WebMVideoStreamDecoder

Remarks

The join between the two halves of this module: a MatroskaDemuxer that turns a file into packets, and whatever VideoCodecRegistry has that can turn those packets into pictures. Neither knows about the other, and this is the fifty lines that make them one thing a player can hold.

It never returns NeedMoreData. The interface allows it, for a codec that reorders; this loops internally until a frame comes out or the file ends, because the caller is a decode thread whose entire job is to wait for a frame and there is nothing else it could usefully do with the answer.

The container stays reachable. Container is public because a WebM's audio track is in the same file and has to be demuxed by the same reader — see MatroskaAudioStreamDecoder, which shares this demuxer rather than opening the file twice.

Fields and properties (7)

• public MatroskaDemuxer Container

  The demuxer, so that the same file's audio track can be read from it.

• public MatroskaTrack Track

  What the container said about the track being decoded.

• public VideoFormat Format

  The size and layout it produces.

• public Int2 DisplaySize
• public TimeSpan Duration

  How long the whole video is, or Zero if the container does not say.

• public TimeSpan Position

  Where the decoder has got to.

• public bool CanSeek

  Whether Seek works.

Methods (6)

• public WebMVideoStreamDecoder(string path)

  Opens a file.

• public WebMVideoStreamDecoder(Stream stream, bool leaveOpen = false)

  Opens a stream.

• public WebMVideoStreamDecoder(MatroskaDemuxer demuxer, bool ownsDemuxer)

  Decodes the video track of a demuxer somebody else owns.

• public VideoDecodeStatus DecodeNext(VideoFrame destination)

  Decodes the next frame.

• public void Seek(TimeSpan position)

  Moves to a position.

• public void Dispose()

  Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

Used by (9)

• VideoGameVideoPlayback
• AudioMasterClockTestsVixen.Video.Tests
• MatroskaAudioTestsVixen.Video.Tests
• OpusAudioTrackTestsVixen.Video.Codecs.Tests
• VideoPlaybackVixen.Video
• VideoPlayerTestsVixen.Video.Tests
• VideoSystemTestsVixen.Video.Tests
• VideoTextureTestsVixen.Video.Tests
• WebMVideoStreamDecoderTestsVixen.Video.Tests