Code snippet showing C++ coroutines and Google Speech-to-Text

streaming_transcribe_coroutines.cc

using RecognizeStream = google::cloud::AsyncStreamingReadWriteRpc<
    google::cloud::speech::v1::StreamingRecognizeRequest,
    google::cloud::speech::v1::StreamingRecognizeResponse>;

// Print the responses as they are received.
google::cloud::future<void> ReadTranscript(RecognizeStream& stream) {
  while (true) {
    auto response = co_await stream.Read();
    // Terminate the loop if the stream is closed or has an error.
    if (!response) co_return;
    for (auto const& result : response->results()) {
      std::cout << "Result stability: " << result.stability() << "\n";
      for (auto const& alternative : result.alternatives()) {
        std::cout << alternative.confidence() << "\t"
                  << alternative.transcript() << "\n";
      }
    }
  }
}

Full code at:

https://github.com/GoogleCloudPlatform/cpp-samples/blob/main/speech/api/streaming_transcribe_coroutines.cc