yading@11: /*
yading@11:  * RSO demuxer
yading@11:  * Copyright (c) 2001 Fabrice Bellard (original AU code)
yading@11:  * Copyright (c) 2010 Rafael Carre
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/channel_layout.h"
yading@11: #include "libavutil/intreadwrite.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #include "pcm.h"
yading@11: #include "rso.h"
yading@11: 
yading@11: static int rso_read_header(AVFormatContext *s)
yading@11: {
yading@11:     AVIOContext *pb = s->pb;
yading@11:     int id, rate, bps;
yading@11:     unsigned int size;
yading@11:     enum AVCodecID codec;
yading@11:     AVStream *st;
yading@11: 
yading@11:     id   = avio_rb16(pb);
yading@11:     size = avio_rb16(pb);
yading@11:     rate = avio_rb16(pb);
yading@11:     avio_rb16(pb);   /* play mode ? (0x0000 = don't loop) */
yading@11: 
yading@11:     codec = ff_codec_get_id(ff_codec_rso_tags, id);
yading@11: 
yading@11:     if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) {
yading@11:         avpriv_report_missing_feature(s, "ADPCM in RSO");
yading@11:         return AVERROR_PATCHWELCOME;
yading@11:     }
yading@11: 
yading@11:     bps = av_get_bits_per_sample(codec);
yading@11:     if (!bps) {
yading@11:         avpriv_request_sample(s, "Unknown bits per sample");
yading@11:         return AVERROR_PATCHWELCOME;
yading@11:     }
yading@11: 
yading@11:     /* now we are ready: build format streams */
yading@11:     st = avformat_new_stream(s, NULL);
yading@11:     if (!st)
yading@11:         return AVERROR(ENOMEM);
yading@11: 
yading@11:     st->duration            = (size * 8) / bps;
yading@11:     st->codec->codec_type   = AVMEDIA_TYPE_AUDIO;
yading@11:     st->codec->codec_tag    = id;
yading@11:     st->codec->codec_id     = codec;
yading@11:     st->codec->channels     = 1;
yading@11:     st->codec->channel_layout = AV_CH_LAYOUT_MONO;
yading@11:     st->codec->sample_rate  = rate;
yading@11:     st->codec->block_align  = 1;
yading@11: 
yading@11:     avpriv_set_pts_info(st, 64, 1, rate);
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: AVInputFormat ff_rso_demuxer = {
yading@11:     .name           =   "rso",
yading@11:     .long_name      =   NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"),
yading@11:     .extensions     =   "rso",
yading@11:     .read_header    =   rso_read_header,
yading@11:     .read_packet    =   ff_pcm_read_packet,
yading@11:     .read_seek      =   ff_pcm_read_seek,
yading@11:     .codec_tag      =   (const AVCodecTag* const []){ff_codec_rso_tags, 0},
yading@11: };