Audio Manager API Sample Reference for audio tone generation.

Please follow the below steps to play a tone in an active tone generator stream.

### 1. Get the Audio Factory and Audio Manager instances ###

auto &audioFactory = AudioFactory::getInstance();
auto audioManager = audioFactory.getAudioManager();

### 2. Wait for the Audio subsystem to be initialized and ready ###

if (audioManager) {
    bool isReady = audioManager->isSubsystemReady();
    if (!isReady) {
        std::cout << "Audio subsystem is not ready, waiting for it to be ready " << std::endl;
        std::future<bool> f = audioManager->onSubsystemReady();
        isReady = f.get();
    }
} else {
    std::cout << "Invalid Audio manager" << std::endl;
}

### 3. Exit the application, if SDK is unable to initialize Audio subsystem ###

if(isReady) {
    std::cout << " *** Audio subsystem is Ready *** " << std::endl;
} else {
    std::cout << " *** ERROR - Unable to initialize Audio subsystem " << std::endl;
    return 1;
}

### 4. Create an audio Stream (to be associated with tone generator) ###

// Implement a response function to get the request status
void createStreamCallback(std::shared_ptr<IAudioStream> &stream, ErrorCode error) {
    if (error != ErrorCode::SUCCESS) {
        std::cout << "createStream() failed with error" << static_cast<int>(error) << std::endl;
        return;
    }
    std::cout << "createStream() succeeded." << std::endl;
    audioToneGeneratorStream = std::dynamic_pointer_cast<IAudioToneGeneratorStream>(stream);
}
// Create a tone generator stream with required configuration
config.type = telux::audio::StreamType::TONE_GENERATOR;
config.sampleRate = 48000;
config.format = AudioFormat::PCM_16BIT_SIGNED;
config.channelTypeMask = ChannelType::LEFT;
config.deviceTypes.emplace_back(DeviceType::DEVICE_TYPE_SPEAKER);
status = audioManager->createStream(config, createStreamCallback);

### 6. Play tone on a sink device ###

// Implement a response function to get the request status
void playToneCallback(ErrorCode error)
{
    if (error != ErrorCode::SUCCESS) {
        std::cout << "playTone() failed with error" << static_cast<int>(error) << std::endl;
        return;
    }
    std::cout << "playTone() succeeded." << std::endl;
}
// Play the tone with required configuration
status = audioToneGeneratorStream->playTone(freq, duration, gain, playToneCallback);

### 7. Optionally, you can stop the tone being played before the specified duration elapses ###

// Implement a response function to get the request status
void stopToneCallback(ErrorCode error)
{
    if (error != ErrorCode::SUCCESS) {
        std::cout << "stopTone() failed with error " << static_cast<int>(error) << std::endl;
        return;
    }
    std::cout << "stopTone() succeeded." << std::endl;
}
// Stop the tone play, which was started earlier
status = audioToneGeneratorStream->stopTone(stopToneCallback);

8. Delete the audio stream associated with the Tone Generator session

// Implement a response function to get the request status
void deleteStreamCallback(ErrorCode error) {
    if (error != ErrorCode::SUCCESS) {
        std::cout << "deleteStream() failed with error" << static_cast<int>(error) << std::endl;
        return;
    }
    std::cout << "deleteStream() succeeded." << std::endl;
    audioToneGeneratorStream.reset();
}
//Delete the Audio Stream
status = audioManager->deleteStream(
    std::dynamic_pointer_cast<IAudioStream>(audioToneGeneratorStream), deleteStreamCallback);