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Fix H264 output frame size when decoding videos of different sizes (#1606)

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gdkchan 2020-10-11 06:09:38 -03:00 committed by GitHub
parent c482718d2e
commit 14fd9aa640
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2 changed files with 25 additions and 4 deletions
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21
Ryujinx.Graphics.Nvdec.H264/Decoder.cs
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@ -11,18 +11,33 @@ namespace Ryujinx.Graphics.Nvdec.H264
private readonly byte[] _workBuffer = new byte[WorkBufferSize];
private readonly FFmpegContext _context = new FFmpegContext();
private FFmpegContext _context = new FFmpegContext();
private int _oldOutputWidth;
private int _oldOutputHeight;
public ISurface CreateSurface(int width, int height)
{
return new Surface();
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();
_oldOutputWidth = outSurf.RequestedWidth;
_oldOutputHeight = outSurf.RequestedHeight;
}
Span<byte> bs = Prepend(bitstream, SpsAndPpsReconstruction.Reconstruct(ref pictureInfo, _workBuffer));
return _context.DecodeFrame((Surface)output, bs) == 0;
return _context.DecodeFrame(outSurf, bs) == 0;
}
private static byte[] Prepend(ReadOnlySpan<byte> data, ReadOnlySpan<byte> prep)

8
Ryujinx.Graphics.Nvdec.H264/Surface.cs
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@ -8,6 +8,9 @@ namespace Ryujinx.Graphics.Nvdec.H264
{
public AVFrame* Frame { get; }
public int RequestedWidth { get; }
public int RequestedHeight { get; }
public Plane YPlane => new Plane((IntPtr)Frame->data[0], Stride * Height);
public Plane UPlane => new Plane((IntPtr)Frame->data[1], UvStride * UvHeight);
public Plane VPlane => new Plane((IntPtr)Frame->data[2], UvStride * UvHeight);
@ -19,8 +22,11 @@ namespace Ryujinx.Graphics.Nvdec.H264
public int UvHeight => (Frame->height + 1) >> 1;
public int UvStride => Frame->linesize[1];
public Surface()
public Surface(int width, int height)
{
RequestedWidth = width;
RequestedHeight = height;
Frame = ffmpeg.av_frame_alloc();
}