1 /*

     2  * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)

     3  *

     4  * This file is part of Libav.

     5  *

     6  * Libav 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  * Libav 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 Libav; 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 output buffer, must be at

    50  *                 least AV_BASE64_SIZE(in_size)

    51  * @param in_size  size in bytes of the 'in' buffer

    52  * @return         'out' or NULL in case of error

    53  */

    54 char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);

    55 

    56 /**

    57  * Calculate the output size needed to base64-encode x bytes.

    58  */

    59 #define AV_BASE64_SIZE(x)  (((x)+2) / 3 * 4 + 1)

    60 

    61  /**

    62   * @}

    63   */

    64 

    65 #endif /* AVUTIL_BASE64_H */