FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
remove_extradata_bsf.c
Go to the documentation of this file.
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 remove_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;
29 
30  if(!bsfc->parser){
31  bsfc->parser= av_parser_init(avctx->codec_id);
32  }
33  s= bsfc->parser;
34 
35  if(s && s->parser->split){
36  if( (((avctx->flags & CODEC_FLAG_GLOBAL_HEADER) || (avctx->flags2 & CODEC_FLAG2_LOCAL_HEADER)) && cmd=='a')
37  ||(!keyframe && cmd=='k')
38  ||(cmd=='e' || !cmd)
39  ){
40  int i= s->parser->split(avctx, buf, buf_size);
41  buf += i;
42  buf_size -= i;
43  }
44  }
45  *poutbuf= (uint8_t *) buf;
46  *poutbuf_size= buf_size;
47 
48  return 0;
49 }
50 
52  .name = "remove_extra",
53  .filter = remove_extradata,
54 };