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camera_module_callbacks 结构体参考文档
#include <
camera_common.h
>
供相机 HAL 模块使用的回调函数,用于告知框架相机子系统的更改。
版本信息(基于 camera_module_t.common.module_api_version):
每个回调仅由实现 HAL 模块 API 接口的指定版本或更高版本的 HAL 模块调用。
CAMERA_MODULE_API_VERSION_2_1:
camera_device_status_change()
CAMERA_MODULE_API_VERSION_2_4:
torch_mode_status_change()
定义位于文件
camera_common.h
的
594
行。
camera_device_status_change:
向框架的回调,用于指明特定相机设备的状态已更改。在模块加载时,框架会假定所有相机设备都处于 CAMERA_DEVICE_STATUS_PRESENT 状态。HAL 必须调用此方法,以便告知框架任何最初为 NOT_PRESENT 的设备。
为 CAMERA_MODULE_API_VERSION_2_1 添加了此回调。
camera_module_callbacks
:使用 set_callbacks 传递给模块的 camera_module_callbacks_t 实例。
camera_id:具有新状态的相机设备的 ID。
new_status:新状态代码,即 camera_device_status_t 枚举之一,或平台专用状态。
定义位于文件
camera_common.h
的
616
行。
torch_mode_status_change:
向框架发出回调,指示与特定相机设备关联的闪光灯元件的手电筒模式状态已更改。在模块加载时,如果通过 get_camera_info() 调用报告 android.flash.info.available 为 true,框架会假定手电筒模式处于 TORCH_MODE_STATUS_AVAILABLE_OFF 状态。
为 CAMERA_MODULE_API_VERSION_2_4 添加了此回调。
camera_module_callbacks
:使用 set_callbacks 传递给模块的 camera_module_callbacks_t 实例。
camera_id:闪光灯元件具有新手电筒模式状态的相机设备的 ID。
new_status:新状态代码,是 torch_mode_status_t 枚举之一。
定义位于文件
camera_common.h
的
639
行。
此结构体的文档是根据以下文件生成的:
本页面上的内容和代码示例受内容许可部分所述许可的限制。Java 和 OpenJDK 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-07-27。
[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["没有我需要的信息","missingTheInformationINeed","thumb-down"],["太复杂/步骤太多","tooComplicatedTooManySteps","thumb-down"],["内容需要更新","outOfDate","thumb-down"],["翻译问题","translationIssue","thumb-down"],["示例/代码问题","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC):2025-07-27。"],[],[],null,["# Android Hardware Abstraction Layer: camera_module_callbacks Struct Reference\n\ncamera_module_callbacks Struct Reference\n========================================\n\n[Data Fields](#pub-attribs) \ncamera_module_callbacks Struct Reference \n\n`\n#include \u003c\n`[camera_common.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)`\n\u003e\n`\n\n|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Data Fields ----------- ||\n| void(\\* | [camera_device_status_change](/reference/hal/structcamera__module__callbacks#a79f12aab43e5c0ca75b127718f3144cf) )(const struct [camera_module_callbacks](/reference/hal/structcamera__module__callbacks) \\*, int camera_id, int new_status) |\n| ||\n| void(\\* | [torch_mode_status_change](/reference/hal/structcamera__module__callbacks#a70479d8b007a3a6b441437a3e584b2af) )(const struct [camera_module_callbacks](/reference/hal/structcamera__module__callbacks) \\*, const char \\*camera_id, int new_status) |\n| ||\n\n\nDetailed Description\n--------------------\n\n\nCallback functions for the camera HAL module to use to inform the framework of changes to the camera subsystem.\n\n\nVersion information (based on camera_module_t.common.module_api_version):\n\n\nEach callback is called only by HAL modules implementing the indicated version or higher of the HAL module API interface.\n\n\nCAMERA_MODULE_API_VERSION_2_1:\n[camera_device_status_change()](/reference/hal/structcamera__module__callbacks#a79f12aab43e5c0ca75b127718f3144cf)\n\n\nCAMERA_MODULE_API_VERSION_2_4:\n[torch_mode_status_change()](/reference/hal/structcamera__module__callbacks#a70479d8b007a3a6b441437a3e584b2af)\n\n\nDefinition at line\n[594](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)\nof file\n[camera_common.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)\n.\n\nField Documentation\n-------------------\n\n\n|----------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| void(\\* camera_device_status_change)(const struct [camera_module_callbacks](/reference/hal/structcamera__module__callbacks) \\*, int camera_id, int new_status) |\n\n\ncamera_device_status_change:\n\n\nCallback 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.\n\n\nThis callback is added for CAMERA_MODULE_API_VERSION_2_1.\n\n\n[camera_module_callbacks](/reference/hal/structcamera__module__callbacks)\n: The instance of camera_module_callbacks_t passed to the module with set_callbacks.\n\n\ncamera_id: The ID of the camera device that has a new status.\n\n\nnew_status: The new status code, one of the camera_device_status_t enums, or a platform-specific status.\n\n\nDefinition at line\n[616](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)\nof file\n[camera_common.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)\n.\n\n|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| void(\\* torch_mode_status_change)(const struct [camera_module_callbacks](/reference/hal/structcamera__module__callbacks) \\*, const char \\*camera_id, int new_status) |\n\n\ntorch_mode_status_change:\n\n\nCallback 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.\n\n\nThis callback is added for CAMERA_MODULE_API_VERSION_2_4.\n\n\n[camera_module_callbacks](/reference/hal/structcamera__module__callbacks)\n: The instance of camera_module_callbacks_t passed to the module with set_callbacks.\n\n\ncamera_id: The ID of camera device whose flash unit has a new torch mode status.\n\n\nnew_status: The new status code, one of the torch_mode_status_t enums.\n\n\nDefinition at line\n[639](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)\nof file\n[camera_common.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)\n.\n\n*** ** * ** ***\n\nThe documentation for this struct was generated from the following file:\n\n- hardware/libhardware/include/hardware/ [camera_common.h](https://android.googlesource.com/platform/hardware/libhardware/+/master/include/hardware/camera_common.h)"]]