bool DeviceManager::getAudioDevices(bool input, std::vector<Device>& devs)
{
devs.clear();
#if defined(ANDROID)
// Under Android, we don't access the device file directly.
// Arbitrary use 0 for the mic and 1 for the output.
// These ids are used in MediaEngine::SetSoundDevices(in, out);
// The strings are for human consumption.
if (input) {
devs.push_back(Device("audioin", "audiorecord", 0));
} else {
devs.push_back(Device("audioout", "audiotrack", 1));
}
return true;
#elif defined(HAVE_RTAUDIO)
// Since we are using RtAudio for audio capture it's best to
// use RtAudio to enumerate devices to ensure indexes match.
RtAudio audio;
// Determine the number of devices available
auto ndevices = audio.getDeviceCount();
TraceS(this) << "Get audio devices: " << ndevices << endl;
// Scan through devices for various capabilities
RtAudio::DeviceInfo info;
for (unsigned i = 0; i <= ndevices; i++) {
try {
info = audio.getDeviceInfo(i); // may throw RtAudioError
TraceS(this) << "Device:"
<< "\n\tName: " << info.name
<< "\n\tOutput Channels: " << info.outputChannels
<< "\n\tInput Channels: " << info.inputChannels
<< "\n\tDuplex Channels: " << info.duplexChannels
<< "\n\tDefault Output: " << info.isDefaultOutput
<< "\n\tDefault Input: " << info.isDefaultInput
<< "\n\tProbed: " << info.probed
<< endl;
if (info.probed == true && (
(input && info.inputChannels > 0) ||
(!input && info.outputChannels > 0))) {
TraceS(this) << "Adding device: " << info.name << endl;
Device dev((input ? "audioin" : "audioout"), i, info.name, "",
(input ? info.isDefaultInput : info.isDefaultOutput));
devs.push_back(dev);
}
}
catch (RtAudioError& e) {
ErrorS(this) << "Cannot probe audio device: " << e.getMessage() << endl;
}
}
return filterDevices(devs, kFilteredAudioDevicesName);
#endif
}
bool MacDeviceManager::getCameras(std::vector<Device>& devices)
{
devices.clear();
if (!GetAVFoundationVideoDevices(&devices)) {
return false;
}
return filterDevices(devices, kFilteredVideoDevicesName);
}
bool LinuxDeviceManager::getVideoCaptureDevices(std::vector<Device>& devices)
{
devices.clear();
ScanV4L2Devices(devices);
return filterDevices(devices, kFilteredVideoDevicesName);
}