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 | 94x 94x 94x 94x 94x 94x 1x 1x 1x 2x 2x 2x 2x 2x 2x 1x 1x 2x 9x 5x 3x 1x 1x 1x 1x 1x 1x 82x 69x 13x 3x 13x 10x 3x 3x 8x 2x 1x 1x 4x 4x 4x 4x 4x 4x 4x 4x 4x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 12x 2x 10x 1x 1x 1x 1x 1x 1x 1x 4x 4x 3x 1x 1x 4x 4x 4x 4x 3x 3x 3x 2x 2x 2x 6x 1x 5x 5x 2x 2x 2x 2x 2x | import Event from '../events'; import TaskLoop from '../task-loop'; import { logger } from '../utils/logger'; import { ErrorTypes, ErrorDetails } from '../errors'; /** * @class AudioTrackController * @implements {EventHandler} * * Handles main manifest and audio-track metadata loaded, * owns and exposes the selectable audio-tracks data-models. * * Exposes internal interface to select available audio-tracks. * * Handles errors on loading audio-track playlists. Manages fallback mechanism * with redundants tracks (group-IDs). * * Handles level-loading and group-ID switches for video (fallback on video levels), * and eventually adapts the audio-track group-ID to match. * * @fires AUDIO_TRACK_LOADING * @fires AUDIO_TRACK_SWITCHING * @fires AUDIO_TRACKS_UPDATED * @fires ERROR * */ class AudioTrackController extends TaskLoop { constructor (hls) { super(hls, Event.MANIFEST_LOADING, Event.MANIFEST_PARSED, Event.AUDIO_TRACK_LOADED, Event.AUDIO_TRACK_SWITCHED, Event.LEVEL_LOADED, Event.ERROR ); /** * @private * Currently selected index in `tracks` * @member {number} trackId */ this._trackId = -1; /** * @private * If should select tracks according to default track attribute * @member {boolean} _selectDefaultTrack */ this._selectDefaultTrack = true; /** * @public * All tracks available * @member {AudioTrack[]} */ this.tracks = []; /** * @public * List of blacklisted audio track IDs (that have caused failure) * @member {number[]} */ this.trackIdBlacklist = Object.create(null); /** * @public * The currently running group ID for audio * (we grab this on manifest-parsed and new level-loaded) * @member {string} */ this.audioGroupId = null; } /** * Reset audio tracks on new manifest loading. */ onManifestLoading () { this.tracks = []; this._trackId = -1; this._selectDefaultTrack = true; } /** * Store tracks data from manifest parsed data. * * Trigger AUDIO_TRACKS_UPDATED event. * * @param {*} data */ onManifestParsed (data) { const tracks = this.tracks = data.audioTracks || []; this.hls.trigger(Event.AUDIO_TRACKS_UPDATED, { audioTracks: tracks }); } /** * Store track details of loaded track in our data-model. * * Set-up metadata update interval task for live-mode streams. * * @param {} data */ onAudioTrackLoaded (data) { Iif (data.id >= this.tracks.length) { logger.warn('Invalid audio track id:', data.id); return; } logger.log(`audioTrack ${data.id} loaded`); this.tracks[data.id].details = data.details; // check if current playlist is a live playlist // and if we have already our reload interval setup if (data.details.live && !this.hasInterval()) { // if live playlist we will have to reload it periodically // set reload period to playlist target duration const updatePeriodMs = data.details.targetduration * 1000; this.setInterval(updatePeriodMs); } Iif (!data.details.live && this.hasInterval()) { // playlist is not live and timer is scheduled: cancel it this.clearInterval(); } } /** * Update the internal group ID to any audio-track we may have set manually * or because of a failure-handling fallback. * * Quality-levels should update to that group ID in this case. * * @param {*} data */ onAudioTrackSwitched (data) { const audioGroupId = this.tracks[data.id].groupId; if (audioGroupId && (this.audioGroupId !== audioGroupId)) { this.audioGroupId = audioGroupId; } } /** * When a level gets loaded, if it has redundant audioGroupIds (in the same ordinality as it's redundant URLs) * we are setting our audio-group ID internally to the one set, if it is different from the group ID currently set. * * If group-ID got update, we re-select the appropriate audio-track with this group-ID matching the currently * selected one (based on NAME property). * * @param {*} data */ onLevelLoaded (data) { // FIXME: crashes because currentLevel is undefined // const levelInfo = this.hls.levels[this.hls.currentLevel]; const levelInfo = this.hls.levels[data.level]; Iif (!levelInfo.audioGroupIds) { return; } const audioGroupId = levelInfo.audioGroupIds[levelInfo.urlId]; Eif (this.audioGroupId !== audioGroupId) { this.audioGroupId = audioGroupId; this._selectInitialAudioTrack(); } } /** * Handle network errors loading audio track manifests * and also pausing on any netwok errors. * * @param {ErrorEventData} data */ onError (data) { // Only handle network errors if (data.type !== ErrorTypes.NETWORK_ERROR) { return; } // If fatal network error, cancel update task if (data.fatal) { this.clearInterval(); } // If not an audio-track loading error don't handle further if (data.details !