How to add new parameters to deepstream_app_config_yoloV2_tiny.txt file ?

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

I want to add 4 new parameters to the deepstream_app_config_yoloV2_tiny.txt file under [ds-example] as follows (line 7 - 10) .

[ds-example]
enable=1
processing-width=1280
processing-height=720
full-frame=1
unique-id=15
x-coordinate-top=642
y-coordinate-top=10
x-coordinate-bottom=618
y-coordinate-bottom=720

And I want to access those values inside gstdsexample.cpp file gst_dsexample_transform_ip() function. I have customized the file as follows.

/**
 * Copyright (c) 2017-2019, NVIDIA CORPORATION.  All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <string.h>
#include <string>
#include <sstream>
#include <iostream>
#include <ostream>
#include <fstream>
#include "gstdsexample.h"
#include <npp.h>
#include <sys/time.h>
#include <typeindex>
#include <typeinfo>

GST_DEBUG_CATEGORY_STATIC (gst_dsexample_debug);
#define GST_CAT_DEFAULT gst_dsexample_debug
#define USE_EGLIMAGE 1

static GQuark _dsmeta_quark = 0;

/* Enum to identify properties */
enum
{
  PROP_0,
  PROP_UNIQUE_ID,
  PROP_PROCESSING_WIDTH,
  PROP_PROCESSING_HEIGHT,
  PROP_PROCESS_FULL_FRAME,
  PROP_GPU_DEVICE_ID,
  PROP_PROCESSING_TOPX,
  PROP_PROCESSING_TOPY,
  PROP_PROCESSING_BOTTOMX,
  PROP_PROCESSING_BOTTOMY
};

#define CHECK_NVDS_MEMORY_AND_GPUID(object, surface)  \
  ({ int _errtype=0;\
   do {  \
    if ((surface->memType == NVBUF_MEM_DEFAULT || surface->memType == NVBUF_MEM_CUDA_DEVICE) && \
        (surface->gpuId != object->gpu_id))  { \
    GST_ELEMENT_ERROR (object, RESOURCE, FAILED, \
        ("Input surface gpu-id doesnt match with configured gpu-id for element," \
         " please allocate input using unified memory, or use same gpu-ids"),\
        ("surface-gpu-id=%d,%s-gpu-id=%d",surface->gpuId,GST_ELEMENT_NAME(object),\
         object->gpu_id)); \
    _errtype = 1;\
    } \
    } while(0); \
    _errtype; \
  })

/* Default values for properties */
#define DEFAULT_UNIQUE_ID 15
#define DEFAULT_PROCESSING_WIDTH 660
#define DEFAULT_PROCESSING_HEIGHT 480
#define DEFAULT_PROCESS_FULL_FRAME TRUE
#define DEFAULT_GPU_ID 0
#define DEFAULT_PROCESSING_TOPX 640
#define DEFAULT_PROCESSING_TOPY 1
#define DEFAULT_PROCESSING_BOTTOMX 640
#define DEFAULT_PROCESSING_BOTTOMY 720

#define RGB_BYTES_PER_PIXEL 3
#define RGBA_BYTES_PER_PIXEL 4
#define Y_BYTES_PER_PIXEL 1
#define UV_BYTES_PER_PIXEL 2

#define MIN_INPUT_OBJECT_WIDTH 16
#define MIN_INPUT_OBJECT_HEIGHT 16

#define CHECK_NPP_STATUS(npp_status,error_str) do { \
  if ((npp_status) != NPP_SUCCESS) { \
    g_print ("Error: %s in %s at line %d: NPP Error %d\n", \
        error_str, __FILE__, __LINE__, npp_status); \
    goto error; \
  } \
} while (0)

#define CHECK_CUDA_STATUS(cuda_status,error_str) do { \
  if ((cuda_status) != cudaSuccess) { \
    g_print ("Error: %s in %s at line %d (%s)\n", \
        error_str, __FILE__, __LINE__, cudaGetErrorName(cuda_status)); \
    goto error; \
  } \
} while (0)

/* By default NVIDIA Hardware allocated memory flows through the pipeline. We
 * will be processing on this type of memory only. */
#define GST_CAPS_FEATURE_MEMORY_NVMM "memory:NVMM"
static GstStaticPadTemplate gst_dsexample_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
        (GST_CAPS_FEATURE_MEMORY_NVMM,
            "{ NV12, RGBA, I420 }")));

static GstStaticPadTemplate gst_dsexample_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE_WITH_FEATURES
        (GST_CAPS_FEATURE_MEMORY_NVMM,
            "{ NV12, RGBA, I420 }")));

/* Define our element type. Standard GObject/GStreamer boilerplate stuff */
#define gst_dsexample_parent_class parent_class
G_DEFINE_TYPE (GstDsExample, gst_dsexample, GST_TYPE_BASE_TRANSFORM);

static void gst_dsexample_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void gst_dsexample_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);

static gboolean gst_dsexample_set_caps (GstBaseTransform * btrans,
    GstCaps * incaps, GstCaps * outcaps);
static gboolean gst_dsexample_start (GstBaseTransform * btrans);
static gboolean gst_dsexample_stop (GstBaseTransform * btrans);

static GstFlowReturn gst_dsexample_transform_ip (GstBaseTransform *
    btrans, GstBuffer * inbuf);

static void
attach_metadata_full_frame (GstDsExample * dsexample, NvDsFrameMeta *frame_meta,
    gdouble scale_ratio, DsExampleOutput * output, guint batch_id);
static void attach_metadata_object (GstDsExample * dsexample,
    NvDsObjectMeta * obj_meta, DsExampleOutput * output);

/* Install properties, set sink and src pad capabilities, override the required
 * functions of the base class, These are common to all instances of the
 * element.
 */
static void
gst_dsexample_class_init (GstDsExampleClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
  GstBaseTransformClass *gstbasetransform_class;

  // Indicates we want to use DS buf api
  g_setenv ("DS_NEW_BUFAPI", "1", TRUE);

