libavcodec/dump_extradata_bsf.c

   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 "avcodec.h"
  22
  23
  24 static int dump_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
  25                      uint8_t **poutbuf, int *poutbuf_size,
  26                      const uint8_t *buf, int buf_size, int keyframe){
  27     int cmd= args ? *args : 0;
  28     /* cast to avoid warning about discarding qualifiers */
  29     if(avctx->extradata){
  30         if(  (keyframe && (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER) && cmd=='a')
  31            ||(keyframe && (cmd=='k' || !cmd))
  32            ||(cmd=='e')
  33             /*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/){
  34             int size= buf_size + avctx->extradata_size;
  35             *poutbuf_size= size;
  36             *poutbuf= av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
  37
  38             memcpy(*poutbuf, avctx->extradata, avctx->extradata_size);
  39             memcpy((*poutbuf) + avctx->extradata_size, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
  40             return 1;
  41         }
  42     }
  43     return 0;
  44 }
  45
  46 AVBitStreamFilter dump_extradata_bsf={
  47     "dump_extra",
  48     0,
  49     dump_extradata,
  50 };