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/*****************************************************************************
*
* mtdev - Multitouch Protocol Translation Library (MIT license)
*
* Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
* Copyright (C) 2010 Canonical Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
****************************************************************************/
#include <mtdev.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
/* year-proof millisecond event time */
typedef __u64 mstime_t;
static int use_event(const struct input_event *ev)
{
#if 0
return ev->type == EV_ABS && mtdev_is_absmt(ev->code);
#else
return 1;
#endif
}
static void print_event(const struct input_event *ev)
{
static const mstime_t ms = 1000;
static int slot;
mstime_t evtime = ev->time.tv_usec / ms + ev->time.tv_sec * ms;
if (ev->type == EV_ABS && ev->code == ABS_MT_SLOT)
slot = ev->value;
fprintf(stderr, "%012llx %02d %01d %04x %d\n",
evtime, slot, ev->type, ev->code, ev->value);
}
#define CHECK(dev, name) \
if (mtdev_has_mt_event(dev, name)) \
fprintf(stderr, " %s\n", #name)
static void show_props(const struct mtdev *dev)
{
fprintf(stderr, "supported mt events:\n");
CHECK(dev, ABS_MT_SLOT);
CHECK(dev, ABS_MT_TOUCH_MAJOR);
CHECK(dev, ABS_MT_TOUCH_MINOR);
CHECK(dev, ABS_MT_WIDTH_MAJOR);
CHECK(dev, ABS_MT_WIDTH_MINOR);
CHECK(dev, ABS_MT_ORIENTATION);
CHECK(dev, ABS_MT_POSITION_X);
CHECK(dev, ABS_MT_POSITION_Y);
CHECK(dev, ABS_MT_TOOL_TYPE);
CHECK(dev, ABS_MT_BLOB_ID);
CHECK(dev, ABS_MT_TRACKING_ID);
CHECK(dev, ABS_MT_PRESSURE);
CHECK(dev, ABS_MT_DISTANCE);
}
static void loop_device(int fd)
{
struct mtdev dev;
struct input_event ev;
int ret = mtdev_open(&dev, fd);
if (ret) {
fprintf(stderr, "error: could not open device: %d\n", ret);
return;
}
show_props(&dev);
/* while the device has not been inactive for five seconds */
while (!mtdev_idle(&dev, fd, 5000)) {
/* extract all available processed events */
while (mtdev_get(&dev, fd, &ev, 1) > 0) {
if (use_event(&ev))
print_event(&ev);
}
}
mtdev_close(&dev);
}
int main(int argc, char *argv[])
{
int fd;
if (argc < 2) {
fprintf(stderr, "Usage: mtdev <device>\n");
return -1;
}
fd = open(argv[1], O_RDONLY | O_NONBLOCK);
if (fd < 0) {
fprintf(stderr, "error: could not open device\n");
return -1;
}
if (ioctl(fd, EVIOCGRAB, 1)) {
fprintf(stderr, "error: could not grab the device\n");
return -1;
}
loop_device(fd);
ioctl(fd, EVIOCGRAB, 0);
close(fd);
return 0;
}
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