diff --git a/camera/common/1.0/Android.bp b/camera/common/1.0/Android.bp
new file mode 100644
index 0000000..9707ffe
--- /dev/null
+++ b/camera/common/1.0/Android.bp
@@ -0,0 +1,46 @@
+// This file is autogenerated by hidl-gen. Do not edit manually.
+
+genrule {
+    name: "android.hardware.camera.common@1.0_genc++",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces android.hardware.camera.common@1.0",
+    srcs: [
+        "types.hal",
+    ],
+    out: [
+        "android/hardware/camera/common/1.0/types.cpp",
+    ],
+}
+
+genrule {
+    name: "android.hardware.camera.common@1.0_genc++_headers",
+    tools: ["hidl-gen"],
+    cmd: "$(location hidl-gen) -o $(genDir) -Lc++ -randroid.hardware:hardware/interfaces android.hardware.camera.common@1.0",
+    srcs: [
+        "types.hal",
+    ],
+    out: [
+        "android/hardware/camera/common/1.0/types.h",
+    ],
+}
+
+cc_library_shared {
+    name: "android.hardware.camera.common@1.0",
+    generated_sources: ["android.hardware.camera.common@1.0_genc++"],
+    generated_headers: ["android.hardware.camera.common@1.0_genc++_headers"],
+    export_generated_headers: ["android.hardware.camera.common@1.0_genc++_headers"],
+    shared_libs: [
+        "libhidlbase",
+        "libhidltransport",
+        "libhwbinder",
+        "liblog",
+        "libutils",
+        "libcutils",
+    ],
+    export_shared_lib_headers: [
+        "libhidlbase",
+        "libhidltransport",
+        "libhwbinder",
+        "libutils",
+    ],
+}
diff --git a/camera/common/1.0/Android.mk b/camera/common/1.0/Android.mk
new file mode 100644
index 0000000..4cb879c
--- /dev/null
+++ b/camera/common/1.0/Android.mk
@@ -0,0 +1,336 @@
+# This file is autogenerated by hidl-gen. Do not edit manually.
+
+LOCAL_PATH := $(call my-dir)
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.camera.common@1.0-java
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(local-generated-sources-dir)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+#
+# Build types.hal (CameraDeviceStatus)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/CameraDeviceStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.CameraDeviceStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (CameraMetadataType)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/CameraMetadataType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.CameraMetadataType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (CameraResourceCost)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/CameraResourceCost.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.CameraResourceCost
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (Status)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/Status.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.Status
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TagBoundaryId)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/TagBoundaryId.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.TagBoundaryId
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TorchMode)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/TorchMode.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.TorchMode
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TorchModeStatus)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/TorchModeStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.TorchModeStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (VendorTag)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/VendorTag.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.VendorTag
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (VendorTagSection)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/VendorTagSection.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.VendorTagSection
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_JAVA_LIBRARY)
+
+
+################################################################################
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := android.hardware.camera.common@1.0-java-static
+LOCAL_MODULE_CLASS := JAVA_LIBRARIES
+
+intermediates := $(local-generated-sources-dir)
+
+HIDL := $(HOST_OUT_EXECUTABLES)/hidl-gen$(HOST_EXECUTABLE_SUFFIX)
+
+#
+# Build types.hal (CameraDeviceStatus)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/CameraDeviceStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.CameraDeviceStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (CameraMetadataType)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/CameraMetadataType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.CameraMetadataType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (CameraResourceCost)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/CameraResourceCost.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.CameraResourceCost
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (Status)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/Status.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.Status
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TagBoundaryId)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/TagBoundaryId.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.TagBoundaryId
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TorchMode)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/TorchMode.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.TorchMode
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (TorchModeStatus)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/TorchModeStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.TorchModeStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (VendorTag)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/VendorTag.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.VendorTag
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (VendorTagSection)
+#
+GEN := $(intermediates)/android/hardware/camera/common/1.0/VendorTagSection.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava -randroid.hardware:hardware/interfaces \
+        android.hardware.camera.common@1.0::types.VendorTagSection
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+include $(BUILD_STATIC_JAVA_LIBRARY)
+
+
+
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/camera/common/1.0/types.hal b/camera/common/1.0/types.hal
new file mode 100644
index 0000000..0393107
--- /dev/null
+++ b/camera/common/1.0/types.hal
@@ -0,0 +1,413 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.camera.common@1.0;
+
+/**
+ * Common enumeration and structure definitions for all HALs under
+ * android.hardware.camera
+ */
+
+/**
+ * Status codes for camera HAL method calls.
