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| 1 | <?php |
| 2 | |
| 3 | namespace MediaWiki\Wikispeech\Api; |
| 4 | |
| 5 | /** |
| 6 | * @file |
| 7 | * @ingroup API |
| 8 | * @ingroup Extensions |
| 9 | * @license GPL-2.0-or-later |
| 10 | */ |
| 11 | |
| 12 | use ApiBase; |
| 13 | use ApiMain; |
| 14 | use ApiUsageException; |
| 15 | use Config; |
| 16 | use ConfigException; |
| 17 | use ExternalStoreException; |
| 18 | use FormatJson; |
| 19 | use InvalidArgumentException; |
| 20 | use MediaWiki\Http\HttpRequestFactory; |
| 21 | use MediaWiki\Logger\LoggerFactory; |
| 22 | use MediaWiki\MediaWikiServices; |
| 23 | use MediaWiki\Revision\RevisionStore; |
| 24 | use MediaWiki\Wikispeech\Segment\DeletedRevisionException; |
| 25 | use MediaWiki\Wikispeech\Segment\RemoteWikiPageProviderException; |
| 26 | use MediaWiki\Wikispeech\Segment\Segment; |
| 27 | use MediaWiki\Wikispeech\Segment\SegmentPageFactory; |
| 28 | use MediaWiki\Wikispeech\Segment\TextFilter\Sv\SwedishFilter; |
| 29 | use MediaWiki\Wikispeech\SpeechoidConnector; |
| 30 | use MediaWiki\Wikispeech\SpeechoidConnectorException; |
| 31 | use MediaWiki\Wikispeech\Utterance\UtteranceStore; |
| 32 | use MediaWiki\Wikispeech\VoiceHandler; |
| 33 | use MWException; |
| 34 | use MWTimestamp; |
| 35 | use Psr\Log\LoggerInterface; |
| 36 | use Throwable; |
| 37 | use WANObjectCache; |
| 38 | use Wikimedia\ParamValidator\ParamValidator; |
| 39 | |
| 40 | /** |
| 41 | * API module to synthezise text as sounds. |
| 42 | * |
| 43 | * Segments referenced by client are expected to have been created using |
| 44 | * the default configuration settings for segmentBreakingTags and removeTags. |
| 45 | * If not, segments might be incompatible, causing this API to not find |
| 46 | * the requested corresponding utterances. |
| 47 | * |
| 48 | * @since 0.1.3 |
| 49 | */ |
| 50 | class ApiWikispeechListen extends ApiBase { |
| 51 | |
| 52 | /** @var Config */ |
| 53 | private $config; |
| 54 | |
| 55 | /** @var WANObjectCache */ |
| 56 | private $cache; |
| 57 | |
| 58 | /** @var RevisionStore */ |
| 59 | private $revisionStore; |
| 60 | |
| 61 | /** @var HttpRequestFactory */ |
| 62 | private $requestFactory; |
| 63 | |
| 64 | /** @var LoggerInterface */ |
| 65 | private $logger; |
| 66 | |
| 67 | /** @var SpeechoidConnector */ |
| 68 | private $speechoidConnector; |
| 69 | |
| 70 | /** @var UtteranceStore */ |
| 71 | private $utteranceStore; |
| 72 | |
| 73 | /** @var VoiceHandler */ |
| 74 | private $voiceHandler; |
| 75 | |
| 76 | /** @var ListenMetricsEntry */ |
| 77 | private $listenMetricEntry; |
| 78 | |
| 79 | /** |
| 80 | * @since 0.1.5 |
| 81 | * @param ApiMain $mainModule |
| 82 | * @param string $moduleName |
| 83 | * @param WANObjectCache $cache |
| 84 | * @param RevisionStore $revisionStore |
| 85 | * @param HttpRequestFactory $requestFactory |
| 86 | * @param string $modulePrefix |
| 87 | */ |
| 88 | public function __construct( |
| 89 | ApiMain $mainModule, |
| 90 | string $moduleName, |
| 91 | WANObjectCache $cache, |
| 92 | RevisionStore $revisionStore, |
| 93 | HttpRequestFactory $requestFactory, |
| 94 | string $modulePrefix = '' |
| 95 | ) { |
| 96 | $this->config = $this->getConfig(); |
| 97 | $this->cache = $cache; |
| 98 | $this->revisionStore = $revisionStore; |
| 99 | $this->requestFactory = $requestFactory; |
