Camera: Remove dead legacy code

"mHal3Device" is no longer used, the associated code is currently
dead.
Legacy code inside "CameraHardwareInterface" is also
no longer used.

Bug: 35215313
Test: Camera CTS
Change-Id: I6ee33fc289e3b42af543d9027c7d76efc8d73b0b
diff --git a/services/camera/libcameraservice/device1/CameraHardwareInterface.cpp b/services/camera/libcameraservice/device1/CameraHardwareInterface.cpp
index 469c86c..0992aa1 100644
--- a/services/camera/libcameraservice/device1/CameraHardwareInterface.cpp
+++ b/services/camera/libcameraservice/device1/CameraHardwareInterface.cpp
@@ -29,11 +29,6 @@
 CameraHardwareInterface::~CameraHardwareInterface()
 {
     ALOGI("Destroying camera %s", mName.string());
-    if (mDevice) {
-        int rc = mDevice->common.close(&mDevice->common);
-        if (rc != OK)
-            ALOGE("Could not close camera %s: %d", mName.string(), rc);
-    }
     if (mHidlDevice != nullptr) {
         mHidlDevice->close();
         mHidlDevice.clear();
@@ -42,12 +37,6 @@
 }
 
 status_t CameraHardwareInterface::initialize(sp<CameraProviderManager> manager) {
-    if (mDevice) {
-        ALOGE("%s: camera hardware interface has been initialized to libhardware path!",
-                __FUNCTION__);
-        return INVALID_OPERATION;
-    }
-
     ALOGI("Opening camera %s", mName.string());
 
     status_t ret = manager->openSession(mName.string(), this, &mHidlDevice);
@@ -444,23 +433,6 @@
         }
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->setPreviewWindow(buf.get() ? this : nullptr));
-    } else if (mDevice) {
-        if (mDevice->ops->set_preview_window) {
-            mPreviewWindow = buf;
-            if (buf != nullptr) {
-                if (mPreviewScalingMode != NOT_SET) {
-                    setPreviewScalingMode(mPreviewScalingMode);
-                }
-                if (mPreviewTransform != NOT_SET) {
-                    setPreviewTransform(mPreviewTransform);
-                }
-            }
-            mHalPreviewWindow.user = this;
-            ALOGV("%s &mHalPreviewWindow %p mHalPreviewWindow.user %p",__FUNCTION__,
-                    &mHalPreviewWindow, mHalPreviewWindow.user);
-            return mDevice->ops->set_preview_window(mDevice,
-                    buf.get() ? &mHalPreviewWindow.nw : 0);
-        }
     }
     return INVALID_OPERATION;
 }
@@ -478,15 +450,6 @@
     mCbUser = user;
 
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
-
-    if (mDevice && mDevice->ops->set_callbacks) {
-        mDevice->ops->set_callbacks(mDevice,
-                               sNotifyCb,
-                               sDataCb,
-                               sDataCbTimestamp,
-                               sGetMemory,
-                               this);
-    }
 }
 
 void CameraHardwareInterface::enableMsgType(int32_t msgType)
@@ -494,8 +457,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         mHidlDevice->enableMsgType(msgType);
-    } else if (mDevice && mDevice->ops->enable_msg_type) {
-        mDevice->ops->enable_msg_type(mDevice, msgType);
     }
 }
 
@@ -504,8 +465,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         mHidlDevice->disableMsgType(msgType);
-    } else if (mDevice && mDevice->ops->disable_msg_type) {
-        mDevice->ops->disable_msg_type(mDevice, msgType);
     }
 }
 
@@ -514,8 +473,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return mHidlDevice->msgTypeEnabled(msgType);
-    } else if (mDevice && mDevice->ops->msg_type_enabled) {
-        return mDevice->ops->msg_type_enabled(mDevice, msgType);
     }
     return false;
 }
@@ -526,8 +483,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->startPreview());
-    } else if (mDevice && mDevice->ops->start_preview) {
-        return mDevice->ops->start_preview(mDevice);
     }
     return INVALID_OPERATION;
 }
@@ -537,8 +492,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         mHidlDevice->stopPreview();
-    } else if (mDevice && mDevice->ops->stop_preview) {
-        mDevice->ops->stop_preview(mDevice);
     }
 }
 
@@ -547,8 +500,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return mHidlDevice->previewEnabled();
-    } else if (mDevice && mDevice->ops->preview_enabled) {
-        return mDevice->ops->preview_enabled(mDevice);
     }
     return false;
 }
@@ -559,8 +510,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->storeMetaDataInBuffers(enable));
-    } else if (mDevice && mDevice->ops->store_meta_data_in_buffers) {
-        return mDevice->ops->store_meta_data_in_buffers(mDevice, enable);
     }
     return enable ? INVALID_OPERATION: OK;
 }
@@ -571,8 +520,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->startRecording());
-    } else if (mDevice && mDevice->ops->start_recording) {
-        return mDevice->ops->start_recording(mDevice);
     }
     return INVALID_OPERATION;
 }
@@ -585,8 +532,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         mHidlDevice->stopRecording();
-    } else if (mDevice && mDevice->ops->stop_recording) {
-        mDevice->ops->stop_recording(mDevice);
     }
 }
 
