[DESCRIPTION]
[KEYWORD]
JPEG File
[SOLUTION]
#define exif_tag_ExposureTime 0x829a /* R, Exposure time */

#define exif_tag_ExposureProgram 0x8822 /* S, Exposure Program */

#define exif_tag_ISOSpeedRatings 0x8827 /* S, ISO speed ratings */

#define exif_tag_ExposureBiasValue 0x9204 /* SR, Exposure bias */

#define exif_tag_MeteringMode 0x9207 /* S, Metering mode */

#define exif_tag_LightSource 0x9208 /* S, Light source */

#define exif_tag_Flash 0x9209 /* S, Flash */

#define exif_tag_PixelXDimension 0xa002 /* L, Valid image width */

#define exif_tag_PixelYDimension 0xa003 /* L, Valid image height */

#define exif_tag_DigitalZoomRatio 0xa404 /* R, Digital zoom ratio */

#define exif_tag_SceneCaptureType 0xa406 /* S, Scene capture type */

如果是RAW DATA sensor，38平台会调用Aaa_ae_v2.c中的exif_update_cam_para_struct()函数来写exif信息，如果是

YUV sensor，38平台会调用camera_yuv_process_v2.c中定义的exif_update_yuv_cam_para_struct()函数来写exif信息

。前者的exif信息来自于BB的ISP，后者的exif信息来自于sensor的ISP。

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