source: trunk/packages/vizservers/nanovis/EventPlayer.cpp @ 1429

/*
 * ----------------------------------------------------------------------
 *  EventPlayer.cpp: client that plays back events from file
 *
 * ======================================================================
 *  AUTHOR:  Wei Qiao <qiaow@purdue.edu>
 *           Purdue Rendering and Perceptualization Lab (PURPL)
 *
 *  Copyright (c) 2004-2006  Purdue Research Foundation
 *
 *  See the file "license.terms" for information on usage and
 *  redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 * ======================================================================
 */

#include <stdlib.h>
#include <unistd.h>
#include <sstream>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <iostream>
#include <assert.h>

#include "clientlib.h"
#include "../Event.h"

using namespace std;

Event* event[300];
int cur_event = 0;
double interval_sum = 0;

int width = 512;
int height = 512;
char screen_buffer[512*512*3];
int screen_size = width * height;

int socket_fd;  //socekt file descriptor

/*
void display()
{
   //paste to screen 
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glDrawPixels(width, height, GL_RGB, GL_UNSIGNED_BYTE, screen_buffer);        
   glFlush();
   glutSwapBuffers();
   return;
}
*/


void key(unsigned char key, int x, int y)
{
    switch (key)
    {
        case 'q':
          exit(0);
          break;
        default:
          return;
    }
}


/*
 *Client communicates with the server
 */
void idle(void)
{
  //send requests

  if (cur_event >= sizeof(event)/sizeof(event[0])) {
    float ave = interval_sum / (cur_event-1);
    float fps = 1/ave;
    printf("Average frame time = %.6f\n", ave);
    printf("Frames per second  = %f\n", fps);
    exit(0);
  }

  Event* cur = event[cur_event];
  std::stringstream msgstream;
  std::string msg;

  switch(cur->type){
    case 0: //rotate
      msgstream << "camera " << cur->parameter[0] << " " 
                    << cur->parameter[1] << " " 
                    << cur->parameter[2] << " " << endl;
      break;

    case 1: //move
      msgstream << "move " << cur->parameter[0] << " " 
                    << cur->parameter[1] << " " 
                    << cur->parameter[2] << " " << endl;
      break;

    case 2: //other
      msgstream << "refresh " << cur->parameter[0] << " " 
                    << cur->parameter[1] << " " 
                    << cur->parameter[2] << " " << endl;
      break;

    default:
      return;
  }

  msg = msgstream.str();

  //sleep a little
  struct timespec ts;
  ts.tv_sec = 0;
  ts.tv_nsec = cur->msec*1000000000;
  nanosleep(&ts, 0);
  
  //start timer
  struct timeval clock;
  gettimeofday(&clock, NULL);
  double start_time = clock.tv_sec + clock.tv_usec/1000000.0;

  //send msg
  //printf("Writing message %04d to server: '%s'\n", cur_event, msg.c_str());
  int status = write(socket_fd, msg.c_str(), strlen(msg.c_str()));
  if (status <= 0) {
     perror("socket write");
     return;
  }

#if DO_RLE
  int sizes[2];
  status = read(socket_fd, &sizes, sizeof(sizes));
  printf("Reading %d,%d bytes\n", sizes[0], sizes[1]);
  int len = sizes[0] + sizes[1];
#else
  int len = width * height * 3;
#endif

  //receive screen update
  int remain = len;
  char* ptr = screen_buffer;
  while(remain>0){
    status = read(socket_fd, ptr, remain);
    if(status <= 0) {
      perror("socket read");
      return;
    }
    else {
       remain -= status;
       ptr += status;
    }
  }

  //printf("Read message to server.\n");

  //end timer
  gettimeofday(&clock, NULL);
  double end_time = clock.tv_sec + clock.tv_usec/1000000.0;

  double time_interval = end_time - start_time;

  if (cur_event != 0) {
    interval_sum += time_interval;
  }
  cur_event++;

  fprintf(stderr, "% 6d %.6f\n", len, time_interval);
}


int init_client(char* host, char* port, char* file){

  //load the event file
  FILE* fd = fopen(file, "r");

  //load events
  for(int i=0; i<sizeof(event)/sizeof(event[0]); i++){
    int type;
    float param[3];
    double interval;
    fscanf(fd, "%d %f %f %f %g\n", &type, param, param+1, param+2, &interval);
    event[i] = new Event(type, param, interval);
    //fprintf(stderr, "%d %f %f %f\n", type, param[0], param[1], param[2]);
  }
  fclose(fd);

  socket_fd = connect_renderer(host, atoi(port), 100);
  if (socket_fd == -1) {
     fprintf(stderr, "Could not connect to a server.\n");
     return 1;
  }

  return 0;
}

void help(const char *argv0)
{
  fprintf(stderr,
          "Syntax: %s addr port eventfile\n",
          argv0);
  exit(1);
}

/* Program entry point */
int main(int argc, char *argv[])
{
    //parameters: host and port and event file
    if(argc!=4) help(argv[0]);

    assert(init_client(argv[1], argv[2], argv[3])==0);

/*
    glutInit(&argc, argv);
    glutInitWindowSize(width,height);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);

    glutCreateWindow("Client");

    glutDisplayFunc(display);
    glutKeyboardFunc(key);
    glutIdleFunc(idle);

    glClearColor(0.,0.,0.,0.);
    glutMainLoop();
*/
    while(1) idle();

    return 0;
}