text: /*
   * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
   *
   * 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
   */
  
  #ifndef AVUTIL_BASE64_H
  #define AVUTIL_BASE64_H
  
  #include <stdint.h>
  
  /**
   * @defgroup lavu_base64 Base64
   * @ingroup lavu_crypto
   * @{
   */
  
  
  /**
   * Decode a base64-encoded string.
   *
   * @param out      buffer for decoded data
   * @param in       null-terminated input string
   * @param out_size size in bytes of the out buffer, must be at
   *                 least 3/4 of the length of in
   * @return         number of bytes written, or a negative value in case of
   *                 invalid input
   */
  int av_base64_decode(uint8_t *out, const char *in, int out_size);
  
  /**
   * Encode data to base64 and null-terminate.
   *
   * @param out      buffer for encoded data
   * @param out_size size in bytes of the out buffer (including the
   *                 null terminator), must be at least AV_BASE64_SIZE(in_size)
   * @param in       input buffer containing the data to encode
   * @param in_size  size in bytes of the in buffer
   * @return         out or NULL in case of error
   */
  char *av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size);
  
  /**
   * Calculate the output size needed to base64-encode x bytes to a
   * null-terminated string.
   */
  #define AV_BASE64_SIZE(x)  (((x)+2) / 3 * 4 + 1)
  
   /**
    * @}
    */
  
  #endif /* AVUTIL_BASE64_H */
  