transcoder.inc in Video 6.4

File

includes/transcoder.inc

<?php

/*
 * @file
 * Class file used to wrap the transcoder functions.
 *
 * @todo need more commenting
 * - Add Metadata support
 * Add autoloading
 * # http://stackoverflow.com/questions/3343208/php-class-lazy-loading
 * # http://php.net/manual/en/language.oop5.autoload.php
 * 
 */
class video_transcoder {
  private $transcoder;
  public function __construct($transcoder = null) {
    $this->transcoder = $this
      ->get_instance($transcoder);
  }

  /**
   *
   * @param <type> $transcoder
   */
  private function get_instance($transcoder = null) {

    //get our configured transcoder.
    if (!isset($transcoder)) {
      $transcoder = variable_get('vid_convertor', 'video_ffmpeg');
    }

    //    module_load_include('inc', 'video', '/transcoders/' . $transcoder);
    if (!module_load_include('inc', 'video', '/transcoders/' . $transcoder)) {
      $modules = module_list();
      $files = array();
      foreach ($modules as $module) {
        $module_path = drupal_get_path('module', $module) . '/transcoders';
        $inc_files = file_scan_directory($module_path, '^.*\\.inc$');
        if (!empty($inc_files)) {
          $files[$module] = $inc_files;
        }
      }

      // @TODO : add lazy load
      foreach ($files as $module => $_files) {
        foreach ($_files as $file) {
          if ($file->name == $transcoder) {
            module_load_include('inc', $module, '/transcoders/' . $file->name);
          }
        }
      }
    }
    if (class_exists($transcoder)) {
      $transcoder_instance = new $transcoder();
      $this->transcoder = $transcoder_instance;
      return $transcoder_instance;
    }
    else {
      drupal_set_message(t('The transcoder is not configured properly.'), 'error');
    }
  }
  public function generate_thumbnails($video) {
    return $this->transcoder
      ->generate_thumbnails($video);
  }
  public function convert_video(&$video) {
    module_load_include('inc', 'video', '/includes/preset');
    $video_preset = new video_preset();
    $presets = $video_preset
      ->properties();
    $video->presets = $presets;
    $output = $this->transcoder
      ->convert_video($video);

    // if successfully converted the video then update the status to publish
    if ($output) {

      // Update our node id to published.  We do not do a node_load as it causes editing problems when saving.
      db_query("UPDATE {node} SET status=%d WHERE nid=%d", 1, $video->nid);
    }

    // If they are using metadata.
    // @TODO : add meta data support
    //    if (variable_get('video_metadata', FALSE)) {
    //      module_load_include('inc', 'video', '/includes/metadata');
    //      $metadata = new video_metadata;
    //      $metadata->process($converted);
    //    }
    return $output;
  }
  public function admin_settings() {
    $form = array();
    $options = $this
      ->_transcoders();
    $form['vid_convertor'] = array(
      '#type' => 'radios',
      '#title' => t('Video transcoder'),
      '#default_value' => variable_get('vid_convertor', 'video_ffmpeg'),
      '#options' => $options['radios'],
      '#description' => t('Selecting a video transcoder will help you convert videos and generate thumbnails. !list', array(
        '!list' => theme('item_list', $options['help']),
      )),
      '#prefix' => '<div id="transcoder-radios">',
      '#suffix' => '</div>',
    );
    $form = $form + $options['admin_settings'];
    return $form;
  }
  public function admin_settings_validate($form, &$form_state) {
    return $this->transcoder
      ->admin_settings_validate($form, $form_state);
  }
  private function _transcoders() {

    // @TODO : think to change this to observer patteren
    $files = array();

    // Lets find our transcoder classes and build our radio options
    // We do this by scanning our transcoders folder
    $form = array(
      'radios' => array(),
      'help' => array(),
      'admin_settings' => array(),
    );
    $path = drupal_get_path('module', 'video') . '/transcoders';
    $files = file_scan_directory($path, '^.*\\.inc$');

    // check inside sub modules
    $modules = module_list();
    foreach ($modules as $module) {
      $mobule_files = array();
      $module_path = drupal_get_path('module', $module) . '/transcoders';
      $mobule_files = file_scan_directory($module_path, '^.*\\.inc$');
      $files = array_merge($files, $mobule_files);
    }
    foreach ($files as $file) {
      if (!module_load_include('inc', 'video', '/transcoders/' . $file->name)) {
        require_once $file->filename;
      }
      $focus = new $file->name();
      $form['radios'][$focus
        ->get_value()] = $focus
        ->get_name();
      $form['help'][] = $focus
        ->get_help();
      $form['admin_settings'] = $form['admin_settings'] + $focus
        ->admin_settings();
    }

    //    //we need to move our video/thumbnail fieldsets to the bottom of our form as they are used for each trancoder
    //    $autothumb = $form['admin_settings']['autothumb'];
    //    $autoconv = $form['admin_settings']['autoconv'];
    //    unset($form['admin_settings']['autothumb'], $form['admin_settings']['autoconv']);
    //    if(!$this->transcoder->is_wsod())
    //    $form['admin_settings']['autothumb'] = $autothumb;
    //    $form['admin_settings']['autoconv'] = $autoconv;
    return $form;
  }
  public function get_dimensions($video) {
    return $this->transcoder
      ->get_dimensions($video);
  }
  public function create_job($video) {
    return $this->transcoder
      ->create_job($video);
  }
  public function update_job($video) {
    return $this->transcoder
      ->update_job($video);
  }
  public function delete_job($video) {
    return $this->transcoder
      ->delete_job($video);
  }

  /**
   * Load a file based on the file id ($fid)
   *
   * @param $fid
   *   Integer of the file id to be loaded.
   */
  public function load_job($fid) {
    return $this->transcoder
      ->load_job($fid);
  }
  public function load_job_queue() {
    return $this->transcoder
      ->load_job_queue();
  }
  public function load_completed_job(&$video) {
    return $this->transcoder
      ->load_completed_job($video);
  }

}
interface transcoder_interface {
  public function create_job($video);
  public function update_job($video);
  public function delete_job($video);
  public function load_job($fid);
  public function load_job_queue();
  public function load_completed_job(&$video);
  public function change_status($vid, $status);
  public function generate_thumbnails($video);
  public function convert_video($video);
  public function get_name();
  public function get_value();
  public function get_help();
  public function admin_settings();
  public function admin_settings_validate($form, &$form_state);

}

Classes

Name	Description
video_transcoder

Interfaces

Name	Description
transcoder_interface