PROCESSOR-SDK-J784S4: how to change the node's input parameter while graph run

jialei zhang

Tool/software:

when I create a node which input type is vx_image, and output type is also vx_image, is there any API to change the input parameter to other vx_image object while I run grpah

for example:

vx_image inputImage1 = vxCreateImage(mContext,width,height,VX_DF_IMAGE_NV12);

vx_image inputImage2 = vxCreateImage(mContext,width,height,VX_DF_IMAGE_NV12);

fill inputImage1 and inputImage2 with different picture data;

mScaleNode = tivxVpacMscScaleNode(mGraph, inputImage, outputImage, NULL, NULL, NULL, NULL);

vxVerifyGraph(mGraph);

how can I change the inputImage1 to inputImage2 during after vxVerifyGraph(mGraph) ?

2 days ago

0 Nikhil Dasan 2 days ago

TI__Guru* 79026 points

Hi,

Are you looking to just change the contents with the same resolution? or is there change in the image resolution or format as well?

Regards,

Nikhil

0 jialei zhang 2 days ago in reply to Nikhil Dasan

Prodigy 30 points

just change the content, resolution and format is same

0 Nikhil Dasan 2 days ago in reply to jialei zhang

TI__Guru* 79026 points

Hi,

You can use tivxMapImagePatch() to get access to the pointer of the vx_image and fill/modify the values of the pixels and do vxProcessGraph() to submit the updated vx_image.

Regards,

Nikhil

0 jialei zhang 1 day ago in reply to Nikhil Dasan

Prodigy 30 points

this mean there have a memcpy between two vx_image object, this is not what I expected, because I need do this operation in a loop, it may cost much CPU resource, is there any API can change the input parameter directly?

can vxSetParameterByIndex(vx_node node, vx_uint32 index, vx_reference value) meet my requirement?

0 Nikhil Dasan 1 day ago in reply to jialei zhang

TI__Guru* 79026 points

Hi,

What I meant here is that you would be reading from the file directly to the pointer.

Something like the API "readScalerInput()" in vision_apps/modules/src/app_scaler_module.c

Can you check this and let me know if this is what you are looking for?

Regards,

Nikhil

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PROCESSOR-SDK-J784S4: how to change the node's input parameter while graph run