mirror of
https://github.com/Poniverse/Pony.fm.git
synced 2024-11-29 08:07:59 +01:00
292 lines
No EOL
8.8 KiB
PHP
292 lines
No EOL
8.8 KiB
PHP
<?php
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/**
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* FFmpegAnimatedGif represents an animated gif object
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*
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* This class in implemented in rather un-orthodox way.
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* Reason is that ffmpeg doesn't provide satisfactory
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* quality and compression of animated gifs.
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*
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* Code fragments used from: GIFEncoder Version 2.0 by László Zsidi
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*
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* @author char0n (Vladimír Gorej, gorej@codescale.net)
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* @package FFmpegPHP
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* @license New BSD
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* @version 2.6
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*/
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class FFmpegAnimatedGif implements Serializable {
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/**
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* Location in the filesystem where the animated gif will be written.
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*
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* @var string
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*/
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protected $outFilePath;
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/**
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* Width of the animated gif.
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*
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* @var int
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*/
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protected $width;
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/**
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* Height of the animated gif.
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*
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* @var int
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*/
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protected $height;
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/**
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* Frame rate of the animated gif in frames per second.
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*
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* @var int
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*/
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protected $frameRate;
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/**
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* Number of times to loop the animation. Put a zero here to loop forever or omit this parameter to disable looping.
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*
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* @var int
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*/
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protected $loopCount;
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/**
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* Binary data of gif files to create animation
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*
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* @var array
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*/
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protected $frames;
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/**
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* Gif binary data of animation
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*
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* @var string
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*/
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protected $gifData;
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/**
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* Counter of first animation
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*
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* @var mixed
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*/
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protected $counter;
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/**
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* Create a new FFmpegAnimatedGif object
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*
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* @param string $outFilePath Location in the filesystem where the animated gif will be written.
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* @param int $width Width of the animated gif.
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* @param int $height Height of the animated gif.
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* @param int $frameRate Frame rate of the animated gif in frames per second.
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* @param int $loopCount Number of times to loop the animation. Put a zero here to loop forever or omit this parameter to disable looping.
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* @return FFmpegAnimatedGif
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*/
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public function __construct($outFilePath, $width, $height, $frameRate, $loopCount) {
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$this->outFilePath = $outFilePath;
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$this->width = $width;
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$this->height = $height;
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$this->frameRate = $frameRate;
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$this->loopCount = ($loopCount < -1) ? 0 : $loopCount;
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$this->frames = array();
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$this->counter = -1;
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}
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/**
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* Add a frame to the end of the animated gif.
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*
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* @param FFmpegFrame $frame frame to add
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* @return void
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*/
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public function addFrame(FFmpegFrame $frame) {
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$tmpFrame = clone $frame;
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$tmpFrame->resize($this->width, $this->height);
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ob_start();
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imagegif($tmpFrame->toGDImage());
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$this->frames[] = ob_get_clean();
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$tmpFrame = null;
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}
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/**
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* Adding header to the animation
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*
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* @return void
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*/
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protected function addGifHeader() {
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$cmap = 0;
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if (ord($this->frames[0]{10}) & 0x80) {
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$cmap = 3 * (2 << (ord($this->frames[0]{10}) & 0x07));
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$this->gifData = 'GIF89a';
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$this->gifData .= substr($this->frames[0], 6, 7);
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$this->gifData .= substr($this->frames[0], 13, $cmap);
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$this->gifData .= "!\377\13NETSCAPE2.0\3\1".$this->getGifWord($this->loopCount)."\0";
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}
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}
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/**
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* Adding frame binary data to the animation
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*
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* @param int $i index of frame from FFmpegAnimatedGif::frame array
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* @param int $d delay (5 seconds = 500 delay units)
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* @return void
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*/
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protected function addFrameData($i, $d) {
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$DIS = 2;
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$COL = 0;
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$Locals_str = 13 + 3 * (2 << (ord($this->frames[$i]{10}) & 0x07));
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$Locals_end = strlen($this->frames[$i]) - $Locals_str - 1;
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$Locals_tmp = substr($this->frames[$i], $Locals_str, $Locals_end );
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$Global_len = 2 << (ord($this->frames[0]{10}) & 0x07);
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$Locals_len = 2 << (ord($this->frames[$i]{10}) & 0x07);
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$Global_rgb = substr($this->frames[0], 13, 3 * (2 << (ord($this->frames[0]{10}) & 0x07)));
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$Locals_rgb = substr($this->frames[$i], 13, 3 * (2 << (ord($this->frames[$i]{10}) & 0x07)));
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$Locals_ext = "!\xF9\x04".chr(($DIS << 2 ) + 0). chr(($d >> 0) & 0xFF).chr(($d >> 8) & 0xFF)."\x0\x0";
