutput);
// Set status flags.
pOutputSamples.dwStatus = MFTOutputDataBufferFlags.None;
// Copy the duration and time stamp from the input sample,
// if present.
hr = InputSample.GetSampleDuration(out hnsDuration);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleDuration(hnsDuration);
}
hr = InputSample.GetSampleTime(out hnsTime);
if (Succeeded(hr))
{
throwonhr = pOutSample.SetSampleTime(hnsTime);
}
}
finally
{
SafeRelease(pInput);
SafeRelease(pOutput);
SafeRelease(pOutSample);
// Release the current input sample so we can get another one.
InputSample = null;
}
}
else
{
return(HResult.E_INVALIDARG);
}
return(HResult.S_OK);
}
public HResult OnReadSample(
HResult hrStatus,
int dwStreamIndex,
MF_SOURCE_READER_FLAG dwStreamFlags,
long llTimeStamp,
IMFSample pSample // Can be null
)
{
HResult hr = HResult.S_OK;
try
{
lock (this)
{
if (!IsCapturing())
{
return(HResult.S_OK);
}
if (Failed(hrStatus))
{
hr = hrStatus;
goto done;
}
if (pSample != null)
{
if (m_bFirstSample)
{
m_llBaseTime = llTimeStamp;
m_bFirstSample = false;
}
// rebase the time stamp
llTimeStamp -= m_llBaseTime;
hr = pSample.SetSampleTime(llTimeStamp);
if (Failed(hr))
{
goto done;
}
hr = m_pWriter.WriteSample(0, pSample);
if (Failed(hr))
{
goto done;
}
}
// Read another sample.
hr = m_pReader.ReadSample(
MF_SOURCE_READER_FIRST_VIDEO_STREAM,
0,
IntPtr.Zero, // actual
IntPtr.Zero, // flags
IntPtr.Zero, // timestamp
IntPtr.Zero // sample
);
done:
if (Failed(hr))
{
PostMessage(m_hwndEvent, m_iMessageID, new IntPtr((int)hr), IntPtr.Zero);
}
}
}
catch (Exception e)
{
hr = (HResult)Marshal.GetHRForException(e);
}
finally
{
SafeRelease(pSample);
}
return(hr);
}
private void SetSampleAttributes(StspSampleHeader sampleHeader, IMFSample sample)
{
ThrowIfError(sample.SetSampleTime(sampleHeader.ullTimestamp));
ThrowIfError(sample.SetSampleDuration(sampleHeader.ullDuration));
}
public int OnReadSample(
int hrStatus,
int dwStreamIndex,
MF_SOURCE_READER_FLAG dwStreamFlags,
long llTimeStamp,
IMFSample pSample // Can be null
)
{
int hr = S_Ok;
try
{
lock (this)
{
if (!IsCapturing())
{
return S_Ok;
}
if (Failed(hrStatus))
{
hr = hrStatus;
goto done;
}
if (pSample != null)
{
if (m_bFirstSample)
{
m_llBaseTime = llTimeStamp;
m_bFirstSample = false;
}
// rebase the time stamp
llTimeStamp -= m_llBaseTime;
hr = pSample.SetSampleTime(llTimeStamp);
if (Failed(hr)) { goto done; }
hr = m_pWriter.WriteSample(0, pSample);
if (Failed(hr)) { goto done; }
}
// Read another sample.
hr = m_pReader.ReadSample(
MF_SOURCE_READER_FIRST_VIDEO_STREAM,
0,
IntPtr.Zero, // actual
IntPtr.Zero, // flags
IntPtr.Zero, // timestamp
IntPtr.Zero // sample
);
done:
if (Failed(hr))
{
PostMessage(m_hwndEvent, m_iMessageID, new IntPtr(hr), IntPtr.Zero);
}
}
}
catch (Exception e)
{
hr = Marshal.GetHRForException(e);
}
finally
{
SafeRelease(pSample);
}
return hr;
}
// IMFSourceReaderCallback methods
//-------------------------------------------------------------------
// OnReadSample
//
// Called when the IMFMediaSource::ReadSample method completes.
//-------------------------------------------------------------------
public int OnReadSample(int hrStatus, int dwStreamIndex, MF_SOURCE_READER_FLAG dwStreamFlags, long llTimestamp, IMFSample pSample)
{
int hr = hrStatus;
IMFMediaBuffer pBuffer = null;
lock (this)
{
try
{
if (Succeeded(hr))
{
if (pSample != null)
{
// Get the video frame buffer from the sample.
hr = pSample.GetBufferByIndex(0, out pBuffer);
// Draw the frame.
if (Succeeded(hr))
{
hr = m_draw.DrawFrame(pBuffer);
}
if (Succeeded(hr))
{
if (m_bFirstSample)
{
m_llBaseTime = llTimestamp;
m_bFirstSample = false;
}
// rebase the time stamp
llTimestamp -= m_llBaseTime;
hr = pSample.SetSampleTime(llTimestamp);
if (Succeeded(hr))
{
hr = m_pWriter.WriteSample(0, pSample);
}
}
}
}
// Request the next frame.
if (Succeeded(hr))
{
// Ask for the first sample.
hr = m_pReader.ReadSample((int)MF_SOURCE_READER.FirstVideoStream, 0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
}
if (Failed(hr))
{
NotifyError(hr);
}
}
finally
{
//SafeRelease(pBuffer);
SafeRelease(pSample);
}
}
return hr;
}
// IMFSourceReaderCallback methods
//-------------------------------------------------------------------
// OnReadSample
//
// Called when the IMFMediaSource::ReadSample method completes.
