<?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 2.1.1
* @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
*/
abstract class AnimatedGifTranscoderAbstract//implements AnimatedGifTranscoderInterface
{
protected $_config;
protected $_frames;
protected $_loop_count;
public function __construct(Config $config=null)
{
$this->_config = $config === null ? Config::getInstance() : $config;
$this->_frames = array();
$this->_loop_count = AnimatedGif::UNLIMITED_LOOPS;
}
/**
* Adds a frame to the current timeline.
*
* @access public
* @author Oliver Lillie
* @param string $file_path
* @param string $frame_delay
* @return boolean
*/
public function addFrame(Image $image)
{
array_push($this->_frames, $image->getMediaPath());
return $this;
}
/**
* Adds a frame to the current timeline.
*
* @access public
* @author Oliver Lillie
* @param string $file_path
* @param string $frame_delay
* @return boolean
*/
public function setLoopCount($loop_count)
{
if($loop_count !== null && $loop_count < -1)
{
throw new Exception('The loop count cannot be less than -1. (-1 specifies unlimited looping)');
}
$this->_loop_count = (int) $loop_count;
return $this;
}
/**
* Saves the animated gif.
*
* @access public
* @author Oliver Lillie
* @param string $save_path
* @param float $frame_delay The delay of each frame.
* @return Image
*/
public function save($save_path, $frame_delay=0.1)
{
if(empty($this->_frames) === true)
{
throw new Exception('At least one frame must be added in order to save an animated gif.');
}
if($frame_delay < 0.001)
{
throw new Exception('The frame delay must at least be 0.001.');
}
if(is_file($save_path) === true)
{
throw new Exception('The save path "'.$save_path.'" already exists.');
}
}
}
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