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include: android: Add Android headers from Cros

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Copy the Android Camera3 HAL headers from the ChromiumOS build system
and define a new inclusion directive in the meson build system for them.

The header files have been copied from:
https://chromium.googlesource.com/chromiumos/platform2
at revision 9e65ddd2c496e712f005ada9715decd2ff8e4a03
and provide:

1) Android CameraHAL3 HAL headers in include/android/hardware/
2) The Android system headers in include/android/system/
3) The Android camera metadata headers in include/android/metadata/

The original path in the Cros platform2/ repository is, respectively:
camera/android/header_files/include/hardware
camera/android/header_files/include/system
camera/android/libcamera_metadata/include/

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Jacopo Mondi 2019-05-10 17:12:45 +02:00
parent 3c658acf82
commit 206a22a6e9
17 changed files with 8925 additions and 0 deletions
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/*
* 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 <stdint.h>
#include <stdbool.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <cutils/native_handle.h>
#include <system/camera.h>
#include <system/camera_vendor_tags.h>
#include <hardware/hardware.h>
#include <hardware/gralloc.h>
__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.
*/
/**
* 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_CURRENT CAMERA_MODULE_API_VERSION_2_4
/**
* 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)
#define CAMERA_DEVICE_API_VERSION_2_0 HARDWARE_DEVICE_API_VERSION(2, 0)
#define CAMERA_DEVICE_API_VERSION_2_1 HARDWARE_DEVICE_API_VERSION(2, 1)
#define CAMERA_DEVICE_API_VERSION_3_0 HARDWARE_DEVICE_API_VERSION(3, 0)
#define CAMERA_DEVICE_API_VERSION_3_1 HARDWARE_DEVICE_API_VERSION(3, 1)
#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)
// Device version 3.3 is current, older HAL camera device versions are not
// recommended for new devices.
#define CAMERA_DEVICE_API_VERSION_CURRENT CAMERA_DEVICE_API_VERSION_3_3
/**
* 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;
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)();
/* reserved for future use */
void* reserved[5];
} camera_module_t;
__END_DECLS
#endif /* ANDROID_INCLUDE_CAMERA_COMMON_H */

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/*
* Copyright (C) 2008 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.
*/
#ifndef ANDROID_FB_INTERFACE_H
#define ANDROID_FB_INTERFACE_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <cutils/native_handle.h>
#include <hardware/hardware.h>
__BEGIN_DECLS
#define GRALLOC_HARDWARE_FB0 "fb0"
/*****************************************************************************/
/*****************************************************************************/
typedef struct framebuffer_device_t {
/**
* Common methods of the framebuffer device. This *must* be the first member of
* framebuffer_device_t as users of this structure will cast a hw_device_t to
* framebuffer_device_t pointer in contexts where it's known the hw_device_t references a
* framebuffer_device_t.
*/
struct hw_device_t common;
/* flags describing some attributes of the framebuffer */
const uint32_t flags;
/* dimensions of the framebuffer in pixels */
const uint32_t width;
const uint32_t height;
/* frambuffer stride in pixels */
const int stride;
/* framebuffer pixel format */
const int format;
/* resolution of the framebuffer's display panel in pixel per inch*/
const float xdpi;
const float ydpi;
/* framebuffer's display panel refresh rate in frames per second */
const float fps;
/* min swap interval supported by this framebuffer */
const int minSwapInterval;
/* max swap interval supported by this framebuffer */
const int maxSwapInterval;
/* Number of framebuffers supported*/
const int numFramebuffers;
int reserved[7];
/*
* requests a specific swap-interval (same definition than EGL)
*
* Returns 0 on success or -errno on error.
*/
int (*setSwapInterval)(struct framebuffer_device_t* window,
int interval);
/*
* This hook is OPTIONAL.
*
* It is non NULL If the framebuffer driver supports "update-on-demand"
* and the given rectangle is the area of the screen that gets
* updated during (*post)().
*
* This is useful on devices that are able to DMA only a portion of
* the screen to the display panel, upon demand -- as opposed to
* constantly refreshing the panel 60 times per second, for instance.
*
* Only the area defined by this rectangle is guaranteed to be valid, that
* is, the driver is not allowed to post anything outside of this
* rectangle.
*
* The rectangle evaluated during (*post)() and specifies which area
* of the buffer passed in (*post)() shall to be posted.