//-------------------------------------------------------------------
public HResult OnReadSample(HResult hrStatus, int dwStreamIndex, MF_SOURCE_READER_FLAG dwStreamFlags, long llTimestamp, IMFSample pSample)
{
HResult hr = hrStatus;
IMFMediaBuffer pBuffer = null;
lock (this)
{
try
{
if (Succeeded(hr))
{
if (pSample != null)
{
// Get the video frame buffer from the sample.
hr = pSample.GetBufferByIndex(0, out pBuffer);
// Draw the frame.
if (Succeeded(hr))
{
hr = m_draw.DrawFrame(pBuffer);
}
if (Succeeded(hr))
{
if (m_bFirstSample)
{
m_llBaseTime = llTimestamp;
m_bFirstSample = false;
}
// rebase the time stamp
llTimestamp -= m_llBaseTime;
hr = pSample.SetSampleTime(llTimestamp);
if (Succeeded(hr))
{
hr = m_pWriter.WriteSample(0, pSample);
}
}
}
}
// Request the next frame.
if (Succeeded(hr))
{
// Ask for the first sample.
hr = m_pReader.ReadSample((int)MF_SOURCE_READER.FirstVideoStream, 0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
}
if (Failed(hr))
{
NotifyError(hr);
}
}
finally
{
//SafeRelease(pBuffer);
SafeRelease(pSample);
}
}
return(hr);
}
/// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
/// <summary>
/// This is the routine that performs the transform. Assumes InputSample is set.
///
/// An override of the abstract version in TantaMFTBase_Sync.
/// </summary>
/// <param name="outputSampleDataStruct">The structure to populate with output data.</param>
/// <returns>S_Ok unless error.</returns>
/// <history>
/// 01 Nov 18 Cynic - Ported In
/// </history>
protected override HResult OnProcessOutput(ref MFTOutputDataBuffer outputSampleDataStruct)
{
long hnsDuration;
long hnsTime;
HResult hr = HResult.S_OK;
IMFMediaBuffer inputMediaBuffer = null;
IMFMediaBuffer outputMediaBuffer = null;
IMFSample outputSample = null;
// Since we don't specify MFTOutputStreamInfoFlags.ProvidesSamples, this can't be null.
// we expect the caller to have allocated the memory for this
if (outputSampleDataStruct.pSample == IntPtr.Zero)
{
return(HResult.E_INVALIDARG);
}
try
{
// 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());
}
// Turn pointer into an interface. The GetUniqueObjectForIUnknown method ensures that we
// receive a unique Runtime Callable Wrapper, because it does not match an IUnknown pointer
// to an existing object. Use this method when you have to create a unique RCW that is not
// impacted by other code that calls the ReleaseComObject method.
outputSample = Marshal.GetUniqueObjectForIUnknown(outputSampleDataStruct.pSample) as IMFSample;
if (outputSample == null)
{
throw new Exception("OnProcessOutput call to GetUniqueObjectForIUnknown failed. outputSample == null");
}
// Now get the output buffer. A media sample contains zero or more buffers. Each buffer manages a block of
// memory, and is represented by the IMFMediaBuffer interface. A sample can have multiple buffers.
// The buffers are kept in an ordered list and accessed by index value. This call gets us a single
// pointer to a single contigous buffer which is much more useful.
hr = outputSample.ConvertToContiguousBuffer(out outputMediaBuffer);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to InputSample.ConvertToContiguousBuffer failed. Err=" + hr.ToString());
}
// now that we have an input and output buffer, do the work to convert them to grayscale.
// Writing into outputMediaBuffer will write to the approprate location in the outputSample
// since we took care to Marshal it that way
ConvertMediaBufferToGrayscale(inputMediaBuffer, outputMediaBuffer);
// Set status flags.
outputSampleDataStruct.dwStatus = MFTOutputDataBufferFlags.None;
// Copy the duration from the input sample, if present. The
// Media Session needs these in order to keep everything sync'ed
hr = InputSample.GetSampleDuration(out hnsDuration);
if (hr == HResult.S_OK)
{
hr = outputSample.SetSampleDuration(hnsDuration);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to OutSample.SetSampleDuration failed. Err=" + hr.ToString());
}
}
// Copy the time stamp from the input sample, if present.
hr = InputSample.GetSampleTime(out hnsTime);
if (hr == HResult.S_OK)
{
hr = outputSample.SetSampleTime(hnsTime);
if (hr != HResult.S_OK)
{
throw new Exception("OnProcessOutput call to OutSample.SetSampleTime failed. Err=" + hr.ToString());
}
}
}
finally
{
// clean up
SafeRelease(inputMediaBuffer);
SafeRelease(outputMediaBuffer);
SafeRelease(outputSample);
// 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);
}
