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// libavg - Media Playback Engine.
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// Copyright (C) 2003-2011 Ulrich von Zadow
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// Current versions can be found at www.libavg.de
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#include "LibMTDevInputDevice.h"
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#include "TouchEvent.h"
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#include "TouchStatus.h"
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#include "../base/Logger.h"
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#include "../base/Point.h"
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#include "../base/ObjectCounter.h"
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#include "../base/Exception.h"
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#include "../base/OSHelper.h"
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#include <linux/input.h>
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#include <sys/types.h>
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#include <mtdev-mapping.h>
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LibMTDevInputDevice::LibMTDevInputDevice()
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LibMTDevInputDevice::~LibMTDevInputDevice()
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mtdev_close(m_pMTDevice);
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void LibMTDevInputDevice::start()
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string sDevice("/dev/input/event3");
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getEnv("AVG_LINUX_MULTITOUCH_DEVICE", sDevice);
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m_DeviceFD = ::open(sDevice.c_str(), O_RDONLY | O_NONBLOCK);
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if (m_DeviceFD == -1) {
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throw Exception(AVG_ERR_MT_INIT,
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string("Linux multitouch event source: Could not open device file '")+
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sDevice+"'. "+strerror(errno)+".");
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m_pMTDevice = new mtdev;
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int err = mtdev_open(m_pMTDevice, m_DeviceFD);
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throw Exception(AVG_ERR_MT_INIT,
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string("Linux multitouch event source: Could not open mtdev '")+
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sDevice+"'. "+strerror(errno)+".");
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input_absinfo* pAbsInfo;
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pAbsInfo = &(m_pMTDevice->caps.abs[MTDEV_POSITION_X]);
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m_Dimensions.tl.x = pAbsInfo->minimum;
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m_Dimensions.br.x = pAbsInfo->maximum;
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pAbsInfo = &(m_pMTDevice->caps.abs[MTDEV_POSITION_Y]);
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m_Dimensions.tl.y = pAbsInfo->minimum;
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m_Dimensions.br.y = pAbsInfo->maximum;
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MultitouchInputDevice::start();
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AVG_TRACE(Logger::CONFIG, "Linux MTDev Multitouch event source created.");
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std::vector<EventPtr> LibMTDevInputDevice::pollEvents()
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struct input_event event;
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static int curSlot = 0;
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while (mtdev_get(m_pMTDevice, m_DeviceFD, &event, 1) > 0) {
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if (event.type == EV_SYN && event.code == SYN_REPORT) {
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// cerr << ">> SYN_REPORT" << endl;
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processEvents(changedIDs);
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} else if (event.type == EV_ABS && event.code == ABS_MT_SLOT) {
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// cerr << ">> slot " << event.value << endl;
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curSlot = event.value;
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switch (event.code) {
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case ABS_MT_TRACKING_ID:
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// cerr << ">> ABS_MT_TRACKING_ID: " << event.value << endl;
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pTouch = &(m_Slots[curSlot]);
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if (event.value == -1) {
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TouchStatusPtr pTouchStatus = getTouchStatus(pTouch->id);
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// cerr << "up " << pTouch->id << endl;
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// cerr << " --> remove" << endl;
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TouchEventPtr pOldEvent = pTouchStatus->getLastEvent();
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TouchEventPtr pUpEvent =
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boost::dynamic_pointer_cast<TouchEvent>(
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pOldEvent->cloneAs(Event::CURSORUP));
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pTouchStatus->pushEvent(pUpEvent);
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removeTouchStatus(pTouch->id);
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pTouch->id = event.value;
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changedIDs.insert(curSlot);
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case ABS_MT_POSITION_X:
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// cerr << ">> ABS_MT_POSITION_X: " << event.value << endl;
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pTouch = &(m_Slots[curSlot]);
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pTouch->pos.x = event.value;
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changedIDs.insert(curSlot);
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case ABS_MT_POSITION_Y:
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// cerr << ">> ABS_MT_POSITION_Y: " << event.value << endl;
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pTouch = &(m_Slots[curSlot]);
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pTouch->pos.y = event.value;
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changedIDs.insert(curSlot);
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return MultitouchInputDevice::pollEvents();
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void LibMTDevInputDevice::processEvents(const set<int>& changedIDs)
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for (set<int>::iterator it = changedIDs.begin(); it != changedIDs.end(); ++it) {
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map<int, TouchData>::iterator it2 = m_Slots.find(*it);
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if (it2 != m_Slots.end()) {
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const TouchData& touch = it2->second;
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// cerr << "slot: " << *it << ", id: " << touch.id << ", pos: " << touch.pos
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// AVG_ASSERT(touch.pos.x != 0);
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if (touch.id != -1) {
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TouchStatusPtr pTouchStatus = getTouchStatus(touch.id);
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TouchEventPtr pEvent = createEvent(m_LastID, Event::CURSORDOWN,
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// cerr << "down <" << touch.id << "> --> [" << m_LastID << "]" << endl;
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addTouchStatus((long)touch.id, pEvent);
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// cerr << "move <" << touch.id << "> --> " << touch.pos << endl;
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TouchEventPtr pEvent = createEvent(0, Event::CURSORMOTION, touch.pos);
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pTouchStatus->pushEvent(pEvent);
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TouchEventPtr LibMTDevInputDevice::createEvent(int id, Event::Type type, IntPoint pos)
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DPoint size = getWindowSize();
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DPoint normPos = DPoint(double(pos.x-m_Dimensions.tl.x)/m_Dimensions.width(),
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double(pos.y-m_Dimensions.tl.y)/m_Dimensions.height());
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IntPoint screenPos(int(normPos.x*size.x+0.5), int(normPos.y*size.y+0.5));
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return TouchEventPtr(new TouchEvent(id, type, screenPos, Event::TOUCH));
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removed
src/player/LibMTDevInputDevice.cpp