*
* return -EINVAL if width or height <=0, or if left or top < 0
*/
int (*setUpdateRect)(struct framebuffer_device_t* window,
int left, int top, int width, int height);
/*
* Post <buffer> to the display (display it on the screen)
* The buffer must have been allocated with the
* GRALLOC_USAGE_HW_FB usage flag.
* buffer must be the same width and height as the display and must NOT
* be locked.
*
* The buffer is shown during the next VSYNC.
*
* If the same buffer is posted again (possibly after some other buffer),
* post() will block until the the first post is completed.
*
* Internally, post() is expected to lock the buffer so that a
* subsequent call to gralloc_module_t::(*lock)() with USAGE_RENDER or
* USAGE_*_WRITE will block until it is safe; that is typically once this
* buffer is shown and another buffer has been posted.
*
* Returns 0 on success or -errno on error.
*/
int (*post)(struct framebuffer_device_t* dev, buffer_handle_t buffer);
/*
* The (*compositionComplete)() method must be called after the
* compositor has finished issuing GL commands for client buffers.
*/
int (*compositionComplete)(struct framebuffer_device_t* dev);
/*
* This hook is OPTIONAL.
*
* If non NULL it will be caused by SurfaceFlinger on dumpsys
*/
void (*dump)(struct framebuffer_device_t* dev, char *buff, int buff_len);
/*
* (*enableScreen)() is used to either blank (enable=0) or
* unblank (enable=1) the screen this framebuffer is attached to.
*
* Returns 0 on success or -errno on error.
*/
int (*enableScreen)(struct framebuffer_device_t* dev, int enable);
void* reserved_proc[6];
} framebuffer_device_t;
/** convenience API for opening and closing a supported device */
static inline int framebuffer_open(const struct hw_module_t* module,
struct framebuffer_device_t** device) {
return module->methods->open(module,
GRALLOC_HARDWARE_FB0, (struct hw_device_t**)device);
}
static inline int framebuffer_close(struct framebuffer_device_t* device) {
return device->common.close(&device->common);
}
__END_DECLS
#endif // ANDROID_FB_INTERFACE_H

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/*
* Copyright (C) 2008 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.
*/
#ifndef ANDROID_GRALLOC_INTERFACE_H
#define ANDROID_GRALLOC_INTERFACE_H
#include <system/window.h>
#include <system/graphics.h>
#include <hardware/hardware.h>
#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <cutils/native_handle.h>
#include <hardware/hardware.h>
#include <hardware/fb.h>
__BEGIN_DECLS
/**
* Module versioning information for the Gralloc hardware module, based on
* gralloc_module_t.common.module_api_version.
*
* Version History:
*
* GRALLOC_MODULE_API_VERSION_0_1:
* Initial Gralloc hardware module API.
*
* GRALLOC_MODULE_API_VERSION_0_2:
* Add support for flexible YCbCr format with (*lock_ycbcr)() method.
*
* GRALLOC_MODULE_API_VERSION_0_3:
* Add support for fence passing to/from lock/unlock.
*/
#define GRALLOC_MODULE_API_VERSION_0_1 HARDWARE_MODULE_API_VERSION(0, 1)
#define GRALLOC_MODULE_API_VERSION_0_2 HARDWARE_MODULE_API_VERSION(0, 2)
#define GRALLOC_MODULE_API_VERSION_0_3 HARDWARE_MODULE_API_VERSION(0, 3)
#define GRALLOC_DEVICE_API_VERSION_0_1 HARDWARE_DEVICE_API_VERSION(0, 1)
/**
* The id of this module
*/
#define GRALLOC_HARDWARE_MODULE_ID "gralloc"
/**
* Name of the graphics device to open
*/
#define GRALLOC_HARDWARE_GPU0 "gpu0"
enum {
/* buffer is never read in software */
GRALLOC_USAGE_SW_READ_NEVER = 0x00000000,
/* buffer is rarely read in software */
GRALLOC_USAGE_SW_READ_RARELY = 0x00000002,
/* buffer is often read in software */
GRALLOC_USAGE_SW_READ_OFTEN = 0x00000003,
/* mask for the software read values */
GRALLOC_USAGE_SW_READ_MASK = 0x0000000F,
/* buffer is never written in software */
GRALLOC_USAGE_SW_WRITE_NEVER = 0x00000000,
/* buffer is rarely written in software */
GRALLOC_USAGE_SW_WRITE_RARELY = 0x00000020,
/* buffer is often written in software */
