Logo Search packages:      
Sourcecode: libgphoto2 version File versions  Download package

autodetect.c

#include <stdio.h>
#include <string.h>

#include <gphoto2/gphoto2-camera.h>

#include "samples.h"

static GPPortInfoList         *portinfolist = NULL;
static CameraAbilitiesList    *abilities = NULL;

/*
 * This detects all currently attached cameras and returns
 * them in a list. It avoids the generic usb: entry.
 *
 * This function does not open nor initialize the cameras yet.
 */
int
sample_autodetect (CameraList *list, GPContext *context) {
      int               ret, i;
      CameraList        *xlist = NULL;

      ret = gp_list_new (&xlist);
      if (ret < GP_OK) goto out;
      if (!portinfolist) {
            /* Load all the port drivers we have... */
            ret = gp_port_info_list_new (&portinfolist);
            if (ret < GP_OK) goto out;
            ret = gp_port_info_list_load (portinfolist);
            if (ret < 0) goto out;
            ret = gp_port_info_list_count (portinfolist);
            if (ret < 0) goto out;
      }
      /* Load all the camera drivers we have... */
      ret = gp_abilities_list_new (&abilities);
      if (ret < GP_OK) goto out;
      ret = gp_abilities_list_load (abilities, context);
      if (ret < GP_OK) goto out;

      /* ... and autodetect the currently attached cameras. */
        ret = gp_abilities_list_detect (abilities, portinfolist, xlist, context);
      if (ret < GP_OK) goto out;

      /* Filter out the "usb:" entry */
        ret = gp_list_count (xlist);
      if (ret < GP_OK) goto out;
      for (i=0;i<ret;i++) {
            const char *name, *value;

            gp_list_get_name (xlist, i, &name);
            gp_list_get_value (xlist, i, &value);
            if (!strcmp ("usb:",value)) continue;
            gp_list_append (list, name, value);
      }
out:
      gp_list_free (xlist);
      return gp_list_count(list);
}

/*
 * This function opens a camera depending on the specified model and port.
 */
int
sample_open_camera (Camera ** camera, const char *model, const char *port) {
      int         ret, m, p;
      CameraAbilities   a;
      GPPortInfo  pi;

      ret = gp_camera_new (camera);
      if (ret < GP_OK) return ret;

      /* First lookup the model / driver */
        m = gp_abilities_list_lookup_model (abilities, model);
      if (m < GP_OK) return ret;
        ret = gp_abilities_list_get_abilities (abilities, m, &a);
      if (ret < GP_OK) return ret;
        ret = gp_camera_set_abilities (*camera, a);
      if (ret < GP_OK) return ret;

      /* Then associate the camera with the specified port */
        p = gp_port_info_list_lookup_path (portinfolist, port);
        if (ret < GP_OK) return ret;
        switch (p) {
        case GP_ERROR_UNKNOWN_PORT:
                fprintf (stderr, "The port you specified "
                        "('%s') can not be found. Please "
                        "specify one of the ports found by "
                        "'gphoto2 --list-ports' and make "
                        "sure the spelling is correct "
                        "(i.e. with prefix 'serial:' or 'usb:').",
                                port);
                break;
        default:
                break;
        }
        if (ret < GP_OK) return ret;
        ret = gp_port_info_list_get_info (portinfolist, p, &pi);
        if (ret < GP_OK) return ret;
        ret = gp_camera_set_port_info (*camera, pi);
        if (ret < GP_OK) return ret;
      return GP_OK;
}

Generated by  Doxygen 1.6.0   Back to index