@@ -598,8 +543,6 @@
     ALOGV("%s(%s)", __FUNCTION__, mName.string());
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return mHidlDevice->recordingEnabled();
-    } else if (mDevice && mDevice->ops->recording_enabled) {
-        return mDevice->ops->recording_enabled(mDevice);
     }
     return false;
 }
@@ -624,9 +567,6 @@
         } else {
             mHidlDevice->releaseRecordingFrame(heapId, bufferIndex);
         }
-    } else if (mDevice && mDevice->ops->release_recording_frame) {
-        void *data = ((uint8_t *)heap->base()) + offset;
-        return mDevice->ops->release_recording_frame(mDevice, data);
     }
 }
 
@@ -653,9 +593,6 @@
                 ALOGE("%s only supports VideoNativeHandleMetadata mode", __FUNCTION__);
                 return;
             }
-        } else {
-            ALOGE("Non HIDL mode do not support %s", __FUNCTION__);
-            return;
         }
     }
 
@@ -674,8 +611,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->autoFocus());
-    } else if (mDevice && mDevice->ops->auto_focus) {
-        return mDevice->ops->auto_focus(mDevice);
     }
     return INVALID_OPERATION;
 }
@@ -686,8 +621,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->cancelAutoFocus());
-    } else if (mDevice && mDevice->ops->cancel_auto_focus) {
-        return mDevice->ops->cancel_auto_focus(mDevice);
     }
     return INVALID_OPERATION;
 }
@@ -698,8 +631,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->takePicture());
-    } else if (mDevice && mDevice->ops->take_picture) {
-        return mDevice->ops->take_picture(mDevice);
     }
     return INVALID_OPERATION;
 }
@@ -710,8 +641,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->cancelPicture());
-    } else if (mDevice && mDevice->ops->cancel_picture) {
-        return mDevice->ops->cancel_picture(mDevice);
     }
     return INVALID_OPERATION;
 }
@@ -722,8 +651,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->setParameters(params.flatten().string()));
-    } else if (mDevice && mDevice->ops->set_parameters) {
-        return mDevice->ops->set_parameters(mDevice, params.flatten().string());
     }
     return INVALID_OPERATION;
 }
@@ -740,14 +667,6 @@
                 });
         String8 tmp(outParam.c_str());
         parms.unflatten(tmp);
-    } else if (mDevice && mDevice->ops->get_parameters) {
-        char *temp = mDevice->ops->get_parameters(mDevice);
-        String8 str_parms(temp);
-        if (mDevice->ops->put_parameters)
-            mDevice->ops->put_parameters(mDevice, temp);
-        else
-            free(temp);
-        parms.unflatten(str_parms);
     }
     return parms;
 }
@@ -758,8 +677,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         return CameraProviderManager::mapToStatusT(
                 mHidlDevice->sendCommand((CommandType) cmd, arg1, arg2));
-    } else if (mDevice && mDevice->ops->send_command) {
-        return mDevice->ops->send_command(mDevice, cmd, arg1, arg2);
     }
     return INVALID_OPERATION;
 }
@@ -773,8 +690,6 @@
     if (CC_LIKELY(mHidlDevice != nullptr)) {
         mHidlDevice->close();
         mHidlDevice.clear();
-    } else if (mDevice && mDevice->ops->release) {
-        mDevice->ops->release(mDevice);
     }
 }
 
@@ -790,15 +705,10 @@
         Status s = mHidlDevice->dumpState(handle);
         native_handle_delete(handle);
         return CameraProviderManager::mapToStatusT(s);
-    } else if (mDevice && mDevice->ops->dump) {
-        return mDevice->ops->dump(mDevice, fd);
     }
     return OK; // It's fine if the HAL doesn't implement dump()
 }
 
-/**
- * Methods for legacy (non-HIDL) path follows
- */
 void CameraHardwareInterface::sNotifyCb(int32_t msg_type, int32_t ext1,
                         int32_t ext2, void *user)
 {
@@ -868,177 +778,4 @@
     mem->decStrong(mem);
 }
 
