text: ﻿/*
   * 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_FILE_H
  #define AVUTIL_FILE_H
  
  #include "avutil.h"
  
  /**
   * @file
   * Misc file utilities.
   */
  
  /**
   * Read the file with name filename, and put its content in a newly
   * allocated buffer or map it with mmap() when available.
   * In case of success set *bufptr to the read or mmapped buffer, and
   * *size to the size in bytes of the buffer in *bufptr.
   * The returned buffer must be released with av_file_unmap().
   *
   * @param log_offset loglevel offset used for logging
   * @param log_ctx context used for logging
   * @return a non negative number in case of success, a negative value
   * corresponding to an AVERROR error code in case of failure
   */
  int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
                  int log_offset, void *log_ctx);
  
  /**
   * Unmap or free the buffer bufptr created by av_file_map().
   *
   * @param size size in bytes of bufptr, must be the same as returned
   * by av_file_map()
   */
  void av_file_unmap(uint8_t *bufptr, size_t size);
  
  /**
   * Wrapper to work around the lack of mkstemp() on mingw.
   * Also, tries to create file in /tmp first, if possible.
   * *prefix can be a character constant; *filename will be allocated internally.
   * @return file descriptor of opened file (or -1 on error)
   * and opened file name in **filename.
   */
  int av_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx);
  
  #endif /* AVUTIL_FILE_H */
  