📄 peopletracker.h
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///////////////////////////////////////////////////////////////////////////////// //// PeopleTracker.h //// //// This class handles and schedules trackers and outputs tracking results //// //// It instantiates Camera objects which in turn hold everything associated //// with the respective camera: Inputs, Calibration, the actual Tracking //// class which generates and stores results, a Configuration class etc. //// //// The PeopleTracker lets each Camera class start a thread. These wait //// for the PeopleTracker to supply the input (images, XML motion data). //// After tracking, they signal us that they have new results. The //// PeopleTracker then extracts the results from the Camera and fuses data //// from all cameras in order to write the person/object tracks out in XML //// format. //// //// Author : Nils T Siebel (nts) //// Created : Thu Jan 10 17:20:32 GMT 2002 //// Revision : 0.0 of Thu Jan 10 17:20:32 GMT 2002 //// Copyright : The University of Reading //// //// Changes: //// nts: rev 1.0: initial working revision The Future //// /////////////////////////////////////////////////////////////////////////////////#include <cstdio>#include <iostream>#include <cassert>#include <limits.h>#include <ctime> // for time()#ifdef _BSD_SOURCE#include <unistd.h> // for gethostname()#endif// NB: under WIN32, please use the free ``pthreads for win32'' library,// see http://sources.redhat.com/pthreads-win32/#include <pthread.h> // for IEEE POSIX 1003.1c --- 1995 threads#include "timestamp_c.h" // defines TS_TIMESTAMP#include "tracker_defines_types_and_helpers.h"namespace ReadingPeopleTracker{class ConfigurationManager;class Camera;// Maximum number of cameras per PeopleTracker. Use 4 within the ADVISOR project.#define MAX_NUM_CAMERAS 4class PeopleTracker{protected: ConfigurationManager *configuration; Camera *cameras [MAX_NUM_CAMERAS]; // pointers to Camera classes unsigned int number_of_cameras; // number of Camera classes instantiated char *configuration_filename_base; // POSIX threading stuff pthread_t thread_id; // our own unique thread id: this will usually be an unsigned long int pthread_t camera_thread_id [MAX_NUM_CAMERAS]; // thread ids of individual cameras // this is the threaded method waiting for data and doing all the processing void *do_processing(void *unused); // NB the method will never return // Windows requires some overhead here ... static void *start_processing(void *people_tracker_object_ptr) // NB the method will never return { return ((PeopleTracker *) people_tracker_object_ptr) -> do_processing(NULL); } int state; // < 0 if there is an error, == 0 otherwise. Use get_state() to query // whether there is an error but note get_state() return values below. time_t start_time; // time the PeopleTracker was started, in seconds since the Epoch. frame_id_t current_frame_id; // frame id of current / processed results frame_id_t previous_frame_id; // frame id of previous frame / processed results frame_id_t frame_count; // simple frame count: #frames completely processed (starts at 0) static pthread_mutex_t write_access_to_max_id_used_so_far; static object_id_t max_id_used_so_far; // configuration parameters char *camera_1_name; char *camera_2_name; char *camera_3_name; char *camera_4_name; volatile bool camera_1_enabled; volatile bool camera_2_enabled; volatile bool camera_3_enabled; volatile bool camera_4_enabled; volatile bool quiet_mode; volatile bool write_results_in_XML; // whether to write out tracking results in XML char *xml_tracking_results_filename; // the file to write it to ostream *xml_tracking_results_ostream_ptr; // ostream of the above file, or cinfo #ifdef _BSD_SOURCE // host name if we have it (SVr4, 4.4BSD, POSIX 1003.1-2001) char hostname[HOST_NAME_MAX + 2];#endif public: PeopleTracker(char *toplevel_config_filename); // check get_state() to detect failure ~PeopleTracker(); // set up cameras according to configuration/parameter file void setup_cameras(); // static member function to create a new, globally unique id static object_id_t create_new_id() { pthread_mutex_lock(&write_access_to_max_id_used_so_far); // object_id_t new_id = ++max_id_used_so_far; // pthread_mutex_unlock(&write_access_to_max_id_used_so_far); return new_id; } int get_state(); // return number of active cameras if no error, state, < 0, otherwise // start a thread which does all processing as data arrives. returns thread id pthread_t start_thread(); int add_cameras (unsigned int num_cameras_to_add, char *camera_names[]); int remove_cameras (unsigned int num_cameras_to_remove, char *camera_names[]); void handle_new_video_image (unsigned int camera_number, unsigned char *image_data, TS_TIMESTAMP *timestamp); void handle_new_background_image (unsigned int camera_number, unsigned char *image_data, TS_TIMESTAMP *timestamp); void handle_new_motion_image (unsigned int camera_number, unsigned char *image_data, TS_TIMESTAMP *timestamp); void handle_new_blob_data (unsigned int camera_number, unsigned char *xml_data, unsigned int data_size); protected: // make sure no-one inadvertedly uses copy constructor or operator= PeopleTracker (PeopleTracker &original) { bool this_is_recommended = false; assert (this_is_recommended == true); // do not use the copy constructor! } PeopleTracker &operator= (PeopleTracker &original) { bool this_is_recommended = false; assert (this_is_recommended == true); // do not use the copy constructor return *this; } private: // private helpers // // Method to write out XML data to a given ostream // void write_results_in_XML_to_stream(ostream &out); void register_configuration_parameters();};} // namespace ReadingPeopleTracker⌨️ 快捷键说明
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