| public static CreateMemoryBuffer ( int bufferSize ) : IMFMediaBuffer | ||
| bufferSize | int | Memory buffer size in bytes |
| 리턴 | 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);
}