1file_pgie_iou_tracker_osd_window_v4l2.cpp

/*
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*/

/* ##############################################################################
#
# This simple example demonstrates how to create a set of Pipeline components, 
# specifically:
#   - A File Source
#   - Primary GST Inference Engine (PGIE)
#   - IOU Tracker
#   - On-Screen Display
#   - Window Sink
#   - V4L2 Sink
# ...and how to add them to a new Pipeline and play.
#
# The V4L2 Sink is used to display video to v4l2 video devices. 
# 
# V4L2 Loopback can be used to create "virtual video devices". Normal (v4l2) 
# applications will read these devices as if they were ordinary video devices.
# See: https://github.com/umlaeute/v4l2loopback for more information.
#
# You can install v4l2loopback with
#    $ sudo apt-get install v4l2loopback-dkms
#
# Run the following to setup '/dev/video3'
#    $ sudo modprobe v4l2loopback video_nr=3
#
# When the script is running, you can use the following GStreamer launch 
# command to test the loopback
#    $ gst-launch-1.0 v4l2src device=/dev/video3 ! videoconvert  ! xvimagesink
#
# The example registers handler callback functions for:
#   - key-release events
#   - delete-window events
#   - end-of-stream EOS events
#   - Pipeline change-of-state events
#  
############################################################################## */

#include <iostream>
#include <glib.h>
#include <gst/gst.h>
#include <gstnvdsmeta.h>
#include <nvdspreprocess_meta.h>

#include "DslApi.h"

std::wstring file_path(
    L"/opt/nvidia/deepstream/deepstream/samples/streams/sample_1080p_h265.mp4");

// Config and model-engine files 
std::wstring primary_infer_config_file(
    L"/opt/nvidia/deepstream/deepstream/sources/apps/sample_apps/deepstream-preprocess-test/config_infer.txt");
std::wstring primary_model_engine_file(
    L"/opt/nvidia/deepstream/deepstream/samples/models/Primary_Detector/resnet18_trafficcamnet.etlt_b8_gpu0_int8.engine");

// Config file used by the IOU Tracker    
std::wstring iou_tracker_config_file(
    L"/opt/nvidia/deepstream/deepstream/samples/configs/deepstream-app/config_tracker_IOU.yml");

// V4L2 Sink device location to stream to
std::wstring DEVICE_LOCATION = L"/dev/video3";

uint WINDOW_WIDTH = 1280;
uint WINDOW_HEIGHT = 720;

// 
// Function to be called on XWindow KeyRelease event
// 
void xwindow_key_event_handler(const wchar_t* in_key, void* client_data)
{   
    std::wstring wkey(in_key); 
    std::string key(wkey.begin(), wkey.end());
    std::cout << "key released = " << key << std::endl;
    key = std::toupper(key[0]);
    if(key == "P"){
        dsl_pipeline_pause(L"pipeline");
    } else if (key == "R"){
        dsl_pipeline_play(L"pipeline");
    } else if (key == "Q" or key == "" or key == ""){
        std::cout << "Main Loop Quit" << std::endl;
        dsl_pipeline_stop(L"pipeline");
        dsl_main_loop_quit();
    }
}

// 
// Function to be called on XWindow Delete event
//
void xwindow_delete_event_handler(void* client_data)
{
    std::cout<<"delete window event"<<std::endl;
    dsl_pipeline_stop(L"pipeline");
    dsl_main_loop_quit();
}
    
// 
// Function to be called on End-of-Stream (EOS) event
// 
void eos_event_listener(void* client_data)
{
    std::cout<<"Pipeline EOS event"<<std::endl;
    dsl_pipeline_stop(L"pipeline");
    dsl_main_loop_quit();
}    

// 
// Function to be called on every change of Pipeline state
// 
void state_change_listener(uint old_state, uint new_state, void* client_data)
{
    std::cout<<"previous state = " << dsl_state_value_to_string(old_state) 
        << ", new state = " << dsl_state_value_to_string(new_state) << std::endl;
}

int main(int argc, char** argv)
{
    DslReturnType retval = DSL_RESULT_FAILURE;

    // Since we're not using args, we can Let DSL initialize GST on first call    
    while(true) 
    {    

        // New File Source using the file path specified above, repeat enabled.
        retval = dsl_source_file_new(L"file-source", file_path.c_str(), true);
        if (retval != DSL_RESULT_SUCCESS) break;

        // New Primary GIE using the filespecs defined above, with interval and Id
        retval = dsl_infer_gie_primary_new(L"primary-gie", 
            primary_infer_config_file.c_str(), primary_model_engine_file.c_str(), 0);
        if (retval != DSL_RESULT_SUCCESS) break;

        // New IOU Tracker, setting operational width and height of input frame
        retval = dsl_tracker_new(L"iou-tracker", 
            iou_tracker_config_file.c_str(), 480, 272);
        if (retval != DSL_RESULT_SUCCESS) break;

        // New OSD with text, clock and bbox display all enabled. 
        retval = dsl_osd_new(L"on-screen-display", true, true, true, false);
        if (retval != DSL_RESULT_SUCCESS) break;

        // New 3D Window Sink with 0 x/y offsets, and same dimensions as Camera Source
        // EGL Sink runs on both platforms. 3D Sink is Jetson only.
        if (dsl_info_gpu_type_get(0) == DSL_GPU_TYPE_INTEGRATED)
        {
            retval = dsl_sink_window_3d_new(L"window-sink", 0, 0, 
                WINDOW_WIDTH, WINDOW_HEIGHT);            
        }
        else
        {
            retval = dsl_sink_window_egl_new(L"window-sink", 0, 0, 
                WINDOW_WIDTH, WINDOW_HEIGHT);            
        }
        if (retval != DSL_RESULT_SUCCESS) break;

        // Add the XWindow event handler functions defined above
        retval = dsl_sink_window_key_event_handler_add(L"window-sink", 
            xwindow_key_event_handler, NULL);
        if (retval != DSL_RESULT_SUCCESS) break;

        retval = dsl_sink_window_delete_event_handler_add(L"window-sink", 
            xwindow_delete_event_handler, NULL);
        if (retval != DSL_RESULT_SUCCESS) break;
    
        // New V4L2 Sink 
        retval = dsl_sink_v4l2_new(L"v4l2-sink", DEVICE_LOCATION.c_str());
        if (retval != DSL_RESULT_SUCCESS) break;

        // Create a list of Pipeline Components to add to the new Pipeline.
        const wchar_t* components[] = {L"file-source",  L"primary-gie", 
            L"iou-tracker", L"on-screen-display", L"window-sink", L"v4l2-sink", NULL};
        
        // Add all the components to our pipeline
        retval = dsl_pipeline_new_component_add_many(L"pipeline", components);
        if (retval != DSL_RESULT_SUCCESS) break;
            
        // Add the EOS listener function defined above
        retval = dsl_pipeline_eos_listener_add(L"pipeline", eos_event_listener, NULL);
        if (retval != DSL_RESULT_SUCCESS) break;

        // Add the State Change listener function defined above
        retval = dsl_pipeline_state_change_listener_add(L"pipeline", 
            state_change_listener, NULL);
        if (retval != DSL_RESULT_SUCCESS) break;

        // Play the pipeline
        retval = dsl_pipeline_play(L"pipeline");
        if (retval != DSL_RESULT_SUCCESS) break;
        
        // Start and join the main-loop
        dsl_main_loop_run();
        break;

    }
    
    // Print out the final result
    std::cout << dsl_return_value_to_string(retval) << std::endl;

    dsl_delete_all();

    std::cout<<"Goodbye!"<<std::endl;  
    return 0;
}