Expose capture state listener in AudioSystem am: 5120edaad2 (5a984880) · Commits · e / os / android_frameworks_av

media/libaudioclient/AudioSystem.cpp

+48 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,8 @@
		//#define LOG_NDEBUG 0

		#include <utils/Log.h>

		#include <android/media/BnCaptureStateListener.h>
		#include <binder/IServiceManager.h>
		#include <binder/ProcessState.h>
		#include <binder/IPCThreadState.h>
		@@ -44,6 +46,10 @@ std::set<audio_error_callback> AudioSystem::gAudioErrorCallbacks;
		dynamic_policy_callback AudioSystem::gDynPolicyCallback = NULL;
		record_config_callback AudioSystem::gRecordConfigCallback = NULL;

		// Required to be held while calling into gSoundTriggerCaptureStateListener.
		Mutex gSoundTriggerCaptureStateListenerLock;
		sp<AudioSystem::CaptureStateListener> gSoundTriggerCaptureStateListener = nullptr;

		// establish binder interface to AudioFlinger service
		const sp<IAudioFlinger> AudioSystem::get_audio_flinger()
		{
		@@ -1623,6 +1629,48 @@ status_t AudioSystem::getPreferredDeviceForStrategy(product_strategy_t strategy,
		return aps->getPreferredDeviceForStrategy(strategy, device);
		}

		class CaptureStateListenerImpl : public media::BnCaptureStateListener,
		public IBinder::DeathRecipient {
		public:
		binder::Status setCaptureState(bool active) override {
		Mutex::Autolock _l(gSoundTriggerCaptureStateListenerLock);
		gSoundTriggerCaptureStateListener->onStateChanged(active);
		return binder::Status::ok();
		}

		void binderDied(const wp<IBinder>&) override {
		Mutex::Autolock _l(gSoundTriggerCaptureStateListenerLock);
		gSoundTriggerCaptureStateListener->onServiceDied();
		gSoundTriggerCaptureStateListener = nullptr;
		}
		};

		status_t AudioSystem::registerSoundTriggerCaptureStateListener(
		const sp<CaptureStateListener>& listener) {
		const sp<IAudioPolicyService>& aps =
		AudioSystem::get_audio_policy_service();
		if (aps == 0) {
		return PERMISSION_DENIED;
		}

		sp<CaptureStateListenerImpl> wrapper = new CaptureStateListenerImpl();

		Mutex::Autolock _l(gSoundTriggerCaptureStateListenerLock);

		bool active;
		status_t status =
		aps->registerSoundTriggerCaptureStateListener(wrapper, &active);
		if (status != NO_ERROR) {
		listener->onServiceDied();
		return NO_ERROR;
		}
		gSoundTriggerCaptureStateListener = listener;
		listener->onStateChanged(active);
		sp<IBinder> binder = IInterface::asBinder(aps);
		binder->linkToDeath(wrapper);
		return NO_ERROR;
		}

		// ---------------------------------------------------------------------------

		int AudioSystem::AudioPolicyServiceClient::addAudioPortCallback(

media/libaudioclient/include/media/AudioSystem.h

+24 −0

Original line number	Diff line number	Diff line
		@@ -436,6 +436,30 @@ public:
		static status_t getDeviceForStrategy(product_strategy_t strategy,
		AudioDeviceTypeAddr &device);

		// A listener for capture state changes.
		class CaptureStateListener : public RefBase {
		public:
		// Called whenever capture state changes.
		virtual void onStateChanged(bool active) = 0;
		// Called whenever the service dies (and hence our listener is no longer
		// registered).
		virtual void onServiceDied() = 0;

		virtual ~CaptureStateListener() = default;
		};

		// Regiseters a listener for sound trigger capture state changes.
		// There may only be one such listener registered at any point.
		// The listener onStateChanged() method will be invoked sychronously from
		// this call with the initial value.
		// The listener onServiceDied() method will be invoked sychronously from
		// this call if initial attempt to register failed.
		// If the audio policy service cannot be reached, this method will return
		// PERMISSION_DENIED and will not invoke the callback, otherwise, it will
		// return NO_ERROR.
		static status_t registerSoundTriggerCaptureStateListener(
		const sp<CaptureStateListener>& listener);

		// ----------------------------------------------------------------------------

		class AudioVolumeGroupCallback : public RefBase