FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/ivfdec.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 32 35 91.4%
Functions: 3 3 100.0%
Branches: 7 12 58.3%

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 "avformat.h"
22 #include "internal.h"
23 #include "riff.h"
24 #include "libavutil/intreadwrite.h"
25
26 6782 static int probe(const AVProbeData *p)
27 {
28
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6782 if (AV_RL32(p->buf) == MKTAG('D','K','I','F')
29
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38 && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32)
30 38 return AVPROBE_SCORE_MAX-2;
31
32 6744 return 0;
33 }
34
35 39 static int read_header(AVFormatContext *s)
36 {
37 AVStream *st;
38 AVRational time_base;
39
40 39 avio_rl32(s->pb); // DKIF
41 39 avio_rl16(s->pb); // version
42 39 avio_rl16(s->pb); // header size
43
44 39 st = avformat_new_stream(s, NULL);
45
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39 if (!st)
46 return AVERROR(ENOMEM);
47
48
49 39 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
50 39 st->codecpar->codec_tag = avio_rl32(s->pb);
51 39 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codecpar->codec_tag);
52 39 st->codecpar->width = avio_rl16(s->pb);
53 39 st->codecpar->height = avio_rl16(s->pb);
54 39 time_base.den = avio_rl32(s->pb);
55 39 time_base.num = avio_rl32(s->pb);
56 39 st->duration = avio_rl32(s->pb);
57 39 avio_skip(s->pb, 4); // unused
58
59 39 ffstream(st)->need_parsing = AVSTREAM_PARSE_HEADERS;
60
61
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39 if (!time_base.den || !time_base.num) {
62 av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
63 return AVERROR_INVALIDDATA;
64 }
65
66 39 avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
67
68 39 return 0;
69 }
70
71 1289 static int read_packet(AVFormatContext *s, AVPacket *pkt)
72 {
73 1289 int ret, size = avio_rl32(s->pb);
74 1289 int64_t pts = avio_rl64(s->pb);
75
76 1289 ret = av_get_packet(s->pb, pkt, size);
77 1289 pkt->stream_index = 0;
78 1289 pkt->pts = pts;
79 1289 pkt->pos -= 12;
80
81 1289 return ret;
82 }
83
84 const AVInputFormat ff_ivf_demuxer = {
85 .name = "ivf",
86 .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
87 .read_probe = probe,
88 .read_header = read_header,
89 .read_packet = read_packet,
90 .flags = AVFMT_GENERIC_INDEX,
91 .codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 },
92 };
93