// Get the buffers and sizes to be modified, then pass them
// to the appropriate Update_* routine.
private void DoWork(IMFMediaBuffer pIn)
{
IntPtr pSrc = IntPtr.Zero; // Source buffer.
int lSrcStride; // Source stride.
IMF2DBuffer pIn2D = null;
try
{
// Lock the input buffer. Use IMF2DBuffer if available.
Lockit(pIn, out pIn2D, out lSrcStride, out pSrc);
// Invoke the image transform function.
if (m_pTransformFn != null)
{
m_pTransformFn(pSrc, lSrcStride,
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 = pIn.SetCurrentLength(m_cbImageSize);
}
finally
{
UnlockIt(pSrc, pIn2D, pIn);
}
}
// Get the buffers and sizes to be modified, then pass them
// to the transform routine.
private void DoWork(IMFMediaBuffer pIn, IMFMediaBuffer pOut)
{
IntPtr pSrc = IntPtr.Zero;
int lSrcStride = 0;
IMF2DBuffer pIn2D = null;
// Lock the input buffer. Use IMF2DBuffer if available.
Lockit(pIn, out pIn2D, out lSrcStride, out pSrc);
try
{
IntPtr pDest;
int mlo;
int cb;
MFError throwonhr = pOut.Lock(out pDest, out mlo, out cb);
try
{
// Invoke the image transform function.
YUY2_TO_RGB32(pSrc, pDest, m_imageWidthInPixels, m_imageHeightInPixels, lSrcStride);
}
finally
{
pOut.Unlock();
}
}
finally
{
// Ignore error
UnlockIt(pSrc, pIn2D, pIn);
}
}
// Constructor
public VideoBufferLock(IMFMediaBuffer pBuffer)
{
m_p2DBuffer = null;
m_bLocked = false;
m_pBuffer = pBuffer;
// Query for the 2-D buffer interface. OK if this fails.
m_p2DBuffer = pBuffer as IMF2DBuffer;
}
// Constructor
public VideoBufferLock(IMFMediaBuffer pBuffer)
{
m_p2DBuffer = null;
m_bLocked = false;
m_pBuffer = pBuffer;
// Query for the 2-D buffer interface. OK if this fails.
m_p2DBuffer = pBuffer as IMF2DBuffer;
}
// Constructor
public VideoBufferLock(IMFMediaBuffer pBuffer)
{
p2DBuffer = null;
bLocked = false;
this.pBuffer = pBuffer;
// Query for the 2-D buffer interface. OK if this fails.
// ReSharper disable once SuspiciousTypeConversion.Global
p2DBuffer = pBuffer as IMF2DBuffer;
}
public static uint GetContiguousLength(this IMF2DBuffer obj)
{
if (obj == null)
{
throw new ArgumentNullException(nameof(obj));
}
obj.GetContiguousLength(out var length).ThrowOnError();
return(length);
}
// Constructor
public VideoBufferLock(IMFMediaBuffer pBuffer)
{
p2DBuffer = null;
bLocked = false;
this.pBuffer = pBuffer;
// Query for the 2-D buffer interface. OK if this fails.
// ReSharper disable once SuspiciousTypeConversion.Global
p2DBuffer = pBuffer as IMF2DBuffer;
}
public void Dispose()
{
UnlockBuffer();
SafeRelease(pBuffer);
SafeRelease(p2DBuffer);
pBuffer = null;
p2DBuffer = null;
GC.SuppressFinalize(this);
}
public void Dispose()
{
UnlockBuffer();
SafeRelease(pBuffer);
SafeRelease(p2DBuffer);
pBuffer = null;
p2DBuffer = null;
GC.SuppressFinalize(this);
}
/// <summary>
/// Copies data to this buffer from a MemoryBuffer that has a contiguous format.
