Camera: Add onCameraOpened/onCameraClosed callbacks
The onCameraOpened/onCameraClosed callbacks are used to notify camera
service client with [] permission that a certain camera device has been
opened/closed.
Test: Manually check callbacks are received in SystemUI app
Bug: 150540299
Change-Id: If6f3624c43927c30afef7df0a780eafe3ae4c527
Merged-In: If6f3624c43927c30afef7df0a780eafe3ae4c527
diff --git a/camera/aidl/android/hardware/ICameraServiceListener.aidl b/camera/aidl/android/hardware/ICameraServiceListener.aidl
index e9dcbdb..47580f8 100644
--- a/camera/aidl/android/hardware/ICameraServiceListener.aidl
+++ b/camera/aidl/android/hardware/ICameraServiceListener.aidl
@@ -83,4 +83,12 @@
* can retry after receiving this callback.
*/
oneway void onCameraAccessPrioritiesChanged();
+
+ /**
+ * Notify registered clients about cameras being opened/closed.
+ * Only clients with android.permission.CAMERA_OPEN_CLOSE_LISTENER permission
+ * will receive such callbacks.
+ */
+ oneway void onCameraOpened(String cameraId, String clientPackageId);
+ oneway void onCameraClosed(String cameraId);
}
diff --git a/camera/ndk/impl/ACameraManager.h b/camera/ndk/impl/ACameraManager.h
index 8c1da36..28fec82 100644
--- a/camera/ndk/impl/ACameraManager.h
+++ b/camera/ndk/impl/ACameraManager.h
@@ -92,6 +92,12 @@
}
virtual binder::Status onCameraAccessPrioritiesChanged();
+ virtual binder::Status onCameraOpened(const String16&, const String16&) {
+ return binder::Status::ok();
+ }
+ virtual binder::Status onCameraClosed(const String16&) {
+ return binder::Status::ok();
+ }
private:
const wp<CameraManagerGlobal> mCameraManager;
diff --git a/camera/tests/CameraBinderTests.cpp b/camera/tests/CameraBinderTests.cpp
index 8fe029a..dc5afc5 100644
--- a/camera/tests/CameraBinderTests.cpp
+++ b/camera/tests/CameraBinderTests.cpp
@@ -95,6 +95,17 @@
return binder::Status::ok();
}
+ virtual binder::Status onCameraOpened(const String16& /*cameraId*/,
+ const String16& /*clientPackageName*/) {
+ // No op
+ return binder::Status::ok();
+ }
+
+ virtual binder::Status onCameraClosed(const String16& /*cameraId*/) {
+ // No op
+ return binder::Status::ok();
+ }
+
bool waitForNumCameras(size_t num) const {
Mutex::Autolock l(mLock);
diff --git a/services/camera/libcameraservice/CameraService.cpp b/services/camera/libcameraservice/CameraService.cpp
index b20c9a4..670e026 100644
--- a/services/camera/libcameraservice/CameraService.cpp
+++ b/services/camera/libcameraservice/CameraService.cpp
@@ -118,6 +118,8 @@
// ----------------------------------------------------------------------------
static const String16 sManageCameraPermission("android.permission.MANAGE_CAMERA");
+static const String16 sCameraOpenCloseListenerPermission(
+ "android.permission.CAMERA_OPEN_CLOSE_LISTENER");
// Matches with PERCEPTIBLE_APP_ADJ in ProcessList.java
static constexpr int32_t kVendorClientScore = 200;
@@ -1811,7 +1813,11 @@
}
auto clientUid = CameraThreadState::getCallingUid();
- sp<ServiceListener> serviceListener = new ServiceListener(this, listener, clientUid);
+ auto clientPid = CameraThreadState::getCallingPid();
+ bool openCloseCallbackAllowed = checkPermission(sCameraOpenCloseListenerPermission,
+ clientPid, clientUid);
+ sp<ServiceListener> serviceListener = new ServiceListener(this, listener,
+ clientUid, clientPid, openCloseCallbackAllowed);
auto ret = serviceListener->initialize();
if (ret != NO_ERROR) {
String8 msg = String8::format("Failed to initialize service listener: %s (%d)",
@@ -2515,6 +2521,9 @@
sCameraService->mUidPolicy->registerMonitorUid(mClientUid);
