media/ffvpx/libavutil/base64.h

   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  */
  42 int 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  */
  60 char *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 */