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().

Parameters

log_offset loglevel offset used for logging

log_ctx context used for logging

Returns

a non negative number in case of success, a negative value corresponding to an AVERROR error code in case of failure

Definition at line 49 of file file.c.

Referenced by init(), init_pattern_from_file(), lavfi_read_header(), load_textfile(), parse_psfile(), and read_shape_from_file().

Unmap or free the buffer bufptr created by av_file_map().

Parameters

size size in bytes of bufptr, must be the same as returned by av_file_map()

Definition at line 129 of file file.c.

Referenced by init(), lavfi_read_header(), load_textfile(), parse_psfile(), read_shape_from_file(), and uninit().

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.

Returns

file descriptor of opened file (or -1 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.

Definition at line 140 of file file.c.

Referenced by cache_open(), ff_xvid_rate_control_init(), and xvid_encode_init().