Initial import of sane-backends version 1.0.24-1.2

1 files changed, 2150 insertions, 0 deletions

diff --git a/backend/dc240.c b/backend/dc240.c
new file mode 100644
index 0000000..001a937
--- /dev/null
+++ b/backend/dc240.c
@@ -0,0 +1,2150 @@
+/***************************************************************************
+ * _S_A_N_E - Scanner Access Now Easy.
+
+   dc240.c 
+
+   03/12/01 - Peter Fales
+
+   Based on the dc210 driver, (C) 1998 Brian J. Murrell (which is
+	based on dc25 driver (C) 1998 by Peter Fales)
+	
+   This file (C) 2001 by Peter Fales
+
+   This file is part of the SANE package.
+
+   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.
+
+   As a special exception, the authors of SANE give permission for
+   additional uses of the libraries contained in this release of SANE.
+
+   The exception is that, if you link a SANE library with other files
+   to produce an executable, this does not by itself cause the
+   resulting executable to be covered by the GNU General Public
+   License.  Your use of that executable is in no way restricted on
+   account of linking the SANE library code into it.
+
+   This exception does not, however, invalidate any other reasons why
+   the executable file might be covered by the GNU General Public
+   License.
+
+   If you submit changes to SANE to the maintainers to be included in
+   a subsequent release, you agree by submitting the changes that
+   those changes may be distributed with this exception intact.
+
+   If you write modifications of your own for SANE, it is your choice
+   whether to permit this exception to apply to your modifications.
+   If you do not wish that, delete this exception notice.  
+
+ ***************************************************************************
+
+   This file implements a SANE backend for the Kodak DC-240
+   digital camera.  THIS IS EXTREMELY ALPHA CODE!  USE AT YOUR OWN RISK!! 
+
+   (feedback to:  dc240-devel@fales-lorenz.net)
+
+   This backend is based somewhat on the dc25 backend included in this
+   package by Peter Fales, and the dc210 backend by Brian J. Murrell
+
+ ***************************************************************************/
+
+#include "../include/sane/config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include "../include/sane/sanei_jpeg.h"
+#include <sys/ioctl.h>
+
+#include "../include/sane/sane.h"
+#include "../include/sane/sanei.h"
+#include "../include/sane/saneopts.h"
+
+#define BACKEND_NAME	dc240
+#include "../include/sane/sanei_backend.h"
+
+#include "dc240.h"
+
+#ifndef PATH_MAX
+# define PATH_MAX	1024
+#endif
+
+#define MAGIC			(void *)0xab730324
+#define DC240_CONFIG_FILE 	"dc240.conf"
+#define THUMBSIZE		20736
+
+#ifdef B115200
+# define DEFAULT_BAUD_RATE	B115200
+#else
+# define DEFAULT_BAUD_RATE	B38400
+#endif
+
+#if defined (__sgi)
+# define DEFAULT_TTY		"/dev/ttyd1"	/* Irix */
+#elif defined (__sun)
+# define DEFAULT_TTY		"/dev/term/a"	/* Solaris */
+#elif defined (hpux)
+# define DEFAULT_TTY		"/dev/tty1d0"	/* HP-UX */
+#elif defined (__osf__)
+# define DEFAULT_TTY		"/dev/tty00"	/* Digital UNIX */
+#else
+# define DEFAULT_TTY		"/dev/ttyS0"	/* Linux */
+#endif
+
+static SANE_Bool is_open = 0;
+
+static SANE_Bool dc240_opt_thumbnails;
+static SANE_Bool dc240_opt_snap;
+static SANE_Bool dc240_opt_lowres;
+static SANE_Bool dc240_opt_erase;
+static SANE_Bool dc240_opt_autoinc;
+static SANE_Bool dumpinquiry;
+
+static struct jpeg_decompress_struct cinfo;
+static djpeg_dest_ptr dest_mgr = NULL;
+
+static unsigned long cmdrespause = 250000UL;	/* pause after sending cmd */
+static unsigned long breakpause = 1000000UL;	/* pause after sending break */
+
+static DC240 Camera;
+
+static SANE_Range image_range = {
+  0,
+  0,
+  0
+};
+
+static SANE_String **folder_list;
+static SANE_Int current_folder = 0;
+
+static SANE_Option_Descriptor sod[] = {
+  {
+   SANE_NAME_NUM_OPTIONS,
+   SANE_TITLE_NUM_OPTIONS,
+   SANE_DESC_NUM_OPTIONS,
+   SANE_TYPE_INT,
+   SANE_UNIT_NONE,
+   sizeof (SANE_Word),
+   SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_IMAGE_SELECTION 1
+  {
+   "",
+   "Image Selection",
+   "Selection of the image to load.",
+   SANE_TYPE_GROUP,
+   SANE_UNIT_NONE,
+   0,
+   0,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_FOLDER 2
+  {
+   "folder",
+   "Folder",
+   "Select folder within camera",
+   SANE_TYPE_STRING,
+   SANE_UNIT_NONE,
+   256,
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_STRING_LIST,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_IMAGE_NUMBER 3
+  {
+   "image",
+   "Image Number",
+   "Select Image Number to load from camera",
+   SANE_TYPE_INT,
+   SANE_UNIT_NONE,
+   4,
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_RANGE,
+   {(SANE_String_Const *) & image_range}	/* this is ANSI conformant! */
+   }
+  ,
+
+#define DC240_OPT_THUMBS 4
+  {
+   "thumbs",
+   "Load Thumbnail",
+   "Load the image as thumbnail.",
+   SANE_TYPE_BOOL,
+   SANE_UNIT_NONE,
+   sizeof (SANE_Word),
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+#define DC240_OPT_SNAP 5
+  {
+   "snap",
+   "Snap new picture",
+   "Take new picture and download it",
+   SANE_TYPE_BOOL,
+   SANE_UNIT_NONE,
+   sizeof (SANE_Word),
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT /* | SANE_CAP_ADVANCED */ ,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+#define DC240_OPT_LOWRES 6
+  {
+   "lowres",
+   "Low Resolution",
+   "Resolution of new pictures",
+   SANE_TYPE_BOOL,
+   SANE_UNIT_NONE,
+   sizeof (SANE_Word),
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT | SANE_CAP_INACTIVE
+   /* | SANE_CAP_ADVANCED */ ,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_ERASE 7
+  {
+   "erase",
+   "Erase",
+   "Erase the picture after downloading",
+   SANE_TYPE_BOOL,
+   SANE_UNIT_NONE,
+   sizeof (SANE_Word),
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_DEFAULT 8
+  {
+   "default-enhancements",
+   "Defaults",
+   "Set default values for enhancement controls.",
+   SANE_TYPE_BUTTON,
+   SANE_UNIT_NONE,
+   0,
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_INIT_DC240 9
+  {
+   "camera-init",
+   "Re-establish Communications",
