<?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;
/**
* @access public
* @author Oliver Lillie
* @package default
*/
class ImageFormat_Gif extends ImageFormat
{
protected $_max_frames_on_no_timecode = false;
public function __construct($input_output_type=Format::OUTPUT, Config $config=null)
{
parent::__construct($input_output_type, $config);
$this->_format = array_merge($this->_format, array(
'gif_loop_count' => AnimatedGif::UNLIMITED_LOOPS,
'gif_frame_delay' => 0.1,
));
$this->_format_to_command = array_merge($this->_format_to_command, array(
'gif_loop_count' => '',
'gif_frame_delay' => '',
));
if($input_output_type === 'output')
{
$this->disableAudio()
->setVideoCodec('gif')
->setFormat('gif');
}
$this->_restricted_audio_codecs = array();
$this->_restricted_video_codecs = array('gif');
}
public function setLoopCount($loop_count)
{
$this->_blockSetOnInputFormat('animated gif loop count');
if($loop_count === null)
{
$this->_format['gif_loop_count'] = null;
return $this;
}
if($loop_count !== null && $loop_count < -1)
{
throw new \InvalidArgumentException('The loop count cannot be less than -1. (-1 specifies unlimited looping)');
}
$this->_format['gif_loop_count'] = (int) $loop_count;
return $this;
}
public function setFrameDelay($frame_delay)
{
$this->_blockSetOnInputFormat('animated gif frame delay');
if($frame_delay === null)
{
$this->_format['gif_frame_delay'] = null;
return $this;
}
if($frame_delay !== null && $frame_delay <= 0)
{
throw new \InvalidArgumentException('The animated gif frame delay cannot be equal to or less than 0.');
}
if(is_int($frame_delay) === false && is_float($frame_delay) === false)
{
throw new \InvalidArgumentException('The animated gif frame delay value must either be an integer or a float.');
}
$this->_format['gif_frame_delay'] = $frame_delay;
return $this;
}
public function updateFormatOptions(&$save_path, $overwrite)
{
parent::updateFormatOptions($save_path, $overwrite);
// if the save path doesn't have %d in it then we are ouputing an animated gif,
// otherwise it is assumed that the output is multiple images.
// If we are going to output an animated gif we must prevent ffmpeg from doing it.
// This is because ffmpeg creates really shitty animated gifs, which is suprising.
if(preg_match('/(\%([0-9]*)?index|timecode)/', $save_path, $matches) === 0)
{
// if the frame rate has not been set, find out what it is and then set it
if(empty($this->_format['video_frame_rate']) === true)
{
$frame_rate = $this->_media_object->getFrameRate();
$this->setVideoFrameRate(floor($frame_rate));
}
// as we are outputting frames we want the png format for each frame for best possible output
$this->_restricted_video_codecs = array('png');
$this->setVideoCodec('png')
->setFormat('image2');
$this->_restricted_video_codecs = array('gif');
// update the pathway to include indexed output so that it outputs multiple frames.
$original_save_path = $save_path;
$ext = pathinfo($save_path, PATHINFO_EXTENSION);
$filename = 'phpvideotoolkit_anigif_'.Str::generateRandomAlphaString(5).'_'.basename(substr_replace($save_path, '%12index.png', -(strlen($ext)+1)));
$save_path = $this->_config->temp_directory.DIRECTORY_SEPARATOR.$filename;
// register the post process to combine the images into an animated gif
$this->_media_object->registerOutputPostProcess(array($this, 'postProcessCreateAnimatedGif'), array($original_save_path, $overwrite, $this->_format['video_frame_rate'], $this->_format['gif_loop_count'], $this->_format['gif_frame_delay']));
}
return $this;
}
public function postProcessCreateAnimatedGif(array $output, Media $media, $save_path, $overwrite, $video_frame_rate, $gif_loop_count, $gif_frame_delay)
{
// create the gif
$gif = AnimatedGif::createFrom($output, 1/$video_frame_rate, $gif_loop_count, $this->_config);
// break out the dirname incase of relative pathways.
$name = basename($save_path);
$path = realpath(dirname($save_path));
$save_path = $path.DIRECTORY_SEPARATOR.$name;
// save the gif
$image = $gif->setFrameDelay($gif_frame_delay)
->setOverwriteMode($overwrite)
->save($save_path, $overwrite);
// remove tmp frame files
foreach ($output as $output_image)
{
@unlink($output_image->getMediaPath());
}
// return an updated output
return $image;
}
}
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