+ *
+ */
+enum Status : uint32_t {
+    /**
+     * Method call succeeded
+     */
+    OK = 0,
+
+    /**
+     * One of the arguments to the method call is invalid. For example,
+     * the camera ID is unknown.
+     */
+    ILLEGAL_ARGUMENT = 1,
+
+    /**
+     * The specified camera device is already in use
+     */
+    CAMERA_IN_USE = 2,
+
+    /**
+     * The HAL cannot support more simultaneous cameras in use.
+     */
+    MAX_CAMERAS_IN_USE = 3,
+
+    /**
+     * This HAL does not support this method.
+     */
+    METHOD_NOT_SUPPORTED = 4,
+
+    /**
+     * The specified camera device does not support this operation.
+     */
+    OPERATION_NOT_SUPPORTED = 5,
+
+    /**
+     * This camera device is no longer connected or otherwise available for use
+     */
+    CAMERA_DISCONNECTED = 6,
+
+    /**
+     * The HAL has encountered an internal error and cannot complete the
+     * request.
+     */
+    INTERNAL_ERROR = 7
+};
+
+/**
+ * Possible states that the flash unit on a closed camera device can be set to
+ * via the ICameraProvider::setTorchMode() method.
+ */
+enum TorchMode : uint32_t {
+    OFF = 0, // Turn off the flash
+    ON  = 1  // Turn on the flash to torch mode
+};
+
+/**
+ * Camera metadata type - duplicated from VNDK libcamera_metadata for vendor tag
+ * definitions.
+ */
+enum CameraMetadataType : uint32_t {
+    // Unsigned 8-bit integer (uint8_t)
+    BYTE = 0,
+    // Signed 32-bit integer (int32_t)
+    INT32 = 1,
+    // 32-bit float (float)
+    FLOAT = 2,
+    // Signed 64-bit integer (int64_t)
+    INT64 = 3,
+    // 64-bit float (double)
+    DOUBLE = 4,
+    // A 64-bit fraction (camera_metadata_rational_t)
+    RATIONAL = 5
+};
+
+/**
+ * A single vendor-unique metadata tag.
+ * The full name of the tag is <sectionName>.<tagName>
+ */
+struct VendorTag {
+    uint32_t tagId; // Tag identifier, must be >= TagBoundaryId::VENDOR
+    string tagName; // Name of tag, not including section name
+    CameraMetadataType tagType;
+};
+
+/**
+ * A set of related vendor tags.
+ */
+struct VendorTagSection {
+    string sectionName; // Section name; must be namespaced within vendor's name
+    vec<VendorTag> tags; // List of tags in this section
+};
+
+enum TagBoundaryId : uint32_t {
+    AOSP    = 0x0,         // First valid tag id for android-defined tags
+    VENDOR  = 0x80000000u  // First valid tag id for vendor extension tags
+};
+
+/**
+ * CameraDeviceStatus
+ *
+ * The current status of a camera device, as sent by a camera provider HAL
+ * through the ICameraProviderCallback::cameraDeviceStatusChange() call.
+ *
+ * At startup, the camera service must assume all internal camera devices listed
+ * by ICameraProvider::getCameraIdList() are in the PRESENT state. The provider
+ * must invoke ICameraProviderCallback::cameraDeviceStatusChange to inform the
+ * service of any initially NOT_PRESENT internal devices, and of any PRESENT
+ * external camera devices, as soon as the camera service has called
+ * ICameraProvider::setCallback().