GRALLOC_USAGE_SW_WRITE_OFTEN = 0x00000030,
/* mask for the software write values */
GRALLOC_USAGE_SW_WRITE_MASK = 0x000000F0,
/* buffer will be used as an OpenGL ES texture */
GRALLOC_USAGE_HW_TEXTURE = 0x00000100,
/* buffer will be used as an OpenGL ES render target */
GRALLOC_USAGE_HW_RENDER = 0x00000200,
/* buffer will be used by the 2D hardware blitter */
GRALLOC_USAGE_HW_2D = 0x00000400,
/* buffer will be used by the HWComposer HAL module */
GRALLOC_USAGE_HW_COMPOSER = 0x00000800,
/* buffer will be used with the framebuffer device */
GRALLOC_USAGE_HW_FB = 0x00001000,
/* buffer should be displayed full-screen on an external display when
* possible */
GRALLOC_USAGE_EXTERNAL_DISP = 0x00002000,
/* Must have a hardware-protected path to external display sink for
* this buffer. If a hardware-protected path is not available, then
* either don't composite only this buffer (preferred) to the
* external sink, or (less desirable) do not route the entire
* composition to the external sink. */
GRALLOC_USAGE_PROTECTED = 0x00004000,
/* buffer may be used as a cursor */
GRALLOC_USAGE_CURSOR = 0x00008000,
/* buffer will be used with the HW video encoder */
GRALLOC_USAGE_HW_VIDEO_ENCODER = 0x00010000,
/* buffer will be written by the HW camera pipeline */
GRALLOC_USAGE_HW_CAMERA_WRITE = 0x00020000,
/* buffer will be read by the HW camera pipeline */
GRALLOC_USAGE_HW_CAMERA_READ = 0x00040000,
/* buffer will be used as part of zero-shutter-lag queue */
GRALLOC_USAGE_HW_CAMERA_ZSL = 0x00060000,
/* mask for the camera access values */
GRALLOC_USAGE_HW_CAMERA_MASK = 0x00060000,
/* mask for the software usage bit-mask */
GRALLOC_USAGE_HW_MASK = 0x00071F00,
/* buffer will be used as a RenderScript Allocation */
GRALLOC_USAGE_RENDERSCRIPT = 0x00100000,
/* Set by the consumer to indicate to the producer that they may attach a
* buffer that they did not detach from the BufferQueue. Will be filtered
* out by GRALLOC_USAGE_ALLOC_MASK, so gralloc modules will not need to
* handle this flag. */
GRALLOC_USAGE_FOREIGN_BUFFERS = 0x00200000,
/* Mask of all flags which could be passed to a gralloc module for buffer
* allocation. Any flags not in this mask do not need to be handled by
* gralloc modules. */
GRALLOC_USAGE_ALLOC_MASK = ~(GRALLOC_USAGE_FOREIGN_BUFFERS),
/* implementation-specific private usage flags */
GRALLOC_USAGE_PRIVATE_0 = 0x10000000,
GRALLOC_USAGE_PRIVATE_1 = 0x20000000,
GRALLOC_USAGE_PRIVATE_2 = 0x40000000,
GRALLOC_USAGE_PRIVATE_3 = 0x80000000,
GRALLOC_USAGE_PRIVATE_MASK = 0xF0000000,
};
/*****************************************************************************/
/**
* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
* and the fields of this data structure must begin with hw_module_t
* followed by module specific information.
*/
typedef struct gralloc_module_t {
struct hw_module_t common;
/*
* (*registerBuffer)() must be called before a buffer_handle_t that has not
* been created with (*alloc_device_t::alloc)() can be used.
*
* This is intended to be used with buffer_handle_t's that have been
* received in this process through IPC.
*
* This function checks that the handle is indeed a valid one and prepares
* it for use with (*lock)() and (*unlock)().
*
* It is not necessary to call (*registerBuffer)() on a handle created
* with (*alloc_device_t::alloc)().
*
* returns an error if this buffer_handle_t is not valid.
*/
int (*registerBuffer)(struct gralloc_module_t const* module,
buffer_handle_t handle);
/*
* (*unregisterBuffer)() is called once this handle is no longer needed in
* this process. After this call, it is an error to call (*lock)(),
* (*unlock)(), or (*registerBuffer)().
*
* This function doesn't close or free the handle itself; this is done
* by other means, usually through libcutils's native_handle_close() and
* native_handle_free().
*
* It is an error to call (*unregisterBuffer)() on a buffer that wasn't
* explicitly registered first.