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if ($COL > -1 && ord($this->frames[$i]{10}) & 0x80) {
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for ($j = 0; $j < (2 << (ord($this->frames[$i]{10}) & 0x07)); $j++) {
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if (ord($Locals_rgb{3 * $j + 0}) == (($COL >> 16 ) & 0xFF)
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&& ord($Locals_rgb{3 * $j + 1}) == (($COL >> 8 ) & 0xFF)
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&& ord($Locals_rgb{3 * $j + 2}) == (($COL >> 0 ) & 0xFF)
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) {
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$Locals_ext = "!\xF9\x04".chr(($DIS << 2) + 1).chr(($d >> 0) & 0xFF).chr(($d >> 8) & 0xFF).chr($j)."\x0";
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break;
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}
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}
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}
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switch ($Locals_tmp{0}) {
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case "!":
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$Locals_img = substr($Locals_tmp, 8, 10);
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$Locals_tmp = substr($Locals_tmp, 18, strlen($Locals_tmp) - 18);
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break;
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case ",":
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$Locals_img = substr($Locals_tmp, 0, 10);
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$Locals_tmp = substr($Locals_tmp, 10, strlen($Locals_tmp) - 10);
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break;
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}
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if (ord($this->frames[$i]{10}) & 0x80 && $this->counter > -1) {
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if ($Global_len == $Locals_len) {
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if ($this->gifBlockCompare($Global_rgb, $Locals_rgb, $Global_len)) {
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$this->gifData .= ($Locals_ext.$Locals_img.$Locals_tmp);
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}
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else {
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$byte = ord($Locals_img{9});
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$byte |= 0x80;
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$byte &= 0xF8;
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$byte |= (ord($this->frames[0]{10}) & 0x07);
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$Locals_img{9} = chr ($byte);
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$this->gifData .= ($Locals_ext.$Locals_img.$Locals_rgb.$Locals_tmp);
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}
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}
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else {
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$byte = ord($Locals_img{9});
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$byte |= 0x80;
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$byte &= 0xF8;
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$byte |= (ord($this->frames[$i]{10}) & 0x07);
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$Locals_img{9} = chr($byte);
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$this->gifData .= ($Locals_ext.$Locals_img.$Locals_rgb.$Locals_tmp);
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}
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}
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else {
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$this->gifData .= ($Locals_ext.$Locals_img.$Locals_tmp);
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}
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$this->counter = 1;
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}
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/**
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* Adding footer to the animation
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*
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* @return void
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*/
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protected function addGifFooter() {
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$this->gifData .= ';';
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}
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/**
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* Gif integer wrapper
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*
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* @param int $int
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* @return string
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*/
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protected function getGifWord($int) {
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return (chr($int & 0xFF).chr(($int >> 8 ) & 0xFF));
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}
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/**
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* Gif compare block
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*
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* @param string $GlobalBlock
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* @param string $LocalBlock
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* @param int $Len
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* @return int
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*/
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protected function gifBlockCompare($GlobalBlock, $LocalBlock, $Len) {
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for ($i = 0; $i < $Len; $i++) {
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if (
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$GlobalBlock{3 * $i + 0} != $LocalBlock {3 * $i + 0} ||
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$GlobalBlock{3 * $i + 1} != $LocalBlock {3 * $i + 1} ||
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$GlobalBlock{3 * $i + 2} != $LocalBlock {3 * $i + 2}
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) {
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return (0);
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}
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}
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return (1);
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}
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/**
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* Saving animated gif to remote file
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*
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* @return boolean
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*/
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public function save() {
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// No images to proces
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if (count($this->frames) == 0) return false;
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return (boolean) file_put_contents($this->outFilePath, $this->getAnimation(), LOCK_EX);
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}
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/**
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* Getting animation binary data
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*
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* @return string|boolean
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*/
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public function getAnimation() {
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// No images to proces
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if (count($this->frames) == 0) return false;
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// Process images as animation
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$this->addGifHeader();
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for ($i = 0; $i < count($this->frames); $i++) {
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$this->addFrameData($i, (1 / $this->frameRate * 100));
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}
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$this->addGifFooter();
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return $this->gifData;
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}
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public function serialize() {
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return serialize(array(
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$this->outFilePath,
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$this->width,
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$this->height,
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$this->frameRate,
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$this->loopCount,
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$this->gifData,
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$this->frames,
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$this->counter
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));
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}
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public function unserialize($serialized) {
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$data = unserialize($serialized);
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list(
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$this->outFilePath,
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$this->width,
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$this->height,
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$this->frameRate,
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$this->loopCount,
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$this->gifData,
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$this->frames,
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$this->counter
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) = $data;
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}
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} |