From 2c901ee1ad90beb7de6f23a2a81a707f7c030c67 Mon Sep 17 00:00:00 2001 From: Christian Hoffmann Date: Sat, 10 Feb 2024 10:11:38 +0100 Subject: [PATCH] hidl: camera: Add camera common helper * Thus allowing device-specific mods in camera_common.h Change-Id: I3bc89819440f1221fd5a03549971039797a7973e --- hidl/camera/default/Android.bp | 43 + hidl/camera/default/CameraMetadata.cpp | 1 + hidl/camera/default/CameraModule.cpp | 1 + hidl/camera/default/CameraParameters.cpp | 1 + hidl/camera/default/Exif.cpp | 1 + hidl/camera/default/HandleImporter.cpp | 1 + hidl/camera/default/SimpleThread.cpp | 1 + hidl/camera/default/VendorTagDescriptor.cpp | 1 + hidl/camera/default/include | 1 + hidl/camera/device/3.2/default/Android.bp | 2 +- hidl/camera/device/3.3/default/Android.bp | 2 +- hidl/camera/device/3.4/default/Android.bp | 2 +- hidl/camera/device/3.5/default/Android.bp | 2 +- .../include/hardware/camera.h | 1 + .../include/hardware/camera3.h | 2 +- .../include/hardware/camera_common.h | 1217 +++++++++++++++++ hidl/camera/provider/2.4/Android.bp | 3 +- hidl/camera/provider/2.5/Android.bp | 8 +- 18 files changed, 1281 insertions(+), 9 deletions(-) create mode 100644 hidl/camera/default/Android.bp create mode 120000 hidl/camera/default/CameraMetadata.cpp create mode 120000 hidl/camera/default/CameraModule.cpp create mode 120000 hidl/camera/default/CameraParameters.cpp create mode 120000 hidl/camera/default/Exif.cpp create mode 120000 hidl/camera/default/HandleImporter.cpp create mode 120000 hidl/camera/default/SimpleThread.cpp create mode 120000 hidl/camera/default/VendorTagDescriptor.cpp create mode 120000 hidl/camera/default/include create mode 120000 hidl/camera/libhardware_headers/include/hardware/camera.h create mode 100644 hidl/camera/libhardware_headers/include/hardware/camera_common.h diff --git a/hidl/camera/default/Android.bp b/hidl/camera/default/Android.bp new file mode 100644 index 0000000..6d7dcdd --- /dev/null +++ b/hidl/camera/default/Android.bp @@ -0,0 +1,43 @@ +cc_library_static { + name: "android.hardware.camera.common-helper.samsung", + vendor_available: true, + defaults: [ + "hidl_defaults", + "samsung_camera3_defaults", + ], + srcs: [ + "CameraModule.cpp", + "CameraMetadata.cpp", + "CameraParameters.cpp", + "VendorTagDescriptor.cpp", + "HandleImporter.cpp", + "Exif.cpp", + "SimpleThread.cpp", + ], + cflags: [ + "-Werror", + "-Wextra", + "-Wall", + ], + shared_libs: [ + "liblog", + "libgralloctypes", + "libhardware", + "libcamera_metadata", + "android.hardware.graphics.mapper@2.0", + "android.hardware.graphics.mapper@3.0", + "android.hardware.graphics.mapper@4.0", + "libexif", + ], + include_dirs: ["system/media/private/camera/include"], + header_libs: ["libhardware_headers.camera3_samsung"], + export_include_dirs: ["include"], +} + +// NOTE: Deprecated module kept for compatibility reasons. +// Depend on "android.hardware.camera.common-helper.samsung" instead +cc_library_static { + name: "android.hardware.camera.common@1.0-helper.samsung", + vendor_available: true, + whole_static_libs: ["android.hardware.camera.common-helper.samsung"], +} diff --git a/hidl/camera/default/CameraMetadata.cpp b/hidl/camera/default/CameraMetadata.cpp new file mode 120000 index 0000000..5ff770d --- /dev/null +++ b/hidl/camera/default/CameraMetadata.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/CameraMetadata.cpp \ No newline at end of file diff --git a/hidl/camera/default/CameraModule.cpp b/hidl/camera/default/CameraModule.cpp new file mode 120000 index 0000000..e8619d6 --- /dev/null +++ b/hidl/camera/default/CameraModule.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/CameraModule.cpp \ No newline at end of file diff --git a/hidl/camera/default/CameraParameters.cpp b/hidl/camera/default/CameraParameters.cpp new file mode 120000 index 0000000..d133144 --- /dev/null +++ b/hidl/camera/default/CameraParameters.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/CameraParameters.cpp \ No newline at end of file diff --git a/hidl/camera/default/Exif.cpp b/hidl/camera/default/Exif.cpp new file mode 120000 index 0000000..fac44c9 --- /dev/null +++ b/hidl/camera/default/Exif.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/Exif.cpp \ No newline at end of file diff --git a/hidl/camera/default/HandleImporter.cpp b/hidl/camera/default/HandleImporter.cpp new file mode 120000 index 0000000..290640d --- /dev/null +++ b/hidl/camera/default/HandleImporter.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/HandleImporter.cpp \ No newline at end of file diff --git a/hidl/camera/default/SimpleThread.cpp b/hidl/camera/default/SimpleThread.cpp new file mode 120000 index 0000000..cf05a54 --- /dev/null +++ b/hidl/camera/default/SimpleThread.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/SimpleThread.cpp \ No newline at end of file diff --git a/hidl/camera/default/VendorTagDescriptor.cpp b/hidl/camera/default/VendorTagDescriptor.cpp new file mode 120000 index 0000000..d078e83 --- /dev/null +++ b/hidl/camera/default/VendorTagDescriptor.cpp @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/VendorTagDescriptor.cpp \ No newline at end of file diff --git a/hidl/camera/default/include b/hidl/camera/default/include new file mode 120000 index 0000000..9d90818 --- /dev/null +++ b/hidl/camera/default/include @@ -0,0 +1 @@ +../../../../../hardware/interfaces/camera/common/default/include/ \ No newline at end of file diff --git a/hidl/camera/device/3.2/default/Android.bp b/hidl/camera/device/3.2/default/Android.bp index 4657928..14488dd 100644 --- a/hidl/camera/device/3.2/default/Android.bp +++ b/hidl/camera/device/3.2/default/Android.bp @@ -26,7 +26,7 @@ cc_library_shared { "libfmq", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: ["libhardware_headers.camera3_samsung"], export_include_dirs: ["."], diff --git a/hidl/camera/device/3.3/default/Android.bp b/hidl/camera/device/3.3/default/Android.bp index 130164e..f63f1e5 100644 --- a/hidl/camera/device/3.3/default/Android.bp +++ b/hidl/camera/device/3.3/default/Android.bp @@ -28,7 +28,7 @@ cc_library_shared { "libfmq", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: ["libhardware_headers.camera3_samsung"], export_include_dirs: ["."], diff --git a/hidl/camera/device/3.4/default/Android.bp b/hidl/camera/device/3.4/default/Android.bp index 4c12545..3941536 100644 --- a/hidl/camera/device/3.4/default/Android.bp +++ b/hidl/camera/device/3.4/default/Android.bp @@ -47,7 +47,7 @@ cc_library_shared { "libfmq", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: ["libhardware_headers.camera3_samsung"], local_include_dirs: ["include/device_v3_4_impl"], diff --git a/hidl/camera/device/3.5/default/Android.bp b/hidl/camera/device/3.5/default/Android.bp index 088252a..120f995 100644 --- a/hidl/camera/device/3.5/default/Android.bp +++ b/hidl/camera/device/3.5/default/Android.bp @@ -47,7 +47,7 @@ cc_library_shared { "libcamera_metadata", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: ["libhardware_headers.camera3_samsung"], local_include_dirs: ["include/device_v3_5_impl"], diff --git a/hidl/camera/libhardware_headers/include/hardware/camera.h b/hidl/camera/libhardware_headers/include/hardware/camera.h new file mode 120000 index 0000000..c4c3155 --- /dev/null +++ b/hidl/camera/libhardware_headers/include/hardware/camera.h @@ -0,0 +1 @@ +../../../../../../../hardware/libhardware/include/hardware/camera.h \ No newline at end of file diff --git a/hidl/camera/libhardware_headers/include/hardware/camera3.h b/hidl/camera/libhardware_headers/include/hardware/camera3.h index 45a576f..ec192de 100644 --- a/hidl/camera/libhardware_headers/include/hardware/camera3.h +++ b/hidl/camera/libhardware_headers/include/hardware/camera3.h @@ -18,7 +18,7 @@ #define ANDROID_INCLUDE_CAMERA3_H #include -#include +#include "camera_common.h" /** * Camera device HAL 3.6[ CAMERA_DEVICE_API_VERSION_3_6 ] diff --git a/hidl/camera/libhardware_headers/include/hardware/camera_common.h b/hidl/camera/libhardware_headers/include/hardware/camera_common.h new file mode 100644 index 0000000..16b4498 --- /dev/null +++ b/hidl/camera/libhardware_headers/include/hardware/camera_common.h @@ -0,0 +1,1217 @@ +/* + * Copyright (C) 2012 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. + */ + +// FIXME: add well-defined names for cameras + +#ifndef ANDROID_INCLUDE_CAMERA_COMMON_H +#define ANDROID_INCLUDE_CAMERA_COMMON_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +__BEGIN_DECLS + +/** + * The id of this module + */ +#define CAMERA_HARDWARE_MODULE_ID "camera" + +/** + * Module versioning information for the Camera hardware module, based on + * camera_module_t.common.module_api_version. The two most significant hex + * digits represent the major version, and the two least significant represent + * the minor version. + * + ******************************************************************************* + * Versions: 0.X - 1.X [CAMERA_MODULE_API_VERSION_1_0] + * + * Camera modules that report these version numbers implement the initial + * camera module HAL interface. All camera devices openable through this + * module support only version 1 of the camera device HAL. The device_version + * and static_camera_characteristics fields of camera_info are not valid. Only + * the android.hardware.Camera API can be supported by this module and its + * devices. + * + ******************************************************************************* + * Version: 2.0 [CAMERA_MODULE_API_VERSION_2_0] + * + * Camera modules that report this version number implement the second version + * of the camera module HAL interface. Camera devices openable through this + * module may support either version 1.0 or version 2.0 of the camera device + * HAL interface. The device_version field of camera_info is always valid; the + * static_camera_characteristics field of camera_info is valid if the + * device_version field is 2.0 or higher. + * + ******************************************************************************* + * Version: 2.1 [CAMERA_MODULE_API_VERSION_2_1] + * + * This camera module version adds support for asynchronous callbacks to the + * framework from the camera HAL module, which is used to notify the framework + * about changes to the camera module state. Modules that provide a valid + * set_callbacks() method must report at least this version number. + * + ******************************************************************************* + * Version: 2.2 [CAMERA_MODULE_API_VERSION_2_2] + * + * This camera module version adds vendor tag support from the module, and + * deprecates the old vendor_tag_query_ops that were previously only + * accessible with a device open. + * + ******************************************************************************* + * Version: 2.3 [CAMERA_MODULE_API_VERSION_2_3] + * + * This camera module version adds open legacy camera HAL device support. + * Framework can use it to open the camera device as lower device HAL version + * HAL device if the same device can support multiple device API versions. + * The standard hardware module open call (common.methods->open) continues + * to open the camera device with the latest supported version, which is + * also the version listed in camera_info_t.device_version. + * + ******************************************************************************* + * Version: 2.4 [CAMERA_MODULE_API_VERSION_2_4] + * + * This camera module version adds below API changes: + * + * 1. Torch mode support. The framework can use it to turn on torch mode for + * any camera device that has a flash unit, without opening a camera device. The + * camera device has a higher priority accessing the flash unit than the camera + * module; opening a camera device will turn off the torch if it had been enabled + * through the module interface. When there are any resource conflicts, such as + * open() is called to open a camera device, the camera HAL module must notify the + * framework through the torch mode status callback that the torch mode has been + * turned off. + * + * 2. External camera (e.g. USB hot-plug camera) support. The API updates specify that + * the camera static info is only available when camera is connected and ready to + * use for external hot-plug cameras. Calls to get static info will be invalid + * calls when camera status is not CAMERA_DEVICE_STATUS_PRESENT. The frameworks + * will only count on device status change callbacks to manage the available external + * camera list. + * + * 3. Camera arbitration hints. This module version adds support for explicitly + * indicating the number of camera devices that can be simultaneously opened and used. + * To specify valid combinations of devices, the resource_cost and conflicting_devices + * fields should