SensorEventQueue.cpp revision e6f43ddce78d6846af12550ff9193c5c6fe5844b
1589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian/* 2589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Copyright (C) 2010 The Android Open Source Project 3589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 4589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Licensed under the Apache License, Version 2.0 (the "License"); 5589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * you may not use this file except in compliance with the License. 6589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * You may obtain a copy of the License at 7589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 8589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * http://www.apache.org/licenses/LICENSE-2.0 9589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * 10589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * Unless required by applicable law or agreed to in writing, software 11589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * distributed under the License is distributed on an "AS IS" BASIS, 12589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * See the License for the specific language governing permissions and 14589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian * limitations under the License. 15589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian */ 16a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 17a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian#define LOG_TAG "Sensors" 18a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 19589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <stdint.h> 20589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <sys/types.h> 21589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 22589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/Errors.h> 23589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <utils/RefBase.h> 2459abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown#include <utils/Looper.h> 25589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 26589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/Sensor.h> 275cae0d0699a169e468fff3e21165f35db12f2cdeMathias Agopian#include <gui/BitTube.h> 28589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/SensorEventQueue.h> 29589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <gui/ISensorEventConnection.h> 30589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 31589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian#include <android/sensor.h> 32589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 33589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 34589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopiannamespace android { 35589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 36589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 37589ce85ee4174829cfedce91b6b2509d2a4002ebMathias AgopianSensorEventQueue::SensorEventQueue(const sp<ISensorEventConnection>& connection) 38589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian : mSensorEventConnection(connection) 39589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 40589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 41589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 42589ce85ee4174829cfedce91b6b2509d2a4002ebMathias AgopianSensorEventQueue::~SensorEventQueue() 43589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 44589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 45589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 46589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianvoid SensorEventQueue::onFirstRef() 47589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 48589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian mSensorChannel = mSensorEventConnection->getSensorChannel(); 49589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 50589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 51589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianint SensorEventQueue::getFd() const 52589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 53589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorChannel->getFd(); 54589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 55589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 56589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianssize_t SensorEventQueue::write(ASensorEvent const* events, size_t numEvents) 57589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 58589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian ssize_t size = mSensorChannel->write(events, numEvents * sizeof(events[0])); 59589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size >= 0) { 60589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size % sizeof(events[0])) { 61589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // partial write!!! should never happen. 62589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return -EINVAL; 63589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 64589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // returns number of events written 65589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian size /= sizeof(events[0]); 66589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 67589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return size; 68589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 69589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 70589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopianssize_t SensorEventQueue::read(ASensorEvent* events, size_t numEvents) 71589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 72589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian ssize_t size = mSensorChannel->read(events, numEvents*sizeof(events[0])); 73e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE_IF(size<0 && size!=-EAGAIN, 74aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian "SensorChannel::read error (%s)", strerror(-size)); 75589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size >= 0) { 76589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian if (size % sizeof(events[0])) { 77a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian // partial read!!! should never happen. 78e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("SensorEventQueue partial read (event-size=%u, read=%d)", 79aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian sizeof(events[0]), int(size)); 80589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return -EINVAL; 81589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 82589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian // returns number of events read 83589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian size /= sizeof(events[0]); 84589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian } 85589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return size; 86589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 87589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 8859abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brownsp<Looper> SensorEventQueue::getLooper() const 89589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 90a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian Mutex::Autolock _l(mLock); 9159abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown if (mLooper == 0) { 9259abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown mLooper = new Looper(true); 9359abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown mLooper->addFd(getFd(), getFd(), ALOOPER_EVENT_INPUT, NULL, NULL); 94a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian } 9559abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown return mLooper; 96589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 97589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 98a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::waitForEvent() const 99589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 100a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian const int fd = getFd(); 10159abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown sp<Looper> looper(getLooper()); 102aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian 103aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian int32_t result; 104aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian do { 105aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian result = looper->pollOnce(-1); 106aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian if (result == ALOOPER_EVENT_ERROR) { 107e6f43ddce78d6846af12550ff9193c5c6fe5844bSteve Block ALOGE("SensorEventQueue::waitForEvent error (errno=%d)", errno); 108aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian result = -EPIPE; // unknown error, so we make up one 109aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian break; 110aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian } 111aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian } while (result != fd); 112aeda9afdba5c28d4d152e3ec3bce74be42949065Mathias Agopian 1132ffb24799e579c47a73c992ab567f05c4bf0c962Mathias Agopian return (result == fd) ? status_t(NO_ERROR) : result; 114589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 115589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 116a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::wake() const 117589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian{ 11859abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown sp<Looper> looper(getLooper()); 11959abe7e0909bf4b7bf7b9601e1e40a05f6d4fd8aJeff Brown looper->wake(); 120a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian return NO_ERROR; 121a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 122a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 123a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::enableSensor(Sensor const* sensor) const { 124a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian return mSensorEventConnection->enableDisable(sensor->getHandle(), true); 125a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 126a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 127a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::disableSensor(Sensor const* sensor) const { 128a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian return mSensorEventConnection->enableDisable(sensor->getHandle(), false); 129a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 130a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 131a48bcf62b6a26f24a0bdd2b44bb39fadce499e92Mathias Agopianstatus_t SensorEventQueue::enableSensor(int32_t handle, int32_t us) const { 132e3c8234765050023b8a588607f819e8cc41a6363Mathias Agopian status_t err = mSensorEventConnection->enableDisable(handle, true); 133e3c8234765050023b8a588607f819e8cc41a6363Mathias Agopian if (err == NO_ERROR) { 134a48bcf62b6a26f24a0bdd2b44bb39fadce499e92Mathias Agopian mSensorEventConnection->setEventRate(handle, us2ns(us)); 135e3c8234765050023b8a588607f819e8cc41a6363Mathias Agopian } 136e3c8234765050023b8a588607f819e8cc41a6363Mathias Agopian return err; 137a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 138a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 139a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::disableSensor(int32_t handle) const { 140a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian return mSensorEventConnection->enableDisable(handle, false); 141a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian} 142a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopian 143a7352c9f4a6e642c29782b19db5bc0bd98feddc8Mathias Agopianstatus_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const { 144589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian return mSensorEventConnection->setEventRate(sensor->getHandle(), ns); 145589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian} 146589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 147589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian// ---------------------------------------------------------------------------- 148589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian}; // namespace android 149589ce85ee4174829cfedce91b6b2509d2a4002ebMathias Agopian 150