== ErrorDetails.AUDIO_TRACK_LOAD_ERROR) { return; } logger.warn('Network failure on audio-track id:', data.context.id); this._handleLoadError(); } /** * @type {AudioTrack[]} Audio-track list we own */ get audioTracks () { return this.tracks; } /** * @type {number} Index into audio-tracks list of currently selected track. */ get audioTrack () { return this._trackId; } /** * Select current track by index */ set audioTrack (newId) { this._setAudioTrack(newId); // If audio track is selected from API then don't choose from the manifest default track this._selectDefaultTrack = false; } /** * @private * @param {number} newId */ _setAudioTrack (newId) { // noop on same audio track id as already set Iif (this._trackId === newId && this.tracks[this._trackId].details) { logger.debug('Same id as current audio-track passed, and track details available -> no-op'); return; } // check if level idx is valid Iif (newId < 0 || newId >= this.tracks.length) { logger.warn('Invalid id passed to audio-track controller'); return; } const audioTrack = this.tracks[newId]; logger.log(`Now switching to audio-track index ${newId}`); // stopping live reloading timer if any this.clearInterval(); this._trackId = newId; const { url, type, id } = audioTrack; this.hls.trigger(Event.AUDIO_TRACK_SWITCHING, { id, type, url }); this._loadTrackDetailsIfNeeded(audioTrack); } /** * @override */ doTick () { this._updateTrack(this._trackId); } /** * Select initial track * @private */ _selectInitialAudioTrack () { let tracks = this.tracks; Iif (!tracks.length) { return; } const currentAudioTrack = this.tracks[this._trackId]; let name = null; Eif (currentAudioTrack) { name = currentAudioTrack.name; } // Pre-select default tracks if there are any Iif (this._selectDefaultTrack) { const defaultTracks = tracks.filter((track) => track.default); if (defaultTracks.length) { tracks = defaultTracks; } else { logger.warn('No default audio tracks defined'); } } let trackFound = false; const traverseTracks = () => { // Select track with right group ID tracks.forEach((track) => { if (trackFound) { return; } // We need to match the (pre-)selected group ID // and the NAME of the current track. if ((!this.audioGroupId || track.groupId === this.audioGroupId) && (!name || name === track.name)) { // If there was a previous track try to stay with the same `NAME`. // It should be unique across tracks of same group, and consistent through redundant track groups. this._setAudioTrack(track.id); trackFound = true; } }); }; traverseTracks(); Eif (!trackFound) { name = null; traverseTracks(); } Iif (!trackFound) { logger.error(`No track found for running audio group-ID: ${this.audioGroupId}`); this.hls.trigger(Event.ERROR, { type: ErrorTypes.MEDIA_ERROR, details: ErrorDetails.AUDIO_TRACK_LOAD_ERROR, fatal: true }); } } /** * @private * @param {AudioTrack} audioTrack * @returns {boolean} */ _needsTrackLoading (audioTrack) { const { details } = audioTrack; if (!details) { return true; } else Eif (details.live) { return true; } } /** * @private * @param {AudioTrack} audioTrack */ _loadTrackDetailsIfNeeded (audioTrack) { Eif (this._needsTrackLoading(audioTrack)) { const { url, id } = audioTrack; // track not retrieved yet, or live playlist we need to (re)load it logger.log(`loading audio-track playlist for id: ${id}`); this.hls.trigger(Event.AUDIO_TRACK_LOADING, { url, id }); } } /** * @private * @param {number} newId */ _updateTrack (newId) { // check if level idx is valid if (newId < 0 || newId >= this.tracks.length) { return; } // stopping live reloading timer if any this.clearInterval(); this._trackId = newId; logger.log(`trying to update audio-track ${newId}`); const audioTrack = this.tracks[newId]; this._loadTrackDetailsIfNeeded(audioTrack); } /** * @private */ _handleLoadError () { // First, let's black list current track id this.trackIdBlacklist[this._trackId] = true; // Let's try to fall back on a functional audio-track with the same group ID const previousId = this._trackId; const { name, language, groupId } = this.tracks[previousId]; logger.warn(`Loading failed on audio track id: ${previousId}, group-id: ${groupId}, name/language: "${name}" / "${language}"`); // Find a non-blacklisted track ID with the same NAME // At least a track that is not blacklisted, thus on another group-ID. let newId = previousId; for (let i = 0; i < this.tracks.length; i++) { if (this.trackIdBlacklist[i]) { continue; } const newTrack = this.tracks[i]; if (newTrack.name === name) { newId = i; break; } } Iif (newId === previousId) { logger.warn(`No fallback audio-track found for name/language: "${name}" / "${language}"`); return; } logger.log('Attempting audio-track fallback id:', newId, 'group-id:', this.tracks[newId].groupId); this._setAudioTrack(newId); } } export default AudioTrackController; |