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
  gstbasetransform_class = (GstBaseTransformClass *) klass;

  /* Overide base class functions */
  gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_dsexample_set_property);
  gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_dsexample_get_property);

  gstbasetransform_class->set_caps = GST_DEBUG_FUNCPTR (gst_dsexample_set_caps);
  gstbasetransform_class->start = GST_DEBUG_FUNCPTR (gst_dsexample_start);
  gstbasetransform_class->stop = GST_DEBUG_FUNCPTR (gst_dsexample_stop);

  gstbasetransform_class->transform_ip =
      GST_DEBUG_FUNCPTR (gst_dsexample_transform_ip);

  /* Install properties */
  g_object_class_install_property (gobject_class, PROP_UNIQUE_ID,
      g_param_spec_uint ("unique-id",
          "Unique ID",
          "Unique ID for the element. Can be used to identify output of the"
          " element", 0, G_MAXUINT, DEFAULT_UNIQUE_ID, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_PROCESSING_WIDTH,
      g_param_spec_int ("processing-width",
          "Processing Width",
          "Width of the input buffer to algorithm",
          1, G_MAXINT, DEFAULT_PROCESSING_WIDTH, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_PROCESSING_HEIGHT,
      g_param_spec_int ("processing-height",
          "Processing Height",
          "Height of the input buffer to algorithm",
          1, G_MAXINT, DEFAULT_PROCESSING_HEIGHT, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_PROCESS_FULL_FRAME,
      g_param_spec_boolean ("full-frame",
          "Full frame",
          "Enable to process full frame or disable to process objects detected"
          "by primary detector", DEFAULT_PROCESS_FULL_FRAME, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_GPU_DEVICE_ID,
      g_param_spec_uint ("gpu-id",
          "Set GPU Device ID",
          "Set GPU Device ID", 0,
          G_MAXUINT, 0,
          GParamFlags
          (G_PARAM_READWRITE |
              G_PARAM_STATIC_STRINGS | GST_PARAM_MUTABLE_READY)));

  g_object_class_install_property (gobject_class, PROP_PROCESSING_TOPX,
      g_param_spec_int ("x-coordinate-top",
          "X Coordinate Top",
          "X coordinate of the top of the line",
          1, G_MAXINT, DEFAULT_PROCESSING_TOPX, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_PROCESSING_TOPY,
      g_param_spec_int ("y-coordinate-top",
          "Y Coordinate Top",
          "Y coordinate of the top of the line",
          1, G_MAXINT, DEFAULT_PROCESSING_TOPY, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_PROCESSING_BOTTOMX,
      g_param_spec_int ("x-coordinate-bottom",
          "X Coordinate Bottom",
          "X coordinate of the bottom of the line",
          1, G_MAXINT, DEFAULT_PROCESSING_BOTTOMX, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  g_object_class_install_property (gobject_class, PROP_PROCESSING_BOTTOMY,
      g_param_spec_int ("y-coordinate-bottom",
          "Y Coordinate Bottom",
          "Y coordinate of the bottom of the line",
          1, G_MAXINT, DEFAULT_PROCESSING_BOTTOMY, (GParamFlags)
          (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));

  /* Set sink and src pad capabilities */
  gst_element_class_add_pad_template (gstelement_class,
      gst_static_pad_template_get (&gst_dsexample_src_template));
  gst_element_class_add_pad_template (gstelement_class,
      gst_static_pad_template_get (&gst_dsexample_sink_template));

  /* Set metadata describing the element */
  gst_element_class_set_details_simple (gstelement_class,
      "DsExample plugin",
      "DsExample Plugin",
      "Process a 3rdparty example algorithm on objects / full frame",
      "NVIDIA Corporation. Post on Deepstream for Tesla forum for any queries "
      "@ https://devtalk.nvidia.com/default/board/209/");
}

static void
gst_dsexample_init (GstDsExample * dsexample)
{
  GstBaseTransform *btrans = GST_BASE_TRANSFORM (dsexample);

  /* We will not be generating a new buffer. Just adding / updating
   * metadata. */
  gst_base_transform_set_in_place (GST_BASE_TRANSFORM (btrans), TRUE);
  /* We do not want to change the input caps. Set to passthrough. transform_ip
   * is still called. */
  gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (btrans), TRUE);

  /* Initialize all property variables to default values */
  dsexample->unique_id = DEFAULT_UNIQUE_ID;
  dsexample->processing_width = DEFAULT_PROCESSING_WIDTH;
  dsexample->processing_height = DEFAULT_PROCESSING_HEIGHT;
  dsexample->process_full_frame = DEFAULT_PROCESS_FULL_FRAME;
  dsexample->gpu_id = DEFAULT_GPU_ID;
  dsexample->x_coordinate_top = DEFAULT_PROCESSING_TOPX;
  dsexample->y_coordinate_top = DEFAULT_PROCESSING_TOPY;
  dsexample->x_coordinate_bottom = DEFAULT_PROCESSING_BOTTOMX;
  dsexample->y_coordinate_bottom = DEFAULT_PROCESSING_BOTTOMY;
  /* This quark is required to identify NvDsMeta when iterating through
   * the buffer metadatas */
  if (!_dsmeta_quark)
    _dsmeta_quark = g_quark_from_static_string (NVDS_META_STRING);
}