*/
int (*unregisterBuffer)(struct gralloc_module_t const* module,
buffer_handle_t handle);
/*
* The (*lock)() method is called before a buffer is accessed for the
* specified usage. This call may block, for instance if the h/w needs
* to finish rendering or if CPU caches need to be synchronized.
*
* The caller promises to modify only pixels in the area specified
* by (l,t,w,h).
*
* The content of the buffer outside of the specified area is NOT modified
* by this call.
*
* If usage specifies GRALLOC_USAGE_SW_*, vaddr is filled with the address
* of the buffer in virtual memory.
*
* Note calling (*lock)() on HAL_PIXEL_FORMAT_YCbCr_*_888 buffers will fail
* and return -EINVAL. These buffers must be locked with (*lock_ycbcr)()
* instead.
*
* THREADING CONSIDERATIONS:
*
* It is legal for several different threads to lock a buffer from
* read access, none of the threads are blocked.
*
* However, locking a buffer simultaneously for write or read/write is
* undefined, but:
* - shall not result in termination of the process
* - shall not block the caller
* It is acceptable to return an error or to leave the buffer's content
* into an indeterminate state.
*
* If the buffer was created with a usage mask incompatible with the
* requested usage flags here, -EINVAL is returned.
*
*/
int (*lock)(struct gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
void** vaddr);
/*
* The (*unlock)() method must be called after all changes to the buffer
* are completed.
*/
int (*unlock)(struct gralloc_module_t const* module,
buffer_handle_t handle);
/* reserved for future use */
int (*perform)(struct gralloc_module_t const* module,
int operation, ... );
/*
* The (*lock_ycbcr)() method is like the (*lock)() method, with the
* difference that it fills a struct ycbcr with a description of the buffer
* layout, and zeroes out the reserved fields.
*
* If the buffer format is not compatible with a flexible YUV format (e.g.
* the buffer layout cannot be represented with the ycbcr struct), it
* will return -EINVAL.
*
* This method must work on buffers with HAL_PIXEL_FORMAT_YCbCr_*_888
* if supported by the device, as well as with any other format that is
* requested by the multimedia codecs when they are configured with a
* flexible-YUV-compatible color-format with android native buffers.
*
* Note that this method may also be called on buffers of other formats,
* including non-YUV formats.
*
* Added in GRALLOC_MODULE_API_VERSION_0_2.
*/
int (*lock_ycbcr)(struct gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
struct android_ycbcr *ycbcr);
/*
* The (*lockAsync)() method is like the (*lock)() method except
* that the buffer's sync fence object is passed into the lock
* call instead of requiring the caller to wait for completion.
*
* The gralloc implementation takes ownership of the fenceFd and
* is responsible for closing it when no longer needed.
*
* Added in GRALLOC_MODULE_API_VERSION_0_3.
*/
int (*lockAsync)(struct gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
void** vaddr, int fenceFd);
/*
* The (*unlockAsync)() method is like the (*unlock)() method
* except that a buffer sync fence object is returned from the
* lock call, representing the completion of any pending work
* performed by the gralloc implementation.
*
* The caller takes ownership of the fenceFd and is responsible
* for closing it when no longer needed.
*
* Added in GRALLOC_MODULE_API_VERSION_0_3.
*/
int (*unlockAsync)(struct gralloc_module_t const* module,
buffer_handle_t handle, int* fenceFd);
/*
* The (*lockAsync_ycbcr)() method is like the (*lock_ycbcr)()
* method except that the buffer's sync fence object is passed
* into the lock call instead of requiring the caller to wait for
* completion.
*
* The gralloc implementation takes ownership of the fenceFd and
* is responsible for closing it when no longer needed.
*
* Added in GRALLOC_MODULE_API_VERSION_0_3.
*/
int (*lockAsync_ycbcr)(struct gralloc_module_t const* module,
buffer_handle_t handle, int usage,
int l, int t, int w, int h,
struct android_ycbcr *ycbcr, int fenceFd);
/* reserved for future use */
void* reserved_proc[3];
} gralloc_module_t;
/*****************************************************************************/
/**
* Every device data structure must begin with hw_device_t
* followed by module specific public methods and attributes.
*/
typedef struct alloc_device_t {
struct hw_device_t common;
/*
* (*alloc)() Allocates a buffer in graphic memory with the requested
* parameters and returns a buffer_handle_t and the stride in pixels to
* allow the implementation to satisfy hardware constraints on the width
* of a pixmap (eg: it may have to be multiple of 8 pixels).
