| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * OSQ demuxer | ||
| 3 | * Copyright (c) 2023 Paul B Mahol | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "libavutil/intreadwrite.h" | ||
| 23 | #include "avio_internal.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "rawdec.h" | ||
| 28 | |||
| 29 | 7186 | static int osq_probe(const AVProbeData *p) | |
| 30 | { | ||
| 31 |
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7186 | if (AV_RL32(p->buf) != MKTAG('O','S','Q',' ')) |
| 32 | 7185 | return 0; | |
| 33 |
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1 | if (AV_RL32(p->buf + 4) != 48) |
| 34 | ✗ | return 0; | |
| 35 |
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1 | if (AV_RL16(p->buf + 8) != 1) |
| 36 | ✗ | return 0; | |
| 37 |
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1 | if (p->buf[10] == 0) |
| 38 | ✗ | return 0; | |
| 39 |
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1 | if (p->buf[11] == 0) |
| 40 | ✗ | return 0; | |
| 41 |
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1 | if (AV_RL32(p->buf + 12) == 0) |
| 42 | ✗ | return 0; | |
| 43 |
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1 | if (AV_RL16(p->buf + 16) == 0) |
| 44 | ✗ | return 0; | |
| 45 | |||
| 46 | 1 | return AVPROBE_SCORE_MAX; | |
| 47 | } | ||
| 48 | |||
| 49 | 1 | static int osq_read_header(AVFormatContext *s) | |
| 50 | { | ||
| 51 | uint32_t t, size; | ||
| 52 | AVStream *st; | ||
| 53 | int ret; | ||
| 54 | |||
| 55 | 1 | t = avio_rl32(s->pb); | |
| 56 |
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1 | if (t != MKTAG('O','S','Q',' ')) |
| 57 | ✗ | return AVERROR_INVALIDDATA; | |
| 58 | |||
| 59 | 1 | size = avio_rl32(s->pb); | |
| 60 |
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1 | if (size != 48) |
| 61 | ✗ | return AVERROR_INVALIDDATA; | |
| 62 | |||
| 63 | 1 | st = avformat_new_stream(s, NULL); | |
| 64 |
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1 | if (!st) |
| 65 | ✗ | return AVERROR(ENOMEM); | |
| 66 |
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1 | if ((ret = ff_get_extradata(s, st->codecpar, s->pb, size)) < 0) |
| 67 | ✗ | return ret; | |
| 68 | |||
| 69 | 1 | t = avio_rl32(s->pb); | |
| 70 |
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1 | if (t != MKTAG('R','I','F','F')) |
| 71 | ✗ | return AVERROR_INVALIDDATA; | |
| 72 | 1 | avio_skip(s->pb, 8); | |
| 73 | |||
| 74 | 1 | t = avio_rl32(s->pb); | |
| 75 |
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1 | if (t != MKTAG('f','m','t',' ')) |
| 76 | ✗ | return AVERROR_INVALIDDATA; | |
| 77 | 1 | size = avio_rl32(s->pb); | |
| 78 | 1 | avio_skip(s->pb, size); | |
| 79 | |||
| 80 | 1 | t = avio_rl32(s->pb); | |
| 81 | 1 | size = avio_rl32(s->pb); | |
| 82 |
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2 | while (t != MKTAG('d','a','t','a')) { |
| 83 | 1 | avio_skip(s->pb, size); | |
| 84 | |||
| 85 | 1 | t = avio_rl32(s->pb); | |
| 86 | 1 | size = avio_rl32(s->pb); | |
| 87 |
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1 | if (avio_feof(s->pb)) |
| 88 | ✗ | return AVERROR_INVALIDDATA; | |
| 89 | } | ||
| 90 | |||
| 91 | 1 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 92 | 1 | st->codecpar->codec_id = AV_CODEC_ID_OSQ; | |
| 93 | 1 | st->codecpar->sample_rate = AV_RL32(st->codecpar->extradata + 4); | |
| 94 |
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1 | if (st->codecpar->sample_rate <= 0) |
| 95 | ✗ | return AVERROR_INVALIDDATA; | |
| 96 | 1 | st->codecpar->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC; | |
| 97 | 1 | st->codecpar->ch_layout.nb_channels = st->codecpar->extradata[3]; | |
| 98 |
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1 | if (st->codecpar->ch_layout.nb_channels == 0) |
| 99 | ✗ | return AVERROR_INVALIDDATA; | |
| 100 | 1 | st->start_time = 0; | |
| 101 | 1 | st->duration = AV_RL32(st->codecpar->extradata + 16); | |
| 102 | 1 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 103 | |||
| 104 | 1 | return 0; | |
| 105 | } | ||
| 106 | |||
| 107 | const FFInputFormat ff_osq_demuxer = { | ||
| 108 | .p.name = "osq", | ||
| 109 | .p.long_name = NULL_IF_CONFIG_SMALL("raw OSQ"), | ||
| 110 | .p.extensions = "osq", | ||
| 111 | .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS, | ||
| 112 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 113 | .read_probe = osq_probe, | ||
| 114 | .read_header = osq_read_header, | ||
| 115 | .read_packet = ff_raw_read_partial_packet, | ||
| 116 | .raw_codec_id = AV_CODEC_ID_OSQ, | ||
| 117 | .priv_data_size = sizeof(FFRawDemuxerContext), | ||
| 118 | }; | ||
| 119 |