+   "Re-establish communications with camera (in case of timeout, etc.)",
+   SANE_TYPE_BUTTON,
+   SANE_UNIT_NONE,
+   0,
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+#define DC240_OPT_AUTOINC 10
+  {
+   "autoinc",
+   "Auto Increment",
+   "Increment image number after each scan",
+   SANE_TYPE_BOOL,
+   SANE_UNIT_NONE,
+   sizeof (SANE_Word),
+   SANE_CAP_SOFT_SELECT | SANE_CAP_SOFT_DETECT | SANE_CAP_ADVANCED,
+   SANE_CONSTRAINT_NONE,
+   {NULL}
+   }
+  ,
+
+};
+
+static SANE_Parameters parms = {
+  SANE_FRAME_RGB,
+  0,
+  0,				/* Number of bytes returned per scan line: */
+  0,				/* Number of pixels per scan line.  */
+  0,				/* Number of lines for the current scan.  */
+  8,				/* Number of bits per sample. */
+};
+
+
+
+
+static SANE_Byte shoot_pck[] = SHOOT_PCK;
+static SANE_Byte init_pck[] = INIT_PCK;
+static SANE_Byte thumb_pck[] = THUMBS_PCK;
+static SANE_Byte pic_pck[] = PICS_PCK;
+static SANE_Byte pic_info_pck[] = PICS_INFO_PCK;
+static SANE_Byte info_pck[] = INFO_PCK;
+static SANE_Byte erase_pck[] = ERASE_PCK;
+static SANE_Byte res_pck[] = RES_PCK;
+static SANE_Byte open_card_pck[] = OPEN_CARD_PCK;
+static SANE_Byte read_dir_pck[] = READ_DIR_PCK;
+
+static struct pkt_speed speeds[] = SPEEDS;
+static struct termios tty_orig;
+
+SANE_Byte dir_buf2[2 + CAMDIRENTRYSIZE * DIRENTRIES];
+
+static struct cam_dirlist *dir_head = NULL;
+
+static SANE_Byte info_buf[256];
+static SANE_Byte name_buf[60];
+
+#include <sys/time.h>
+#include <unistd.h>
+
+static SANE_Int
+send_pck (SANE_Int fd, SANE_Byte * pck)
+{
+  SANE_Int n;
+  SANE_Byte r = 0xf0;		/* prime the loop with a "camera busy" */
+
+  DBG (127, "send_pck<%x %x %x %x %x %x %x %x>\n",
+       pck[0], pck[1], pck[2], pck[3], pck[4], pck[5], pck[6], pck[7]);
+
+  /* keep trying if camera says it's busy */
+  while (r == 0xf0)
+    {
+      if (write (fd, (char *) pck, 8) != 8)
+	{
+	  DBG (1, "send_pck: error: write returned -1\n");
+	  return -1;
+	}
+      /* need to wait before we read command result */
+      usleep (cmdrespause);
+
+      if ((n = read (fd, (char *) &r, 1)) != 1)
+	{
+	  DBG (1, "send_pck: error: read returned -1\n");
+	  return -1;
+	}
+    }
+  DBG (127, "send_pck: read one byte result from camera =  %x\n", r);
+  return (r == 0xd1) ? 0 : -1;
+}
+
+static SANE_Int
+init_dc240 (DC240 * camera)
+{
+  struct termios tty_new;
+  SANE_Int speed_index;
+  SANE_Char buf[5], n;
+
+  DBG (1, "DC-240 Backend 05/16/01\n");
+
+  for (speed_index = 0; speed_index < NELEMS (speeds); speed_index++)
+    {
+      if (speeds[speed_index].baud == camera->baud)
+	{
+	  init_pck[2] = speeds[speed_index].pkt_code[0];
+	  init_pck[3] = speeds[speed_index].pkt_code[1];
+	  break;
+	}
+    }
+
+  if (init_pck[2] == 0)
+    {
+      DBG (1, "unsupported baud rate.\n");
+      return -1;
+    }
+
+  /*
+     Open device file.
+   */
+  if ((camera->fd = open (camera->tty_name, O_RDWR)) == -1)
+    {
+      DBG (1, "init_dc240: error: could not open %s for read/write\n",
+	   camera->tty_name);
+      return -1;
+    }
+  /*
+     Save old device information to restore when we are done.
+   */
+  if (tcgetattr (camera->fd, &tty_orig) == -1)
+    {
+      DBG (1, "init_dc240: error: could not get attributes\n");
+      return -1;
+    }
+
+  memcpy ((char *) &tty_new, (char *) &tty_orig, sizeof (struct termios));
+  /*
+     We need the device to be raw. 8 bits even parity on 9600 baud to start.
+   */
+#ifdef HAVE_CFMAKERAW
+  cfmakeraw (&tty_new);
+#else
+  /* Modified to set the port REALLY as required (9600, 8b, 1sb, NO parity).
+     Code inspired by the gPhoto2 serial port setup */
+
+  /* input control settings */
+  tty_new.c_iflag &= ~(IGNBRK | IGNCR | INLCR | ICRNL | IUCLC |
+                      IXANY | IXON | IXOFF | INPCK | ISTRIP);
+  tty_new.c_iflag |= (BRKINT | IGNPAR);
+  /* output control settings */
+  tty_new.c_oflag &= ~OPOST;
+  /* hardware control settings */
+  tty_new.c_cflag = (tty_new.c_cflag & ~CSIZE) | CS8;
+  tty_new.c_cflag &= ~(PARENB | PARODD | CSTOPB);
+# if defined(__sgi)
+  tty_new.c_cflag &= ~CNEW_RTSCTS;
+# else
+/* OS/2 doesn't have CRTSCTS - will this work for them? */
+#  ifdef CRTSCTS
+  tty_new.c_cflag &= ~CRTSCTS;
+#  endif
+# endif
+  tty_new.c_cflag |= CLOCAL | CREAD;
+#endif
+  /* line discipline settings */
+  tty_new.c_lflag &= ~(ICANON | ISIG | ECHO | ECHONL | ECHOE |
+                       ECHOK | IEXTEN);
+  tty_new.c_cc[VMIN] = 0;
+  tty_new.c_cc[VTIME] = 5;
+  cfsetospeed (&tty_new, B9600);
+  cfsetispeed (&tty_new, B9600);
+
+  if (tcsetattr (camera->fd, TCSANOW, &tty_new) == -1)
+    {
+      DBG (1, "init_dc240: error: could not set attributes\n");
+      return -1;
+    }
+
+  /* send a break to get it back to a known state */
+  /* Used to supply a non-zero argument to tcsendbreak(), TCSBRK, 
+   * and TCSBRKP, but that is system dependent.  e.g. on irix a non-zero
+   * value does a drain instead of a break.  A zero value is universally
+   * used to send a break.
+   */
+
+#ifdef HAVE_TCSENDBREAK
+  tcsendbreak (camera->fd, 0);
+# if defined(__sgi)
+  tcdrain (camera->fd);
+# endif
+# elif defined(TCSBRKP)
+  ioctl (camera->fd, TCSBRKP, 0);
+# elif defined(TCSBRK)
+  ioctl (camera->fd, TCSBRK, 0);
+#endif
+
+  /* and wait for it to recover from the break */
+
+#ifdef HAVE_USLEEP
+  usleep (breakpause);
+#else
+  sleep (1);
+#endif
+
+  /* We seem to get some garbage following the break, so 
+   * read anything pending */
+
+  n = read (camera->fd, buf, 5);
+
+  DBG (127, "init_dc240 flushed %d bytes: %x %x %x %x %x\n", n, buf[0],
+       buf[1], buf[2], buf[3], buf[4]);
+
+  if (send_pck (camera->fd, init_pck) == -1)
+    {
+      /*
+       *    The camera always powers up at 9600, so we try 
+       *      that first.  However, it may be already set to 
+       *      a different speed.  Try the entries in the table:
+       */
+
+      tcsetattr (camera->fd, TCSANOW, &tty_orig);
+      DBG (1, "init_dc240: error: no response from camera\n");
+      return -1;
+    }
+
+  n = read (camera->fd, buf, 5);
+  DBG (127, "init_dc240 flushed %d bytes: %x %x %x %x %x\n", n, buf[0],
+       buf[1], buf[2], buf[3], buf[4]);
+
+  /*
+     Set speed to requested speed. 
