Recent SDM and "collaborative" juciphox builds feature scriptless remote, i.e. the ability to use a USB remote shutter in the conventional way. The corresponding codebase is apparently due to the stereo-photographer Masuji Suto. The code is rather versatile and oriented on stereo-photographers' needs. It is also rather involved.
I've been using much simpler code, which I would like to share. It's confined to core\kbd.c, in the function kbd_process(), the code additions easily spotted through the enclosing comments:
/*------------------- Alex scriptless remote additions start --------------------*/
static int remoteHalfShutter=0, remoteFullShutter=0, remoteShooting=0, remoteClickTimer=0;
#define REMOTE_MAX_CLICK_LENGTH
50
/*-------------------- Alex scriptless remote additions end ---------------------*/
long kbd_process()
{
/* Alternative keyboard mode stated/exited by pressing print key.
* While running Alt. mode shoot key will start a script execution.
*/
if (kbd_blocked){
/*------------------- Alex scriptless remote additions start --------------------*/
if (remoteShooting) {
if (remoteHalfShutter) {
if (get_usb_power(1)) {
if (remoteClickTimer < REMOTE_MAX_CLICK_LENGTH) {
remoteHalfShutter=0;
remoteFullShutter=1;
kbd_key_press(KEY_SHOOT_FULL);
}
return 1;
} else {
--remoteClickTimer;
if ( remoteClickTimer == 0 ) {
kbd_key_release_all();
remoteHalfShutter=0;
remoteShooting=0;
kbd_blocked=0;
return 0;
}
}
}
if (remoteFullShutter) {
if (get_usb_power(1)) {
return 1;
} else {
kbd_key_release_all();
remoteFullShutter=0;
remoteShooting=0;
kbd_blocked=0;
return 0;
}
}
}
/*-------------------- Alex scriptless remote additions end ---------------------*/
if (key_pressed){
if (kbd_is_key_pressed(conf.alt_mode_button)) {
++key_pressed;
if (key_pressed==CAM_EMUL_KEYPRESS_DELAY) {
kbd_key_press(conf.alt_mode_button);
}
if (key_pressed==(CAM_EMUL_KEYPRESS_DELAY+CAM_EMUL_KEYPRESS_DURATION)) {
kbd_key_release_all();
key_pressed = 2;
kbd_blocked = 0;
//
gui_kbd_leave();
}
} else if (kbd_get_pressed_key() == 0) {
gui_kbd_enter();
key_pressed = 0;
}
return 1;
}
if (kbd_is_key_pressed(conf.alt_mode_button)){
key_pressed = 2;
kbd_blocked = 0;
gui_kbd_leave();
return 1;
}
if (kbd_is_key_pressed(KEY_SHOOT_FULL)){
if (!state_kbd_script_run){
script_console_clear();
script_console_add_line(lang_str(LANG_CONSOLE_TEXT_STARTED));
script_start();
} else {
script_console_add_line(lang_str(LANG_CONSOLE_TEXT_INTERRUPTED));
script_end();
}
}
if (state_kbd_script_run)
process_script();
else {
gui_kbd_process();
}
} else {
//if (kbd_is_key_pressed(KEY_SHOOT_HALF) && kbd_is_key_pressed(conf.alt_mode_button)) return 0;
if (!key_pressed && kbd_is_key_pressed(conf.alt_mode_button)){
kbd_blocked = 1;
key_pressed = 1;
kbd_key_release_all();
//
gui_kbd_enter();
return 1;
}
/*------------------- Alex scriptless remote additions start --------------------*/
if (conf.remote_enable && key_pressed != 2 && get_usb_power(1)) {
remoteShooting = 1;
remoteHalfShutter = 1;
remoteClickTimer = REMOTE_MAX_CLICK_LENGTH;
kbd_blocked = 1;
kbd_key_release_all();
kbd_key_press(KEY_SHOOT_HALF);
return 1;
}
/*-------------------- Alex scriptless remote additions end ---------------------*/
if (key_pressed == 2) {
if (kbd_is_key_pressed(conf.alt_mode_button))
return 1;
// wait until released before unblocking kbd
else
key_pressed = 0;
}
if (conf.use_zoom_mf && kbd_use_zoom_as_mf()) {
return 1;
}
other_kbd_process(); // processed other keys in not <alt> mode
}
return kbd_blocked;
}
Then, if USB remote is enabled, pressing/releasing remote button is equivalent to pressing/releasing the shutter halfway. To take a shot, do a "reversed click", i.e. momentarily release and again depress the remote button whithin 0.5s, which will "push" the shutter all the way.
