gaze_output_frequencies.c

#include <stdio.h>
#include "tobii_research_eyetracker.h"
 
void gaze_output_frequencies_example(TobiiResearchEyeTracker* eyetracker) {
    float initial_gaze_output_frequency;
 
    TobiiResearchStatus status = tobii_research_get_gaze_output_frequency(eyetracker, &initial_gaze_output_frequency);
 
    printf("The eye tracker's initial gaze output frequency is %f Hz with status %i.\n",
            initial_gaze_output_frequency, status);
    {
        TobiiResearchGazeOutputFrequencies* frequencies = NULL;
        size_t i = 0;
        status = tobii_research_get_all_gaze_output_frequencies(eyetracker, &frequencies);
 
        if (status == TOBII_RESEARCH_STATUS_OK) {
            for(; i < frequencies->frequency_count; i++) {
                status = tobii_research_set_gaze_output_frequency(eyetracker, frequencies->frequencies[i]);
                printf("Gaze output frequency set to %f Hz with status %i.\n", frequencies->frequencies[i], status);
            }
            tobii_research_set_gaze_output_frequency(eyetracker, initial_gaze_output_frequency);
 
            printf("Gaze output frequency reset to %f Hz.\n", initial_gaze_output_frequency);
        } else {
            printf("tobii_research_get_all_gaze_output_frequencies returned status %i.\n", status);
        }
 
        tobii_research_free_gaze_output_frequencies(frequencies);
    }
 
}