/src/ffmpeg/libavformat/wvedec.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright (c) 2015 Paul B Mahol |
3 | | * |
4 | | * This file is part of FFmpeg. |
5 | | * |
6 | | * FFmpeg is free software; you can redistribute it and/or |
7 | | * modify it under the terms of the GNU Lesser General Public |
8 | | * License as published by the Free Software Foundation; either |
9 | | * version 2.1 of the License, or (at your option) any later version. |
10 | | * |
11 | | * FFmpeg is distributed in the hope that it will be useful, |
12 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | | * Lesser General Public License for more details. |
15 | | * |
16 | | * You should have received a copy of the GNU Lesser General Public |
17 | | * License along with FFmpeg; if not, write to the Free Software |
18 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | | */ |
20 | | |
21 | | #include "avformat.h" |
22 | | #include "demux.h" |
23 | | #include "internal.h" |
24 | | #include "pcm.h" |
25 | | |
26 | | static int wve_probe(const AVProbeData *p) |
27 | 358k | { |
28 | 358k | if (memcmp(p->buf, "ALawSoundFile**\0\017\020", 18) || |
29 | 358k | memcmp(p->buf + 22, "\0\0\0\1\0\0\0\0\0\0", 10)) |
30 | 358k | return 0; |
31 | 96 | return AVPROBE_SCORE_MAX; |
32 | 358k | } |
33 | | |
34 | | static int wve_read_header(AVFormatContext *s) |
35 | 5.01k | { |
36 | 5.01k | AVStream *st; |
37 | | |
38 | 5.01k | st = avformat_new_stream(s, NULL); |
39 | 5.01k | if (!st) |
40 | 0 | return AVERROR(ENOMEM); |
41 | | |
42 | 5.01k | avio_skip(s->pb, 18); |
43 | 5.01k | st->duration = avio_rb32(s->pb); |
44 | 5.01k | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
45 | 5.01k | st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW; |
46 | 5.01k | st->codecpar->sample_rate = 8000; |
47 | 5.01k | st->codecpar->ch_layout.nb_channels = 1; |
48 | 5.01k | st->codecpar->bits_per_coded_sample = 8; |
49 | 5.01k | st->codecpar->block_align = st->codecpar->bits_per_coded_sample * |
50 | 5.01k | st->codecpar->ch_layout.nb_channels / 8; |
51 | 5.01k | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
52 | 5.01k | avio_skip(s->pb, 10); |
53 | | |
54 | 5.01k | return 0; |
55 | 5.01k | } |
56 | | |
57 | | const FFInputFormat ff_wve_demuxer = { |
58 | | .p.name = "wve", |
59 | | .p.long_name = NULL_IF_CONFIG_SMALL("Psion 3 audio"), |
60 | | .read_probe = wve_probe, |
61 | | .read_header = wve_read_header, |
62 | | .read_packet = ff_pcm_read_packet, |
63 | | .read_seek = ff_pcm_read_seek, |
64 | | }; |