/* Function called when a property of the element is set. Standard boilerplate.
 */
static void
gst_dsexample_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstDsExample *dsexample = GST_DSEXAMPLE (object);
  switch (prop_id) {
    case PROP_UNIQUE_ID:
      dsexample->unique_id = g_value_get_uint (value);
      break;
    case PROP_PROCESSING_WIDTH:
      dsexample->processing_width = g_value_get_int (value);
      break;
    case PROP_PROCESSING_HEIGHT:
      dsexample->processing_height = g_value_get_int (value);
      break;
    case PROP_PROCESS_FULL_FRAME:
      dsexample->process_full_frame = g_value_get_boolean (value);
      break;
    case PROP_GPU_DEVICE_ID:
      dsexample->gpu_id = g_value_get_uint (value);
      break;
    case PROP_PROCESSING_TOPX:
      dsexample->x_coordinate_top = g_value_get_int (value);
      break;
    case PROP_PROCESSING_TOPY:
      dsexample->y_coordinate_top = g_value_get_int (value);
      break;
    case PROP_PROCESSING_BOTTOMX:
      dsexample->x_coordinate_bottom = g_value_get_int (value);
      break;
    case PROP_PROCESSING_BOTTOMY:
      dsexample->y_coordinate_bottom = g_value_get_int (value);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

/* Function called when a property of the element is requested. Standard
 * boilerplate.
 */
static void
gst_dsexample_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  GstDsExample *dsexample = GST_DSEXAMPLE (object);

  switch (prop_id) {
    case PROP_UNIQUE_ID:
      g_value_set_uint (value, dsexample->unique_id);
      break;
    case PROP_PROCESSING_WIDTH:
      g_value_set_int (value, dsexample->processing_width);
      break;
    case PROP_PROCESSING_HEIGHT:
      g_value_set_int (value, dsexample->processing_height);
      break;
    case PROP_PROCESS_FULL_FRAME:
      g_value_set_boolean (value, dsexample->process_full_frame);
      break;
    case PROP_GPU_DEVICE_ID:
      g_value_set_uint (value, dsexample->gpu_id);
      break;
    case PROP_PROCESSING_TOPX:
      g_value_set_int (value, dsexample->x_coordinate_top);
      break;
    case PROP_PROCESSING_TOPY:
      g_value_set_int (value, dsexample->y_coordinate_top);
      break;
    case PROP_PROCESSING_BOTTOMX:
      g_value_set_int (value, dsexample->x_coordinate_bottom);
      break;
    case PROP_PROCESSING_BOTTOMY:
      g_value_set_int (value, dsexample->y_coordinate_bottom);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

/**
 * Initialize all resources and start the output thread
 */
static gboolean
gst_dsexample_start (GstBaseTransform * btrans)
{
  GstDsExample *dsexample = GST_DSEXAMPLE (btrans);
  NvBufSurfaceCreateParams create_params;
  DsExampleInitParams init_params =
      { dsexample->processing_width, dsexample->processing_height,
    dsexample->x_coordinate_top
  };

  GstQuery *queryparams = NULL;
  guint batch_size = 1;

  /* Algorithm specific initializations and resource allocation. */
  dsexample->dsexamplelib_ctx = DsExampleCtxInit (&init_params);

  GST_DEBUG_OBJECT (dsexample, "ctx lib %p \n", dsexample->dsexamplelib_ctx);

  CHECK_CUDA_STATUS (cudaSetDevice (dsexample->gpu_id),
      "Unable to set cuda device");

  dsexample->batch_size = 1;
  queryparams = gst_nvquery_batch_size_new ();
  if (gst_pad_peer_query (GST_BASE_TRANSFORM_SINK_PAD (btrans), queryparams)
      || gst_pad_peer_query (GST_BASE_TRANSFORM_SRC_PAD (btrans), queryparams)) {
    if (gst_nvquery_batch_size_parse (queryparams, &batch_size)) {
      dsexample->batch_size = batch_size;
    }
  }
  GST_DEBUG_OBJECT (dsexample, "Setting batch-size %d \n",
      dsexample->batch_size);
  gst_query_unref (queryparams);

  CHECK_CUDA_STATUS (cudaStreamCreate (&dsexample->cuda_stream),
      "Could not create cuda stream");

  if (dsexample->inter_buf)
    NvBufSurfaceDestroy (dsexample->inter_buf);
  dsexample->inter_buf = NULL;

  /* An intermediate buffer for NV12/RGBA to BGR conversion  will be
   * required. Can be skipped if custom algorithm can work directly on NV12/RGBA. */
  create_params.gpuId  = dsexample->gpu_id;
  create_params.width  = dsexample->processing_width;
  create_params.height = dsexample->processing_height;
  create_params.size = 0;
  create_params.colorFormat = NVBUF_COLOR_FORMAT_RGBA;
  create_params.layout = NVBUF_LAYOUT_PITCH;
#ifdef __aarch64__
  create_params.memType = NVBUF_MEM_DEFAULT;
#else
  create_params.memType = NVBUF_MEM_CUDA_UNIFIED;
#endif

  if (NvBufSurfaceCreate (&dsexample->inter_buf, 1,
          &create_params) != 0) {
    GST_ERROR ("Error: Could not allocate internal buffer for dsexample");
    goto error;
  }

  // Create host memory for storing converted/scaled interleaved RGB data
  CHECK_CUDA_STATUS (cudaMallocHost (&dsexample->host_rgb_buf,
          dsexample->processing_width * dsexample->processing_height *
          RGB_BYTES_PER_PIXEL), "Could not allocate cuda host buffer");

  GST_DEBUG_OBJECT (dsexample, "allocated cuda buffer %p \n",
      dsexample->host_rgb_buf);

  // CV Mat containing interleaved RGB data. This call does not allocate memory.
  // It uses host_rgb_buf as data.
  dsexample->cvmat =
      new cv::Mat (dsexample->processing_height, dsexample->processing_width,
      CV_8UC3, dsexample->host_rgb_buf,
      dsexample->processing_width * RGB_BYTES_PER_PIXEL);

  if (!dsexample->cvmat)
    goto error;

  GST_DEBUG_OBJECT (dsexample, "created CV Mat\n");

  return TRUE;
error:
  if (dsexample->host_rgb_buf) {
    cudaFreeHost (dsexample->host_rgb_buf);
    dsexample->host_rgb_buf = NULL;
  }

  if (dsexample->cuda_stream) {
    cudaStreamDestroy (dsexample->cuda_stream);
    dsexample->cuda_stream = NULL;
  }
  if (dsexample->dsexamplelib_ctx)
    DsExampleCtxDeinit (dsexample->dsexamplelib_ctx);
  return FALSE;
}

