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avcodec/mpeg12dec: Disable allocating scratchpad buffers when possible

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They are no longer used by the MPEG-1/2 decoders except when
using lowres.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-06-04 11:33:04 +02:00
parent 3acf351e77
commit ba341be095
2 changed files with 14 additions and 0 deletions
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4
libavcodec/mpeg12dec.c
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@ -1000,6 +1000,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
if (!s->avctx->lowres)
ff_mpv_framesize_disable(&s->sc);
}
return 0;
}
@ -1874,6 +1876,8 @@ static int vcr2_init_sequence(AVCodecContext *avctx)
if ((ret = ff_mpv_common_init(s)) < 0)
return ret;
if (!s->avctx->lowres)
ff_mpv_framesize_disable(&s->sc);
for (i = 0; i < 64; i++) {
int j = s->idsp.idct_permutation[i];

10
libavcodec/mpegpicture.h
View File

@ -21,6 +21,7 @@
#ifndef AVCODEC_MPEGPICTURE_H
#define AVCODEC_MPEGPICTURE_H
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
@ -135,6 +136,15 @@ int ff_mpv_pic_check_linesize(void *logctx, const struct AVFrame *f,
int ff_mpv_framesize_alloc(AVCodecContext *avctx,
ScratchpadContext *sc, int linesize);
/**
* Disable allocating the ScratchpadContext's buffers in future calls
* to ff_mpv_framesize_alloc().
*/
static inline void ff_mpv_framesize_disable(ScratchpadContext *sc)
{
sc->linesize = INT_MAX;
}
void ff_mpv_unref_picture(MPVWorkPicture *pic);
void ff_mpv_workpic_from_pic(MPVWorkPicture *wpic, MPVPicture *pic);
void ff_mpv_replace_picture(MPVWorkPicture *dst, const MPVWorkPicture *src);