| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * CCTV DAT demuxer | ||
| 3 | * | ||
| 4 | * Copyright (c) 2020 Paul B Mahol | ||
| 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/intreadwrite.h" | ||
| 24 | #include "avio_internal.h" | ||
| 25 | #include "avformat.h" | ||
| 26 | #include "demux.h" | ||
| 27 | #include "internal.h" | ||
| 28 | |||
| 29 | 7241 | static int dat_probe(const AVProbeData *p) | |
| 30 | { | ||
| 31 |
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7241 | if (p->buf_size < 0x2080) |
| 32 | 4751 | return 0; | |
| 33 | |||
| 34 |
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2490 | if (memcmp(p->buf, "luo ", 4)) |
| 35 | 2490 | return 0; | |
| 36 | |||
| 37 | ✗ | if (memcmp(p->buf + 0x1ffc, " oulliu ", 8)) | |
| 38 | ✗ | return 0; | |
| 39 | |||
| 40 | ✗ | if (!AV_RL32(p->buf + 0x2004)) | |
| 41 | ✗ | return 0; | |
| 42 | |||
| 43 | ✗ | if (memcmp(p->buf + 0x207c, " uil", 4)) | |
| 44 | ✗ | return 0; | |
| 45 | |||
| 46 | ✗ | return AVPROBE_SCORE_MAX; | |
| 47 | } | ||
| 48 | |||
| 49 | ✗ | static int dat_read_header(AVFormatContext *s) | |
| 50 | { | ||
| 51 | ✗ | s->ctx_flags |= AVFMTCTX_NOHEADER; | |
| 52 | |||
| 53 | ✗ | avio_seek(s->pb, 0x2000, SEEK_SET); | |
| 54 | |||
| 55 | ✗ | return 0; | |
| 56 | } | ||
| 57 | |||
| 58 | ✗ | static int dat_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 59 | { | ||
| 60 | ✗ | AVIOContext *pb = s->pb; | |
| 61 | int index, ret, key, stream_id, stream_index, width, height, fps, pkt_size; | ||
| 62 | ✗ | int64_t pts, pos = avio_tell(pb); | |
| 63 | |||
| 64 | ✗ | if (avio_feof(pb)) | |
| 65 | ✗ | return AVERROR_EOF; | |
| 66 | |||
| 67 | ✗ | if (avio_rb32(pb) != MKBETAG('l', 'i', 'u', ' ')) | |
| 68 | ✗ | return AVERROR_INVALIDDATA; | |
| 69 | ✗ | stream_id = avio_rl32(pb); | |
| 70 | ✗ | width = avio_rl32(pb); | |
| 71 | ✗ | height = avio_rl32(pb); | |
| 72 | ✗ | fps = avio_rl32(pb); | |
| 73 | ✗ | avio_skip(pb, 16); | |
| 74 | ✗ | key = avio_rl32(pb) == 1; | |
| 75 | ✗ | avio_skip(pb, 4); | |
| 76 | ✗ | index = avio_rl32(pb); | |
| 77 | ✗ | avio_skip(pb, 4); | |
| 78 | ✗ | pts = avio_rl64(pb); | |
| 79 | ✗ | pkt_size = avio_rl32(pb); | |
| 80 | ✗ | avio_skip(pb, 64); | |
| 81 | |||
| 82 | ✗ | if (pkt_size == 0) | |
| 83 | ✗ | return AVERROR_EOF; | |
| 84 | |||
| 85 | ✗ | for (stream_index = 0; stream_index < s->nb_streams; stream_index++) { | |
| 86 | ✗ | if (s->streams[stream_index]->id == stream_id) | |
| 87 | ✗ | break; | |
| 88 | } | ||
| 89 | |||
| 90 | ✗ | if (stream_index == s->nb_streams) { | |
| 91 | ✗ | AVStream *st = avformat_new_stream(s, NULL); | |
| 92 | |||
| 93 | ✗ | if (!st) | |
| 94 | ✗ | return AVERROR(ENOMEM); | |
| 95 | |||
| 96 | ✗ | st->id = stream_id; | |
| 97 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 98 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_H264; | |
| 99 | ✗ | st->codecpar->width = width; | |
| 100 | ✗ | st->codecpar->height = height; | |
| 101 | ✗ | avpriv_set_pts_info(st, 64, 1, fps); | |
| 102 | } | ||
| 103 | |||
| 104 | ✗ | if (index >= s->nb_streams) | |
| 105 | ✗ | av_log(s, AV_LOG_WARNING, "Stream index out of range.\n"); | |
| 106 | |||
| 107 | ✗ | ret = av_get_packet(pb, pkt, pkt_size); | |
| 108 | ✗ | if (ret < 0) | |
| 109 | ✗ | return ret; | |
| 110 | ✗ | pkt->pos = pos; | |
| 111 | ✗ | pkt->pts = pts; | |
| 112 | ✗ | pkt->stream_index = stream_index; | |
| 113 | ✗ | if (key) | |
| 114 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 115 | |||
| 116 | ✗ | return ret; | |
| 117 | } | ||
| 118 | |||
| 119 | const FFInputFormat ff_luodat_demuxer = { | ||
| 120 | .p.name = "luodat", | ||
| 121 | .p.long_name = NULL_IF_CONFIG_SMALL("Video CCTV DAT"), | ||
| 122 | .p.extensions = "dat", | ||
| 123 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 124 | .read_probe = dat_probe, | ||
| 125 | .read_header = dat_read_header, | ||
| 126 | .read_packet = dat_read_packet, | ||
| 127 | }; | ||
| 128 |