+ // Notify listeners of camera open/close status
+ sCameraService->updateOpenCloseStatus(mCameraIdStr, true/*open*/, mClientPackageName);
+
return OK;
}
@@ -2555,6 +2564,9 @@
sCameraService->mUidPolicy->unregisterMonitorUid(mClientUid);
+ // Notify listeners of camera open/close status
+ sCameraService->updateOpenCloseStatus(mCameraIdStr, false/*open*/, mClientPackageName);
+
return OK;
}
@@ -3311,6 +3323,29 @@
});
}
+void CameraService::updateOpenCloseStatus(const String8& cameraId, bool open,
+ const String16& clientPackageName) {
+ Mutex::Autolock lock(mStatusListenerLock);
+
+ for (const auto& it : mListenerList) {
+ if (!it.second->isOpenCloseCallbackAllowed()) {
+ continue;
+ }
+
+ binder::Status ret;
+ String16 cameraId64(cameraId);
+ if (open) {
+ ret = it.second->getListener()->onCameraOpened(cameraId64, clientPackageName);
+ } else {
+ ret = it.second->getListener()->onCameraClosed(cameraId64);
+ }
+ if (!ret.isOk()) {
+ ALOGE("%s: Failed to trigger onCameraOpened/onCameraClosed callback: %d", __FUNCTION__,
+ ret.exceptionCode());
+ }
+ }
+}
+
template<class Func>
void CameraService::CameraState::updateStatus(StatusInternal status,
const String8& cameraId,
diff --git a/services/camera/libcameraservice/CameraService.h b/services/camera/libcameraservice/CameraService.h
index 22842a1..bcaca9f 100644
--- a/services/camera/libcameraservice/CameraService.h
+++ b/services/camera/libcameraservice/CameraService.h
@@ -817,7 +817,9 @@
class ServiceListener : public virtual IBinder::DeathRecipient {
public:
ServiceListener(sp<CameraService> parent, sp<hardware::ICameraServiceListener> listener,
- int uid) : mParent(parent), mListener(listener), mListenerUid(uid) {}
+ int uid, int pid, bool openCloseCallbackAllowed) : mParent(parent),
+ mListener(listener), mListenerUid(uid), mListenerPid(pid),
+ mOpenCloseCallbackAllowed(openCloseCallbackAllowed) {}
status_t initialize() {
return IInterface::asBinder(mListener)->linkToDeath(this);
@@ -831,12 +833,16 @@
}
int getListenerUid() { return mListenerUid; }
+ int getListenerPid() { return mListenerPid; }
sp<hardware::ICameraServiceListener> getListener() { return mListener; }
+ bool isOpenCloseCallbackAllowed() { return mOpenCloseCallbackAllowed; }
private:
wp<CameraService> mParent;
sp<hardware::ICameraServiceListener> mListener;
int mListenerUid;
+ int mListenerPid;
+ bool mOpenCloseCallbackAllowed = false;
};
// Guarded by mStatusListenerMutex
@@ -859,6 +865,13 @@
void updateStatus(StatusInternal status,
const String8& cameraId);
+ /**
+ * Update the opened/closed status of the given camera id.
+ *
+ * This method acqiures mStatusListenerLock.
+ */
+ void updateOpenCloseStatus(const String8& cameraId, bool open, const String16& packageName);
+
// flashlight control
sp<CameraFlashlight> mFlashlight;
// guard mTorchStatusMap
diff --git a/services/camera/libcameraservice/hidl/AidlCameraServiceListener.h b/services/camera/libcameraservice/hidl/AidlCameraServiceListener.h
index 0f6be79..b9e5857 100644
--- a/services/camera/libcameraservice/hidl/AidlCameraServiceListener.h
+++ b/services/camera/libcameraservice/hidl/AidlCameraServiceListener.h
@@ -54,6 +54,15 @@
// TODO: no implementation yet.
return binder::Status::ok();
}
+ virtual binder::Status onCameraOpened(const ::android::String16& /*cameraId*/,
+ const ::android::String16& /*clientPackageId*/) {
+ // empty implementation
+ return binder::Status::ok();
+ }
+ virtual binder::Status onCameraClosed(const ::android::String16& /*cameraId*/) {
+ // empty implementation
+ return binder::Status::ok();
+ }
};
} // implementation