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Diffstat (limited to 'camera/SensorListener.cpp')
| -rw-r--r-- | camera/SensorListener.cpp | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/camera/SensorListener.cpp b/camera/SensorListener.cpp new file mode 100644 index 0000000..e53fa83 --- /dev/null +++ b/camera/SensorListener.cpp @@ -0,0 +1,236 @@ +/* + * Copyright (C) Texas Instruments - http://www.ti.com/ + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** +* @file SensorListener.cpp +* +* This file listens and propogates sensor events to CameraHal. +* +*/ + +#include "SensorListener.h" + +#include <stdint.h> +#include <math.h> +#include <sys/types.h> + +namespace Ti { +namespace Camera { + +/*** static declarations ***/ +static const float RADIANS_2_DEG = (float) (180 / M_PI); +// measured values on device...might need tuning +static const int DEGREES_90_THRESH = 50; +static const int DEGREES_180_THRESH = 170; +static const int DEGREES_270_THRESH = 250; + +static int sensor_events_listener(int fd, int events, void* data) +{ + SensorListener* listener = (SensorListener*) data; + ssize_t num_sensors; + ASensorEvent sen_events[8]; + while ((num_sensors = listener->mSensorEventQueue->read(sen_events, 8)) > 0) { + for (int i = 0; i < num_sensors; i++) { + if (sen_events[i].type == android::Sensor::TYPE_ACCELEROMETER) { + float x = sen_events[i].vector.azimuth; + float y = sen_events[i].vector.pitch; + float z = sen_events[i].vector.roll; + float radius = 0; + int tilt = 0, orient = 0; + + CAMHAL_LOGVA("ACCELEROMETER EVENT"); + CAMHAL_LOGVB(" azimuth = %f pitch = %f roll = %f", + sen_events[i].vector.azimuth, + sen_events[i].vector.pitch, + sen_events[i].vector.roll); + // see http://en.wikipedia.org/wiki/Spherical_coordinate_system#Cartesian_coordinates + // about conversion from cartesian to spherical for orientation calculations + radius = (float) sqrt(x * x + y * y + z * z); + tilt = (int) asinf(z / radius) * RADIANS_2_DEG; + orient = (int) atan2f(-x, y) * RADIANS_2_DEG; + + if (orient < 0) { + orient += 360; + } + + if (orient >= DEGREES_270_THRESH) { + orient = 270; + } else if (orient >= DEGREES_180_THRESH) { + orient = 180; + } else if (orient >= DEGREES_90_THRESH) { + orient = 90; + } else { + orient = 0; + } + listener->handleOrientation(orient, tilt); + CAMHAL_LOGVB(" tilt = %d orientation = %d", tilt, orient); + } else if (sen_events[i].type == android::Sensor::TYPE_GYROSCOPE) { + CAMHAL_LOGVA("GYROSCOPE EVENT"); + } + } + } + + if (num_sensors < 0 && num_sensors != -EAGAIN) { + CAMHAL_LOGEB("reading events failed: %s", strerror(-num_sensors)); + } + + return 1; +} + +/****** public - member functions ******/ +SensorListener::SensorListener() { + LOG_FUNCTION_NAME; + + sensorsEnabled = 0; + mOrientationCb = NULL; + mSensorEventQueue = NULL; + mSensorLooperThread = NULL; + + LOG_FUNCTION_NAME_EXIT; +} + +SensorListener::~SensorListener() { + LOG_FUNCTION_NAME; + + CAMHAL_LOGDA("Kill looper thread"); + if (mSensorLooperThread.get()) { + // 1. Request exit + // 2. Wake up looper which should be polling for an event + // 3. Wait for exit + mSensorLooperThread->requestExit(); + mSensorLooperThread->wake(); + mSensorLooperThread->join(); + mSensorLooperThread.clear(); + mSensorLooperThread = NULL; + } + + CAMHAL_LOGDA("Kill looper"); + if (mLooper.get()) { + mLooper->removeFd(mSensorEventQueue->getFd()); + mLooper.clear(); + mLooper = NULL; + } + CAMHAL_LOGDA("SensorListener destroyed"); + + LOG_FUNCTION_NAME_EXIT; +} + +status_t SensorListener::initialize() { + status_t ret = NO_ERROR; + android::SensorManager& mgr(android::SensorManager::getInstance()); + + LOG_FUNCTION_NAME; + + android::sp<android::Looper> mLooper; + + mSensorEventQueue = mgr.createEventQueue(); + if (mSensorEventQueue == NULL) { + CAMHAL_LOGEA("createEventQueue returned NULL"); + ret = NO_INIT; + goto out; + } + + mLooper = new android::Looper(false); + mLooper->addFd(mSensorEventQueue->getFd(), 0, ALOOPER_EVENT_INPUT, sensor_events_listener, this); + + if (mSensorLooperThread.get() == NULL) + mSensorLooperThread = new SensorLooperThread(mLooper.get()); + + if (mSensorLooperThread.get() == NULL) { + CAMHAL_LOGEA("Couldn't create sensor looper thread"); + ret = NO_MEMORY; + goto out; + } + + ret = mSensorLooperThread->run("sensor looper thread", android::PRIORITY_URGENT_DISPLAY); + if (ret == INVALID_OPERATION){ + CAMHAL_LOGDA("thread already running ?!?"); + } else if (ret != NO_ERROR) { + CAMHAL_LOGEA("couldn't run thread"); + goto out; + } + + out: + LOG_FUNCTION_NAME_EXIT; + return ret; +} + +void SensorListener::setCallbacks(orientation_callback_t orientation_cb, void *cookie) { + LOG_FUNCTION_NAME; + + if (orientation_cb) { + mOrientationCb = orientation_cb; + } + mCbCookie = cookie; + + LOG_FUNCTION_NAME_EXIT; +} + +void SensorListener::handleOrientation(uint32_t orientation, uint32_t tilt) { + LOG_FUNCTION_NAME; + + android::AutoMutex lock(&mLock); + + if (mOrientationCb && (sensorsEnabled & SENSOR_ORIENTATION)) { + mOrientationCb(orientation, tilt, mCbCookie); + } + + LOG_FUNCTION_NAME_EXIT; +} + +void SensorListener::enableSensor(sensor_type_t type) { + android::Sensor const* sensor; + android::SensorManager& mgr(android::SensorManager::getInstance()); + + LOG_FUNCTION_NAME; + + android::AutoMutex lock(&mLock); + + if ((type & SENSOR_ORIENTATION) && !(sensorsEnabled & SENSOR_ORIENTATION)) { + sensor = mgr.getDefaultSensor(android::Sensor::TYPE_ACCELEROMETER); + if(sensor) { + CAMHAL_LOGDB("orientation = %p (%s)", sensor, sensor->getName().string()); + mSensorEventQueue->enableSensor(sensor); + mSensorEventQueue->setEventRate(sensor, ms2ns(100)); + sensorsEnabled |= SENSOR_ORIENTATION; + } else { + CAMHAL_LOGDB("not enabling absent orientation sensor"); + } + } + + LOG_FUNCTION_NAME_EXIT; +} + +void SensorListener::disableSensor(sensor_type_t type) { + android::Sensor const* sensor; + android::SensorManager& mgr(android::SensorManager::getInstance()); + + LOG_FUNCTION_NAME; + + android::AutoMutex lock(&mLock); + + if ((type & SENSOR_ORIENTATION) && (sensorsEnabled & SENSOR_ORIENTATION)) { + sensor = mgr.getDefaultSensor(android::Sensor::TYPE_ACCELEROMETER); + CAMHAL_LOGDB("orientation = %p (%s)", sensor, sensor->getName().string()); + mSensorEventQueue->disableSensor(sensor); + sensorsEnabled &= ~SENSOR_ORIENTATION; + } + + LOG_FUNCTION_NAME_EXIT; +} + +} // namespace Camera +} // namespace Ti |