Android 图像格式HAL_PIXEL_FORMAT_* vs ImageFormt.*对应关系

目录

一、常用HAL_PIXEL_FORMAT_*

二、ImageFormat与HAL Pixel Format对应关系

YUV：

RGB：

JPEG、DEPTH、RAW等：

Data Space

三、具体图像格式内存分布

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一、常用HAL_PIXEL_FORMAT_*

HAL_PIXEL_FORMAT_*是hal中用到的图像像素格式，对应app侧的ImageFormat.*。定义位置在system/core/include/system/下面的几个文件，最常用的几种格式定义在graphics-base-v1.0.h。如下：

typedef enum {
    HAL_PIXEL_FORMAT_RGBA_8888 = 1,
    HAL_PIXEL_FORMAT_RGBX_8888 = 2,
    HAL_PIXEL_FORMAT_RGB_888 = 3,
    HAL_PIXEL_FORMAT_RGB_565 = 4,
    HAL_PIXEL_FORMAT_BGRA_8888 = 5,
    HAL_PIXEL_FORMAT_YCBCR_422_SP = 16,
    HAL_PIXEL_FORMAT_YCRCB_420_SP = 17,
    HAL_PIXEL_FORMAT_YCBCR_422_I = 20,
    HAL_PIXEL_FORMAT_RGBA_FP16 = 22,
    HAL_PIXEL_FORMAT_RAW16 = 32,
    HAL_PIXEL_FORMAT_BLOB = 33,
    HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED = 34,
    HAL_PIXEL_FORMAT_YCBCR_420_888 = 35,
    HAL_PIXEL_FORMAT_RAW_OPAQUE = 36,
    HAL_PIXEL_FORMAT_RAW10 = 37,
    HAL_PIXEL_FORMAT_RAW12 = 38,
    HAL_PIXEL_FORMAT_RGBA_1010102 = 43,
    HAL_PIXEL_FORMAT_Y8 = 538982489,
    HAL_PIXEL_FORMAT_Y16 = 540422489,
    HAL_PIXEL_FORMAT_YV12 = 842094169,
} android_pixel_format_t;

如果遇到其他不常用的格式，搜下同目录下几个文件。

二、ImageFormat与HAL Pixel Format对应关系

对应关系如下：

YUV：

ImageFormat/PixelFormat	Value	HAL Pixel Format	Value
ImageFormat.YUV_420_888	35 (0x00000023)	HAL_PIXEL_FORMAT_YCBCR_420_888	35
ImageFormat.YV12	842094169 (0x32315659)	HAL_PIXEL_FORMAT_YV12	842094169
ImageFormat.NV21	17 (0x00000011)	HAL_PIXEL_FORMAT_YCRCB_420_SP	17
ImageFormat.NV16	16 (0x00000010)	HAL_PIXEL_FORMAT_YCBCR_422_SP	16
ImageFormat.YUY2	20 (0x00000014)	HAL_PIXEL_FORMAT_YCBCR_422_I	20
ImageFormat.Y8	538982489 (0x20203859)	HAL_PIXEL_FORMAT_Y8	538982489
ImageFormat.YCBCR_P010	54 (0x00000036)	HAL_PIXEL_FORMAT_YCBCR_P010	54

RGB：

ImageFormat/PixelFormat	Value	HAL Pixel Format	Value
PixelFormat.RGBA_8888	1 (0x00000001)	HAL_PIXEL_FORMAT_RGBA_8888	1
PixelFormat.RGBX_8888	2 (0x00000002)	HAL_PIXEL_FORMAT_RGBX_8888	2
PixelFormat.RGB_888	3 (0x00000003)	HAL_PIXEL_FORMAT_RGB_888	3
PixelFormat.RGB_565	4 (0x00000004)	HAL_PIXEL_FORMAT_RGB_565	4
Not Supported	NA	HAL_PIXEL_FORMAT_BGRA_8888	5
PixelFormat.RGBA_F16	22 (0x00000016)	HAL_PIXEL_FORMAT_RGBA_FP16	22
PixelFormat.RGBA_1010102	43 (0x0000002b)	HAL_PIXEL_FORMAT_RGBA_1010102	43

JPEG、DEPTH、RAW等：

ImageFormat/PixelFormat	Value	HAL Pixel Format	Value
ImageFormat.JPEG	256 (0x00000100)	HAL_PIXEL_FORMAT_BLOB	33
ImageFormat.DEPTH_POINT_CLOUD	257 (0x00000101)	HAL_PIXEL_FORMAT_BLOB	33
ImageFormat.DEPTH_JPEG	1768253795 (0x69656963)	HAL_PIXEL_FORMAT_BLOB	33
ImageFormat.HEIC	1212500294 (0x48454946)	HAL_PIXEL_FORMAT_BLOB	33
ImageFormat.DEPTH16	1144402265 (0x44363159)	HAL_PIXEL_FORMAT_Y16	540422489
ImageFormat.RAW_DEPTH	4098(0x1002)	HAL_PIXEL_FORMAT_RAW16	32
ImageFormat.RAW_SENSOR	32 (0x00000020)	HAL_PIXEL_FORMAT_RAW16	32
ImageFormat.RAW_PRIVATE	36 (0x00000024)	HAL_PIXEL_FORMAT_RAW_OPAQUE	36
ImageFormat.RAW10	37 (0x00000025)	HAL_PIXEL_FORMAT_RAW10	37
ImageFormat.RAW12	38 (0x00000026)	HAL_PIXEL_FORMAT_RAW12	38
ImageFormat.PRIVATE	34 (0x00000022)	HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED	34

Data Space

可以看出，同一个HAL pixel format可能对应几种image format，如何确定是哪种？用Data Space：

ImageFormat	Data Space	Stream Configuration Metadata
JPEG	HAL_DATASPACE_V0_JFIF	SCALER_AVAILABLE_STREAM_CONFIGURATIONS
DEPTH_POINT_CLOUD DEPTH16 RAW_DEPTH	HAL_DATASPACE_DEPTH	DEPTH_AVAILABLE_DEPTH _STREAM_CONFIGURATIONS
DEPTH_JPEG	HAL_DATASPACE_DYNAMIC_DEPTH	DEPTH_AVAILABLE_DYNAMIC _DEPTH_STREAM_CONFIGURATIONS
HEIC	HAL_DATASPACE_HEIF	HEIC_AVAILABLE_HEIC_STREAM_CONFIGURATIONS
Others	HAL_DATASPACE_UNKNOWN	SCALER_AVAILABLE_STREAM_CONFIGURATIONS

三、具体图像格式内存分布

优秀博客：Android中的图像格式_android_如浴春风_InfoQ写作社区

参考：

第9讲 StreamConfigurationMap详解一 - Android Camera2 API|极客笔记 (deepinout.com)