setUri($audio); } else { $recognitionAudio->setContent($audio); } } elseif (is_resource($audio)) { $recognitionAudio->setContent(stream_get_contents($audio)); } else { throw new InvalidArgumentException( 'Given $audio is not valid. ' . 'Audio must be a RecognitionAudio ' . 'object, a string of bytes, a valid ' . 'Google Cloud Storage URI, or a resource.' ); } return $recognitionAudio; } /** * @param string $requestClass * @param iterable|resource|string $audio * @return mixed An iterable of StreamingRecognizeRequest instances matching the requested version of Speech */ private function createStreamingRequestsHelper($requestClass, $audio) { // First, convert string/resource audio into an iterable if (is_string($audio)) { $audio = [$audio]; } if (is_resource($audio)) { $audio = $this->createAudioStreamFromResource($audio); } // For each chuck in iterable $audio, convert to a request if necessary foreach ($audio as $audioChunk) { if (is_object($audioChunk) && $audioChunk instanceof $requestClass) { yield $audioChunk; } elseif (is_string($audioChunk)) { $request = new $requestClass(); $request->setAudioContent($audioChunk); yield $request; } else { throw new InvalidArgumentException( 'Found invalid audio chunk in $audio. ' . 'Audio must be a resource, a string of ' . 'bytes, or an iterable of StreamingRecognizeRequest[] ' . 'or string[].' ); } } } /** * Convert a PHP resource instance into an iterable of data "chunks". * * @param resource $resource The resource object to read data from. * @param int $chunkSize The chunk size to use, in bytes. Defaults to 32000 * @return \Generator An iterable of strings that have been read from the resource. */ public function createAudioStreamFromResource($resource, $chunkSize = 32000) { while (!feof($resource)) { $chunk = fread($resource, $chunkSize); if (strlen($chunk) > 0) { yield $chunk; } } } }