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avutil/pixdesc: Add av_chroma_location_(enum_to_pos|pos_to_enum)

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They are intended as replacements for avcodec_enum_to_chroma_pos()
and avcodec_chroma_pos_to_enum().

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-09-21 02:30:39 +02:00
parent cf856d8957
commit 8be6552aa4
4 changed files with 50 additions and 2 deletions
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22
libavutil/pixdesc.h
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@ -264,6 +264,28 @@ const char *av_chroma_location_name(enum AVChromaLocation location);
*/
int av_chroma_location_from_name(const char *name);
/**
* Converts AVChromaLocation to swscale x/y chroma position.
*
* The positions represent the chroma (0,0) position in a coordinates system
* with luma (0,0) representing the origin and luma(1,1) representing 256,256
*
* @param xpos horizontal chroma sample position
* @param ypos vertical chroma sample position
*/
int av_chroma_location_enum_to_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
/**
* Converts swscale x/y chroma position to AVChromaLocation.
*
* The positions represent the chroma (0,0) position in a coordinates system
* with luma (0,0) representing the origin and luma(1,1) representing 256,256
*
* @param xpos horizontal chroma sample position
* @param ypos vertical chroma sample position
*/
enum AVChromaLocation av_chroma_location_pos_to_enum(int xpos, int ypos);
/**
* Return the pixel format corresponding to name.
*