diff options
Diffstat (limited to 'src/Ryujinx.Graphics.Nvdec.FFmpeg/Vp8/Decoder.cs')
| -rw-r--r-- | src/Ryujinx.Graphics.Nvdec.FFmpeg/Vp8/Decoder.cs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/Ryujinx.Graphics.Nvdec.FFmpeg/Vp8/Decoder.cs b/src/Ryujinx.Graphics.Nvdec.FFmpeg/Vp8/Decoder.cs new file mode 100644 index 00000000..3570c3ec --- /dev/null +++ b/src/Ryujinx.Graphics.Nvdec.FFmpeg/Vp8/Decoder.cs @@ -0,0 +1,53 @@ +using Ryujinx.Graphics.Nvdec.FFmpeg.Native; +using Ryujinx.Graphics.Video; +using System; + +namespace Ryujinx.Graphics.Nvdec.FFmpeg.Vp8 +{ + public sealed class Decoder : IDecoder + { + public bool IsHardwareAccelerated => false; + + private readonly FFmpegContext _context = new FFmpegContext(AVCodecID.AV_CODEC_ID_VP8); + + public ISurface CreateSurface(int width, int height) + { + return new Surface(width, height); + } + + public bool Decode(ref Vp8PictureInfo pictureInfo, ISurface output, ReadOnlySpan<byte> bitstream) + { + Surface outSurf = (Surface)output; + + int uncompHeaderSize = pictureInfo.KeyFrame ? 10 : 3; + + byte[] frame = new byte[bitstream.Length + uncompHeaderSize]; + + uint firstPartSizeShifted = pictureInfo.FirstPartSize << 5; + + frame[0] = (byte)(pictureInfo.KeyFrame ? 0 : 1); + frame[0] |= (byte)((pictureInfo.Version & 7) << 1); + frame[0] |= 1 << 4; + frame[0] |= (byte)firstPartSizeShifted; + frame[1] |= (byte)(firstPartSizeShifted >> 8); + frame[2] |= (byte)(firstPartSizeShifted >> 16); + + if (pictureInfo.KeyFrame) + { + frame[3] = 0x9d; + frame[4] = 0x01; + frame[5] = 0x2a; + frame[6] = (byte)pictureInfo.FrameWidth; + frame[7] = (byte)((pictureInfo.FrameWidth >> 8) & 0x3F); + frame[8] = (byte)pictureInfo.FrameHeight; + frame[9] = (byte)((pictureInfo.FrameHeight >> 8) & 0x3F); + } + + bitstream.CopyTo(new Span<byte>(frame).Slice(uncompHeaderSize)); + + return _context.DecodeFrame(outSurf, frame) == 0; + } + + public void Dispose() => _context.Dispose(); + } +}
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