How can I use hided blackhole device?

[dttlgotv]

I just used the newest blackhole release to test. The device 2 is hided, but I want to used the device 2 input. It is not luck that it can not be found in the code below.

GetNumberDevices(AudioDeviceID scopedDeviceIds[], const uint32_t deviceListLength)
{
UInt32 size = 0;
OSStatus err = noErr;
AudioObjectPropertyAddress propertyAddress = {kAudioHardwarePropertyDevices, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
err = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &size);
if (noErr != err){
return 0;
}

if (size == 0)
{
    return 0;
}

AudioDeviceID* deviceIds = (AudioDeviceID*)malloc(size);
UInt32 numberDevices = size / sizeof(AudioDeviceID);
AudioBufferList* bufferList = NULL;
UInt32 numberScopedDevices = 0;


// Then list the rest of the devices
bool listOK = true;
err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &size, deviceIds);
if (err != noErr){

    listOK = false;
}
else
{
    propertyAddress.mSelector = kAudioDevicePropertyStreamConfiguration;
    propertyAddress.mScope = kAudioDevicePropertyScopeInput;
    propertyAddress.mElement = 0;
    for (UInt32 i = 0; i < numberDevices; i++)
    {
        // Check for input channels
        err = AudioObjectGetPropertyDataSize(deviceIds[i], &propertyAddress, 0, NULL, &size);
        if (err == kAudioHardwareBadDeviceError)
        {
           // This device doesn't actually exist; continue iterating.
           qInfo() << "audio:err kAudioHardwareBadDeviceError";
           continue;
        }
        else if (err != noErr)
        {
           qInfo() << "audio:err GetNumberDevices failed, err is" << err;
           listOK = false;
           break;
        }

        bufferList = (AudioBufferList*)malloc(size);
        err = AudioObjectGetPropertyData(deviceIds[i], &propertyAddress, 0, NULL, &size, bufferList);
        if (err != noErr)
        {
           qInfo() << "audio:err GetNumberDevices AudioObjectGetPropertyData failed, err is" << err;
           listOK = false;
           break;
        }

        if (bufferList->mNumberBuffers > 0)
        {
           if (numberScopedDevices >= deviceListLength)
           {
                qWarning("audio:cap Device list is not long enough");
                listOK = false;
                break;
           }

           scopedDeviceIds[numberScopedDevices] = deviceIds[i];
           numberScopedDevices++;
        }

        free(bufferList);
        bufferList = NULL;
    }  // for
}

if (!listOK){
    if (deviceIds){
        free(deviceIds);
        deviceIds = NULL;
    }

    if (bufferList)	{
        free(bufferList);
        bufferList = NULL;
    }

    return 0;
}

// Happy ending
if (deviceIds){
    free(deviceIds);
    deviceIds = NULL;
}

return numberScopedDevices;

}

After calling the funcion, the hided input device 2 is not be got.
Please help me to know How I can use the hided input device. Thanks a lot.

[devinroth]

Being hidden means is will not show up in that list. You need to get the AudioObjectID via https://developer.apple.com/documentation/coreaudio/kaudiohardwarepropertytranslateuidtodevice Devin

…

On Nov 19, 2023 at 9:11 PM -1000, dttlgotv ***@***.***>, wrote: I just used the newest blackhole release to test. The device 2 is hided, but I want to used the device 2 input. It is not luck that it can not be found in the code below. GetNumberDevices(AudioDeviceID scopedDeviceIds[], const uint32_t deviceListLength) { UInt32 size = 0; OSStatus err = noErr; AudioObjectPropertyAddress propertyAddress = {kAudioHardwarePropertyDevices, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster }; err = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &size); if (noErr != err){ return 0; } if (size == 0) { return 0; } AudioDeviceID* deviceIds = (AudioDeviceID*)malloc(size); UInt32 numberDevices = size / sizeof(AudioDeviceID); AudioBufferList* bufferList = NULL; UInt32 numberScopedDevices = 0; // Then list the rest of the devices bool listOK = true; err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &propertyAddress, 0, NULL, &size, deviceIds); if (err != noErr){ listOK = false; } else { propertyAddress.mSelector = kAudioDevicePropertyStreamConfiguration; propertyAddress.mScope = kAudioDevicePropertyScopeInput; propertyAddress.mElement = 0; for (UInt32 i = 0; i < numberDevices; i++) { // Check for input channels err = AudioObjectGetPropertyDataSize(deviceIds[i], &propertyAddress, 0, NULL, &size); if (err == kAudioHardwareBadDeviceError) { // This device doesn't actually exist; continue iterating. qInfo() << "audio:err kAudioHardwareBadDeviceError"; continue; } else if (err != noErr) { qInfo() << "audio:err GetNumberDevices failed, err is" << err; listOK = false; break; } bufferList = (AudioBufferList*)malloc(size); err = AudioObjectGetPropertyData(deviceIds[i], &propertyAddress, 0, NULL, &size, bufferList); if (err != noErr) { qInfo() << "audio:err GetNumberDevices AudioObjectGetPropertyData failed, err is" << err; listOK = false; break; } if (bufferList->mNumberBuffers > 0) { if (numberScopedDevices >= deviceListLength) { qWarning("audio:cap Device list is not long enough"); listOK = false; break; } scopedDeviceIds[numberScopedDevices] = deviceIds[i]; numberScopedDevices++; } free(bufferList); bufferList = NULL; } // for } if (!listOK){ if (deviceIds){ free(deviceIds); deviceIds = NULL; } if (bufferList) { free(bufferList); bufferList = NULL; } return 0; } // Happy ending if (deviceIds){ free(deviceIds); deviceIds = NULL; } return numberScopedDevices; } After calling the funcion, the hided input device 2 is not be got. Please help me to know How I can use the hided input device. Thanks a lot. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[dttlgotv]

Thanks a lot.