diff --git a/services/camera/libcameraservice/Camera2Device.cpp b/services/camera/libcameraservice/Camera2Device.cpp
index 77df152..710d0e9 100644
--- a/services/camera/libcameraservice/Camera2Device.cpp
+++ b/services/camera/libcameraservice/Camera2Device.cpp
@@ -445,6 +445,10 @@
     return res;
 }
 
+bool Camera2Device::willNotify3A() {
+    return true;
+}
+
 void Camera2Device::notificationCallback(int32_t msg_type,
         int32_t ext1,
         int32_t ext2,
diff --git a/services/camera/libcameraservice/Camera2Device.h b/services/camera/libcameraservice/Camera2Device.h
index 3034a1d..372ce9f 100644
--- a/services/camera/libcameraservice/Camera2Device.h
+++ b/services/camera/libcameraservice/Camera2Device.h
@@ -59,6 +59,7 @@
     virtual status_t createDefaultRequest(int templateId, CameraMetadata *request);
     virtual status_t waitUntilDrained();
     virtual status_t setNotifyCallback(NotificationListener *listener);
+    virtual bool     willNotify3A();
     virtual status_t waitForNextFrame(nsecs_t timeout);
     virtual status_t getNextFrame(CameraMetadata *frame);
     virtual status_t triggerAutofocus(uint32_t id);
diff --git a/services/camera/libcameraservice/Camera3Device.cpp b/services/camera/libcameraservice/Camera3Device.cpp
index 73bf30c..9d0f392 100644
--- a/services/camera/libcameraservice/Camera3Device.cpp
+++ b/services/camera/libcameraservice/Camera3Device.cpp
@@ -844,6 +844,10 @@
     return OK;
 }
 
+bool Camera3Device::willNotify3A() {
+    return false;
+}
+
 status_t Camera3Device::waitForNextFrame(nsecs_t timeout) {
     ATRACE_CALL();
     status_t res;
@@ -1244,13 +1248,6 @@
 
     }
 
-    AlgState cur3aState;
-    AlgState new3aState;
-    int32_t aeTriggerId = 0;
-    int32_t afTriggerId = 0;
-
-    NotificationListener *listener = NULL;
-
     // Process the result metadata, if provided
     if (result->result != NULL) {
         Mutex::Autolock l(mOutputLock);
@@ -1288,59 +1285,6 @@
                     " metadata for frame %d (%lld vs %lld respectively)",
                     frameNumber, timestamp, entry.data.i64[0]);
         }
-
-        // Get 3A states from result metadata
-
-        entry = captureResult.find(ANDROID_CONTROL_AE_STATE);
-        if (entry.count == 0) {
-            CLOGE("No AE state provided by HAL for frame %d!",
-                    frameNumber);
-        } else {
-            new3aState.aeState =
-                    static_cast<camera_metadata_enum_android_control_ae_state>(
-                        entry.data.u8[0]);
-        }
-
-        entry = captureResult.find(ANDROID_CONTROL_AF_STATE);
-        if (entry.count == 0) {
-            CLOGE("No AF state provided by HAL for frame %d!",
-                    frameNumber);
-        } else {
-            new3aState.afState =
-                    static_cast<camera_metadata_enum_android_control_af_state>(
-                        entry.data.u8[0]);
-        }
-
-        entry = captureResult.find(ANDROID_CONTROL_AWB_STATE);
-        if (entry.count == 0) {
-            CLOGE("No AWB state provided by HAL for frame %d!",
-                    frameNumber);
-        } else {
-            new3aState.awbState =
-                    static_cast<camera_metadata_enum_android_control_awb_state>(
-                        entry.data.u8[0]);
-        }
-
-        entry = captureResult.find(ANDROID_CONTROL_AF_TRIGGER_ID);
-        if (entry.count == 0) {
-            CLOGE("No AF trigger ID provided by HAL for frame %d!",
-                    frameNumber);
-        } else {
-            afTriggerId = entry.data.i32[0];
-        }
-
-        entry = captureResult.find(ANDROID_CONTROL_AE_PRECAPTURE_ID);
-        if (entry.count == 0) {
-            CLOGE("No AE precapture trigger ID provided by HAL"
-                    " for frame %d!", frameNumber);
-        } else {
-            aeTriggerId = entry.data.i32[0];
-        }
-
-        listener = mListener;
-        cur3aState = m3AState;
-
-        m3AState = new3aState;
     } // scope for mOutputLock
 
     // Return completed buffers to their streams with the timestamp
@@ -1357,30 +1301,16 @@
         }
     }
 
