3 * Copyright (c) 2001 Fabrice Bellard (original AU code)
4 * Copyright (c) 2010 Rafael Carre
6 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/intreadwrite.h"
31 static int rso_read_header(AVFormatContext *s)
33 AVIOContext *pb = s->pb;
42 avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */
44 codec = ff_codec_get_id(ff_codec_rso_tags, id);
46 if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) {
47 av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n");
48 return AVERROR_PATCHWELCOME;
51 bps = av_get_bits_per_sample(codec);
53 av_log_ask_for_sample(s, "could not determine bits per sample\n");
54 return AVERROR_INVALIDDATA;
57 /* now we are ready: build format streams */
58 st = avformat_new_stream(s, NULL);
60 return AVERROR(ENOMEM);
62 st->duration = (size * 8) / bps;
63 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
64 st->codec->codec_tag = id;
65 st->codec->codec_id = codec;
66 st->codec->channels = 1;
67 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
68 st->codec->sample_rate = rate;
70 avpriv_set_pts_info(st, 64, 1, rate);
75 #define BLOCK_SIZE 1024 /* in samples */
77 static int rso_read_packet(AVFormatContext *s, AVPacket *pkt)
79 int bps = av_get_bits_per_sample(s->streams[0]->codec->codec_id);
80 int ret = av_get_packet(s->pb, pkt, BLOCK_SIZE * bps >> 3);
85 pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
86 pkt->stream_index = 0;
91 AVInputFormat ff_rso_demuxer = {
93 .long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"),
95 .read_header = rso_read_header,
96 .read_packet = rso_read_packet,
97 .read_seek = ff_pcm_read_seek,
98 .codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0},