* The CALLER TAKES OWNERSHIP of the buffer_handle_t.
*
* If format is HAL_PIXEL_FORMAT_YCbCr_420_888, the returned stride must be
* 0, since the actual strides are available from the android_ycbcr
* structure.
*
* Returns 0 on success or -errno on error.
*/
int (*alloc)(struct alloc_device_t* dev,
int w, int h, int format, int usage,
buffer_handle_t* handle, int* stride);
/*
* (*free)() Frees a previously allocated buffer.
* Behavior is undefined if the buffer is still mapped in any process,
* but shall not result in termination of the program or security breaches
* (allowing a process to get access to another process' buffers).
* THIS FUNCTION TAKES OWNERSHIP of the buffer_handle_t which becomes
* invalid after the call.
*
* Returns 0 on success or -errno on error.
*/
int (*free)(struct alloc_device_t* dev,
buffer_handle_t handle);
/* This hook is OPTIONAL.
*
* If non NULL it will be caused by SurfaceFlinger on dumpsys
*/
void (*dump)(struct alloc_device_t *dev, char *buff, int buff_len);
void* reserved_proc[7];
} alloc_device_t;
/** convenience API for opening and closing a supported device */
static inline int gralloc_open(const struct hw_module_t* module,
struct alloc_device_t** device) {
return module->methods->open(module,
GRALLOC_HARDWARE_GPU0, (struct hw_device_t**)device);
}
static inline int gralloc_close(struct alloc_device_t* device) {
return device->common.close(&device->common);
}
__END_DECLS
#endif // ANDROID_GRALLOC_INTERFACE_H

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include/android/hardware/libhardware/include/hardware/hardware.h Normal file
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/*
* Copyright (C) 2008 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.
*/
#ifndef ANDROID_INCLUDE_HARDWARE_HARDWARE_H
#define ANDROID_INCLUDE_HARDWARE_HARDWARE_H
#include <stdint.h>
#include <sys/cdefs.h>
#include <cutils/native_handle.h>
#include <system/graphics.h>
__BEGIN_DECLS
/*
* Value for the hw_module_t.tag field
*/
#define MAKE_TAG_CONSTANT(A,B,C,D) (((A) << 24) | ((B) << 16) | ((C) << 8) | (D))
#define HARDWARE_MODULE_TAG MAKE_TAG_CONSTANT('H', 'W', 'M', 'T')
#define HARDWARE_DEVICE_TAG MAKE_TAG_CONSTANT('H', 'W', 'D', 'T')
#define HARDWARE_MAKE_API_VERSION(maj,min) \
((((maj) & 0xff) << 8) | ((min) & 0xff))
#define HARDWARE_MAKE_API_VERSION_2(maj,min,hdr) \
((((maj) & 0xff) << 24) | (((min) & 0xff) << 16) | ((hdr) & 0xffff))
#define HARDWARE_API_VERSION_2_MAJ_MIN_MASK 0xffff0000
#define HARDWARE_API_VERSION_2_HEADER_MASK 0x0000ffff
/*
* The current HAL API version.
*
* All module implementations must set the hw_module_t.hal_api_version field
* to this value when declaring the module with HAL_MODULE_INFO_SYM.
*
* Note that previous implementations have always set this field to 0.
* Therefore, libhardware HAL API will always consider versions 0.0 and 1.0
* to be 100% binary compatible.
*
*/
#define HARDWARE_HAL_API_VERSION HARDWARE_MAKE_API_VERSION(1, 0)
/*
* Helper macros for module implementors.
*
* The derived modules should provide convenience macros for supported
* versions so that implementations can explicitly specify module/device
* versions at definition time.
*
* Use this macro to set the hw_module_t.module_api_version field.
*/
#define HARDWARE_MODULE_API_VERSION(maj,min) HARDWARE_MAKE_API_VERSION(maj,min)
#define HARDWARE_MODULE_API_VERSION_2(maj,min,hdr) HARDWARE_MAKE_API_VERSION_2(maj,min,hdr)
/*
* Use this macro to set the hw_device_t.version field
*/
#define HARDWARE_DEVICE_API_VERSION(maj,min) HARDWARE_MAKE_API_VERSION(maj,min)
#define HARDWARE_DEVICE_API_VERSION_2(maj,min,hdr) HARDWARE_MAKE_API_VERSION_2(maj,min,hdr)
struct hw_module_t;
struct hw_module_methods_t;
struct hw_device_t;
/**
* Every hardware module must have a data structure named HAL_MODULE_INFO_SYM
* and the fields of this data structure must begin with hw_module_t
* followed by module specific information.
