diff options
Diffstat (limited to 'libraries/phpvideotoolkit/adapters/ffmpeg-php/ffmpeg_frame.php')
| -rw-r--r-- | libraries/phpvideotoolkit/adapters/ffmpeg-php/ffmpeg_frame.php | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/libraries/phpvideotoolkit/adapters/ffmpeg-php/ffmpeg_frame.php b/libraries/phpvideotoolkit/adapters/ffmpeg-php/ffmpeg_frame.php new file mode 100644 index 0000000..7928e2c --- /dev/null +++ b/libraries/phpvideotoolkit/adapters/ffmpeg-php/ffmpeg_frame.php @@ -0,0 +1,223 @@ +<?php + + /** + * This is a pure php emulation of the PHP module FFmpeg-PHP. + * @author Oliver Lillie (aka buggedcom) <publicmail@buggedcom.co.uk> + * @package PHPVideoToolkit + * @license BSD + * @copyright Copyright (c) 2008 Oliver Lillie <http://www.buggedcom.co.uk> + * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software + * is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE + * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR + * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * @see ffmpeg-php, + * - @link http://ffmpeg-php.sourceforge.net/ + * - @author Todd Kirby. + * - all phpdoc documentation is lifted directly from the ffmpeg-php docs + */ + + class ffmpeg_frame + { + + private $_gd_resource = null; + private $_width = null; + private $_height = null; + private $_timecode = null; + + /** + * Class Constructor + * @param resource $gd_resource A GD image resource. + * @param integer $_time (private) The time in seconds of the frame in the parent movie set from ffmpeg_movie::getFrame() + */ + function __construct($gd_resource, $_timecode) + { + $this->_gd_resource = $gd_resource; + $this->_timecode = $_timecode; + $this->_width = imagesx($gd_resource); + $this->_height = imagesy($gd_resource); + } + + function __destruct() + { + if(is_resource($this->_gd_resource)) + { + imagedestroy($this->_gd_resource); + } + } + + /** + * Determines if the resource supplied to the frame is valid. + * @access public + * @return integer + */ + public function hasValidResource() + { + return is_resource($this->_gd_resource); + } + + /** + * Return the width of the frame. + * @access public + * @return integer + */ + public function getWidth() + { + return $this->_width; + } + + /** + * Return the height of the frame. + * @access public + * @return integer + */ + public function getHeight() + { + return $this->_height; + } + + /** + * Return the presentation time stamp of the frame. + * @access public + * @uses ffmpeg_frame::getPTS() + * @return integer + */ + public function getPresentationTimestamp() + { + return $this->getPTS(); + } + + /** + * Return the presentation time stamp of the frame. + * @access public + * @return integer + */ + public function getPTS() + { + return $this->_timecode; + } + + /** + * Determines if the current frame is a keyframe. + * @access public + * @return integer + */ + public function isKeyFrame() + { + return false; + } + + /** + * Resize and optionally crop the frame. (Cropping is built into ffmpeg resizing so I'm providing it here for completeness.) + * NOTE 1: Cropping is always applied to the frame before it is resized. + * NOTE 2: Crop values must be even numbers. + * @access public + * @param integer $width New width of the frame (must be an even number). + * @param integer $height New height of the frame (must be an even number). + * @param integer $crop_top Remove [croptop] rows of pixels from the top of the frame. + * @param integer $crop_bottom Remove [cropbottom] rows of pixels from the bottom of the frame. + * @param integer $crop_left Remove [cropleft] rows of pixels from the left of the frame. + * @param integer $crop_right Remove [cropright] rows of pixels from the right of the frame. + * @return boolean + */ + public function resize($width, $height, $crop_top=false, $crop_bottom=false, $crop_left=false, $crop_right=false) + { +// are we cropping? + if($crop_top !== false || $crop_bottom !== false || $crop_left !== false || $crop_right !== false) + { +// crop and check it went ok + if(!$this->crop($crop_top, $crop_bottom, $crop_left, $crop_right)) + { + return false; + } + } +// check the width and height + if($width <= 0 || $height <= 0) + { + return false; + } +// now resize what we have + $resize_resource = imagecreatetruecolor($width, $height); +// copy the portion we want + imagecopyresampled($resize_resource, $this->_gd_resource, 0, 0, 0, 0, $width, $height, $this->_width, $this->_height); +// destroy the old crop resource to free up memory + imagedestroy($this->_gd_resource); +// save the new resource + $this->_gd_resource = $resize_resource; +// update the saved width and height + $this->_width = $width; + $this->_height = $height; + return true; + } + + /** + * Crop the frame. + * @access public + * @param integer $crop_top Remove [croptop] rows of pixels from the top of the frame. + * @param integer $crop_bottom Remove [cropbottom] rows of pixels from the bottom of the frame. + * @param integer $crop_left Remove [cropleft] rows of pixels from the left of the frame. + * @param integer $crop_right Remove [cropright] rows of pixels from the right of the frame. + * @return boolean + */ + public function crop($crop_top=false, $crop_bottom=false, $crop_left=false, $crop_right=false) + { +// work out the newwidth and height and positions + $w = $this->_width; + $h = $this->_height; + $x = 0; + $y = 0; + $x_bottom_chord = 0; + if($crop_top !== false) + { + $x = $crop_top; + $h -= $crop_top; + } + if($crop_bottom !== false) + { + $h -= $crop_bottom; + } + if($crop_left !== false) + { + $y = $crop_left; + $w -= $crop_left; + } + if($crop_right !== false) + { + $w -= $crop_left; + } +// is the width and height greater than 0 + if($w < 0 || $h < 0) + { + return false; + } +// create the new image resource + $crop_resource = imagecreatetruecolor($w, $h); +// copy the portion we want + imagecopyresampled($crop_resource, $this->_gd_resource, 0, 0, $x, $y, $w, $h, $w, $h); +// destroy the old resource to free up memory + imagedestroy($this->_gd_resource); +// save the new resource + $this->_gd_resource = $crop_resource; +// update the saved width and height + $this->_width = $w; + $this->_height = $h; + return true; + } + + /** + * Returns a truecolor GD image of the frame. + * @access public + * @return integer + */ + public function toGDImage() + { + return $this->_gd_resource; + } + + } +
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