-ANativeWindow* CameraHardwareInterface::sToAnw(void *user)
-{
-    CameraHardwareInterface *object =
-            reinterpret_cast<CameraHardwareInterface *>(user);
-    return object->mPreviewWindow.get();
-}
-#define anw(n) sToAnw(((struct camera_preview_window *)(n))->user)
-#define hwi(n) reinterpret_cast<CameraHardwareInterface *>(\
-    ((struct camera_preview_window *)(n))->user)
-
-int CameraHardwareInterface::sDequeueBuffer(struct preview_stream_ops* w,
-                            buffer_handle_t** buffer, int *stride)
-{
-    int rc;
-    ANativeWindow *a = anw(w);
-    ANativeWindowBuffer* anb;
-    rc = native_window_dequeue_buffer_and_wait(a, &anb);
-    if (rc == OK) {
-        *buffer = &anb->handle;
-        *stride = anb->stride;
-    }
-    return rc;
-}
-
-#ifndef container_of
-#define container_of(ptr, type, member) ({                      \
-    const __typeof__(((type *) 0)->member) *__mptr = (ptr);     \
-    (type *) ((char *) __mptr - (char *)(&((type *)0)->member)); })
-#endif
-
-int CameraHardwareInterface::sLockBuffer(struct preview_stream_ops* w,
-                  buffer_handle_t* /*buffer*/)
-{
-    ANativeWindow *a = anw(w);
-    (void)a;
-    return 0;
-}
-
-int CameraHardwareInterface::sEnqueueBuffer(struct preview_stream_ops* w,
-                  buffer_handle_t* buffer)
-{
-    ANativeWindow *a = anw(w);
-    return a->queueBuffer(a,
-              container_of(buffer, ANativeWindowBuffer, handle), -1);
-}
-
-int CameraHardwareInterface::sCancelBuffer(struct preview_stream_ops* w,
-                  buffer_handle_t* buffer)
-{
-    ANativeWindow *a = anw(w);
-    return a->cancelBuffer(a,
-              container_of(buffer, ANativeWindowBuffer, handle), -1);
-}
-
-int CameraHardwareInterface::sSetBufferCount(struct preview_stream_ops* w, int count)
-{
-    ANativeWindow *a = anw(w);
-
-    if (a != nullptr) {
-        // Workaround for b/27039775
-        // Previously, setting the buffer count would reset the buffer
-        // queue's flag that allows for all buffers to be dequeued on the
-        // producer side, instead of just the producer's declared max count,
-        // if no filled buffers have yet been queued by the producer.  This
-        // reset no longer happens, but some HALs depend on this behavior,
-        // so it needs to be maintained for HAL backwards compatibility.
-        // Simulate the prior behavior by disconnecting/reconnecting to the
-        // window and setting the values again.  This has the drawback of
-        // actually causing memory reallocation, which may not have happened
-        // in the past.
-        CameraHardwareInterface *hw = hwi(w);
-        native_window_api_disconnect(a, NATIVE_WINDOW_API_CAMERA);
-        native_window_api_connect(a, NATIVE_WINDOW_API_CAMERA);
-        if (hw->mPreviewScalingMode != NOT_SET) {
-            native_window_set_scaling_mode(a, hw->mPreviewScalingMode);
-        }
-        if (hw->mPreviewTransform != NOT_SET) {
-            native_window_set_buffers_transform(a, hw->mPreviewTransform);
-        }
-        if (hw->mPreviewWidth != NOT_SET) {
-            native_window_set_buffers_dimensions(a,
-                    hw->mPreviewWidth, hw->mPreviewHeight);
-            native_window_set_buffers_format(a, hw->mPreviewFormat);
-        }
-        if (hw->mPreviewUsage != 0) {
-            native_window_set_usage(a, hw->mPreviewUsage);
-        }
-        if (hw->mPreviewSwapInterval != NOT_SET) {
-            a->setSwapInterval(a, hw->mPreviewSwapInterval);
-        }
-        if (hw->mPreviewCrop.left != NOT_SET) {
-            native_window_set_crop(a, &(hw->mPreviewCrop));
-        }
-    }
-
-    return native_window_set_buffer_count(a, count);
-}
-
-int CameraHardwareInterface::sSetBuffersGeometry(struct preview_stream_ops* w,
-                  int width, int height, int format)
-{
-    int rc;
-    ANativeWindow *a = anw(w);
-    CameraHardwareInterface *hw = hwi(w);
-    hw->mPreviewWidth = width;
-    hw->mPreviewHeight = height;
-    hw->mPreviewFormat = format;
-    rc = native_window_set_buffers_dimensions(a, width, height);
-    if (rc == OK) {
-        rc = native_window_set_buffers_format(a, format);
-    }
-    return rc;
-}
-
-int CameraHardwareInterface::sSetCrop(struct preview_stream_ops *w,
-                  int left, int top, int right, int bottom)
-{
-    ANativeWindow *a = anw(w);
-    CameraHardwareInterface *hw = hwi(w);
-    hw->mPreviewCrop.left = left;
-    hw->mPreviewCrop.top = top;
-    hw->mPreviewCrop.right = right;
-    hw->mPreviewCrop.bottom = bottom;
-    return native_window_set_crop(a, &(hw->mPreviewCrop));
-}
-
-int CameraHardwareInterface::sSetTimestamp(struct preview_stream_ops *w,
-                           int64_t timestamp) {
-    ANativeWindow *a = anw(w);
-    return native_window_set_buffers_timestamp(a, timestamp);
-}
-
-int CameraHardwareInterface::sSetUsage(struct preview_stream_ops* w, int usage)
-{
-    ANativeWindow *a = anw(w);
-    CameraHardwareInterface *hw = hwi(w);
-    hw->mPreviewUsage = usage;
-    return native_window_set_usage(a, usage);
-}
-
-int CameraHardwareInterface::sSetSwapInterval(struct preview_stream_ops *w, int interval)
-{
-    ANativeWindow *a = anw(w);
-    CameraHardwareInterface *hw = hwi(w);
-    hw->mPreviewSwapInterval = interval;
-    return a->setSwapInterval(a, interval);
-}
-
-int CameraHardwareInterface::sGetMinUndequeuedBufferCount(
-                  const struct preview_stream_ops *w,
-                  int *count)
-{
-    ANativeWindow *a = anw(w);
-    return a->query(a, NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, count);
-}
-
-void CameraHardwareInterface::initHalPreviewWindow()
-{
-    mHalPreviewWindow.nw.cancel_buffer = sCancelBuffer;
-    mHalPreviewWindow.nw.lock_buffer = sLockBuffer;
-    mHalPreviewWindow.nw.dequeue_buffer = sDequeueBuffer;
-    mHalPreviewWindow.nw.enqueue_buffer = sEnqueueBuffer;
-    mHalPreviewWindow.nw.set_buffer_count = sSetBufferCount;
-    mHalPreviewWindow.nw.set_buffers_geometry = sSetBuffersGeometry;
-    mHalPreviewWindow.nw.set_crop = sSetCrop;
-    mHalPreviewWindow.nw.set_timestamp = sSetTimestamp;
-    mHalPreviewWindow.nw.set_usage = sSetUsage;
-    mHalPreviewWindow.nw.set_swap_interval = sSetSwapInterval;
-
-    mHalPreviewWindow.nw.get_min_undequeued_buffer_count =
-            sGetMinUndequeuedBufferCount;
-}
-
 }; // namespace android
diff --git a/services/camera/libcameraservice/device1/CameraHardwareInterface.h b/services/camera/libcameraservice/device1/CameraHardwareInterface.h
index 1c38d00..11d3edd 100644
--- a/services/camera/libcameraservice/device1/CameraHardwareInterface.h
+++ b/services/camera/libcameraservice/device1/CameraHardwareInterface.h
@@ -90,7 +90,6 @@
 
