Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 | 1x | /** * The copyright in this software is being made available under the BSD License, * included below. This software may be subject to other third party and contributor * rights, including patent rights, and no such rights are granted under this license. * * Copyright (c) 2013, Dash Industry Forum. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation and/or * other materials provided with the distribution. * * Neither the name of Dash Industry Forum nor the names of its * contributors may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /** * Initial implementation of EME * * Implemented by Google Chrome prior to v36 * * @implements ProtectionModel * @class */ import ProtectionKeyController from '../controllers/ProtectionKeyController.js'; import NeedKey from '../vo/NeedKey.js'; import DashJSError from '../../vo/DashJSError.js'; import KeyMessage from '../vo/KeyMessage.js'; import KeySystemConfiguration from '../vo/KeySystemConfiguration.js'; import KeySystemAccess from '../vo/KeySystemAccess.js'; import ProtectionErrors from '../errors/ProtectionErrors.js'; import FactoryMaker from '../../../core/FactoryMaker.js'; import ProtectionConstants from '../../constants/ProtectionConstants.js'; function ProtectionModel_01b(config) { config = config || {}; const context = this.context; const eventBus = config.eventBus;//Need to pass in here so we can use same instance since this is optional module const events = config.events; const debug = config.debug; const api = config.api; const errHandler = config.errHandler; let instance, logger, videoElement, keySystem, protectionKeyController, // With this version of the EME APIs, sessionIds are not assigned to // sessions until the first key message is received. We are assuming // that in the case of multiple sessions, key messages will be received // in the order that generateKeyRequest() is called. // Holding spot for newly-created sessions until we determine whether or // not the CDM supports sessionIds pendingSessions, // List of sessions that have been initialized. Only the first position will // be used in the case that the CDM does not support sessionIds sessionTokens, // Not all CDMs support the notion of sessionIds. Without sessionIds // there is no way for us to differentiate between sessions, therefore // we must only allow a single session. Once we receive the first key // message we can set this flag to determine if more sessions are allowed moreSessionsAllowed, // This is our main event handler for all desired HTMLMediaElement events // related to EME. These events are translated into our API-independent // versions of the same events eventHandler; function setup() { logger = debug.getLogger(instance); videoElement = null; keySystem = null; pendingSessions = []; sessionTokens = []; protectionKeyController = ProtectionKeyController(context).getInstance(); eventHandler = createEventHandler(); } function reset() { if (videoElement) { removeEventListeners(); } for (let i = 0; i < sessionTokens.length; i++) { closeKeySession(sessionTokens[i]); } eventBus.trigger(events.TEARDOWN_COMPLETE); } function getAllInitData() { const retVal = []; for (let i = 0; i < pendingSessions.length; i++) { retVal.push(pendingSessions[i].initData); } for (let i = 0; i < sessionTokens.length; i++) { retVal.push(sessionTokens[i].initData); } return retVal; } function getSessionTokens() { return sessionTokens.concat(pendingSessions); } function requestKeySystemAccess(ksConfigurations) { return new Promise((resolve, reject) => { let ve = videoElement; if (!ve) { // Must have a video element to do this capability tests ve = document.createElement('video'); } // Try key systems in order, first one with supported key system configuration // is used let found = false; for (let ksIdx = 0; ksIdx < ksConfigurations.length; ksIdx++) { const systemString = ksConfigurations[ksIdx].ks.systemString; const configs = ksConfigurations[ksIdx].configs; let supportedAudio = null; let supportedVideo = null; // Try key system configs in order, first one with supported audio/video // is used for (let configIdx = 0; configIdx < configs.length; configIdx++) { //let audios = configs[configIdx].audioCapabilities; const videos = configs[configIdx].videoCapabilities; // Look for supported video container/codecs if (videos && videos.length !== 0) { supportedVideo = []; // Indicates that we have a requested video config for (let videoIdx = 0; videoIdx < videos.length; videoIdx++) { if (ve.canPlayType(videos[videoIdx].contentType, systemString) !