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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * RSO demuxer |
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| 3 | * Copyright (c) 2001 Fabrice Bellard (original AU code) |
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| 4 | * Copyright (c) 2010 Rafael Carre |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "libavutil/channel_layout.h" |
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| 24 | #include "libavutil/intreadwrite.h" |
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| 25 | #include "avformat.h" |
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| 26 | #include "internal.h" |
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| 27 | #include "pcm.h" |
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| 28 | #include "rso.h" |
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| 29 | |||
| 30 | static int rso_read_header(AVFormatContext *s) |
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| 31 | { |
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| 32 | AVIOContext *pb = s->pb; |
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| 33 | int id, rate, bps; |
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| 34 | unsigned int size; |
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| 35 | enum AVCodecID codec; |
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| 36 | AVStream *st; |
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| 37 | |||
| 38 | id = avio_rb16(pb); |
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| 39 | size = avio_rb16(pb); |
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| 40 | rate = avio_rb16(pb); |
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| 41 | avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */ |
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| 42 | |||
| 43 | codec = ff_codec_get_id(ff_codec_rso_tags, id); |
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| 44 | |||
| 45 | if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) { |
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| 46 | avpriv_report_missing_feature(s, "ADPCM in RSO"); |
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| 47 | return AVERROR_PATCHWELCOME; |
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| 48 | } |
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| 49 | |||
| 50 | bps = av_get_bits_per_sample(codec); |
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| 51 | if (!bps) { |
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| 52 | avpriv_request_sample(s, "Unknown bits per sample"); |
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| 53 | return AVERROR_PATCHWELCOME; |
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| 54 | } |
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| 55 | |||
| 56 | /* now we are ready: build format streams */ |
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| 57 | st = avformat_new_stream(s, NULL); |
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| 58 | if (!st) |
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| 59 | return AVERROR(ENOMEM); |
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| 60 | |||
| 61 | st->duration = (size * 8) / bps; |
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| 62 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 63 | st->codec->codec_tag = id; |
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| 64 | st->codec->codec_id = codec; |
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| 65 | st->codec->channels = 1; |
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| 66 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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| 67 | st->codec->sample_rate = rate; |
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| 68 | st->codec->block_align = 1; |
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| 69 | |||
| 70 | avpriv_set_pts_info(st, 64, 1, rate); |
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| 71 | |||
| 72 | return 0; |
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| 73 | } |
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| 74 | |||
| 75 | AVInputFormat ff_rso_demuxer = { |
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| 76 | .name = "rso", |
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| 77 | .long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), |
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| 78 | .extensions = "rso", |
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| 79 | .read_header = rso_read_header, |
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| 80 | .read_packet = ff_pcm_read_packet, |
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| 81 | .read_seek = ff_pcm_read_seek, |
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| 82 | .codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0}, |
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| 83 | }; |