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Code Issues Releases Activity

avcodec/mpegvideo_dec: Notify users of reinit

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Namely of reinititialization performed by
ff_mpeg_update_thread_context(), so that they can simply
update their own dimension-based buffers accordingly.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-03-25 09:08:50 +01:00
parent 2f971c7fda
commit 1d5f660ff6
2 changed files with 13 additions and 2 deletions
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6
libavcodec/mpegvideo_dec.c
View File

@ -80,7 +80,7 @@ int ff_mpeg_update_thread_context(AVCodecContext *dst,
{ {
MpegEncContext *const s1 = src->priv_data; MpegEncContext *const s1 = src->priv_data;
MpegEncContext *const s = dst->priv_data; MpegEncContext *const s = dst->priv_data;
int ret; int ret = 0;
if (dst == src) if (dst == src)
return 0; return 0;
@ -102,6 +102,7 @@ int ff_mpeg_update_thread_context(AVCodecContext *dst,
if (s1->context_initialized) { if (s1->context_initialized) {
if ((err = ff_mpv_common_init(s)) < 0) if ((err = ff_mpv_common_init(s)) < 0)
return err; return err;
ret = 1;
} }
} }
@ -110,6 +111,7 @@ int ff_mpeg_update_thread_context(AVCodecContext *dst,
s->width = s1->width; s->width = s1->width;
if ((ret = ff_mpv_common_frame_size_change(s)) < 0) if ((ret = ff_mpv_common_frame_size_change(s)) < 0)
return ret; return ret;
ret = 1;
} }
s->quarter_sample = s1->quarter_sample; s->quarter_sample = s1->quarter_sample;
@ -139,7 +141,7 @@ int ff_mpeg_update_thread_context(AVCodecContext *dst,
memcpy(&s->progressive_sequence, &s1->progressive_sequence, memcpy(&s->progressive_sequence, &s1->progressive_sequence,
(char *) &s1->first_field + sizeof(s1->first_field) - (char *) &s1->progressive_sequence); (char *) &s1->first_field + sizeof(s1->first_field) - (char *) &s1->progressive_sequence);
return 0; return ret;
} }
av_cold int ff_mpv_decode_close(AVCodecContext *avctx) av_cold int ff_mpv_decode_close(AVCodecContext *avctx)

9
libavcodec/mpegvideodec.h
View File

@ -62,6 +62,15 @@ void ff_mpv_frame_end(MpegEncContext *s);
int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f, int ff_mpv_export_qp_table(const MpegEncContext *s, AVFrame *f,
const MPVPicture *p, int qp_type); const MPVPicture *p, int qp_type);
/**
* update_thread_context for mpegvideo-based decoders. It updates
* the MPVPictures and generic stream-level parameters. If necessary
* (on dimension changes), it also performs reinitialization.
*
* @retval 1 if a reinitialization happened
* @retval 0 on success if no reinitialization happened
* @retval "<0" error code
*/
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src); int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h); void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
void ff_mpeg_flush(AVCodecContext *avctx); void ff_mpeg_flush(AVCodecContext *avctx);