repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 | ||
| 30 | static 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 | ||
| 75 | AVInputFormat 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 | }; |