1 /***************************************************************************
2 * Copyright (C) 2008 by Jean-Baptiste Mardelle (jb@kdenlive.org) *
3 * Based on code by Arendt David <admin@prnet.org> *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
19 ***************************************************************************/
22 #include "jogshuttle.h"
27 #include <QApplication>
34 #include <linux/input.h>
55 // Constants for the returned events when reading them from the device
60 // Constants for the signals sent.
61 #define JOG_BACK1 10001
62 #define JOG_FWD1 10002
63 #define KEY_EVENT_OFFSET 20000
65 // middle value for shuttle, will be +/-MAX_SHUTTLE_RANGE
66 #define JOG_STOP 10020
67 #define MAX_SHUTTLE_RANGE 7
69 void ShuttleThread::init(QObject *parent, QString device)
75 shuttlevalue = 0xffff;
76 shuttlechange = false;
80 bool ShuttleThread::isWorking()
85 void ShuttleThread::run()
87 kDebug() << "------- STARTING SHUTTLE: " << m_device;
89 const int fd = KDE_open((char *) m_device.toUtf8().data(), O_RDONLY);
91 fprintf(stderr, "Can't open Jog Shuttle FILE DESCRIPTOR\n");
96 if (ioctl(fd, EVIOCGRAB, 1) < 0) {
97 fprintf(stderr, "Can't get exclusive access on Jog Shuttle FILE DESCRIPTOR\n");
101 int num_warnings = 0;
103 if (read(fd, &ev, sizeof(ev)) < 0) {
104 if (num_warnings % 10000 == 0)
105 fprintf(stderr, "Failed to read event from Jog Shuttle FILE DESCRIPTOR (repeated %d times)\n", num_warnings + 1);
114 void ShuttleThread::handle_event(EV ev)
118 key(ev.code, ev.value);
123 if (ev.code == SHUTTLE)
129 void ShuttleThread::key(unsigned short code, unsigned int value)
132 // Button release (ignored)
141 kDebug() << "Button PRESSED: " << code;
142 QApplication::postEvent(m_parent, new QEvent((QEvent::Type)(KEY_EVENT_OFFSET + code)));
146 void ShuttleThread::shuttle(int value)
148 //gettimeofday( &last_shuttle, 0 );
149 //need_synthetic_shuttle = value != 0;
151 if (value == shuttlevalue)
154 if (value > MAX_SHUTTLE_RANGE || value < -MAX_SHUTTLE_RANGE) {
155 fprintf(stderr, "Jog Shuttle returned value of %d (should be between -%d ad +%d)", value, MAX_SHUTTLE_RANGE, MAX_SHUTTLE_RANGE);
158 shuttlevalue = value;
159 shuttlechange = true;
160 QApplication::postEvent(m_parent, new QEvent((QEvent::Type) (JOG_STOP + value)));
163 void ShuttleThread::jog(unsigned int value)
165 // generate a synthetic event for the shuttle going
166 // to the home position if we have not seen one recently.
167 //if (shuttlevalue != 0) {
168 // QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_STOP));
172 // This code takes care of wrapping around the limits of the jog dial number (it is represented as a single byte, hence
173 // wraps at the 0/255 boundary). I used 25 as the difference to make sure that even in heavy load, with the jog dial
174 // turning fast and we miss some events that we do not mistakenly reverse the direction.
175 // Note also that at least the Contour ShuttlePRO v2 does not send an event for the value 0, so at the wrap it will
176 // need 2 events to go forward. But that is nothing we can do about...
177 if (jogvalue != 0xffff) {
178 //fprintf(stderr, "value=%d jogvalue=%d\n", value, jogvalue);
179 bool wrap = abs(value - jogvalue) > 25;
180 bool rewind = value < jogvalue;
181 bool forward = value > jogvalue;
182 if ((rewind && !wrap) || (forward && wrap))
183 QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_BACK1));
184 else if ((forward && !wrap) || (rewind && wrap))
185 QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_FWD1));
186 else if (!forward && !rewind && !shuttlechange)
187 // An event without changing the jog value is sent after each shuttle change.
188 // As the shuttle rest position does not get a shuttle event, only a non-position-changing jog event.
189 // Hence we stop on this when we see 2 non-position-changing jog events in a row.
190 QApplication::postEvent(m_parent, new QEvent((QEvent::Type) JOG_STOP));
193 shuttlechange = false;
197 JogShuttle::JogShuttle(QString device, QObject *parent) :
203 JogShuttle::~JogShuttle()
205 if (m_shuttleProcess.isRunning()) m_shuttleProcess.exit();
208 void JogShuttle::initDevice(QString device)
210 if (m_shuttleProcess.isRunning()) {
211 if (device == m_shuttleProcess.m_device) return;
214 m_shuttleProcess.init(this, device);
215 m_shuttleProcess.start(QThread::LowestPriority);
218 void JogShuttle::stopDevice()
220 if (m_shuttleProcess.isRunning())
221 m_shuttleProcess.stop_me = true;
224 void JogShuttle::customEvent(QEvent* e)
226 int code = e->type();
228 // Handle simple job events
238 int shuttle_pos = code - JOG_STOP;
239 if (shuttle_pos >= -MAX_SHUTTLE_RANGE && shuttle_pos <= MAX_SHUTTLE_RANGE) {
240 emit shuttlePos(shuttle_pos);
244 // we've got a key event.
245 //fprintf(stderr, "Firing button event for #%d\n", e->type() - KEY_EVENT_OFFSET); // DBG
246 emit button(e->type() - KEY_EVENT_OFFSET);
251 // #include "jogshuttle.moc"