/**
* @param {Object}   current  Current list item.
* @param {function} success  See the table.
* @param {function} error    No param and only audio is available.
*/
function callback(current, success, error) {}

/**
 * @param {Object} current    Current list item.
 * @param {Object} callbacks
 * {
 *     success: function(name, ...arguments) {},
 *     error: function(name) {}
 * }
 */
function callback(current, callbacks) {}

window.QPlayer = $.extend(true, window.QPlayer, {
    provider: {
        example: {
            lyrics: function(current, success) {
                if (current.lrc) {
                    $.ajax({
                        url: current.lrc,
                        success: function(lrc) {
                            if (lrc) {
                                success(lrc);
                            }
                        }
                    });
                }
            }
        }
    },
    list: [{
        name: 'Hello World',
        lrc: 'Hello World.lrc',
        provider: 'example'
    }]
});
window.QPlayer.list = [{
    name: 'Hello World',
    lrc: 'Hello World.lrc',
    provider: 'example'
}];

window.QPlayer = $.extend(true, window.QPlayer, {
    provider: {
        example: {
            load: function(current, callbacks) {
                var name = current.name;
                callbacks.success('audio', name + '.mp3');
                callbacks.success('cover', name + '.png');
                $.ajax({
                    url: name + '.lrc',
                    success: function(lrc) {
                        if (lrc) {
                            callbacks.success('lyrics', lrc);
                        }
                    }
                });
            }
        }
    }
});
window.QPlayer.list = [{
    name: 'Hello World',
    provider: 'example'
}];

/**
* @param {Object|String} options A color or options.
*/
function setColor(options) {}