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| author | Michael Niedermayer <michaelni@gmx.at> | 2015-01-15 20:56:07 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-01-24 14:07:00 +0100 |
| commit | 1296dc6025dec85547006ffc60640153a1692b76 (patch) | |
| tree | 94de73b68afb6c0ccd5a840e8ea339b9d61725c2 /libavutil | |
| parent | c651a1aaecb5cb7bb40cf40df27f5273e8bcd245 (diff) | |
| download | ffmpeg-1296dc6025dec85547006ffc60640153a1692b76.tar.gz | |
avutil/pixdesc: rewrite AV_PIX_FMT_FLAG_PSEUDOPAL documentation
It seems many people do not understand its current documentation
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/pixdesc.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/libavutil/pixdesc.h b/libavutil/pixdesc.h index a4376b2c0e..705377df8b 100644 --- a/libavutil/pixdesc.h +++ b/libavutil/pixdesc.h @@ -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) /** |