Ryujinx/Ryujinx.Graphics.Nvdec.FFmpeg/H264/Decoder.cs
Mary c5bddfeab8
Remove dependency for FFmpeg.AutoGen and Update FFmpeg to 5.0.1 for Windows (#3466)
* Remove dependency for FFMpeg.AutoGen

Also prepare for FFMpeg 5.0 and 5.1

* Update Ryujinx.Graphics.Nvdec.Dependencies to 5.0.1-build10

* Address gdkchan's comments

* Address Ack's comment

* Address gdkchan's comment
2022-07-14 15:13:23 +02:00

56 lines
1.7 KiB
C#

using Ryujinx.Graphics.Nvdec.FFmpeg.Native;
using Ryujinx.Graphics.Video;
using System;
namespace Ryujinx.Graphics.Nvdec.FFmpeg.H264
{
public sealed class Decoder : IH264Decoder
{
public bool IsHardwareAccelerated => false;
private const int WorkBufferSize = 0x200;
private readonly byte[] _workBuffer = new byte[WorkBufferSize];
private FFmpegContext _context = new FFmpegContext(AVCodecID.AV_CODEC_ID_H264);
private int _oldOutputWidth;
private int _oldOutputHeight;
public ISurface CreateSurface(int width, int height)
{
return new Surface(width, height);
}
public bool Decode(ref H264PictureInfo pictureInfo, ISurface output, ReadOnlySpan<byte> bitstream)
{
Surface outSurf = (Surface)output;
if (outSurf.RequestedWidth != _oldOutputWidth ||
outSurf.RequestedHeight != _oldOutputHeight)
{
_context.Dispose();
_context = new FFmpegContext(AVCodecID.AV_CODEC_ID_H264);
_oldOutputWidth = outSurf.RequestedWidth;
_oldOutputHeight = outSurf.RequestedHeight;
}
Span<byte> bs = Prepend(bitstream, SpsAndPpsReconstruction.Reconstruct(ref pictureInfo, _workBuffer));
return _context.DecodeFrame(outSurf, bs) == 0;
}
private static byte[] Prepend(ReadOnlySpan<byte> data, ReadOnlySpan<byte> prep)
{
byte[] output = new byte[data.Length + prep.Length];
prep.CopyTo(output);
data.CopyTo(new Span<byte>(output).Slice(prep.Length));
return output;
}
public void Dispose() => _context.Dispose();
}
}