FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/tests/ogg_pages.c
Date: 2026-09-29 05:28:42
Exec Total Coverage
Lines: 29 40 72.5%
Functions: 1 1 100.0%
Branches: 18 28 64.3%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include <inttypes.h>
20 #include <stdio.h>
21 #include <string.h>
22
23 #include "libavutil/crc.h"
24 #include "libavutil/intreadwrite.h"
25
26 #define OGG_PAGE_HEADER_SIZE 27
27 #define OGG_PAGE_MAX_SIZE (OGG_PAGE_HEADER_SIZE + 255 + 255 * 255)
28
29 static uint8_t page[OGG_PAGE_MAX_SIZE];
30
31 2 int main(int argc, char **argv)
32 {
33 2 const AVCRC *crc_table = av_crc_get_table(AV_CRC_32_IEEE);
34 size_t nb_read;
35 2 long pos = 0;
36 2 int ret = 1;
37 FILE *file;
38
39
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 2 if (argc != 2) {
40 ✗ fprintf(stderr, "Usage: %s <file.ogg>\n"
41 "Print the header of every page and check its checksum.\n",
42 argv[0]);
43 ✗ return 1;
44 }
45
46 2 file = fopen(argv[1], "rb");
47
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 2 if (!file) {
48 ✗ perror(argv[1]);
49 ✗ return 1;
50 }
51
52
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 14 while ((nb_read = fread(page, 1, OGG_PAGE_HEADER_SIZE, file)) == OGG_PAGE_HEADER_SIZE) {
53 12 int nb_segments = page[26], body_size = 0, page_size;
54 uint32_t crc;
55
56
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 12 if (memcmp(page, "OggS", 4) ||
57
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 12 fread(page + OGG_PAGE_HEADER_SIZE, 1, nb_segments, file) != nb_segments) {
58 ✗ fprintf(stderr, "Invalid page at %ld\n", pos);
59 ✗ goto end;
60 }
61
62
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 60 for (int i = 0; i < nb_segments; i++)
63 48 body_size += page[OGG_PAGE_HEADER_SIZE + i];
64
65 12 page_size = OGG_PAGE_HEADER_SIZE + nb_segments + body_size;
66
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 12 if (fread(page + page_size - body_size, 1, body_size, file) != body_size) {
67 ✗ fprintf(stderr, "Truncated page at %ld\n", pos);
68 ✗ goto end;
69 }
70
71 12 crc = AV_RB32(page + 22);
72 12 AV_WB32(page + 22, 0);
73
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 12 if (av_crc(crc_table, 0, page, page_size) != crc) {
74 ✗ fprintf(stderr, "Checksum mismatch in page at %ld\n", pos);
75 ✗ goto end;
76 }
77
78 36 printf("pos=%ld serial=%"PRIu32" sequence=%"PRIu32" granule=%"PRId64
79 " flags=%c%c%c segments=%d size=%d\n",
80 12 pos, AV_RL32(page + 14), AV_RL32(page + 18),
81 12 (int64_t)AV_RL64(page + 6),
82
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 24 page[5] & 1 ? 'c' : '-', page[5] & 2 ? 'b' : '-',
83
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 12 page[5] & 4 ? 'e' : '-', nb_segments, body_size);
84
85 12 pos += page_size;
86 }
87
88
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 2 ret = nb_read || ferror(file);
89
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 2 if (ret)
90 ✗ fprintf(stderr, "Truncated page at %ld\n", pos);
91
92 2 end:
93 2 fclose(file);
94 2 return ret;
95 }
96