diff options
author | Ronald S. Bultje <rsbultje@gmail.com> | 2011-07-20 20:24:07 +0400 |
---|---|---|
committer | Ronald S. Bultje <rsbultje@gmail.com> | 2011-07-20 21:26:49 +0400 |
commit | 80469eafb747018cb9d9a2547f65def715d073b2 (patch) | |
tree | 8ce28c850782798a289a4af84690fd24aa486a42 /libavcodec/mpegvideo.c | |
parent | e4b50572b7bae9edd0374f2ef918e6c68a4da018 (diff) |
mpegvideo: fix invalid picture unreferencing.
Mpegvideo would free frames as soon as they're not the next or prev
picture. This is fine for a single-threading model, but fails miserably
in a system where pictures can be referenced (as e.g. last/prev pic)
in other threads. Keeping track of ownership of pictures keeps image
references (e.g. motion vectors, or the reference of a motion vector)
alive as long as the picture data itself is alive.
This also happens to fix make THREADS=[3-16] fate-vsynth[12]-error.
Diffstat (limited to 'libavcodec/mpegvideo.c')
-rw-r--r-- | libavcodec/mpegvideo.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index 27dcd74a5a..d422e12bc1 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -318,7 +318,7 @@ int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared){ s->prev_pict_types[0]= s->dropable ? AV_PICTURE_TYPE_B : s->pict_type; if (pic->f.age < PREV_PICT_TYPES_BUFFER_SIZE && s->prev_pict_types[pic->f.age] == AV_PICTURE_TYPE_B) pic->f.age = INT_MAX; // Skipped MBs in B-frames are quite rare in MPEG-1/2 and it is a bit tricky to skip them anyway. - pic->owner2 = NULL; + pic->owner2 = s; return 0; fail: //for the FF_ALLOCZ_OR_GOTO macro @@ -1041,14 +1041,16 @@ int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx) /* mark&release old frames */ if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr && s->last_picture_ptr != s->next_picture_ptr && s->last_picture_ptr->f.data[0]) { if(s->out_format != FMT_H264 || s->codec_id == CODEC_ID_SVQ3){ - free_frame_buffer(s, s->last_picture_ptr); + if (s->last_picture_ptr->owner2 == s) + free_frame_buffer(s, s->last_picture_ptr); /* release forgotten pictures */ /* if(mpeg124/h263) */ if(!s->encoding){ for(i=0; i<s->picture_count; i++){ - if (s->picture[i].f.data[0] && &s->picture[i] != s->next_picture_ptr && s->picture[i].f.reference) { - av_log(avctx, AV_LOG_ERROR, "releasing zombie picture\n"); + if (s->picture[i].owner2 == s && s->picture[i].f.data[0] && &s->picture[i] != s->next_picture_ptr && s->picture[i].f.reference) { + if (!(avctx->active_thread_type & FF_THREAD_FRAME)) + av_log(avctx, AV_LOG_ERROR, "releasing zombie picture\n"); free_frame_buffer(s, &s->picture[i]); } } |