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   1  <?php
   2  
   3  /*
   4   * @file
   5   * Class file used to wrap the transcoder functions.
   6   *
   7   * @todo need more commenting
   8   * - Add Metadata support
   9   * Add autoloading
  10   * # http://stackoverflow.com/questions/3343208/php-class-lazy-loading
  11   * # http://php.net/manual/en/language.oop5.autoload.php
  12   * 
  13   */
  14  
  15  class video_transcoder {
  16  
  17    private $transcoder;
  18  
  19    public function __construct($transcoder = null) {
  20      $this->transcoder = $this->get_instance($transcoder);
  21    }
  22  
  23    /**
  24     *
  25     * @param <type> $transcoder 
  26     */
  27    private function get_instance($transcoder = null) {
  28      //get our configured transcoder.
  29      if (!isset($transcoder))
  30        $transcoder = variable_get('vid_convertor', 'video_ffmpeg');
  31  //    module_load_include('inc', 'video', '/transcoders/' . $transcoder);
  32      if (!module_load_include('inc', 'video', '/transcoders/' . $transcoder)) {
  33        $modules = module_list();
  34        $files = array();
  35        foreach ($modules as $module) {
  36          $module_path = drupal_get_path('module', $module) . '/transcoders';
  37          $inc_files = file_scan_directory($module_path, '^.*\.inc$');
  38          if (!empty($inc_files))
  39            $files[$module] = $inc_files;
  40        }
  41        // @TODO : add lazy load
  42        foreach ($files as $module => $_files) {
  43          foreach ($_files as $file) {
  44            if ($file->name == $transcoder)
  45              module_load_include('inc', $module, '/transcoders/' . $file->name);
  46          }
  47        }
  48      }
  49  
  50      if (class_exists($transcoder)) {
  51        $transcoder_instance = new $transcoder;
  52        $this->transcoder = $transcoder_instance;
  53        return $transcoder_instance;
  54      } else {
  55        drupal_set_message(t('The transcoder is not configured properly.'), 'error');
  56      }
  57    }
  58  
  59    public function generate_thumbnails($video) {
  60      return $this->transcoder->generate_thumbnails($video);
  61    }
  62  
  63    public function convert_video(&$video) {
  64      module_load_include('inc', 'video', '/includes/preset');
  65      $video_preset = new video_preset();
  66      $presets = $video_preset->properties();
  67      $video->presets = $presets;
  68      $output = $this->transcoder->convert_video($video);
  69      // if successfully converted the video then update the status to publish
  70      if ($output)
  71      // Update our node id to published.  We do not do a node_load as it causes editing problems when saving.
  72        db_query("UPDATE {node} SET status=%d WHERE nid=%d", 1, $video->nid);
  73  
  74      // If they are using metadata.
  75      // @TODO : add meta data support
  76  //    if (variable_get('video_metadata', FALSE)) {
  77  //      module_load_include('inc', 'video', '/includes/metadata');
  78  //      $metadata = new video_metadata;
  79  //      $metadata->process($converted);
  80  //    }
  81      return $output;
  82    }
  83  
  84    public function admin_settings() {
  85      $form = array();
  86      $options = $this->_transcoders();
  87      $form['vid_convertor'] = array(
  88        '#type' => 'radios',
  89        '#title' => t('Video transcoder'),
  90        '#default_value' => variable_get('vid_convertor', 'video_ffmpeg'),
  91        '#options' => $options['radios'],
  92        '#description' => t('Selecting a video transcoder will help you convert videos and generate thumbnails. !list', array('!list' => theme('item_list', $options['help']))),
  93        '#prefix' => '<div id="transcoder-radios">',
  94        '#suffix' => '</div>',
  95      );
  96      $form = $form + $options['admin_settings'];
  97      return $form;
  98    }
  99  
 100    public function admin_settings_validate($form, &$form_state) {
 101      return $this->transcoder->admin_settings_validate($form, $form_state);
 102    }
 103  
 104    private function _transcoders() {
 105      // @TODO : think to change this to observer patteren
 106      $files = array();
 107      // Lets find our transcoder classes and build our radio options
 108      // We do this by scanning our transcoders folder
 109      $form = array('radios' => array(), 'help' => array(), 'admin_settings' => array());
 110      $path = drupal_get_path('module', 'video') . '/transcoders';
 111      $files = file_scan_directory($path, '^.*\.inc$');
 112      // check inside sub modules
 113      $modules = module_list();
 114      foreach ($modules as $module) {
 115        $mobule_files = array();
 116        $module_path = drupal_get_path('module', $module) . '/transcoders';
 117        $mobule_files = file_scan_directory($module_path, '^.*\.inc$');
 118        $files = array_merge($files, $mobule_files);
 119      }
 120  
 121      foreach ($files as $file) {
 122        if (!module_load_include('inc', 'video', '/transcoders/' . $file->name))
 123          require_once $file->filename;
 124        $focus = new $file->name;
 125        $form['radios'][$focus->get_value()] = $focus->get_name();
 126        $form['help'][] = $focus->get_help();
 127        $form['admin_settings'] = $form['admin_settings'] + $focus->admin_settings();
 128      }
 129  //    //we need to move our video/thumbnail fieldsets to the bottom of our form as they are used for each trancoder
 130  //    $autothumb = $form['admin_settings']['autothumb'];
 131  //    $autoconv = $form['admin_settings']['autoconv'];
 132  //    unset($form['admin_settings']['autothumb'], $form['admin_settings']['autoconv']);
 133  //    if(!$this->transcoder->is_wsod())
 134  //    $form['admin_settings']['autothumb'] = $autothumb;
 135  //    $form['admin_settings']['autoconv'] = $autoconv;
 136      return $form;
 137    }
 138  
 139    public function get_dimensions($video) {
 140      return $this->transcoder->get_dimensions($video);
 141    }
 142  
 143    public function create_job($video) {
 144      return $this->transcoder->create_job($video);
 145    }
 146  
 147    public function update_job($video) {
 148      return $this->transcoder->update_job($video);
 149    }
 150  
 151    public function delete_job($video) {
 152      return $this->transcoder->delete_job($video);
 153    }
 154  
 155    /**
 156     * Load a file based on the file id ($fid)
 157     *
 158     * @param $fid
 159     *   Integer of the file id to be loaded.
 160     */
 161    public function load_job($fid) {
 162      return $this->transcoder->load_job($fid);
 163    }
 164  
 165    public function load_job_queue() {
 166      return $this->transcoder->load_job_queue();
 167    }
 168  
 169    public function load_completed_job(&$video) {
 170      return $this->transcoder->load_completed_job($video);
 171    }
 172  
 173  }
 174  
 175  interface transcoder_interface {
 176  
 177    public function create_job($video);
 178  
 179    public function update_job($video);
 180  
 181    public function delete_job($video);
 182  
 183    public function load_job($fid);
 184  
 185    public function load_job_queue();
 186  
 187    public function load_completed_job(&$video);
 188  
 189    public function change_status($vid, $status);
 190  
 191    public function generate_thumbnails($video);
 192  
 193    public function convert_video($video);
 194  
 195    public function get_name();
 196  
 197    public function get_value();
 198  
 199    public function get_help();
 200  
 201    public function admin_settings();
 202  
 203    public function admin_settings_validate($form, &$form_state);
 204  }