TDA4VM: How to convert YUV420(NV12) to BGR888?

HK Chu

Prodigy 210 points

Part Number: TDA4VM

Dear TI experts,

I want to convert YUV420(NV12) to BGR888(non-planar). I found two way to achieve this,

tivxDisplayM2MNode on DSS.
tivxImgPreProcNode on C6x.

The image in BGR format is the input to TIDL node, so I'm wondering if the method 2 is more appropriate?

I tried the format conversions TIADALG_COLOR_CONV_YUV420_BGR supported by tivxImgPreProcNode, and found that the format of the BGR image output by the node is planar(BBBGGGRRR), however, I need non-planar. Can I use this node to convert directly to non-planar format?

e_tiadalg_color_conv_type：

typedef enum
{
  TIADALG_COLOR_CONV_NONE                 = 0,
  TIADALG_COLOR_CONV_YUV420_RGB           = 1,
  TIADALG_COLOR_CONV_YUV420_BGR           = 2,
  TIADALG_COLOR_CONV_RGBINTERLEAVE_BGR    = 3,
  TIADALG_COLOR_CONV_RGBINTERLEAVE_RGB    = 4,
  TIADALG_COLOR_CONV_RGB_YUV420           = 5,
  TIADALG_COLOR_CONV_BGR_YUV420           = 6
}e_tiadalg_color_conv_type;

Thanks!

over 3 years ago

0 Brijesh Jadav over 3 years ago

TI__Guru**** 475715 points

Hi HK Chu,

HK Chu said:
The image in BGR format is the input to TIDL node, so I'm wondering if the method 2 is more appropriate?

Any specific reason for selecting option-2?

Option-1 uses HW module and so can free-up C6x from preprocessing..

Also option-1 can provide RGB interleaved output..

Regards,

Brijesh

0 HK Chu over 3 years ago in reply to Brijesh Jadav

Prodigy 210 points

Thanks for your reply!

tivxImgPreProcNodenode can be used to do color space conversion like YUV422 to YUV420 OR RGB888 to YUV420 and vice versa.

Does this node support BGR conversion? Can I use type FVID2_DF_BGR24_888 in pdk_jacinto_08_01_00_36/packages/ti/csl/csl_fvid2_dataTypes.h?

Regards.

0 Brijesh Jadav over 3 years ago in reply to HK Chu

TI__Guru**** 475715 points

Hi HK Chu,

Yes, This path can also support

- YUV422 to YUV420

- YUV422 to RGB

- RGB to YUV420

- RGB to YUV422

format conversion.

Regards,

Brijesh

0 HK Chu over 3 years ago in reply to Brijesh Jadav

Prodigy 210 points

Hi, Brijesh

I have tried option 1，the input image formate of tivxDisplayM2MNode is VX_DF_IMAGE_NV12，and output format is VX_DF_IMAGE_RGB，

I changed the FVID2_DF type of VX_DF_IMAGE_RGB,

tiovx/kernels_j7/hwa/display_m2m/vx_display_m2m_target.c

case (vx_df_image)VX_DF_IMAGE_RGB:
            format->dataFormat = FVID2_DF_BGR24_888;

Save the BGR image:

RGB file name /opt/vision_apps/test_data/img_rgb_0000.rgb
imgaddr_width = 3840
imgaddr_height = 2166
imgaddr_stride = 11520
width = 3840
height = 2166
Written 24952320 bytes

It looks like the format of the image is incorrect.

Is there any other code that needs to be changed?

Regards,

HK Chu

0 Brijesh Jadav over 3 years ago in reply to HK Chu

TI__Guru**** 475715 points

Hi HK Chu,

Which SDK release are you using?

Could you also please share the input and output image for checking out?

Regards,

Brijesh

0 HK Chu over 3 years ago in reply to Brijesh Jadav

Prodigy 210 points

Hi, Brijesh

I'm using SDK08_01_00_13.

input image: img_viss_0000.yuv(YUV420 NV12)

outout image: img_rgb_0000.rgb(BGR888)

The input image is captured by camera(3840*2166).

5556.image.rar

Regards,

HK Chu

0 HK Chu over 3 years ago in reply to Brijesh Jadav

Prodigy 210 points

Hello， Brijesh，

Is there any update on this issue? What's wrong with the the images I uploaded? You can open 5556.image.rar with 7-zip.

Looking forward to your reply, Thanks!

Regards,

HK Chu

0 Brijesh Jadav over 3 years ago in reply to HK Chu

TI__Guru**** 475715 points

Hi HK Chu,

Not yet, i have not still got the chance to look at it.

Regards,

Brijesh

0 Brijesh Jadav over 3 years ago in reply to Brijesh Jadav

TI__Guru**** 475715 points

Hi HK Chu,

How are you validating this input and output?

I tried it on PDK example, available in ti-processor-sdk-rtos-j721e-evm-08_02_00_05\pdk_jacinto_08_02_00_21\packages\ti\drv\dss\examples\dss_m2m_test\ folder, i could see the output correct. Please find attached input(NV12) and output(RGB888) images.

/cfs-file/__key/communityserver-discussions-components-files/791/5556.image.zip

Regards,

Brijesh

0 HK Chu over 3 years ago in reply to Brijesh Jadav

Prodigy 210 points

We solved this problem with M2M, thanks!

0 Brijesh Jadav over 3 years ago in reply to HK Chu

TI__Guru**** 475715 points

Thanks Closing this ticket.

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TDA4VM: How to convert YUV420(NV12) to BGR888?