+   */
+  cfsetospeed (&tty_new, Camera.baud);
+  cfsetispeed (&tty_new, Camera.baud);
+
+  if (tcsetattr (camera->fd, TCSANOW, &tty_new) == -1)
+    {
+      DBG (1, "init_dc240: error: could not set attributes\n");
+      return -1;
+    }
+
+
+  if (send_pck (camera->fd, open_card_pck) == -1)
+    {
+      DBG (1, "init_dc240: error: send_pck returned -1\n");
+      return -1;
+    }
+
+  if (end_of_data (camera->fd) == -1)
+    {
+      DBG (1, "init_dc240: error: end_of_data returned -1\n");
+      return -1;
+    }
+
+  return camera->fd;
+
+}
+
+static void
+close_dc240 (SANE_Int fd)
+{
+  /*
+   *    Put the camera back to 9600 baud
+   */
+
+  if (close (fd) == -1)
+    {
+      DBG (1, "close_dc240: error: could not close device\n");
+    }
+}
+
+int
+get_info (DC240 * camera)
+{
+
+  SANE_Char f[] = "get_info";
+  SANE_Byte buf[256];
+  SANE_Int n;
+  struct cam_dirlist *e;
+
+  if (send_pck (camera->fd, info_pck) == -1)
+    {
+      DBG (1, "%s: error: send_pck returned -1\n", f);
+      return -1;
+    }
+
+  DBG (9, "%s: read info packet\n", f);
+
+  if (read_data (camera->fd, buf, 256) == -1)
+    {
+      DBG (1, "%s: error: read_data returned -1\n", f);
+      return -1;
+    }
+
+  if (end_of_data (camera->fd) == -1)
+    {
+      DBG (1, "%s: error: end_of_data returned -1\n", f);
+      return -1;
+    }
+
+  camera->model = buf[1];
+
+  if (camera->model != 0x5)
+    {
+      DBG (0,
+	   "Camera model (%d) is not DC-240 (5).  "
+	   "Only the DC-240 is supported by this driver.\n", camera->model);
+    }
+
+  camera->ver_major = buf[2];
+  camera->ver_minor = buf[3];
+  camera->pic_taken = buf[14] << 8 | buf[15];
+  DBG (4, "pic_taken=%d\n", camera->pic_taken);
+  camera->pic_left = buf[64] << 8 | buf[65];
+  DBG (4, "pictures left (at current res)=%d\n", camera->pic_left);
+  camera->flags.low_batt = buf[8];
+  DBG (4, "battery=%d (0=OK, 1=weak, 2=empty)\n", camera->flags.low_batt);
+  DBG (4, "AC adapter status=%d\n", buf[9]);
+  dc240_opt_lowres = !buf[79];
+
+  if (Camera.pic_taken == 0)
+    {
+      sod[DC240_OPT_IMAGE_NUMBER].cap |= SANE_CAP_INACTIVE;
+      image_range.min = 0;
+      image_range.max = 0;
+    }
+  else
+    {
+      sod[DC240_OPT_IMAGE_NUMBER].cap &= ~SANE_CAP_INACTIVE;
+      image_range.min = 1;
+      image_range.max = Camera.pic_taken;
+    }
+
+  n = read_dir ("\\PCCARD\\DCIM\\*.*");
+
+  /* If we've already got a folder_list, free it up before starting
+   * the new one 
+   */
+  if (folder_list != NULL)
+    {
+      int tmp;
+      for (tmp = 0; folder_list[tmp]; tmp++)
+	{
+	  free (folder_list[tmp]);
+	}
+      free (folder_list);
+    }
+
+  folder_list = (SANE_String * *)malloc ((n + 1) * sizeof (SANE_String *));
+  for (e = dir_head, n = 0; e; e = e->next, n++)
+    {
+      folder_list[n] = (SANE_String *) strdup (e->name);
+      if (strchr ((char *) folder_list[n], ' '))
+	{
+	  *strchr ((char *) folder_list[n], ' ') = '\0';
+	}
+    }
+  folder_list[n] = NULL;
+  sod[DC240_OPT_FOLDER].constraint.string_list =
+    (SANE_String_Const *) folder_list;
+
+  return 0;
+
+}
+
+/* NEW */
+static SANE_Int
+read_data (SANE_Int fd, SANE_Byte * buf, SANE_Int sz)
+{
+  SANE_Byte ccsum;
+  SANE_Byte rcsum;
+  SANE_Byte c;
+  SANE_Int retries = 0;
+  SANE_Int n;
+  SANE_Int r = 0;
+  SANE_Int i;
+
+  while (retries++ < 5)
+    {
+
+      /*
+       * If this is not the first time through, then it must be
+       * a retry - signal the camera that we didn't like what
+       * we got.  In either case, start filling the packet
+       */
+      if (retries != 1)
+	{
+
+	  DBG (2, "Attempt retry %d\n", retries);
+	  c = 0xe3;
+	  if (write (fd, (char *) &c, 1) != 1)
+	    {
+	      DBG (1, "read_data: error: write ack\n");
+	      return -1;
+	    }
+
+	}
+
+      /* read the control byte */
+      if (read (fd, &c, 1) != 1)
+	{
+	  DBG (3,
+	       "read_data: error: "
+	       "read for packet control byte returned bad stat!us\n");
+	  return -1;
+	}
+      if (c != 1 && c != 0)
+	{
+	  DBG (1, "read_data: error: incorrect packet control byte: %02x\n",
+	       c);
+	  return -1;
+	}
+
+      for (n = 0; n < sz && (r = read (fd, (char *) &buf[n], sz - n)) > 0;
+	   n += r);
+
+      if (r <= 0)
+	{
+	  DBG (2, "read_data: warning: read returned -1\n");
+	  continue;
+	}
+
+      if (n < sz || read (fd, &rcsum, 1) != 1)
+	{
+	  DBG (2, "read_data: warning: buffer underrun or no checksum\n");
+	  continue;
+	}
+
+      for (i = 0, ccsum = 0; i < n; i++)
+	ccsum ^= buf[i];
+
+      if (ccsum != rcsum)
+	{
+	  DBG (2,
+	       "read_data: warning: "
+	       "bad checksum (got %02x != expected %02x)\n", rcsum, ccsum);
+	  continue;
+	}
+
+      /* If we got this far, then the packet is OK */
+      break;
+
+
+    }
+
+  c = 0xd2;
+
+  if (write (fd, (char *) &c, 1) != 1)
+    {
+      DBG (1, "read_data: error: write ack\n");
+      return -1;
+    }
+
+  return 0;
+}
+
+static SANE_Int
+end_of_data (SANE_Int fd)
+{
+  SANE_Int n;
+  SANE_Byte c;
+
+  do
+    {				/* loop until the camera isn't busy */
+      if ((n = read (fd, &c, 1)) == -1)
+	{
+	  DBG (1, "end_of_data: error: read returned -1\n");
+	  return -1;
+	}
+      if (n == 1 && c == 0)	/* got successful end of data */
+	return 0;		/* return success */
+      if (n == 1)
+	{
+	  DBG (127, "end_of_data: got %x while waiting\n", c);
+	}
+      else
+	{
+	  DBG (127, "end_of_data: waiting...\n");
+	}
+      sleep (1);		/* not too fast */
+    }
+/* It's not documented, but we see a d1 after snapping a picture */
+  while (c == 0xf0 || c == 0xd1);
+
+  /* Accck!  Not busy, but not a good end of data either */
+  if (c != 0)
+    {
+      DBG (1, "end_of_data: error: bad EOD from camera (%02x)\n",
+	   (unsigned) c);
+      return -1;
+    }
+  return 0;			/* should never get here but shut gcc -Wall up */
+}
+
+static SANE_Int
+erase (SANE_Int fd)
+{
+  if (send_pck (fd, erase_pck) == -1)
+    {
+      DBG (1, "erase: error: send_pck returned -1\n");
+      return -1;
+    }
+
+  if (send_data (name_buf) == -1)
+    {
+      DBG (1, "erase: error: send_data returned -1\n");
+      return SANE_STATUS_INVAL;
+    }
+
+  if (end_of_data (fd) == -1)
+    {
+      DBG (1, "erase: error: end_of_data returned -1\n");
+      return -1;
+    }
+
+  return 0;
+}
+
+static SANE_Int
+change_res (SANE_Int fd, SANE_Byte res)
+{
+  SANE_Char f[] = "change_res";
+
+  DBG (127, "%s called, low_res=%d\n", f, res);
+
+  if (res != 0 && res != 1)
+    {
+      DBG (1, "%s: error: unsupported resolution\n", f);
+      return -1;
+    }
+
+  /* cameras resolution semantics are opposite of ours */
+  res = !res;
+  DBG (127, "%s: setting res to %d\n", f, res);
+  res_pck[2] = res;
+
