Amazon Polly
开发人员指南
AWS 文档中描述的 AWS 服务或功能可能因区域而异。要查看适用于中国区域的差异,请参阅中国的 AWS 服务入门

iOS 示例

以下示例使用适用于 Amazon Polly 的 iOS 开发工具包,借助从语音列表中选择的语音来读取指定文本。

此处显示的代码涵盖主要任务,但不处理错误。有关完整代码,请参阅适用于 iOS 的 AWS 开发工具包的 Amazon Polly 演示

初始化

// 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()

获取可用语音的列表

// 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 })

合成语音

// 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 })