java.lang.Error: MMF: Create device enumerator failed CoInitialize has not been called

[nanguantong]

And then when use maven project, it's ok to run this jar, but error happened while running List<AudioDevice> captureDevices = MediaDevices.getAudioCaptureDevices();

the native code not called when WindowsAudioDeviceManager inited as following

ComInitializer::ComInitializer() : initialized(false)
    {
        HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);

        if (hr != RPC_E_CHANGED_MODE) {
            THROW_IF_FAILED(hr, "Initialize COM failed");

            initialized = true;
        }
    }

in WebRTCContext::initialize void WebRTCContext::initDeviceManagers() {

ifdef _WIN32

    audioDevManager = std::make_unique<avdev::WindowsAudioDeviceManager>();
    videoDevManager = std::make_unique<avdev::WindowsVideoDeviceManager>();

endif

  ......

}

in WindowsAudioDeviceManager

WindowsAudioDeviceManager::WindowsAudioDeviceManager() :
            deviceEnumerator()
        {
                       //////////////////////////////////////// not call ComInitializer /////////////////////////////////////////////
            HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&deviceEnumerator);
            THROW_IF_FAILED(hr, "MMF: Create device enumerator failed");

            enumerateDevices(eAll);

            deviceEnumerator->RegisterEndpointNotificationCallback(this);
        }

[nanguantong]

@devopvoid can you please help to fix this bug and then release the maven or gradle jar packet to public repo?

[devopvoid]

For gradle please see How to fetch the jni libs with gradle #23.

[nanguantong]

For gradle please see How to fetch the jni libs with gradle #23.

Yeah, got it.

[nanguantong]

@devopvoid can you please help to fix this bug and then release the maven or gradle jar packet to public repo?

But this is realy a bug to call CoCreateInstancebefore COM CoInitialize, so hope to fix that.

[devopvoid]

This is not a bug. I'm not sure where you found the ComInitializer.

1. WindowsAudio/VideoDeviceManager are based on Media Foundation.
2. WindowsAudioDeviceManager.h initializes MFInitializer.
3. MFInitializer calls MFStartup
4. Then WindowsAudioDeviceManager constructor is executed
5. Where CoCreateInstance works fine

[nanguantong]

This is not a bug. I'm not sure where you found the ComInitializer.

1. WindowsAudio/VideoDeviceManager are based on Media Foundation.
2. WindowsAudioDeviceManager.h initializes MFInitializer.
3. MFInitializer calls MFStartup
4. Then WindowsAudioDeviceManager constructor is executed
5. Where CoCreateInstance works fine

In webrtc-jni\src\main\cpp\src\platform\windows\ComInitializer.cpp call HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);

I just only call in my maven test project on windows as following:

1. pom.xml:

       <dependency>
           <groupId>dev.onvoid.webrtc</groupId>
           <artifactId>webrtc-java</artifactId>
           <version>0.4.0-SNAPSHOT</version>
       </dependency> 

2. 

[devopvoid]

Your error actually points to AudioProcessing, not MediaDevices.getAudioCaptureDevices().

Could you provide your test-class?

In the meantime you can try 0.5.0-SNAPSHOT.

[nanguantong]

[nanguantong]

Your error actually points to AudioProcessing, not MediaDevices.getAudioCaptureDevices().

Could you provide your test-class?

In the meantime you can try 0.5.0-SNAPSHOT.

0.5.0-SNAPSHOT used ok.

[nanguantong]

But 0.4.0 and (SNAPSHOT) still have this problem.

[devopvoid]

I won't fix it for 0.4.0-SNAPSHOT since 0.4.0 is released. The next snapshot version is 0.5.0-SNAPSHOT.

[nanguantong]

I won't fix it for 0.4.0-SNAPSHOT since 0.4.0 is released. The next snapshot version is 0.5.0-SNAPSHOT.

Yeh, no problem.