rx-player
Version:
Canal+ HTML5 Video Player
65 lines (64 loc) • 2.5 kB
JavaScript
;
/**
* Copyright 2015 CANAL+ Group
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = isCodecSupported;
var log_1 = require("../log");
var is_null_or_undefined_1 = require("../utils/is_null_or_undefined");
var is_worker_1 = require("../utils/is_worker");
var browser_compatibility_types_1 = require("./browser_compatibility_types");
/**
* Setting this value limit the number of entries in the support map
* preventing important memory usage, value is arbitrary
*/
var MAX_SUPPORT_MAP_ENTRIES = 200;
/**
* caching the codec support reduce the amount of call to `isTypeSupported`
* and help for performance especially on low-end devices.
*/
var supportMap = new Map();
/**
* Returns true if the given codec is supported by the browser's MediaSource
* implementation.
* @param {string} mimeType - The MIME media type that you want to test support
* for in the current browser.
* This may include the codecs parameter to provide added details about the
* codecs used within the file.
* @returns {Boolean}
*/
function isCodecSupported(mimeType) {
if ((0, is_null_or_undefined_1.default)(browser_compatibility_types_1.MediaSource_)) {
if (is_worker_1.default) {
log_1.default.error("Compat: Cannot request codec support in a worker without MSE.");
}
return false;
}
if (typeof browser_compatibility_types_1.MediaSource_.isTypeSupported === "function") {
var cachedSupport = supportMap.get(mimeType);
if (cachedSupport !== undefined) {
return cachedSupport;
}
else {
var isSupported = browser_compatibility_types_1.MediaSource_.isTypeSupported(mimeType);
if (supportMap.size >= MAX_SUPPORT_MAP_ENTRIES) {
supportMap.clear();
}
supportMap.set(mimeType, isSupported);
return isSupported;
}
}
return true;
}