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nvdec: Adding Vp8 codec support (#2707)

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* first try

* second try

* working update

* Final impl

* Fixes nits

* Fix everything

* remove leftover

* Update FFmpegContext.cs

* Update Surface.cs

* Addresses gdkchan feedback

* bool not byte

* Addresses gdkchan feedback
This commit is contained in:
Ac_K 2021-10-12 22:55:57 +02:00 • committed by GitHub
parent a7109c767b
commit d1604aa762
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16 changed files with 220 additions and 35 deletions
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53
Ryujinx.Graphics.Nvdec.FFmpeg/Vp8/Decoder.cs Normal file
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using FFmpeg.AutoGen;
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();
}
}