/**
 * Stop the output thread and free up all the resources
 */
static gboolean
gst_dsexample_stop (GstBaseTransform * btrans)
{
  GstDsExample *dsexample = GST_DSEXAMPLE (btrans);

  if (dsexample->inter_buf)
    NvBufSurfaceDestroy(dsexample->inter_buf);
  dsexample->inter_buf = NULL;

  if (dsexample->cuda_stream)
    cudaStreamDestroy (dsexample->cuda_stream);
  dsexample->cuda_stream = NULL;

  delete dsexample->cvmat;
  dsexample->cvmat = NULL;

  if (dsexample->host_rgb_buf) {
    cudaFreeHost (dsexample->host_rgb_buf);
    dsexample->host_rgb_buf = NULL;
  }

GST_DEBUG_OBJECT (dsexample, "deleted CV Mat \n");

  // Deinit the algorithm library
  DsExampleCtxDeinit (dsexample->dsexamplelib_ctx);
  dsexample->dsexamplelib_ctx = NULL;

  GST_DEBUG_OBJECT (dsexample, "ctx lib released \n");

  return TRUE;
}

/**
 * Called when source / sink pad capabilities have been negotiated.
 */
static gboolean
gst_dsexample_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
    GstCaps * outcaps)
{
  GstDsExample *dsexample = GST_DSEXAMPLE (btrans);
  /* Save the input video information, since this will be required later. */
  gst_video_info_from_caps (&dsexample->video_info, incaps);

  CHECK_CUDA_STATUS (cudaSetDevice (dsexample->gpu_id),
      "Unable to set cuda device");

return TRUE;

error:
  return FALSE;
}

/**
 * Scale the entire frame to the processing resolution maintaining aspect ratio.
 * Or crop and scale objects to the processing resolution maintaining the aspect
 * ratio. Remove the padding required by hardware and convert from RGBA to RGB
 * using openCV. These steps can be skipped if the algorithm can work with
 * padded data and/or can work with RGBA.
 */
static GstFlowReturn
get_converted_mat (GstDsExample * dsexample, NvBufSurface *input_buf, gint idx,
    NvOSD_RectParams * crop_rect_params, gdouble & ratio, gint input_width,
    gint input_height)
{
  NvBufSurfTransform_Error err;
  NvBufSurfTransformConfigParams transform_config_params;
  NvBufSurfTransformParams transform_params;
  NvBufSurfTransformRect src_rect;
  NvBufSurfTransformRect dst_rect;
  NvBufSurface ip_surf;
  cv::Mat in_mat;
  ip_surf = *input_buf;

  ip_surf.numFilled = ip_surf.batchSize = 1;
  ip_surf.surfaceList = &(input_buf->surfaceList[idx]);

  gint src_left = GST_ROUND_UP_2(crop_rect_params->left);
  gint src_top = GST_ROUND_UP_2(crop_rect_params->top);
  gint src_width = GST_ROUND_DOWN_2(crop_rect_params->width);
  gint src_height = GST_ROUND_DOWN_2(crop_rect_params->height);

  // Maintain aspect ratio
  double hdest = dsexample->processing_width * src_height / (double) src_width;
  double wdest = dsexample->processing_height * src_width / (double) src_height;
  guint dest_width, dest_height;

  if (hdest <= dsexample->processing_height) {
    dest_width = dsexample->processing_width;
    dest_height = hdest;
  } else {
    dest_width = wdest;
    dest_height = dsexample->processing_height;
  }

  // Configure transform session parameters for the transformation
  transform_config_params.compute_mode = NvBufSurfTransformCompute_Default;
  transform_config_params.gpu_id = dsexample->gpu_id;
  transform_config_params.cuda_stream = dsexample->cuda_stream;

  // Set the transform session parameters for the conversions executed in this
  // thread.
  err = NvBufSurfTransformSetSessionParams (&transform_config_params);
  if (err != NvBufSurfTransformError_Success) {
    GST_ELEMENT_ERROR (dsexample, STREAM, FAILED,
        ("NvBufSurfTransformSetSessionParams failed with error %d", err), (NULL));
    goto error;
  }

  // Calculate scaling ratio while maintaining aspect ratio
  ratio = MIN (1.0 * dest_width/ src_width, 1.0 * dest_height / src_height);

  if ((crop_rect_params->width == 0) || (crop_rect_params->height == 0)) {
    GST_ELEMENT_ERROR (dsexample, STREAM, FAILED,
        ("%s:crop_rect_params dimensions are zero",__func__), (NULL));
    goto error;
  }

#ifdef __aarch64__
  if (ratio <= 1.0 / 16 || ratio >= 16.0) {
    // Currently cannot scale by ratio > 16 or < 1/16 for Jetson
    goto error;
  }
#endif
  // Set the transform ROIs for source and destination
  src_rect = {(guint)src_top, (guint)src_left, (guint)src_width, (guint)src_height};
  dst_rect = {0, 0, (guint)dest_width, (guint)dest_height};

  // Set the transform parameters
  transform_params.src_rect = &src_rect;
  transform_params.dst_rect = &dst_rect;
  transform_params.transform_flag =
    NVBUFSURF_TRANSFORM_FILTER | NVBUFSURF_TRANSFORM_CROP_SRC |
      NVBUFSURF_TRANSFORM_CROP_DST;
  transform_params.transform_filter = NvBufSurfTransformInter_Default;

  //Memset the memory
  NvBufSurfaceMemSet (dsexample->inter_buf, 0, 0, 0);

  GST_DEBUG_OBJECT (dsexample, "Scaling and converting input buffer\n");