-    // Finally, dispatch any 3A change events to listeners if we got metadata
+    // Finally, signal any waiters for new frames
 
     if (result->result != NULL) {
         mResultSignal.signal();
     }
 
-    if (result->result != NULL && listener != NULL) {
-        if (new3aState.aeState != cur3aState.aeState) {
-            ALOGVV("%s: AE state changed from 0x%x to 0x%x",
-                    __FUNCTION__, cur3aState.aeState, new3aState.aeState);
-            listener->notifyAutoExposure(new3aState.aeState, aeTriggerId);
-        }
-        if (new3aState.afState != cur3aState.afState) {
-            ALOGVV("%s: AF state changed from 0x%x to 0x%x",
-                    __FUNCTION__, cur3aState.afState, new3aState.afState);
-            listener->notifyAutoFocus(new3aState.afState, afTriggerId);
-        }
-        if (new3aState.awbState != cur3aState.awbState) {
-            listener->notifyAutoWhitebalance(new3aState.awbState, aeTriggerId);
-        }
-    }
-
 }
 
+
+
 void Camera3Device::notify(const camera3_notify_msg *msg) {
     ATRACE_CALL();
     NotificationListener *listener;
diff --git a/services/camera/libcameraservice/Camera3Device.h b/services/camera/libcameraservice/Camera3Device.h
index faa42b9..2328f89 100644
--- a/services/camera/libcameraservice/Camera3Device.h
+++ b/services/camera/libcameraservice/Camera3Device.h
@@ -107,6 +107,7 @@
     virtual status_t waitUntilDrained();
 
     virtual status_t setNotifyCallback(NotificationListener *listener);
+    virtual bool     willNotify3A();
     virtual status_t waitForNextFrame(nsecs_t timeout);
     virtual status_t getNextFrame(CameraMetadata *frame);
 
@@ -389,18 +390,6 @@
     Condition              mResultSignal;
     NotificationListener  *mListener;
 
-    struct AlgState {
-        camera_metadata_enum_android_control_ae_state  aeState;
-        camera_metadata_enum_android_control_af_state  afState;
-        camera_metadata_enum_android_control_awb_state awbState;
-
-        AlgState() :
-                aeState(ANDROID_CONTROL_AE_STATE_INACTIVE),
-                afState(ANDROID_CONTROL_AF_STATE_INACTIVE),
-                awbState(ANDROID_CONTROL_AWB_STATE_INACTIVE) {
-        }
-    } m3AState;
-
     /**** End scope for mOutputLock ****/
 
     /**
diff --git a/services/camera/libcameraservice/CameraDeviceBase.h b/services/camera/libcameraservice/CameraDeviceBase.h
index 8c457d9..aa92bec 100644
--- a/services/camera/libcameraservice/CameraDeviceBase.h
+++ b/services/camera/libcameraservice/CameraDeviceBase.h
@@ -156,6 +156,13 @@
     virtual status_t setNotifyCallback(NotificationListener *listener) = 0;
 
     /**
+     * Whether the device supports calling notifyAutofocus, notifyAutoExposure,
+     * and notifyAutoWhitebalance; if this returns false, the client must
+     * synthesize these notifications from received frame metadata.
+     */
+    virtual bool     willNotify3A() = 0;
+
+    /**
      * Wait for a new frame to be produced, with timeout in nanoseconds.
      * Returns TIMED_OUT when no frame produced within the specified duration
      */
diff --git a/services/camera/libcameraservice/camera2/FrameProcessor.cpp b/services/camera/libcameraservice/camera2/FrameProcessor.cpp
index d13d398..114a7a8 100644
--- a/services/camera/libcameraservice/camera2/FrameProcessor.cpp
+++ b/services/camera/libcameraservice/camera2/FrameProcessor.cpp
@@ -33,6 +33,9 @@
     ProFrameProcessor(device),
     mClient(client),
     mLastFrameNumberOfFaces(0) {
+
+    sp<CameraDeviceBase> d = device.promote();
+    mSynthesize3ANotify = !(d->willNotify3A());
 }
 
 FrameProcessor::~FrameProcessor() {
@@ -50,6 +53,11 @@
         return false;
     }
 
+    if (mSynthesize3ANotify) {
+        // Ignoring missing fields for now
+        process3aState(frame, client);
+    }
+
     if (!ProFrameProcessor::processSingleFrame(frame, device)) {
         return false;
     }
@@ -185,6 +193,99 @@
     return OK;
 }
 
