base64.h 2.2 KB

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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. #ifndef AVUTIL_BASE64_H
  21. #define AVUTIL_BASE64_H
  22. #include <stdint.h>
  23. /**
  24. * @defgroup lavu_base64 Base64
  25. * @ingroup lavu_crypto
  26. * @{
  27. */
  28. /**
  29. * Decode a base64-encoded string.
  30. *
  31. * @param out buffer for decoded data
  32. * @param in null-terminated input string
  33. * @param out_size size in bytes of the out buffer, must be at
  34. * least 3/4 of the length of in, that is AV_BASE64_DECODE_SIZE(strlen(in))
  35. * @return number of bytes written, or a negative value in case of
  36. * invalid input
  37. */
  38. int av_base64_decode(uint8_t *out, const char *in, int out_size);
  39. /**
  40. * Calculate the output size in bytes needed to decode a base64 string
  41. * with length x to a data buffer.
  42. */
  43. #define AV_BASE64_DECODE_SIZE(x) ((x) * 3LL / 4)
  44. /**
  45. * Encode data to base64 and null-terminate.
  46. *
  47. * @param out buffer for encoded data
  48. * @param out_size size in bytes of the out buffer (including the
  49. * null terminator), must be at least AV_BASE64_SIZE(in_size)
  50. * @param in input buffer containing the data to encode
  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. * Calculate the output size needed to base64-encode x bytes to a
  57. * null-terminated string.
  58. */
  59. #define AV_BASE64_SIZE(x) (((x)+2) / 3 * 4 + 1)
  60. /**
  61. * @}
  62. */
  63. #endif /* AVUTIL_BASE64_H */