FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/m4vdec.c
Date: 2025-07-28 20:30:09
Exec Total Coverage
Lines: 29 30 96.7%
Functions: 1 1 100.0%
Branches: 53 56 94.6%

Line Branch Exec Source
1 /*
2 * RAW MPEG-4 video demuxer
3 * Copyright (c) 2006 Thijs Vermeir <thijs.vermeir@barco.com>
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 "avformat.h"
23 #include "rawdec.h"
24
25 #define VOS_STARTCODE 0x1B0
26 #define USER_DATA_STARTCODE 0x1B2
27 #define GOP_STARTCODE 0x1B3
28 #define VISUAL_OBJ_STARTCODE 0x1B5
29 #define VOP_STARTCODE 0x1B6
30 #define SLICE_STARTCODE 0x1B7
31 #define EXT_STARTCODE 0x1B8
32
33 7240 static int mpeg4video_probe(const AVProbeData *probe_packet)
34 {
35 7240 uint32_t temp_buffer = -1;
36 7240 int VO = 0, VOL = 0, VOP = 0, VISO = 0, res = 0;
37 7240 int res_main = 0;
38 int i;
39
40
2/2
✓ Branch 0 taken 390899404 times.
✓ Branch 1 taken 7240 times.
390906644 for (i = 0; i < probe_packet->buf_size; i++) {
41 390899404 temp_buffer = (temp_buffer << 8) + probe_packet->buf[i];
42
2/2
✓ Branch 0 taken 382491799 times.
✓ Branch 1 taken 8407605 times.
390899404 if (temp_buffer & 0xfffffe00)
43 382491799 continue;
44
2/2
✓ Branch 0 taken 7930076 times.
✓ Branch 1 taken 477529 times.
8407605 if (temp_buffer < 2)
45 7930076 continue;
46
47
2/2
✓ Branch 0 taken 192 times.
✓ Branch 1 taken 477337 times.
477529 if (temp_buffer == VOP_STARTCODE)
48 192 VOP++;
49
2/2
✓ Branch 0 taken 757 times.
✓ Branch 1 taken 476580 times.
477337 else if (temp_buffer == VISUAL_OBJ_STARTCODE)
50 757 VISO++;
51
4/4
✓ Branch 0 taken 48894 times.
✓ Branch 1 taken 427686 times.
✓ Branch 2 taken 33346 times.
✓ Branch 3 taken 15548 times.
476580 else if (temp_buffer >= 0x100 && temp_buffer < 0x120)
52 33346 VO++;
53
4/4
✓ Branch 0 taken 15548 times.
✓ Branch 1 taken 427686 times.
✓ Branch 2 taken 1388 times.
✓ Branch 3 taken 14160 times.
443234 else if (temp_buffer >= 0x120 && temp_buffer < 0x130)
54 1388 VOL++;
55
4/4
✓ Branch 0 taken 441746 times.
✓ Branch 1 taken 100 times.
✓ Branch 2 taken 269 times.
✓ Branch 3 taken 441477 times.
441846 else if (temp_buffer == SLICE_STARTCODE || temp_buffer == EXT_STARTCODE)
56 369 res_main++;
57
6/6
✓ Branch 0 taken 6262 times.
✓ Branch 1 taken 435215 times.
✓ Branch 2 taken 5642 times.
✓ Branch 3 taken 620 times.
✓ Branch 4 taken 5633 times.
✓ Branch 5 taken 435224 times.
441477 else if (!(0x1AF < temp_buffer && temp_buffer < 0x1B7) &&
58
2/2
✓ Branch 0 taken 4952 times.
✓ Branch 1 taken 681 times.
5633 !(0x1B9 < temp_buffer && temp_buffer < 0x1C4))
59 440176 res++;
60 }
61
62 // res_main repesents the reserved codes within the "main" profile, they are
63 // added to the reserved ones if it appears that this is a "main" profile
64 // stream
65
3/4
✓ Branch 0 taken 270 times.
✓ Branch 1 taken 6970 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 270 times.
7240 if (res_main && 2*res_main < VOP)
66 res += res_main;
67
68
9/10
✓ Branch 0 taken 7005 times.
✓ Branch 1 taken 235 times.
✓ Branch 2 taken 6437 times.
✓ Branch 3 taken 568 times.
✓ Branch 4 taken 6437 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 66 times.
✓ Branch 7 taken 6371 times.
✓ Branch 8 taken 57 times.
✓ Branch 9 taken 9 times.
7240 if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res == 0)
69
2/2
✓ Branch 0 taken 9 times.
✓ Branch 1 taken 48 times.
57 return VOP+VO > 4 ? AVPROBE_SCORE_EXTENSION : AVPROBE_SCORE_EXTENSION/2;
70
71
9/10
✓ Branch 0 taken 6948 times.
✓ Branch 1 taken 235 times.
✓ Branch 2 taken 6380 times.
✓ Branch 3 taken 568 times.
✓ Branch 4 taken 6380 times.
✗ Branch 5 not taken.
✓ Branch 6 taken 9 times.
✓ Branch 7 taken 6371 times.
✓ Branch 8 taken 4 times.
✓ Branch 9 taken 5 times.
7183 if (VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && VOP+VO > 4)
72 4 return AVPROBE_SCORE_EXTENSION/10;
73 7179 return 0;
74 }
75
76 FF_DEF_RAWVIDEO_DEMUXER2(m4v, "raw MPEG-4 video", mpeg4video_probe, "m4v",
77 AV_CODEC_ID_MPEG4, AVFMT_GENERIC_INDEX | AVFMT_TS_DISCONT)
78