/src/ffmpeg/libavformat/rsodec.c
Line | Count | Source |
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 "demux.h" |
27 | | #include "internal.h" |
28 | | #include "pcm.h" |
29 | | #include "rso.h" |
30 | | |
31 | | static int rso_read_header(AVFormatContext *s) |
32 | 830 | { |
33 | 830 | AVIOContext *pb = s->pb; |
34 | 830 | int id, rate, bps; |
35 | 830 | unsigned int size; |
36 | 830 | enum AVCodecID codec; |
37 | 830 | AVStream *st; |
38 | | |
39 | 830 | id = avio_rb16(pb); |
40 | 830 | size = avio_rb16(pb); |
41 | 830 | rate = avio_rb16(pb); |
42 | 830 | avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */ |
43 | | |
44 | 830 | codec = ff_codec_get_id(ff_codec_rso_tags, id); |
45 | | |
46 | 830 | if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) { |
47 | 1 | avpriv_report_missing_feature(s, "ADPCM in RSO"); |
48 | 1 | return AVERROR_PATCHWELCOME; |
49 | 1 | } |
50 | | |
51 | 829 | bps = av_get_bits_per_sample(codec); |
52 | 829 | if (!bps) { |
53 | 145 | avpriv_request_sample(s, "Unknown bits per sample"); |
54 | 145 | return AVERROR_PATCHWELCOME; |
55 | 145 | } |
56 | | |
57 | | /* now we are ready: build format streams */ |
58 | 684 | st = avformat_new_stream(s, NULL); |
59 | 684 | if (!st) |
60 | 0 | return AVERROR(ENOMEM); |
61 | | |
62 | 684 | st->duration = (size * 8) / bps; |
63 | 684 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
64 | 684 | st->codecpar->codec_tag = id; |
65 | 684 | st->codecpar->codec_id = codec; |
66 | 684 | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; |
67 | 684 | st->codecpar->sample_rate = rate; |
68 | 684 | st->codecpar->block_align = 1; |
69 | | |
70 | 684 | avpriv_set_pts_info(st, 64, 1, rate); |
71 | | |
72 | 684 | return 0; |
73 | 684 | } |
74 | | |
75 | | const FFInputFormat ff_rso_demuxer = { |
76 | | .p.name = "rso", |
77 | | .p.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), |
78 | | .p.extensions = "rso", |
79 | | .p.codec_tag = ff_rso_codec_tags_list, |
80 | | .read_header = rso_read_header, |
81 | | .read_packet = ff_pcm_read_packet, |
82 | | .read_seek = ff_pcm_read_seek, |
83 | | }; |