Current File : //usr/share/doc/libdc1394-devel-2.2.2/grab_partial_pvn.c

/*
 * Grab partial images from camera. Camera must be format 7
 *    (scalable image size) compatible. The images are written
 *    in a PVN file
 *
 * Written by Damien Douxchamps <ddouxchamps@users.sf.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <stdio.h>
#include <stdint.h>
#include <dc1394/dc1394.h>
#include <stdlib.h>
#include <time.h>
#include <inttypes.h>
#include <unistd.h>

#ifdef _WIN32
#define times 0**(int*)
struct tms {int a;};
#else
#include <sys/times.h>
#endif

#define WIDTH  1280
#define HEIGHT 1024

int main(int argn, char *argv[])
{
    FILE* imagefile;
    dc1394camera_t *camera;
    int i;
    unsigned int width, height;
    dc1394video_frame_t *frame=NULL;
    dc1394_t * d;
    dc1394camera_list_t * list;
    dc1394error_t err;

    int nimages;

    if (argn<2) {
        fprintf(stderr,"Usage:\n grab_partial_pvn <number of images>\n");
        exit(1);
    }

    nimages=atoi(argv[1]);

    d = dc1394_new ();
    if (!d)
        return 1;
    err=dc1394_camera_enumerate (d, &list);
    DC1394_ERR_RTN(err,"Failed to enumerate cameras");

    if (list->num == 0) {
        dc1394_log_error("No cameras found");
        return 1;
    }

    camera = dc1394_camera_new (d, list->ids[0].guid);
    if (!camera) {
        dc1394_log_error("Failed to initialize camera with guid %"PRIx64,
                list->ids[0].guid);
        return 1;
    }
    dc1394_camera_free_list (list);

    printf("Using camera with GUID %"PRIx64"\n", camera->guid);

    /*-----------------------------------------------------------------------
     *  setup capture for format 7
     *-----------------------------------------------------------------------*/

    dc1394_video_set_iso_speed(camera, DC1394_ISO_SPEED_400);
    dc1394_video_set_mode(camera, DC1394_VIDEO_MODE_FORMAT7_0);
    err = dc1394_format7_set_roi(camera, DC1394_VIDEO_MODE_FORMAT7_0,
                                 DC1394_COLOR_CODING_MONO8,
                                 DC1394_USE_MAX_AVAIL, // use max packet size
                                 0, 0, // left, top
                                 WIDTH, HEIGHT);  // width, height
    DC1394_ERR_RTN(err,"Unable to set Format7 mode 0.\nEdit the example file manually to fit your camera capabilities");

    err=dc1394_capture_setup(camera, 4, DC1394_CAPTURE_FLAGS_DEFAULT);
    DC1394_ERR_CLN_RTN(err, dc1394_camera_free(camera), "Error capturing");

    /*-----------------------------------------------------------------------
     *  have the camera start sending us data
     *-----------------------------------------------------------------------*/
    err=dc1394_video_set_transmission(camera,DC1394_ON);
    if (err!=DC1394_SUCCESS) {
        dc1394_log_error("unable to start camera iso transmission");
        dc1394_capture_stop(camera);
        dc1394_camera_free(camera);
        exit(1);
    }

    dc1394_get_image_size_from_video_mode(camera, DC1394_VIDEO_MODE_FORMAT7_0, &width, &height);

    //sleep(10);

    imagefile=fopen(argv[1],"wb");
          
    fprintf(imagefile,"PV5a\nWIDTH: %d\nHEIGHT: %d\nMAXVAL: 8\nFRAMERATE: 10\n",WIDTH,HEIGHT);

    for(i=0; i<nimages; ++i) {
      //int k;
      //for (k=0;k<4;k++) { // empty buffer
      //  err=dc1394_capture_dequeue(camera, DC1394_CAPTURE_POLICY_WAIT, &frame);
      //  dc1394_capture_enqueue(camera,frame);
      //}
      /*-----------------------------------------------------------------------
       *  capture one frame
       *-----------------------------------------------------------------------*/
      err=dc1394_capture_dequeue(camera, DC1394_CAPTURE_POLICY_WAIT, &frame);
      if (err!=DC1394_SUCCESS) {
	dc1394_log_error("unable to capture");
	dc1394_capture_stop(camera);
	dc1394_camera_free(camera);
	exit(1);
      }
      
      fwrite(frame->image, 1, height * width, imagefile);
      
      // release buffer
      dc1394_capture_enqueue(camera,frame);
      fprintf(stderr,"Got frame %d\n",i);
    }

      fclose(imagefile);
    /*-----------------------------------------------------------------------
     *  stop data transmission
     *-----------------------------------------------------------------------*/
    err=dc1394_video_set_transmission(camera,DC1394_OFF);
    DC1394_ERR_RTN(err,"couldn't stop the camera?");

    /*-----------------------------------------------------------------------
     *  close camera, cleanup
     *-----------------------------------------------------------------------*/
    dc1394_capture_stop(camera);
    dc1394_video_set_transmission(camera, DC1394_OFF);
    dc1394_camera_free(camera);
    dc1394_free (d);
    return 0;
}