+  if (send_pck (fd, res_pck) == -1)
+    {
+      DBG (1, "%s: error: send_pck returned -1\n", f);
+    }
+
+  if (end_of_data (fd) == -1)
+    {
+      DBG (1, "%s: error: end_of_data returned -1\n", f);
+    }
+  return 0;
+}
+
+SANE_Status
+sane_init (SANE_Int * version_code, SANE_Auth_Callback UNUSEDARG authorize)
+{
+
+  SANE_Char f[] = "sane_init";
+  SANE_Char dev_name[PATH_MAX], *p;
+  size_t len;
+  FILE *fp;
+  SANE_Int baud;
+
+  DBG_INIT ();
+
+  if (version_code)
+    *version_code = SANE_VERSION_CODE (SANE_CURRENT_MAJOR, V_MINOR, 0);
+
+  fp = sanei_config_open (DC240_CONFIG_FILE);
+
+  /* defaults */
+  Camera.baud = DEFAULT_BAUD_RATE;
+  Camera.tty_name = DEFAULT_TTY;
+
+  if (!fp)
+    {
+      /* default to /dev/whatever instead of insisting on config file */
+      DBG (1, "%s:  missing config file '%s'\n", f, DC240_CONFIG_FILE);
+    }
+  else
+    {
+      while (sanei_config_read (dev_name, sizeof (dev_name), fp))
+	{
+	  dev_name[sizeof (dev_name) - 1] = '\0';
+	  DBG (20, "%s:  config- %s\n", f, dev_name);
+
+	  if (dev_name[0] == '#')
+	    continue;		/* ignore line comments */
+	  len = strlen (dev_name);
+	  if (!len)
+	    continue;		/* ignore empty lines */
+	  if (strncmp (dev_name, "port=", 5) == 0)
+	    {
+	      p = strchr (dev_name, '/');
+	      if (p)
+		Camera.tty_name = strdup (p);
+	      DBG (20, "Config file port=%s\n", Camera.tty_name);
+	    }
+	  else if (strncmp (dev_name, "baud=", 5) == 0)
+	    {
+	      baud = atoi (&dev_name[5]);
+	      switch (baud)
+		{
+		case 9600:
+		  Camera.baud = B9600;
+		  break;
+		case 19200:
+		  Camera.baud = B19200;
+		  break;
+		case 38400:
+		  Camera.baud = B38400;
+		  break;
+#ifdef B57600
+		case 57600:
+		  Camera.baud = B57600;
+		  break;
+#endif
+#ifdef B115200
+		case 115200:
+		  Camera.baud = B115200;
+		  break;
+#endif
+		}
+	      DBG (20, "Config file baud=%d\n", Camera.baud);
+	    }
+	  else if (strcmp (dev_name, "dumpinquiry") == 0)
+	    {
+	      dumpinquiry = SANE_TRUE;
+	    }
+	  else if (strncmp (dev_name, "cmdrespause=", 12) == 0)
+	    {
+	      cmdrespause = atoi (&dev_name[12]);
+	      DBG (20, "Config file cmdrespause=%lu\n", cmdrespause);
+	    }
+	  else if (strncmp (dev_name, "breakpause=", 11) == 0)
+	    {
+	      breakpause = atoi (&dev_name[11]);
+	      DBG (20, "Config file breakpause=%lu\n", breakpause);
+	    }
+	}
+      fclose (fp);
+    }
+
+  if (init_dc240 (&Camera) == -1)
+    return SANE_STATUS_INVAL;
+
+  if (get_info (&Camera) == -1)
+    {
+      DBG (1, "error: could not get info\n");
+      close_dc240 (Camera.fd);
+      return SANE_STATUS_INVAL;
+    }
+
+  /* load the current images array */
+  get_pictures_info ();
+
+  if (Camera.pic_taken == 0)
+    {
+      Camera.current_picture_number = 0;
+      parms.bytes_per_line = 0;
+      parms.pixels_per_line = 0;
+      parms.lines = 0;
+    }
+  else
+    {
+      Camera.current_picture_number = 1;
+      set_res (Camera.Pictures[Camera.current_picture_number - 1].low_res);
+    }
+
+  if (dumpinquiry)
+    {
+      DBG (0, "\nCamera information:\n~~~~~~~~~~~~~~~~~\n\n");
+      DBG (0, "Model...........: DC%s\n", "240");
+      DBG (0, "Firmware version: %d.%d\n", Camera.ver_major,
+	   Camera.ver_minor);
+      DBG (0, "Pictures........: %d/%d\n", Camera.pic_taken,
+	   Camera.pic_taken + Camera.pic_left);
+      DBG (0, "Battery state...: %s\n",
+	   Camera.flags.low_batt == 0 ? "good" : (Camera.flags.low_batt ==
+						  1 ? "weak" : "empty"));
+    }
+
+  return SANE_STATUS_GOOD;
+}
+
+void
+sane_exit (void)
+{
+}
+
+/* Device select/open/close */
+
+static const SANE_Device dev[] = {
+  {
+   "0",
+   "Kodak",
+   "DC-240",
+   "still camera"},
+};
+
+static const SANE_Device *devlist[] = {
+  dev + 0, 0
+};
+
+SANE_Status
+sane_get_devices (const SANE_Device *** device_list, SANE_Bool
+		  UNUSEDARG local_only)
+{
+
+  DBG (127, "sane_get_devices called\n");
+
+  *device_list = devlist;
+  return SANE_STATUS_GOOD;
+}
+
+SANE_Status
+sane_open (SANE_String_Const devicename, SANE_Handle * handle)
+{
+  SANE_Int i;
+
+  DBG (127, "sane_open for device %s\n", devicename);
+  if (!devicename[0])
+    {
+      i = 0;
+    }
+  else
+    {
+      for (i = 0; i < NELEMS (dev); ++i)
+	{
+	  if (strcmp (devicename, dev[i].name) == 0)
+	    {
+	      break;
+	    }
+	}
+    }
+
+  if (i >= NELEMS (dev))
+    {
+      return SANE_STATUS_INVAL;
+    }
+
+  if (is_open)
+    {
+      return SANE_STATUS_DEVICE_BUSY;
+    }
+
+  is_open = 1;
+  *handle = MAGIC;
+
+  DBG (4, "sane_open: pictures taken=%d\n", Camera.pic_taken);
+
+  return SANE_STATUS_GOOD;
+}
+
+void
+sane_close (SANE_Handle handle)
+{
+  DBG (127, "sane_close called\n");
+  if (handle == MAGIC)
+    is_open = 0;
+
+  DBG (127, "sane_close returning\n");
+}
+
+const SANE_Option_Descriptor *
+sane_get_option_descriptor (SANE_Handle handle, SANE_Int option)
+{
+  if (handle != MAGIC || !is_open)
+    return NULL;		/* wrong device */
+  if (option < 0 || option >= NELEMS (sod))
+    return NULL;
+  return &sod[option];
+}
+
+static SANE_Int myinfo = 0;
+
+SANE_Status
+sane_control_option (SANE_Handle handle, SANE_Int option,
+		     SANE_Action action, void *value, SANE_Int * info)
+{
+  SANE_Status status;
+
+  if (option < 0 || option >= NELEMS (sod))
+    return SANE_STATUS_INVAL;	/* Unknown option ... */
+
+  /* Need to put this DBG line after the range check on option */
+  DBG (127, "control_option(handle=%p,opt=%s,act=%s,val=%p,info=%p)\n",
+       handle, sod[option].title,
+       (action ==
+	SANE_ACTION_SET_VALUE ? "SET" : (action ==
+					 SANE_ACTION_GET_VALUE ? "GET" :
+					 "SETAUTO")), value, (void *) info);
+
+  if (handle != MAGIC || !is_open)
+    return SANE_STATUS_INVAL;	/* Unknown handle ... */
+
+  switch (action)
+    {
+    case SANE_ACTION_SET_VALUE:
+
+      /* Can't set disabled options */
+      if (!SANE_OPTION_IS_ACTIVE (sod[option].cap))
+	{
+	  return (SANE_STATUS_INVAL);
+	}
+
+      /* initialize info to zero - we'll OR in various values later */
+      if (info)
+	*info = 0;
+
+      status = sanei_constrain_value (sod + option, value, &myinfo);
+      if (status != SANE_STATUS_GOOD)
+	{
+	  DBG (2, "Constraint error in control_option\n");
+	  return status;
+	}
+
+      switch (option)
+	{
+	case DC240_OPT_IMAGE_NUMBER:
+	  if (*(SANE_Word *) value <= Camera.pic_taken)
+	    Camera.current_picture_number = *(SANE_Word *) value;
+	  else
+	    Camera.current_picture_number = Camera.pic_taken;
+
+	  myinfo |= SANE_INFO_RELOAD_PARAMS;
+
+	  /* get the image's resolution, unless the camera has no 
+	   * pictures yet 
+	   */
+	  if (Camera.pic_taken != 0)
+	    {
+	      set_res (Camera.
