public static CreateMemoryBuffer ( int bufferSize ) : IMFMediaBuffer | ||
bufferSize | int | Memory buffer size in bytes |
Résultat | IMFMediaBuffer |
// 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); }
private IMFSample ReadFromSource() { // we always read a full second int bytesRead = sourceProvider.Read(sourceBuffer, 0, sourceBuffer.Length); if (bytesRead == 0) { return(null); } var mediaBuffer = MediaFoundationApi.CreateMemoryBuffer(bytesRead); IntPtr pBuffer; int maxLength, currentLength; mediaBuffer.Lock(out pBuffer, out maxLength, out currentLength); Marshal.Copy(sourceBuffer, 0, pBuffer, bytesRead); mediaBuffer.Unlock(); mediaBuffer.SetCurrentLength(bytesRead); var sample = MediaFoundationApi.CreateSample(); sample.AddBuffer(mediaBuffer); // we'll set the time, I don't think it is needed for Resampler, but other MFTs might need it sample.SetSampleTime(inputPosition); long duration = BytesToNsPosition(bytesRead, sourceProvider.WaveFormat); sample.SetSampleDuration(duration); inputPosition += duration; Marshal.ReleaseComObject(mediaBuffer); return(sample); }
/// <summary> /// Attempts to read from the transform /// Some useful info here: /// http://msdn.microsoft.com/en-gb/library/windows/desktop/aa965264%28v=vs.85%29.aspx#process_data /// </summary> /// <returns></returns> private int ReadFromTransform() { var outputDataBuffer = new MFT_OUTPUT_DATA_BUFFER[1]; // we have to create our own for var sample = MediaFoundationApi.CreateSample(); var pBuffer = MediaFoundationApi.CreateMemoryBuffer(outputBuffer.Length); sample.AddBuffer(pBuffer); sample.SetSampleTime(outputPosition); // hopefully this is not needed outputDataBuffer[0].pSample = sample; _MFT_PROCESS_OUTPUT_STATUS status; var hr = transform.ProcessOutput(_MFT_PROCESS_OUTPUT_FLAGS.None, 1, outputDataBuffer, out status); if (hr == MediaFoundationErrors.MF_E_TRANSFORM_NEED_MORE_INPUT) { Marshal.ReleaseComObject(pBuffer); Marshal.ReleaseComObject(sample); // nothing to read return(0); } else if (hr != 0) { Marshal.ThrowExceptionForHR(hr); } IMFMediaBuffer outputMediaBuffer; outputDataBuffer[0].pSample.ConvertToContiguousBuffer(out outputMediaBuffer); IntPtr pOutputBuffer; int outputBufferLength; int maxSize; outputMediaBuffer.Lock(out pOutputBuffer, out maxSize, out outputBufferLength); outputBuffer = BufferHelpers.Ensure(outputBuffer, outputBufferLength); Marshal.Copy(pOutputBuffer, outputBuffer, 0, outputBufferLength); outputBufferOffset = 0; outputBufferCount = outputBufferLength; outputMediaBuffer.Unlock(); outputPosition += BytesToNsPosition(outputBufferCount, WaveFormat); // hopefully not needed Marshal.ReleaseComObject(pBuffer); sample.RemoveAllBuffers(); // needed to fix memory leak in some cases Marshal.ReleaseComObject(sample); Marshal.ReleaseComObject(outputMediaBuffer); return(outputBufferLength); }
/// <summary> /// Attempts to read from the transform /// Some useful info here: /// http://msdn.microsoft.com/en-gb/library/windows/desktop/aa965264%28v=vs.85%29.aspx#process_data /// </summary> /// <returns></returns> // Token: 0x06000A57 RID: 2647 RVA: 0x0001E078 File Offset: 0x0001C278 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); Marshal.ReleaseComObject(imfsample); Marshal.ReleaseComObject(imfmediaBuffer2); return(num3); }