+ *
+ * Allowed state transitions:
+ *      PRESENT            -> NOT_PRESENT
+ *      NOT_PRESENT        -> ENUMERATING
+ *      NOT_PRESENT        -> PRESENT
+ *      ENUMERATING        -> PRESENT
+ *      ENUMERATING        -> NOT_PRESENT
+ */
+enum CameraDeviceStatus : uint32_t {
+    /**
+     * The camera device is not currently connected, and trying to reference it
+     * in provider method calls must return status code ILLEGAL_ARGUMENT.
+     *
+     */
+    NOT_PRESENT = 0,
+
+    /**
+     * The camera device is connected, and opening it is possible, as long as
+     * sufficient resources are available.
+     *
+     * By default, the framework must assume all devices returned by
+     * ICameraProvider::getCameraIdList() are in this state.
+     */
+    PRESENT = 1,
+
+    /**
+     * The camera device is connected, but it is undergoing enumeration and
+     * startup, and so opening the device must return CAMERA_IN_USE.
+     *
+     * Attempting to call ICameraProvider::getCameraCharacteristics() must
+     * succeed, however.
+     */
+    ENUMERATING = 2,
+
+};
+
+/**
+ * TorchModeStatus:
+ *
+ * The current status of the torch mode on a given camera device, sent by a
+ * camera provider HAL via the ICameraProviderCallback::TorchModeStatusChange()
+ * call.
+ *
+ * The torch mode status of a camera device is applicable only when the camera
+ * device is present. The camera service must not call
+ * ICameraProvider::setTorchMode() to turn on torch mode of a camera device if
+ * the camera device is not present. At camera service startup time, the
+ * framework must assume torch modes are in the AVAILABLE_OFF state if the
+ * camera device is present and the camera characteristics entry
+ * android.flash.info.available is reported as true via
+ * ICameraProvider::getCameraCharacteristics() call. The same is assumed for
+ * external camera devices when they are initially connected.
+ *
+ * The camera service requires the following behaviors from the camera provider
+ * HAL when a camera device's status changes:
+ *
+ *  1. A previously-disconnected camera device becomes connected. After
+ *      ICameraProviderCallback::CameraDeviceStatusChange() is invoked to inform
+ *      the camera service that the camera device is present, the framework must
+ *      assume the camera device's torch mode is in AVAILABLE_OFF state if it
+ *      has a flash unit. The camera provider HAL does not need to invoke
+ *      ICameraProviderCallback::TorchModeStatusChange() unless the flash unit
+ *      is unavailable to use by ICameraProvider::setTorchMode().
+ *
+ *  2. A previously-connected camera becomes disconnected. After
+ *      ICameraProviderCallback::CameraDeviceStatusChange() is invoked to inform
+ *      the camera service that the camera device is not present, the framework
+ *      must not call ICameraProvider::setTorchMode() for the disconnected camera
+ *      device until it is connected again. The camera provider HAL does not
+ *      need to invoke ICameraProviderCallback::TorchModeStatusChange()
+ *      separately to inform that the flash unit has become NOT_AVAILABLE.
+ *
+ *  3. openCameraDevice() or openCameraDeviceVersion() is called to open a
+ *      camera device. The camera provider HAL must invoke
+ *      ICameraProviderCallback::TorchModeStatusChange() for all flash units
+ *      that have entered NOT_AVAILABLE state and can not be turned on by
+ *      calling ICameraProvider::setTorchMode() due to this open() call.
+ *      openCameraDevice() must not trigger AVAILABLE_OFF before NOT_AVAILABLE
+ *      for all flash units that have become unavailable.
+ *
+ *  4. ICameraDevice.close() is called to close a camera device. The camera
+ *      provider HAL must call ICameraProviderCallback::torchModeStatusChange()
+ *      for all flash units that have now entered the AVAILABLE_OFF state and
+ *      can be turned on by calling ICameraProvider::setTorchMode() again because
+ *      of sufficient new camera resources being freed up by this close() call.