+		       Pictures[Camera.current_picture_number - 1].low_res);
+	    }
+	  break;
+
+	case DC240_OPT_THUMBS:
+	  dc240_opt_thumbnails = !!*(SANE_Word *) value;
+
+	  /* Thumbnail forces an image size change: */
+	  myinfo |= SANE_INFO_RELOAD_PARAMS;
+
+	  if (Camera.pic_taken != 0)
+	    {
+	      set_res (Camera.
+		       Pictures[Camera.current_picture_number - 1].low_res);
+	    }
+	  break;
+
+	case DC240_OPT_SNAP:
+	  switch (*(SANE_Bool *) value)
+	    {
+	    case SANE_TRUE:
+	      dc240_opt_snap = SANE_TRUE;
+	      break;
+	    case SANE_FALSE:
+	      dc240_opt_snap = SANE_FALSE;
+	      break;
+	    default:
+	      return SANE_STATUS_INVAL;
+	    }
+
+	  /* Snap forces new image size and changes image range */
+
+	  myinfo |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS;
+	  /* if we are snapping a new one */
+	  if (dc240_opt_snap)
+	    {
+	      /* activate the resolution setting */
+	      sod[DC240_OPT_LOWRES].cap &= ~SANE_CAP_INACTIVE;
+	      /* and de-activate the image number selector */
+	      sod[DC240_OPT_IMAGE_NUMBER].cap |= SANE_CAP_INACTIVE;
+	    }
+	  else
+	    {
+	      /* deactivate the resolution setting */
+	      sod[DC240_OPT_LOWRES].cap |= SANE_CAP_INACTIVE;
+	      /* and activate the image number selector */
+	      sod[DC240_OPT_IMAGE_NUMBER].cap &= ~SANE_CAP_INACTIVE;
+	    }
+	  /* set params according to resolution settings */
+	  set_res (dc240_opt_lowres);
+
+	  break;
+
+	case DC240_OPT_LOWRES:
+	  dc240_opt_lowres = !!*(SANE_Word *) value;
+	  myinfo |= SANE_INFO_RELOAD_PARAMS;
+
+/* XXX - change the number of pictures left depending on resolution
+   perhaps just call get_info again?
+*/
+	  set_res (dc240_opt_lowres);
+
+	  break;
+
+	case DC240_OPT_ERASE:
+	  dc240_opt_erase = !!*(SANE_Word *) value;
+	  break;
+
+	case DC240_OPT_AUTOINC:
+	  dc240_opt_autoinc = !!*(SANE_Word *) value;
+	  break;
+
+	case DC240_OPT_FOLDER:
+	  DBG (1, "FIXME set folder not implemented yet\n");
+	  break;
+
+	case DC240_OPT_DEFAULT:
+	  dc240_opt_thumbnails = 0;
+	  dc240_opt_snap = 0;
+
+	  /* deactivate the resolution setting */
+	  sod[DC240_OPT_LOWRES].cap |= SANE_CAP_INACTIVE;
+	  /* and activate the image number selector */
+	  sod[DC240_OPT_IMAGE_NUMBER].cap &= ~SANE_CAP_INACTIVE;
+
+	  myinfo |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS;
+
+	  DBG (1, "Fixme: Set all defaults here!\n");
+	  break;
+
+	case DC240_OPT_INIT_DC240:
+	  if ((Camera.fd = init_dc240 (&Camera)) == -1)
+	    {
+	      return SANE_STATUS_INVAL;
+	    }
+	  if (get_info (&Camera) == -1)
+	    {
+	      DBG (1, "error: could not get info\n");
+	      close_dc240 (Camera.fd);
+	      return SANE_STATUS_INVAL;
+	    }
+
+	  /* load the current images array */
+	  get_pictures_info ();
+
+	  myinfo |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS;
+	  break;
+
+	default:
+	  return SANE_STATUS_INVAL;
+	}
+      break;
+
+    case SANE_ACTION_GET_VALUE:
+      /* Can't return status for disabled options */
+      if (!SANE_OPTION_IS_ACTIVE (sod[option].cap))
+	{
+	  return (SANE_STATUS_INVAL);
+	}
+
+      switch (option)
+	{
+	case 0:
+	  *(SANE_Word *) value = NELEMS (sod);
+	  break;
+
+	case DC240_OPT_IMAGE_NUMBER:
+	  *(SANE_Word *) value = Camera.current_picture_number;
+	  break;
+
+	case DC240_OPT_THUMBS:
+	  *(SANE_Word *) value = dc240_opt_thumbnails;
+	  break;
+
+	case DC240_OPT_SNAP:
+	  *(SANE_Word *) value = dc240_opt_snap;
+	  break;
+
+	case DC240_OPT_LOWRES:
+	  *(SANE_Word *) value = dc240_opt_lowres;
+	  break;
+
+	case DC240_OPT_ERASE:
+	  *(SANE_Word *) value = dc240_opt_erase;
+	  break;
+
+	case DC240_OPT_AUTOINC:
+	  *(SANE_Word *) value = dc240_opt_autoinc;
+	  break;
+
+	case DC240_OPT_FOLDER:
+	  strcpy ((char *) value, (char *) folder_list[current_folder]);
+	  break;
+
+	default:
+	  return SANE_STATUS_INVAL;
+	}
+      break;
+
+    case SANE_ACTION_SET_AUTO:
+      switch (option)
+	{
+	default:
+	  return SANE_STATUS_UNSUPPORTED;	/* We are DUMB */
+	}
+    }
+
+  if (info && action == SANE_ACTION_SET_VALUE)
+    {
+      *info = myinfo;
+      myinfo = 0;
+    }
+  return SANE_STATUS_GOOD;
+}
+
+SANE_Status
+sane_get_parameters (SANE_Handle handle, SANE_Parameters * params)
+{
+  SANE_Int rc = SANE_STATUS_GOOD;
+
+  DBG (127, "sane_get_params called, wid=%d,height=%d\n",
+       parms.pixels_per_line, parms.lines);
+
+  if (handle != MAGIC || !is_open)
+    rc = SANE_STATUS_INVAL;	/* Unknown handle ... */
+
+  parms.last_frame = SANE_TRUE;	/* Have no idea what this does */
+  *params = parms;
+  DBG (127, "sane_get_params return %d\n", rc);
+  return rc;
+}
+
+typedef struct
+{
+  struct jpeg_source_mgr pub;
+  JOCTET *buffer;
+}
+my_source_mgr;
+typedef my_source_mgr *my_src_ptr;
+
+METHODDEF (void)
+jpeg_init_source (j_decompress_ptr UNUSEDARG cinfo)
+{
+  /* nothing to do */
+}
+
+METHODDEF (boolean) jpeg_fill_input_buffer (j_decompress_ptr cinfo)
+{
+
+  my_src_ptr src = (my_src_ptr) cinfo->src;
+
+  if (read_data (Camera.fd, src->buffer, 512) == -1)
+    {
+      DBG (5, "sane_start: read_data failed\n");
+      src->buffer[0] = (JOCTET) 0xFF;
+      src->buffer[1] = (JOCTET) JPEG_EOI;
+      return FALSE;
+    }
+  src->pub.next_input_byte = src->buffer;
+  src->pub.bytes_in_buffer = 512;
+
+  return TRUE;
+}
+
+METHODDEF (void) jpeg_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
+{
+
+  my_src_ptr src = (my_src_ptr) cinfo->src;
+
+  if (num_bytes > 0)
+    {
+      while (num_bytes > (long) src->pub.bytes_in_buffer)
+	{
+	  num_bytes -= (long) src->pub.bytes_in_buffer;
+	  (void) jpeg_fill_input_buffer (cinfo);
+	}
+    }
+  src->pub.next_input_byte += (size_t) num_bytes;
+  src->pub.bytes_in_buffer -= (size_t) num_bytes;
+}
+
+static SANE_Byte linebuffer[HIGHRES_WIDTH * 3];
+static SANE_Int linebuffer_size = 0;
+static SANE_Int linebuffer_index = 0;
+
+
+METHODDEF (void)
+jpeg_term_source (j_decompress_ptr UNUSEDARG cinfo)
+{
+  /* no work necessary here */
+}
+
+SANE_Status
+sane_start (SANE_Handle handle)
+{
+  SANE_Int i;
+
+  DBG (127, "sane_start called\n");
+  if (handle != MAGIC || !is_open ||
+      (Camera.current_picture_number == 0 && dc240_opt_snap == SANE_FALSE))
+    return SANE_STATUS_INVAL;	/* Unknown handle ... */
+
+  if (Camera.scanning)
+    return SANE_STATUS_EOF;
+
+/*
+ * This shouldn't normally happen, but we allow it as a special case
+ * when batch/autoinc are in effect.  The first illegal picture number
+ * terminates the scan
+ */
+  if (Camera.current_picture_number > Camera.pic_taken)
+    {
+      return SANE_STATUS_INVAL;
+    }
+
+  if (dc240_opt_snap)
+    {
+      /*
+       * Don't allow picture unless there is room in the 
+       * camera.
