stop_me = false;
m_isWorking = false;
shuttlevalue = 0xffff;
- shuttlechange = false;
+ shuttlecounter = 0;
jogvalue = 0xffff;
}
void ShuttleThread::run()
{
kDebug() << "------- STARTING SHUTTLE: " << m_device;
-
+ /* open file descriptor */
const int fd = KDE_open((char *) m_device.toUtf8().data(), O_RDONLY);
if (fd < 0) {
fprintf(stderr, "Can't open Jog Shuttle FILE DESCRIPTOR\n");
- return;;
+ return;
}
- EV ev;
+ EV ev;
if (ioctl(fd, EVIOCGRAB, 1) < 0) {
fprintf(stderr, "Can't get exclusive access on Jog Shuttle FILE DESCRIPTOR\n");
close(fd);
- return;;
+ return;
}
+ fd_set readset;
+ struct timeval timeout;
+
int num_warnings = 0;
+ int result, iof = -1;
+
+ /* enter thread loop */
while (!stop_me) {
- if (read(fd, &ev, sizeof(ev)) < 0) {
- if (num_warnings % 10000 == 0)
- fprintf(stderr, "Failed to read event from Jog Shuttle FILE DESCRIPTOR (repeated %d times)\n", num_warnings + 1);
- num_warnings++;
- }
- handle_event(ev);
+ /* reset the read set */
+ FD_ZERO(&readset);
+ FD_SET(fd, &readset);
+
+ /* reinit the timeout structure */
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 300000; /* 300 ms */
+
+ /* do the select */
+ result = select(fd+1, &readset, NULL, NULL, &timeout);
+
+ /* see if there was an error or timeout */
+ if (result < 0) {
+// perror("select failed");
+ } else if (result == 0) {
+// puts("TIMEOUT");
+ } else {
+ /* we have input */
+ if (FD_ISSET(fd, &readset)) {
+ /* get fd settings */
+ if ((iof = fcntl(fd, F_GETFL, 0)) != -1) {
+ /* set fd non blocking */
+ fcntl(fd, F_SETFL, iof | O_NONBLOCK);
+ /* read input */
+ if (read(fd, &ev, sizeof(ev)) < 0) {
+ if (num_warnings % 10000 == 0)
+ /* should not happen cause select called before */
+ fprintf(stderr, "Failed to read event from Jog Shuttle FILE DESCRIPTOR (repeated %d times)\n", num_warnings + 1);
+ num_warnings++;
+ }
+
+ /* restore settings */
+ if (iof != -1) {
+ fcntl(fd, F_SETFL, iof);
+ }
+ /* process event */
+ handle_event(ev);
+ } else {
+ fprintf(stderr, "Can't set Jog Shuttle FILE DESCRIPTOR to O_NONBLOCK\n");
+ stop_me = true;
+ }
+ }
+ }
}
- close(fd);
+ /* close the handle and return thread */
+ close(fd);
}
void ShuttleThread::handle_event(EV ev)
//gettimeofday( &last_shuttle, 0 );
//need_synthetic_shuttle = value != 0;
- if (value == shuttlevalue)
+ if (value == shuttlevalue) {
+ shuttlecounter = 1;
return;
+ }
if (value > MAX_SHUTTLE_RANGE || value < -MAX_SHUTTLE_RANGE) {
fprintf(stderr, "Jog Shuttle returned value of %d (should be between -%d ad +%d)", value, MAX_SHUTTLE_RANGE, MAX_SHUTTLE_RANGE);
return;
}
shuttlevalue = value;
- shuttlechange = true;
+ shuttlecounter = 1;
QApplication::postEvent(m_parent, new QEvent((QEvent::Type) (JOG_STOP + value)));
}
QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_BACK1));
else if ((forward && !wrap) || (rewind && wrap))
QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_FWD1));
- else if (!forward && !rewind && !shuttlechange)
+ else if (!forward && !rewind && shuttlecounter > 2) {
// An event without changing the jog value is sent after each shuttle change.
// As the shuttle rest position does not get a shuttle event, only a non-position-changing jog event.
// Hence we stop on this when we see 2 non-position-changing jog events in a row.
+ shuttlecounter = 0;
QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_STOP));
+ }
}
jogvalue = value;
- shuttlechange = false;
+ if (shuttlecounter > 0) shuttlecounter++;
}
/* the read fd is in blocking mode => stop_me is broken at the moment */
m_shuttleProcess.stop_me = true;
m_shuttleProcess.exit();
- /* give the thread some time to shutdown */
- m_shuttleProcess.wait(100);
+ /* give the thread some time (ms) to shutdown */
+ m_shuttleProcess.wait(600);
/* if still running - do it in the hardcore way */
if (m_shuttleProcess.isRunning()) {