| 100 | $this->logger = LoggerFactory::getInstance( 'Wikispeech' ); |
| 101 | $this->config = MediaWikiServices::getInstance() |
| 102 | ->getConfigFactory() |
| 103 | ->makeConfig( 'wikispeech' ); |
| 104 | $this->speechoidConnector = new SpeechoidConnector( |
| 105 | $this->config, |
| 106 | $requestFactory |
| 107 | ); |
| 108 | $this->utteranceStore = new UtteranceStore(); |
| 109 | $cache = MediaWikiServices::getInstance()->getMainWANObjectCache(); |
| 110 | $this->voiceHandler = new VoiceHandler( |
| 111 | $this->logger, |
| 112 | $this->config, |
| 113 | $this->speechoidConnector, |
| 114 | $cache |
| 115 | ); |
| 116 | $this->listenMetricEntry = new ListenMetricsEntry(); |
| 117 | parent::__construct( $mainModule, $moduleName, $modulePrefix ); |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * Execute an API request. |
| 122 | * |
| 123 | * @since 0.1.3 |
| 124 | */ |
| 125 | public function execute() { |
| 126 | $started = microtime( true ); |
| 127 | $this->listenMetricEntry->setTimestamp( MWTimestamp::getInstance() ); |
| 128 | |
| 129 | $inputParameters = $this->extractRequestParams(); |
| 130 | $this->validateParameters( $inputParameters ); |
| 131 | |
| 132 | $language = $inputParameters['lang']; |
| 133 | $voice = $inputParameters['voice']; |
| 134 | if ( !$voice ) { |
| 135 | $voice = $this->voiceHandler->getDefaultVoice( $language ); |
| 136 | if ( !$voice ) { |
| 137 | throw new ConfigException( 'Invalid default voice configuration.' ); |
| 138 | } |
| 139 | } |
| 140 | if ( isset( $inputParameters['revision'] ) ) { |
| 141 | $response = $this->getUtteranceForRevisionAndSegment( |
| 142 | $voice, |
| 143 | $language, |
| 144 | $inputParameters['revision'], |
| 145 | $inputParameters['segment'], |
| 146 | $inputParameters['consumer-url'] |
| 147 | ); |
| 148 | } else { |
| 149 | try { |
| 150 | $speechoidResponse = $this->speechoidConnector->synthesize( |
| 151 | $language, |
| 152 | $voice, |
| 153 | $inputParameters |
| 154 | ); |
| 155 | } catch ( Throwable $exception ) { |
| 156 | $this->dieWithException( $exception ); |
| 157 | } |
| 158 | $response = [ |
| 159 | // @phan-suppress-next-line PhanTypeArraySuspiciousNullable Phan doesn't understand dieWithException() |
| 160 | 'audio' => $speechoidResponse['audio_data'], |
| 161 | // @phan-suppress-next-line PhanTypeArraySuspiciousNullable Phan doesn't understand dieWithException() |
| 162 | 'tokens' => $speechoidResponse['tokens'] |
| 163 | ]; |
| 164 | } |
| 165 | $this->getResult()->addValue( |
| 166 | null, |
| 167 | $this->getModuleName(), |
| 168 | $response |
| 169 | ); |
| 170 | |
| 171 | $charactersInSegment = 0; |
| 172 | foreach ( $response['tokens'] as $token ) { |
| 173 | $charactersInSegment += mb_strlen( $token['orth'] ); |
| 174 | // whitespace and sentence ends counts too |
| 175 | $charactersInSegment += 1; |
| 176 | } |
| 177 | $this->listenMetricEntry->setCharactersInSegment( $charactersInSegment ); |
| 178 | $this->listenMetricEntry->setLanguage( $inputParameters['lang'] ); |
| 179 | $this->listenMetricEntry->setVoice( $voice ); |
| 180 | $this->listenMetricEntry->setPageRevisionId( $inputParameters['revision'] ); |
| 181 | $this->listenMetricEntry->setSegmentHash( $inputParameters['segment'] ); |
| 182 | $this->listenMetricEntry->setConsumerUrl( $inputParameters['consumer-url'] ); |
| 183 | $this->listenMetricEntry->setRemoteWikiHash( |
