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pixdesc: add a function for counting planes in a pixel format.

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This commit is contained in:
Anton Khirnov 2013-03-16 19:37:52 +01:00
parent e5c32d6da7
commit 2c328a9079
4 changed files with 25 additions and 1 deletions
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3
doc/APIchanges
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@ -13,6 +13,9 @@ libavutil: 2012-10-22
API changes, most recent first:
2013-xx-xx - lavu 52.9.0 - pixdesc.h
Add av_pix_fmt_count_planes() function for counting planes in a pixel format.
2013-xx-xx - lavfi 3.6.0
Add AVFilterGraph.nb_filters, deprecate AVFilterGraph.filter_count.

15
libavutil/pixdesc.c
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@ -1473,3 +1473,18 @@ int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt,
return 0;
}
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
int i, planes[4] = { 0 }, ret = 0;
if (!desc)
return AVERROR(EINVAL);
for (i = 0; i < desc->nb_components; i++)
planes[desc->comp[i].plane] = 1;
for (i = 0; i < FF_ARRAY_ELEMS(planes); i++)
ret += planes[i];
return ret;
}

6
libavutil/pixdesc.h
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@ -219,5 +219,11 @@ enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc);
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt,
int *h_shift, int *v_shift);
/**
* @return number of planes in pix_fmt, a negative AVERROR if pix_fmt is not a
* valid pixel format.
*/
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt);
#endif /* AVUTIL_PIXDESC_H */

2
libavutil/version.h
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@ -37,7 +37,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 8
#define LIBAVUTIL_VERSION_MINOR 9
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \