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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 | 1x 1x 1x 34x 34x 34x 34x 34x 34x 34x 34x 34x 34x 15x 34x 34x 34x 34x 34x 34x 2x 31x 30x 30x 30x 30x 30x 2x 1x 1x 3x 3x 30x 30x 64x 33x 33x 33x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 30x 1x 1x 1x 1x 1x 1x 1x 1x 35x 33x 33x 33x 33x 33x 33x 33x 33x 33x 35x 28x 5x 5x 9x 9x 1x 1x 8x 8x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 8x 8x 8x 8x 8x 8x 7x 7x 7x 7x 8x 8x 8x 8x 8x 8x 8x 8x 8x 24x 24x 24x 24x 23x 22x 22x 22x 22x 1x 1x 135x 79x 70x 70x 70x 88x 80x 8x 72x 72x 72x 57x 34x 34x 34x 1x 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.
*/
import Debug from '../core/Debug.js';
import DashJSError from './vo/DashJSError.js';
import FactoryMaker from '../core/FactoryMaker.js';
import Errors from '../core/errors/Errors.js';
import Settings from '../core/Settings.js';
import Constants from './constants/Constants.js';
import {HTTPRequest} from './vo/metrics/HTTPRequest.js';
import Events from '../core/events/Events.js';
import ExternalSourceBuffer from './ExternalSourceBuffer.js';
const APPEND_WINDOW_START_OFFSET = 0.1;
const APPEND_WINDOW_END_OFFSET = 0.01;
/**
* @class SourceBufferSink
* @ignore
* @implements FragmentSink
*/
const CHECK_INTERVAL = 50;
function SourceBufferSink(config) {
const context = this.context;
const settings = Settings(context).getInstance();
const textController = config.textController;
const eventBus = config.eventBus;
let instance,
type,
logger,
buffer,
mediaInfo,
intervalId;
let callbacks = [];
let appendQueue = [];
let isAppendingInProgress = false;
let mediaSource = config.mediaSource;
let lastRequestAppended = null;
function setup() {
logger = Debug(context).getInstance().getLogger(instance);
}
function _getCodecStringForRepresentation(representation) {
return representation.mimeType + ';codecs="' + representation.codecs + '"';
}
function initializeForStreamSwitch(mInfo, selectedRepresentation, oldSourceBufferSink) {
mediaInfo = mInfo;
type = mediaInfo.type;
_copyPreviousSinkData(oldSourceBufferSink);
_addEventListeners();
}
function changeType(representation) {
const codec = _getCodecStringForRepresentation(representation);
return new Promise((resolve) => {
_waitForUpdateEnd(() => {
if (buffer.changeType) {
logger.debug(`Changing SourceBuffer codec to ${codec}`);
buffer.changeType(codec);
}
resolve();
});
});
}
function _copyPreviousSinkData(oldSourceBufferSink) {
buffer = oldSourceBufferSink.getBuffer();
}
function initializeForFirstUse(mInfo, selectedRepresentation) {
mediaInfo = mInfo;
const streamInfo = mInfo.streamInfo;
type = mediaInfo.type;
const codec = selectedRepresentation ? _getCodecStringForRepresentation(selectedRepresentation) : mInfo.codec;
try {
// Safari claims to support anything starting 'application/mp4'.
// it definitely doesn't understand 'application/mp4;codecs="stpp"'
// - currently no browser does, so check for it and use our own
// implementation. The same is true for codecs="wvtt".
