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swscale: Introduce a helper to identify semi-planar formats 

This cleans up the ever-more-unreadable list of semi-planar
exclusions for selecting the planar copy wrapper.
This commit is contained in:
Philip Langdale 2018-03-02 09:09:05 -08:00
parent 1c7f1f38c5
commit dd3f1e3a11
2 changed files with 12 additions and 6 deletions
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11
libswscale/swscale_internal.h
View File

@ -676,6 +676,17 @@ static av_always_inline int isPlanarYUV(enum AVPixelFormat pix_fmt)
return ((desc->flags & AV_PIX_FMT_FLAG_PLANAR) && isYUV(pix_fmt));
}
/*
* Identity semi-planar YUV formats. Specifically, those are YUV formats
* where the second and third components (U & V) are on the same plane.
*/
static av_always_inline int isSemiPlanarYUV(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
av_assert0(desc);
return (isPlanarYUV(pix_fmt) && desc->comp[1].plane == desc->comp[2].plane);
}
static av_always_inline int isRGB(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);

7
libswscale/swscale_unscaled.c
View File

@ -1930,12 +1930,7 @@ void ff_get_unscaled_swscale(SwsContext *c)
(isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
c->chrDstHSubSample == c->chrSrcHSubSample &&
c->chrDstVSubSample == c->chrSrcVSubSample &&
dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
dstFormat != AV_PIX_FMT_P010LE && dstFormat != AV_PIX_FMT_P010BE &&
dstFormat != AV_PIX_FMT_P016LE && dstFormat != AV_PIX_FMT_P016BE &&
srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21 &&
srcFormat != AV_PIX_FMT_P010LE && srcFormat != AV_PIX_FMT_P010BE &&
srcFormat != AV_PIX_FMT_P016LE && srcFormat != AV_PIX_FMT_P016BE))
!isSemiPlanarYUV(srcFormat) && !isSemiPlanarYUV(dstFormat)))
{
if (isPacked(c->srcFormat))
c->swscale = packedCopyWrapper;