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/*
* commands.c
*
* Command set for the digita cameras
*
* Copyright 1999-2001 Johannes Erdfelt
*
* 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 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include "digita.h"
#include "gphoto2-endian.h"
#define GP_MODULE "digita"
#include <gphoto2/gphoto2-port.h>
static void build_command(struct digita_command *cmd, int length, short command)
{
memset(cmd, 0, sizeof(*cmd));
/* Length is the sizeof the digita_command minus the length */
/* parameter, plus whatever other data we send */
cmd->length = htobe32(sizeof(struct digita_command) -
sizeof(unsigned int) + length);
cmd->command = htobe16(command);
}
struct storage_status {
struct digita_command cmd;
unsigned int takencount;
unsigned int availablecount;
int rawcount;
};
int digita_get_storage_status(CameraPrivateLibrary *dev, int *taken,
int *available, int *rawcount)
{
struct digita_command cmd;
struct storage_status ss;
int ret;
build_command(&cmd, 0, DIGITA_GET_STORAGE_STATUS);
ret = dev->send(dev, &cmd, sizeof(cmd));
if (ret < 0) {
GP_DEBUG("digita_get_storage_status: error sending command (ret = %d)", ret);
return -1;
}
ret = dev->read(dev, (unsigned char *)&ss, sizeof(ss));
if (ret < 0) {
GP_DEBUG("digita_get_storage_status: error getting count (ret = %d)", ret);
return -1;
}
if (taken)
*taken = be32toh(ss.takencount);
if (available)
*available = be32toh(ss.availablecount);
if (rawcount)
*rawcount = be32toh(ss.rawcount);
return 0;
}
int digita_get_file_list(CameraPrivateLibrary *dev)
{
struct digita_command cmd;
struct get_file_list gfl;
char *buffer;
int ret, taken, buflen;
int err;
if (digita_get_storage_status(dev, &taken, NULL, NULL) < 0)
return -1;
dev->num_pictures = taken;
buflen = (taken * sizeof(struct file_item)) + sizeof(cmd) + 4;
buffer = malloc(buflen);
if (!buffer) {
GP_DEBUG("digita_get_file_list: error allocating %d bytes", buflen);
return -1;
}
build_command(&gfl.cmd, sizeof(gfl) - sizeof(gfl.cmd), DIGITA_GET_FILE_LIST);
gfl.listorder = htobe32(1);
ret = dev->send(dev, (void *)&gfl, sizeof(gfl));
if (ret < 0) {
GP_DEBUG("digita_get_file_list: error sending command (ret = %d)", ret);
err = -1;
goto end;
}
ret = dev->read(dev, (void *)buffer, buflen);
if (ret < 0) {
GP_DEBUG("digita_get_file_list: error receiving data (ret = %d)", ret);
err = -1;
goto end;
}
if (dev->file_list)
free(dev->file_list);
dev->file_list = malloc(taken * sizeof(struct file_item));
if (!dev->file_list) {
GP_DEBUG("digita_get_file_list: error allocating file_list memory (ret = %d)", ret);
err = -1;
goto end;
}
memcpy(dev->file_list, buffer + sizeof(cmd) + 4, taken * sizeof(struct file_item));
err = 0;
end:
free(buffer);
return err;
}
#define GFD_BUFSIZE 19432
int digita_get_file_data(CameraPrivateLibrary *dev, int thumbnail,
struct filename *filename, struct partial_tag *tag, void *buffer)
{
struct get_file_data_send gfds;
struct get_file_data_receive *gfdr;
int ret;
char *tbuf;
build_command(&gfds.cmd, sizeof(gfds) - sizeof(gfds.cmd), DIGITA_GET_FILE_DATA);
memcpy(&gfds.fn, filename, sizeof(gfds.fn));
memcpy(&gfds.tag, tag, sizeof(gfds.tag));
gfds.dataselector = htobe32(thumbnail);
tbuf = malloc(GFD_BUFSIZE + sizeof(*gfdr));
if (!tbuf) {
GP_DEBUG("digita_get_file_data: unable to allocate %ud bytes",
(unsigned int)(GFD_BUFSIZE + sizeof(*gfdr)));
return -1;
}
gfdr = (struct get_file_data_receive *)tbuf;
ret = dev->send(dev, &gfds, sizeof(gfds));
if (ret < 0) {
GP_DEBUG("digita_get_file_data: error sending command (ret = %d)", ret);
free(tbuf);
return -1;
}
ret = dev->read(dev, gfdr, GFD_BUFSIZE + sizeof(*gfdr));
if (ret < 0) {
GP_DEBUG("digita_get_file_data: error reading data (ret = %d)", ret);
return -1;
}
if (gfdr->cmd.result) {
GP_DEBUG("digita_get_file_data: bad result (%d)", gfdr->cmd.result);
return gfdr->cmd.result;
}
memcpy(buffer, tbuf + sizeof(*gfdr), be32toh(gfdr->tag.length) + (thumbnail ? 16 : 0));
memcpy(tag, &gfdr->tag, sizeof(*tag));
free(tbuf);
return 0;
}
int digita_delete_picture(CameraPrivateLibrary *dev, struct filename *filename)
{
struct erase_file ef;
struct digita_command response;
int ret;
build_command(&ef.cmd, sizeof(ef.fn), DIGITA_ERASE_FILE);
memcpy(&ef.fn, filename, sizeof(ef.fn));
ef.zero = 0;
ret = dev->send(dev, (unsigned char *)&ef, sizeof(ef));
if (ret < 0) {
GP_DEBUG("error sending command (ret = %d)", ret);
return -1;
}
ret = dev->read(dev, (unsigned char *)&response, sizeof(response));
if (ret < 0) {
GP_DEBUG("error reading reply (ret = %d)", ret);
return -1;
}
return 0;
}
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