Simulate a microphone thread sending audio to the Cloud Speech API.
| 51 | |
| 52 | // Simulate a microphone thread sending audio to the Cloud Speech API. |
| 53 | g::future<void> WriteAudio(RecognizeStream& stream, |
| 54 | speech::v1::StreamingRecognizeRequest request, |
| 55 | std::string const& path, g::CompletionQueue cq) { |
| 56 | // Open the input file and read from it until there is no more data. |
| 57 | auto file = std::ifstream(path, std::ios::binary); |
| 58 | while (file) { |
| 59 | // Simulate a delay to acquire the audio. |
| 60 | co_await cq.MakeRelativeTimer(std::chrono::seconds(1)); |
| 61 | auto constexpr kChunkSize = 64 * 1024; |
| 62 | std::vector<char> chunk(kChunkSize); |
| 63 | file.read(chunk.data(), chunk.size()); |
| 64 | auto const bytes_read = file.gcount(); |
| 65 | // If there is any data left on the file, send it to the service |
| 66 | if (bytes_read > 0) { |
| 67 | request.clear_streaming_config(); |
| 68 | request.set_audio_content(chunk.data(), bytes_read); |
| 69 | std::cout << "Sending " << bytes_read / 1024 << "k bytes." << std::endl; |
| 70 | // Terminate the loop if there is an error in the stream. |
| 71 | if (!co_await stream.Write(request, grpc::WriteOptions())) co_return; |
| 72 | } |
| 73 | } |
| 74 | co_await stream.WritesDone(); |
| 75 | } |
| 76 | |
| 77 | g::future<g::Status> StreamingTranscribe(g::CompletionQueue cq, |
| 78 | ParseResult args) { |
no outgoing calls
no test coverage detected