mirror of
https://github.com/openharmony/third_party_mtdev.git
synced 2026-07-21 06:25:23 -04:00
mamingshuai
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*****************************************************************************
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*
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* mtdev - Multitouch Protocol Translation Library (MIT license)
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*
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* Copyright (C) 2010 Henrik Rydberg <rydberg@euromail.se>
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* Copyright (C) 2010 Canonical Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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****************************************************************************/
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#include <mtdev.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdint.h>
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#ifndef input_event_sec
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#define input_event_sec time.tv_sec
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#define input_event_usec time.tv_usec
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#endif
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/* year-proof millisecond event time */
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typedef uint64_t mstime_t;
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static int use_event(const struct input_event *ev)
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{
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#if 0
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return ev->type == EV_ABS && mtdev_is_absmt(ev->code);
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#else
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return 1;
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#endif
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}
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static void print_event(const struct input_event *ev)
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{
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static const mstime_t ms = 1000;
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static int slot;
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mstime_t evtime = ev->input_event_usec / ms + ev->input_event_sec * ms;
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if (ev->type == EV_ABS && ev->code == ABS_MT_SLOT)
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slot = ev->value;
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fprintf(stderr, "%012llx %02d %01d %04x %d\n",
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evtime, slot, ev->type, ev->code, ev->value);
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}
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#define CHECK(dev, name) \
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if (mtdev_has_mt_event(dev, name)) \
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fprintf(stderr, " %s\n", #name)
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static void show_props(const struct mtdev *dev)
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{
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fprintf(stderr, "supported mt events:\n");
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CHECK(dev, ABS_MT_SLOT);
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CHECK(dev, ABS_MT_TOUCH_MAJOR);
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CHECK(dev, ABS_MT_TOUCH_MINOR);
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CHECK(dev, ABS_MT_WIDTH_MAJOR);
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CHECK(dev, ABS_MT_WIDTH_MINOR);
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CHECK(dev, ABS_MT_ORIENTATION);
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CHECK(dev, ABS_MT_POSITION_X);
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CHECK(dev, ABS_MT_POSITION_Y);
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CHECK(dev, ABS_MT_TOOL_TYPE);
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CHECK(dev, ABS_MT_BLOB_ID);
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CHECK(dev, ABS_MT_TRACKING_ID);
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CHECK(dev, ABS_MT_PRESSURE);
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CHECK(dev, ABS_MT_DISTANCE);
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}
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static void loop_device(int fd)
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{
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struct mtdev dev;
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struct input_event ev;
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int ret = mtdev_open(&dev, fd);
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if (ret) {
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fprintf(stderr, "error: could not open device: %d\n", ret);
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return;
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}
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show_props(&dev);
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/* while the device has not been inactive for five seconds */
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while (!mtdev_idle(&dev, fd, 5000)) {
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/* extract all available processed events */
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while (mtdev_get(&dev, fd, &ev, 1) > 0) {
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if (use_event(&ev))
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print_event(&ev);
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}
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}
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mtdev_close(&dev);
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}
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int main(int argc, char *argv[])
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{
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int fd;
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if (argc < 2) {
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fprintf(stderr, "Usage: mtdev <device>\n");
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return -1;
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}
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fd = open(argv[1], O_RDONLY | O_NONBLOCK);
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if (fd < 0) {
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fprintf(stderr, "error: could not open device\n");
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return -1;
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}
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if (ioctl(fd, EVIOCGRAB, 1)) {
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fprintf(stderr, "error: could not grab the device\n");
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return -1;
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}
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loop_device(fd);
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ioctl(fd, EVIOCGRAB, 0);
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close(fd);
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return 0;
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}
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