/*---------------------------------------------------------------
 * Copyright (c) 2017
 * Broadcom Corporation
 * All Rights Reserved.
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 * the following disclaimers.
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 * disclaimers in the documentation and/or other materials
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 * nor the names of its contributors may be used to endorse
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 * ________________________________________________________________
 *
 * checkisoch.cpp
 *
 * Test routine to test the isochronous functions
 *
 * by Robert J. McMahon (rjmcmahon@rjmcmahon.com, bob.mcmahon@broadcom.com)
 * ------------------------------------------------------------------- */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <errno.h>
#include <string.h>
#include <math.h>
#include <unistd.h>
#include "headers.h"
#include "isochronous.hpp"
#include "delay.h"
#include "pdfs.h"
#include "util.h"

static void posttimestamp(int, int);

int main (int argc, char **argv) {
    int c, count=61, frequency=60;
    float mean=1e8;
    float variance=3e7;

    Isochronous::FrameCounter *fc = NULL;
    
    while ((c = getopt(argc, argv, "c:f:m:v:")) != -1) {
        switch (c) {
        case 'c':
            count = atoi(optarg);
            break;
        case 'f':
	    frequency = atoi(optarg);
            break;
	case 'm':
	    mean=byte_atof(optarg);
	    break;
	case 'v':
	    variance=byte_atof(optarg);
	    break;
        case '?':
            fprintf (stderr, "usage: -c <count> -f <frames per second> -m <mean> -v <variance>\n");
            return 1;
        default:
            abort ();
        }
    }
    fc = new Isochronous::FrameCounter(frequency);

    fprintf(stdout,"Timestamping %d times at %d fps\n", count, frequency);
    fflush(stdout);
    while (count-- > 0) {
	if (count == 8) {
	    delay_loop (1000000/frequency + 10);
	}
	fc->wait_tick();
	posttimestamp(count, (round(lognormal(mean,variance)) / (frequency * 8)));
	if (fc->slip) {
	    fprintf(stdout,"Slip occurred\n");
	    fc->slip = 0;
	}
    }
}

void posttimestamp (int count, int bytes) {
    struct timespec t1;
    double timestamp;
    int err;

    err = clock_gettime(CLOCK_REALTIME, &t1);
    if (err < 0) {
        perror("clock_getttime");
    } else {
        timestamp = t1.tv_sec + (t1.tv_nsec / 1000000000.0);
        fprintf(stdout,"%f counter(%d), sending %d bytes\n", timestamp, count, bytes);
    }
    fflush(stdout);
}