| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (C) 2010 David Conrad | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "libavutil/intreadwrite.h" | ||
| 22 | #include "avformat.h" | ||
| 23 | #include "internal.h" | ||
| 24 | #include "oggdec.h" | ||
| 25 | |||
| 26 | ✗ | static int skeleton_header(AVFormatContext *s, int idx) | |
| 27 | { | ||
| 28 | ✗ | struct ogg *ogg = s->priv_data; | |
| 29 | ✗ | struct ogg_stream *os = ogg->streams + idx; | |
| 30 | ✗ | AVStream *st = s->streams[idx]; | |
| 31 | ✗ | uint8_t *buf = os->buf + os->pstart; | |
| 32 | int version_major, version_minor; | ||
| 33 | int64_t start_num, start_den; | ||
| 34 | uint64_t start_granule; | ||
| 35 | int target_idx, start_time; | ||
| 36 | |||
| 37 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_DATA; | |
| 38 | |||
| 39 | ✗ | if ((os->flags & OGG_FLAG_EOS) && os->psize == 0) | |
| 40 | ✗ | return 1; | |
| 41 | |||
| 42 | ✗ | if (os->psize < 8) | |
| 43 | ✗ | return -1; | |
| 44 | |||
| 45 | ✗ | if (!strncmp(buf, "fishead", 8)) { | |
| 46 | ✗ | if (os->psize < 64) | |
| 47 | ✗ | return -1; | |
| 48 | |||
| 49 | ✗ | version_major = AV_RL16(buf+8); | |
| 50 | ✗ | version_minor = AV_RL16(buf+10); | |
| 51 | |||
| 52 | ✗ | if (version_major != 3 && version_major != 4) { | |
| 53 | ✗ | av_log(s, AV_LOG_WARNING, "Unknown skeleton version %d.%d\n", | |
| 54 | version_major, version_minor); | ||
| 55 | ✗ | return -1; | |
| 56 | } | ||
| 57 | |||
| 58 | // This is the overall start time. We use it for the start time of | ||
| 59 | // of the skeleton stream since if left unset lavf assumes 0, | ||
| 60 | // which we don't want since skeleton is timeless | ||
| 61 | // FIXME: the real meaning of this field is "start playback at | ||
| 62 | // this time which can be in the middle of a packet | ||
| 63 | ✗ | start_num = AV_RL64(buf+12); | |
| 64 | ✗ | start_den = AV_RL64(buf+20); | |
| 65 | |||
| 66 | ✗ | if (start_den > 0 && start_num > 0) { | |
| 67 | int base_den; | ||
| 68 | ✗ | av_reduce(&start_time, &base_den, start_num, start_den, INT_MAX); | |
| 69 | ✗ | avpriv_set_pts_info(st, 64, 1, base_den); | |
| 70 | ✗ | os->lastpts = | |
| 71 | ✗ | st->start_time = start_time; | |
| 72 | } | ||
| 73 | ✗ | } else if (!strncmp(buf, "fisbone", 8)) { | |
| 74 | ✗ | if (os->psize < 52) | |
| 75 | ✗ | return -1; | |
| 76 | |||
| 77 | ✗ | target_idx = ogg_find_stream(ogg, AV_RL32(buf+12)); | |
| 78 | ✗ | start_granule = AV_RL64(buf+36); | |
| 79 | ✗ | if (target_idx < 0) { | |
| 80 | ✗ | av_log(s, AV_LOG_WARNING, "Serial number in fisbone doesn't match any stream\n"); | |
| 81 | ✗ | return 1; | |
| 82 | } | ||
| 83 | ✗ | os = ogg->streams + target_idx; | |
| 84 | ✗ | if (os->start_granule != OGG_NOGRANULE_VALUE) { | |
| 85 | ✗ | av_log(s, AV_LOG_WARNING, "Multiple fisbone for the same stream\n"); | |
| 86 | ✗ | return 1; | |
| 87 | } | ||
| 88 | ✗ | if (start_granule != OGG_NOGRANULE_VALUE) { | |
| 89 | ✗ | os->start_granule = start_granule; | |
| 90 | } | ||
| 91 | } | ||
| 92 | |||
| 93 | ✗ | return 1; | |
| 94 | } | ||
| 95 | |||
| 96 | const struct ogg_codec ff_skeleton_codec = { | ||
| 97 | .magic = "fishead", | ||
| 98 | .magicsize = 8, | ||
| 99 | .header = skeleton_header, | ||
| 100 | .nb_header = 0, | ||
| 101 | }; | ||
| 102 |