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
30static 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
75AVInputFormat 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