mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-16 16:16:40 +03:00
Joey Parrish
434f1bf9b0
Before asking AbrManager to choose streams, we should choose codecs. Choose the most efficient codecs, and do it after we have filtered out the codecs that the platform cannot use. Closes #841 Change-Id: Ifbdd22b33254d4584f77db6456ab238f7c04c755
95 lines
2.3 KiB
JavaScript
95 lines
2.3 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.util.MapUtils');
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/**
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* @namespace shaka.util.MapUtils
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* @summary A set of map/object utility functions.
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*/
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/**
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* Returns true if the map is empty; otherwise, returns false.
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*
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* @param {Object.<KEY, VALUE>} object
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* @return {boolean}
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* @template KEY,VALUE
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*/
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shaka.util.MapUtils.empty = function(object) {
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return !object || Object.keys(object).length == 0;
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};
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/**
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* Gets the map's values.
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*
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* @param {!Object.<KEY, VALUE>} object
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* @return {!Array.<VALUE>}
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* @template KEY,VALUE
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*/
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shaka.util.MapUtils.values = function(object) {
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return Object.keys(object).map(function(key) { return object[key]; });
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};
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/**
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* Converts the values in the given Map to a different value.
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*
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* @param {!Object.<KEY, VALUE>} object
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* @param {function(VALUE, KEY=):OUTPUT} callback
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* @return {!Object.<KEY, OUTPUT>}
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* @template KEY,VALUE,OUTPUT
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*/
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shaka.util.MapUtils.map = function(object, callback) {
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return Object.keys(object).reduce(function(ret, key) {
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var value = object[key];
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ret[key] = callback(value, key);
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return ret;
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}, {});
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};
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/**
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* Returns true if every entry matches the predicate.
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*
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* @param {!Object.<KEY, VALUE>} object
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* @param {function(KEY, VALUE):boolean} callback
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* @return {boolean}
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* @template KEY,VALUE
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*/
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shaka.util.MapUtils.every = function(object, callback) {
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return Object.keys(object).every(function(key) {
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return callback(key, object[key]);
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});
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};
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/**
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* Invokes the callback for each entry in the map.
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*
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* @param {!Object.<KEY, VALUE>} object
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* @param {function(KEY, VALUE)} callback
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* @template KEY,VALUE
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*/
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shaka.util.MapUtils.forEach = function(object, callback) {
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Object.keys(object).forEach(function(key) {
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callback(key, object[key]);
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});
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};
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