+status_t FrameProcessor::process3aState(const CameraMetadata &frame,
+        const sp<Camera2Client> &client) {
+
+    ATRACE_CALL();
+    camera_metadata_ro_entry_t entry;
+    int mId = client->getCameraId();
+
+    entry = frame.find(ANDROID_REQUEST_FRAME_COUNT);
+    int32_t frameNumber = entry.data.i32[0];
+
+    // Get 3A states from result metadata
+    bool gotAllStates = true;
+
+    AlgState new3aState;
+
+    entry = frame.find(ANDROID_CONTROL_AE_STATE);
+    if (entry.count == 0) {
+        ALOGE("%s: Camera %d: No AE state provided by HAL for frame %d!",
+                __FUNCTION__, mId, frameNumber);
+        gotAllStates = false;
+    } else {
+        new3aState.aeState =
+                static_cast<camera_metadata_enum_android_control_ae_state>(
+                    entry.data.u8[0]);
+    }
+
+    entry = frame.find(ANDROID_CONTROL_AF_STATE);
+    if (entry.count == 0) {
+        ALOGE("%s: Camera %d: No AF state provided by HAL for frame %d!",
+                __FUNCTION__, mId, frameNumber);
+        gotAllStates = false;
+    } else {
+        new3aState.afState =
+                static_cast<camera_metadata_enum_android_control_af_state>(
+                    entry.data.u8[0]);
+    }
+
+    entry = frame.find(ANDROID_CONTROL_AWB_STATE);
+    if (entry.count == 0) {
+        ALOGE("%s: Camera %d: No AWB state provided by HAL for frame %d!",
+                __FUNCTION__, mId, frameNumber);
+        gotAllStates = false;
+    } else {
+        new3aState.awbState =
+                static_cast<camera_metadata_enum_android_control_awb_state>(
+                    entry.data.u8[0]);
+    }
+
+    int32_t afTriggerId = 0;
+    entry = frame.find(ANDROID_CONTROL_AF_TRIGGER_ID);
+    if (entry.count == 0) {
+        ALOGE("%s: Camera %d: No AF trigger ID provided by HAL for frame %d!",
+                __FUNCTION__, mId, frameNumber);
+        gotAllStates = false;
+    } else {
+        afTriggerId = entry.data.i32[0];
+    }
+
+    int32_t aeTriggerId = 0;
+    entry = frame.find(ANDROID_CONTROL_AE_PRECAPTURE_ID);
+    if (entry.count == 0) {
+        ALOGE("%s: Camera %d: No AE precapture trigger ID provided by HAL"
+                " for frame %d!",
+                __FUNCTION__, mId, frameNumber);
+        gotAllStates = false;
+    } else {
+        aeTriggerId = entry.data.i32[0];
+    }
+
+    if (!gotAllStates) return BAD_VALUE;
+
+    if (new3aState.aeState != m3aState.aeState) {
+        ALOGV("%s: AE state changed from 0x%x to 0x%x",
+                __FUNCTION__, m3aState.aeState, new3aState.aeState);
+        client->notifyAutoExposure(new3aState.aeState, aeTriggerId);
+    }
+    if (new3aState.afState != m3aState.afState) {
+        ALOGV("%s: AF state changed from 0x%x to 0x%x",
+                __FUNCTION__, m3aState.afState, new3aState.afState);
+        client->notifyAutoFocus(new3aState.afState, afTriggerId);
+    }
+    if (new3aState.awbState != m3aState.awbState) {
+        ALOGV("%s: AWB state changed from 0x%x to 0x%x",
+                __FUNCTION__, m3aState.awbState, new3aState.awbState);
+        client->notifyAutoWhitebalance(new3aState.awbState, aeTriggerId);
+    }
+
+    m3aState = new3aState;
+
+    return OK;
+}
+
+
 void FrameProcessor::callbackFaceDetection(sp<Camera2Client> client,
                                      const camera_frame_metadata &metadata) {
 
diff --git a/services/camera/libcameraservice/camera2/FrameProcessor.h b/services/camera/libcameraservice/camera2/FrameProcessor.h
index 27ed8f6..f480c55 100644
--- a/services/camera/libcameraservice/camera2/FrameProcessor.h
+++ b/services/camera/libcameraservice/camera2/FrameProcessor.h
@@ -44,6 +44,9 @@
 
   private:
     wp<Camera2Client> mClient;
+
+    bool mSynthesize3ANotify;
+
     int mLastFrameNumberOfFaces;
 
     void processNewFrames(const sp<Camera2Client> &client);
@@ -54,6 +57,22 @@
     status_t processFaceDetect(const CameraMetadata &frame,
             const sp<Camera2Client> &client);
 
+    // Send 3A state change notifications to client based on frame metadata
+    status_t process3aState(const CameraMetadata &frame,
+            const sp<Camera2Client> &client);
+
+    struct AlgState {
+        camera_metadata_enum_android_control_ae_state  aeState;
+        camera_metadata_enum_android_control_af_state  afState;
+        camera_metadata_enum_android_control_awb_state awbState;
+
+        AlgState() :
+                aeState(ANDROID_CONTROL_AE_STATE_INACTIVE),
+                afState(ANDROID_CONTROL_AF_STATE_INACTIVE),
+                awbState(ANDROID_CONTROL_AWB_STATE_INACTIVE) {
+        }
+    } m3aState;
+
     // Emit FaceDetection event to java if faces changed
     void callbackFaceDetection(sp<Camera2Client> client,
                                const camera_frame_metadata &metadata);