 public:
     explicit CameraHardwareInterface(const char *name):
-            mDevice(nullptr),
             mHidlDevice(nullptr),
             mName(name),
             mPreviewScalingMode(NOT_SET),
@@ -299,7 +298,6 @@
     status_t dump(int fd, const Vector<String16>& /*args*/) const;
 
 private:
-    camera_device_t *mDevice;
     sp<hardware::camera::device::V1_0::ICameraDevice> mHidlDevice;
     String8 mName;
 
@@ -369,41 +367,6 @@
 
     static void sPutMemory(camera_memory_t *data);
 
-    static ANativeWindow *sToAnw(void *user);
-
-    static int sDequeueBuffer(struct preview_stream_ops* w,
-                                buffer_handle_t** buffer, int *stride);
-
-    static int sLockBuffer(struct preview_stream_ops* w,
-                      buffer_handle_t* /*buffer*/);
-
-    static int sEnqueueBuffer(struct preview_stream_ops* w,
-                      buffer_handle_t* buffer);
-
-    static int sCancelBuffer(struct preview_stream_ops* w,
-                      buffer_handle_t* buffer);
-
-    static int sSetBufferCount(struct preview_stream_ops* w, int count);
-
-    static int sSetBuffersGeometry(struct preview_stream_ops* w,
-                      int width, int height, int format);
-
-    static int sSetCrop(struct preview_stream_ops *w,
-                      int left, int top, int right, int bottom);
-
-    static int sSetTimestamp(struct preview_stream_ops *w,
-                               int64_t timestamp);
-
-    static int sSetUsage(struct preview_stream_ops* w, int usage);
-
-    static int sSetSwapInterval(struct preview_stream_ops *w, int interval);
-
-    static int sGetMinUndequeuedBufferCount(
-                      const struct preview_stream_ops *w,
-                      int *count);
-
-    void initHalPreviewWindow();
-
     std::pair<bool, uint64_t> getBufferId(ANativeWindowBuffer* anb);
     void cleanupCirculatingBuffers();
 
@@ -459,13 +422,6 @@
 
     sp<ANativeWindow>        mPreviewWindow;
 
-    struct camera_preview_window {
-        struct preview_stream_ops nw;
-        void *user;
-    };
-
-    struct camera_preview_window mHalPreviewWindow;
-
     notify_callback               mNotifyCb;
     data_callback                 mDataCb;
     data_callback_timestamp       mDataCbTimestamp;
diff --git a/services/camera/libcameraservice/device3/Camera3Device.cpp b/services/camera/libcameraservice/device3/Camera3Device.cpp
index 89d2c65..66a2c79 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.cpp
+++ b/services/camera/libcameraservice/device3/Camera3Device.cpp
@@ -3058,24 +3058,20 @@
 Camera3Device::HalInterface::HalInterface(
             sp<ICameraDeviceSession> &session,
             std::shared_ptr<RequestMetadataQueue> queue) :
-        mHal3Device(nullptr),
         mHidlSession(session),
         mRequestMetadataQueue(queue) {}
 
