override media filter to show full file entities not just file field

gistfile1.aw

<?php 

/**
 * Implement hook_filter_info_alter().
 */
function whatsit_filter_info_alter(&$info) {
  $info['media_filter']['process callback'] = 'whatsit_media_filter';
}


/**
 * Filter callback for media markup filter.
 *
 * @TODO check for security probably pass text through filter_xss
 * @return unknown_type
 */
function whatsit_media_filter($text) {
  $text = ' ' . $text . ' ';
  $text = preg_replace_callback("/\[\[.*?]]/s",'whatsit_media_token_to_markup', $text);

  return $text;
}

/**
 * Replace callback to convert tag into markup
 * @param string $match
 * Takes a match of tag code
 * @param boolean $wysiwyg
 *   Set to TRUE if called from within the WYSIWYG text area editor.
 * @return
 * Return the replaced markup
 */
function whatsit_media_token_to_markup($match, $wysiwyg = FALSE) {
  $settings = array();
  $match = str_replace("[[","",$match);
  $match = str_replace("]]","",$match);
  $tag = $match[0];

  try {
    if (!is_string($tag)) {
      throw new Exception('Unable to find matching tag');
    }

    $tag_info = drupal_json_decode($tag);

    if (!isset($tag_info['fid'])) {
      throw new Exception('No file Id');
    }
    if (!isset($tag_info['view_mode'])) {
      // Should we log or throw an exception here instead?
      // Do we need to validate the view mode for fields API?
      $tag_info['view_mode'] = media_variable_get('wysiwyg_default_view_mode');
    }
    $file = file_load($tag_info['fid']);
    if (!$file) {
     throw new Exception('Could not load media object');
    }

    // Track the fid of this file in the {media_filter_usage} table.
    media_filter_track_usage($file->fid);

    $attributes = is_array($tag_info['attributes']) ? $tag_info['attributes'] : array();
    $attribute_whitelist = media_variable_get('wysiwyg_allowed_attributes');
    $settings['attributes'] = array_intersect_key($attributes, array_flip($attribute_whitelist));

    // Many media formatters will want to apply width and height independently
    // of the style attribute or the corresponding HTML attributes, so pull
    // these two out into top-level settings. Different WYSIWYG editors have
    // different behavior with respect to whether they store user-specified
    // dimensions in the HTML attributes or the style attribute, so check both.
    // Per http://www.w3.org/TR/html5/the-map-element.html#attr-dim-width, the
    // HTML attributes are merely hints: CSS takes precedence.
    if (isset($settings['attributes']['style'])) {
      $css_properties = media_parse_css_declarations($settings['attributes']['style']);
      foreach (array('width', 'height') as $dimension) {
        if (isset($css_properties[$dimension]) && substr($css_properties[$dimension], -2) == 'px') {
          $settings[$dimension] = substr($css_properties[$dimension], 0, -2);
        }
        elseif (isset($settings['attributes'][$dimension])) {
          $settings[$dimension] = $settings['attributes'][$dimension];
        }
      }
    }

    if ($wysiwyg) {
      $settings['wysiwyg'] = $wysiwyg;
    }
  }
  catch (Exception $e) {
    watchdog('media', 'Unable to render media from %tag. Error: %error', array('%tag' => $tag, '%error' => $e->getMessage()));
    return '';
  }


  $file->override = $settings;

  // Legacy support for Styles module plugins that expect overridden HTML
  // attributes in $file->override rather than $file->override['attributes'].
  if (isset($settings['attributes'])) {
    $file->override += $settings['attributes'];
  }


  $element = file_view($file, $tag_info['view_mode']);
  unset($settings['attributes']['alt']);
  unset($settings['attributes']['title']);

  // The formatter invoked by file_view_file() can use $file->override to
  // customize the returned render array to match the requested settings. To
  // support simple formatters that don't do this, set the element attributes to
  // what was requested, but not if the formatter applied its own logic for
  // element attributes.
  if (!isset($element['#attributes']) && isset($settings['attributes'])) {
    $element['#attributes'] = $settings['attributes'];
  }

  $element['#theme_wrappers'] = array('container');
  return drupal_render($element);
}

whatsit_media_token_to_markup() is almost completely identical to media_token_to_markup() except it uses file_view() instead of just showing the file field itself.