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avcodec/mpegpicture: Use union for b_scratchpad and rd_scratchpad

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These pointers point to the same buffers, so one can just
use a union for them and avoid synchronising one of them.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-04-18 23:13:58 +02:00
parent 12fcbff446
commit d0f76e6a11
3 changed files with 4 additions and 4 deletions
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1
libavcodec/mpegpicture.c
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@ -175,7 +175,6 @@ int ff_mpeg_framesize_alloc(AVCodecContext *avctx, MotionEstContext *me,
sc->linesize = linesizeabs;
me->temp = me->scratchpad;
sc->rd_scratchpad = me->scratchpad;
sc->b_scratchpad = me->scratchpad;
sc->obmc_scratchpad = me->scratchpad + 16;

6
libavcodec/mpegpicture.h
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@ -33,9 +33,11 @@
typedef struct ScratchpadContext {
uint8_t *edge_emu_buffer; ///< temporary buffer for if MVs point to out-of-frame data
uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
uint8_t *obmc_scratchpad;
uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
union {
uint8_t *b_scratchpad; ///< scratchpad used for writing into write only buffers
uint8_t *rd_scratchpad; ///< scratchpad for rate distortion mb decision
};
int linesize; ///< linesize that the buffers in this context have been allocated for
} ScratchpadContext;

1
libavcodec/mpegvideo.c
View File

@ -440,7 +440,6 @@ static void free_duplicate_context(MpegEncContext *s)
av_freep(&s->sc.edge_emu_buffer);
av_freep(&s->me.scratchpad);
s->me.temp =
s->sc.rd_scratchpad =
s->sc.b_scratchpad =
s->sc.obmc_scratchpad = NULL;
s->sc.linesize = 0;