FFmpeg
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 "bsf.h"
23 #include "bsf_internal.h"
24 
26 {
27  int ret;
28 
29  ret = ff_bsf_get_packet_ref(ctx, pkt);
30  if (ret < 0)
31  return ret;
32 
33  while (pkt->size > 0 && !pkt->data[pkt->size - 1])
34  pkt->size--;
35 
36  return 0;
37 }
38 
39 /**
40  * This filter removes a string of NULL bytes from the end of a packet.
41  */
43  .name = "chomp",
44  .filter = chomp_filter,
45 };
static int chomp_filter(AVBSFContext *ctx, AVPacket *pkt)
Definition: chomp_bsf.c:25
The bitstream filter state.
Definition: bsf.h:49
int size
Definition: packet.h:356
static AVPacket pkt
const char * name
Definition: bsf.h:99
uint8_t * data
Definition: packet.h:355
const AVBitStreamFilter ff_chomp_bsf
This filter removes a string of NULL bytes from the end of a packet.
Definition: chomp_bsf.c:42
AVFormatContext * ctx
Definition: movenc.c:48
This structure stores compressed data.
Definition: packet.h:332
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition: bsf.c:249