[TDA4] How to use custom layer at vision_apps?

Hi Ted,

1. "Required system library libtidl_custom.a" is simply telling that it needs this library for linking. The linker will throw error if its NOT finding the required library. So if you don't get any errors after printing this line your library linking is successful.

2. You are on the right path, but you might need some debug to root-cause the issue. As you are building for host-emulation please use CCS to debug the executable. This will tell you where and why exactly the crash occurred.

Also when you say "crash" do you see a "segmentation fault" ?

Regards,
Shyam

Hi Ted,

Can you please also confirm that you have initialized this call-back function pointer and ensured that your function signature matches the one below?

/* defined in itidl_ti.h*/

typedef struct {

...

  /** Call back Function pointer to Custom Layer Process API */
  int32_t (*TIDL_CustomLayerProcess)(sTIDL_Layer_t *tidlLayer,
                                     void *inPtrs[],
                                     void *outPtrs[],
                                     void *params,
                                     void *udmaDrvObj,
                                     int32_t tensorStats);
}
TIDL_CreateParams;

And make sure you initialize the function pointer in setCreateParams function in app_tidl/main.c file

        if (VX_SUCCESS == status)
        {
            if(createParams_buffer)
            {
                TIDL_CreateParams *prms = createParams_buffer;

                TIDL_createParamsInit(prms);

                prms->isInbufsPaded                 = 1;
                prms->quantRangeExpansionFactor     = 1.0;
                prms->quantRangeUpdateFactor        = 0.0;
#ifdef APP_TIDL_TRACE_DUMP
                prms->traceLogLevel                 = 1;
                prms->traceWriteLevel               = 1;
#else
                prms->traceLogLevel                 = 0;
                prms->traceWriteLevel               = 0;
#endif
                /* Initialize callback function pointer here */
                /* prms->TIDL_CustomLayerProcess = <custom layer function> */
            }
            else
            {
                printf("app_tidl: ERROR: Unable to allocate memory for create time params! %d bytes\n", capacity);
            }

            vxUnmapUserDataObject(createParams, map_id);
        }
    }

Regards,
Shyam