-Camera3Device::HalInterface::HalInterface() :
-        mHal3Device(nullptr) {}
+Camera3Device::HalInterface::HalInterface() {}
 
 Camera3Device::HalInterface::HalInterface(const HalInterface& other) :
-        mHal3Device(other.mHal3Device),
         mHidlSession(other.mHidlSession),
         mRequestMetadataQueue(other.mRequestMetadataQueue) {}
 
 bool Camera3Device::HalInterface::valid() {
-    return (mHal3Device != nullptr) || (mHidlSession != nullptr);
+    return (mHidlSession != nullptr);
 }
 
 void Camera3Device::HalInterface::clear() {
-    mHal3Device = nullptr;
     mHidlSession.clear();
 }
 
@@ -3090,72 +3086,60 @@
     if (!valid()) return INVALID_OPERATION;
     status_t res = OK;
 
-    if (mHal3Device != nullptr) {
-        const camera_metadata *r;
-        r = mHal3Device->ops->construct_default_request_settings(
-                mHal3Device, templateId);
-        if (r == nullptr) return BAD_VALUE;
-        *requestTemplate = clone_camera_metadata(r);
-        if (requestTemplate == nullptr) {
-            ALOGE("%s: Unable to clone camera metadata received from HAL",
-                    __FUNCTION__);
-            return INVALID_OPERATION;
-        }
-    } else {
-        common::V1_0::Status status;
-        RequestTemplate id;
-        switch (templateId) {
-            case CAMERA3_TEMPLATE_PREVIEW:
-                id = RequestTemplate::PREVIEW;
-                break;
-            case CAMERA3_TEMPLATE_STILL_CAPTURE:
-                id = RequestTemplate::STILL_CAPTURE;
-                break;
-            case CAMERA3_TEMPLATE_VIDEO_RECORD:
-                id = RequestTemplate::VIDEO_RECORD;
-                break;
-            case CAMERA3_TEMPLATE_VIDEO_SNAPSHOT:
-                id = RequestTemplate::VIDEO_SNAPSHOT;
-                break;
-            case CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG:
-                id = RequestTemplate::ZERO_SHUTTER_LAG;
-                break;
-            case CAMERA3_TEMPLATE_MANUAL:
-                id = RequestTemplate::MANUAL;
-                break;
-            default:
-                // Unknown template ID
-                return BAD_VALUE;
-        }
-        auto err = mHidlSession->constructDefaultRequestSettings(id,
-                [&status, &requestTemplate]
-                (common::V1_0::Status s, const device::V3_2::CameraMetadata& request) {
-                    status = s;
-                    if (status == common::V1_0::Status::OK) {
-                        const camera_metadata *r =
-                                reinterpret_cast<const camera_metadata_t*>(request.data());
-                        size_t expectedSize = request.size();
-                        int ret = validate_camera_metadata_structure(r, &expectedSize);
-                        if (ret == OK || ret == CAMERA_METADATA_VALIDATION_SHIFTED) {
-                            *requestTemplate = clone_camera_metadata(r);
-                            if (*requestTemplate == nullptr) {
-                                ALOGE("%s: Unable to clone camera metadata received from HAL",
-                                        __FUNCTION__);
-                                status = common::V1_0::Status::INTERNAL_ERROR;
-                            }
-                        } else {
-                            ALOGE("%s: Malformed camera metadata received from HAL", __FUNCTION__);
+    common::V1_0::Status status;
+    RequestTemplate id;
+    switch (templateId) {
+        case CAMERA3_TEMPLATE_PREVIEW:
+            id = RequestTemplate::PREVIEW;
+            break;
+        case CAMERA3_TEMPLATE_STILL_CAPTURE:
+            id = RequestTemplate::STILL_CAPTURE;
+            break;
+        case CAMERA3_TEMPLATE_VIDEO_RECORD:
+            id = RequestTemplate::VIDEO_RECORD;
+            break;
+        case CAMERA3_TEMPLATE_VIDEO_SNAPSHOT:
+            id = RequestTemplate::VIDEO_SNAPSHOT;
+            break;
+        case CAMERA3_TEMPLATE_ZERO_SHUTTER_LAG:
+            id = RequestTemplate::ZERO_SHUTTER_LAG;
+            break;
+        case CAMERA3_TEMPLATE_MANUAL:
+            id = RequestTemplate::MANUAL;
+            break;
+        default:
+            // Unknown template ID
+            return BAD_VALUE;
+    }
+    auto err = mHidlSession->constructDefaultRequestSettings(id,
+            [&status, &requestTemplate]
+            (common::V1_0::Status s, const device::V3_2::CameraMetadata& request) {
+                status = s;
+                if (status == common::V1_0::Status::OK) {
+                    const camera_metadata *r =
+                            reinterpret_cast<const camera_metadata_t*>(request.data());
+                    size_t expectedSize = request.size();
+                    int ret = validate_camera_metadata_structure(r, &expectedSize);
+                    if (ret == OK || ret == CAMERA_METADATA_VALIDATION_SHIFTED) {
+                        *requestTemplate = clone_camera_metadata(r);
+                        if (*requestTemplate == nullptr) {
+                            ALOGE("%s: Unable to clone camera metadata received from HAL",
+                                    __FUNCTION__);
                             status = common::V1_0::Status::INTERNAL_ERROR;
                         }
+                    } else {
+                        ALOGE("%s: Malformed camera metadata received from HAL", __FUNCTION__);
+                        status = common::V1_0::Status::INTERNAL_ERROR;
                     }
-                });
-        if (!err.isOk()) {
-            ALOGE("%s: Transaction error: %s", __FUNCTION__, err.description().c_str());
-            res = DEAD_OBJECT;
-        } else {
-            res = CameraProviderManager::mapToStatusT(status);
-        }
+                }
+            });
+    if (!err.isOk()) {
+        ALOGE("%s: Transaction error: %s", __FUNCTION__, err.description().c_str());
+        res = DEAD_OBJECT;
+    } else {
+        res = CameraProviderManager::mapToStatusT(status);
     }
+
     return res;
 }
 
