/ 
crazy-fast-media-scan-0.004
River stage zero No dependents
/ File::FormatIdentification::RandomSampling

NAME

File::FormatIdentification::RandomSampling - methods to identify files using random sampling

VERSION

version 0.004

SYNOPSIS

This module is suitable to get a good estimation about the content of media (or files). It uses random sampling of sectors to obtain heuristics about the content types.

To check the base type of a given binary string:

my $ff = File::FormatIdentification::RandomSampling->new(); # basic instantiation
my $type = $ff->calc_type($buffer); # calc type of given binary string

NAME

File::FormatIdentification::RandomSampling

SOURCE

The actual development version is available at https://art1pirat.spdns.org/art1/crazy-fast-image-scan

METHODS

init_bytegrams

resets the internal bytegram state. Also called if object will be instantiated

update_bytegram

$buffer - updates the internal bytegram states using $buffer

calc_histogram

uses the most significant first 8 bytegram entries to from a histogram, returned as hash reference

is_uniform

returns true, if 1-byte bytegrams are uniform

is_empty

returns true, if 1-byte bytegrams indicating empty buffers

is_text

returns true, if 1-byte bytegrams are typical for texts

is_video

returns true, if 1-byte bytegrams are typical for MPEG/Quicktime Videos

calc_type

returns string indicating type of a given buffer

AUTHOR

Andreas Romeyke <pause@andreas-romeyke.de>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2020 by Andreas Romeyke.

This is free software, licensed under:

The GNU General Public License, Version 3, June 2007