public static IMFAttributes CreateAttributes(int initialSize)
{
IMFAttributes result;
MediaFoundationInterop.MFCreateAttributes(out result, initialSize);
return(result);
}
public static IMFMediaBuffer CreateMemoryBuffer(int bufferSize)
{
IMFMediaBuffer result;
MediaFoundationInterop.MFCreateMemoryBuffer(bufferSize, out result);
return(result);
}
public static IMFSample CreateSample()
{
IMFSample result;
MediaFoundationInterop.MFCreateSample(out result);
return(result);
}
public static IMFMediaType CreateMediaType()
{
IMFMediaType result;
MediaFoundationInterop.MFCreateMediaType(out result);
return(result);
}
public static IMFSourceReader CreateSourceReaderFromByteStream(IMFByteStream byteStream)
{
IMFSourceReader result;
MediaFoundationInterop.MFCreateSourceReaderFromByteStream(byteStream, null, out result);
return(result);
}
public static void Shutdown()
{
if (MediaFoundationApi.initialized)
{
MediaFoundationInterop.MFShutdown();
MediaFoundationApi.initialized = false;
}
}
public static IMFByteStream CreateByteStream(object stream)
{
if (stream is IStream)
{
IMFByteStream result;
MediaFoundationInterop.MFCreateMFByteStreamOnStream(stream as IStream, out result);
return(result);
}
throw new ArgumentException("Stream must be IStream in desktop apps");
}
public static void Startup()
{
if (!MediaFoundationApi.initialized)
{
int num = 2;
OperatingSystem oSVersion = Environment.OSVersion;
if (oSVersion.Version.Major == 6 && oSVersion.Version.Minor == 0)
{
num = 1;
}
MediaFoundationInterop.MFStartup(num << 16 | 112, 0);
MediaFoundationApi.initialized = true;
}
}
public static IMFMediaType CreateMediaTypeFromWaveFormat(WaveFormat waveFormat)
{
IMFMediaType iMFMediaType = MediaFoundationApi.CreateMediaType();
try
{
MediaFoundationInterop.MFInitMediaTypeFromWaveFormatEx(iMFMediaType, waveFormat, Marshal.SizeOf(waveFormat));
}
catch (Exception)
{
Marshal.ReleaseComObject(iMFMediaType);
throw;
}
return(iMFMediaType);
}
public static IEnumerable <IMFActivate> EnumerateTransforms(Guid category)
{
IntPtr intPtr;
int num;
MediaFoundationInterop.MFTEnumEx(category, _MFT_ENUM_FLAG.MFT_ENUM_FLAG_ALL, null, null, out intPtr, out num);
IMFActivate[] array = new IMFActivate[num];
for (int i = 0; i < num; i++)
{
IntPtr pUnk = Marshal.ReadIntPtr(new IntPtr(intPtr.ToInt64() + (long)(i * Marshal.SizeOf(intPtr))));
array[i] = (IMFActivate)Marshal.GetObjectForIUnknown(pUnk);
}
IMFActivate[] array2 = array;
for (int j = 0; j < array2.Length; j++)
{
IMFActivate iMFActivate = array2[j];
yield return(iMFActivate);
}
array2 = null;
Marshal.FreeCoTaskMem(intPtr);
yield break;
}
