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81 lines
3.0 KiB
81 lines
3.0 KiB
2 years ago
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_FILE_H
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#define AVUTIL_FILE_H
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#include <stddef.h>
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#include <stdint.h>
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#include "version.h"
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#include "attributes.h"
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/**
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* @file
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* Misc file utilities.
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*/
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/**
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* Read the file with name filename, and put its content in a newly
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* allocated buffer or map it with mmap() when available.
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* In case of success set *bufptr to the read or mmapped buffer, and
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* *size to the size in bytes of the buffer in *bufptr.
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* Unlike mmap this function succeeds with zero sized files, in this
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* case *bufptr will be set to NULL and *size will be set to 0.
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* The returned buffer must be released with av_file_unmap().
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*
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* @param filename path to the file
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* @param[out] bufptr pointee is set to the mapped or allocated buffer
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* @param[out] size pointee is set to the size in bytes of the buffer
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* @param log_offset loglevel offset used for logging
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* @param log_ctx context used for logging
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* @return a non negative number in case of success, a negative value
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* corresponding to an AVERROR error code in case of failure
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*/
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av_warn_unused_result
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int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
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int log_offset, void *log_ctx);
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/**
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* Unmap or free the buffer bufptr created by av_file_map().
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*
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* @param bufptr the buffer previously created with av_file_map()
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* @param size size in bytes of bufptr, must be the same as returned
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* by av_file_map()
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*/
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void av_file_unmap(uint8_t *bufptr, size_t size);
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#if FF_API_AV_FOPEN_UTF8
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/**
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* Wrapper to work around the lack of mkstemp() on mingw.
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* Also, tries to create file in /tmp first, if possible.
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* *prefix can be a character constant; *filename will be allocated internally.
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* @return file descriptor of opened file (or negative value corresponding to an
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* AVERROR code on error)
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* and opened file name in **filename.
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* @note On very old libcs it is necessary to set a secure umask before
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* calling this, av_tempfile() can't call umask itself as it is used in
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* libraries and could interfere with the calling application.
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* @deprecated as fd numbers cannot be passed saftely between libs on some platforms
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*/
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attribute_deprecated
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int av_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx);
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#endif
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#endif /* AVUTIL_FILE_H */
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