FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/iv8.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 49 53 92.5%
Functions: 3 3 100.0%
Branches: 22 28 78.6%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2009 Michael Niedermayer
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
24
25 6782 static int probe(const AVProbeData *p)
26 {
27 // the single file I have starts with that, I do not know if others do, too
28
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6782 if( p->buf[0] == 1
29
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29 && p->buf[1] == 1
30
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4 && p->buf[2] == 3
31
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1 && p->buf[3] == 0xB8
32
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1 && p->buf[4] == 0x80
33
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1 && p->buf[5] == 0x60
34 )
35 1 return AVPROBE_SCORE_MAX-2;
36
37 6781 return 0;
38 }
39
40 1 static int read_header(AVFormatContext *s)
41 {
42 AVStream *st;
43
44 1 st = avformat_new_stream(s, NULL);
45
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1 if (!st)
46 return AVERROR(ENOMEM);
47
48 1 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
49 1 st->codecpar->codec_id = AV_CODEC_ID_MPEG4;
50 1 ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL;
51 1 avpriv_set_pts_info(st, 64, 1, 90000);
52
53 1 return 0;
54
55 }
56
57 27 static int read_packet(AVFormatContext *s, AVPacket *pkt)
58 {
59 int ret, size, pts, type, flags;
60 27 int first_pkt = 0;
61 27 int frame_complete = 0;
62
63
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569 while (!frame_complete) {
64
65 545 type = avio_rb16(s->pb); // 257 or 258
66 545 size = avio_rb16(s->pb);
67 545 flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
68 545 avio_rb16(s->pb); //packet number
69 545 pts = avio_rb32(s->pb);
70 545 avio_rb32(s->pb); //6A 13 E3 88
71
72 545 frame_complete = flags & 0x80;
73
74 545 size -= 12;
75
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545 if (size < 1)
76 2 return -1;
77
78
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543 if (type == 258) {
79 1 avio_skip(s->pb, size);
80 1 frame_complete = 0;
81 1 continue;
82 }
83
84
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542 if (!first_pkt) {
85 25 ret = av_get_packet(s->pb, pkt, size);
86
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25 if (ret < 0)
87 return ret;
88 25 first_pkt = 1;
89 25 pkt->pts = pts;
90 25 pkt->pos -= 16;
91 } else {
92 517 ret = av_append_packet(s->pb, pkt, size);
93
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517 if (ret < 0) {
94 av_log(s, AV_LOG_ERROR, "failed to grow packet\n");
95 return ret;
96 }
97 }
98
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542 if (ret < size) {
99 1 av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n",
100 ret, size);
101 1 pkt->flags |= AV_PKT_FLAG_CORRUPT;
102 1 break;
103 }
104 }
105 25 pkt->stream_index = 0;
106
107 25 return 0;
108 }
109
110 const AVInputFormat ff_iv8_demuxer = {
111 .name = "iv8",
112 .long_name = NULL_IF_CONFIG_SMALL("IndigoVision 8000 video"),
113 .read_probe = probe,
114 .read_header = read_header,
115 .read_packet = read_packet,
116 .flags = AVFMT_GENERIC_INDEX,
117 };
118