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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 "bsf.h"
24 #include "internal.h"
25 
27 {
28  int ret;
29 
30  ret = ff_bsf_get_packet_ref(ctx, pkt);
31  if (ret < 0)
32  return ret;
33 
34  while (pkt->size > 0 && !pkt->data[pkt->size - 1])
35  pkt->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 };
static int chomp_filter(AVBSFContext *ctx, AVPacket *pkt)
Definition: chomp_bsf.c:26
The bitstream filter state.
Definition: avcodec.h:5720
int size
Definition: avcodec.h:1453
static AVPacket pkt
const char * name
Definition: avcodec.h:5770
uint8_t * data
Definition: avcodec.h:1452
const AVBitStreamFilter ff_chomp_bsf
This filter removes a string of NULL bytes from the end of a packet.
Definition: chomp_bsf.c:43
AVFormatContext * ctx
Definition: movenc.c:48
Libavcodec external API header.
common internal api header.
This structure stores compressed data.
Definition: avcodec.h:1429
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:238