/*
  * RSO demuxer
  * Copyright (c) 2001 Fabrice Bellard (original AU code)
  * Copyright (c) 2010 Rafael Carre
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #include "libavutil/channel_layout.h"

 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "internal.h"

 #include "pcm.h"

 #include "rso.h"
 

 static int rso_read_header(AVFormatContext *s)

 {

     AVIOContext *pb = s->pb;

     int id, rate, bps;
     unsigned int size;

     enum AVCodecID codec;

     AVStream *st;
 

     id   = avio_rb16(pb);
     size = avio_rb16(pb);
     rate = avio_rb16(pb);
     avio_rb16(pb);   /* play mode ? (0x0000 = don't loop) */

 
     codec = ff_codec_get_id(ff_codec_rso_tags, id);
 

     if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) {

         avpriv_report_missing_feature(s, "ADPCM in RSO");

         return AVERROR_PATCHWELCOME;
     }
 
     bps = av_get_bits_per_sample(codec);
     if (!bps) {

         avpriv_request_sample(s, "Unknown bits per sample");

         return AVERROR_PATCHWELCOME;

     }
 
     /* now we are ready: build format streams */

     st = avformat_new_stream(s, NULL);

     if (!st)
         return AVERROR(ENOMEM);
 
     st->duration            = (size * 8) / bps;
     st->codec->codec_type   = AVMEDIA_TYPE_AUDIO;
     st->codec->codec_tag    = id;
     st->codec->codec_id     = codec;
     st->codec->channels     = 1;

     st->codec->channel_layout = AV_CH_LAYOUT_MONO;

     st->codec->sample_rate  = rate;

     st->codec->block_align  = 1;

     avpriv_set_pts_info(st, 64, 1, rate);

 
     return 0;
 }
 

 AVInputFormat ff_rso_demuxer = {

     .name           =   "rso",

     .long_name      =   NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"),

     .extensions     =   "rso",
     .read_header    =   rso_read_header,

     .read_packet    =   ff_pcm_read_packet,

     .read_seek      =   ff_pcm_read_seek,

     .codec_tag      =   (const AVCodecTag* const []){ff_codec_rso_tags, 0},
 };