always be set in the camera_info structure returned by the + * get_camera_info call. + * + * 4. Module initialization method. This will be called by the camera service + * right after the HAL module is loaded, to allow for one-time initialization + * of the HAL. It is called before any other module methods are invoked. + * + ******************************************************************************* + * Version: 2.5 [CAMERA_MODULE_API_VERSION_2_5] + * + * This camera module version adds below API changes: + * + * 1. Support to query characteristics of a non-standalone physical camera, which can + * only be accessed as part of a logical camera. It also adds camera stream combination + * query. + * + * 2. Ability to query whether a particular camera stream combination is + * supported by the camera device. + * + * 3. Device state change notification. This module version also supports + * notification about the overall device state change, such as + * folding/unfolding, or covering/uncovering of shutter. + */ + +/** + * Predefined macros for currently-defined version numbers + */ + +/** + * All module versions <= HARDWARE_MODULE_API_VERSION(1, 0xFF) must be treated + * as CAMERA_MODULE_API_VERSION_1_0 + */ +#define CAMERA_MODULE_API_VERSION_1_0 HARDWARE_MODULE_API_VERSION(1, 0) +#define CAMERA_MODULE_API_VERSION_2_0 HARDWARE_MODULE_API_VERSION(2, 0) +#define CAMERA_MODULE_API_VERSION_2_1 HARDWARE_MODULE_API_VERSION(2, 1) +#define CAMERA_MODULE_API_VERSION_2_2 HARDWARE_MODULE_API_VERSION(2, 2) +#define CAMERA_MODULE_API_VERSION_2_3 HARDWARE_MODULE_API_VERSION(2, 3) +#define CAMERA_MODULE_API_VERSION_2_4 HARDWARE_MODULE_API_VERSION(2, 4) +#define CAMERA_MODULE_API_VERSION_2_5 HARDWARE_MODULE_API_VERSION(2, 5) + +#define CAMERA_MODULE_API_VERSION_CURRENT CAMERA_MODULE_API_VERSION_2_5 + +/** + * All device versions <= HARDWARE_DEVICE_API_VERSION(1, 0xFF) must be treated + * as CAMERA_DEVICE_API_VERSION_1_0 + */ +#define CAMERA_DEVICE_API_VERSION_1_0 HARDWARE_DEVICE_API_VERSION(1, 0) // DEPRECATED +#define CAMERA_DEVICE_API_VERSION_2_0 HARDWARE_DEVICE_API_VERSION(2, 0) // NO LONGER SUPPORTED +#define CAMERA_DEVICE_API_VERSION_2_1 HARDWARE_DEVICE_API_VERSION(2, 1) // NO LONGER SUPPORTED +#define CAMERA_DEVICE_API_VERSION_3_0 HARDWARE_DEVICE_API_VERSION(3, 0) // NO LONGER SUPPORTED +#define CAMERA_DEVICE_API_VERSION_3_1 HARDWARE_DEVICE_API_VERSION(3, 1) // NO LONGER SUPPORTED +#define CAMERA_DEVICE_API_VERSION_3_2 HARDWARE_DEVICE_API_VERSION(3, 2) +#define CAMERA_DEVICE_API_VERSION_3_3 HARDWARE_DEVICE_API_VERSION(3, 3) +#define CAMERA_DEVICE_API_VERSION_3_4 HARDWARE_DEVICE_API_VERSION(3, 4) +#define CAMERA_DEVICE_API_VERSION_3_5 HARDWARE_DEVICE_API_VERSION(3, 5) +#define CAMERA_DEVICE_API_VERSION_3_6 HARDWARE_DEVICE_API_VERSION(3, 6) + +// Device version 3.5 is current, older HAL camera device versions are not +// recommended for new devices. +#define CAMERA_DEVICE_API_VERSION_CURRENT CAMERA_DEVICE_API_VERSION_3_5 + +/** + * Defined in /system/media/camera/include/system/camera_metadata.h + */ +typedef struct camera_metadata camera_metadata_t; + +typedef struct camera_info { + /** + * The direction that the camera faces to. See system/core/include/system/camera.h + * for camera facing definitions. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * It should be CAMERA_FACING_BACK or CAMERA_FACING_FRONT. + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * It should be CAMERA_FACING_BACK, CAMERA_FACING_FRONT or + * CAMERA_FACING_EXTERNAL. + */ + int facing; + + /** + * The orientation of the camera image. The value is the angle that the + * camera image needs to be rotated clockwise so it shows correctly on the + * display in its natural orientation. It should be 0, 90, 180, or 270. + * + * For example, suppose a device has a naturally tall screen. The + * back-facing camera sensor is mounted in landscape. You are looking at the + * screen. If the top side of the camera sensor is aligned with the right + * edge of the screen in natural orientation, the value should be 90. If the + * top side of a front-facing camera sensor is aligned with the right of the + * screen, the value should be 270. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * Valid in all camera_module versions. + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * Valid if camera facing is CAMERA_FACING_BACK or CAMERA_FACING_FRONT, + * not valid if camera facing is CAMERA_FACING_EXTERNAL. + */ + int orientation; + + /** + * The value of camera_device_t.common.version. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_0: + * + * Not valid. Can be assumed to be CAMERA_DEVICE_API_VERSION_1_0. Do + * not read this field. + * + * CAMERA_MODULE_API_VERSION_2_0 or higher: + * + * Always valid + * + */ + uint32_t device_version; + + /** + * The camera's fixed characteristics, which include all static camera metadata + * specified in system/media/camera/docs/docs.html. This should be a sorted metadata + * buffer, and may not be modified or freed by the caller. The pointer should remain + * valid for the lifetime of the camera module, and values in it may not + * change after it is returned by get_camera_info(). + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_0: + * + * Not valid. Extra characteristics are not available. Do not read this + * field. + * + * CAMERA_MODULE_API_VERSION_2_0 or higher: + * + * Valid if device_version >= CAMERA_DEVICE_API_VERSION_2_0. Do not read + * otherwise. + * + */ + const camera_metadata_t *static_camera_characteristics; + + /** + * 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 + * should fail during the configure calls. If the total resource cost is + * <= 100, open and configure should 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 will 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 will 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 - resource_cost = 51 + * conflicting_devices = null + * Camera Device 1 - resource_cost = 51 + * conflicting_devices = null + * + * Result: + * + * Since the sum of the resource costs is > 100, if a higher-priority + * application has either device open, no lower-priority applications will 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 will 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 - resource_cost = 50 + * conflicting_devices = { 2 } + * Camera Device 1 - resource_cost = 50 + * conflicting_devices = { 2 } + * Camera Device 2 - resource_cost = 100 + * conflicting_devices = { 0, 1 } + * Camera Device 3 - resource_cost = 50 + * conflicting_devices = null + * + * Result: + * + * Based on the conflicting_devices fields, the camera service guarantees that + * the following sets of open devices will never be allowed: { 1, 2 }, { 0, 2 }. + * + * Based on the resource_cost 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 - resource_cost = 100 + * conflicting_devices = null + * Camera Device 1 - resource_cost = 100 + * conflicting_devices = { 2 } + * Camera Device 2 - resource_cost = 0 + * conflicting_devices = { 1 } + * Result: + * + * Based on the conflicting_devices fields, the camera service guarantees that + * the following sets of open devices will never be allowed: { 1, 2 }. + * + * Based on the resource_cost 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 will be forced to disconnect it if a higher-priority + * application subsequently opens device 1 or 2). + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * Not valid. Can be assumed to be 100. Do not read this field. + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * Always valid. + */ + int resource_cost; + + /** + * An array of camera device IDs represented as NULL-terminated strings + * 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, a NULL may be returned in this field to indicate this. + * + * The camera service will never simultaneously open any of the devices + * in this list while this camera device is open. + * + * The strings pointed to in this field will not be cleaned up by the camera + * service, and must remain while this device is plugged in. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * Not valid. Can be assumed to be NULL. Do not read this field. + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * Always valid. + */ + char** conflicting_devices; + + /** + * The length of the array given in the conflicting_devices field. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * Not valid. Can be assumed to be 0. Do not read this field. + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * Always valid. + */ + size_t conflicting_devices_length; + +} camera_info_t; + +/** + * camera_device_status_t: + * + * The current status of the camera device, as provided by the HAL through the + * camera_module_callbacks.camera_device_status_change() call. + * + * At module load time, the framework will assume all camera devices are in the + * CAMERA_DEVICE_STATUS_PRESENT state. The HAL should invoke + * camera_module_callbacks::camera_device_status_change to inform the framework + * of any initially NOT_PRESENT devices. + * + * Allowed transitions: + * PRESENT -> NOT_PRESENT + * NOT_PRESENT -> ENUMERATING + * NOT_PRESENT -> PRESENT + * ENUMERATING -> PRESENT + * ENUMERATING -> NOT_PRESENT + */ +typedef enum camera_device_status { + /** + * The camera device is not currently connected, and opening it will return + * failure. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * Calls to get_camera_info must still succeed, and provide the same information + * it would if the camera were connected. + * + * CAMERA_MODULE_API_VERSION_2_4: + * + * The camera device at this status must return -EINVAL for get_camera_info call, + * as the device is not connected. + */ + CAMERA_DEVICE_STATUS_NOT_PRESENT = 0, + + /** + * The camera device is connected, and opening it will succeed. + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * The information returned by get_camera_info cannot change due to this status + * change. By default, the framework will assume all devices are in this state. + * + * CAMERA_MODULE_API_VERSION_2_4: + * + * The information returned by get_camera_info will become valid after a device's + * status changes to this. By default, the framework will assume all devices are in + * this state. + */ + CAMERA_DEVICE_STATUS_PRESENT = 1, + + /** + * The camera device is connected, but it is undergoing an enumeration and + * so opening the device will return -EBUSY. + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * Calls to get_camera_info must still succeed, as if the camera was in the + * PRESENT status. + * + * CAMERA_MODULE_API_VERSION_2_4: + * + * The camera device at this status must return -EINVAL for get_camera_info for call, + * as the device is not ready. + */ + CAMERA_DEVICE_STATUS_ENUMERATING = 2, + +} camera_device_status_t; + +/** + * torch_mode_status_t: + * + * The current status of the torch mode, as provided by the HAL through the + * camera_module_callbacks.torch_mode_status_change() call. + * + * The torch mode status of a camera device is applicable only when the camera + * device is present. The framework will not call set_torch_mode() to turn on + * torch mode of a camera device if the camera device is not present. At module + * load time, the framework will assume torch modes are in the + * TORCH_MODE_STATUS_AVAILABLE_OFF state if the camera device is present and + * android.flash.info.available is reported as true via get_camera_info() call. + * + * The behaviors of the camera HAL module that the framework expects in the + * following situations when a camera device's status changes: + * 1. A previously-disconnected camera device becomes connected. + * After camera_module_callbacks::camera_device_status_change() is invoked + * to inform the framework that the camera device is present, the framework + * will assume the camera device's torch mode is in + * TORCH_MODE_STATUS_AVAILABLE_OFF state. The camera HAL module does not need + * to invoke camera_module_callbacks::torch_mode_status_change() unless the + * flash unit is unavailable to use by set_torch_mode(). + * + * 2. A previously-connected camera becomes disconnected. + * After camera_module_callbacks::camera_device_status_change() is invoked + * to inform the framework that the camera device is not present, the + * framework will not call set_torch_mode() for the disconnected camera + * device until its flash unit becomes available again. The camera HAL + * module does not need to invoke + * camera_module_callbacks::torch_mode_status_change() separately to inform + * that the flash unit has become unavailable. + * + * 3. open() is called to open a camera device. + * The camera HAL module must invoke + * camera_module_callbacks::torch_mode_status_change() for all flash units + * that have entered TORCH_MODE_STATUS_NOT_AVAILABLE state and can not be + * turned on by calling set_torch_mode() anymore due to this open() call. + * open() must not trigger TORCH_MODE_STATUS_AVAILABLE_OFF before + * TORCH_MODE_STATUS_NOT_AVAILABLE for all flash units that have become + * unavailable. + * + * 4. close() is called to close a camera device. + * The camera HAL module must invoke + * camera_module_callbacks::torch_mode_status_change() for all flash units + * that have entered TORCH_MODE_STATUS_AVAILABLE_OFF state and can be turned + * on by calling set_torch_mode() again because of enough resources freed + * up by this close() call. + * + * Note that the framework calling set_torch_mode() successfully must trigger + * TORCH_MODE_STATUS_AVAILABLE_OFF or TORCH_MODE_STATUS_AVAILABLE_ON callback + * for the given camera device. Additionally it must trigger + * TORCH_MODE_STATUS_AVAILABLE_OFF callbacks for other previously-on torch + * modes if HAL cannot keep multiple torch modes on simultaneously. + */ +typedef enum torch_mode_status { + + /** + * The flash unit is no longer available and the torch mode can not be + * turned on by calling set_torch_mode(). If the torch mode is on, it + * will be turned off by HAL before HAL calls torch_mode_status_change(). + */ + TORCH_MODE_STATUS_NOT_AVAILABLE = 0, + + /** + * A torch mode has become off and available to be turned on via + * set_torch_mode(). This may happen in the following + * cases: + * 1. After the resources to turn on the torch mode have become available. + * 2. After set_torch_mode() is called to turn off the torch mode. + * 3. After the framework turned on the torch mode of some other camera + * device and HAL had to turn off the torch modes of any camera devices + * that were previously on. + */ + TORCH_MODE_STATUS_AVAILABLE_OFF = 1, + + /** + * A torch mode has become on and available to be turned off via + * set_torch_mode(). This can happen only after set_torch_mode() is called + * to turn on the torch mode. + */ + TORCH_MODE_STATUS_AVAILABLE_ON = 2, + +} torch_mode_status_t; + +/** + * Callback functions for the camera HAL module to use to inform the framework + * of changes to the camera subsystem. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * Each callback is called only by HAL modules implementing the indicated + * version or higher of the HAL module API interface. + * + * CAMERA_MODULE_API_VERSION_2_1: + * camera_device_status_change() + * + * CAMERA_MODULE_API_VERSION_2_4: + * torch_mode_status_change() + + */ +typedef struct camera_module_callbacks { + + /** + * camera_device_status_change: + * + * Callback to the framework to indicate that the state of a specific camera + * device has changed. At module load time, the framework will assume all + * camera devices are in the CAMERA_DEVICE_STATUS_PRESENT state. The HAL + * must call this method to inform the framework of any initially + * NOT_PRESENT devices. + * + * This callback is added for CAMERA_MODULE_API_VERSION_2_1. + * + * camera_module_callbacks: The instance of camera_module_callbacks_t passed + * to the module with set_callbacks. + * + * camera_id: The ID of the camera device that has a new status. + * + * new_status: The new status code, one of the camera_device_status_t enums, + * or a platform-specific status. + * + */ + void (*camera_device_status_change)(const struct camera_module_callbacks*, + int camera_id, + int new_status); + + /** + * torch_mode_status_change: + * + * Callback to the framework to indicate that the state of the torch mode + * of the flash unit associated with a specific camera device has changed. + * At module load time, the framework will assume the torch modes are in + * the TORCH_MODE_STATUS_AVAILABLE_OFF state if android.flash.info.available + * is reported as true via get_camera_info() call. + * + * This callback is added for CAMERA_MODULE_API_VERSION_2_4. + * + * camera_module_callbacks: The instance of camera_module_callbacks_t + * passed to the module with set_callbacks. + * + * camera_id: The ID of camera device whose flash unit has a new torch mode + * status. + * + * new_status: The new status code, one of the torch_mode_status_t enums. + */ + void (*torch_mode_status_change)(const struct camera_module_callbacks*, + const char* camera_id, + int new_status); + + +} camera_module_callbacks_t; + +/** + * camera_stream_t: + * + * A handle to a single camera input or output stream. A stream is defined by + * the framework by its buffer resolution and format and gralloc usage flags. + * + * The stream structures are owned by the framework and pointers to a + * camera_stream passed into the HAL by is_stream_combination_supported() are + * only valid within the scope of the call. + * + * All camera_stream members are immutable. + */ +typedef struct camera_stream { + /** + * The type of the stream, one of the camera3_stream_type_t values. + */ + int stream_type; + + /** + * The width in pixels of the buffers in this stream + */ + uint32_t width; + + /** + * The height in pixels of the buffers in this stream + */ + uint32_t height; + + /** + * The pixel format for the buffers in this stream. Format is a value from + * the HAL_PIXEL_FORMAT_* list in system/core/include/system/graphics.h, or + * from device-specific headers. + * + * If HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED is used, then the platform + * gralloc module will select a format based on the usage flags provided by + * the camera device and the other endpoint of the stream. + * + */ + int format; + + /** + * The gralloc usage flags for this stream, as needed by the HAL. The usage + * flags are defined in gralloc.h (GRALLOC_USAGE_*), or in device-specific + * headers. + * + * For output streams, these are the HAL's producer usage flags. For input + * streams, these are the HAL's consumer usage flags. The usage flags from + * the producer and the consumer will be combined together and then passed + * to the platform gralloc HAL module for allocating the gralloc buffers for + * each stream. + * + * The usage flag for an output stream may be bitwise + * combination of usage flags for multiple consumers, for the purpose of + * sharing one camera stream between those consumers. The HAL must fail + * the stream combination query call with -EINVAL if the