mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-16 16:16:40 +03:00
Jacob Trimble
899c322995
Added a new class called FailoverUri which handles multiple URLs and switches to others when one fails. This is also handles the request itself. This replaces SegmentMetadata as well as a number of manual requests. The MPD parser now produces arrays of URIs rather than just one. The MPD Processor then converts it to a FailoverUri inside the manifest. Added unit tests to test the new functionality and updated the old ones to the new changes. This does not support failover on subtitles since subtitles are handled by the browser. Closes #68 Change-Id: I5410104827b9e4102b243444b1b5a3f01dcaf10d
81 lines
2.4 KiB
JavaScript
81 lines
2.4 KiB
JavaScript
/**
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* Copyright 2014 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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* @fileoverview Implements an MPD request.
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*/
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goog.provide('shaka.dash.MpdRequest');
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goog.require('shaka.dash.mpd');
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goog.require('shaka.player.Defaults');
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goog.require('shaka.util.AjaxRequest');
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goog.require('shaka.util.FailoverUri');
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/**
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* Creates an MpdRequest.
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*
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* @param {!shaka.util.FailoverUri} url The URL.
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* @param {number=} opt_requestTimeout The timeout for a MpdRequest in seconds.
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*
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* @struct
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* @constructor
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*/
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shaka.dash.MpdRequest = function(url, opt_requestTimeout) {
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/** @private {!shaka.util.AjaxRequest.Parameters} */
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this.parameters_ = new shaka.util.AjaxRequest.Parameters();
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var timeoutSeconds = opt_requestTimeout != null ?
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opt_requestTimeout : shaka.player.Defaults.MPD_REQUEST_TIMEOUT;
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this.parameters_.responseType = 'text';
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this.parameters_.maxAttempts = 3;
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this.parameters_.requestTimeoutMs = timeoutSeconds * 1000;
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// The server delivering the DASH manifest is the only one that we should
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// be synchronizing our clock against, because the time parameters in the
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// DASH manifest are the only ones in this system which are sensitive to
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// getting out of sync. This is specifically true for live content.
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this.parameters_.synchronizeClock = true;
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/** @private {!shaka.util.FailoverUri} */
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this.url_ = url;
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};
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/**
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* Sends the MPD request.
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*
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* @return {!Promise.<!shaka.dash.mpd.Mpd>}
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*/
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shaka.dash.MpdRequest.prototype.send = function() {
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var url = this.url_;
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return url.fetch(this.parameters_).then(
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/** @param {!ArrayBuffer|string} data */
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function(data) {
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var mpd = shaka.dash.mpd.parseMpd(
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/** @type {string} */ (data), url.urls);
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if (mpd) {
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return Promise.resolve(mpd);
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}
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var error = new Error('MPD parse failure.');
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error.type = 'mpd';
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return Promise.reject(error);
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}
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);
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};
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