public VTStatus DecodeFrame(CMSampleBuffer sampleBuffer, VTDecodeFrameFlags decodeFlags,
out VTDecodeInfoFlags infoFlags, VTDecompressionOutputHandler outputHandler)
{
if (Handle == IntPtr.Zero)
{
throw new ObjectDisposedException("DecompressionSession");
}
if (sampleBuffer == null)
{
throw new ArgumentNullException("sampleBuffer");
}
if (outputHandler == null)
{
throw new ArgumentNullException("outputHandler");
}
unsafe {
var block = new BlockLiteral();
var blockPtr = █
block.SetupBlockUnsafe(decompressionOutputHandlerTrampoline, outputHandler);
try {
return(VTDecompressionSessionDecodeFrameWithOutputHandler(Handle,
sampleBuffer.Handle, decodeFlags, out infoFlags, blockPtr));
} finally {
blockPtr->CleanupBlock();
}
}
}
void ReadSampleBuffers(AVAsset asset)
{
NSError error;
assetReader = AVAssetReader.FromAsset(asset, out error);
if (error != null)
{
Console.WriteLine("Error creating Asset Reader: {0}", error.Description);
}
AVAssetTrack[] videoTracks = asset.TracksWithMediaType(AVMediaType.Video);
AVAssetTrack videoTrack = videoTracks [0];
CreateDecompressionSession(videoTrack);
var videoTrackOutput = AVAssetReaderTrackOutput.Create(videoTrack, (AVVideoSettingsUncompressed)null);
if (assetReader.CanAddOutput(videoTrackOutput))
{
assetReader.AddOutput(videoTrackOutput);
}
if (!assetReader.StartReading())
{
return;
}
while (assetReader.Status == AVAssetReaderStatus.Reading)
{
CMSampleBuffer sampleBuffer = videoTrackOutput.CopyNextSampleBuffer();
if (sampleBuffer != null)
{
VTDecodeFrameFlags flags = VTDecodeFrameFlags.EnableAsynchronousDecompression;
VTDecodeInfoFlags flagOut;
decompressionSession.DecodeFrame(sampleBuffer, flags, IntPtr.Zero, out flagOut);
sampleBuffer.Dispose();
if (presentationTimes.Count >= 5)
{
bufferSemaphore.Wait();
}
}
else if (assetReader.Status == AVAssetReaderStatus.Failed)
{
Console.WriteLine("Asset Reader failed with error: {0}", assetReader.Error.Description);
}
else if (assetReader.Status == AVAssetReaderStatus.Completed)
{
Console.WriteLine("Reached the end of the video.");
ChangeStatus();
ReadSampleBuffers(asset);
}
}
}
public VTStatus DecodeFrame(CMSampleBuffer sampleBuffer, VTDecodeFrameFlags decodeFlags, IntPtr sourceFrame, out VTDecodeInfoFlags infoFlags)
{
if (Handle == IntPtr.Zero)
{
throw new ObjectDisposedException("DecompressionSession");
}
if (sampleBuffer == null)
{
throw new ArgumentNullException("sampleBuffer");
}
return(VTDecompressionSessionDecodeFrame(Handle, sampleBuffer.Handle, decodeFlags, sourceFrame, out infoFlags));
}
extern static unsafe VTStatus VTDecompressionSessionDecodeFrameWithOutputHandler(
/* VTDecompressionSessionRef */ IntPtr session,
/* CMSampleBufferRef */ IntPtr sampleBuffer,
/* VTDecodeFrameFlags */ VTDecodeFrameFlags decodeFlags,
/* VTDecodeInfoFlags */ out VTDecodeInfoFlags infoFlagsOut,
/* VTDecompressionOutputHandler */ BlockLiteral *outputHandler);
extern static VTStatus VTDecompressionSessionDecodeFrame(
/* VTDecompressionSessionRef */ IntPtr session,
/* CMSampleBufferRef */ IntPtr sampleBuffer,
/* VTDecodeFrameFlags */ VTDecodeFrameFlags decodeFlags,
/* void* */ IntPtr sourceFrame,
/* VTDecodeInfoFlags */ out VTDecodeInfoFlags infoFlagsOut);
public VTStatus DecodeFrame (CMSampleBuffer sampleBuffer, VTDecodeFrameFlags decodeFlags,
out VTDecodeInfoFlags infoFlags, VTDecompressionOutputHandler outputHandler)
{
if (Handle == IntPtr.Zero)
throw new ObjectDisposedException ("DecompressionSession");
if (sampleBuffer == null)
throw new ArgumentNullException ("sampleBuffer");
if (outputHandler == null)
throw new ArgumentNullException ("outputHandler");
unsafe {
var block = new BlockLiteral ();
var blockPtr = █
block.SetupBlock (decompressionOutputHandlerTrampoline, outputHandler);
try {
return VTDecompressionSessionDecodeFrameWithOutputHandler (Handle,
sampleBuffer.Handle, decodeFlags, out infoFlags, blockPtr);
} finally {
blockPtr->CleanupBlock ();
}
}
}
extern static unsafe VTStatus VTDecompressionSessionDecodeFrameWithOutputHandler ( /* VTDecompressionSessionRef */ IntPtr session, /* CMSampleBufferRef */ IntPtr sampleBuffer, /* VTDecodeFrameFlags */ VTDecodeFrameFlags decodeFlags, /* VTDecodeInfoFlags */ out VTDecodeInfoFlags infoFlagsOut, /* VTDecompressionOutputHandler */ BlockLiteral *outputHandler);
public VTStatus DecodeFrame (CMSampleBuffer sampleBuffer, VTDecodeFrameFlags decodeFlags, IntPtr sourceFrame, out VTDecodeInfoFlags infoFlags)
{
if (Handle == IntPtr.Zero)
throw new ObjectDisposedException ("DecompressionSession");
if (sampleBuffer == null)
throw new ArgumentNullException ("sampleBuffer");
return VTDecompressionSessionDecodeFrame (Handle, sampleBuffer.Handle, decodeFlags, sourceFrame, out infoFlags);
}
extern static VTStatus VTDecompressionSessionDecodeFrame ( /* VTDecompressionSessionRef */ IntPtr session, /* CMSampleBufferRef */ IntPtr sampleBuffer, /* VTDecodeFrameFlags */ VTDecodeFrameFlags decodeFlags, /* void* */ IntPtr sourceFrame, /* VTDecodeInfoFlags */ out VTDecodeInfoFlags infoFlagsOut);
