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
chomp_filter(AVBSFContext * ctx,AVPacket * pkt)25 static int chomp_filter(AVBSFContext *ctx, AVPacket *pkt)
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 */
42 const AVBitStreamFilter ff_chomp_bsf = {
43 .name = "chomp",
44 .filter = chomp_filter,
45 };
46