TDA4VM: how to transfer capture node data to csitx node?

HI TI:

from Process 1

side A use static RAW12 picture,side B can receive this picture

from Process 2
press S save csirx buffer to csirx image，then copy this image buffer to csitx buffer，side B can receive this image buffer.
but it efficiency  very low and speed slow.

from Process 3

we want to use zero buffer copy. set csirx node output as csitx node input and create csitx node
side A can run pipeline,side B can run pipeline.but side B can receive any csirx node picture. 

so we have two quesiton above.please help to check.

Hi Wu dunpeng,

wu dunpeng said:

press S save csirx buffer to csirx image，then copy this image buffer to csitx buffer，side B can receive this image buffer.
but it efficiency  very low and speed slow.

This is expected because of the memory copy, it would run slower.

wu dunpeng said:

we want to use zero buffer copy. set csirx node output as csitx node input and create csitx node
side A can run pipeline,side B can run pipeline.but side B can receive any csirx node picture. 

Do you mean CSIRX on the receiving in TDA4VM-B cannot receive frames? How do you connect CSIRX of TDAVM-A to CSITX? Can you please share this code? Also do you see any frames captured from CSIRX of TDA4VM -A ?

Regards,

Brijesh

HI TI:

no, i mean TDA4VM-B can receive frames from TDA4VM-A csitx, but it's wrong  it cann't see any image it's mussy. we use zero copy buffer from CSIRX to CSITX on TDA4VM-A. code like this:

vx_object_array csitx_in_arr;
csitx_in_arr = obj->captureObj.raw_image_arr[0];

/* CSITX Config initialization */
tivx_csitx_params_init(&csitxObj->csitx_params);
csitxObj->csitx_params.numInst = 1U;
csitxObj->csitx_params.numCh = NUM_CHANNELS;
csitxObj->csitx_params.instId[0U] = CSITX_INST_ID;
csitxObj->csitx_params.instCfg[0U].rxCompEnable = (uint32_t)vx_true_e;
csitxObj->csitx_params.instCfg[0U].rxv1p3MapEnable = (uint32_t)vx_true_e;
csitxObj->csitx_params.instCfg[0U].laneBandSpeed = CSITX_LANE_BAND_SPEED;
//csitxObj->csitx_config.instCfg[0U].laneSpeedMbps = CSITX_LANE_SPEED_MBPS;
csitxObj->csitx_params.instCfg[0U].numDataLanes = 4U;

for (loopCnt = 0U;
loopCnt < csitxObj->csitx_params.instCfg[0U].numDataLanes;
loopCnt++)
{
csitxObj->csitx_params.instCfg[0U].lanePolarityCtrl[loopCnt] = 0u;
}
for (loopCnt = 0U; loopCnt < NUM_CHANNELS; loopCnt++)
{
csitxObj->csitx_params.chVcNum[loopCnt] = loopCnt;
csitxObj->csitx_params.chInstMap[loopCnt] = CSITX_INST_ID;
}

csitxObj->csitx_params_obj = vxCreateUserDataObject(context, "tivx_csitx_params_t", sizeof(tivx_csitx_params_t), &csitxObj->csitx_params);
status = vxGetStatus((vx_reference)csitxObj->csitx_params_obj);

csitxObj->csitx_node = tivxCsitxNode(graph, csitxObj->csitx_params_obj, csitx_in_arr);
status = vxGetStatus((vx_reference)csitxObj->csitx_node);

the whole patch will attach.

i captured TDA4VM-A csirx_raw_oupt it's normal

Hi,

Instead of using csitx_in_arr, can you directly use obj->captureObj.raw_image_arr[0], while creating csitx node, like csitxObj->csitx_node = tivxCsitxNode(graph, csitxObj->csitx_params_obj, obj->captureObj.raw_image_arr[0]);?

Also is the capture output declared as a graph parameter? 

Regards,

Brijesh

HI TI:

  thanks for support. the problem solved. i still have some questions

1.can it use pipeline means?what's pipeline use for 

2.why can't use vxCreateObjectArray to create x_frame and then  set  obj->tx_frame = obj->captureObj.raw_image_arr[0]

thanks very much again

Hi Wu Dunpeng,

wu dunpeng said:

1.can it use pipeline means?what's pipeline use for 

Pipelining allows to run multiple runs in parallel. You could refer to below documentation for more information.

https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/latest/exports/docs/tiovx/docs/user_guide/TIOVX_PIPELINING.html.

wu dunpeng said:

2.why can't use vxCreateObjectArray to create x_frame and then  set  obj->tx_frame = obj->captureObj.raw_image_arr[0]

In the CSITX node, we need to use same instance of the object array, which is used as output of CSIRX. That's how the nodes are connected. If you create new instance of the object array, even from an image of CSIRX, it is a separate instance, so nodes will not be connected, and CSITX will not get the input from CSIRX..

Regards,

Brijesh