1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* Copyright (c) 2010 Mans Rullgard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include "libavutil/avstring.h"
#include "libavutil/md5.h"
#include "libavutil/mem.h"
#include "libavutil/error.h"
#include "avformat.h"
#include "avio.h"
#define PRIV_SIZE 128
static int md5_open(URLContext *h, const char *filename, int flags)
{
if (PRIV_SIZE < av_md5_size) {
av_log(NULL, AV_LOG_ERROR, "Insuffient size for MD5 context\n");
return -1;
}
if (flags != URL_WRONLY)
return AVERROR(EINVAL);
av_md5_init(h->priv_data);
return 0;
}
static int md5_write(URLContext *h, const unsigned char *buf, int size)
{
av_md5_update(h->priv_data, buf, size);
return size;
}
static int md5_close(URLContext *h)
{
const char *filename = h->filename;
uint8_t md5[16], buf[64];
URLContext *out;
int i, err = 0;
av_md5_final(h->priv_data, md5);
for (i = 0; i < sizeof(md5); i++)
snprintf(buf + i*2, 3, "%02x", md5[i]);
buf[i*2] = '\n';
av_strstart(filename, "md5:", &filename);
if (*filename) {
err = url_open(&out, filename, URL_WRONLY);
if (err)
return err;
err = url_write(out, buf, i*2+1);
url_close(out);
} else {
if (fwrite(buf, 1, i*2+1, stdout) < i*2+1)
err = AVERROR(errno);
}
return err;
}
static int md5_get_handle(URLContext *h)
{
return (intptr_t)h->priv_data;
}
URLProtocol md5_protocol = {
.name = "md5",
.url_open = md5_open,
.url_write = md5_write,
.url_close = md5_close,
.url_get_file_handle = md5_get_handle,
.priv_data_size = PRIV_SIZE,
};
|
