blob: b2d9a7c403ede477febbc6af6beb8e11e3467321
1 | /* |
2 | * RSO demuxer |
3 | * Copyright (c) 2001 Fabrice Bellard (original AU code) |
4 | * Copyright (c) 2010 Rafael Carre |
5 | * |
6 | * This file is part of FFmpeg. |
7 | * |
8 | * FFmpeg is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU Lesser General Public |
10 | * License as published by the Free Software Foundation; either |
11 | * version 2.1 of the License, or (at your option) any later version. |
12 | * |
13 | * FFmpeg is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
16 | * Lesser General Public License for more details. |
17 | * |
18 | * You should have received a copy of the GNU Lesser General Public |
19 | * License along with FFmpeg; if not, write to the Free Software |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
21 | */ |
22 | |
23 | #include "libavutil/channel_layout.h" |
24 | #include "libavutil/intreadwrite.h" |
25 | #include "avformat.h" |
26 | #include "internal.h" |
27 | #include "pcm.h" |
28 | #include "rso.h" |
29 | |
30 | static int rso_read_header(AVFormatContext *s) |
31 | { |
32 | AVIOContext *pb = s->pb; |
33 | int id, rate, bps; |
34 | unsigned int size; |
35 | enum AVCodecID codec; |
36 | AVStream *st; |
37 | |
38 | id = avio_rb16(pb); |
39 | size = avio_rb16(pb); |
40 | rate = avio_rb16(pb); |
41 | avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */ |
42 | |
43 | codec = ff_codec_get_id(ff_codec_rso_tags, id); |
44 | |
45 | if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) { |
46 | avpriv_report_missing_feature(s, "ADPCM in RSO"); |
47 | return AVERROR_PATCHWELCOME; |
48 | } |
49 | |
50 | bps = av_get_bits_per_sample(codec); |
51 | if (!bps) { |
52 | avpriv_request_sample(s, "Unknown bits per sample"); |
53 | return AVERROR_PATCHWELCOME; |
54 | } |
55 | |
56 | /* now we are ready: build format streams */ |
57 | st = avformat_new_stream(s, NULL); |
58 | if (!st) |
59 | return AVERROR(ENOMEM); |
60 | |
61 | st->duration = (size * 8) / bps; |
62 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
63 | st->codecpar->codec_tag = id; |
64 | st->codecpar->codec_id = codec; |
65 | st->codecpar->channels = 1; |
66 | st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; |
67 | st->codecpar->sample_rate = rate; |
68 | st->codecpar->block_align = 1; |
69 | |
70 | avpriv_set_pts_info(st, 64, 1, rate); |
71 | |
72 | return 0; |
73 | } |
74 | |
75 | AVInputFormat ff_rso_demuxer = { |
76 | .name = "rso", |
77 | .long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), |
78 | .extensions = "rso", |
79 | .read_header = rso_read_header, |
80 | .read_packet = ff_pcm_read_packet, |
81 | .read_seek = ff_pcm_read_seek, |
82 | .codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0}, |
83 | }; |
84 |