show_video_v4l_main.c

一个可以进行视频采集和显示的源代码,在LINUX操作系统下使用,可通过修改移植到ARM.

/*==========================================================================
  $Id$
  show_video_v4l_main.c: Main routine for capturing video using GLUT and V4L.
  Written by Naoyuki Ichimura, AIST, 2001.
==========================================================================*/

#include "show_video_v4l.h"

int extract_skin_color;	/* global variable for enabling image processing */

int main( int argc , char *argv[] )
{

    static char window_title[1024]="Video Capture";

    int i,j;
    int video_input;

    double zoom_rate;	/* for zooming */

/*======= Set option =========================================*/
    zoom_rate = DEFAULT_ZOOM_RATE;
    video_input = S_VIDEO;
    extract_skin_color = 0;
    for( i = j = 1 ; i < argc ; i++ ) {
	if( argv[i][0] == '-' || argv[i][0] == '/' ) {
	    switch( argv[i][1] ) {
	      case 'z':
		zoom_rate = atof(&argv[i][2]);
		break;

	      case 'v':
		video_input = atoi(&argv[i][2]);
		break;

	      case 's':
		extract_skin_color = 1;
		break;

	      default:
		break;

	    }
	} else {
	    argv[j++] = argv[i];
	}
    }
    argc = j;

/*======= Initialize GLUT ====================================*/
    glutInit( &argc , argv );
    glutInitDisplayMode( GLUT_RGBA | GLUT_DOUBLE ); /* enable double buffering of video board */

/*======= Initialize window ==================================*/
    glutInitWindowPosition( INIT_WINDOW_POS_X , INIT_WINDOW_POS_Y );	/* initial window position */
    glutInitWindowSize( (int)(zoom_rate*IMAGE_WIDTH_DS) , (int)(zoom_rate*IMAGE_HEIGHT_DS) );	/* set window size */
    glutCreateWindow( window_title );	/* creat window with name */

/*======= Initialize projection ==============================*/
    glOrtho( 0.0 , IMAGE_WIDTH_DS-1.0 , 0.0 , IMAGE_HEIGHT_DS , -1.0 , 1.0 );
    glPixelZoom( zoom_rate , zoom_rate );

/*======= Initilize capture device ============================*/
    ShowVideoInitCaptureDevice( DEFAULT_DEVICE_NAME , video_input );

/*======= Initilize buffer ====================================*/
    glClearColor( 0.0 , 0.0 , 0.0 , 0.0 );
    glClear( GL_COLOR_BUFFER_BIT );
    glutSwapBuffers();
    glFlush();

/*======= Register callback functions =========================*/
    glutDisplayFunc( ShowVideoDisplayImage );
    glutMouseFunc( ShowVideoMouseCheck );
    glutIdleFunc( ShowVideoCaptureImage );	/* global idle callback */

/*======= Begin event loop ====================================*/
    glutMainLoop();

    exit(0);

}