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#include "config.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gphoto2/gphoto2.h>
#include "barbie.h"
#define GP_MODULE "barbie"
/* Some simple packet templates */
char packet_1[4] = {0x02, 0x01, 0x01, 0x03};
static char *barbie_read_data (GPPort *port, char *cmd, int cmd_size, int data_type, int *size);
/* Utility Functions
=======================================================================
*/
static void
barbie_packet_dump(GPPort *port, int direction, char *buf, int size) {
int x;
if (direction == 0)
GP_DEBUG( "\tRead Packet (%i): ", size);
else
GP_DEBUG( "\tWrite Packet (%i): ", size);
for (x=0; x<size; x++) {
if (isalpha(buf[x]))
GP_DEBUG ("[ '%c' ] ", (unsigned char)buf[x]);
else
GP_DEBUG ("[ x%02x ] ", (unsigned char)buf[x]);
}
GP_DEBUG ("\n");
}
static int
barbie_write_command(GPPort *port, char *command, int size) {
int x;
barbie_packet_dump(port, 1, command, size);
x=gp_port_write(port, command, size);
return (x == GP_OK);
}
static int
barbie_read_response(GPPort *port, char *response, int size) {
int x;
char ack = 0;
/* Read the ACK */
x=gp_port_read(port, &ack, 1);
barbie_packet_dump(port, 0, &ack, 1);
if ((ack != ACK)||(x<0))
return (0);
/* Read the Response */
memset(response, 0, size);
x=gp_port_read(port,response, size);
barbie_packet_dump(port, 0, response, x);
return (x > 0);
}
int barbie_exchange (GPPort *port, char *cmd, int cmd_size, char *resp, int resp_size) {
int count = 0;
while (count++ < 10) {
if (barbie_write_command(port, cmd, cmd_size) != 1)
return (0);
if (barbie_read_response(port, resp, resp_size) != 1)
return (0);
/* if it's not busy, return */
if (resp[RESPONSE_BYTE] != '!')
return (1);
/* if busy, sleep 2 seconds */
GP_SYSTEM_SLEEP(2000);
}
return (0);
}
int barbie_ping(GPPort *port) {
char cmd[4], resp[4];
GP_DEBUG( "Pinging the camera\n");
memcpy(cmd, packet_1, 4);
cmd[COMMAND_BYTE] = 'E';
cmd[DATA1_BYTE] = 'x';
if (barbie_exchange(port, cmd, 4, resp, 4) == 0)
return (0);
if (resp[DATA1_BYTE] != 'x')
return (0);
GP_DEBUG ("Ping answered!\n");
return (1);
}
int barbie_file_count (GPPort *port) {
char cmd[4], resp[4];
GP_DEBUG ("Getting the number of pictures\n");
memcpy(cmd, packet_1, 4);
cmd[COMMAND_BYTE] = 'I';
cmd[DATA1_BYTE] = 0;
if (barbie_exchange(port, cmd, 4, resp, 4) != 1)
return (0);
return (resp[DATA1_BYTE]);
}
char *barbie_read_firmware(GPPort *port) {
char cmd[4];
int x;
memcpy(cmd, packet_1, 4);
cmd[COMMAND_BYTE] = 'V';
cmd[DATA1_BYTE] = '0';
return (barbie_read_data(port, cmd, 4, BARBIE_DATA_FIRMWARE, &x));
}
char *barbie_read_picture(GPPort *port, int picture_number, int get_thumbnail, int *size) {
char cmd[4], resp[4];
memcpy(cmd, packet_1, 4);
cmd[COMMAND_BYTE] = 'A';
cmd[DATA1_BYTE] = picture_number;
if (barbie_exchange(port, cmd, 4, resp, 4) != 1)
return (NULL);
memcpy(cmd, packet_1, 4);
if (get_thumbnail)
cmd[COMMAND_BYTE] = 'M';
else
cmd[COMMAND_BYTE] = 'U';
cmd[DATA1_BYTE] = 0;
return (barbie_read_data(port, cmd, 4, BARBIE_DATA_PICTURE, size));
}
char *barbie_read_data (GPPort *port, char *cmd, int cmd_size, int data_type, int *size) {
char c, resp[4];
int n1, n2, n3, n4, x, y, z;
unsigned char r, g, b;
char *s = NULL, *us = NULL, *rg = NULL;
char ppmhead[64];
if (barbie_exchange(port, cmd, cmd_size, resp, 4) != 1)
return (0);
switch (data_type) {
case BARBIE_DATA_FIRMWARE:
GP_DEBUG ("Getting Firmware\n");
/* we're getting the firmware revision */
*size = resp[2];
s = (char *)malloc(sizeof(char)*(*size));
memset(s, 0, *size);
s[0] = resp[3];
if (gp_port_read(port, &s[1], (*size)-1) < 0) {
free(s);
return (NULL);
}
break;
case BARBIE_DATA_PICTURE:
GP_DEBUG( "Getting Picture\n");
/* we're getting a picture */
n1 = (unsigned char)resp[2];
n2 = (unsigned char)resp[3];
if (gp_port_read(port, &c, 1) < 0)
return (NULL);
n3 = (unsigned char)c;
if (gp_port_read(port, &c, 1) < 0)
return (NULL);
n4 = (unsigned char)c;
*size = PICTURE_SIZE(n1, n2, n3, n4);
printf("\tn1=%i n2=%i n3=%i n4=%i size=%i\n", n1, n2 ,n3, n4, *size);
sprintf(ppmhead, "P6\n# test.ppm\n%i %i\n255\n", n1-1, (n2+n3-1));
us = (char *)malloc(sizeof(char)*(*size));
rg = (char *)malloc(sizeof(char)*(*size));
s = (char *)malloc(sizeof(char)*(n1-1)*(n2+n3-1)*3+strlen(ppmhead));
memset(us, 0, *size);
memset(rg, 0, *size);
memset(s , 0, *size+strlen(ppmhead));
if (gp_port_read(port, us, *size)<0) {
free(us);
free(rg);
free(s);
return (NULL);
}
/* Unshuffle the data */
*size = *size - 16;
for (x=0; x<(n2+n3); x++) {
for (y=0; y<n1; y++) {
z = x*n1 + y/2 + y%2*(n1/2+2);
rg[x*n1+y] = us[z];
}
}
/* Camera uses Bayen array:
* bg bg ...
* gr gr ...
*/
strcpy(s, ppmhead);
z = strlen(s);
for (x=0; x<(n2+n3-1); x++) {
for (y=0; y<(n1-1); y++) {
b = (unsigned char)rg[x*n1+y];
g = (((unsigned char)rg[(x+1)*n1+y] +
(unsigned char)rg[x*n1+y+1]) / 2);
r = (unsigned char)rg[(x+1)*n1+y+1];
s[z++] = r;
s[z++] = g;
s[z++] = b;
}
}
*size = z;
GP_DEBUG( "size=%i\n", *size);
break;
case BARBIE_DATA_THUMBNAIL:
break;
default:
break;
}
/* read the footer */
if (gp_port_read(port, &c, 1) < 0) {
free(us);
free(rg);
free(s);
return (0);
}
free(us);
free(rg);
return(s);
}
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