+       */
+      if (Camera.pic_left == 0)
+	{
+	  DBG (3, "No room to store new picture\n");
+	  return SANE_STATUS_INVAL;
+	}
+
+
+      if (snap_pic (Camera.fd) == SANE_STATUS_INVAL)
+	{
+	  DBG (1, "Failed to snap new picture\n");
+	  return SANE_STATUS_INVAL;
+	}
+    }
+
+  if (dc240_opt_thumbnails)
+    {
+
+      if (send_pck (Camera.fd, thumb_pck) == -1)
+	{
+	  DBG (1, "sane_start: error: send_pck returned -1\n");
+	  return SANE_STATUS_INVAL;
+	}
+
+      /* Picture size should have been set when thumbnails were
+       * selected.  But, check just in case
+       */
+
+      if (parms.pixels_per_line != 160 ||
+	  parms.bytes_per_line != 160 * 3 || parms.lines != 120)
+	{
+	  DBG (1, "sane_start: fixme! thumbnail image size is wrong\n");
+	  return SANE_STATUS_INVAL;
+	}
+    }
+  else
+    {
+      if (send_pck (Camera.fd, pic_pck) == -1)
+	{
+	  DBG (1, "sane_start: error: send_pck returned -1\n");
+	  return SANE_STATUS_INVAL;
+	}
+
+    }
+  {
+    my_src_ptr src;
+
+    struct jpeg_error_mgr jerr;
+    SANE_Int row_stride, n;
+    SANE_Char f[] = "sane_start";
+    SANE_Char path[256];
+    struct cam_dirlist *e;
+    name_buf[0] = 0x80;
+
+    for (n = 1, e = dir_head; e; n++, e = e->next)
+      {
+	if (n == Camera.current_picture_number)
+	  break;
+      }
+
+    strcpy (path, "\\PCCARD\\DCIM\\");
+    strcat (path, (char *) folder_list[current_folder]);
+    strcat (path, "\\");
+    strcat (path, e->name);
+    path[strlen (path) - 3] = '\0';
+    strcat (path, ".JPG");
+
+    DBG (9, "%s: pic to read is %d name is %s\n", f, n, path);
+
+    strcpy ((char *) &name_buf[1], path);
+    for (i = 49; i <= 56; i++)
+      {
+	name_buf[i] = 0xff;
+      }
+
+    if (send_data (name_buf) == -1)
+      {
+	DBG (1, "%s: error: send_data returned -1\n", f);
+	return SANE_STATUS_INVAL;
+      }
+
+    cinfo.err = jpeg_std_error (&jerr);
+    jpeg_create_decompress (&cinfo);
+
+    cinfo.src =
+      (struct jpeg_source_mgr *) (*cinfo.mem->
+				  alloc_small) ((j_common_ptr) & cinfo,
+						JPOOL_PERMANENT,
+						sizeof (my_source_mgr));
+    src = (my_src_ptr) cinfo.src;
+
+    src->buffer = (JOCTET *) (*cinfo.mem->alloc_small) ((j_common_ptr) &
+							cinfo,
+							JPOOL_PERMANENT,
+							1024 *
+							sizeof (JOCTET));
+    src->pub.init_source = jpeg_init_source;
+    src->pub.fill_input_buffer = jpeg_fill_input_buffer;
+    src->pub.skip_input_data = jpeg_skip_input_data;
+    src->pub.resync_to_restart = jpeg_resync_to_restart;	/* default */
+    src->pub.term_source = jpeg_term_source;
+    src->pub.bytes_in_buffer = 0;
+    src->pub.next_input_byte = NULL;
+
+    (void) jpeg_read_header (&cinfo, TRUE);
+    dest_mgr = sanei_jpeg_jinit_write_ppm (&cinfo);
+    (void) jpeg_start_decompress (&cinfo);
+    row_stride = cinfo.output_width * cinfo.output_components;
+
+    linebuffer_size = 0;
+    linebuffer_index = 0;
+  }
+
+  Camera.scanning = SANE_TRUE;	/* don't overlap scan requests */
+
+  return SANE_STATUS_GOOD;
+}
+
+SANE_Status
+sane_read (SANE_Handle UNUSEDARG handle, SANE_Byte * data,
+	   SANE_Int max_length, SANE_Int * length)
+{
+  SANE_Int lines = 0;
+  SANE_Char filename_buf[256];
+
+  if (Camera.scanning == SANE_FALSE)
+    {
+      return SANE_STATUS_INVAL;
+    }
+
+  /* If there is anything in the buffer, satisfy the read from there */
+  if (linebuffer_size && linebuffer_index < linebuffer_size)
+    {
+      *length = linebuffer_size - linebuffer_index;
+
+      if (*length > max_length)
+	{
+	  *length = max_length;
+	}
+      memcpy (data, linebuffer + linebuffer_index, *length);
+      linebuffer_index += *length;
+
+      return SANE_STATUS_GOOD;
+    }
+
+  if (cinfo.output_scanline >= cinfo.output_height)
+    {
+      *length = 0;
+
+      /* clean up comms with the camera */
+      if (end_of_data (Camera.fd) == -1)
+	{
+	  DBG (1, "sane_read: error: end_of_data returned -1\n");
+	  return SANE_STATUS_INVAL;
+	}
+      if (dc240_opt_erase)
+	{
+	  DBG (127, "sane_read bp%d, erase image\n", __LINE__);
+	  if (erase (Camera.fd) == -1)
+	    {
+	      DBG (1, "Failed to erase memory\n");
+	      return SANE_STATUS_INVAL;
+	    }
+	  Camera.pic_taken--;
+	  Camera.pic_left++;
+	  Camera.current_picture_number = Camera.pic_taken;
+	  image_range.max--;
+
+	  myinfo |= SANE_INFO_RELOAD_OPTIONS | SANE_INFO_RELOAD_PARAMS;
+	  strcpy ((char *) filename_buf,
+		  strrchr ((char *) name_buf + 1, '\\') + 1);
+	  strcpy (strrchr ((char *) filename_buf, '.'), "JPG");
+	  dir_delete ((SANE_String) filename_buf);
+
+	}
+      if (dc240_opt_autoinc)
+	{
+	  if (Camera.current_picture_number <= Camera.pic_taken)
+	    {
+	      Camera.current_picture_number++;
+
+	      myinfo |= SANE_INFO_RELOAD_PARAMS;
+
+	      /* get the image's resolution */
+	      set_res (Camera.Pictures[Camera.current_picture_number - 1].
