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Sourcecode: libgphoto2 version File versions

info.c

/**********************************************************************
*       Minolta Dimage V digital camera communication library         *
*               Copyright  2000,2001 Gus Hartmann                  *
*                                                                     *
*    This program is free software; you can redistribute it and/or    *
*    modify it under the terms of the GNU General Public License as   *
*    published by the Free Software Foundation; either version 2 of   *
*    the License, or (at your option) any later version.              *
*                                                                     *
*    This program 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 General Public License for more details.                     *
*                                                                     *
*    You should have received a copy of the GNU General Public        *
*    License along with this program; if not, write to the Free       *
*    Software Foundation, Inc., 59 Temple Place, Suite 330,           *
*    Boston, MA 02111-1307 USA                                        *
*                                                                     *
**********************************************************************/

/* $Id: info.c 5969 2002-12-15 11:45:10Z asl $ */

#include "config.h"

#include "dimagev.h"

#define GP_MODULE "dimagev"

/* This is the parent function, who calls most of the functions below.
   It returns GP_ERROR if it cannot get the camera data, and GP_OK otherwise.
   The subroutines will print out more detained information should they fail. */
int dimagev_get_camera_info(dimagev_t *dimagev) {
      dimagev_packet *p, *raw;
      unsigned char char_buffer;

      /* Check the device. */
      if ( dimagev->dev == NULL ) {
            GP_DEBUG( "dimagev_get_camera_info::device not valid");
            return GP_ERROR_BAD_PARAMETERS;
      }

      /* Make sure that the old info struct is fred, and allocate a new one. */
      /*
      if ( dimagev->info != NULL ) {
            free(dimagev->info);
      }
      */

      /* Let's say hello and get the current status. */
      if ( ( p = dimagev_make_packet(DIMAGEV_INQUIRY, 1, 0)) == NULL ) {
            GP_DEBUG( "dimagev_get_camera_info::unable to allocate packet");
            return GP_ERROR_IO;
      }

      if ( gp_port_write(dimagev->dev, p->buffer, p->length) < GP_OK ) {
            GP_DEBUG( "dimagev_get_camera_info::unable to write packet");
            free(p);
            return GP_ERROR_IO;
      } else if ( gp_port_read(dimagev->dev, &char_buffer, 1) < GP_OK ) {
            GP_DEBUG( "dimagev_get_camera_info::no response from camera");
            free(p);
            return GP_ERROR_IO;
      }

      free(p);

      switch ( char_buffer ) {
            case DIMAGEV_ACK:
                  break;
            case DIMAGEV_NAK:
                  /* Keep trying until a CAN is issued. */
                  GP_DEBUG( "dimagev_get_camera_info::camera did not acknowledge transmission");
                  return dimagev_get_camera_info(dimagev);
            case DIMAGEV_CAN:
                  GP_DEBUG( "dimagev_get_camera_info::camera cancels transmission");
                  return GP_ERROR_IO;
            default:
                  GP_DEBUG( "dimagev_get_camera_info::camera responded with unknown value %x", char_buffer);
                  return GP_ERROR_IO;
      }

      if ( ( p = dimagev_read_packet(dimagev) ) == NULL ) {
            GP_DEBUG( "dimagev_get_camera_info::unable to read packet");
            return GP_ERROR_IO;
      }

      char_buffer = DIMAGEV_EOT;
      if ( gp_port_write(dimagev->dev, &char_buffer, 1) < GP_OK ) {
            GP_DEBUG( "dimagev_get_camera_info::unable to send EOT");
            free(p);
            return GP_ERROR_IO;
      }
            
      if ( gp_port_read(dimagev->dev, &char_buffer, 1) < GP_OK ) {
            GP_DEBUG( "dimagev_get_camera_info::no response from camera");
            free(p);
            return GP_ERROR_IO;
      }

      switch ( char_buffer ) {
            case DIMAGEV_ACK:
                  break;
            case DIMAGEV_NAK:
                  GP_DEBUG( "dimagev_get_camera_info::camera did not acknowledge transmission");
                  free(p);
                  return GP_ERROR_IO;
            case DIMAGEV_CAN:
                  GP_DEBUG( "dimagev_get_camera_info::camera cancels transmission");
                  free(p);
                  return GP_ERROR_IO;
            default:
                  GP_DEBUG( "dimagev_get_camera_info::camera responded with unknown value %x", char_buffer);
                  free(p);
                  return GP_ERROR_IO;
      }

      if ( ( raw = dimagev_strip_packet(p) ) == NULL ) {
            GP_DEBUG( "dimagev_get_camera_info::unable to strip data packet");
            free(p);
            return GP_ERROR_NO_MEMORY;
      }

      if ( ( dimagev->info = dimagev_import_camera_info(raw->buffer) ) == NULL ) {
            GP_DEBUG( "dimagev_get_camera_info::unable to read camera info");
            free(p);
            free(raw);
            return GP_ERROR;
      }

      /* Sure it *should* get fred automagically, but why take the risk? */
      free(p);
      free(raw);

      return GP_OK;
}

dimagev_info_t *dimagev_import_camera_info(unsigned char *raw_data) {
      dimagev_info_t *info;

      if ( ( info = malloc(sizeof(dimagev_info_t)) ) == NULL ) {
            perror("dimagev_import_camera_info::unable to allocate dimagev_info_t");
            return NULL;
      }

      memcpy(info->vendor, &(raw_data[0]), 8);
      info->vendor[7]= (unsigned char) 0;
      memcpy(info->model, &(raw_data[8]), 8);
      info->model[7]= (unsigned char) 0;
      memcpy(info->hardware_rev, &(raw_data[16]), 4);
      info->hardware_rev[3]= (unsigned char) 0;
      memcpy(info->firmware_rev, &(raw_data[20]), 4);
      info->firmware_rev[3]= (unsigned char) 0;
      info->have_storage = raw_data[24];

      return info;
}

void dimagev_dump_camera_info(dimagev_info_t *info) {
      if ( info == NULL ) {
            GP_DEBUG( "dimagev_dump_camera_info::unable to read NULL simagev_info_t");
            return;
      }

      GP_DEBUG( "========= Begin Camera Info =========");
      GP_DEBUG( "Vendor: %s", info->vendor);
      GP_DEBUG( "Model: %s", info->model);
      GP_DEBUG( "Hardware Revision: %s", info->hardware_rev);
      GP_DEBUG( "Firmware Revision: %s", info->firmware_rev);
      GP_DEBUG( "========== End Camera Info ==========");

      return;
}

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