shaka-player
Version:
DASH/EME video player library
85 lines (75 loc) • 2.52 kB
JavaScript
/**
* @license
* Copyright 2016 Google Inc.
*
* 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.
*/
goog.provide('shaka.offline.indexeddb.V2StorageCell');
goog.require('shaka.offline.indexeddb.BaseStorageCell');
/**
* The V2StorageCell is for all stores that follow the shaka.externs V2 and V3
* offline types. V2 was introduced in Shaka Player v2.3.0 and quickly
* replaced with V3 in Shaka Player v2.3.2.
*
* Upgrading from V1 to V2 initially broke the database in a way that prevented
* adding new records. The problem was with the upgrade process, not with the
* database format. Once database upgrades were removed, we increased the
* database version to V3 and marked V2 as read-only. Therefore, V2 and V3
* databases can both be read by this cell.
*
* @implements {shaka.extern.StorageCell}
*/
shaka.offline.indexeddb.V2StorageCell = class
extends shaka.offline.indexeddb.BaseStorageCell {
/**
* @param {IDBDatabase} connection
* @param {string} segmentStore
* @param {string} manifestStore
* @param {boolean} isFixedKey
*/
constructor(connection, segmentStore, manifestStore, isFixedKey) {
super(connection, segmentStore, manifestStore);
/** @private {boolean} */
this.isFixedKey_ = isFixedKey;
}
/** @override */
hasFixedKeySpace() {
return this.isFixedKey_;
}
/** @override */
addSegments(segments) {
if (this.isFixedKey_) {
return this.rejectAdd(this.segmentStore_);
}
return this.add(this.segmentStore_, segments);
}
/** @override */
addManifests(manifests) {
if (this.isFixedKey_) {
return this.rejectAdd(this.manifestStore_);
}
return this.add(this.manifestStore_, manifests);
}
/**
* @override
* @param {shaka.extern.ManifestDB} old
* @return {shaka.extern.ManifestDB}
*/
convertManifest(old) {
// JSON serialization turns Infinity into null, so turn it back now.
if (old.expiration == null) {
old.expiration = Infinity;
}
return old;
}
};