Audio Manager API Sample Reference
This Section demonstrates how to use the Audio Manager API for audio subsystem/stream operations.
1. Get the AudioFactory instance
#include "AudioFactory.hpp"
#include "AudioManager.hpp"
using namespace telux::common;
using namespace telux::audio;
static std::shared_ptr<IAudioManager> audioManager;
static std::shared_ptr<IAudioVoiceStream> audioVoiceStream;
Status status;
auto &audioFactory = audioFactory::getInstance();
2. Get the AudioManager object and check for audio subsystem Readiness
std::promise<ServiceStatus> prom{};
audioManager = audioFactory.getAudioManager([&prom](ServiceStatus serviceStatus) {
prom.set_value(serviceStatus);
});
if (!audioManager) {
std::cout << "Failed to get AudioManager object" << std::endl;
return;
}
ServiceStatus managerStatus = audioManager->getServiceStatus();
if (managerStatus != ServiceStatus::SERVICE_AVAILABLE) {
std::cout << "\nAudio subsystem is not ready, Please wait ..." << std::endl;
managerStatus = prom.get_future().get();
}
if (managerStatus == ServiceStatus::SERVICE_AVAILABLE) {
std::cout << "Audio Subsytem is Ready << std::endl;
} else {
std::cout << "ERROR - Unable to initialize audio subsystem" << std::endl;
return;
}
3. Query Supported Devices and Stream Types of Audio subsystem
Below methods provides details on supported Device Types and Stream Types
3.1 Query Supported Devices Types of Audio subsystem
void getDevicesCallback(std::vector<std::shared_ptr<IAudioDevice>> devices, ErrorCode error)
{
if (error != ErrorCode::SUCCESS) {
std::cout << "getDevices() returned with error " << static_cast<unsigned int>(error)
<< std::endl;
return;
}
int i = 0;
for (auto device_type : devices) {
std::cout << "Device [" << i << "] type: "
<< static_cast<unsigned int>(device_type->getType()) << ", direction: "
<< static_cast<unsigned int>(device_type->getDirection()) << std::endl;
i++;
}
}
status = audioManager->getDevices(getDevicesCallback);
3.2 Query Supported Stream Types of Audio subsystem
void getStreamTypesCallback(std::vector<StreamType> streams, ErrorCode error)
{
if (error != ErrorCode::SUCCESS) {
std::cout << "getStreamTypes() returned with error " << static_cast<unsigned int>(error)
<< std::endl;
return;
}
int i = 0;
for (auto stream_type : streams) {
std::cout << "Stream [" << i << "] type: " << static_cast<unsigned int>(stream_type)
<< std::endl;
i++;
}
}
status = audioManager->getStreamTypes(getStreamTypesCallback);
4. Create an Audio Stream (Voice Call Session)
void createStreamCallback(std::shared_ptr<IAudioStream> &stream, ErrorCode error)
{
if (error != ErrorCode::SUCCESS) {
std::cout << "createStream() returned with error " << static_cast<unsigned int>(error)
<< std::endl;
return;
}
std::cout << "createStream() succeeded." << std::endl;
audioVoiceStream = std::dynamic_pointer_cast<IAudioVoiceStream>(stream);
}
StreamConfig config;
config.type = StreamType::VOICE_CALL;
config.slotId = DEFAULT_SLOT_ID;
config.sampleRate = 16000;
config.format = AudioFormat::PCM_16BIT_SIGNED;
config.channelTypeMask = ChannelType::LEFT;
config.deviceTypes.emplace_back(DeviceType::DEVICE_TYPE_SPEAKER);
status = audioManager->createStream(config, createStreamCallback);
5. Delete an Audio Stream (Voice Call Session), which was created earlier
void deleteStreamCallback(ErrorCode error) {
if (error != ErrorCode::SUCCESS) {
std::cout << "deleteStream() returned with error " << static_cast<unsigned int>(error)
<< std::endl;
return;
}
std::cout << "deleteStream() succeeded." << std::endl;
audioVoiceStream.reset();
}
status = audioManager->deleteStream(std::dynamic_pointer_cast<IAudioStream>(audioVoiceStream),
deleteStreamCallback);