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/*
* Copyright 2008, The Android Open Source Project
*
* 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.
*/
#define LOG_TAG "SensorManager"
#include "utils/Log.h"
#include <gui/Sensor.h>
#include <gui/SensorManager.h>
#include <gui/SensorEventQueue.h>
#include "jni.h"
#include "JNIHelp.h"
namespace android {
struct SensorOffsets
{
jfieldID name;
jfieldID vendor;
jfieldID version;
jfieldID handle;
jfieldID type;
jfieldID range;
jfieldID resolution;
jfieldID power;
jfieldID minDelay;
} gSensorOffsets;
/*
* The method below are not thread-safe and not intended to be
*/
static jint
sensors_module_init(JNIEnv *env, jclass clazz)
{
SensorManager::getInstance();
return 0;
}
static jint
sensors_module_get_next_sensor(JNIEnv *env, jobject clazz, jobject sensor, jint next)
{
SensorManager& mgr(SensorManager::getInstance());
Sensor const* const* sensorList;
size_t count = mgr.getSensorList(&sensorList);
if (size_t(next) >= count)
return -1;
Sensor const* const list = sensorList[next];
const SensorOffsets& sensorOffsets(gSensorOffsets);
jstring name = env->NewStringUTF(list->getName().string());
jstring vendor = env->NewStringUTF(list->getVendor().string());
env->SetObjectField(sensor, sensorOffsets.name, name);
env->SetObjectField(sensor, sensorOffsets.vendor, vendor);
env->SetIntField(sensor, sensorOffsets.version, list->getVersion());
env->SetIntField(sensor, sensorOffsets.handle, list->getHandle());
env->SetIntField(sensor, sensorOffsets.type, list->getType());
env->SetFloatField(sensor, sensorOffsets.range, list->getMaxValue());
env->SetFloatField(sensor, sensorOffsets.resolution, list->getResolution());
env->SetFloatField(sensor, sensorOffsets.power, list->getPowerUsage());
env->SetIntField(sensor, sensorOffsets.minDelay, list->getMinDelay());
next++;
return size_t(next) < count ? next : 0;
}
//----------------------------------------------------------------------------
static jint
sensors_create_queue(JNIEnv *env, jclass clazz)
{
SensorManager& mgr(SensorManager::getInstance());
sp<SensorEventQueue> queue(mgr.createEventQueue());
queue->incStrong(clazz);
return reinterpret_cast<int>(queue.get());
}
static void
sensors_destroy_queue(JNIEnv *env, jclass clazz, jint nativeQueue)
{
sp<SensorEventQueue> queue(reinterpret_cast<SensorEventQueue *>(nativeQueue));
if (queue != 0) {
queue->decStrong(clazz);
}
}
static jboolean
sensors_enable_sensor(JNIEnv *env, jclass clazz,
jint nativeQueue, jstring name, jint sensor, jint delay)
{
sp<SensorEventQueue> queue(reinterpret_cast<SensorEventQueue *>(nativeQueue));
if (queue == 0) return JNI_FALSE;
status_t res;
if (delay >= 0) {
res = queue->enableSensor(sensor, delay);
} else {
res = queue->disableSensor(sensor);
}
return res == NO_ERROR ? true : false;
}
static jint
sensors_data_poll(JNIEnv *env, jclass clazz, jint nativeQueue,
jfloatArray values, jintArray status, jlongArray timestamp)
{
sp<SensorEventQueue> queue(reinterpret_cast<SensorEventQueue *>(nativeQueue));
if (queue == 0) return -1;
status_t res;
ASensorEvent event;
res = queue->read(&event, 1);
if (res == 0) {
res = queue->waitForEvent();
if (res != NO_ERROR)
return -1;
// here we're guaranteed to have an event
res = queue->read(&event, 1);
ALOGE_IF(res==0, "sensors_data_poll: nothing to read after waitForEvent()");
}
if (res <= 0) {
return -1;
}
jint accuracy = event.vector.status;
env->SetFloatArrayRegion(values, 0, 3, event.vector.v);
env->SetIntArrayRegion(status, 0, 1, &accuracy);
env->SetLongArrayRegion(timestamp, 0, 1, &event.timestamp);
return event.sensor;
}
static void
nativeClassInit (JNIEnv *_env, jclass _this)
{
jclass sensorClass = _env->FindClass("android/hardware/Sensor");
SensorOffsets& sensorOffsets = gSensorOffsets;
sensorOffsets.name = _env->GetFieldID(sensorClass, "mName", "Ljava/lang/String;");
sensorOffsets.vendor = _env->GetFieldID(sensorClass, "mVendor", "Ljava/lang/String;");
sensorOffsets.version = _env->GetFieldID(sensorClass, "mVersion", "I");
sensorOffsets.handle = _env->GetFieldID(sensorClass, "mHandle", "I");
sensorOffsets.type = _env->GetFieldID(sensorClass, "mType", "I");
sensorOffsets.range = _env->GetFieldID(sensorClass, "mMaxRange", "F");
sensorOffsets.resolution = _env->GetFieldID(sensorClass, "mResolution","F");
sensorOffsets.power = _env->GetFieldID(sensorClass, "mPower", "F");
sensorOffsets.minDelay = _env->GetFieldID(sensorClass, "mMinDelay", "I");
}
static JNINativeMethod gMethods[] = {
{"nativeClassInit", "()V", (void*)nativeClassInit },
{"sensors_module_init","()I", (void*)sensors_module_init },
{"sensors_module_get_next_sensor","(Landroid/hardware/Sensor;I)I",
(void*)sensors_module_get_next_sensor },
{"sensors_create_queue", "()I", (void*)sensors_create_queue },
{"sensors_destroy_queue", "(I)V", (void*)sensors_destroy_queue },
{"sensors_enable_sensor", "(ILjava/lang/String;II)Z",
(void*)sensors_enable_sensor },
{"sensors_data_poll", "(I[F[I[J)I", (void*)sensors_data_poll },
};
}; // namespace android
using namespace android;
int register_android_hardware_SensorManager(JNIEnv *env)
{
return jniRegisterNativeMethods(env, "android/hardware/SystemSensorManager",
gMethods, NELEM(gMethods));
}
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