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swscale: introduce isSwappedChroma
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@ -911,6 +911,25 @@ static av_always_inline int isDataInHighBits(enum AVPixelFormat pix_fmt)
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return 1;
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}
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/*
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* Identity formats where the chroma planes are swapped (CrCb order).
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*/
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static av_always_inline int isSwappedChroma(enum AVPixelFormat pix_fmt)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
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av_assert0(desc);
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if (!isYUV(pix_fmt))
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return 0;
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if ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) && desc->nb_components < 4)
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return 0;
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if (desc->nb_components < 3)
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return 0;
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if (!isPlanarYUV(pix_fmt) || isSemiPlanarYUV(pix_fmt))
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return desc->comp[1].offset > desc->comp[2].offset;
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else
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return desc->comp[1].plane > desc->comp[2].plane;
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}
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extern const uint64_t ff_dither4[2];
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extern const uint64_t ff_dither8[2];
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@ -46,6 +46,7 @@ static const struct {
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{"PlanarRGB", isPlanarRGB},
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{"usePal", usePal},
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{"DataInHighBits", isDataInHighBits},
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{"SwappedChroma", isSwappedChroma},
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};
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static int cmp_str(const void *a, const void *b)
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@ -964,3 +964,8 @@ DataInHighBits:
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y210be
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y210le
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SwappedChroma:
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nv21
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nv42
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yvyu422
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