/**
 * This function will alter the upload url, path and subdir parameters
 *
 * @param $param    array : upload parameters, ( path, url, ... )
 * @param $uploaded array : media details being uploaded, ( context_id, title, ... )
 *
 * @return array
 */
function rtmedia_change_upload_path( $param, $uploaded ) {

	// Return as it is if $param is not array
	if ( ! is_array( $param ) || ! is_array( $uploaded ) ) {
		return $param;
	}

	// Change parameters only if the URL is from rtMedia and `get_the_ID()` returns valid post ID.
	if ( stripos( $param['url'], 'rtmedia' ) !== false ) {
		$param['url']    .= '/' . $uploaded['context_id'] . '-' . $uploaded['context'];
		$param['path']   .= '/' . $uploaded['context_id'] . '-' . $uploaded['context'];
		$param['subdir'] .= '/' . $uploaded['context_id'] . '-' . $uploaded['context'];
	}

	return $param;
}
add_filter( 'rtmedia_filter_upload_dir', 'rtmedia_change_upload_path', 10, 2 );