/// <summary>
/// Decodes an encoded frame.
/// </summary>
/// <param name="encodedFrame">The encoded frame.</param>
/// <returns></returns>
public override VideoBuffer Decode(byte[] encodedFrame)
{
if (_Decoder == null)
{
_Decoder = new CocoaVp8Decoder();
}
if (_Padep.SequenceNumberingViolated)
{
_Decoder.NeedsKeyFrame = true;
return(null);
}
using (var pool = new NSAutoreleasePool())
{
GCHandle encodedFrameHandle = GCHandle.Alloc(encodedFrame, GCHandleType.Pinned);
try
{
IntPtr encodedFramePointer = encodedFrameHandle.AddrOfPinnedObject();
using (var encodedFrameData = NSData.FromBytesNoCopy(encodedFramePointer, (uint)encodedFrame.Length, false))
{
using (var buffer = new CocoaVp8Buffer())
{
if (_Decoder.DecodeFrame(encodedFrameData, buffer))
{
var planeYData = new byte[buffer.PlaneY.Length];
var planeUData = new byte[buffer.PlaneU.Length];
var planeVData = new byte[buffer.PlaneV.Length];
Marshal.Copy(buffer.PlaneY.Bytes, planeYData, 0, (int)buffer.PlaneY.Length);
Marshal.Copy(buffer.PlaneU.Bytes, planeUData, 0, (int)buffer.PlaneU.Length);
Marshal.Copy(buffer.PlaneV.Bytes, planeVData, 0, (int)buffer.PlaneV.Length);
return(new VideoBuffer(buffer.Width, buffer.Height, new[] {
new VideoPlane(planeYData, buffer.StrideY),
new VideoPlane(planeUData, buffer.StrideU),
new VideoPlane(planeVData, buffer.StrideV)
}, VideoFormat.I420));
}
return(null);
}
}
}
finally
{
encodedFrameHandle.Free();
}
}
}
