#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <assert.h>
#include <stdint.h>

#include <stdio.h>
#include <errno.h>
#include <time.h>
#include <sys/types.h>
#include <stdint.h>

#include <linux/dvb/dmx.h>
#include <linux/dvb/version.h>
#include <linux/dvb/frontend.h>

int simplescan()
{
  struct dvb_frontend_info fe_info;
  struct dtv_property cmdargs[20];
  struct dtv_properties cmdseq;
  int freq;
  int fd;
  int i;
  int testflags;
  fe_status_t status;
  int adapter;
  int frontend;
  char frontend_name[80];

  //transponder freq
  freq = 498000000;

  adapter = 0;
  frontend = 1;
  
  memset(frontend_name, 0, sizeof(frontend_name));
  snprintf (frontend_name, sizeof(frontend_name), "/dev/dvb/adapter%i/frontend%i", adapter, frontend);


  fprintf(stderr, "<SIMPLE SCAN>\n");

  
  if ((fd = open (frontend_name, O_RDWR)) < 0)
  { 
    error("Open1 failed\n"); 
    return 0;	     
  }


  
  //
  // comment next line to get it work!
  ioctl( fd, FE_GET_INFO, &fe_info );

  //
  //

  

  close(fd);
  if ((fd = open (frontend_name, O_RDWR)) < 0) 
  {  
      error("Open2 failed\n");  
     return 0;	      
   }  
  ioctl( fd, FE_GET_INFO, &fe_info );  
  fprintf(stderr, "Using DVB device %s \"%s\"\n",frontend_name, fe_info.name);
  

  cmdargs[0].cmd = DTV_DELIVERY_SYSTEM; cmdargs[0].u.data = SYS_DVBT;
  cmdargs[1].cmd = DTV_FREQUENCY; cmdargs[1].u.data = freq;
  cmdargs[2].cmd = DTV_MODULATION; cmdargs[2].u.data = QAM_16;
  cmdargs[3].cmd = DTV_CODE_RATE_HP; cmdargs[3].u.data = FEC_3_4;
  cmdargs[4].cmd = DTV_CODE_RATE_LP; cmdargs[4].u.data = FEC_AUTO;
  cmdargs[5].cmd = DTV_GUARD_INTERVAL; cmdargs[5].u.data = GUARD_INTERVAL_AUTO;
  cmdargs[6].cmd = DTV_TRANSMISSION_MODE; cmdargs[6].u.data = TRANSMISSION_MODE_8K;
  cmdargs[7].cmd = DTV_HIERARCHY; cmdargs[7].u.data = HIERARCHY_NONE;
  cmdargs[8].cmd = DTV_BANDWIDTH_HZ; cmdargs[8].u.data = 8000000;
  cmdargs[9].cmd = DTV_INVERSION; cmdargs[9].u.data = INVERSION_AUTO;
  cmdargs[10].cmd = DTV_TUNE;
  cmdseq.num = 11;
  cmdseq.props = cmdargs;  

  
  testflags = fcntl(fd, F_GETFL); 
  
  if ( ioctl( fd, FE_SET_PROPERTY, &cmdseq )<0 ) {
    fprintf(stderr, "ERROR tuning\n");
    close(fd);
    return 0;
  }

  for (i=0; i< 10; i++)
  {
    usleep( 100000 );
    fprintf( stderr, "." );
    if ( ioctl( fd, FE_READ_STATUS, &status )==-1 ) {
      perror( "FE_READ_STATUS" );
      break;
    }
    if ( status & FE_HAS_LOCK ) {
      fprintf(stderr," LOCKED.");
      return 1;      
    }
  }

  fprintf(stderr, " </SIMPLE SCAN>\n");
  return 0;
}


int main (int argc, char **argv)
{
  simplescan();
}