Amazon Polly 양방향 스트리밍 출시: 대화형 AI를 위한 실시간 음성 합성

PollyAsyncClient pollyClient = PollyAsyncClient.builder()
    .region(Region.US_WEST_2)
    .credentialsProvider(DefaultCredentialsProvider.create())
    .build();

StartSpeechSynthesisStreamRequest request = StartSpeechSynthesisStreamRequest.builder()
    .voiceId(VoiceId.JOANNA)
    .engine(Engine.GENERATIVE)
    .outputFormat(OutputFormat.MP3)
    .sampleRate("24000")
    .build();

StartSpeechSynthesisStreamResponseHandler responseHandler = StartSpeechSynthesisStreamResponseHandler.builder()
    .subscriber(StartSpeechSynthesisStreamResponseHandler.Visitor.builder()
        .onAudioEvent(audioEvent -> {
            byte[] audioData = audioEvent.audioChunk().asByteArray();
            playOrBufferAudio(audioData);
        })
        .onStreamClosedEvent(event -> {
            System.out.println("Synthesis complete. Characters processed: " + event.requestCharacters());
        })
        .build())
    .build();

llmClient.streamCompletion(prompt, token -> {
    boolean isSentenceEnd = token.endsWith(".") || token.endsWith("!") || token.endsWith("?");
    pollyStreamer.sendText(token, isSentenceEnd);
});