+ *
+ *  Note that the camera service calling ICameraProvider::setTorchMode()
+ *  successfully must trigger AVAILABLE_OFF or AVAILABLE_ON callback for the
+ *  given camera device. Additionally it must trigger AVAILABLE_OFF callbacks
+ *  for other previously-on torch modes if HAL cannot keep multiple devices'
+ *  flashlights on simultaneously.
+ */
+enum TorchModeStatus : uint32_t {
+    /**
+     * The flash unit is no longer available and the torch mode can not be
+     * turned on by calling setTorchMode(). If the torch mode was AVAILABLE_ON,
+     * the flashlight must be turned off by the provider HAL before the provider
+     * HAL calls torchModeStatusChange().
+     */
+    NOT_AVAILABLE = 0,
+
+    /**
+     * A torch mode has become off and is available to be turned on via
+     * ICameraProvider::setTorchMode(). This may happen in the following
+     * cases:
+     *   1. After the resources to turn on the torch mode have become available.
+     *   2. After ICameraProvider::setTorchMode() is called to turn off the torch
+     *      mode.
+     *   3. After the camera service turned on the torch mode for some other
+     *      camera device and the provider HAL had to turn off the torch modes
+     *      of other camera device(s) that were previously on, due to lack of
+     *      resources to keep them all on.
+     */
+    AVAILABLE_OFF = 1,
+
+    /**
+     * A torch mode has become on and is available to be turned off via
+     * ICameraProvider::setTorchMode(). This can happen only after
+     * ICameraProvider::setTorchMode() has been called to turn on the torch mode.
+     */
+    AVAILABLE_ON = 2,
+
+};
+
+/**
+ * CameraResourceCost:
+ *
+ * Structure defining the abstract resource cost of opening a camera device,
+ * and any usage conflicts between multiple camera devices.
+ *
+ * Obtainable via ICameraDevice::getResourceCost()
+ */
+struct CameraResourceCost {
+    /**
+     * The total resource "cost" of using this camera, represented as an integer
+     * value in the range [0, 100] where 100 represents total usage of the
+     * shared resource that is the limiting bottleneck of the camera subsystem.
+     * This may be a very rough estimate, and is used as a hint to the camera
+     * service to determine when to disallow multiple applications from
+     * simultaneously opening different cameras advertised by the camera
+     * service.
+     *
+     * The camera service must be able to simultaneously open and use any
+     * combination of camera devices exposed by the HAL where the sum of
+     * the resource costs of these cameras is <= 100. For determining cost,
+     * each camera device must be assumed to be configured and operating at
+     * the maximally resource-consuming framerate and stream size settings
+     * available in the configuration settings exposed for that device through
+     * the camera metadata.
+     *
+     * The camera service may still attempt to simultaneously open combinations
+     * of camera devices with a total resource cost > 100. This may succeed or
+     * fail. If this succeeds, combinations of configurations that are not
+     * supported due to resource constraints from having multiple open devices
+     * must fail during the configure calls. If the total resource cost is <=
+     * 100, open and configure must never fail for any stream configuration
+     * settings or other device capabilities that would normally succeed for a
+     * device when it is the only open camera device.
+     *
+     * This field may be used to determine whether background applications are
+     * allowed to use this camera device while other applications are using
+     * other camera devices. Note: multiple applications must never be allowed
+     * by the camera service to simultaneously open the same camera device.
+     *
+     * Example use cases:
+     *
+     * Ex. 1: Camera Device 0 = Back Camera
+     *        Camera Device 1 = Front Camera
+     *   - Using both camera devices causes a large framerate slowdown due to
+     *     limited ISP bandwidth.
+     *
+     *   Configuration:
+     *
+     *   Camera Device 0 - resourceCost = 51
+     *                     conflicting_devices = empty
+     *   Camera Device 1 - resourceCost = 51
+     *                     conflicting_devices = empty
+     *
+     *   Result:
+     *
+     *   Since the sum of the resource costs is > 100, if a higher-priority
+     *   application has either device open, no lower-priority applications must
+     *   be allowed by the camera service to open either device. If a
+     *   lower-priority application is using a device that a higher-priority
+     *   subsequently attempts to open, the lower-priority application must be
+     *   forced to disconnect the the device.
