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2ba45a60 DM |
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 | ||
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->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
36 | st->codec->codec_id = AV_CODEC_ID_ADPCM_G722; | |
37 | st->codec->sample_rate = 16000; | |
38 | st->codec->channels = 1; | |
39 | ||
40 | st->codec->bits_per_coded_sample = | |
41 | av_get_bits_per_sample(st->codec->codec_id); | |
42 | ||
43 | av_assert0(st->codec->bits_per_coded_sample > 0); | |
44 | ||
45 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); | |
46 | return 0; | |
47 | } | |
48 | ||
49 | AVInputFormat ff_g722_demuxer = { | |
50 | .name = "g722", | |
51 | .long_name = NULL_IF_CONFIG_SMALL("raw G.722"), | |
52 | .read_header = g722_read_header, | |
53 | .read_packet = ff_raw_read_partial_packet, | |
54 | .flags = AVFMT_GENERIC_INDEX, | |
55 | .extensions = "g722,722", | |
56 | .raw_codec_id = AV_CODEC_ID_ADPCM_G722, | |
57 | }; |