| 184 | UtteranceStore::evaluateRemoteWikiHash( $inputParameters['consumer-url'] ) |
| 185 | ); |
| 186 | $this->listenMetricEntry->setMillisecondsSpeechInUtterance( |
| 187 | $response['tokens'][count( $response['tokens'] ) - 1]['endtime'] |
| 188 | ); |
| 189 | $this->listenMetricEntry->setMicrosecondsSpent( intval( 1000000 * ( microtime( true ) - $started ) ) ); |
| 190 | |
| 191 | // All other metrics fields has been set in other functions of this class. |
| 192 | |
| 193 | if ( !$inputParameters['skip-journal-metrics'] |
| 194 | && $this->config->get( 'WikispeechListenDoJournalMetrics' ) ) { |
| 195 | $metricsJournal = new ListenMetricsEntryFileJournal( $this->config ); |
| 196 | try { |
| 197 | $metricsJournal->appendEntry( $this->listenMetricEntry ); |
| 198 | } catch ( Throwable $exception ) { |
| 199 | // Catch everything. This should not bother the user! |
| 200 | $this->logger->warning( |
| 201 | 'Exception caught while appending to metrics journal {exception}', |
| 202 | [ 'exception' => $exception ] |
| 203 | ); |
| 204 | } |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Retrieves the matching utterance for a given revision id and segment hash . |
| 210 | * |
| 211 | * @since 0.1.5 |
| 212 | * @param string $voice |
| 213 | * @param string $language |
| 214 | * @param int $revisionId |
| 215 | * @param string $segmentHash |
| 216 | * @param string|null $consumerUrl URL to the script path on the consumer, if used as a producer. |
| 217 | * @return array An utterance |
| 218 | */ |
| 219 | private function getUtteranceForRevisionAndSegment( |
| 220 | string $voice, |
| 221 | string $language, |
| 222 | int $revisionId, |
| 223 | string $segmentHash, |
| 224 | string $consumerUrl = null |
| 225 | ): array { |
| 226 | $segmentPageFactory = new SegmentPageFactory( |
| 227 | $this->cache, |
| 228 | // todo inject config factory |
| 229 | MediaWikiServices::getInstance()->getConfigFactory() |
| 230 | ); |
| 231 | try { |
| 232 | $segmentPageResponse = $segmentPageFactory |
| 233 | ->setSegmentBreakingTags( null ) |
| 234 | ->setRemoveTags( null ) |
| 235 | ->setUseSegmentsCache( true ) |
| 236 | ->setUseRevisionPropertiesCache( true ) |
| 237 | ->setContextSource( $this->getContext() ) |
| 238 | ->setRevisionStore( $this->revisionStore ) |
| 239 | ->setHttpRequestFactory( $this->requestFactory ) |
| 240 | ->setConsumerUrl( $consumerUrl ) |
| 241 | ->setRequirePageRevisionProperties( true ) |
| 242 | ->segmentPage( |
| 243 | null, |
| 244 | $revisionId |
| 245 | ); |
| 246 | } catch ( RemoteWikiPageProviderException $remoteWikiPageProviderException ) { |
| 247 | $this->dieWithError( [ |
| 248 | 'apierror-wikispeech-listen-failed-getting-page-from-consumer', |
| 249 | $revisionId, |
| 250 | $consumerUrl |
| 251 | ] ); |
| 252 | } catch ( DeletedRevisionException $deletedRevisionException ) { |
| 253 | $this->dieWithError( 'apierror-wikispeech-listen-deleted-revision' ); |
| 254 | } |
| 255 | $segment = $segmentPageResponse->getSegments()->findFirstItemByHash( $segmentHash ); |
| 256 | if ( $segment === null ) { |
| 257 | throw new MWException( 'No such segment. ' . |
| 258 | 'Did you perhaps reference a segment that was created using incompatible settings ' . |
| 259 | 'for segmentBreakingTags and/or removeTags?' ); |
| 260 | } |
| 261 | $pageId = $segmentPageResponse->getPageId(); |
