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swscale: introduce isSwappedChroma

This commit is contained in:
rcombs 2021-12-23 03:49:27 -06:00
parent bb4f19f2a2
commit f8e284be69
3 changed files with 25 additions and 0 deletions

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@ -911,6 +911,25 @@ static av_always_inline int isDataInHighBits(enum AVPixelFormat pix_fmt)
return 1;
}
/*
* Identity formats where the chroma planes are swapped (CrCb order).
*/
static av_always_inline int isSwappedChroma(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
av_assert0(desc);
if (!isYUV(pix_fmt))
return 0;
if ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) && desc->nb_components < 4)
return 0;
if (desc->nb_components < 3)
return 0;
if (!isPlanarYUV(pix_fmt) || isSemiPlanarYUV(pix_fmt))
return desc->comp[1].offset > desc->comp[2].offset;
else
return desc->comp[1].plane > desc->comp[2].plane;
}
extern const uint64_t ff_dither4[2];
extern const uint64_t ff_dither8[2];

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@ -46,6 +46,7 @@ static const struct {
{"PlanarRGB", isPlanarRGB},
{"usePal", usePal},
{"DataInHighBits", isDataInHighBits},
{"SwappedChroma", isSwappedChroma},
};
static int cmp_str(const void *a, const void *b)

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@ -964,3 +964,8 @@ DataInHighBits:
y210be
y210le
SwappedChroma:
nv21
nv42
yvyu422