Andreas Rheinhardt ab70751c8a avcodec/codec_internal: Use bitfield for alpha_modes ...

Right now, FFCodec contains a dedicated pointer for
alpha_mode; this is wasteful, as there is only a very limited
range of options for this value, namely four.
So store it as a two-bit bitfield like color_ranges.
This reduces sizeof(FFCodec) by 16 here (the placement
of alpha_mode entailed unnecessary padding) and
saves 11328B of .data.rel.ro here (on a standard build with
no external libraries).

(If it were not for effective-type violations, one could
share the code and the table with AV_CODEC_CONFIG_COLOR_RANGE.)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2025-11-07 17:55:43 +00:00

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