preferences.c

LINUX下非常有名的视频采集和显示源代码,直接安装后可以使用,效果很好

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <pthread.h>
#include <linux/types.h> 
#include <gtk/gtk.h>
#include <glib.h>
#include <linux/videodev.h>
#include <png.h>
#include "gqcam.h"
#include "frontend.h"
#include "preferences.h"
#include "save.h"
#include "color.h"
#include "greyscale.h"
#include "timer.h"

void pref_dialog(GtkWidget *widget, struct Camera *camera)
{
  /*
  GtkWidget *prefdialog;
  GtkWidget *prefnotebook;

  GtkWidget *generalpage;
  GtkWidget *generaltab;
  GtkWidget *autobright;

  GtkWidget *filterspage;
  GtkWidget *filterstab;
  GtkWidget *rgbswap;

  GtkWidget *button;
  GtkWidget *label;
  */

  camera->pref_dialog.prefdialog = gtk_dialog_new();

  camera->pref_dialog.prefnotebook = gtk_notebook_new();
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG(camera->pref_dialog.prefdialog)->vbox), camera->pref_dialog.prefnotebook, TRUE, TRUE, 0);
  gtk_widget_show(camera->pref_dialog.prefnotebook);

  camera->pref_dialog.generalpage = gtk_hbox_new(TRUE, 0);
  gtk_widget_show(camera->pref_dialog.generalpage);
  camera->pref_dialog.generaltab = gtk_label_new("General");
  gtk_widget_show(camera->pref_dialog.generaltab);

  camera->pref_dialog.autobright = gtk_check_button_new_with_label ("Autoscale brightness");
  gtk_box_pack_start(GTK_BOX(camera->pref_dialog.generalpage), camera->pref_dialog.autobright, TRUE, TRUE, 0);
  if(camera->autobright)
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(camera->pref_dialog.autobright), 1);
  gtk_widget_show(camera->pref_dialog.autobright);

  gtk_notebook_append_page(GTK_NOTEBOOK(camera->pref_dialog.prefnotebook), camera->pref_dialog.generalpage, camera->pref_dialog.generaltab);


  camera->pref_dialog.filterspage = gtk_hbox_new(TRUE, 0);
  gtk_widget_show(camera->pref_dialog.filterspage);
  camera->pref_dialog.filterstab = gtk_label_new("Filters");
  gtk_widget_show(camera->pref_dialog.filterstab);
  camera->pref_dialog.rgbswap = gtk_check_button_new_with_label ("RGB -> BGR Conversion");
  gtk_box_pack_start(GTK_BOX(camera->pref_dialog.filterspage), camera->pref_dialog.rgbswap, TRUE, TRUE, 0);
  if(camera->swapcolors)
    gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(camera->pref_dialog.rgbswap), 1);
  gtk_widget_show(camera->pref_dialog.rgbswap);
  gtk_notebook_append_page(GTK_NOTEBOOK(camera->pref_dialog.prefnotebook), camera->pref_dialog.filterspage, camera->pref_dialog.filterstab);


  camera->pref_dialog.button = gtk_button_new_with_label("Ok");
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG(camera->pref_dialog.prefdialog)->action_area), camera->pref_dialog.button, TRUE, TRUE, 0);
  gtk_signal_connect (GTK_OBJECT(camera->pref_dialog.button), "clicked", (GtkSignalFunc) ok_prefs, camera);
  gtk_widget_show (camera->pref_dialog.button);

  camera->pref_dialog.button = gtk_button_new_with_label("Apply");
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG(camera->pref_dialog.prefdialog)->action_area), camera->pref_dialog.button, TRUE, TRUE, 0);
  gtk_signal_connect (GTK_OBJECT(camera->pref_dialog.button), "clicked", (GtkSignalFunc) apply_prefs, camera);
  gtk_widget_show (camera->pref_dialog.button);

  camera->pref_dialog.button = gtk_button_new_with_label("Close");
  gtk_box_pack_start (GTK_BOX (GTK_DIALOG(camera->pref_dialog.prefdialog)->action_area), camera->pref_dialog.button, TRUE, TRUE, 0);
  gtk_signal_connect (GTK_OBJECT(camera->pref_dialog.button), "clicked", (GtkSignalFunc) closedialog, camera->pref_dialog.prefdialog);
  gtk_widget_show (camera->pref_dialog.button);



  gtk_widget_show(camera->pref_dialog.prefdialog);

  return;

}

void read_pref_file(FILE *input, struct Camera *camera)
{
  char buff[1024], command[1024];  
  int val=0;
  
  while(fgets(buff, sizeof(buff), input) != NULL){
    if((buff[0] != '#') && (buff[0] != '\n'))
      {
	sscanf(buff, " %s %d", command, &val);
	//printf("%s: %d\n", command, val);
	if(!strcmp(command, "autobrightness"))
	  camera->autobright = val;
	else if(!strcmp(command, "swaprgb")){
	  camera->swapcolors = val;
	}
	
	else
	  printf("Unknown preference: %s\n", command);
	
      }
  }
}

void save_pref_file(FILE *output, struct Camera *camera)
{
  fprintf(output, "autobrightness %d\n", camera->autobright);
  fprintf(output, "swaprgb %d\n", camera->swapcolors);
}

void ok_prefs(GtkWidget *widget, struct Camera *camera)
{
  apply_prefs(widget, camera);
  closedialog(widget, camera->pref_dialog.prefdialog);
}


void apply_prefs(GtkWidget *widget, struct Camera *camera)
{
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(camera->pref_dialog.rgbswap)))
    camera->swapcolors=1;
  else
    camera->swapcolors=0;
  
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(camera->pref_dialog.autobright)))
    camera->autobright = 1;
  else
    camera->autobright = 0;


}