Camera RAW12 format issure

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

Hi, Nvidia Team:
I am working on TOF camera staff on Xavier. The camera is 640*480 raw12 format. And v4l2 config to V4L2_PIX_FMT_SBGGR12.
I add those in camera_common.c

{
		MEDIA_BUS_FMT_SBGGR12_1X12,
		V4L2_COLORSPACE_SRGB,
		V4L2_PIX_FMT_SBGGR12,
},

But, when i use v4l2-ctl to capture the frames,i found the size is change to 6404802.They are not alige to 2 bytes,looks so weird.

The size should be 6804801.5, so how can i capture right size frame?

2

The size is correct. Please have a check TRM. Table 7.16 RAW Memory Formats

3

Hi, Shane:
Thanks for your help.
I still confused be the raw12 memory.As the TRM RAW Memory Formats chapter，when i use RAW12 it whill be transfer to raw12 like attachment picture. But it looks not match with the data which i captured.
1.raw.tar.gz (134 KB)

Screenshot from 2019-08-27 10-07-43.png
Screenshot from 2019-08-27 10-07-43.png781×423 87.8 KB

4

It looks like correct. The first pixel of the latest line is 99 33 and the LSB is 99 so it is 3399 than match the TRM.

5

Hi,Shane,
My frame data some byte are 0xffff,but as the TRM T_R16_I,the first bit should be 0. Here is what i am confused.
And i found in vi5_fromats.c the RAW12 is config to T_R16. There is no description of T_R16 is TRM, only T_R16_I. Is T_R16 high bit is 1?