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  1. /*
  2.  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include <string.h>
  22.  
  23. #include "avcodec.h"
  24. #include "libavutil/mem.h"
  25.  
  26.  
  27. static int dump_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
  28.                      uint8_t **poutbuf, int *poutbuf_size,
  29.                      const uint8_t *buf, int buf_size, int keyframe){
  30.     int cmd= args ? *args : 0;
  31.     /* cast to avoid warning about discarding qualifiers */
  32.     if(avctx->extradata){
  33.         if(  (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER) && cmd=='a')
  34.            ||(keyframe && (cmd=='k' || !cmd))
  35.            ||(cmd=='e')
  36.             /*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/){
  37.             int size= buf_size + avctx->extradata_size;
  38.             *poutbuf_size= size;
  39.             *poutbuf= av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
  40.  
  41.             memcpy(*poutbuf, avctx->extradata, avctx->extradata_size);
  42.             memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
  43.             return 1;
  44.         }
  45.     }
  46.     return 0;
  47. }
  48.  
  49. AVBitStreamFilter ff_dump_extradata_bsf={
  50.     .name   = "dump_extra",
  51.     .filter = dump_extradata,
  52. };
  53.