Amazon Polly
Guía para desarrolladores

Ejemplo de iOS

El ejemplo siguiente utiliza el SDK para iOS de Amazon Polly para leer el texto especificado con una voz seleccionada en una lista de voces.

El código que se muestra aquí incluye la mayoría de las tareas, pero no administra errores. Para ver el código completo, consulte la demostración de Amazon Polly con AWS SDK para iOS.

Initialize

// Region of Amazon Polly. let AwsRegion = AWSRegionType.usEast1 // Cognito pool ID. Pool needs to be unauthenticated pool with // Amazon Polly permissions. let CognitoIdentityPoolId = "YourCognitoIdentityPoolId" // Initialize the Amazon Cognito credentials provider. let credentialProvider = AWSCognitoCredentialsProvider(regionType: AwsRegion, identityPoolId: CognitoIdentityPoolId) // Create an audio player var audioPlayer = AVPlayer()

Obtener la lista de voces disponibles

// Use the configuration as default AWSServiceManager.default().defaultServiceConfiguration = configuration // Get all the voices (no parameters specified in input) from Amazon Polly // This creates an async task. let task = AWSPolly.default().describeVoices(AWSPollyDescribeVoicesInput()) // When the request is done, asynchronously do the following block // (we ignore all the errors, but in a real-world scenario they need // to be handled) task.continue(successBlock: { (awsTask: AWSTask) -> Any? in // awsTask.result is an instance of AWSPollyDescribeVoicesOutput in // case of the "describeVoices" method let voices = (awsTask.result! as AWSPollyDescribeVoicesOutput).voices return nil })

Realizar la síntesis de voz

// First, Amazon Polly requires an input, which we need to prepare. // Again, we ignore the errors, however this should be handled in // real applications. Here we are using the URL Builder Request, // since in order to make the synthesis quicker we will pass the // presigned URL to the system audio player. let input = AWSPollySynthesizeSpeechURLBuilderRequest() // Text to synthesize input.text = "Sample text" // We expect the output in MP3 format input.outputFormat = AWSPollyOutputFormat.mp3 // Choose the voice ID input.voiceId = AWSPollyVoiceId.joanna // Create an task to synthesize speech using the given synthesis input let builder = AWSPollySynthesizeSpeechURLBuilder.default().getPreSignedURL(input) // Request the URL for synthesis result builder.continueOnSuccessWith(block: { (awsTask: AWSTask<NSURL>) -> Any? in // The result of getPresignedURL task is NSURL. // Again, we ignore the errors in the example. let url = awsTask.result! // Try playing the data using the system AVAudioPlayer self.audioPlayer.replaceCurrentItem(with: AVPlayerItem(url: url as URL)) self.audioPlayer.play() return nil })