2010-07-20 14:13:24 +00:00
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/*
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* RSO demuxer
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* Copyright (c) 2001 Fabrice Bellard (original AU code)
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* Copyright (c) 2010 Rafael Carre
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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2012-04-07 22:18:37 +00:00
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#include "libavutil/channel_layout.h"
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2010-07-20 14:13:24 +00:00
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.h"
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2010-08-30 21:17:34 +00:00
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#include "pcm.h"
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2010-07-20 14:13:24 +00:00
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#include "rso.h"
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2012-01-12 12:20:36 +00:00
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static int rso_read_header(AVFormatContext *s)
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2010-07-20 14:13:24 +00:00
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{
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2011-02-20 10:04:12 +00:00
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AVIOContext *pb = s->pb;
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2010-07-20 14:13:24 +00:00
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int id, rate, bps;
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unsigned int size;
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2012-08-05 09:11:04 +00:00
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enum AVCodecID codec;
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2010-07-20 14:13:24 +00:00
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AVStream *st;
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2011-02-21 15:43:01 +00:00
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id = avio_rb16(pb);
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size = avio_rb16(pb);
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rate = avio_rb16(pb);
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avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */
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2010-07-20 14:13:24 +00:00
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codec = ff_codec_get_id(ff_codec_rso_tags, id);
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2012-08-05 09:11:04 +00:00
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if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) {
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2010-07-20 14:13:24 +00:00
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av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n");
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return AVERROR_PATCHWELCOME;
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}
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bps = av_get_bits_per_sample(codec);
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if (!bps) {
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av_log_ask_for_sample(s, "could not determine bits per sample\n");
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return AVERROR_INVALIDDATA;
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}
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/* now we are ready: build format streams */
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2011-06-18 09:43:24 +00:00
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st = avformat_new_stream(s, NULL);
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2010-07-20 14:13:24 +00:00
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if (!st)
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return AVERROR(ENOMEM);
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st->duration = (size * 8) / bps;
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_tag = id;
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st->codec->codec_id = codec;
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st->codec->channels = 1;
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2012-04-07 22:18:37 +00:00
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st->codec->channel_layout = AV_CH_LAYOUT_MONO;
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2010-07-20 14:13:24 +00:00
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st->codec->sample_rate = rate;
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2011-11-29 18:28:15 +00:00
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avpriv_set_pts_info(st, 64, 1, rate);
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2010-07-20 14:13:24 +00:00
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return 0;
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}
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#define BLOCK_SIZE 1024 /* in samples */
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static int rso_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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int bps = av_get_bits_per_sample(s->streams[0]->codec->codec_id);
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int ret = av_get_packet(s->pb, pkt, BLOCK_SIZE * bps >> 3);
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if (ret < 0)
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return ret;
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2012-04-30 20:58:27 +00:00
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
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2010-07-20 14:13:24 +00:00
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pkt->stream_index = 0;
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return 0;
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}
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2011-01-25 22:03:28 +00:00
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AVInputFormat ff_rso_demuxer = {
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2010-07-20 14:13:24 +00:00
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.name = "rso",
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2012-07-24 21:51:41 +00:00
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.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"),
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2010-07-20 14:13:24 +00:00
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.extensions = "rso",
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.read_header = rso_read_header,
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.read_packet = rso_read_packet,
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2012-02-15 09:28:39 +00:00
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.read_seek = ff_pcm_read_seek,
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2010-07-20 14:13:24 +00:00
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.codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0},
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};
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