@@ -3164,138 +3148,135 @@
     if (!valid()) return INVALID_OPERATION;
     status_t res = OK;
 
-    if (mHal3Device != nullptr) {
-        res = mHal3Device->ops->configure_streams(mHal3Device, config);
-    } else {
-        // Convert stream config to HIDL
-        std::set<int> activeStreams;
-        StreamConfiguration requestedConfiguration;
-        requestedConfiguration.streams.resize(config->num_streams);
-        for (size_t i = 0; i < config->num_streams; i++) {
-            Stream &dst = requestedConfiguration.streams[i];
-            camera3_stream_t *src = config->streams[i];
+    // Convert stream config to HIDL
+    std::set<int> activeStreams;
+    StreamConfiguration requestedConfiguration;
+    requestedConfiguration.streams.resize(config->num_streams);
+    for (size_t i = 0; i < config->num_streams; i++) {
+        Stream &dst = requestedConfiguration.streams[i];
+        camera3_stream_t *src = config->streams[i];
 
-            Camera3Stream* cam3stream = Camera3Stream::cast(src);
-            cam3stream->setBufferFreedListener(this);
-            int streamId = cam3stream->getId();
-            StreamType streamType;
-            switch (src->stream_type) {
-                case CAMERA3_STREAM_OUTPUT:
-                    streamType = StreamType::OUTPUT;
-                    break;
-                case CAMERA3_STREAM_INPUT:
-                    streamType = StreamType::INPUT;
-                    break;
-                default:
-                    ALOGE("%s: Stream %d: Unsupported stream type %d",
-                            __FUNCTION__, streamId, config->streams[i]->stream_type);
-                    return BAD_VALUE;
+        Camera3Stream* cam3stream = Camera3Stream::cast(src);
+        cam3stream->setBufferFreedListener(this);
+        int streamId = cam3stream->getId();
+        StreamType streamType;
+        switch (src->stream_type) {
+            case CAMERA3_STREAM_OUTPUT:
+                streamType = StreamType::OUTPUT;
+                break;
+            case CAMERA3_STREAM_INPUT:
+                streamType = StreamType::INPUT;
+                break;
+            default:
+                ALOGE("%s: Stream %d: Unsupported stream type %d",
+                        __FUNCTION__, streamId, config->streams[i]->stream_type);
+                return BAD_VALUE;
+        }
+        dst.id = streamId;
+        dst.streamType = streamType;
+        dst.width = src->width;
+        dst.height = src->height;
+        dst.format = mapToPixelFormat(src->format);
+        dst.usage = mapToConsumerUsage(src->usage);
+        dst.dataSpace = mapToHidlDataspace(src->data_space);
+        dst.rotation = mapToStreamRotation((camera3_stream_rotation_t) src->rotation);
+
+        activeStreams.insert(streamId);
+        // Create Buffer ID map if necessary
+        if (mBufferIdMaps.count(streamId) == 0) {
+            mBufferIdMaps.emplace(streamId, BufferIdMap{});
+        }
+    }
+    // remove BufferIdMap for deleted streams
+    for(auto it = mBufferIdMaps.begin(); it != mBufferIdMaps.end();) {
+        int streamId = it->first;
+        bool active = activeStreams.count(streamId) > 0;
+        if (!active) {
+            it = mBufferIdMaps.erase(it);
+        } else {
+            ++it;
+        }
+    }
+
+    res = mapToStreamConfigurationMode(
+            (camera3_stream_configuration_mode_t) config->operation_mode,
+            /*out*/ &requestedConfiguration.operationMode);
+    if (res != OK) {
+        return res;
+    }
+
+    // Invoke configureStreams
+
+    HalStreamConfiguration finalConfiguration;
+    common::V1_0::Status status;
+    auto err = mHidlSession->configureStreams(requestedConfiguration,
+            [&status, &finalConfiguration]
+            (common::V1_0::Status s, const HalStreamConfiguration& halConfiguration) {
+                finalConfiguration = halConfiguration;
+                status = s;
+            });
+    if (!err.isOk()) {
+        ALOGE("%s: Transaction error: %s", __FUNCTION__, err.description().c_str());
+        return DEAD_OBJECT;
+    }
+
+    if (status != common::V1_0::Status::OK ) {
+        return CameraProviderManager::mapToStatusT(status);
+    }
+
+    // And convert output stream configuration from HIDL
+
+    for (size_t i = 0; i < config->num_streams; i++) {
+        camera3_stream_t *dst = config->streams[i];
+        int streamId = Camera3Stream::cast(dst)->getId();
+
+        // Start scan at i, with the assumption that the stream order matches
+        size_t realIdx = i;
+        bool found = false;
+        for (size_t idx = 0; idx < finalConfiguration.streams.size(); idx++) {
+            if (finalConfiguration.streams[realIdx].id == streamId) {
+                found = true;
+                break;
             }
-            dst.id = streamId;
-            dst.streamType = streamType;
-            dst.width = src->width;
-            dst.height = src->height;
-            dst.format = mapToPixelFormat(src->format);
-            dst.usage = mapToConsumerUsage(src->usage);
-            dst.dataSpace = mapToHidlDataspace(src->data_space);
-            dst.rotation = mapToStreamRotation((camera3_stream_rotation_t) src->rotation);
+            realIdx = (realIdx >= finalConfiguration.streams.size()) ? 0 : realIdx + 1;
+        }
+        if (!found) {
+            ALOGE("%s: Stream %d not found in stream configuration response from HAL",
+                    __FUNCTION__, streamId);
+            return INVALID_OPERATION;
+        }
+        HalStream &src = finalConfiguration.streams[realIdx];
 
