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camera flash light.md

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ANDROID_FLASH_INFO_AVAILABLE

  determine whether to support flash

  /system/media/camera/include/system/camera_metadata_tags.h

687 // ANDROID_FLASH_INFO_AVAILABLE
688 typedef enum camera_metadata_enum_android_flash_info_available {
689     ANDROID_FLASH_INFO_AVAILABLE_FALSE                              , // HIDL v3.2
690     ANDROID_FLASH_INFO_AVAILABLE_TRUE                               , // HIDL v3.2
691 } camera_metadata_enum_android_flash_info_available_t;
692

ANDROID_FLASH_MODE

  determine flash mode :

enum name enum value meaning
off 0 no flash light
single or called auto 1 auto flash light
torch or called always 1 always flash light

  /system/media/camera/include/system/camera_metadata_tags.h

670 // ANDROID_FLASH_MODE
671 typedef enum camera_metadata_enum_android_flash_mode {
672     ANDROID_FLASH_MODE_OFF                                          , // HIDL v3.2
673     ANDROID_FLASH_MODE_SINGLE                                       , // HIDL v3.2
674     ANDROID_FLASH_MODE_TORCH                                        , // HIDL v3.2
675 } camera_metadata_enum_android_flash_mode_t;

KEY_SUPPORTED_FLASH_MODES : flash-mode-values

  flash-mode-values

  adb shell dumpsys media.camera

	flash-mode: off
	flash-mode-values: off,auto,on,torch
enum name meaning
off camera doesn't apply flash
auto camera auto apply flash
on camera always apply flash
torch use as flashlight application