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File: src/PHPVideoToolkit/ProgressHandlerAbstract.php

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  Classes of Oliver Lillie  >  PHP Video Toolkit  >  src/PHPVideoToolkit/ProgressHandlerAbstract.php  >  Download  
File: src/PHPVideoToolkit/ProgressHandlerAbstract.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: fixed bugs with progress handlers that prevented both methods of envying the handlers from working
Date: 11 months ago
Size: 5,897 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;

   
/**
     * @access public
     * @author Oliver Lillie
     * @package default
     */
   
abstract class ProgressHandlerAbstract extends ProgressHandlerDefaultData
   
{
        protected
$_config;
       
        protected
$_is_non_blocking_comaptible = true;
        
        protected
$_ffmpeg_process;
        protected
$_temp_directory;
       
        protected
$_callback;
        protected
$_total_duration;
       
        private
$_wait_on_next_probe;
       
        public
$completed;
                
        public function
__construct($callback=null, Config $config=null)
        {
            if(
$callback !== null && is_callable($callback) === false)
            {
                throw new
Exception('The progress handler callback is not callable.');
            }
           
           
$this->_config = $config === null ? Config::getInstance() : $config;
           
           
$this->completed = null;
           
$this->_callback = $callback;
           
$this->_total_duration = 0;
           
$this->_ffmpeg_process = null;
           
$this->_wait_on_next_probe = false;
           
// check to see if we have been supplied a callback, if so then it is no longer compatible
// with a non blocking save.
           
if($this->_callback !== null)
            {
               
$this->_is_non_blocking_comaptible = false;
            }
        }
       
        public function
getNonBlockingCompatibilityStatus()
        {
            return
$this->_is_non_blocking_comaptible;
        }
       
        public function
setTotalDuration(Timecode $duration)
        {
           
$this->_total_duration = $duration;
           
            return
$this;
        }

        public function
probe($probe_then_wait=true, $seconds=1)
        {
            if(
$this->_wait_on_next_probe === true)
            {
                if(
is_int($seconds) === false && is_float($seconds) === false)
                {
                    throw new
Exception('$seconds must be an integer.');
                }
                else if(
$seconds <= 0)
                {
                    throw new
Exception('$seconds must be an integer greater than 0.');
                }
               
               
usleep($seconds*100000);
            }
           
           
$this->_wait_on_next_probe = $probe_then_wait;
           
            return
$this->_processOutputFile();
        }
       
        public function
callback()
        {
            if(
is_callable($this->_callback) === true)
            {
               
$data = $this->_processOutputFile();
               
call_user_func($this->_callback, $data);
            }
        }
       
        public function
attachFfmpegProcess(FfmpegProcess $process, Config $config=null)
        {
            if(
$config !== null)
            {
               
$this->_config = $config;
            }
           
$this->_ffmpeg_process = $process;
        }

        protected function
_processOutputFile()
        {
// setup the data to return.
           
$return_data = $this->_getDefaultData();
           
$return_data['run_time'] = $this->_ffmpeg_process->getRunTime();

// load up the data
           
$completed = false;
           
$raw_data = $this->_getRawData();
           
            if(empty(
$raw_data) === false)
            {
// parse the raw data into the return data
               
$this->_parseOutputData($return_data, $raw_data);
               
// check to see if the process has completed
               
if($return_data['percentage'] >= 100)
                {
                   
$return_data['percentage'] = 100;
                   
$return_data['output_file'] = $this->_ffmpeg_process->getOutputPath();
                }
// or if it has been interuptted
               
else if($return_data['interrupted'] === true)
                {
                }
            }
           
// check for any errors encountered by the parser
           
if($this->_checkOutputForErrors($return_data) === true)
            {
            }
           
// has the process completed itself?
           
$this->completed = $return_data['completed'];
           
            return
$return_data;
        }

        protected function
_checkOutputForErrors(&$return_data)
        {
            if(
$this->_ffmpeg_process->hasError() === true)
            {
               
$lines = explode(PHP_EOL, trim($this->_ffmpeg_process->getBuffer()));

               
$return_data['error'] = true;
               
$error_lines = array();
                while(
true)
                {
                   
$line = array_pop($lines);
                    if(
substr($line, 0, 1) === ' ')
                    {
                        break;
                    }
                   
                   
array_push($error_lines, $line);
                }
               
                if(empty(
$error_lines) === false)
                {
                   
$error_lines = array_reverse($error_lines);
                   
$return_data['error_message'] = implode(' ', $error_lines);
                }
               
                return
true;
            }
           
            return
false;
        }

        abstract protected function
_getRawData();
        
        abstract protected function
_parseOutputData(&$return_data, $raw_data);
    }