  // Transformation scaling+format conversion if any.
  err = NvBufSurfTransform (&ip_surf, dsexample->inter_buf, &transform_params);
  if (err != NvBufSurfTransformError_Success) {
    GST_ELEMENT_ERROR (dsexample, STREAM, FAILED,
        ("NvBufSurfTransform failed with error %d while converting buffer", err),
        (NULL));
    goto error;
  }
  // Map the buffer so that it can be accessed by CPU
  if (NvBufSurfaceMap (dsexample->inter_buf, 0, 0, NVBUF_MAP_READ) != 0){
    goto error;
  }

  // Cache the mapped data for CPU access
  NvBufSurfaceSyncForCpu (dsexample->inter_buf, 0, 0);

  // Use openCV to remove padding and convert RGBA to BGR. Can be skipped if
  // algorithm can handle padded RGBA data.
  in_mat =
      cv::Mat (dsexample->processing_height, dsexample->processing_width,
      CV_8UC4, dsexample->inter_buf->surfaceList[0].mappedAddr.addr[0],
      dsexample->inter_buf->surfaceList[0].pitch);

  cv::cvtColor (in_mat, *dsexample->cvmat, CV_RGBA2BGR);

  if (NvBufSurfaceUnMap (dsexample->inter_buf, 0, 0)){
    goto error;
  }

#ifdef __aarch64__
  // To use the converted buffer in CUDA, create an EGLImage and then use
  // CUDA-EGL interop APIs
  if (USE_EGLIMAGE) {
    if (NvBufSurfaceMapEglImage (dsexample->inter_buf, 0) !=0 ) {
      goto error;
    }

    // dsexample->inter_buf->surfaceList[0].mappedAddr.eglImage
    // Use interop APIs cuGraphicsEGLRegisterImage and
    // cuGraphicsResourceGetMappedEglFrame to access the buffer in CUDA

    // Destroy the EGLImage
    NvBufSurfaceUnMapEglImage (dsexample->inter_buf, 0);
  }
#endif

  /* We will first convert only the Region of Interest (the entire frame or the
   * object bounding box) to RGB and then scale the converted RGB frame to
   * processing resolution. */
  return GST_FLOW_OK;

error:
  return GST_FLOW_ERROR;
}

/**
 * Called when element recieves an input buffer from upstream element.
 */
static GstFlowReturn
gst_dsexample_transform_ip (GstBaseTransform * btrans, GstBuffer * inbuf)
{
  GstDsExample *dsexample = GST_DSEXAMPLE (btrans);
  GstMapInfo in_map_info;
  GstFlowReturn flow_ret = GST_FLOW_ERROR;
  gdouble scale_ratio = 1.0;
  DsExampleOutput *output;

  NvBufSurface *surface = NULL;
  NvDsBatchMeta *batch_meta = NULL;
  NvDsFrameMeta *frame_meta = NULL;
  NvDsMetaList * l_frame = NULL;
  guint i = 0;

  dsexample->frame_num++;
  CHECK_CUDA_STATUS (cudaSetDevice (dsexample->gpu_id),
      "Unable to set cuda device");

  memset (&in_map_info, 0, sizeof (in_map_info));
  if (!gst_buffer_map (inbuf, &in_map_info, GST_MAP_READ)) {
    g_print ("Error: Failed to map gst buffer\n");
    goto error;
  }

  surface = (NvBufSurface *) in_map_info.data;
  GST_DEBUG_OBJECT (dsexample,
      "Processing Frame %" G_GUINT64_FORMAT " Surface %p\n",
      dsexample->frame_num, surface);

  if (CHECK_NVDS_MEMORY_AND_GPUID (dsexample, surface))
    goto error;

  batch_meta = gst_buffer_get_nvds_batch_meta (inbuf);
  if (batch_meta == nullptr) {
    GST_ELEMENT_ERROR (dsexample, STREAM, FAILED,
        ("NvDsBatchMeta not found for input buffer."), (NULL));
    return GST_FLOW_ERROR;
  }

  if (dsexample->process_full_frame) {

    // Using object crops as input to the algorithm. The objects are detected by
    // the primary detector
    NvDsMetaList * l_obj = NULL;
    NvDsObjectMeta *obj_meta = NULL;

for (l_frame = batch_meta->frame_meta_list; l_frame != NULL;
      l_frame = l_frame->next)
    {
      frame_meta = (NvDsFrameMeta *) (l_frame->data);
      NvOSD_RectParams rect_params;

      // Scale the entire frame to processing resolution
      rect_params.left = 0;
      rect_params.top = 0;
      rect_params.width = dsexample->video_info.width;
      rect_params.height = dsexample->video_info.height;

      // Scale and convert the frame
      if (get_converted_mat (dsexample, surface, i, &rect_params,
            scale_ratio, dsexample->video_info.width,
            dsexample->video_info.height) != GST_FLOW_OK) {
        goto error;
      }

      // Process to get the output
      output =
          DsExampleProcess (dsexample->dsexamplelib_ctx,
          dsexample->cvmat->data);
      // Attach the metadata for the full frame
      //std::cout << "Full frame\n" << frame_meta << std::endl;

      attach_metadata_full_frame (dsexample, frame_meta, scale_ratio, output, i);
      i++;

      int person_count = 0;
      frame_meta = (NvDsFrameMeta *) (l_frame->data);
      for (l_obj = frame_meta->obj_meta_list; l_obj != NULL;
          l_obj = l_obj->next)
      {
        obj_meta = (NvDsObjectMeta *) (l_obj->data);

/* Should not process on objects smaller than MIN_INPUT_OBJECT_WIDTH x MIN_INPUT_OBJECT_HEIGHT
         * since it will cause hardware scaling issues. */
        if (obj_meta->rect_params.width < MIN_INPUT_OBJECT_WIDTH ||
            obj_meta->rect_params.height < MIN_INPUT_OBJECT_HEIGHT)
          continue;

        // Crop and scale the object
        if (get_converted_mat (dsexample,
              surface, frame_meta->batch_id, &obj_meta->rect_params,
              scale_ratio, dsexample->video_info.width,
              dsexample->video_info.height) != GST_FLOW_OK) {
          // Error in conversion, skip processing on object. */
          continue;
        }