if (codec.match(/application\/mp4;\s*codecs="(stpp|wvtt).*"/i)) {
return _initializeForText(streamInfo);
}
buffer = mediaSource.addSourceBuffer(codec);
_addEventListeners();
const promises = [];
promises.push(updateAppendWindow(mediaInfo.streamInfo));
Iif (selectedRepresentation && selectedRepresentation.mseTimeOffset !== undefined) {
promises.push(updateTimestampOffset(selectedRepresentation.mseTimeOffset));
}
return Promise.all(promises);
} catch (e) {
// Note that in the following, the quotes are open to allow for extra text after stpp and wvtt
if ((mediaInfo.type == Constants.TEXT && !mediaInfo.isFragmented) || (codec.indexOf('codecs="stpp') !== -1) || (codec.indexOf('codecs="vtt') !== -1) || (codec.indexOf('text/vtt') !== -1)) {
return _initializeForText(streamInfo);
}
return Promise.reject(e);
}
}
function _initializeForText(streamInfo) {
buffer = textController.getTextSourceBuffer(streamInfo);
return Promise.resolve();
}
function _addEventListeners() {
// use updateend event if possible
Iif (typeof buffer.addEventListener === 'function') {
try {
buffer.addEventListener('updateend', _updateEndHandler, false);
buffer.addEventListener('error', _errHandler, false);
buffer.addEventListener('abort', _errHandler, false);
} catch (err) {
// use setInterval to periodically check if updating has been completed
intervalId = setInterval(_updateEndHandler, CHECK_INTERVAL);
}
} else {
// use setInterval to periodically check if updating has been completed
intervalId = setInterval(_updateEndHandler, CHECK_INTERVAL);
}
}
function getType() {
return type;
}
function removeEventListeners() {
try {
Iif (typeof buffer.removeEventListener === 'function') {
buffer.removeEventListener('updateend', _updateEndHandler, false);
buffer.removeEventListener('error', _errHandler, false);
buffer.removeEventListener('abort', _errHandler, false);
}
clearInterval(intervalId);
} catch (e) {
logger.error(e);
}
}
function updateAppendWindow(sInfo) {
return new Promise((resolve) => {
Iif (!buffer || !settings.get().streaming.buffer.useAppendWindow) {
resolve();
return;
}
_waitForUpdateEnd(() => {
try {
Iif (!buffer) {
resolve();
return;
}
let appendWindowEnd = mediaSource.duration;
let appendWindowStart = 0;
Iif (sInfo && !isNaN(sInfo.start) && !isNaN(sInfo.duration) && isFinite(sInfo.duration)) {
appendWindowEnd = sInfo.start + sInfo.duration;
}
Iif (sInfo && !isNaN(sInfo.start)) {
appendWindowStart = sInfo.start;
}
if (buffer.appendWindowEnd !== appendWindowEnd || buffer.appendWindowStart !== appendWindowStart) {
buffer.appendWindowStart = 0;
buffer.appendWindowEnd = appendWindowEnd + APPEND_WINDOW_END_OFFSET;
buffer.appendWindowStart = Math.max(appendWindowStart - APPEND_WINDOW_START_OFFSET, 0);
logger.debug(`Updated append window for ${mediaInfo.type}. Set start to ${buffer.appendWindowStart} and end to ${buffer.appendWindowEnd}`);
}
resolve();
} catch (e) {
logger.warn(`Failed to set append window`);
resolve();
}
});
});
}
function updateTimestampOffset(mseTimeOffset) {
return new Promise((resolve) => {
Iif (!buffer) {
resolve();
return;
}
_waitForUpdateEnd(() => {
try {
if (buffer.timestampOffset !== mseTimeOffset && !isNaN(mseTimeOffset)) {
buffer.timestampOffset = mseTimeOffset;
logger.debug(`Set MSE timestamp offset to ${mseTimeOffset}`);
}
resolve();
} catch (e) {
resolve();
}
});
});
}
function reset() {
if (buffer) {
try {
callbacks = [];
removeEventListeners();
isAppendingInProgress = false;
appendQueue = [];
if (!buffer.getClassName || buffer.getClassName() !== 'TextSourceBuffer') {
logger.debug(`Removing sourcebuffer from media source`);
mediaSource.removeSourceBuffer(buffer);
}
} catch (e) {
}
buffer = null;
}
lastRequestAppended = null;
}
function getBuffer() {
return buffer;
}
function getAllBufferRanges() {
try {
return buffer?.buffered;
} catch (e) {
logger.error('getAllBufferRanges exception: ' + e.message);
return null;
}
}
function append(chunk, request = null) {
return new Promise((resolve, reject) => {
if (!chunk) {
reject({
chunk: chunk,
error: new DashJSError(Errors.APPEND_ERROR_CODE, Errors.APPEND_ERROR_MESSAGE)
});
return;
}
appendQueue.push({ data: chunk, promise: { resolve, reject }, request });
_waitForUpdateEnd(_appendNextInQueue.bind(this));
});
}
function abortBeforeAppend() {
return new Promise((resolve) => {
_waitForUpdateEnd(() => {
// Save the append window, which is reset on abort().
const appendWindowStart = buffer.appendWindowStart;
const appendWindowEnd = buffer.appendWindowEnd;
if (buffer) {
buffer.abort();
buffer.appendWindowStart = appendWindowStart;
buffer.appendWindowEnd = appendWindowEnd;
}
resolve();
});
});
}
function remove(range) {
return new Promise((resolve, reject) => {
const start = range.start;
const end = range.end;
// make sure that the given time range is correct. Otherwise we will get InvalidAccessError
Iif (!((start >= 0) && (end > start))) {
resolve();
return;
}
_waitForUpdateEnd(function () {
try {
buffer.remove(start, end);
// updating is in progress, we should wait for it to complete before signaling that this operation is done
_waitForUpdateEnd(function () {
resolve({
from: start,
to: end,
unintended: false
});
Iif (range.resolve) {
range.resolve();
}
});
} catch (err) {
reject({
from: start,
to: end,
unintended: false,
error: new DashJSError(Errors.REMOVE_ERROR_CODE, Errors.REMOVE_ERROR_MESSAGE)
});
if (range.reject) {
range.reject(err);
}
}
});
});
}
function _appendNextInQueue() {
Iif (isAppendingInProgress) {
return;
}
if (appendQueue.length > 0) {
isAppendingInProgress = true;
const nextChunk = appendQueue[0];
appendQueue.splice(0, 1);
const afterSuccess = function () {
isAppendingInProgress = false;
Iif (appendQueue.length > 0) {
_appendNextInQueue.call(this);
}
// Init segments are cached. In any other case we dont need the chunk bytes anymore and can free the memory
Iif (nextChunk && nextChunk.data && nextChunk.data.segmentType && nextChunk.data.segmentType !== HTTPRequest.INIT_SEGMENT_TYPE) {
delete nextChunk.data.bytes;
}
nextChunk.promise.resolve({ chunk: nextChunk.data });
};
try {
lastRequestAppended = nextChunk.request;
Iif (nextChunk.data.bytes.byteLength === 0) {
afterSuccess.call(this);
} else {
try {
logger.debug(`Appending ${nextChunk.data.segmentType} from period ${nextChunk.data.streamId} to buffer. Request URL: ${nextChunk.request.url}, Representation: ID: ${nextChunk.data.representation.id}, bitrate: ${nextChunk.data.representation.bitrateInKbit}`)
} catch (e) {
}
Iif (buffer instanceof ExternalSourceBuffer) {
buffer.appendBuffer(nextChunk.data.bytes, nextChunk.data.start, nextChunk.data.end);
} else if (buffer.appendBuffer) {
buffer.appendBuffer(nextChunk.data.bytes);
} else E{
buffer.append(nextChunk.data.bytes, nextChunk.data);
}
// updating is in progress, we should wait for it to complete before signaling that this operation is done
_waitForUpdateEnd(afterSuccess.bind(this));
}
} catch (err) {
logger.fatal('SourceBuffer append failed "' + err + '"');
if (appendQueue.length > 0) {
_appendNextInQueue();
} else {
isAppendingInProgress = false;
}
delete nextChunk.data.bytes;
nextChunk.promise.reject({ chunk: nextChunk.data, error: new DashJSError(err.code, err.message) });
}
}
}
function abort() {
return new Promise((resolve) => {
try {
appendQueue = [];
if (mediaSource.readyState === 'open') {
_waitForUpdateEnd(() => {
try {
if (buffer) {
buffer.abort();
}
resolve();
} catch (e) {
resolve();
}
});
} else Iif (buffer && buffer.setTextTrack && mediaSource.readyState === 'ended') {
buffer.abort(); //The cues need to be removed from the TextSourceBuffer via a call to abort()
resolve();
} else {
resolve();
}
} catch (e) {
resolve();
}
});
}
function _executeCallback() {
if (callbacks.length > 0) {
if (!buffer.updating) {
const cb = callbacks.shift();
cb();
// Try to execute next callback if still not updating
_executeCallback();
}
}
}
function _updateEndHandler() {
// if updating is still in progress do nothing and wait for the next check again.
if (buffer.updating) {
return;
}
// updating is completed, now we can stop checking and resolve the promise
_executeCallback();
}
function _errHandler(e) {
const error = e.target || {};
_triggerEvent(Events.SOURCE_BUFFER_ERROR, { error, lastRequestAppended })
}
function _triggerEvent(eventType, data) {
let payload = data || {};
eventBus.trigger(eventType, payload, { streamId: mediaInfo.streamInfo.id, mediaType: type });
}
function _waitForUpdateEnd(callback) {
try {
callbacks.push(callback);
if (buffer && !buffer.updating) {
_executeCallback();
}
} catch (e) {
logger.error(e);
}
}
instance = {
abort,
abortBeforeAppend,
append,
changeType,
getAllBufferRanges,
getBuffer,
getType,
initializeForFirstUse,
initializeForStreamSwitch,
remove,
removeEventListeners,
reset,
updateAppendWindow,
updateTimestampOffset,
};
setup();
return instance;
}
SourceBufferSink.__dashjs_factory_name = 'SourceBufferSink';
const factory = FactoryMaker.getClassFactory(SourceBufferSink);
export default factory;
|