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avfilter/buffersrc: allow promoting color range to MPEG

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Otherwise, passing an UNSPECIFIED frame to am MPEG-only filter graph
would trigger insertion of an unnecessary vf_scale filter, which would
perform a memcpy to convert between the two.

This is safe to do because unspecified YUV frames are already
universally assumed to be MPEG range, in particular by swscale.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Niklas Haas 2024-01-12 09:16:16 +01:00 committed by Paul B Mahol
parent e8f4fd346a
commit ff09a65b4e
1 changed files with 8 additions and 2 deletions
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10
libavfilter/buffersrc.c
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@ -506,8 +506,14 @@ static int query_formats(AVFilterContext *ctx)
if ((ret = ff_add_format(&color_spaces, c->color_space)) < 0 ||
(ret = ff_set_common_color_spaces(ctx, color_spaces)) < 0)
return ret;
if ((ret = ff_add_format(&color_ranges, c->color_range)) < 0 ||
(ret = ff_set_common_color_ranges(ctx, color_ranges)) < 0)
if ((ret = ff_add_format(&color_ranges, c->color_range)) < 0)
return ret;
if (c->color_range == AVCOL_RANGE_UNSPECIFIED) {
/* allow implicitly promoting unspecified to mpeg */
if ((ret = ff_add_format(&color_ranges, AVCOL_RANGE_MPEG)) < 0)
return ret;
}
if ((ret = ff_set_common_color_ranges(ctx, color_ranges)) < 0)
return ret;
}
break;