        // Process the object crop to obtain label
        output = DsExampleProcess (dsexample->dsexamplelib_ctx,
            dsexample->cvmat->data);

// Attach labels for the object
	char *text=obj_meta->text_params.display_text;

	// Get the bounding box center matching point in line
	
	// Get the slope of the line
	float m = (dsexample->y_coordinate_bottom - dsexample->y_coordinate_top) / (dsexample->x_coordinate_bottom - dsexample->x_coordinate_top);

	//std::cout << dsexample->x_coordinate_top << std::endl; 

	if(strcmp(text,"person") == 0 and obj_meta->rect_params.left + obj_meta->rect_params.width >= 640) {
	    person_count = person_count + 1;
	}

	attach_metadata_object (dsexample, obj_meta, output);
        free (output);
      }
      if(person_count == 0)
      {
        std::cout << "No person" << std::endl;
	//std::string filename1 = "/home/uh5190/python_scripts/UDPsendno.py";
	//std::string command1 = "python ";
	//command1 += filename1;
	//system(command1.c_str());
      }
      else
      {
        
        std::cout << "Warning !!! Person detected" << std::endl;
	//std::string filename = "/home/uh5190/python_scripts/UDPsendyes.py";
	//std::string command = "python ";
	//command += filename;
	//system(command.c_str());
      }
    }
   
  } else {
    // Using object crops as input to the algorithm. The objects are detected by
    // the primary detector
    NvDsMetaList * l_obj = NULL;
    NvDsObjectMeta *obj_meta = NULL;
    
    for (l_frame = batch_meta->frame_meta_list; l_frame != NULL;
      l_frame = l_frame->next)
    {
      int person_count = 0;
      frame_meta = (NvDsFrameMeta *) (l_frame->data);
      for (l_obj = frame_meta->obj_meta_list; l_obj != NULL;
          l_obj = l_obj->next)
      {
        obj_meta = (NvDsObjectMeta *) (l_obj->data);

/* Should not process on objects smaller than MIN_INPUT_OBJECT_WIDTH x MIN_INPUT_OBJECT_HEIGHT
         * since it will cause hardware scaling issues. */
        if (obj_meta->rect_params.width < MIN_INPUT_OBJECT_WIDTH ||
            obj_meta->rect_params.height < MIN_INPUT_OBJECT_HEIGHT)
          continue;

        // Crop and scale the object
        if (get_converted_mat (dsexample,
              surface, frame_meta->batch_id, &obj_meta->rect_params,
              scale_ratio, dsexample->video_info.width,
              dsexample->video_info.height) != GST_FLOW_OK) {
          // Error in conversion, skip processing on object. */
          continue;
        }

        // Process the object crop to obtain label
        output = DsExampleProcess (dsexample->dsexamplelib_ctx,
            dsexample->cvmat->data);

        // Attach labels for the object

	attach_metadata_object (dsexample, obj_meta, output);

        free (output);
      }
    }
  }

  flow_ret = GST_FLOW_OK;

error:
  gst_buffer_unmap (inbuf, &in_map_info);
  return flow_ret;
}

/**
 * Attach metadata for the full frame. We will be adding a new metadata.
 */
static void
attach_metadata_full_frame (GstDsExample * dsexample, NvDsFrameMeta *frame_meta,
    gdouble scale_ratio, DsExampleOutput * output, guint batch_id)
{
  NvDsBatchMeta *batch_meta = frame_meta->base_meta.batch_meta;
  NvDsObjectMeta *object_meta = NULL;
  NvDsDisplayMeta *display_meta = NULL;
  static gchar font_name[] = "Serif";
  GST_DEBUG_OBJECT (dsexample, "Attaching metadata %d\n", output->numObjects);

for (gint i = 0; i < output->numObjects; i++) {
    DsExampleObject *obj = &output->object[i];
    object_meta = nvds_acquire_obj_meta_from_pool(batch_meta);
    NvOSD_RectParams & rect_params = object_meta->rect_params;
    NvOSD_TextParams & text_params = object_meta->text_params;

// Assign bounding box coordinates
    /*
    rect_params.left = obj->left;
    rect_params.top = obj->top;
    rect_params.width = obj->width;
    rect_params.height = obj->height;
    */

    /*rect_params.left = 640;
    rect_params.top = 0;
    rect_params.width = 640;
    rect_params.height = 720;

    // Semi-transparent yellow background
    rect_params.has_bg_color = 0;
    rect_params.bg_color = (NvOSD_ColorParams) {
    1, 1, 0, 0.4};
    // Red border of width 6
    rect_params.border_width = 3;
    rect_params.border_color = (NvOSD_ColorParams) {
    1, 0, 0, 1};

    // Scale the bounding boxes proportionally based on how the object/frame was
    // scaled during input
    rect_params.left /= scale_ratio;
    rect_params.top /= scale_ratio;
    rect_params.width /= scale_ratio;
    rect_params.height /= scale_ratio;
    GST_DEBUG_OBJECT (dsexample, "Attaching rect%d of batch%u"
        "  left->%u top->%u width->%u"
        " height->%u label->%s\n", i, batch_id, rect_params.left,
        rect_params.top, rect_params.width, rect_params.height, obj->label);

    object_meta->object_id = UNTRACKED_OBJECT_ID;
    g_strlcpy (object_meta->obj_label, obj->label, MAX_LABEL_SIZE);
    // display_text required heap allocated memory
    text_params.display_text = g_strdup (obj->label);
    // Display text above the left top corner of the object
    text_params.x_offset = rect_params.left;
    text_params.y_offset = rect_params.top - 10;
    // Set black background for the text
    text_params.set_bg_clr = 1;
    text_params.text_bg_clr = (NvOSD_ColorParams) {
    0, 0, 0, 1};
    // Font face, size and color
    text_params.font_params.font_name = font_name;
    text_params.font_params.font_size = 11;
    text_params.font_params.font_color = (NvOSD_ColorParams) {
    1, 1, 1, 1};*/

