/* * 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 <stdint.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. * Unlike mmap this function succeeds with zero sized files, in this * case *bufptr will be set to NULL and *size will be set to 0. * 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 */ av_warn_unused_result 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 negative value corresponding to an * AVERROR code on error) * and opened file name in **filename. * @note On very old libcs it is necessary to set a secure umask before * calling this, av_tempfile() can't call umask itself as it is used in * libraries and could interfere with the calling application. * @deprecated as fd numbers cannot be passed saftely between libs on some platforms */ int av_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx); #endif /* AVUTIL_FILE_H */