1 /*
2 * g722 raw demuxer
3 * Copyright (c) 2010 Martin Storsjo
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 "libavutil/avassert.h"
23 #include "avformat.h"
24 #include "internal.h"
25 #include "rawdec.h"
26
g722_read_header(AVFormatContext * s)27 static int g722_read_header(AVFormatContext *s)
28 {
29 AVStream *st;
30
31 st = avformat_new_stream(s, NULL);
32 if (!st)
33 return AVERROR(ENOMEM);
34
35 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
36 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_G722;
37 st->codecpar->sample_rate = 16000;
38 st->codecpar->channels = 1;
39
40 st->codecpar->bits_per_coded_sample =
41 av_get_bits_per_sample(st->codecpar->codec_id);
42
43 av_assert0(st->codecpar->bits_per_coded_sample > 0);
44
45 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
46 return 0;
47 }
48
49 FF_RAW_DEMUXER_CLASS(g722)
50 AVInputFormat ff_g722_demuxer = {
51 .name = "g722",
52 .long_name = NULL_IF_CONFIG_SMALL("raw G.722"),
53 .read_header = g722_read_header,
54 .read_packet = ff_raw_read_partial_packet,
55 .flags = AVFMT_GENERIC_INDEX,
56 .extensions = "g722,722",
57 .raw_codec_id = AV_CODEC_ID_ADPCM_G722,
58 .priv_data_size = sizeof(FFRawDemuxerContext),
59 .priv_class = &g722_demuxer_class,};
60