rx-player
Version:
Canal+ HTML5 Video Player
216 lines (215 loc) • 12.1 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.
*/
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
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case 4: _.label++; return { value: op[1], done: false };
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = createSession;
var log_1 = require("../../log");
var is_session_usable_1 = require("./utils/is_session_usable");
/**
* Create a new Session or load a persistent one on the given MediaKeys,
* according to wanted settings and what is currently stored.
*
* If session creating fails, remove the oldest MediaKeySession loaded and
* retry.
*
* /!\ This only creates new sessions.
* It will fail if loadedSessionsStore already has a MediaKeySession with
* the given initialization data.
* @param {Object} stores
* @param {Object} initData
* @param {string} wantedSessionType
* @param {Object} cancelSignal
* @returns {Promise}
*/
function createSession(stores, initData, wantedSessionType, cancelSignal) {
var loadedSessionsStore = stores.loadedSessionsStore, persistentSessionsStore = stores.persistentSessionsStore;
if (wantedSessionType === "temporary") {
return createTemporarySession(loadedSessionsStore, initData);
}
else if (persistentSessionsStore === null) {
log_1.default.warn("DRM: Cannot create persistent MediaKeySession, " +
"PersistentSessionsStore not created.");
return createTemporarySession(loadedSessionsStore, initData);
}
return createAndTryToRetrievePersistentSession(loadedSessionsStore, persistentSessionsStore, initData, cancelSignal);
}
/**
* Create a new temporary MediaKeySession linked to the given initData and
* initDataType.
* @param {Object} loadedSessionsStore
* @param {Object} initData
* @returns {Promise}
*/
function createTemporarySession(loadedSessionsStore, initData) {
log_1.default.info("DRM: Creating a new temporary session");
var entry = loadedSessionsStore.createSession(initData, "temporary");
return Promise.resolve({
type: "created-session" /* MediaKeySessionLoadingType.Created */,
value: entry,
});
}
/**
* Create a persistent MediaKeySession and try to load on it a previous
* MediaKeySession linked to the same initialization data.
* @param {Object} loadedSessionsStore
* @param {Object} persistentSessionsStore
* @param {Object} initData
* @param {Object} cancelSignal
* @returns {Promise}
*/
function createAndTryToRetrievePersistentSession(loadedSessionsStore, persistentSessionsStore, initData, cancelSignal) {
return __awaiter(this, void 0, void 0, function () {
/**
* Helper function to close and restart the current persistent session
* considered, and re-create it from scratch.
* @returns {Promise.<Object>}
*/
function recreatePersistentSession() {
return __awaiter(this, void 0, void 0, function () {
var persistentEntry, err_2, newEntry;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (cancelSignal.cancellationError !== null) {
throw cancelSignal.cancellationError;
}
log_1.default.info("DRM: Removing previous persistent session.");
persistentEntry = persistentSessionsStore.get(initData);
if (persistentEntry !== null) {
persistentSessionsStore.delete(persistentEntry.sessionId);
}
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
return [4 /*yield*/, loadedSessionsStore.closeSession(entry.mediaKeySession)];
case 2:
_a.sent();
return [3 /*break*/, 4];
case 3:
err_2 = _a.sent();
// From reading the EME specification in details, it seems that a
// `MediaKeySession`'s ability to be closed is tightly linked to its
// possession of a "sanitized session ID" set as `sessionId`.
// This is never clearly stated however and I'm (Paul B.) always afraid of
// breaking compatibility when it comes to EME code.
// So we still try to close the `MediaKeySession` in any case, only, if it
// fails and it didn't had any `sessionId` set, we just ignore the error.
// Note that trying to close the `MediaKeySession` might incur some delays
// in those rare cases.
if (entry.mediaKeySession.sessionId !== "") {
throw err_2;
}
loadedSessionsStore.removeSessionWithoutClosingIt(entry.mediaKeySession);
return [3 /*break*/, 4];
case 4:
if (cancelSignal.cancellationError !== null) {
throw cancelSignal.cancellationError;
}
newEntry = loadedSessionsStore.createSession(initData, "persistent-license");
return [2 /*return*/, { type: "created-session" /* MediaKeySessionLoadingType.Created */, value: newEntry }];
}
});
});
}
var entry, storedEntry, hasLoadedSession, newEntry, err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
if (cancelSignal.cancellationError !== null) {
throw cancelSignal.cancellationError;
}
log_1.default.info("DRM: Creating persistent MediaKeySession");
entry = loadedSessionsStore.createSession(initData, "persistent-license");
storedEntry = persistentSessionsStore.getAndReuse(initData);
if (storedEntry === null) {
return [2 /*return*/, { type: "created-session" /* MediaKeySessionLoadingType.Created */, value: entry }];
}
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
return [4 /*yield*/, loadedSessionsStore.loadPersistentSession(entry.mediaKeySession, storedEntry.sessionId)];
case 2:
hasLoadedSession = _a.sent();
if (!hasLoadedSession) {
log_1.default.warn("DRM: No data stored for the loaded session");
persistentSessionsStore.delete(storedEntry.sessionId);
// The EME specification is kind of implicit about it but it seems from my
// understanding (Paul B.) that a MediaKeySession on wich a `load` attempt
// did not succeed due to the loaded session not being found by the
// browser/CDM, should neither be used anymore nor closed.
// Thus, we're creating another `"persistent-license"` `MediaKeySession`
// in that specific case.
loadedSessionsStore.removeSessionWithoutClosingIt(entry.mediaKeySession);
newEntry = loadedSessionsStore.createSession(initData, "persistent-license");
return [2 /*return*/, { type: "created-session" /* MediaKeySessionLoadingType.Created */, value: newEntry }];
}
if (hasLoadedSession && (0, is_session_usable_1.default)(entry.mediaKeySession)) {
persistentSessionsStore.add(initData, initData.keyIds, entry.mediaKeySession);
log_1.default.info("DRM: Succeeded to load persistent session.");
return [2 /*return*/, {
type: "loaded-persistent-session" /* MediaKeySessionLoadingType.LoadedPersistentSession */,
value: entry,
}];
}
// Unusable persistent session: recreate a new session from scratch.
log_1.default.warn("DRM: Previous persistent session not usable anymore.");
return [2 /*return*/, recreatePersistentSession()];
case 3:
err_1 = _a.sent();
log_1.default.warn("DRM: Unable to load persistent session: " +
(err_1 instanceof Error ? err_1.toString() : "Unknown Error"));
return [2 /*return*/, recreatePersistentSession()];
case 4: return [2 /*return*/];
}
});
});
}