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2ba45a60 DM |
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->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
63 | st->codec->codec_tag = id; | |
64 | st->codec->codec_id = codec; | |
65 | st->codec->channels = 1; | |
66 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; | |
67 | st->codec->sample_rate = rate; | |
68 | st->codec->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 | }; |