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/libavutil/base64.h

http://github.com/FFmpeg/FFmpeg
C Header | 72 lines | 8 code | 9 blank | 55 comment | 0 complexity | 6a44a47f485bfb0998ecf757f40d9267 MD5 | raw file
 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 * Decode a base64-encoded string.
34 *
35 * @param out      buffer for decoded data
36 * @param in       null-terminated input string
37 * @param out_size size in bytes of the out buffer, must be at
38 *                 least 3/4 of the length of in, that is AV_BASE64_DECODE_SIZE(strlen(in))
39 * @return         number of bytes written, or a negative value in case of
40 *                 invalid input
41 */
42int av_base64_decode(uint8_t *out, const char *in, int out_size);
43
44/**
45 * Calculate the output size in bytes needed to decode a base64 string
46 * with length x to a data buffer.
47 */
48#define AV_BASE64_DECODE_SIZE(x) ((x) * 3LL / 4)
49
50/**
51 * Encode data to base64 and null-terminate.
52 *
53 * @param out      buffer for encoded data
54 * @param out_size size in bytes of the out buffer (including the
55 *                 null terminator), must be at least AV_BASE64_SIZE(in_size)
56 * @param in       input buffer containing the data to encode
57 * @param in_size  size in bytes of the in buffer
58 * @return         out or NULL in case of error
59 */
60char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
61
62/**
63 * Calculate the output size needed to base64-encode x bytes to a
64 * null-terminated string.
65 */
66#define AV_BASE64_SIZE(x)  (((x)+2) / 3 * 4 + 1)
67
68 /**
69  * @}
70  */
71
72#endif /* AVUTIL_BASE64_H */