bp_attachments_get_plupload_default_settings()

function bp_attachments_get_plupload_default_settings() {

	$max_upload_size = wp_max_upload_size();

	if ( ! $max_upload_size ) {
		$max_upload_size = 0;
	}

	$defaults = array(
		'runtimes'            => 'html5,flash,silverlight,html4',
		'file_data_name'      => 'file',
		'multipart_params'    => array(
			'action'          => 'bp_upload_attachment',
			'_wpnonce'        => wp_create_nonce( 'bp-uploader' ),
		),
		'url'                 => admin_url( 'admin-ajax.php', 'relative' ),
		'flash_swf_url'       => includes_url( 'js/plupload/plupload.flash.swf' ),
		'silverlight_xap_url' => includes_url( 'js/plupload/plupload.silverlight.xap' ),
		'filters' => array(
			'max_file_size'   => $max_upload_size . 'b',
		),
		'multipart'           => true,
		'urlstream_upload'    => true,
	);

	// WordPress is not allowing multi selection for iOs 7 device.. See #29602.
	if ( wp_is_mobile() && strpos( $_SERVER['HTTP_USER_AGENT'], 'OS 7_' ) !== false &&
		strpos( $_SERVER['HTTP_USER_AGENT'], 'like Mac OS X' ) !== false ) {

		$defaults['multi_selection'] = false;
	}

	$settings = array(
		'defaults' => $defaults,
		'browser'  => array(
			'mobile'    => wp_is_mobile(),
			'supported' => _device_can_upload(),
		),
		'limitExceeded' => is_multisite() && ! is_upload_space_available(),
	);

	/**
	 * Filter the BuddyPress Plupload default settings.
	 *
	 * @since BuddyPress 2.3.0
	 *
	 * @param array $settings Default Plupload parameters array.
	 */
	return apply_filters( 'bp_attachments_get_plupload_default_settings', $settings );
}