/// <summary>
/// Initializes a new instance of the <see cref="MediaFoundationVideoReader"/> class.
/// </summary>
/// <param name="videoSource">The source video file.</param>
public MediaFoundationVideoReader(ResourceLink videoSource)
{
videoSource.EnsureNotNull(nameof(videoSource));
try
{
m_videoSource = videoSource;
// Create the source reader
using (MF.MediaAttributes mediaAttributes = new MF.MediaAttributes(1))
{
// We need the 'EnableVideoProcessing' attribute because of the RGB32 format
// see (lowest post): http://msdn.developer-works.com/article/11388495/How+to+use+SourceReader+(for+H.264+to+RGB+conversion)%3F
mediaAttributes.Set(MF.SourceReaderAttributeKeys.EnableVideoProcessing, 1);
mediaAttributes.Set(MF.SourceReaderAttributeKeys.DisableDxva, 1);
// Wrap the .net stream to a MF Bytestream
m_videoSourceStreamNet = m_videoSource.OpenInputStream();
m_videoSourceStream = new MF.ByteStream(m_videoSourceStreamNet);
try
{
using (MF.MediaAttributes byteStreamAttributes = m_videoSourceStream.QueryInterface <MF.MediaAttributes>())
{
byteStreamAttributes.Set(MF.ByteStreamAttributeKeys.OriginName, "Dummy." + videoSource.FileExtension);
}
}
catch (SharpDXException)
{
// The interface MF.MediaAttributes is not available on some platforms
// (occured during tests on Windows 7 without Platform Update)
}
// Create the sourcereader by custom native method (needed because of the ByteStream arg)
IntPtr sourceReaderPointer = IntPtr.Zero;
SharpDX.Result sdxResult = NativeMethods.MFCreateSourceReaderFromByteStream_Native(
m_videoSourceStream.NativePointer,
mediaAttributes.NativePointer,
out sourceReaderPointer);
sdxResult.CheckError();
m_sourceReader = new MF.SourceReader(sourceReaderPointer);
}
// Apply source configuration
using (MF.MediaType mediaType = new MF.MediaType())
{
mediaType.Set(MF.MediaTypeAttributeKeys.MajorType, MF.MediaTypeGuids.Video);
mediaType.Set(MF.MediaTypeAttributeKeys.Subtype, MF.VideoFormatGuids.Rgb32);
m_sourceReader.SetCurrentMediaType(
MF.SourceReaderIndex.FirstVideoStream,
mediaType);
m_sourceReader.SetStreamSelection(MF.SourceReaderIndex.FirstVideoStream, new SharpDX.Mathematics.Interop.RawBool(true));
}
// Read some information about the source
using (MF.MediaType mediaType = m_sourceReader.GetCurrentMediaType(MF.SourceReaderIndex.FirstVideoStream))
{
long frameSizeLong = mediaType.Get(MF.MediaTypeAttributeKeys.FrameSize);
m_frameSize = new Size2(MFHelper.GetValuesByMFEncodedInts(frameSizeLong));
}
// Get additional propertie3s
m_durationLong = m_sourceReader.GetPresentationAttribute(
MF.SourceReaderIndex.MediaSource, MF.PresentationDescriptionAttributeKeys.Duration);
m_characteristics = (MediaSourceCharacteristics_Internal)m_sourceReader.GetPresentationAttribute(
MF.SourceReaderIndex.MediaSource, MF.SourceReaderAttributeKeys.MediaSourceCharacteristics);
}
catch (Exception)
{
this.Dispose();
throw;
}
}
