Cloud Speech-to-Text API C++ Client Library

An idiomatic C++ client library for the Cloud Speech-to-Text API, a service which converts audio to text by applying powerful neural network models.

While this library is GA, please note Google Cloud C++ client libraries do not follow Semantic Versioning.

Quickstart

The following shows the code that you'll run in the google/cloud/speech/quickstart/ directory, which should give you a taste of the Cloud Speech-to-Text API C++ client library API.

#include "google/cloud/speech/v1/speech_client.h"
#include "google/cloud/project.h"
#include <iostream>

int main(int argc, char* argv[]) try {
  auto constexpr kDefaultUri = "gs://cloud-samples-data/speech/hello.wav";
  if (argc > 2) {
    std::cerr << "Usage: " << argv[0] << " [gcs-uri]\n"
              << "  The gcs-uri must be in gs://... format. It defaults to "
              << kDefaultUri << "\n";
    return 1;
  }
  auto uri = std::string{argc == 2 ? argv[1] : kDefaultUri};

  namespace speech = ::google::cloud::speech_v1;
  auto client = speech::SpeechClient(speech::MakeSpeechConnection());

  google::cloud::speech::v1::RecognitionConfig config;
  config.set_language_code("en-US");
  google::cloud::speech::v1::RecognitionAudio audio;
  audio.set_uri(uri);
  auto response = client.Recognize(config, audio);
  if (!response) throw std::move(response).status();
  std::cout << response->DebugString() << "\n";

  return 0;
} catch (google::cloud::Status const& status) {
  std::cerr << "google::cloud::Status thrown: " << status << "\n";
  return 1;
}

Main classes

This library offers multiple *Client classes, which are listed below. Each one of these classes exposes all the RPCs for a gRPC service as member functions of the class. This library groups multiple gRPC services because they are part of the same product or are often used together. A typical example may be the administrative and data plane operations for a single product.

The library also has other classes that provide helpers, configuration parameters, and infrastructure to mock the *Client classes when testing your application.

More Information