v|= 0x7F >> (7-(bits_count&7));
if(v==0x7F)
- return 1;
+ return s->mb_num;
}else{
if(v == ff_mpeg4_resync_prefix[bits_count&7]){
- int len;
+ int len, mb_num;
+ int mb_num_bits= av_log2(s->mb_num - 1) + 1;
GetBitContext gb= s->gb;
skip_bits(&s->gb, 1);
if(get_bits1(&s->gb)) break;
}
+ mb_num= get_bits(&s->gb, mb_num_bits);
+ if(!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits)
+ mb_num= -1;
+
s->gb= gb;
if(len>=ff_mpeg4_get_video_packet_prefix_length(s))
- return 1;
+ return mb_num;
}
}
return 0;
av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
return -1;
}
- if(s->pict_type == AV_PICTURE_TYPE_B){
- int mb_x = 0, mb_y = 0;
-
- while (s->next_picture.f.mbskip_table[s->mb_index2xy[mb_num]]) {
- if (!mb_x) ff_thread_await_progress((AVFrame*)s->next_picture_ptr, mb_y++, 0);
- mb_num++;
- if (++mb_x == s->mb_width) mb_x = 0;
- }
- if(mb_num >= s->mb_num) return -1; // slice contains just skipped MBs which where already decoded
- }
s->mb_x= mb_num % s->mb_width;
s->mb_y= mb_num / s->mb_width;
/* per-MB end of slice check */
if(s->codec_id==CODEC_ID_MPEG4){
- if(mpeg4_is_resync(s)){
- const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
+ int next= mpeg4_is_resync(s);
+ if(next) {
+ if (s->mb_x + s->mb_y*s->mb_width + 1 > next && s->avctx->error_recognition >= FF_ER_AGGRESSIVE) {
+ return -1;
+ } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
+ return SLICE_END;
if(s->pict_type==AV_PICTURE_TYPE_B){
+ const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
ff_thread_await_progress((AVFrame*)s->next_picture_ptr,
(s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0);
+ if (s->next_picture.f.mbskip_table[xy + delta])
+ return SLICE_OK;
}
- if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture.f.mbskip_table[xy + delta])
- return SLICE_OK;
return SLICE_END;
}
}
};
AVCodec ff_mpeg4_decoder = {
- "mpeg4",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_MPEG4,
- sizeof(MpegEncContext),
- decode_init,
- NULL,
- ff_h263_decode_end,
- ff_h263_decode_frame,
- CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_FRAME_THREADS,
+ .name = "mpeg4",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_MPEG4,
+ .priv_data_size = sizeof(MpegEncContext),
+ .init = decode_init,
+ .close = ff_h263_decode_end,
+ .decode = ff_h263_decode_frame,
+ .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_FRAME_THREADS,
.flush= ff_mpeg_flush,
.max_lowres= 3,
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
#if CONFIG_MPEG4_VDPAU_DECODER
AVCodec ff_mpeg4_vdpau_decoder = {
- "mpeg4_vdpau",
- AVMEDIA_TYPE_VIDEO,
- CODEC_ID_MPEG4,
- sizeof(MpegEncContext),
- decode_init,
- NULL,
- ff_h263_decode_end,
- ff_h263_decode_frame,
- CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
+ .name = "mpeg4_vdpau",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_MPEG4,
+ .priv_data_size = sizeof(MpegEncContext),
+ .init = decode_init,
+ .close = ff_h263_decode_end,
+ .decode = ff_h263_decode_frame,
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU,
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"),
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_VDPAU_MPEG4, PIX_FMT_NONE},
};