== '') { supportedVideo.push(videos[videoIdx]); } } } // No supported audio or video in this configuration OR we have // requested audio or video configuration that is not supported if ((!supportedAudio && !supportedVideo) || (supportedAudio && supportedAudio.length === 0) || (supportedVideo && supportedVideo.length === 0)) { continue; } // This configuration is supported found = true; const ksConfig = new KeySystemConfiguration(supportedAudio, supportedVideo); const ks = protectionKeyController.getKeySystemBySystemString(systemString); const keySystemAccess = new KeySystemAccess(ks, ksConfig) eventBus.trigger(events.KEY_SYSTEM_ACCESS_COMPLETE, { data: keySystemAccess }); resolve({ data: keySystemAccess }); break; } } if (!found) { const errorMessage = 'Key system access denied! -- No valid audio/video content configurations detected!'; eventBus.trigger(events.KEY_SYSTEM_ACCESS_COMPLETE, { error: errorMessage }); reject({ error: errorMessage }); } }) } function selectKeySystem(keySystemAccess) { keySystem = keySystemAccess.keySystem; return Promise.resolve(keySystem); } function setMediaElement(mediaElement) { if (videoElement === mediaElement) { return; } // Replacing the previous element if (videoElement) { removeEventListeners(); // Close any open sessions - avoids memory leak on LG webOS 2016/2017 TVs for (var i = 0; i < sessionTokens.length; i++) { closeKeySession(sessionTokens[i]); } sessionTokens = []; } videoElement = mediaElement; // Only if we are not detaching from the existing element if (videoElement) { videoElement.addEventListener(api.keyerror, eventHandler); videoElement.addEventListener(api.needkey, eventHandler); videoElement.addEventListener(api.keymessage, eventHandler); videoElement.addEventListener(api.keyadded, eventHandler); eventBus.trigger(events.VIDEO_ELEMENT_SELECTED); } } function createKeySession(ksInfo) { if (!keySystem) { throw new Error('Can not create sessions until you have selected a key system'); } // Determine if creating a new session is allowed if (moreSessionsAllowed || sessionTokens.length === 0) { const newSession = { // Implements SessionToken sessionId: null, keyId: ksInfo.keyId, normalizedKeyId: ksInfo && ksInfo.keyId && typeof ksInfo.keyId === 'string' ? ksInfo.keyId.replace(/-/g, '').toLowerCase() : '', initData: ksInfo.initData, hasTriggeredKeyStatusMapUpdate: false, getKeyId: function () { return this.keyId; }, getSessionId: function () { return this.sessionId; }, getExpirationTime: function () { return NaN; }, getSessionType: function () { return 'temporary'; }, getKeyStatuses: function () { return { size: 0, has: () => { return false }, get: () => { return undefined } } } }; pendingSessions.push(newSession); // Send our request to the CDM videoElement[api.generateKeyRequest](keySystem.systemString, new Uint8Array(ksInfo.initData)); return newSession; } else { throw new Error('Multiple sessions not allowed!'); } } function updateKeySession(sessionToken, message) { const sessionId = sessionToken.sessionId; if (!protectionKeyController.isClearKey(keySystem)) { // Send our request to the CDM videoElement[api.addKey](keySystem.systemString, new Uint8Array(message), new Uint8Array(sessionToken.initData), sessionId); } else { // For clearkey, message is a ClearKeyKeySet for (let i = 0; i < message.keyPairs.length; i++) { videoElement[api.addKey](keySystem.systemString, message.keyPairs[i].key, message.keyPairs[i].keyID, sessionId); } } eventBus.trigger(events.KEY_SESSION_UPDATED); } function closeKeySession(sessionToken) { // Send our request to the CDM try { videoElement[api.cancelKeyRequest](keySystem.systemString, sessionToken.sessionId); } catch (error) { eventBus.trigger(events.KEY_SESSION_CLOSED, { data: null, error: 'Error closing session (' + sessionToken.sessionId + ') ' + error.message }); } } function setServerCertificate(/*serverCertificate*/) { /* Not supported */ return Promise.resolve(); } function loadKeySession(/*ksInfo*/) { /* Not supported */ } function removeKeySession(/*sessionToken*/) { /* Not supported */ } function createEventHandler() { return { handleEvent: function (event) { let sessionToken = null; switch (event.type) { case api.needkey: let initData = ArrayBuffer.isView(event.initData) ? event.initData.buffer : event.initData; eventBus.trigger(events.NEED_KEY, { key: new NeedKey(initData, ProtectionConstants.INITIALIZATION_DATA_TYPE_CENC) }); break; case api.keyerror: sessionToken = findSessionByID(sessionTokens, event.sessionId); if (!sessionToken) { sessionToken = findSessionByID(pendingSessions, event.sessionId); } if (sessionToken) { let code = ProtectionErrors.MEDIA_KEYERR_CODE; let msg = ''; switch (event.errorCode.code) { case 1: code = ProtectionErrors.MEDIA_KEYERR_UNKNOWN_CODE; msg += 'MEDIA_KEYERR_UNKNOWN - ' + ProtectionErrors.MEDIA_KEYERR_UNKNOWN_MESSAGE; break; case 2: code = ProtectionErrors.MEDIA_KEYERR_CLIENT_CODE; msg += 'MEDIA_KEYERR_CLIENT - ' + ProtectionErrors.MEDIA_KEYERR_CLIENT_MESSAGE; break; case 3: code = ProtectionErrors.MEDIA_KEYERR_SERVICE_CODE; msg += 'MEDIA_KEYERR_SERVICE - ' + ProtectionErrors.MEDIA_KEYERR_SERVICE_MESSAGE; break; case 4: code = ProtectionErrors.MEDIA_KEYERR_OUTPUT_CODE; msg += 'MEDIA_KEYERR_OUTPUT - ' + ProtectionErrors.MEDIA_KEYERR_OUTPUT_MESSAGE; break; case 5: code = ProtectionErrors.MEDIA_KEYERR_HARDWARECHANGE_CODE; msg += 'MEDIA_KEYERR_HARDWARECHANGE - ' + ProtectionErrors.MEDIA_KEYERR_HARDWARECHANGE_MESSAGE; break; case 6: code = ProtectionErrors.MEDIA_KEYERR_DOMAIN_CODE; msg += 'MEDIA_KEYERR_DOMAIN - ' + ProtectionErrors.MEDIA_KEYERR_DOMAIN_MESSAGE; break; } msg += ' System Code = ' + event.systemCode; // TODO: Build error string based on key error eventBus.trigger(events.KEY_ERROR, { error: new DashJSError(code, msg, sessionToken) }); } else { logger.error('No session token found for key error'); } break; case api.keyadded: sessionToken = findSessionByID(sessionTokens, event.sessionId); if (!sessionToken) { sessionToken = findSessionByID(pendingSessions, event.sessionId); } if (sessionToken) { logger.debug('DRM: Key added.'); eventBus.trigger(events.KEY_ADDED, { data: sessionToken });//TODO not sure anything is using sessionToken? why there? } else { logger.debug('No session token found for key added'); } break; case api.keymessage: // If this CDM does not support session IDs, we will be limited // to a single session moreSessionsAllowed = (event.sessionId !== null) && (event.sessionId !== undefined); // SessionIDs supported if (moreSessionsAllowed) { // Attempt to find an uninitialized token with this sessionId sessionToken = findSessionByID(sessionTokens, event.sessionId); if (!sessionToken && pendingSessions.length > 0) { // This is the first message for our latest session, so set the // sessionId and add it to our list sessionToken = pendingSessions.shift(); sessionTokens.push(sessionToken); sessionToken.sessionId = event.sessionId; eventBus.trigger(events.KEY_SESSION_CREATED, { data: sessionToken }); } } else if (pendingSessions.length > 0) { // SessionIDs not supported sessionToken = pendingSessions.shift(); sessionTokens.push(sessionToken); if (pendingSessions.length !== 0) { errHandler.error(new DashJSError(ProtectionErrors.MEDIA_KEY_MESSAGE_ERROR_CODE, ProtectionErrors.MEDIA_KEY_MESSAGE_ERROR_MESSAGE)); } } if (sessionToken) { let message = ArrayBuffer.isView(event.message) ? event.message.buffer : event.message; // For ClearKey, the spec mandates that you pass this message to the // addKey method, so we always save it to the token since there is no // way to tell which key system is in use sessionToken.keyMessage = message; eventBus.trigger(events.INTERNAL_KEY_MESSAGE, { data: new KeyMessage(sessionToken, message, event.defaultURL) }); } else { logger.warn('No session token found for key message'); } break; } } }; } /** * Helper function to retrieve the stored session token based on a given * sessionId value * * @param {Array} sessionArray - the array of sessions to search * @param {*} sessionId - the sessionId to search for * @returns {*} the session token with the given sessionId */ function findSessionByID(sessionArray, sessionId) { if (!sessionId || !sessionArray) { return null; } else { const len = sessionArray.length; for (let i = 0; i < len; i++) { if (sessionArray[i].sessionId == sessionId) { return sessionArray[i]; } } return null; } } function removeEventListeners() { videoElement.removeEventListener(api.keyerror, eventHandler); videoElement.removeEventListener(api.needkey, eventHandler); videoElement.removeEventListener(api.keymessage, eventHandler); videoElement.removeEventListener(api.keyadded, eventHandler); } instance = { getAllInitData, getSessionTokens, requestKeySystemAccess, selectKeySystem, setMediaElement, createKeySession, updateKeySession, closeKeySession, setServerCertificate, loadKeySession, removeKeySession, stop: reset, reset }; setup(); return instance; } ProtectionModel_01b.__dashjs_factory_name = 'ProtectionModel_01b'; export default FactoryMaker.getClassFactory(ProtectionModel_01b); |