/// </summary>
/// <param name="value">A valid IMF2DBuffer instance.</param>
/// <param name="sourceBuffer">A MemoryBuffer.</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 ContiguousCopyFrom(this IMF2DBuffer buffer, MemoryBuffer sourceBuffer)
{
if (buffer == null)
{
throw new ArgumentNullException("value");
}
if (sourceBuffer == null)
{
throw new ArgumentNullException("sourceBuffer");
}
return(buffer.ContiguousCopyFrom(sourceBuffer.BufferPointer, (int)sourceBuffer.ByteLength));
}
/// <summary>
/// Copies this buffer into a MemoryBuffer, converting the data to contiguous format.
/// </summary>
/// <param name="value">A valid IMF2DBuffer instance.</param>
/// <param name="destinationBuffer">The destination MemoryBuffer.</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 ContiguousCopyTo(this IMF2DBuffer buffer, MemoryBuffer destinationBuffer)
{
if (buffer == null)
{
throw new ArgumentNullException("value");
}
if (destinationBuffer == null)
{
throw new ArgumentNullException("destinationBuffer");
}
return(buffer.ContiguousCopyTo(destinationBuffer.BufferPointer, (int)destinationBuffer.ByteLength));
}
private static void UnlockIt(IntPtr pSrc, IMF2DBuffer pIn2D, IMFMediaBuffer pIn)
{
if (pSrc != IntPtr.Zero)
{
MFError throwonhr;
if (pIn2D != null)
{
throwonhr = pIn2D.Unlock2D();
}
else
{
throwonhr = pIn.Unlock();
}
}
}
private void Lockit(IMFMediaBuffer pOut, out IMF2DBuffer pOut2D, out int lDestStride, out IntPtr pDest)
{
MFError throwonhr;
pOut2D = pOut as IMF2DBuffer;
if (pOut2D != null)
{
throwonhr = pOut2D.Lock2D(out pDest, out lDestStride);
}
else
{
int ml;
int cb;
throwonhr = pOut.Lock(out pDest, out ml, out cb);
lDestStride = m_lStrideIfContiguous;
}
}
/// <summary>
/// Copies this buffer into a byte array, converting the data to contiguous format.
/// </summary>
/// <param name="value">A valid IMF2DBuffer instance.</param>
/// <param name="destinationBuffer">The destination byte array.</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 ContiguousCopyTo(this IMF2DBuffer buffer, byte[] destinationBuffer)
{
if (buffer == null)
{
throw new ArgumentNullException("value");
}
if (destinationBuffer == null)
{
throw new ArgumentNullException("destinationBuffer");
}
using (GCPin pinnedArray = new GCPin(destinationBuffer))
{
return(buffer.ContiguousCopyFrom(pinnedArray.PinnedAddress, destinationBuffer.Length));
}
}
// Get the buffers and sizes to be modified, then pass them
// to the textwrite routine.
private void DoWork(IMFMediaBuffer pIn)
{
IntPtr pSrc = IntPtr.Zero; // Source buffer.
int lSrcStride; // Source stride.
IMF2DBuffer pIn2D = null;
// Lock the input buffer. Use IMF2DBuffer if available.
Lockit(pIn, out pIn2D, out lSrcStride, out pSrc);
try
{
WriteIt(pSrc);
}
finally
{
UnlockIt(pSrc, pIn2D, pIn);
}
}
/// <summary>
/// Copies data to this buffer from a byte array segment that has a contiguous format.
/// </summary>
/// <param name="value">A valid IMF2DBuffer instance.</param>
/// <param name="sourceBuffer">A byte array segment.</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 ContiguousCopyFrom(this IMF2DBuffer buffer, ArraySegment <byte> sourceBuffer)
{
if (buffer == null)
{
throw new ArgumentNullException("value");
}
if (sourceBuffer.Array == null)
{
throw new ArgumentNullException("sourceBuffer.Array");
}
using (GCPin pinnedArray = new GCPin(sourceBuffer.Array))
{
IntPtr startAddress = pinnedArray.PinnedAddress + sourceBuffer.Offset;
return(buffer.ContiguousCopyFrom(startAddress, sourceBuffer.Count));
}
}
