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base64.h
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1 /*
2  * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
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 #ifndef AVUTIL_BASE64_H
22 #define AVUTIL_BASE64_H
23 
24 #include <stdint.h>
25 
26 /**
27  * @defgroup lavu_base64 Base64
28  * @ingroup lavu_crypto
29  * @{
30  */
31 
32 
33 /**
34  * Decode a base64-encoded string.
35  *
36  * @param out buffer for decoded data
37  * @param in null-terminated input string
38  * @param out_size size in bytes of the out buffer, must be at
39  * least 3/4 of the length of in
40  * @return number of bytes written, or a negative value in case of
41  * invalid input
42  */
43 int av_base64_decode(uint8_t *out, const char *in, int out_size);
44 
45 /**
46  * Encode data to base64 and null-terminate.
47  *
48  * @param out buffer for encoded data
49  * @param out_size size in bytes of the out buffer (including the
50  * null terminator), must be at least AV_BASE64_SIZE(in_size)
51  * @param in input buffer containing the data to encode
52  * @param in_size size in bytes of the in buffer
53  * @return out or NULL in case of error
54  */
55 char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
56 
57 /**
58  * Calculate the output size needed to base64-encode x bytes to a
59  * null-terminated string.
60  */
61 #define AV_BASE64_SIZE(x) (((x)+2) / 3 * 4 + 1)
62 
63  /**
64  * @}
65  */
66 
67 #endif /* AVUTIL_BASE64_H */