Get default audio devices (#50)

* Get default audio devices on Windows

* Get default audio devices on macOS

* Get default audio devices on Linux

Author: devopvoid

webrtc-jni/src/main/cpp/include/JNI_MediaDevices.h

@@ -37,8 +37,8 @@ namespace jni
 				AudioDeviceManager();
 				virtual ~AudioDeviceManager() {};
 
-				AudioDevicePtr getDefaultAudioCaptureDevice();
-				AudioDevicePtr getDefaultAudioPlaybackDevice();
+				virtual AudioDevicePtr getDefaultAudioCaptureDevice();
+				virtual AudioDevicePtr getDefaultAudioPlaybackDevice();
 
 				virtual std::set<AudioDevicePtr> getAudioCaptureDevices() = 0;
 				virtual std::set<AudioDevicePtr> getAudioPlaybackDevices() = 0;

webrtc-jni/src/main/cpp/include/media/audio/AudioDeviceManager.h

@@ -32,8 +32,8 @@ namespace jni
 				PulseAudioDeviceManager();
 				~PulseAudioDeviceManager();
 
-				AudioDevicePtr getDefaultAudioCaptureDevice();
-				AudioDevicePtr getDefaultAudioPlaybackDevice();
+				AudioDevicePtr getDefaultAudioCaptureDevice() override;
+				AudioDevicePtr getDefaultAudioPlaybackDevice() override;
 
 				std::set<AudioDevicePtr> getAudioCaptureDevices() override;
 				std::set<AudioDevicePtr> getAudioPlaybackDevices() override;
@@ -47,8 +47,10 @@ namespace jni
 				static void stateCallback(pa_context * ctx, void * userdata);
 				static void serverInfoCallback(pa_context * ctx, const pa_server_info * info, void * userdata);
 				static void subscribeCallback(pa_context * ctx, pa_subscription_event_type_t t, uint32_t idx, void * userdata);
+				static void getSourceInfoCallback(pa_context * ctx, const pa_source_info * info, int last, void * userdata);
 				static void getSourceCallback(pa_context * ctx, const pa_source_info * info, int last, void * userdata);
 				static void newSourceCallback(pa_context * ctx, const pa_source_info * info, int last, void * userdata);
+				static void getSinkInfoCallback(pa_context * ctx, const pa_sink_info * info, int last, void * userdata);
 				static void getSinkCallback(pa_context * ctx, const pa_sink_info * info, int last, void * userdata);
 				static void newSinkCallback(pa_context * ctx, const pa_sink_info * info, int last, void * userdata);
 
@@ -60,7 +62,9 @@ namespace jni
 				pa_context * context;
 
 				std::string defaultCaptureName;
+				std::string defaultCaptureDescName;
 				std::string defaultPlaybackName;
+				std::string defaultPlaybackDescName;
 
 				std::unordered_map<uint32_t, AudioDevicePtr> deviceMap;
 		};

webrtc-jni/src/main/cpp/include/media/audio/linux/AlsaAudioDeviceManager.h

@@ -34,11 +34,15 @@ namespace jni
 				std::set<AudioDevicePtr> getAudioCaptureDevices() override;
 				std::set<AudioDevicePtr> getAudioPlaybackDevices() override;
 
+				AudioDevicePtr getDefaultAudioCaptureDevice() override;
+				AudioDevicePtr getDefaultAudioPlaybackDevice() override;
+
 			private:
 				void enumerateDevices(const AudioObjectPropertyScope & scope);
 				void onDevicesChanged();
 				void onDefaultDeviceChanged(const AudioObjectPropertyScope & scope, DeviceList<AudioDevicePtr> & devices, const AudioDevicePtr & device);
 				void checkDeviceGone(DeviceList<AudioDevicePtr> & devices, AudioDeviceID * devIDs, const int numDevIDs, const AudioObjectPropertyScope & scope);
+				AudioDevicePtr createDefaultAudioDevice(const AudioObjectPropertyScope & scope);
 				AudioDevicePtr createAudioDevice(const AudioDeviceID & deviceID, const AudioObjectPropertyScope & scope);
 				bool insertAudioDevice(const AudioDevicePtr & device, const AudioObjectPropertyScope & scope);
 				int getChannelCount(const AudioDeviceID & deviceID, const AudioObjectPropertyScope & scope);

webrtc-jni/src/main/cpp/include/media/audio/linux/PulseAudioDeviceManager.h

@@ -36,10 +36,14 @@ namespace jni
 				std::set<AudioDevicePtr> getAudioCaptureDevices() override;
 				std::set<AudioDevicePtr> getAudioPlaybackDevices() override;
 
+				AudioDevicePtr getDefaultAudioCaptureDevice() override;
+				AudioDevicePtr getDefaultAudioPlaybackDevice() override;
+
 			private:
 				void enumerateDevices(EDataFlow dataFlow);
 				void addDevice(LPCWSTR deviceId);
 				void removeDevice(LPCWSTR deviceId);
+				AudioDevicePtr createDefaultAudioDevice(const EDataFlow & dataFlow);
 				AudioDevicePtr createAudioDevice(LPCWSTR deviceId, EDataFlow * dataFlow);
 				bool insertAudioDevice(AudioDevicePtr device, EDataFlow dataFlow);
 				void removeAudioDevice(DeviceList<AudioDevicePtr> & devices, std::string id);

webrtc-jni/src/main/cpp/include/media/audio/macos/CoreAudioDeviceManager.h

@@ -60,6 +60,40 @@ JNIEXPORT void JNICALL Java_dev_onvoid_webrtc_media_MediaDevices_removeDeviceCha
 	}
 }
 
+JNIEXPORT jobject JNICALL Java_dev_onvoid_webrtc_media_MediaDevices_getDefaultAudioRenderDevice
+(JNIEnv * env, jclass caller)
+{
+	jni::WebRTCContext * context = static_cast<jni::WebRTCContext *>(javaContext);
+
+	auto device = context->getAudioDeviceManager()->getDefaultAudioPlaybackDevice();
+
+	try {
+		return jni::AudioDevice::toJavaAudioDevice(env, device).release();
+	}
+	catch (...) {
+		ThrowCxxJavaException(env);
+	}
+
+	return nullptr;
+}
+
+JNIEXPORT jobject JNICALL Java_dev_onvoid_webrtc_media_MediaDevices_getDefaultAudioCaptureDevice
+(JNIEnv * env, jclass caller)
+{
+	jni::WebRTCContext * context = static_cast<jni::WebRTCContext *>(javaContext);
+
+	auto device = context->getAudioDeviceManager()->getDefaultAudioCaptureDevice();
+
+	try {
+		return jni::AudioDevice::toJavaAudioDevice(env, device).release();
+	}
+	catch (...) {
+		ThrowCxxJavaException(env);
+	}
+
+	return nullptr;
+}
+
 JNIEXPORT jobject JNICALL Java_dev_onvoid_webrtc_media_MediaDevices_getAudioRenderDevices
 (JNIEnv * env, jclass caller)
 {