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| author | Philip Langdale <philipl@overt.org> | 2020-12-05 20:25:29 -0800 |
|---|---|---|
| committer | Philip Langdale <philipl@overt.org> | 2020-12-06 14:59:24 -0800 |
| commit | 67bb11b5f6548c3b273b575f44077db19bb9a98e (patch) | |
| tree | 5cf07b8f2c6e20ea2d34a82cf86ab9fd0a22d516 /libavcodec/nvdec.c | |
| parent | 51dfd6f1bdb03bfc7574b12e921fb3b8639ba5cf (diff) | |
| download | ffmpeg-67bb11b5f6548c3b273b575f44077db19bb9a98e.tar.gz | |
avcodec/nvdec: Add support for decoding monochrome av1
The nvidia hardware explicitly supports decoding monochrome content,
presumably for the AVIF alpha channel. Supporting this requires an
adjustment in av1dec and explicit monochrome detection in nvdec.
I'm not sure why the monochrome path in av1dec did what it did - it
seems non-functional - YUV440P doesn't seem a logical pix_fmt for
monochrome and conditioning on chroma sub-sampling doesn't make sense.
So I changed it.
I've tested 8bit content, but I haven't found a way to create a 10bit
sample, so that path is untested for now.
Diffstat (limited to 'libavcodec/nvdec.c')
| -rw-r--r-- | libavcodec/nvdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/nvdec.c b/libavcodec/nvdec.c index 48281293ce..23c84d9acf 100644 --- a/libavcodec/nvdec.c +++ b/libavcodec/nvdec.c @@ -83,6 +83,9 @@ static int map_chroma_format(enum AVPixelFormat pix_fmt) { int shift_h = 0, shift_v = 0; + if (av_pix_fmt_count_planes(pix_fmt) == 1) + return cudaVideoChromaFormat_Monochrome; + av_pix_fmt_get_chroma_sub_sample(pix_fmt, &shift_h, &shift_v); if (shift_h == 1 && shift_v == 1) |