| 262 | if ( $pageId === null ) { |
| 263 | throw new MWException( 'Did not retrieve page id for the given revision id.' ); |
| 264 | } |
| 265 | |
| 266 | $this->listenMetricEntry->setSegmentIndex( $segmentPageResponse->getSegments()->indexOf( $segment ) ); |
| 267 | $this->listenMetricEntry->setPageId( $pageId ); |
| 268 | $this->listenMetricEntry->setPageTitle( $segmentPageResponse->getTitle()->getText() ); |
| 269 | |
| 270 | return $this->getUtterance( |
| 271 | $consumerUrl, |
| 272 | $voice, |
| 273 | $language, |
| 274 | $pageId, |
| 275 | $segment |
| 276 | ); |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * Validate input text. |
| 281 | * |
| 282 | * @since 0.1.5 |
| 283 | * @param string $text |
| 284 | * @throws ApiUsageException |
| 285 | */ |
| 286 | private function validateText( $text ) { |
| 287 | $numberOfCharactersInInput = mb_strlen( $text ); |
| 288 | $maximumNumberOfCharacterInInput = |
| 289 | $this->config->get( 'WikispeechListenMaximumInputCharacters' ); |
| 290 | if ( $numberOfCharactersInInput > $maximumNumberOfCharacterInInput ) { |
| 291 | $this->dieWithError( [ |
| 292 | 'apierror-wikispeech-listen-invalid-input-too-long', |
| 293 | $maximumNumberOfCharacterInInput, |
| 294 | $numberOfCharactersInInput |
| 295 | ] ); |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * Return the utterance corresponding to the request. |
| 301 | * |
| 302 | * These are either retrieved from storage or synthesize (and then stored). |
| 303 | * |
| 304 | * @since 0.1.5 |
| 305 | * @param string|null $consumerUrl |
| 306 | * @param string $voice |
| 307 | * @param string $language |
| 308 | * @param int $pageId |
| 309 | * @param Segment $segment |
| 310 | * @return array Containing base64 'audio' and synthesisMetadata 'tokens'. |
| 311 | * @throws ExternalStoreException |
| 312 | * @throws ConfigException |
| 313 | * @throws InvalidArgumentException |
| 314 | * @throws SpeechoidConnectorException |
| 315 | */ |
| 316 | private function getUtterance( |
| 317 | ?string $consumerUrl, |
| 318 | string $voice, |
| 319 | string $language, |
| 320 | int $pageId, |
| 321 | Segment $segment |
| 322 | ) { |
| 323 | if ( $pageId !== 0 && !$pageId ) { |
| 324 | throw new InvalidArgumentException( 'Page ID must be set.' ); |
| 325 | } |
| 326 | $segmentHash = $segment->getHash(); |
| 327 | if ( $segmentHash === null ) { |
| 328 | throw new InvalidArgumentException( 'Segment hash must be set.' ); |
| 329 | } |
| 330 | if ( !$voice ) { |
| 331 | $voice = $this->voiceHandler->getDefaultVoice( $language ); |
| 332 | if ( !$voice ) { |
| 333 | throw new ConfigException( "Invalid default voice configuration." ); |
| 334 | } |
| 335 | } |
| 336 | $utterance = $this->utteranceStore->findUtterance( |
| 337 | $consumerUrl, |
| 338 | $pageId, |
| 339 | $language, |
| 340 | $voice, |
| 341 | $segmentHash |
| 342 | ); |
| 343 | |
| 344 | $this->listenMetricEntry->setUtteranceSynthesized( $utterance === null ); |
| 345 | |
| 346 | if ( !$utterance ) { |
| 347 | $this->logger->debug( __METHOD__ . ': Creating new utterance for {pageId} {segmentHash}', [ |
| 348 | 'pageId' => $pageId, |
| 349 | 'segmentHash' => $segment->getHash() |
| 350 | ] ); |
| 351 | |
| 352 | // Make a string of all the segment contents. |
| 353 | $segmentText = ''; |
| 354 | foreach ( $segment->getContent() as $content ) { |