combined flags cannot be + * supported due to imcompatible buffer format, dataSpace, or other hardware + * limitations. + */ + uint32_t usage; + + /** + * A field that describes the contents of the buffer. The format and buffer + * dimensions define the memory layout and structure of the stream buffers, + * while dataSpace defines the meaning of the data within the buffer. + * + * For most formats, dataSpace defines the color space of the image data. + * In addition, for some formats, dataSpace indicates whether image- or + * depth-based data is requested. See system/core/include/system/graphics.h + * for details of formats and valid dataSpace values for each format. + * + * Always set by the camera service. The dataspace values are set + * using the V0 dataspace definitions in graphics.h + */ + android_dataspace_t data_space; + + /** + * The required output rotation of the stream, one of + * the camera3_stream_rotation_t values. This must be inspected by HAL along + * with stream width and height. For example, if the rotation is 90 degree + * and the stream width and height is 720 and 1280 respectively, camera service + * will supply buffers of size 720x1280, and HAL should capture a 1280x720 image + * and rotate the image by 90 degree counterclockwise. The rotation field is + * no-op when the stream type is input. Camera HAL must ignore the rotation + * field for an input stream. + * + * Always set by camera service. HAL must inspect this field during stream + * combination query and return -EINVAL if it cannot perform such rotation. + * HAL must always support CAMERA3_STREAM_ROTATION_0, so a + * is_stream_combination_supported() call must not fail for unsupported rotation if + * rotation field of all streams is CAMERA3_STREAM_ROTATION_0. + * + */ + int rotation; + + /** + * The physical camera id this stream belongs to. + * Always set by camera service. If the camera device is not a logical + * multi camera, or if the camera is a logical multi camera but the stream + * is not a physical output stream, this field will point to a 0-length + * string. + * + * A logical multi camera is a camera device backed by multiple physical + * cameras that are also exposed to the application. And for a logical + * multi camera, a physical output stream is an output stream specifically + * requested on an underlying physical camera. + * + * For an input stream, this field is guaranteed to be a 0-length string. + */ + const char* physical_camera_id; + +} camera_stream_t; + +/** + * camera_stream_combination_t: + * + * A structure of stream definitions, used by is_stream_combination_supported(). This + * structure defines all the input & output streams for specific camera use case. + */ +typedef struct camera_stream_combination { + /** + * The total number of streams by the framework. This includes + * both input and output streams. The number of streams will be at least 1, + * and there will be at least one output-capable stream. + */ + uint32_t num_streams; + + /** + * An array of camera streams, defining the input/output + * stream combination for the camera HAL device. + * + * At most one input-capable stream may be defined. + * + * At least one output-capable stream must be defined. + */ + camera_stream_t *streams; + + /** + * The operation mode of streams in this stream combination, one of the value + * defined in camera3_stream_configuration_mode_t. + * + */ + uint32_t operation_mode; + +} camera_stream_combination_t; + +/** + * device_state_t: + * + * Possible physical states of the overall device, for use with + * notify_device_state_change. + */ +typedef enum device_state { + /** + * The device is in its normal physical configuration. This is the default if the + * device does not support multiple different states. + */ + NORMAL = 0, + + /** + * Camera device(s) facing backward are covered. + */ + BACK_COVERED = 1 << 0, + + /** + * Camera device(s) facing foward are covered. + */ + FRONT_COVERED = 1 << 1, + + /** + * The device is folded. If not set, the device is unfolded or does not + * support folding. + * + * The exact point when this status change happens during the folding + * operation is device-specific. + */ + FOLDED = 1 << 2, + + /** + * First vendor-specific device state. All bits above and including this one + * are for vendor state values. Values below this one must only be used + * for framework-defined states. + */ + VENDOR_STATE_START = 1LL << 32 + +} device_state_t; + +typedef struct camera_module { + /** + * Common methods of the camera module. This *must* be the first member of + * camera_module as users of this structure will cast a hw_module_t to + * camera_module pointer in contexts where it's known the hw_module_t + * references a camera_module. + * + * The return values for common.methods->open for camera_module are: + * + * 0: On a successful open of the camera device. + * + * -ENODEV: The camera device cannot be opened due to an internal + * error. + * + * -EINVAL: The input arguments are invalid, i.e. the id is invalid, + * and/or the module is invalid. + * + * -EBUSY: The camera device was already opened for this camera id + * (by using this method or open_legacy), + * regardless of the device HAL version it was opened as. + * + * -EUSERS: The maximal number of camera devices that can be + * opened concurrently were opened already, either by + * this method or the open_legacy method. + * + * All other return values from common.methods->open will be treated as + * -ENODEV. + */ + hw_module_t common; + + /** + * get_number_of_cameras: + * + * Returns the number of camera devices accessible through the camera + * module. The camera devices are numbered 0 through N-1, where N is the + * value returned by this call. The name of the camera device for open() is + * simply the number converted to a string. That is, "0" for camera ID 0, + * "1" for camera ID 1. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_3 or lower: + * + * The value here must be static, and cannot change after the first call + * to this method. + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * The value here must be static, and must count only built-in cameras, + * which have CAMERA_FACING_BACK or CAMERA_FACING_FRONT camera facing values + * (camera_info.facing). The HAL must not include the external cameras + * (camera_info.facing == CAMERA_FACING_EXTERNAL) into the return value + * of this call. Frameworks will use camera_device_status_change callback + * to manage number of external cameras. + */ + int (*get_number_of_cameras)(void); + /** + * get_camera_info: + * + * Return the static camera information for a given camera device. This + * information may not change for a camera device. + * + * Return values: + * + * 0: On a successful operation + * + * -ENODEV: The information cannot be provided due to an internal + * error. + * + * -EINVAL: The input arguments are invalid, i.e. the id is invalid, + * and/or the module is invalid. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_2_4 or higher: + * + * When a camera is disconnected, its camera id becomes invalid. Calling this + * this method with this invalid camera id will get -EINVAL and NULL camera + * static metadata (camera_info.static_camera_characteristics). + */ + int (*get_camera_info)(int camera_id, struct camera_info *info); + + /** + * set_callbacks: + * + * Provide callback function pointers to the HAL module to inform framework + * of asynchronous camera module events. The framework will call this + * function once after initial camera HAL module load, after the + * get_number_of_cameras() method is called for the first time, and before + * any other calls to the module. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_0, CAMERA_MODULE_API_VERSION_2_0: + * + * Not provided by HAL module. Framework may not call this function. + * + * CAMERA_MODULE_API_VERSION_2_1: + * + * Valid to be called by the framework. + * + * Return values: + * + * 0: On a successful operation + * + * -ENODEV: The operation cannot be completed due to an internal + * error. + * + * -EINVAL: The input arguments are invalid, i.e. the callbacks are + * null + */ + int (*set_callbacks)(const camera_module_callbacks_t *callbacks); + + /** + * get_vendor_tag_ops: + * + * Get methods to query for vendor extension metadata tag information. The + * HAL should fill in all the vendor tag operation methods, or leave ops + * unchanged if no vendor tags are defined. + * + * The vendor_tag_ops structure used here is defined in: + * system/media/camera/include/system/vendor_tags.h + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_x/2_0/2_1: + * Not provided by HAL module. Framework may not call this function. + * + * CAMERA_MODULE_API_VERSION_2_2: + * Valid to be called by the framework. + */ + void (*get_vendor_tag_ops)(vendor_tag_ops_t* ops); + + /** + * open_legacy: + * + * Open a specific legacy camera HAL device if multiple device HAL API + * versions are supported by this camera HAL module. For example, if the + * camera module supports both CAMERA_DEVICE_API_VERSION_1_0 and + * CAMERA_DEVICE_API_VERSION_3_2 device API for the same camera id, + * framework can call this function to open the camera device as + * CAMERA_DEVICE_API_VERSION_1_0 device. + * + * This is an optional method. A Camera HAL module does not need to support + * more than one device HAL version per device, and such modules may return + * -ENOSYS for all calls to this method. For all older HAL device API + * versions that are not supported, it may return -EOPNOTSUPP. When above + * cases occur, The normal open() method (common.methods->open) will be + * used by the framework instead. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_x/2_0/2_1/2_2: + * Not provided by HAL module. Framework will not call this function. + * + * CAMERA_MODULE_API_VERSION_2_3: + * Valid to be called by the framework. + * + * Return values: + * + * 0: On a successful open of the camera device. + * + * -ENOSYS This method is not supported. + * + * -EOPNOTSUPP: The requested HAL version is not supported by this method. + * + * -EINVAL: The input arguments are invalid, i.e. the id is invalid, + * and/or the module is invalid. + * + * -EBUSY: The camera device was already opened for this camera id + * (by using this method or common.methods->open method), + * regardless of the device HAL version it was opened as. + * + * -EUSERS: The maximal number of camera devices that can be + * opened concurrently were opened already, either by + * this method or common.methods->open method. + */ + int (*open_legacy)(const struct hw_module_t* module, const char* id, + uint32_t halVersion, struct hw_device_t** device); + + /** + * set_torch_mode: + * + * Turn on or off the torch mode of the flash unit associated with a given + * camera ID. If the operation is successful, HAL must notify the framework + * torch state by invoking + * camera_module_callbacks.torch_mode_status_change() with the new state. + * + * The camera device has a higher priority accessing the flash unit. When + * there are any resource conflicts, such as open() is called to open a + * camera device, HAL module must notify the framework through + * camera_module_callbacks.torch_mode_status_change() that the + * torch mode has been turned off and the torch mode state has become + * TORCH_MODE_STATUS_NOT_AVAILABLE. When resources to turn on torch mode + * become available again, HAL module must notify the framework through + * camera_module_callbacks.torch_mode_status_change() that the torch mode + * state has become TORCH_MODE_STATUS_AVAILABLE_OFF for set_torch_mode() to + * be called. + * + * When the framework calls set_torch_mode() to turn on the torch mode of a + * flash unit, if HAL cannot keep multiple torch modes on simultaneously, + * HAL should turn off the torch mode that was turned on by + * a previous set_torch_mode() call and notify the framework that the torch + * mode state of that flash unit has become TORCH_MODE_STATUS_AVAILABLE_OFF. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_x/2_0/2_1/2_2/2_3: + * Not provided by HAL module. Framework will not call this function. + * + * CAMERA_MODULE_API_VERSION_2_4: + * Valid to be called by the framework. + * + * Return values: + * + * 0: On a successful operation. + * + * -ENOSYS: The camera device does not support this operation. It is + * returned if and only if android.flash.info.available is + * false. + * + * -EBUSY: The camera device is already in use. + * + * -EUSERS: The resources needed to turn on the torch mode are not + * available, typically because other camera devices are + * holding the resources to make using the flash unit not + * possible. + * + * -EINVAL: camera_id is invalid. + * + */ + int (*set_torch_mode)(const char* camera_id, bool enabled); + + /** + * init: + * + * This method is called by the camera service before any other methods + * are invoked, right after the camera HAL library has been successfully + * loaded. It may be left as NULL by the HAL module, if no initialization + * in needed. + * + * It can be used by HAL implementations to perform initialization and + * other one-time operations. