AWS SDK またはコマンドラインツールStartStreamTranscriptionAsyncで を使用する - AWS SDK コード例

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AWS SDK またはコマンドラインツールStartStreamTranscriptionAsyncで を使用する

次の例は、StartStreamTranscriptionAsync を使用する方法を説明しています。

C++
SDK for C++
注記

の詳細については、「」を参照してください GitHub。AWS コード例リポジトリ で全く同じ例を見つけて、設定と実行の方法を確認してください。

int main() { Aws::SDKOptions options; Aws::InitAPI(options); { //TODO(User): Set to the region of your AWS account. const Aws::String region = Aws::Region::US_WEST_2; //Load a profile that has been granted AmazonTranscribeFullAccess AWS managed permission policy. Aws::Client::ClientConfiguration config; #ifdef _WIN32 // ATTENTION: On Windows with the AWS C++ SDK, this example only runs if the SDK is built // with the curl library. // For more information, see the accompanying ReadMe. // For more information, see "Building the SDK for Windows with curl". // https://docs.aws.amazon.com/sdk-for-cpp/v1/developer-guide/setup-windows.html //TODO(User): Update to the location of your .crt file. config.caFile = "C:/curl/bin/curl-ca-bundle.crt"; #endif config.region = region; TranscribeStreamingServiceClient client(config); StartStreamTranscriptionHandler handler; handler.SetOnErrorCallback( [](const Aws::Client::AWSError<TranscribeStreamingServiceErrors> &error) { std::cerr << "ERROR: " + error.GetMessage() << std::endl; }); //SetTranscriptEventCallback called for every 'chunk' of file transcripted. // Partial results are returned in real time. handler.SetTranscriptEventCallback([](const TranscriptEvent &ev) { for (auto &&r: ev.GetTranscript().GetResults()) { if (r.GetIsPartial()) { std::cout << "[partial] "; } else { std::cout << "[Final] "; } for (auto &&alt: r.GetAlternatives()) { std::cout << alt.GetTranscript() << std::endl; } } }); StartStreamTranscriptionRequest request; request.SetMediaSampleRateHertz(SAMPLE_RATE); request.SetLanguageCode(LanguageCode::en_US); request.SetMediaEncoding( MediaEncoding::pcm); // wav and aiff files are PCM formats. request.SetEventStreamHandler(handler); auto OnStreamReady = [](AudioStream &stream) { Aws::FStream file(FILE_NAME, std::ios_base::in | std::ios_base::binary); if (!file.is_open()) { std::cerr << "Failed to open " << FILE_NAME << '\n'; } std::array<char, BUFFER_SIZE> buf; int i = 0; while (file) { file.read(&buf[0], buf.size()); if (!file) std::cout << "File: only " << file.gcount() << " could be read" << std::endl; Aws::Vector<unsigned char> bits{buf.begin(), buf.end()}; AudioEvent event(std::move(bits)); if (!stream) { std::cerr << "Failed to create a stream" << std::endl; break; } //The std::basic_istream::gcount() is used to count the characters in the given string. It returns //the number of characters extracted by the last read() operation. if (file.gcount() > 0) { if (!stream.WriteAudioEvent(event)) { std::cerr << "Failed to write an audio event" << std::endl; break; } } else { break; } std::this_thread::sleep_for(std::chrono::milliseconds( 25)); // Slow down because we are streaming from a file. } if (!stream.WriteAudioEvent( AudioEvent())) { // Per the spec, we have to send an empty event (an event without a payload) at the end. std::cerr << "Failed to send an empty frame" << std::endl; } else { std::cout << "Successfully sent the empty frame" << std::endl; } stream.flush(); stream.Close(); }; Aws::Utils::Threading::Semaphore signaling(0 /*initialCount*/, 1 /*maxCount*/); auto OnResponseCallback = [&signaling]( const TranscribeStreamingServiceClient * /*unused*/, const Model::StartStreamTranscriptionRequest & /*unused*/, const Model::StartStreamTranscriptionOutcome &outcome, const std::shared_ptr<const Aws::Client::AsyncCallerContext> & /*unused*/) { if (!outcome.IsSuccess()) { std::cerr << "Transcribe streaming error " << outcome.GetError().GetMessage() << std::endl; } signaling.Release(); }; std::cout << "Starting..." << std::endl; client.StartStreamTranscriptionAsync(request, OnStreamReady, OnResponseCallback, nullptr /*context*/); signaling.WaitOne(); // Prevent the application from exiting until we're done. std::cout << "Done" << std::endl; } Aws::ShutdownAPI(options); return 0; }
  • API の詳細については、「 API リファレンスStartStreamTranscriptionAsync」の「」を参照してください。 AWS SDK for C++