int get_events_val(ECOM_ValueTypeDef *data)
{
struct input_event acc_event;
struct input_event mag_event;
int ret;
while(1) {
ret = read(acc_event_fd, &acc_event, sizeof(struct input_event));
if (ret != sizeof(struct input_event))
continue;
if(acc_event.type == EV_ABS) {
if(acc_event.code == ABS_X)
data->ax = acc_event.value;
if(acc_event.code == ABS_Y)
data->ay = acc_event.value;
if(acc_event.code == ABS_Z)
data->az = acc_event.value;
}
if(acc_event.type == 0)
break;
}
while(1) {
ret = read(mag_event_fd, &mag_event, sizeof(struct input_event));
if (ret != sizeof(struct input_event))
continue;
if(mag_event.type == EV_ABS) {
if(mag_event.code == ABS_X)
data->mx = mag_event.value;
if(mag_event.code == ABS_Y)
data->my = mag_event.value;
if(mag_event.code == ABS_Z)
data->mz = mag_event.value;
}
if(mag_event.type == 0)
break;
}
data->time = data__now_ns()/1000000;
LOGD_IF(0, "%s %d %d %d %d %d %d %d\n", __FUNCTION__, data->ax, data->ay, data->az, data->mx, data->my, data->mz, data->time);
return 0;
}
static int
data__poll(struct sensors_poll_device_t *dev, sensors_event_t* values)
{
SensorPoll* data = (void*)dev;
int fd = data->events_fd;
D("%s: data=%p", __FUNCTION__, dev);
// there are pending sensors, returns them now...
if (data->pendingSensors) {
return pick_sensor(data, values);
}
// wait until we get a complete event for an enabled sensor
uint32_t new_sensors = 0;
while (1) {
/* read the next event */
char buff[256];
int len = qemud_channel_recv(data->events_fd, buff, sizeof buff-1);
float params[3];
int64_t event_time;
if (len < 0) {
E("%s: len=%d, errno=%d: %s", __FUNCTION__, len, errno, strerror(errno));
return -errno;
}
buff[len] = 0;
/* "wake" is sent from the emulator to exit this loop. */
if (!strcmp((const char*)data, "wake")) {
return 0x7FFFFFFF;
}
/* "acceleration:<x>:<y>:<z>" corresponds to an acceleration event */
if (sscanf(buff, "acceleration:%g:%g:%g", params+0, params+1, params+2) == 3) {
new_sensors |= SENSORS_ACCELERATION;
data->sensors[ID_ACCELERATION].acceleration.x = params[0];
data->sensors[ID_ACCELERATION].acceleration.y = params[1];
data->sensors[ID_ACCELERATION].acceleration.z = params[2];
continue;
}
/* "orientation:<azimuth>:<pitch>:<roll>" is sent when orientation changes */
if (sscanf(buff, "orientation:%g:%g:%g", params+0, params+1, params+2) == 3) {
new_sensors |= SENSORS_ORIENTATION;
data->sensors[ID_ORIENTATION].orientation.azimuth = params[0];
data->sensors[ID_ORIENTATION].orientation.pitch = params[1];
data->sensors[ID_ORIENTATION].orientation.roll = params[2];
data->sensors[ID_ORIENTATION].orientation.status = SENSOR_STATUS_ACCURACY_HIGH;
continue;
}
/* "magnetic:<x>:<y>:<z>" is sent for the params of the magnetic field */
if (sscanf(buff, "magnetic:%g:%g:%g", params+0, params+1, params+2) == 3) {
new_sensors |= SENSORS_MAGNETIC_FIELD;
data->sensors[ID_MAGNETIC_FIELD].magnetic.x = params[0];
data->sensors[ID_MAGNETIC_FIELD].magnetic.y = params[1];
data->sensors[ID_MAGNETIC_FIELD].magnetic.z = params[2];
data->sensors[ID_MAGNETIC_FIELD].magnetic.status = SENSOR_STATUS_ACCURACY_HIGH;
continue;
}
/* "temperature:<celsius>" */
if (sscanf(buff, "temperature:%g", params+0) == 1) {
new_sensors |= SENSORS_TEMPERATURE;
data->sensors[ID_TEMPERATURE].temperature = params[0];
continue;
}
/* "proximity:<value>" */
if (sscanf(buff, "proximity:%g", params+0) == 1) {
new_sensors |= SENSORS_PROXIMITY;
data->sensors[ID_PROXIMITY].distance = params[0];
continue;
}
/* "sync:<time>" is sent after a series of sensor events.
* where 'time' is expressed in micro-seconds and corresponds
* to the VM time when the real poll occured.
*/
if (sscanf(buff, "sync:%lld", &event_time) == 1) {
if (new_sensors) {
data->pendingSensors = new_sensors;
int64_t t = event_time * 1000LL; /* convert to nano-seconds */
/* use the time at the first sync: as the base for later
* time values */
if (data->timeStart == 0) {
data->timeStart = data__now_ns();
data->timeOffset = data->timeStart - t;
}
t += data->timeOffset;
while (new_sensors) {
uint32_t i = 31 - __builtin_clz(new_sensors);
new_sensors &= ~(1<<i);
data->sensors[i].timestamp = t;
}
return pick_sensor(data, values);
} else {
D("huh ? sync without any sensor data ?");
}
continue;
}
D("huh ? unsupported command");
}
return -1;
}