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_x/2_0/2_1/2_2/2_3: + * Not provided by HAL module. Framework will not call this function. + * + * CAMERA_MODULE_API_VERSION_2_4: + * If not NULL, will always be called by the framework once after the HAL + * module is loaded, before any other HAL module method is called. + * + * Return values: + * + * 0: On a successful operation. + * + * -ENODEV: Initialization cannot be completed due to an internal + * error. The HAL must be assumed to be in a nonfunctional + * state. + * + */ + int (*init)(); + + /** + * get_physical_camera_info: + * + * Return the static metadata for a physical camera as a part of a logical + * camera device. This function is only called for those physical camera + * ID(s) that are not exposed independently. In other words, camera_id will + * be greater or equal to the return value of get_number_of_cameras(). + * + * Return values: + * + * 0: On a successful operation + * + * -ENODEV: The information cannot be provided due to an internal + * error. + * + * -EINVAL: The input arguments are invalid, i.e. the id is invalid, + * and/or the module is invalid. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_x/2_0/2_1/2_2/2_3/2_4: + * Not provided by HAL module. Framework will not call this function. + * + * CAMERA_MODULE_API_VERSION_2_5 or higher: + * If any of the camera devices accessible through this camera module is + * a logical multi-camera, and at least one of the physical cameras isn't + * a stand-alone camera device, this function will be called by the camera + * framework. Calling this function with invalid physical_camera_id will + * get -EINVAL, and NULL static_metadata. + */ + int (*get_physical_camera_info)(int physical_camera_id, + camera_metadata_t **static_metadata); + + /** + * is_stream_combination_supported: + * + * Check for device support of specific camera stream combination. + * + * Return values: + * + * 0: In case the stream combination is supported. + * + * -EINVAL: In case the stream combination is not supported. + * + * -ENOSYS: In case stream combination query is not supported. + * + * Version information (based on camera_module_t.common.module_api_version): + * + * CAMERA_MODULE_API_VERSION_1_x/2_0/2_1/2_2/2_3/2_4: + * Not provided by HAL module. Framework will not call this function. + * + * CAMERA_MODULE_API_VERSION_2_5 or higher: + * Valid to be called by the framework. + */ + int (*is_stream_combination_supported)(int camera_id, + const camera_stream_combination_t *streams); + + /** + * notify_device_state_change: + * + * Notify the camera module that the state of the overall device has + * changed in some way that the HAL may want to know about. + * + * For example, a physical shutter may have been uncovered or covered, + * or a camera may have been covered or uncovered by an add-on keyboard + * or other accessory. + * + * The state is a bitfield of potential states, and some physical configurations + * could plausibly correspond to multiple different combinations of state bits. + * The HAL must ignore any state bits it is not actively using to determine + * the appropriate camera configuration. + * + * For example, on some devices the FOLDED state could mean that + * backward-facing cameras are covered by the fold, so FOLDED by itself implies + * BACK_COVERED. But other devices may support folding but not cover any cameras + * when folded, so for those FOLDED would not imply any of the other flags. + * Since these relationships are very device-specific, it is difficult to specify + * a comprehensive policy. But as a recommendation, it is suggested that if a flag + * necessarily implies other flags are set as well, then those flags should be set. + * So even though FOLDED would be enough to infer BACK_COVERED on some devices, the + * BACK_COVERED flag should also be set for clarity. + * + * This method may be invoked by the HAL client at any time. It must not + * cause any active camera device sessions to be closed, but may dynamically + * change which physical camera a logical multi-camera is using for its + * active and future output. + * + * The method must be invoked by the HAL client at least once before the + * client calls ICameraDevice::open on any camera device interfaces listed + * by this provider, to establish the initial device state. + * + * Note that the deviceState is 64-bit bitmask, with system defined states in + * lower 32-bit and vendor defined states in upper 32-bit. + */ + void (*notify_device_state_change)(uint64_t deviceState); + + /* reserved for future use */ + void* reserved[2]; +} camera_module_t; + +__END_DECLS + +#endif /* ANDROID_INCLUDE_CAMERA_COMMON_H */ diff --git a/hidl/camera/provider/2.4/Android.bp b/hidl/camera/provider/2.4/Android.bp index 32c5938..b938e32 100644 --- a/hidl/camera/provider/2.4/Android.bp +++ b/hidl/camera/provider/2.4/Android.bp @@ -29,11 +29,12 @@ cc_library_shared { "libutils", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: [ "camera.device@3.4-impl_headers", "camera.device@3.5-impl_headers", + "libhardware_headers.camera3_samsung" ], export_include_dirs: ["."], } diff --git a/hidl/camera/provider/2.5/Android.bp b/hidl/camera/provider/2.5/Android.bp index 0954578..dc70852 100644 --- a/hidl/camera/provider/2.5/Android.bp +++ b/hidl/camera/provider/2.5/Android.bp @@ -49,11 +49,12 @@ cc_library_shared { "libutils", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: [ "camera.device@3.4-impl_headers", "camera.device@3.5-impl_headers", + "libhardware_headers.camera3_samsung" ], export_include_dirs: ["."], } @@ -87,11 +88,12 @@ cc_defaults { "libutils", ], static_libs: [ - "android.hardware.camera.common@1.0-helper", + "android.hardware.camera.common@1.0-helper.samsung", ], header_libs: [ "camera.device@3.4-impl_headers", - "camera.device@3.5-impl_headers" + "camera.device@3.5-impl_headers", + "libhardware_headers.camera3_samsung" ], } -- 2.20.1