+		       low_res);
+	    }
+	  DBG (4, "Increment count to %d (total %d)\n",
+	       Camera.current_picture_number, Camera.pic_taken);
+	}
+      return SANE_STATUS_EOF;
+    }
+
+/* XXX - we should read more than 1 line at a time here */
+  lines = 1;
+  (void) jpeg_read_scanlines (&cinfo, dest_mgr->buffer, lines);
+  (*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, lines, (char *) linebuffer);
+
+  *length = cinfo.output_width * cinfo.output_components * lines;
+  linebuffer_size = *length;
+  linebuffer_index = 0;
+
+  if (*length > max_length)
+    {
+      *length = max_length;
+    }
+  memcpy (data, linebuffer + linebuffer_index, *length);
+  linebuffer_index += *length;
+
+  return SANE_STATUS_GOOD;
+}
+
+void
+sane_cancel (SANE_Handle UNUSEDARG handle)
+{
+  unsigned char cancel_byte[] = { 0xe4 };
+
+  if (Camera.scanning)
+    {
+
+      /* Flush any pending data from the camera before continuing */
+      {
+	SANE_Int n;
+	SANE_Char flush[1024];
+	do
+	  {
+	    sleep (1);
+	    n = read (Camera.fd, flush, 1024);
+	    if (n > 0)
+	      {
+		DBG (127, "%s: flushed %d bytes\n", "sane_cancel", n);
+	      }
+	    else
+	      {
+		DBG (127, "%s: nothing to flush\n", "sane_cancel");
+	      }
+	  }
+	while (n > 0);
+      }
+
+      if (cinfo.output_scanline < cinfo.output_height)
+	{
+	  write (Camera.fd, cancel_byte, 1);
+	}
+
+      Camera.scanning = SANE_FALSE;	/* done with scan */
+    }
+  else
+    DBG (4, "sane_cancel: not scanning - nothing to do\n");
+}
+
+SANE_Status
+sane_set_io_mode (SANE_Handle UNUSEDARG handle, SANE_Bool
+		  UNUSEDARG non_blocking)
+{
+  /* sane_set_io_mode() is only valid during a scan */
+  if (Camera.scanning)
+    {
+      if (non_blocking == SANE_FALSE)
+	{
+	  return SANE_STATUS_GOOD;
+	}
+      else
+	{
+	  return SANE_STATUS_UNSUPPORTED;
+	}
+    }
+  else
+    {
+      /* We aren't currently scanning */
+      return SANE_STATUS_INVAL;
+    }
+}
+
+SANE_Status
+sane_get_select_fd (SANE_Handle UNUSEDARG handle, SANE_Int * UNUSEDARG fd)
+{
+  return SANE_STATUS_UNSUPPORTED;
+}
+
+/*
+ * get_pictures_info - load information about all pictures currently in
+ *			camera:  Mainly the mapping of picture number
+ *			to picture name, and the resolution of each picture.
+ */
+static PictureInfo *
+get_pictures_info (void)
+{
+  SANE_Char f[] = "get_pictures_info";
+  SANE_Char path[256];
+  SANE_Int num_pictures;
+  SANE_Int p;
+  PictureInfo *pics;
+
+  if (Camera.Pictures)
+    {
+      free (Camera.Pictures);
+      Camera.Pictures = NULL;
+    }
+
+  strcpy (path, "\\PCCARD\\DCIM\\");
+  strcat (path, (char *) folder_list[current_folder]);
+  strcat (path, "\\*.*");
+
+  num_pictures = read_dir (path);
+  if (num_pictures != Camera.pic_taken)
+    {
+      DBG (2,
+	   "%s: warning: Number of pictures in directory (%d) doesn't match camera status table (%d).  Using directory count\n",
+	   f, num_pictures, Camera.pic_taken);
+      Camera.pic_taken = num_pictures;
+      image_range.max = num_pictures;
+    }
+
+  if ((pics = (PictureInfo *) malloc (Camera.pic_taken *
+				      sizeof (PictureInfo))) == NULL)
+    {
+      DBG (1, "%s: error: allocate memory for pictures array\n", f);
+      return NULL;
+    }
+
+  for (p = 0; p < Camera.pic_taken; p++)
+    {
+      if (get_picture_info (pics + p, p) == -1)
+	{
+	  free (pics);
+	  return NULL;
+	}
+    }
+
+  Camera.Pictures = pics;
+  return pics;
+}
+
+static SANE_Int
+get_picture_info (PictureInfo * pic, SANE_Int p)
+{
+
+  SANE_Char f[] = "get_picture_info";
+  SANE_Int n;
+  struct cam_dirlist *e;
+
+  DBG (4, "%s: info for pic #%d\n", f, p);
+
+  for (n = 0, e = dir_head; e && n < p; n++, e = e->next)
+    ;
+
+  DBG (4, "Name is %s\n", e->name);
+
+  read_info (e->name);
+
+  /* Validate picture info 
+   * byte 0 - 1 == picture info
+   * byte 1 - 5 == DC240 Camera
+   * byte 2 - 3 == JFIF file
+   * byte 6 - 0 == Image is complete
+   */
+  if (info_buf[0] != 1 || info_buf[1] != 5 || info_buf[2] != 3
+      || info_buf[6] != 0)
+    {
+
+      DBG (1, "%s: error: Image %s does not come from a DC-240.\n", f,
+	   e->name);
+      return -1;
+    }
+
+  pic->low_res = info_buf[3] == 0 ? SANE_TRUE : SANE_FALSE;
+
+  /* 
+   * byte 12 - Year MSB
+   * byte 13 - Year LSB
+   * byte 14 - Month
+   * byte 15 - Day
+   * byte 16 - Hour
+   * byte 17 - Minute
+   * byte 18 - Second
+   */
+  DBG (1, "Picture %d taken %02d/%02d/%02d %02d:%02d:%02d\n",
+       p, info_buf[14],
+       info_buf[15], (info_buf[12] << 8) + info_buf[13],
+       info_buf[16], info_buf[17], info_buf[18]);
+
+  return 0;
+}
+
+/*
+ * snap_pic - take a picture (and call get_pictures_info to re-create
+ *		the directory related data structures)
+ */
+static SANE_Status
+snap_pic (SANE_Int fd)
+{
+
+  SANE_Char f[] = "snap_pic";
+
+#if 0
+/* Just checking... It looks like after snapping the picture, we
+ * get two "d1" ACK responses back, even though the documentation seems
+ * to say that there should only be one.  I thought the first one could
+ * have been an unread response from an earlier command, so I
+ * I tried flushing any data here.  Still seeing the multiple
+ * d1 bytes, however...
+ */
+  {
+    SANE_Int n;
+    SANE_Char flush[10];
+    n = read (Camera.fd, flush, 10);
+    if (n > 0)
+      {
+	DBG (127, "%s: flushed %d bytes\n", f, n);
+      }
+    else
+      {
+	DBG (127, "%s: nothing to flush\n", f);
+      }
+  }
+#endif
+
+  /* make sure camera is set to our settings state */
+  if (change_res (Camera.fd, dc240_opt_lowres) == -1)
+    {
+      DBG (1, "%s: Failed to set resolution\n", f);
+      return SANE_STATUS_INVAL;
+    }
+
+  /* take the picture */
+  if (send_pck (fd, shoot_pck) == -1)
+    {
+      DBG (1, "%s: error: send_pck returned -1\n", f);
+      return SANE_STATUS_INVAL;
+    }
+  else
+    {
+      if (end_of_data (Camera.fd) == -1)
+	{
+	  DBG (1, "%s: error: end_of_data returned -1\n", f);
+	  return SANE_STATUS_INVAL;
+	}
+    }
+  Camera.pic_taken++;
+  Camera.pic_left--;
+  Camera.current_picture_number = Camera.pic_taken;
+  image_range.max++;
+  sod[DC240_OPT_IMAGE_NUMBER].cap &= ~SANE_CAP_INACTIVE;
+
+  /* add this one to the Pictures array */
+
+  if (get_pictures_info () == NULL)
+    {
+      DBG (1, "%s: Failed to get new picture info\n", f);
+      /* XXX - I guess we should try to erase the image here */
+      return SANE_STATUS_INVAL;
+    }
+
+  return SANE_STATUS_GOOD;
+}
+
+/*
+ * read_dir - read a list of file names from the specified directory
+ * 		and create a linked list of file name entries in
+ *		alphabetical order.  The first entry in the list will
+ *		be "picture #1", etc.