+     *
+     *   If the highest-priority application chooses, it may still attempt to
+     *   open both devices (since these devices are not listed as conflicting in
+     *   the conflicting_devices fields), but usage of these devices may fail in
+     *   the open or configure calls.
+     *
+     * Ex. 2: Camera Device 0 = Left Back Camera
+     *        Camera Device 1 = Right Back Camera
+     *        Camera Device 2 = Combined stereo camera using both right and left
+     *                          back camera sensors used by devices 0, and 1
+     *        Camera Device 3 = Front Camera
+     *   - Due to do hardware constraints, up to two cameras may be open at
+     *     once. The combined stereo camera may never be used at the same time
+     *     as either of the two back camera devices (device 0, 1), and typically
+     *     requires too much bandwidth to use at the same time as the front
+     *     camera (device 3).
+     *
+     *   Configuration:
+     *
+     *   Camera Device 0 - resourceCost = 50
+     *                     conflicting_devices = { 2 }
+     *   Camera Device 1 - resourceCost = 50
+     *                     conflicting_devices = { 2 }
+     *   Camera Device 2 - resourceCost = 100
+     *                     conflicting_devices = { 0, 1 }
+     *   Camera Device 3 - resourceCost = 50
+     *                     conflicting_devices = empty
+     *
+     *   Result:
+     *
+     *   Based on the conflicting_devices fields, the camera service guarantees
+     *   that the following sets of open devices must never be allowed: { 1, 2
+     *   }, { 0, 2 }.
+     *
+     *   Based on the resourceCost fields, if a high-priority foreground
+     *   application is using camera device 0, a background application would be
+     *   allowed to open camera device 1 or 3 (but would be forced to disconnect
+     *   it again if the foreground application opened another device).
+     *
+     *   The highest priority application may still attempt to simultaneously
+     *   open devices 0, 2, and 3, but the HAL may fail in open or configure
+     *   calls for this combination.
+     *
+     * Ex. 3: Camera Device 0 = Back Camera
+     *        Camera Device 1 = Front Camera
+     *        Camera Device 2 = Low-power Front Camera that uses the same sensor
+     *                          as device 1, but only exposes image stream
+     *                          resolutions that can be used in low-power mode
+     *  - Using both front cameras (device 1, 2) at the same time is impossible
+     *    due a shared physical sensor. Using the back and "high-power" front
+     *    camera (device 1) may be impossible for some stream configurations due
+     *    to hardware limitations, but the "low-power" front camera option may
+     *    always be used as it has special dedicated hardware.
+     *
+     *   Configuration:
+     *
+     *   Camera Device 0 - resourceCost = 100
+     *                     conflicting_devices = empty
+     *   Camera Device 1 - resourceCost = 100
+     *                     conflicting_devices = { 2 }
+     *   Camera Device 2 - resourceCost = 0
+     *                     conflicting_devices = { 1 }
+     *   Result:
+     *
+     *   Based on the conflicting_devices fields, the camera service guarantees
+     *   that the following sets of open devices must never be allowed:
+     *   { 1, 2 }.
+     *
+     *   Based on the resourceCost fields, only the highest priority application
+     *   may attempt to open both device 0 and 1 at the same time. If a
+     *   higher-priority application is not using device 1 or 2, a low-priority
+     *   background application may open device 2 (but must be forced to
+     *   disconnect it if a higher-priority application subsequently opens
+     *   device 1 or 2).
+     */
+    uint32_t resourceCost;
+
+    /**
+     * An array of camera device IDs indicating other devices that cannot be
+     * simultaneously opened while this camera device is in use.
+     *
+     * This field is intended to be used to indicate that this camera device
+     * is a composite of several other camera devices, or otherwise has
+     * hardware dependencies that prohibit simultaneous usage. If there are no
+     * dependencies, an empty list may be returned to indicate this.
+     *
+     * The camera service must never simultaneously open any of the devices
+     * in this list while this camera device is open.
+     *
+     */
+    vec<string> conflictingDevices;
+
+};