| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * LVF demuxer | ||
| 3 | * Copyright (c) 2012 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/attributes.h" | ||
| 23 | #include "libavutil/intreadwrite.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "riff.h" | ||
| 27 | |||
| 28 | 7480 | static int lvf_probe(const AVProbeData *p) | |
| 29 | { | ||
| 30 |
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7480 | if (AV_RL32(p->buf) != MKTAG('L', 'V', 'F', 'F')) |
| 31 | 7480 | return 0; | |
| 32 | |||
| 33 | ✗ | if (!AV_RL32(p->buf + 16) || AV_RL32(p->buf + 16) > 256) | |
| 34 | ✗ | return AVPROBE_SCORE_MAX / 8; | |
| 35 | |||
| 36 | ✗ | return AVPROBE_SCORE_EXTENSION; | |
| 37 | } | ||
| 38 | |||
| 39 | ✗ | static int lvf_read_header(AVFormatContext *s) | |
| 40 | { | ||
| 41 | AVStream *st; | ||
| 42 | int64_t next_offset; | ||
| 43 | unsigned size, nb_streams, id; | ||
| 44 | |||
| 45 | ✗ | avio_skip(s->pb, 16); | |
| 46 | ✗ | nb_streams = avio_rl32(s->pb); | |
| 47 | ✗ | if (!nb_streams) | |
| 48 | ✗ | return AVERROR_INVALIDDATA; | |
| 49 | ✗ | if (nb_streams > 2) { | |
| 50 | ✗ | avpriv_request_sample(s, "%d streams", nb_streams); | |
| 51 | ✗ | return AVERROR_PATCHWELCOME; | |
| 52 | } | ||
| 53 | |||
| 54 | ✗ | avio_skip(s->pb, 1012); | |
| 55 | |||
| 56 | ✗ | while (!avio_feof(s->pb)) { | |
| 57 | ✗ | id = avio_rl32(s->pb); | |
| 58 | ✗ | size = avio_rl32(s->pb); | |
| 59 | ✗ | next_offset = avio_tell(s->pb) + size; | |
| 60 | |||
| 61 | ✗ | switch (id) { | |
| 62 | ✗ | case MKTAG('0', '0', 'f', 'm'): | |
| 63 | ✗ | st = avformat_new_stream(s, 0); | |
| 64 | ✗ | if (!st) | |
| 65 | ✗ | return AVERROR(ENOMEM); | |
| 66 | |||
| 67 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 68 | ✗ | avio_skip(s->pb, 4); | |
| 69 | ✗ | st->codecpar->width = avio_rl32(s->pb); | |
| 70 | ✗ | st->codecpar->height = avio_rl32(s->pb); | |
| 71 | ✗ | avio_skip(s->pb, 4); | |
| 72 | ✗ | st->codecpar->codec_tag = avio_rl32(s->pb); | |
| 73 | ✗ | st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, | |
| 74 | ✗ | st->codecpar->codec_tag); | |
| 75 | ✗ | avpriv_set_pts_info(st, 32, 1, 1000); | |
| 76 | ✗ | break; | |
| 77 | ✗ | case MKTAG('0', '1', 'f', 'm'): | |
| 78 | ✗ | st = avformat_new_stream(s, 0); | |
| 79 | ✗ | if (!st) | |
| 80 | ✗ | return AVERROR(ENOMEM); | |
| 81 | |||
| 82 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 83 | ✗ | st->codecpar->codec_tag = avio_rl16(s->pb); | |
| 84 | ✗ | st->codecpar->ch_layout.nb_channels = avio_rl16(s->pb); | |
| 85 | ✗ | st->codecpar->sample_rate = avio_rl16(s->pb); | |
| 86 | ✗ | avio_skip(s->pb, 8); | |
| 87 | ✗ | st->codecpar->bits_per_coded_sample = avio_r8(s->pb); | |
| 88 | ✗ | st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, | |
| 89 | ✗ | st->codecpar->codec_tag); | |
| 90 | ✗ | avpriv_set_pts_info(st, 32, 1, 1000); | |
| 91 | ✗ | break; | |
| 92 | ✗ | case 0: | |
| 93 | ✗ | avio_seek(s->pb, 2048 + 8, SEEK_SET); | |
| 94 | ✗ | return 0; | |
| 95 | ✗ | default: | |
| 96 | ✗ | avpriv_request_sample(s, "id %d", id); | |
| 97 | ✗ | return AVERROR_PATCHWELCOME; | |
| 98 | } | ||
| 99 | |||
| 100 | ✗ | avio_seek(s->pb, next_offset, SEEK_SET); | |
| 101 | } | ||
| 102 | |||
| 103 | ✗ | return AVERROR_EOF; | |
| 104 | } | ||
| 105 | |||
| 106 | ✗ | static int lvf_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 107 | { | ||
| 108 | unsigned size, flags, timestamp, id; | ||
| 109 | int64_t pos; | ||
| 110 | ✗ | int ret, is_video = 0; | |
| 111 | int stream_index; | ||
| 112 | |||
| 113 | ✗ | pos = avio_tell(s->pb); | |
| 114 | ✗ | while (!avio_feof(s->pb)) { | |
| 115 | ✗ | id = avio_rl32(s->pb); | |
| 116 | ✗ | size = avio_rl32(s->pb); | |
| 117 | |||
| 118 | ✗ | if (size == 0xFFFFFFFFu) | |
| 119 | ✗ | return AVERROR_EOF; | |
| 120 | |||
| 121 | ✗ | switch (id) { | |
| 122 | ✗ | case MKTAG('0', '0', 'd', 'c'): | |
| 123 | ✗ | is_video = 1; | |
| 124 | av_fallthrough; | ||
| 125 | ✗ | case MKTAG('0', '1', 'w', 'b'): | |
| 126 | ✗ | if (size < 8) | |
| 127 | ✗ | return AVERROR_INVALIDDATA; | |
| 128 | ✗ | stream_index = is_video ? 0 : 1; | |
| 129 | ✗ | if (stream_index >= s->nb_streams) | |
| 130 | ✗ | return AVERROR_INVALIDDATA; | |
| 131 | ✗ | timestamp = avio_rl32(s->pb); | |
| 132 | ✗ | flags = avio_rl32(s->pb); | |
| 133 | ✗ | ret = av_get_packet(s->pb, pkt, size - 8); | |
| 134 | ✗ | if (flags & (1 << 12)) | |
| 135 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 136 | ✗ | pkt->stream_index = stream_index; | |
| 137 | ✗ | pkt->pts = timestamp; | |
| 138 | ✗ | pkt->pos = pos; | |
| 139 | ✗ | return ret; | |
| 140 | ✗ | default: | |
| 141 | ✗ | ret = avio_skip(s->pb, size); | |
| 142 | } | ||
| 143 | |||
| 144 | ✗ | if (ret < 0) | |
| 145 | ✗ | return ret; | |
| 146 | } | ||
| 147 | |||
| 148 | ✗ | return AVERROR_EOF; | |
| 149 | } | ||
| 150 | |||
| 151 | const FFInputFormat ff_lvf_demuxer = { | ||
| 152 | .p.name = "lvf", | ||
| 153 | .p.long_name = NULL_IF_CONFIG_SMALL("LVF"), | ||
| 154 | .p.extensions = "lvf", | ||
| 155 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 156 | .read_probe = lvf_probe, | ||
| 157 | .read_header = lvf_read_header, | ||
| 158 | .read_packet = lvf_read_packet, | ||
| 159 | }; | ||
| 160 |