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avutil/pixdesc: rewrite AV_PIX_FMT_FLAG_PSEUDOPAL documentation

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It seems many people do not understand its current documentation

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-01-15 20:56:07 +01:00
parent c651a1aaec
commit 1296dc6025
1 changed files with 7 additions and 3 deletions
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10
libavutil/pixdesc.h
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@ -129,10 +129,14 @@ typedef struct AVPixFmtDescriptor {
* The pixel format contains RGB-like data (as opposed to YUV/grayscale).
*/
#define AV_PIX_FMT_FLAG_RGB (1 << 5)
/**
* The pixel format is "pseudo-paletted". This means that FFmpeg treats it as
* paletted internally, but the palette is generated by the decoder and is not
* stored in the file.
* The pixel format is "pseudo-paletted". This means that it contains a
* fixed palette in the 2nd plane but the palette is fixed/constant for each
* PIX_FMT. This allows interpreting the data as if it was PAL8, which can
* in some cases be simpler. Or the data can be interpreted purely based on
* the pixel format without using the palette.
* An example of a pseudo-paletted format is AV_PIX_FMT_GRAY8
*/
#define AV_PIX_FMT_FLAG_PSEUDOPAL (1 << 6)
/**