Camera: HIDLized camera HALs, first set
* Common camera definitions (camera.common/1.0)
* Basic status codes, shared types
* Provider 2.4 API (camera.provider/2.4), including vendor tag APIs
* Enumerate and acquire camera device instances
* Mostly equivalent to legacy camera module v2.4.
* Device 1.0 API (camera.device/1.0)
* Mostly equivalent to legacy camera HAL v1.0.
* Device 3.2 API (camera.device/3.2)
* Mostly equivalent to legacy camera HAL v3.2.
* Metadata 3.2 API (camera.metadata/3.2)
* Definitions for valid metadata fields for device 3.2
Only the key initial interfaces are added; default implementations are
in a later CL. Other interfaces that will likely need to be added:
* Other provider minor versions
* Other device 3.x minor versions
Test: make -j32
Bug: 30985004
Bug: 32991603
Change-Id: I1c6a9a269bf45276055707bbc58cfc50d29fa919
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;
+
+};
diff --git a/camera/common/README.md b/camera/common/README.md
new file mode 100644
index 0000000..c177ad8
--- /dev/null
+++ b/camera/common/README.md
@@ -0,0 +1,21 @@
+## Camera common HAL definitions ##
+---
+
+## Overview: ##
+
+The camera.common namesapce is used by the Android camera HALs for common
+enumeration and structure definitions.
+
+This includes standard status codes returned by most camera HAL methods.
+
+More complete information about the Android camera HAL and subsystem can be found at
+[source.android.com](http://source.android.com/devices/camera/index.html).
+
+## Version history: ##
+
+## types.hal: ##
+
+### @1.0:
+
+Common enum and struct definitions for all camera HAL interfaces. Does not
+define any interfaces of its own.