    //for demonstration, user need to se these values
    display_meta = nvds_acquire_display_meta_from_pool (batch_meta);

    NvOSD_LineParams *line_params  = display_meta->line_params;
    line_params[0].x1 = dsexample->x_coordinate_top;
    line_params[0].y1 = dsexample->y_coordinate_top;
    line_params[0].x2 = dsexample->x_coordinate_bottom;
    line_params[0].y2 = dsexample->y_coordinate_bottom;
    line_params[0].line_width = 3;
    line_params[0].line_color = (NvOSD_ColorParams){ 1, 0, 0, 1};
    display_meta->num_lines++;

    //nvds_add_obj_meta_to_frame(frame_meta, object_meta, NULL);
    nvds_add_display_meta_to_frame (frame_meta, display_meta);
  }
}

/**
 * Only update string label in an existing object metadata. No bounding boxes.
 * We assume only one label per object is generated
 */
static void
attach_metadata_object (GstDsExample * dsexample, NvDsObjectMeta * obj_meta,
    DsExampleOutput * output)
{
  if (output->numObjects == 0)
    return;
  NvDsBatchMeta *batch_meta = obj_meta->base_meta.batch_meta;

  NvDsClassifierMeta *classifier_meta =
    nvds_acquire_classifier_meta_from_pool (batch_meta);

  classifier_meta->unique_component_id = dsexample->unique_id;

  NvDsLabelInfo *label_info =
    nvds_acquire_label_info_meta_from_pool (batch_meta);
  g_strlcpy (label_info->result_label, output->object[0].label, MAX_LABEL_SIZE);
  nvds_add_label_info_meta_to_classifier(classifier_meta, label_info);
  nvds_add_classifier_meta_to_object (obj_meta, classifier_meta);

  nvds_acquire_meta_lock (batch_meta);
  NvOSD_TextParams & text_params = obj_meta->text_params;
  NvOSD_RectParams & rect_params = obj_meta->rect_params;

  /* Below code to display the result */
  // Set black background for the text
  // display_text required heap allocated memory
  if (text_params.display_text) {
    gchar *conc_string = g_strconcat (text_params.display_text, " ",
        output->object[0].label, NULL);
    g_free (text_params.display_text);
    text_params.display_text = conc_string;

} else {
    // Display text above the left top corner of the object
    text_params.x_offset = rect_params.left;
    text_params.y_offset = rect_params.top - 10;
    text_params.display_text = g_strdup (output->object[0].label);
    // Font face, size and color
    text_params.font_params.font_name = (char *)"Serif";
    text_params.font_params.font_size = 11;
    text_params.font_params.font_color = (NvOSD_ColorParams) {
    1, 1, 1, 1};
    // Set black background for the text
    text_params.set_bg_clr = 1;
    text_params.text_bg_clr = (NvOSD_ColorParams) {
    0, 0, 0, 1};
  }
  nvds_release_meta_lock (batch_meta);
}

/**
 * Boiler plate for registering a plugin and an element.
 */
static gboolean
dsexample_plugin_init (GstPlugin * plugin)
{
  GST_DEBUG_CATEGORY_INIT (gst_dsexample_debug, "dsexample", 0,
      "dsexample plugin");

  return gst_element_register (plugin, "dsexample", GST_RANK_PRIMARY,
      GST_TYPE_DSEXAMPLE);
}

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    nvdsgst_dsexample,
    DESCRIPTION, dsexample_plugin_init, DS_VERSION, LICENSE, BINARY_PACKAGE, URL)

But when I print those values inside the gst_dsexample_transform_ip() function I get the default values I have set on line 80-83 on the above code. It doesn’t get the values from the config file. The issue is only for the new parameters I added. Please tell me, what did I miss when adding the new parameters.

2

bump

3

please reply to this issue

4

“[ds-example]” config is parsed in deepstream-app

sources/apps/apps-common/src/deepstream_config_file_parser.c → parse_dsexample()

You can add your setting here.

5

I have added the parameters to the sources/apps/apps-common/src/deepstream_config_file_parser.c → parse_dsexample(). And I tried to generate object file by running the following command

$ gcc  -Wall deepstream_config_file_parser.c -o deepstream_config_file_parser

And I got this error

deepstream_config_file_parser.c:23:10: fatal error: deepstream_common.h: No such file or directory
include “deepstream_common.h”

6

Please give me a solution

7

you should build deeptream-app and dsexample plugin, not build this single source.

8

I use dsexample plugin on objectDetector_Yolo. So first I have built the dsexample plugin by running the following command

sudo CUDA_VER=10.0 make install

Then I have built the objectDetector_Yolo app by running the following commands

export CUDA_VER=10.0
make -C nvdsinfer_custom_impl_Yolo

But the issue remains same. If my steps are wrong, please tell me the correct steps to build the app and plugin.

9

same issue with https://devtalk.nvidia.com/default/topic/1065999/deepstream-sdk/how-to-generate-object-file-from-deepstream_config_file_parser-c/post/5400609/#5400609

10

I have customized the plugin as I mentioned above. But the problem is I can’t access the values inside dsexample plugin. It always read the default values rather than the values given in the deepstream_app_config_yoloV2_tiny.txt file .

Your solution is not clear for me.

11

see chris reply, that’s why you always get default value rather than config value.

12

I have added the settings to sources/apps/apps-common/src/deepstream_config_file_parser.c → parse_dsexample() as Chris mentioned. But the issue remains same.

13

I couldn’t find the solution yet. Please help

14

Have you fixed the issue ? deepstream-app and all nvinfer code all are there, can you debug it?
deepstream_common.h is here: ./sources/apps/apps-common/includes/deepstream_common.h

15

No, I wasn’t able to fix it. I have added the parameters to the sources/apps/apps-common/src/deepstream_config_file_parser.c → parse_dsexample() as you said. But how can I compile that deepstream_config_file_parser.c after doing the changes.

