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chomp_bsf.c
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1 /*
2  * Chomp bitstream filter
3  * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avcodec.h"
23 #include "internal.h"
24 
26  AVCodecContext *avctx, const char *args,
27  uint8_t **poutbuf, int *poutbuf_size,
28  const uint8_t *buf, int buf_size,
29  int keyframe)
30 {
31  while (buf_size > 0 && !buf[buf_size-1])
32  buf_size--;
33 
34  *poutbuf = (uint8_t*) buf;
35  *poutbuf_size = buf_size;
36 
37  return 0;
38 }
39 
40 /**
41  * This filter removes a string of NULL bytes from the end of a packet.
42  */
44  .name = "chomp",
45  .filter = chomp_filter,
46 };