-            activeStreams.insert(streamId);
-            // Create Buffer ID map if necessary
-            if (mBufferIdMaps.count(streamId) == 0) {
-                mBufferIdMaps.emplace(streamId, BufferIdMap{});
+        int overrideFormat = mapToFrameworkFormat(src.overrideFormat);
+        if (dst->format != HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
+            if (dst->format != overrideFormat) {
+                ALOGE("%s: Stream %d: Format override not allowed for format 0x%x", __FUNCTION__,
+                        streamId, dst->format);
             }
-        }
-        // remove BufferIdMap for deleted streams
-        for(auto it = mBufferIdMaps.begin(); it != mBufferIdMaps.end();) {
-            int streamId = it->first;
-            bool active = activeStreams.count(streamId) > 0;
-            if (!active) {
-                it = mBufferIdMaps.erase(it);
-            } else {
-                ++it;
-            }
+        } else {
+            // Override allowed with IMPLEMENTATION_DEFINED
+            dst->format = overrideFormat;
         }
 
-        res = mapToStreamConfigurationMode(
-                (camera3_stream_configuration_mode_t) config->operation_mode,
-                /*out*/ &requestedConfiguration.operationMode);
-        if (res != OK) {
-            return res;
-        }
-
-        // Invoke configureStreams
-
-        HalStreamConfiguration finalConfiguration;
-        common::V1_0::Status status;
-        auto err = mHidlSession->configureStreams(requestedConfiguration,
-                [&status, &finalConfiguration]
-                (common::V1_0::Status s, const HalStreamConfiguration& halConfiguration) {
-                    finalConfiguration = halConfiguration;
-                    status = s;
-                });
-        if (!err.isOk()) {
-            ALOGE("%s: Transaction error: %s", __FUNCTION__, err.description().c_str());
-            return DEAD_OBJECT;
-        }
-
-        if (status != common::V1_0::Status::OK ) {
-            return CameraProviderManager::mapToStatusT(status);
-        }
-
-        // And convert output stream configuration from HIDL
-
-        for (size_t i = 0; i < config->num_streams; i++) {
-            camera3_stream_t *dst = config->streams[i];
-            int streamId = Camera3Stream::cast(dst)->getId();
-
-            // Start scan at i, with the assumption that the stream order matches
-            size_t realIdx = i;
-            bool found = false;
-            for (size_t idx = 0; idx < finalConfiguration.streams.size(); idx++) {
-                if (finalConfiguration.streams[realIdx].id == streamId) {
-                    found = true;
-                    break;
-                }
-                realIdx = (realIdx >= finalConfiguration.streams.size()) ? 0 : realIdx + 1;
-            }
-            if (!found) {
-                ALOGE("%s: Stream %d not found in stream configuration response from HAL",
+        if (dst->stream_type == CAMERA3_STREAM_INPUT) {
+            if (src.producerUsage != 0) {
+                ALOGE("%s: Stream %d: INPUT streams must have 0 for producer usage",
                         __FUNCTION__, streamId);
                 return INVALID_OPERATION;
             }
-            HalStream &src = finalConfiguration.streams[realIdx];
-
-            int overrideFormat = mapToFrameworkFormat(src.overrideFormat);
-            if (dst->format != HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED) {
-                if (dst->format != overrideFormat) {
-                    ALOGE("%s: Stream %d: Format override not allowed for format 0x%x", __FUNCTION__,
-                            streamId, dst->format);
-                }
-            } else {
-                // Override allowed with IMPLEMENTATION_DEFINED
-                dst->format = overrideFormat;
+            dst->usage = mapConsumerToFrameworkUsage(src.consumerUsage);
+        } else {
+            // OUTPUT
+            if (src.consumerUsage != 0) {
+                ALOGE("%s: Stream %d: OUTPUT streams must have 0 for consumer usage",
+                        __FUNCTION__, streamId);
+                return INVALID_OPERATION;
             }
-
-            if (dst->stream_type == CAMERA3_STREAM_INPUT) {
-                if (src.producerUsage != 0) {
-                    ALOGE("%s: Stream %d: INPUT streams must have 0 for producer usage",
-                            __FUNCTION__, streamId);
-                    return INVALID_OPERATION;
-                }
-                dst->usage = mapConsumerToFrameworkUsage(src.consumerUsage);
-            } else {
-                // OUTPUT
-                if (src.consumerUsage != 0) {
-                    ALOGE("%s: Stream %d: OUTPUT streams must have 0 for consumer usage",
-                            __FUNCTION__, streamId);
-                    return INVALID_OPERATION;
-                }
-                dst->usage = mapProducerToFrameworkUsage(src.producerUsage);
-            }
-            dst->max_buffers = src.maxBuffers;
+            dst->usage = mapProducerToFrameworkUsage(src.producerUsage);
         }
+        dst->max_buffers = src.maxBuffers;
     }
+
     return res;
 }
 
