| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Bonk demuxer | ||
| 3 | * Copyright (c) 2016 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 "id3v2.h" | ||
| 28 | #include "rawdec.h" | ||
| 29 | |||
| 30 | 8064 | static int bonk_probe(const AVProbeData *p) | |
| 31 | { | ||
| 32 |
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493001170 | for (int i = 0; i < p->buf_size - 22; i++) { |
| 33 |
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492993106 | if (!p->buf[i] && AV_RL32(p->buf + i + 1) == MKTAG('B','O','N','K')) { |
| 34 | ✗ | if (p->buf[i + 5]) | |
| 35 | ✗ | return 0; | |
| 36 | ✗ | if (AV_RL32(p->buf + i + 6) == 0) | |
| 37 | ✗ | return 0; | |
| 38 | ✗ | if (AV_RL32(p->buf + i + 10) == 0) | |
| 39 | ✗ | return 0; | |
| 40 | ✗ | if (p->buf[i + 14] == 0) | |
| 41 | ✗ | return 0; | |
| 42 | ✗ | if (AV_RL16(p->buf + i + 17) == 0 || | |
| 43 | ✗ | AV_RL16(p->buf + i + 17) > 2048) | |
| 44 | ✗ | return 0; | |
| 45 | ✗ | if (p->buf[i + 19] == 0) | |
| 46 | ✗ | return 0; | |
| 47 | ✗ | if (AV_RL16(p->buf + i + 20) == 0) | |
| 48 | ✗ | return 0; | |
| 49 | ✗ | return AVPROBE_SCORE_MAX; | |
| 50 | } | ||
| 51 | } | ||
| 52 | |||
| 53 | 8064 | return 0; | |
| 54 | } | ||
| 55 | |||
| 56 | ✗ | static int bonk_read_header(AVFormatContext *s) | |
| 57 | { | ||
| 58 | ID3v2ExtraMeta *extra_meta; | ||
| 59 | AVStream *st; | ||
| 60 | int ret; | ||
| 61 | |||
| 62 | ✗ | while (!avio_feof(s->pb)) { | |
| 63 | ✗ | const int b = avio_r8(s->pb); | |
| 64 | ✗ | if (!b) { | |
| 65 | uint32_t t; | ||
| 66 | ✗ | ret = ffio_ensure_seekback(s->pb, 3); | |
| 67 | ✗ | if (ret < 0) | |
| 68 | ✗ | return ret; | |
| 69 | |||
| 70 | ✗ | t = avio_rl32(s->pb); | |
| 71 | ✗ | if (t == MKTAG('B','O','N','K')) { | |
| 72 | ✗ | break; | |
| 73 | ✗ | } else if (t == MKTAG(' ','I','D','3')) { | |
| 74 | ✗ | avio_seek(s->pb, -3, SEEK_CUR); | |
| 75 | ✗ | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &extra_meta, 0); | |
| 76 | ✗ | if (extra_meta) { | |
| 77 | ✗ | ff_id3v2_parse_apic(s, extra_meta); | |
| 78 | ✗ | ff_id3v2_parse_priv(s, extra_meta); | |
| 79 | ✗ | ff_id3v2_free_extra_meta(&extra_meta); | |
| 80 | } | ||
| 81 | ✗ | avio_skip(s->pb, 8); | |
| 82 | } else { | ||
| 83 | ✗ | return AVERROR_INVALIDDATA; | |
| 84 | } | ||
| 85 | } | ||
| 86 | } | ||
| 87 | |||
| 88 | ✗ | st = avformat_new_stream(s, NULL); | |
| 89 | ✗ | if (!st) | |
| 90 | ✗ | return AVERROR(ENOMEM); | |
| 91 | ✗ | if ((ret = ff_get_extradata(s, st->codecpar, s->pb, 17)) < 0) | |
| 92 | ✗ | return ret; | |
| 93 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 94 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_BONK; | |
| 95 | ✗ | st->codecpar->sample_rate = AV_RL32(st->codecpar->extradata + 5); | |
| 96 | ✗ | st->codecpar->ch_layout.nb_channels = st->codecpar->extradata[9]; | |
| 97 | ✗ | if (st->codecpar->ch_layout.nb_channels == 0) | |
| 98 | ✗ | return AVERROR_INVALIDDATA; | |
| 99 | ✗ | st->duration = AV_RL32(st->codecpar->extradata + 1) / st->codecpar->ch_layout.nb_channels; | |
| 100 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 101 | |||
| 102 | ✗ | return 0; | |
| 103 | } | ||
| 104 | |||
| 105 | const FFInputFormat ff_bonk_demuxer = { | ||
| 106 | .p.name = "bonk", | ||
| 107 | .p.long_name = NULL_IF_CONFIG_SMALL("raw Bonk"), | ||
| 108 | .p.extensions = "bonk", | ||
| 109 | .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS, | ||
| 110 | .p.priv_class = &ff_raw_demuxer_class, | ||
| 111 | .read_probe = bonk_probe, | ||
| 112 | .read_header = bonk_read_header, | ||
| 113 | .read_packet = ff_raw_read_partial_packet, | ||
| 114 | .raw_codec_id = AV_CODEC_ID_BONK, | ||
| 115 | .priv_data_size = sizeof(FFRawDemuxerContext), | ||
| 116 | }; | ||
| 117 |