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File: src/PHPVideoToolkit/AnimatedGifTranscoderGifsicle.php

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  Classes of Oliver Lillie  >  PHP Video Toolkit  >  src/PHPVideoToolkit/AnimatedGifTranscoderGifsicle.php  >  Download  
File: src/PHPVideoToolkit/AnimatedGifTranscoderGifsicle.php
Role: Class source
Content type: text/plain
Description: Class source
Class: PHP Video Toolkit
Manipulate and convert videos with ffmpeg program
Author: By
Last change: updated copy right years and a incorrect version number
updated version number in class files
Date: 3 months ago
Size: 7,347 bytes
 

Contents

Class file image Download
<?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
     */
    
class AnimatedGifTranscoderGifsicle extends AnimatedGifTranscoderAbstract
    
{
        protected 
$_tidy_up_gifs;
        
        public function 
__construct(Config $config=null)
        {
            
parent::__construct($config);
            
            
$this->_tidy_up_gifs = array();
        }
        
        public function 
__destruct()
        {
//          tidy up any converted image to gifs.
            
if(empty($this->_tidy_up_gifs) === false)
            {
                foreach (
$this->_tidy_up_gifs as $path)
                {
                    @
unlink($path);
                }
                
$this->_tidy_up_gifs = array();
            }
        }
        
        public function 
addFrame(Image $image)
        {
            
$frame_path $image->getMediaPath();
            
$data getimagesize($frame_path);
            
//          gifsicle doesn't work with none gif images so we must convert a frame to a gif
//          if it is not a gif.
            
if($data['mime'] !== 'image/gif')
            {
                
$gif_path $this->_convertFrameToGif($frame_path);
            }
            else
            {
                
$gif_path $frame_path;
            }
            
            
array_push($this->_frames$gif_path);
            
            return 
$this;
        }
        
        protected function 
_convertFrameToGif($frame_path)
        {
            
$gif_path null;
            
//          first try with imagemagick convert as imagemaigk produces better gifs
            
if($this->_config->convert)
            {
                
$process = new ProcessBuilder('convert'$this->_config);
                
$exec $process->add($frame_path)
                                ->
add($frame_path.'.convert-convert.gif')
                                ->
getExecBuffer();
                
$exec->setBlocking(true)
                     ->
execute();
                if(
$exec->hasError() === true)
                {
                    throw new 
Exception('When attempting to convert "'.$frame_path.'" to a gif, convert encountered an error. Convert reported: '.$exec->getLastLine());
                }
                
                
$gif_path $frame_path.'.convert-convert.gif';
            }
            
//          if we still have no gif path then try with php gd.
            
if(empty($gif_path) === true)
            {
                if(
function_exists('imagegif') === false)
                {
                    throw new 
Exception('PHP GD\'s function `imagegif` is not available, as a result the frame could not be added.');
                }
                
                
$im false;
                
$data getimagesize($frame_path);
                switch(
$data['mime'])
                {
                    case 
'image/jpeg' :
                        
$im = @imagecreatefromjpeg($frame_path);
                        break;
                    case 
'image/png' :
                        
$im = @imagecreatefrompng($frame_path);
                        break;
                    case 
'image/xbm' :
                        
$im = @imagecreatefromwbmp($frame_path);
                        break;
                    case 
'image/xpm' :
                        
$im = @imagecreatefromxpm($frame_path);
                        break;
                }
                if(
$im === false)
                {
                    throw new 
Exception('Unsupported image type.');
                }
                
//              save as a gif
                
$gif_path $frame_path.'.convert-php.gif';
                if(
imagegif($im$gif_path) === false)
                {
                    throw new 
Exception('Unable to convert frame to gif using PHP GD.');
                }
                
imagedestroy($im);
            }
            
            if(empty(
$gif_path) === true)
            {
                throw new 
Exception('Unable to convert frame to gif.');
            }
            else if(
is_file($gif_path) === false)
            {
                throw new 
Exception('Unable to convert frame to gif, however the gif conversion path was set.');
            }
            else if(
filesize($gif_path) === 0)
            {
                throw new 
Exception('Unable to convert frame to gif, as a gif was produced, however it was a zero byte file.');
            }
            
            
array_push($this->_tidy_up_gifs$gif_path);
            
            return 
$gif_path;
        }
        
        
/**
         * 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)
        {
            
parent::save($save_path$frame_delay);
            
//          build the gifsicle process
            
$gifsicle_process = new ProcessBuilder('gifsicle'$this->_config);
            
//          add in all the frames
            
foreach ($this->_frames as $path)
            {
                
$gifsicle_process->add($path);
            }
            
//          set the looping count
            
if($this->_loop_count === AnimatedGif::UNLIMITED_LOOPS)
            {
                
$gifsicle_process->add('-l');
            }
            else
            {
                
$gifsicle_process->add('-l')->add($this->_loop_count);
            }
            
//          set the frame duration
            //$gifsicle_process->add('-d')->add($frame_delay*1000);

//          add the output path
            
$gifsicle_process->add('-o')->add($save_path);
            
//          execute the process.
            
$exec $gifsicle_process->getExecBuffer();
            
$exec->setBlocking(true)
                 ->
execute();
            
            
$this->__destruct();

//          check for any gifsicle errors
            
if($exec->hasError() === true)
            {
                throw new 
FfmpegProcessPostProcessException('AnimatedGif save using `gifsicle` save "'.$save_path.'" failed. Any additional gifsicle message follows: 
'
.$exec->getBuffer());
            }
            
            return new 
Image($save_path$this->_config);
        }
        
        public static function 
available(Config $config)
        {
            if(
$config->gifsicle === null)
            {
                return 
false;
            }
            
            try
            {
                
Binary::locate($config->gifsicle);
                return 
true;
            }
            catch(
Excetion $e)
            {
                return 
false;
            }
        }
        
    }