| 355 | $segmentText .= $content->getString(); |
| 356 | } |
| 357 | $this->validateText( $segmentText ); |
| 358 | |
| 359 | /** @var string $ssml text/xml Speech Synthesis Markup Language */ |
| 360 | $ssml = null; |
| 361 | if ( $language === 'sv' ) { |
| 362 | // @todo implement a per language selecting content text filter facade |
| 363 | $textFilter = new SwedishFilter( $segmentText ); |
| 364 | $ssml = $textFilter->process(); |
| 365 | } |
| 366 | if ( $ssml !== null ) { |
| 367 | $speechoidResponse = $this->speechoidConnector->synthesize( |
| 368 | $language, |
| 369 | $voice, |
| 370 | [ 'ssml' => $ssml ] |
| 371 | ); |
| 372 | } else { |
| 373 | $speechoidResponse = $this->speechoidConnector->synthesizeText( |
| 374 | $language, |
| 375 | $voice, |
| 376 | $segmentText |
| 377 | ); |
| 378 | } |
| 379 | $this->utteranceStore->createUtterance( |
| 380 | $consumerUrl, |
| 381 | $pageId, |
| 382 | $language, |
| 383 | $voice, |
| 384 | $segmentHash, |
| 385 | $speechoidResponse['audio_data'], |
| 386 | FormatJson::encode( |
| 387 | $speechoidResponse['tokens'] |
| 388 | ) |
| 389 | ); |
| 390 | return [ |
| 391 | 'audio' => $speechoidResponse['audio_data'], |
| 392 | 'tokens' => $speechoidResponse['tokens'] |
| 393 | ]; |
| 394 | } |
| 395 | $this->logger->debug( __METHOD__ . ': Using cached utterance for {pageId} {segmentHash}', [ |
| 396 | 'pageId' => $pageId, |
| 397 | 'segmentHash' => $segmentHash |
| 398 | ] ); |
| 399 | return [ |
| 400 | 'audio' => $utterance->getAudio(), |
| 401 | 'tokens' => FormatJson::parse( |
| 402 | // @phan-suppress-next-line PhanTypeMismatchArgumentNullable synthesis metadata is set |
| 403 | $utterance->getSynthesisMetadata(), |
| 404 | FormatJson::FORCE_ASSOC |
| 405 | )->getValue() |
| 406 | ]; |
| 407 | } |
| 408 | |
| 409 | /** |
| 410 | * Validate the parameters for language and voice. |
| 411 | * |
| 412 | * The parameter values are checked against the extension |
| 413 | * configuration. These may differ from what is actually running |
| 414 | * on the Speechoid service. |
| 415 | * |
| 416 | * @since 0.1.3 |
| 417 | * @param array $parameters Request parameters. |
| 418 | * @throws ApiUsageException |
| 419 | */ |
| 420 | private function validateParameters( $parameters ) { |
| 421 | if ( |
| 422 | isset( $parameters['consumer-url'] ) && |
| 423 | !$this->config->get( 'WikispeechProducerMode' ) ) { |
| 424 | $this->dieWithError( 'apierror-wikispeech-consumer-not-allowed' ); |
| 425 | } |
| 426 | if ( |
| 427 | isset( $parameters['revision'] ) && |
| 428 | !isset( $parameters['segment'] ) |
| 429 | ) { |
| 430 | $this->dieWithError( [ |
| 431 | 'apierror-invalidparammix-mustusewith', |
| 432 | 'revision', |
| 433 | 'segment' |
| 434 | ] ); |
| 435 | } |
| 436 | if ( |
| 437 | isset( $parameters['segment'] ) && |
| 438 | !isset( $parameters['revision'] ) |
| 439 | ) { |
| 440 | $this->dieWithError( [ |
| 441 | 'apierror-invalidparammix-mustusewith', |
| 442 | 'segment', |
| 443 | 'revision' |
| 444 | ] ); |
| 445 | } |
| 446 | $this->requireOnlyOneParameter( |
| 447 | $parameters, |
| 448 | 'revision', |
| 449 | 'text', |
| 450 | 'ipa' |
| 451 | ); |
| 452 | $voices = $this->config->get( 'WikispeechVoices' ); |
| 453 | $language = $parameters['lang']; |
| 454 | |
| 455 | // Validate language. |
| 456 | $validLanguages = array_keys( $voices ); |