16

$ cd sources/apps/sample_apps/deepstream-app
$ make

If “fatal error: gst/rtsp-server/rtsp-server.h: No such file or directory”
$ sudo apt-get install libgstrtspserver-1.0-dev

17

I got this error

uh5190@uh5190-desktop:~/Downloads/deepstream_sdk_v4.0_jetson/sources/apps/sample_apps/deepstream-app$ make
cc -c -o ../../apps-common/src/deepstream_config_file_parser.o -DPLATFORM_TEGRA -I../../apps-common/includes -I../../../includes -DDS_VERSION_MINOR=0 -DDS_VERSION_MAJOR=4 `pkg-config --cflags gstreamer-1.0 gstreamer-video-1.0 x11` ../../apps-common/src/deepstream_config_file_parser.c
../../apps-common/src/deepstream_config_file_parser.c: In function ‘parse_dsexample’:
../../apps-common/src/deepstream_config_file_parser.c:546:13: error: ‘NvDsDsExampleConfig {aka struct <anonymous>}’ has no member named ‘x’
       config->x-coordinate-top =
             ^~
../../apps-common/src/deepstream_config_file_parser.c:546:17: error: ‘coordinate’ undeclared (first use in this function); did you mean ‘GPrivate’?
       config->x-coordinate-top =
                 ^~~~~~~~~~
                 GPrivate
../../apps-common/src/deepstream_config_file_parser.c:546:17: note: each undeclared identifier is reported only once for each function it appears in
../../apps-common/src/deepstream_config_file_parser.c:546:28: error: ‘top’ undeclared (first use in this function)
       config->x-coordinate-top =
                            ^~~
Makefile:56: recipe for target '../../apps-common/src/deepstream_config_file_parser.o' failed
make: *** [../../apps-common/src/deepstream_config_file_parser.o] Error 1
18

This is the updated parse_dsexample() function. Line 31-35 contains the new element I want to parse to dsexample.

parse_dsexample (NvDsDsExampleConfig *config, GKeyFile *key_file)
{
  gboolean ret = FALSE;
  gchar **keys = NULL;
  gchar **key = NULL;
  GError *error = NULL;

  keys = g_key_file_get_keys (key_file, CONFIG_GROUP_DSEXAMPLE, NULL, &error);
  CHECK_ERROR (error);
  for (key = keys; *key; key++) {
    if (!g_strcmp0 (*key, CONFIG_GROUP_ENABLE)) {
      config->enable =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_ENABLE, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_FULL_FRAME)) {
      config->full_frame =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_DSEXAMPLE_FULL_FRAME, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_PROCESSING_WIDTH)) {
      config->processing_width =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_DSEXAMPLE_PROCESSING_WIDTH, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_PROCESSING_HEIGHT)) {
      config->processing_height =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_DSEXAMPLE_PROCESSING_HEIGHT, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_X_COORDINATE_TOP)) {
      config->x-coordinate-top =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_DSEXAMPLE_X_COORDINATE_TOP, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_UNIQUE_ID)) {
      config->unique_id =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_DSEXAMPLE_UNIQUE_ID, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_GPU_ID)) {
      config->gpu_id =
        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
            CONFIG_GROUP_DSEXAMPLE_GPU_ID, &error);
      CHECK_ERROR (error);
    } else if (!g_strcmp0 (*key, CONFIG_NVBUF_MEMORY_TYPE)) {
      config->nvbuf_memory_type =
          g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
          CONFIG_NVBUF_MEMORY_TYPE, &error);
      CHECK_ERROR (error);
    } else {
      NVGSTDS_WARN_MSG_V ("Unknown key '%s' for group [%s]", *key,
          CONFIG_GROUP_DSEXAMPLE);
    }
  }

  ret = TRUE;
done:
  if (error) {
    g_error_free (error);
  }
  if (keys) {
    g_strfreev (keys);
  }
  if (!ret) {
    NVGSTDS_ERR_MSG_V ("%s failed", __func__);
  }
  return ret;
}
19

I can build succussfully.

--- a/apps/apps-common/includes/deepstream_dsexample.h
+++ b/apps/apps-common/includes/deepstream_dsexample.h
@@ -38,6 +38,7 @@ typedef struct
   gboolean full_frame;
   gint processing_width;
   gint processing_height;
+  gint x_top;
   guint unique_id;
   guint gpu_id;
   // For nvvidconv
diff --git a/apps/apps-common/src/deepstream_config_file_parser.c b/apps/apps-common/src/deepstream_config_file_parser.c
index b1180ca..78de4c8 100755
--- a/apps/apps-common/src/deepstream_config_file_parser.c
+++ b/apps/apps-common/src/deepstream_config_file_parser.c
@@ -580,7 +580,12 @@ parse_dsexample (NvDsDsExampleConfig *config, GKeyFile *key_file)
         g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
             CONFIG_GROUP_DSEXAMPLE_UNIQUE_ID, &error);
       CHECK_ERROR (error);
-    } else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_GPU_ID)) {
+    }  else if (!g_strcmp0 (*key, "x_top")) {
+      config->x_top =
+        g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
+            "x_top", &error);
+      CHECK_ERROR (error);
+    }  else if (!g_strcmp0 (*key, CONFIG_GROUP_DSEXAMPLE_GPU_ID)) {
       config->gpu_id =
         g_key_file_get_integer (key_file, CONFIG_GROUP_DSEXAMPLE,
             CONFIG_GROUP_DSEXAMPLE_GPU_ID, &error);
20

Now it builds successfully. But the issue remains same. Still, the variable in the “gstdsexample.cpp” get value from it’s default value rather than the value assigned in “deepstream_app_config_yoloV2_tiny.txt”

And I get this warning message

** WARN: <parse_dsexample:561>: Unknown key 'x-top' for group [ds-example]

when I run this command

deepstream-app -c deepstream_app_config_yoloV2_tiny.txt