@@ -3451,14 +3432,11 @@
     if (!valid()) return INVALID_OPERATION;
     status_t res = OK;
 
-    if (mHal3Device != nullptr) {
-        res = mHal3Device->ops->process_capture_request(mHal3Device, request);
-    } else {
-        uint32_t numRequestProcessed = 0;
-        std::vector<camera3_capture_request_t*> requests(1);
-        requests[0] = request;
-        res = processBatchCaptureRequests(requests, &numRequestProcessed);
-    }
+    uint32_t numRequestProcessed = 0;
+    std::vector<camera3_capture_request_t*> requests(1);
+    requests[0] = request;
+    res = processBatchCaptureRequests(requests, &numRequestProcessed);
+
     return res;
 }
 
@@ -3467,31 +3445,24 @@
     if (!valid()) return INVALID_OPERATION;
     status_t res = OK;
 
-    if (mHal3Device != nullptr) {
-        res = mHal3Device->ops->flush(mHal3Device);
+    auto err = mHidlSession->flush();
+    if (!err.isOk()) {
+        ALOGE("%s: Transaction error: %s", __FUNCTION__, err.description().c_str());
+        res = DEAD_OBJECT;
     } else {
-        auto err = mHidlSession->flush();
-        if (!err.isOk()) {
-            ALOGE("%s: Transaction error: %s", __FUNCTION__, err.description().c_str());
-            res = DEAD_OBJECT;
-        } else {
-            res = CameraProviderManager::mapToStatusT(err);
-        }
+        res = CameraProviderManager::mapToStatusT(err);
     }
+
     return res;
 }
 
-status_t Camera3Device::HalInterface::dump(int fd) {
+status_t Camera3Device::HalInterface::dump(int /*fd*/) {
     ATRACE_NAME("CameraHal::dump");
     if (!valid()) return INVALID_OPERATION;
-    status_t res = OK;
 
-    if (mHal3Device != nullptr) {
-        mHal3Device->ops->dump(mHal3Device, fd);
-    } else {
-        // Handled by CameraProviderManager::dump
-    }
-    return res;
+    // Handled by CameraProviderManager::dump
+
+    return OK;
 }
 
 status_t Camera3Device::HalInterface::close() {
@@ -3499,15 +3470,12 @@
     if (!valid()) return INVALID_OPERATION;
     status_t res = OK;
 
-    if (mHal3Device != nullptr) {
-        mHal3Device->common.close(&mHal3Device->common);
-    } else {
-        auto err = mHidlSession->close();
-        // Interface will be dead shortly anyway, so don't log errors
-        if (!err.isOk()) {
-            res = DEAD_OBJECT;
-        }
+    auto err = mHidlSession->close();
+    // Interface will be dead shortly anyway, so don't log errors
+    if (!err.isOk()) {
+        res = DEAD_OBJECT;
     }
+
     return res;
 }
 
diff --git a/services/camera/libcameraservice/device3/Camera3Device.h b/services/camera/libcameraservice/device3/Camera3Device.h
index d700e03..d5e611c 100644
--- a/services/camera/libcameraservice/device3/Camera3Device.h
+++ b/services/camera/libcameraservice/device3/Camera3Device.h
@@ -271,7 +271,6 @@
         void getInflightBufferKeys(std::vector<std::pair<int32_t, int32_t>>* out);
 
       private:
-        camera3_device_t *mHal3Device;
         sp<hardware::camera::device::V3_2::ICameraDeviceSession> mHidlSession;
         std::shared_ptr<RequestMetadataQueue> mRequestMetadataQueue;