| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "demux.h" | ||
| 27 | #include "internal.h" | ||
| 28 | #include "pcm.h" | ||
| 29 | #include "rso.h" | ||
| 30 | |||
| 31 | 1 | static int rso_read_header(AVFormatContext *s) | |
| 32 | { | ||
| 33 | 1 | AVIOContext *pb = s->pb; | |
| 34 | int id, rate, bps; | ||
| 35 | unsigned int size; | ||
| 36 | enum AVCodecID codec; | ||
| 37 | AVStream *st; | ||
| 38 | |||
| 39 | 1 | id = avio_rb16(pb); | |
| 40 | 1 | size = avio_rb16(pb); | |
| 41 | 1 | rate = avio_rb16(pb); | |
| 42 | 1 | avio_rb16(pb); /* play mode ? (0x0000 = don't loop) */ | |
| 43 | |||
| 44 | 1 | codec = ff_codec_get_id(ff_codec_rso_tags, id); | |
| 45 | |||
| 46 |
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1 | if (codec == AV_CODEC_ID_ADPCM_IMA_WAV) { |
| 47 | ✗ | avpriv_report_missing_feature(s, "ADPCM in RSO"); | |
| 48 | ✗ | return AVERROR_PATCHWELCOME; | |
| 49 | } | ||
| 50 | |||
| 51 | 1 | bps = av_get_bits_per_sample(codec); | |
| 52 |
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1 | if (!bps) { |
| 53 | ✗ | avpriv_request_sample(s, "Unknown bits per sample"); | |
| 54 | ✗ | return AVERROR_PATCHWELCOME; | |
| 55 | } | ||
| 56 | |||
| 57 | /* now we are ready: build format streams */ | ||
| 58 | 1 | st = avformat_new_stream(s, NULL); | |
| 59 |
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1 | if (!st) |
| 60 | ✗ | return AVERROR(ENOMEM); | |
| 61 | |||
| 62 | 1 | st->duration = (size * 8) / bps; | |
| 63 | 1 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 64 | 1 | st->codecpar->codec_tag = id; | |
| 65 | 1 | st->codecpar->codec_id = codec; | |
| 66 | 1 | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 67 | 1 | st->codecpar->sample_rate = rate; | |
| 68 | 1 | st->codecpar->block_align = 1; | |
| 69 | |||
| 70 | 1 | avpriv_set_pts_info(st, 64, 1, rate); | |
| 71 | |||
| 72 | 1 | return 0; | |
| 73 | } | ||
| 74 | |||
| 75 | const FFInputFormat ff_rso_demuxer = { | ||
| 76 | .p.name = "rso", | ||
| 77 | .p.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), | ||
| 78 | .p.extensions = "rso", | ||
| 79 | .p.codec_tag = ff_rso_codec_tags_list, | ||
| 80 | .read_header = rso_read_header, | ||
| 81 | .read_packet = ff_pcm_read_packet, | ||
| 82 | .read_seek = ff_pcm_read_seek, | ||
| 83 | }; | ||
| 84 |