/*
 * Copyright (C) 2015 Glyptodon LLC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

var Guacamole = Guacamole || {};

/**
 * Abstract video player which accepts, queues and plays back arbitrary video
 * data. It is up to implementations of this class to provide some means of
 * handling a provided Guacamole.InputStream and rendering the received data to
 * the provided Guacamole.Display.VisibleLayer. Data received along the
 * provided stream is to be played back immediately.
 *
 * @constructor
 */
Guacamole.VideoPlayer = function VideoPlayer() {

    /**
     * Notifies this Guacamole.VideoPlayer that all video up to the current
     * point in time has been given via the underlying stream, and that any
     * difference in time between queued video data and the current time can be
     * considered latency.
     */
    this.sync = function sync() {
        // Default implementation - do nothing
    };

};

/**
 * Determines whether the given mimetype is supported by any built-in
 * implementation of Guacamole.VideoPlayer, and thus will be properly handled
 * by Guacamole.VideoPlayer.getInstance().
 *
 * @param {String} mimetype
 *     The mimetype to check.
 *
 * @returns {Boolean}
 *     true if the given mimetype is supported by any built-in
 *     Guacamole.VideoPlayer, false otherwise.
 */
Guacamole.VideoPlayer.isSupportedType = function isSupportedType(mimetype) {

    // There are currently no built-in video players (and therefore no
    // supported types)
    return false;

};

/**
 * Returns a list of all mimetypes supported by any built-in
 * Guacamole.VideoPlayer, in rough order of priority. Beware that only the core
 * mimetypes themselves will be listed. Any mimetype parameters, even required
 * ones, will not be included in the list.
 *
 * @returns {String[]}
 *     A list of all mimetypes supported by any built-in Guacamole.VideoPlayer,
 *     excluding any parameters.
 */
Guacamole.VideoPlayer.getSupportedTypes = function getSupportedTypes() {

    // There are currently no built-in video players (and therefore no
    // supported types)
    return [];

};

/**
 * Returns an instance of Guacamole.VideoPlayer providing support for the given
 * video format. If support for the given video format is not available, null
 * is returned.
 *
 * @param {Guacamole.InputStream} stream
 *     The Guacamole.InputStream to read video data from.
 *
 * @param {Guacamole.Display.VisibleLayer} layer
 *     The destination layer in which this Guacamole.VideoPlayer should play
 *     the received video data.
 *
 * @param {String} mimetype
 *     The mimetype of the video data in the provided stream.
 *
 * @return {Guacamole.VideoPlayer}
 *     A Guacamole.VideoPlayer instance supporting the given mimetype and
 *     reading from the given stream, or null if support for the given mimetype
 *     is absent.
 */
Guacamole.VideoPlayer.getInstance = function getInstance(stream, layer, mimetype) {

    // There are currently no built-in video players
    return null;

};