+ */
+static SANE_Int
+read_dir (SANE_String dir)
+{
+  SANE_Int retval = 0;
+  SANE_Byte buf[256];
+  SANE_Byte *next_buf;
+  SANE_Int i, entries;
+  SANE_Byte r = 0xf0;		/* prime the loop with a "camera busy" */
+  SANE_Char f[] = "read_dir";
+  struct cam_dirlist *e, *next;
+
+  /* Free up current list */
+  for (e = dir_head; e; e = next)
+    {
+      DBG (127, "%s: free entry %s\n", f, e->name);
+      next = e->next;
+      free (e);
+    }
+  dir_head = NULL;
+
+  if (send_pck (Camera.fd, read_dir_pck) == -1)
+    {
+      DBG (1, "%s: error: send_pck returned -1\n", f);
+      return -1;
+    }
+
+  buf[0] = 0x80;
+  strcpy ((char *) &buf[1], dir);
+  for (i = 49; i <= 56; i++)
+    {
+      buf[i] = 0xff;
+    }
+
+  if (send_data (buf) == -1)
+    {
+      DBG (1, "%s: error: send_data returned -1\n", f);
+      return -1;
+    }
+
+
+  if (read_data (Camera.fd, (SANE_Byte *) & dir_buf2, 256) == -1)
+    {
+      DBG (1, "%s: error: read_data returned -1\n", f);
+      return -1;
+    }
+
+  entries = (dir_buf2[0] << 8) + dir_buf2[1];
+  DBG (127, "%s: result of dir read is %x, number of entries=%d\n", f, r,
+       entries);
+
+  if (entries > 1001)
+    {
+      DBG (1, "%s: error: more than 999 pictures not supported yet\n", f);
+      return -1;
+    }
+
+  /* Determine if it's time to read another 256 byte buffer from the camera */
+
+  next_buf = ((SANE_Byte *) & dir_buf2) + 256;
+  while (dir_buf2 + 2 + CAMDIRENTRYSIZE * entries >= (SANE_Byte *) next_buf)
+    {
+
+      DBG (127, "%s: reading additional directory buffer\n", f);
+      if (read_data (Camera.fd, next_buf, 256) == -1)
+	{
+	  DBG (1, "%s: error: read_data returned -1\n", f);
+	  return -1;
+	}
+      next_buf += 256;
+    }
+
+  for (i = 0; i < entries; i++)
+
+    {
+      /* Hack: I don't know what attr is used for, so setting it
+       * to zero is a convenient way to put in the null terminator
+       */
+      get_attr (i) = 0;
+      DBG (127, "%s: entry=%s\n", f, get_name (i));
+
+      if ((get_name (i))[0] == '.')
+	{
+	  continue;
+	}
+
+      if (dir_insert
+	  ((struct cam_dirent *) &dir_buf2[2 + CAMDIRENTRYSIZE * i]) != 0)
+	{
+	  DBG (1, "%s: error: failed to insert dir entry\n", f);
+	  return -1;
+	}
+      retval++;
+    }
+
+  if (end_of_data (Camera.fd) == -1)
+    {
+      DBG (1, "%s: error: end_of_data returned -1\n", f);
+      return -1;
+    }
+
+  return retval;
+}
+
+/*
+ * read_info - read the info block from camera for the specified file
+ */
+static SANE_Int
+read_info (SANE_String fname)
+{
+  SANE_Byte buf[256];
+  SANE_Int i;
+  SANE_Char f[] = "read_info";
+  SANE_Char path[256];
+
+  strcpy (path, "\\PCCARD\\DCIM\\");
+  strcat (path, (char *) folder_list[current_folder]);
+  strcat (path, "\\");
+  strcat (path, fname);
+  path[strlen (path) - 3] = '\0';
+  strcat (path, ".JPG");
+
+  if (send_pck (Camera.fd, pic_info_pck) == -1)
+    {
+      DBG (1, "%s: error: send_pck returned -1\n", f);
+      return SANE_STATUS_INVAL;
+    }
+
+  buf[0] = 0x80;
+  strcpy ((char *) &buf[1], path);
+  for (i = 49; i <= 56; i++)
+    {
+      buf[i] = 0xff;
+    }
+
+  if (send_data (buf) == -1)
+    {
+      DBG (1, "%s: error: send_data returned -1\n", f);
+      return SANE_STATUS_INVAL;
+    }
+
+  if (read_data (Camera.fd, info_buf, 256) != 0)
+    {
+      DBG (1, "%s: error: Failed in read_data\n", f);
+      return -1;
+    }
+
+  DBG (9, "%s: data type=%d, cam type=%d, file type=%d\n", f,
+       info_buf[0], info_buf[1], info_buf[2]);
+
+  if (end_of_data (Camera.fd) == -1)
+    {
+      DBG (1, "%s: error: end_of_data returned -1\n", f);
+      return -1;
+    }
+
+  return 0;
+}
+
+
+/*
+ * send_data - Send a data block - assumes all data blocks to camera 
+ *		are 60 bytes long 
+ */
+
+static SANE_Int
+send_data (SANE_Byte * buf)
+{
+  SANE_Byte r = 0xf0;		/* prime the loop with a "camera busy" */
+  SANE_Int i, n;
+  SANE_Byte csum;
+  SANE_Char f[] = "send_data";
+
+  for (i = 1, csum = 0; i < 59; i++)
+    {
+      csum ^= buf[i];
+    }
+  buf[59] = csum;
+  DBG (127, "%s: about to send data block\n", f);
+
+  /* keep trying if camera says it's busy */
+  while (r == 0xf0)
+    {
+      if (write (Camera.fd, (char *) buf, 60) != 60)
+	{
+	  DBG (1, "%s: error: write returned -1\n", f);
+	  return -1;
+	}
+
+      /* need to wait before we read command result */
+#ifdef HAVE_USLEEP
+      usleep (cmdrespause);
+#else
+      sleep (1);
+#endif
+
+      if ((n = read (Camera.fd, (char *) &r, 1)) != 1)
+	{
+	  DBG (1, "%s: error: read returned -1\n", f);
+	  return -1;
+	}
+    }
+
+  if (r != 0xd2)
+    {
+      DBG (1, "%s: error: bad response to send_data (%d)\n", f, r);
+      return -1;
+    }
+
+  return 0;
+}
+
+/*
+ * dir_insert - Add (in alphabetical order) a directory entry to the
+ * 		current list of entries.
+ */
+static SANE_Int
+dir_insert (struct cam_dirent *entry)
+{
+  struct cam_dirlist *cur, *e;
+
+  cur = (struct cam_dirlist *) malloc (sizeof (struct cam_dirlist));
+  if (cur == NULL)
+    {
+      DBG (1, "dir_insert: error: could not malloc entry\n");
+      return -1;
+    }
+
+  strcpy (cur->name, entry->name);
+  DBG (127, "dir_insert: name is %s\n", cur->name);
+
+  cur->next = NULL;
+
+  if (dir_head == NULL)
+    {
+      dir_head = cur;
+    }
+  else if (strcmp (cur->name, dir_head->name) < 0)
+    {
+      cur->next = dir_head;
+      dir_head = cur;
+      return 0;
+    }
+  else
+    {
+      for (e = dir_head; e->next; e = e->next)
+	{
+	  if (strcmp (e->next->name, cur->name) > 0)
+	    {
+	      cur->next = e->next;
+	      e->next = cur;
+	      return 0;
+	    }
+	}
+      e->next = cur;
+    }
+  return 0;
+}
+
+/*
+ *  dir_delete - Delete a directory entry from the linked list of file 
+ * 		names
+ */
+static SANE_Int
+dir_delete (SANE_String fname)
+{
+  struct cam_dirlist *cur, *e;
+
+  DBG (127, "dir_delete:  %s\n", fname);
+
+  if (strcmp (fname, dir_head->name) == 0)
+    {
+      cur = dir_head;
+      dir_head = dir_head->next;
+      free (cur);
+      return 0;
+    }
+
+  for (e = dir_head; e->next; e = e->next)
+    {
+      if (strcmp (fname, e->next->name) == 0)
+	{
+	  cur = e->next;
+	  e->next = e->next->next;
+	  free (cur);
+	  return (0);
+	}
+    }
+  DBG (1, "dir_delete: Couldn't find entry %s in dir list\n", fname);
+  return -1;
+}
+
+/*
+ *  set_res - set picture size depending on resolution settings 
+ */
+static void
+set_res (SANE_Int lowres)
+{
+  if (dc240_opt_thumbnails)
+    {
+      parms.bytes_per_line = 160 * 3;
+      parms.pixels_per_line = 160;
+      parms.lines = 120;
+    }
+  else if (lowres)
+    {
+      parms.bytes_per_line = LOWRES_WIDTH * 3;
+      parms.pixels_per_line = LOWRES_WIDTH;
+      parms.lines = LOWRES_HEIGHT;
+    }
+  else
+    {
+      parms.bytes_per_line = HIGHRES_WIDTH * 3;
+      parms.pixels_per_line = HIGHRES_WIDTH;
+      parms.lines = HIGHRES_HEIGHT;
+    }
+}