public void UpdateVideo(float elapsedFrameTime)
{
while (_currentVideo.playms <= elapsedFrameTime && TheoraPlay.THEORAPLAY_availableVideo(_theoraDecoder) != 0)
{
_currentVideo = _nextVideo;
var nextFrame = TheoraPlay.THEORAPLAY_getVideo(_theoraDecoder);
if (nextFrame != IntPtr.Zero)
{
TheoraPlay.THEORAPLAY_freeVideo(_previousFrame);
_previousFrame = _videoStream;
_videoStream = nextFrame;
_nextVideo = GetVideoFrame(_videoStream);
}
}
IsFinished = TheoraPlay.THEORAPLAY_isDecoding(_theoraDecoder) == 0;
}
public Texture2D GetTexture()
{
checkDisposed();
if (Video == null)
{
throw new InvalidOperationException();
}
// Be sure we can even get something from TheoraPlay...
if (State == MediaState.Stopped ||
Video.theoraDecoder == IntPtr.Zero ||
TheoraPlay.THEORAPLAY_isInitialized(Video.theoraDecoder) == 0 ||
TheoraPlay.THEORAPLAY_hasVideoStream(Video.theoraDecoder) == 0)
{
// Screw it, give them the old one.
return(videoTexture[0].RenderTarget as Texture2D);
}
// Get the latest video frames.
bool hasFrames = true;
while (nextVideo.playms <= timer.ElapsedMilliseconds && hasFrames)
{
currentVideo = nextVideo;
hasFrames = TheoraPlay.THEORAPLAY_availableVideo(Video.theoraDecoder) > 0;
if (hasFrames)
{
IntPtr nextFrame = TheoraPlay.THEORAPLAY_getVideo(Video.theoraDecoder);
TheoraPlay.THEORAPLAY_freeVideo(previousFrame);
previousFrame = Video.videoStream;
Video.videoStream = nextFrame;
nextVideo = TheoraPlay.getVideoFrame(Video.videoStream);
}
}
// Check for the end...
if (TheoraPlay.THEORAPLAY_isDecoding(Video.theoraDecoder) == 0)
{
// FIXME: This is part of the Duration hack!
if (Video.needsDurationHack)
{
Video.Duration = new TimeSpan(0, 0, 0, 0, (int)currentVideo.playms);
}
// Stop and reset the timer. If we're looping, the loop will start it again.
timer.Stop();
timer.Reset();
// Kill whatever audio/video we've got
if (audioStream != null)
{
audioStream.Stop();
audioStream.Dispose();
audioStream = null;
}
TheoraPlay.THEORAPLAY_freeVideo(previousFrame);
Video.AttachedToPlayer = false;
Video.Dispose();
// If looping, go back to the start. Otherwise, we'll be exiting.
if (IsLooped && State == MediaState.Playing)
{
// Starting over!
Video.AttachedToPlayer = true;
InitializeTheoraStream();
// Start! Again!
timer.Start();
if (audioStream != null)
{
audioStream.Play();
}
}
else
{
// We out, give them the last frame.
State = MediaState.Stopped;
return(videoTexture[0].RenderTarget as Texture2D);
}
}
// Set up an environment to muck about in.
GL_pushState();
// Prepare YUV GL textures with our current frame data
currentDevice.GLDevice.SetTextureData2DPointer(
yuvTextures[0],
currentVideo.pixels
);
currentDevice.GLDevice.SetTextureData2DPointer(
yuvTextures[1],
new IntPtr(
currentVideo.pixels.ToInt64() +
(currentVideo.width * currentVideo.height)
)
);
currentDevice.GLDevice.SetTextureData2DPointer(
yuvTextures[2],
new IntPtr(
currentVideo.pixels.ToInt64() +
(currentVideo.width * currentVideo.height) +
(currentVideo.width / 2 * currentVideo.height / 2)
)
);
// Draw the YUV textures to the framebuffer with our shader.
currentDevice.DrawPrimitives(
PrimitiveType.TriangleStrip,
0,
2
);
// Clean up after ourselves.
GL_popState();
// Finally.
return(videoTexture[0].RenderTarget as Texture2D);
}