| 457 | if ( !in_array( $language, $validLanguages ) ) { |
| 458 | $this->dieWithError( [ |
| 459 | 'apierror-wikispeech-listen-invalid-language', |
| 460 | $language, |
| 461 | self::makeValuesString( $validLanguages ) |
| 462 | ] ); |
| 463 | } |
| 464 | |
| 465 | // Validate voice. |
| 466 | $voice = $parameters['voice']; |
| 467 | if ( $voice ) { |
| 468 | $validVoices = $voices[$language]; |
| 469 | if ( !in_array( $voice, $validVoices ) ) { |
| 470 | $this->dieWithError( [ |
| 471 | 'apierror-wikispeech-listen-invalid-voice', |
| 472 | $voice, |
| 473 | self::makeValuesString( $validVoices ) |
| 474 | ] ); |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | // Validate input text. |
| 479 | $input = $parameters['text'] ?? ''; |
| 480 | $this->validateText( $input ); |
| 481 | } |
| 482 | |
| 483 | /** |
| 484 | * Make a formatted string of values to be used in messages. |
| 485 | * |
| 486 | * @since 0.1.3 |
| 487 | * @param array $values Values as strings. |
| 488 | * @return string The input strings wrapped in <kbd> tags and |
| 489 | * joined by commas. |
| 490 | */ |
| 491 | private static function makeValuesString( $values ) { |
| 492 | $valueStrings = []; |
| 493 | foreach ( $values as $value ) { |
| 494 | $valueStrings[] = "<kbd>$value</kbd>"; |
| 495 | } |
| 496 | return implode( ', ', $valueStrings ); |
| 497 | } |
| 498 | |
| 499 | /** |
| 500 | * Specify what parameters the API accepts. |
| 501 | * |
| 502 | * @since 0.1.3 |
| 503 | * @return array |
| 504 | */ |
| 505 | public function getAllowedParams() { |
| 506 | return array_merge( |
| 507 | parent::getAllowedParams(), |
| 508 | [ |
| 509 | 'lang' => [ |
| 510 | ParamValidator::PARAM_TYPE => 'string', |
| 511 | ParamValidator::PARAM_REQUIRED => true |
| 512 | ], |
| 513 | 'text' => [ |
| 514 | ParamValidator::PARAM_TYPE => 'string' |
| 515 | ], |
| 516 | 'ipa' => [ |
| 517 | ParamValidator::PARAM_TYPE => 'string' |
| 518 | ], |
| 519 | 'revision' => [ |
| 520 | ParamValidator::PARAM_TYPE => 'integer' |
| 521 | ], |
| 522 | 'segment' => [ |
| 523 | ParamValidator::PARAM_TYPE => 'string' |
| 524 | ], |
| 525 | 'voice' => [ |
| 526 | ParamValidator::PARAM_TYPE => 'string' |
| 527 | ], |
| 528 | 'consumer-url' => [ |
| 529 | ParamValidator::PARAM_TYPE => 'string' |
| 530 | ], |
| 531 | 'skip-journal-metrics' => [ |
| 532 | ParamValidator::PARAM_TYPE => 'boolean', |
| 533 | ParamValidator::PARAM_DEFAULT => false |
| 534 | ] |
| 535 | ] |
| 536 | ); |
| 537 | } |
| 538 | |
| 539 | /** |
| 540 | * Give examples of usage. |
| 541 | * |
| 542 | * @since 0.1.3 |
| 543 | * @return array |
| 544 | */ |
| 545 | public function getExamplesMessages() { |
| 546 | return [ |
| 547 | 'action=wikispeech-listen&format=json&lang=en&text=Read this' |
| 548 | => 'apihelp-wikispeech-listen-example-1', |
| 549 | 'action=wikispeech-listen&format=json&lang=en&text=Read this&voice=cmu-slt-hsmm' |
| 550 | => 'apihelp-wikispeech-listen-example-2', |
| 551 | 'action=wikispeech-listen&format=json&lang=en&revision=1&segment=hash1234' |
| 552 | => 'apihelp-wikispeech-listen-example-3', |
| 553 | // phpcs:ignore Generic.Files.LineLength |
| 554 | 'action=wikispeech-listen&format=json&lang=en&revision=1&segment=hash1234&consumer-url=https://consumer.url/w' |
| 555 | => 'apihelp-wikispeech-listen-example-4', |
| 556 | ]; |
| 557 | } |
| 558 | } |