<?php
/**
* This file is part of the PHP Video Toolkit v2 package.
*
* @author Oliver Lillie (aka buggedcom) <publicmail@buggedcom.co.uk>
* @license Dual licensed under MIT and GPLv2
* @copyright Copyright (c) 2008-2014 Oliver Lillie <http://www.buggedcom.co.uk>
* @package PHPVideoToolkit V2
* @version 2.1.7-beta
* @uses ffmpeg http://ffmpeg.sourceforge.net/
*/
namespace PHPVideoToolkit;
/**
* This class provides generic data parsing for the output from FFmpeg.
*
* @access public
* @author Oliver Lillie
* @author Jorrit Schippers
* @package default
*/
class Parser extends ParserAbstract
{
/**
* Checks to see if ffmpeg is available.
*
* @access public
* @author Oliver Lillie
* @param boolean $read_from_cache
* @return boolean
*/
public function isAvailable($read_from_cache=true)
{
$cache_key = 'ffmpeg_available';
if($read_from_cache === true && ($data = $this->_cacheGet($cache_key, -1)) !== -1)
{
return $data;
}
$raw_data = $this->getRawFfmpegData($read_from_cache);
$data = strpos($raw_data, 'not found') === false && strpos($raw_data, 'No such file or directory') === false;
$this->_cacheSet($cache_key, $data);
return $data;
}
/**
* Returns the raw data returned from ffmpeg empty function call.
*
* @access public
* @author Oliver Lillie
* @param boolean $read_from_cache
* @return string
*/
public function getRawFfmpegData($read_from_cache=true)
{
$cache_key = 'ffmpeg_raw_data';
if($read_from_cache === true && ($data = $this->_cacheGet($cache_key, -1)) !== -1)
{
return $data;
}
$exec = new FfmpegProcess('ffmpeg', $this->_config);
$data = $exec->execute()
->getBuffer();
// purposley no error checking here as ffmpeg gives an error with no input given.
$this->_cacheSet($cache_key, $data);
return $data;
}
/**
* Returns the raw data returned from ffmpeg about the available supported formats.
*
* @access public
* @author Oliver Lillie
* @param boolean $read_from_cache
* @return string
*/
public function getRawFormatData($read_from_cache=true)
{
$cache_key = 'ffmpeg_raw_formats_data';
if($read_from_cache === true && ($data = $this->_cacheGet($cache_key, -1)) !== -1)
{
return $data;
}
$exec = new FfmpegProcess('ffmpeg', $this->_config);
$data = $exec->addCommand('-formats')
->execute()
->getBuffer();
// check the process for any errors.
if($exec->hasError() === true)
{
throw new FfmpegProcessException('An error was encountered with FFmpeg when attempting to read the formats that FFmpeg supports. FFmpeg reported: '.$exec->getLastLine(), null, $exec);
}
$this->_cacheSet($cache_key, $data);
return $data;
}
}
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