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2134
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1 /*
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2 * This file is part of FFmpeg.
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3 *
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4 * FFmpeg is free software; you can redistribute it and/or
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5 * modify it under the terms of the GNU Lesser General Public
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6 * License as published by the Free Software Foundation; either
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7 * version 2.1 of the License, or (at your option) any later version.
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8 *
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9 * FFmpeg is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 * Lesser General Public License for more details.
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13 *
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14 * You should have received a copy of the GNU Lesser General Public
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15 * License along with FFmpeg; if not, write to the Free Software
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16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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17 */
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18
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19 #ifndef AVUTIL_FILE_H
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20 #define AVUTIL_FILE_H
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21
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22 #include <stdint.h>
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23
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24 #include "avutil.h"
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25
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26 /**
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27 * @file
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28 * Misc file utilities.
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29 */
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30
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31 /**
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32 * Read the file with name filename, and put its content in a newly
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33 * allocated buffer or map it with mmap() when available.
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34 * In case of success set *bufptr to the read or mmapped buffer, and
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35 * *size to the size in bytes of the buffer in *bufptr.
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36 * The returned buffer must be released with av_file_unmap().
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37 *
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38 * @param log_offset loglevel offset used for logging
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39 * @param log_ctx context used for logging
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40 * @return a non negative number in case of success, a negative value
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41 * corresponding to an AVERROR error code in case of failure
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42 */
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43 int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
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44 int log_offset, void *log_ctx);
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45
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46 /**
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47 * Unmap or free the buffer bufptr created by av_file_map().
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48 *
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49 * @param size size in bytes of bufptr, must be the same as returned
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50 * by av_file_map()
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51 */
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52 void av_file_unmap(uint8_t *bufptr, size_t size);
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53
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54 /**
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55 * Wrapper to work around the lack of mkstemp() on mingw.
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56 * Also, tries to create file in /tmp first, if possible.
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57 * *prefix can be a character constant; *filename will be allocated internally.
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58 * @return file descriptor of opened file (or -1 on error)
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59 * and opened file name in **filename.
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60 * @note On very old libcs it is necessary to set a secure umask before
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61 * calling this, av_tempfile() cant call umask itself as it is used in
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62 * libraries and could interfere with the calling application.
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63 */
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64 int av_tempfile(const char *prefix, char **filename, int log_offset, void *log_ctx);
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65
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66 #endif /* AVUTIL_FILE_H */
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