FFmpeg/fftools at 58ce4fdeaebce5d9837ebc77e1453e7cf3a5bb1d - FFmpeg - Gitea: Git with a cup of tea

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wm4 d6fc031caf avutil/pixdesc: deprecate AV_PIX_FMT_FLAG_PSEUDOPAL PSEUDOPAL pixel formats are not paletted, but carried a palette with the intention of allowing code to treat unpaletted formats as paletted. The palette simply mapped the byte values to the resulting RGB values, making it some sort of LUT for RGB conversion. It was used for 1 byte formats only: RGB4_BYTE, BGR4_BYTE, RGB8, BGR8, GRAY8. The first 4 are awfully obscure, used only by some ancient bitmap formats. The last one, GRAY8, is more common, but its treatment is grossly incorrect. It considers full range GRAY8 only, so GRAY8 coming from typical Y video planes was not mapped to the correct RGB values. This cannot be fixed, because AVFrame.color_range can be freely changed at runtime, and there is nothing to ensure the pseudo palette is updated. Also, nothing actually used the PSEUDOPAL palette data, except xwdenc (trivially changed in the previous commit). All other code had to treat it as a special case, just to ignore or to propagate palette data. In conclusion, this was just a very strange old mechnaism that has no real justification to exist anymore (although it may have been nice and useful in the past). Now it's an artifact that makes the API harder to use: API users who allocate their own pixel data have to be aware that they need to allocate the palette, or FFmpeg will crash on them in _some_ situations. On top of this, there was no API to allocate the pseuo palette outside of av_frame_get_buffer(). This patch not only deprecates AV_PIX_FMT_FLAG_PSEUDOPAL, but also makes the pseudo palette optional. Nothing accesses it anymore, though if it's set, it's propagated. It's still allocated and initialized for compatibility with API users that rely on this feature. But new API users do not need to allocate it. This was an explicit goal of this patch. Most changes replace AV_PIX_FMT_FLAG_PSEUDOPAL with FF_PSEUDOPAL. I first tried #ifdefing all code, but it was a mess. The FF_PSEUDOPAL macro reduces the mess, and still allows defining FF_API_PSEUDOPAL to 0. Passes FATE with FF_API_PSEUDOPAL enabled and disabled. In addition, FATE passes with FF_API_PSEUDOPAL set to 1, but with allocation functions manually changed to not allocating a palette.		7 years ago
..
Makefile	Remove the ffserver program	7 years ago
cmdutils.c	fftools/cmdutils: add support for level flag in loglevel option parser	7 years ago
cmdutils.h	cmdutils: print supported codecs in show_help_bsf()	7 years ago
ffmpeg.c	lav*,tests: remove several register_all calls	7 years ago
ffmpeg.h	ffmpeg: remove dead call to av_parser_change()	7 years ago
ffmpeg_cuvid.c	…
ffmpeg_filter.c	ffmpeg_filter: use nb_threads=1 on unused filtergraph	7 years ago
ffmpeg_hw.c	ffmpeg: Use codec hardware config to configure hwaccels	7 years ago
ffmpeg_opt.c	ffmpeg: support dump bit stream filter options.	7 years ago
ffmpeg_qsv.c	…
ffmpeg_videotoolbox.c	lavc: drop VDA	7 years ago
ffplay.c	lav*,tests: remove several register_all calls	7 years ago
ffprobe.c	avutil/pixdesc: deprecate AV_PIX_FMT_FLAG_PSEUDOPAL	7 years ago