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  1. /*
  2.  * VorbisComment writer
  3.  * Copyright (c) 2009 James Darnley
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #ifndef AVFORMAT_VORBISCOMMENT_H
  23. #define AVFORMAT_VORBISCOMMENT_H
  24.  
  25. #include "avformat.h"
  26. #include "metadata.h"
  27.  
  28. /**
  29.  * Calculate the length in bytes of a VorbisComment. This is the minimum
  30.  * size required by ff_vorbiscomment_write().
  31.  *
  32.  * @param m The metadata structure to be parsed. For no metadata, set to NULL.
  33.  * @param vendor_string The vendor string to be added into the VorbisComment.
  34.  * For no string, set to an empty string.
  35.  * @param count Pointer to store the number of tags in m because m->count is "not allowed"
  36.  * @return The length in bytes.
  37.  */
  38. int ff_vorbiscomment_length(AVDictionary *m, const char *vendor_string,
  39.                             unsigned *count);
  40.  
  41. /**
  42.  * Write a VorbisComment into a buffer. The buffer, p, must have enough
  43.  * data to hold the whole VorbisComment. The minimum size required can be
  44.  * obtained by passing the same AVDictionary and vendor_string to
  45.  * ff_vorbiscomment_length()
  46.  *
  47.  * @param p The buffer in which to write.
  48.  * @param m The metadata struct to write.
  49.  * @param vendor_string The vendor string to write.
  50.  * @param count The number of tags in m because m->count is "not allowed"
  51.  */
  52. int ff_vorbiscomment_write(uint8_t **p, AVDictionary **m,
  53.                            const char *vendor_string, const unsigned count);
  54.  
  55. extern const AVMetadataConv ff_vorbiscomment_metadata_conv[];
  56.  
  57. #endif /* AVFORMAT_VORBISCOMMENT_H */
  58.