*/
typedef struct hw_module_t {
/** tag must be initialized to HARDWARE_MODULE_TAG */
uint32_t tag;
/**
* The API version of the implemented module. The module owner is
* responsible for updating the version when a module interface has
* changed.
*
* The derived modules such as gralloc and audio own and manage this field.
* The module user must interpret the version field to decide whether or
* not to inter-operate with the supplied module implementation.
* For example, SurfaceFlinger is responsible for making sure that
* it knows how to manage different versions of the gralloc-module API,
* and AudioFlinger must know how to do the same for audio-module API.
*
* The module API version should include a major and a minor component.
* For example, version 1.0 could be represented as 0x0100. This format
* implies that versions 0x0100-0x01ff are all API-compatible.
*
* In the future, libhardware will expose a hw_get_module_version()
* (or equivalent) function that will take minimum/maximum supported
* versions as arguments and would be able to reject modules with
* versions outside of the supplied range.
*/
uint16_t module_api_version;
#define version_major module_api_version
/**
* version_major/version_minor defines are supplied here for temporary
* source code compatibility. They will be removed in the next version.
* ALL clients must convert to the new version format.
*/
/**
* The API version of the HAL module interface. This is meant to
* version the hw_module_t, hw_module_methods_t, and hw_device_t
* structures and definitions.
*
* The HAL interface owns this field. Module users/implementations
* must NOT rely on this value for version information.
*
* Presently, 0 is the only valid value.
*/
uint16_t hal_api_version;
#define version_minor hal_api_version
/** Identifier of module */
const char *id;
/** Name of this module */
const char *name;
/** Author/owner/implementor of the module */
const char *author;
/** Modules methods */
struct hw_module_methods_t* methods;
/** module's dso */
void* dso;
#ifdef __LP64__
uint64_t reserved[32-7];
#else
/** padding to 128 bytes, reserved for future use */
uint32_t reserved[32-7];
#endif
} hw_module_t;
typedef struct hw_module_methods_t {
/** Open a specific device */
int (*open)(const struct hw_module_t* module, const char* id,
struct hw_device_t** device);
} hw_module_methods_t;
/**
* Every device data structure must begin with hw_device_t
* followed by module specific public methods and attributes.
*/
typedef struct hw_device_t {
/** tag must be initialized to HARDWARE_DEVICE_TAG */
uint32_t tag;
/**
* Version of the module-specific device API. This value is used by
* the derived-module user to manage different device implementations.
*
* The module user is responsible for checking the module_api_version
* and device version fields to ensure that the user is capable of
* communicating with the specific module implementation.
*
* One module can support multiple devices with different versions. This
* can be useful when a device interface changes in an incompatible way
* but it is still necessary to support older implementations at the same
* time. One such example is the Camera 2.0 API.
*
* This field is interpreted by the module user and is ignored by the
* HAL interface itself.
*/
uint32_t version;
/** reference to the module this device belongs to */
struct hw_module_t* module;
/** padding reserved for future use */
#ifdef __LP64__
uint64_t reserved[12];
#else
uint32_t reserved[12];
#endif
/** Close this device */
int (*close)(struct hw_device_t* device);
} hw_device_t;
/**
* Name of the hal_module_info
*/
#define HAL_MODULE_INFO_SYM HMI
/**
* Name of the hal_module_info as a string
*/
#define HAL_MODULE_INFO_SYM_AS_STR "HMI"
/**
* Get the module info associated with a module by id.
*
* @return: 0 == success, <0 == error and *module == NULL
*/
int hw_get_module(const char *id, const struct hw_module_t **module);
/**
* Get the module info associated with a module instance by class 'class_id'
* and instance 'inst'.
*
* Some modules types necessitate multiple instances. For example audio supports
* multiple concurrent interfaces and thus 'audio' is the module class
* and 'primary' or 'a2dp' are module interfaces. This implies that the files
* providing these modules would be named audio.primary.<variant>.so and
* audio.a2dp.<variant>.so
*
* @return: 0 == success, <0 == error and *module == NULL
*/
int hw_get_module_by_class(const char *class_id, const char *inst,
const struct hw_module_t **module);
__END_DECLS
#endif /* ANDROID_INCLUDE_HARDWARE_HARDWARE_H */