private void InitializeTheoraStream()
{
// Grab the first video frame ASAP.
while (Theorafile.tf_readvideo(Video.theora, yuvData, 1) == 0)
{
;
}
// Grab the first bit of audio. We're trying to start the decoding ASAP.
if (Theorafile.tf_hasaudio(Video.theora) == 1)
{
int channels, samplerate;
Theorafile.tf_audioinfo(Video.theora, out channels, out samplerate);
audioStream = new DynamicSoundEffectInstance(
samplerate,
(AudioChannels)channels
);
audioStream.BufferNeeded += OnBufferRequest;
UpdateVolume();
// Fill and queue the buffers.
for (int i = 0; i < 4; i += 1)
{
OnBufferRequest(audioStream, EventArgs.Empty);
if (audioStream.PendingBufferCount == i)
{
break;
}
}
}
currentFrame = -1;
}
public Texture2D GetTexture()
{
checkDisposed();
if (Video == null)
{
throw new InvalidOperationException();
}
// Be sure we can even get something from Theorafile...
if (State == MediaState.Stopped ||
Video.theora == IntPtr.Zero ||
Theorafile.tf_hasvideo(Video.theora) == 0)
{
// Screw it, give them the old one.
return(videoTexture[0].RenderTarget as Texture2D);
}
int thisFrame = (int)(timer.Elapsed.TotalMilliseconds / (1000.0 / Video.fps));
if (thisFrame > currentFrame)
{
// Only update the textures if we need to!
if (Theorafile.tf_readvideo(
Video.theora,
yuvData,
thisFrame - currentFrame
) == 1 || currentFrame == -1)
{
UpdateTexture();
}
currentFrame = thisFrame;
}
// Check for the end...
bool ended = Theorafile.tf_eos(Video.theora) == 1;
if (audioStream != null)
{
ended &= audioStream.PendingBufferCount == 0;
}
if (ended)
{
// FIXME: This is part of the Duration hack!
if (Video.needsDurationHack)
{
Video.Duration = timer.Elapsed; // FIXME: Frames * FPS? -flibit
}
// 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;
}
// Reset the stream no matter what happens next
Theorafile.tf_reset(Video.theora);
// If looping, go back to the start. Otherwise, we'll be exiting.
if (IsLooped)
{
// Starting over!
InitializeTheoraStream();
// Start! Again!
timer.Start();
if (audioStream != null)
{
audioStream.Play();
}
}
else
{
// We out
State = MediaState.Stopped;
}
}
// Finally.
return(videoTexture[0].RenderTarget as Texture2D);
}