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avfilter/formats: Don't unnecessarily reget pixfmt descriptor

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Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2021-09-27 03:02:17 +02:00
parent 3a82bb8128
commit e1ddaf229d
1 changed files with 3 additions and 2 deletions
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5
libavfilter/formats.c
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@@ -113,9 +113,9 @@ static int merge_formats_internal(AVFilterFormats *a, AVFilterFormats *b,
To avoid that, pretend that there are no common formats to force the
insertion of a conversion filter. */
if (type == AVMEDIA_TYPE_VIDEO)
for (i = 0; i < a->nb_formats; i++)
for (i = 0; i < a->nb_formats; i++) {
const AVPixFmtDescriptor *const adesc = av_pix_fmt_desc_get(a->formats[i]);
for (j = 0; j < b->nb_formats; j++) {
const AVPixFmtDescriptor *adesc = av_pix_fmt_desc_get(a->formats[i]);
const AVPixFmtDescriptor *bdesc = av_pix_fmt_desc_get(b->formats[j]);
alpha2 |= adesc->flags & bdesc->flags & AV_PIX_FMT_FLAG_ALPHA;
chroma2|= adesc->nb_components > 1 && bdesc->nb_components > 1;
@@ -124,6 +124,7 @@ static int merge_formats_internal(AVFilterFormats *a, AVFilterFormats *b,
chroma1|= adesc->nb_components > 1;
}
}
}
// If chroma or alpha can be lost through merging then do not merge
if (alpha2 > alpha1 || chroma2 > chroma1)