diff options
Diffstat (limited to 'src/plugins/sensors/android/src/androidjnisensors.cpp')
| -rw-r--r-- | src/plugins/sensors/android/src/androidjnisensors.cpp | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/plugins/sensors/android/src/androidjnisensors.cpp b/src/plugins/sensors/android/src/androidjnisensors.cpp new file mode 100644 index 00000000..6365433c --- /dev/null +++ b/src/plugins/sensors/android/src/androidjnisensors.cpp @@ -0,0 +1,245 @@ +/**************************************************************************** +** +** Copyright (C) 2013 BogDan Vatra <bogdan@kde.org> +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtSensors module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <qglobal.h> +#include <android/log.h> +#include <QtCore/QReadWriteLock> +#include <QtCore/QHash> + +#include "androidjnisensors.h" + +static JavaVM *javaVM = 0; +jclass sensorsClass; + +static jmethodID getSensorListMethodId; +static jmethodID registerSensorMethodId; +static jmethodID unregisterSensorMethodId; +static jmethodID getSensorDescriptionMethodId; + +static QHash<int, QList<AndroidSensors::AndroidSensorsListenerInterface *> > listenersHash; +QReadWriteLock listenersLocker; +enum { + SENSOR_DELAY_FASTEST = 0, + SENSOR_DELAY_GAME = 1, + SENSOR_DELAY_NORMAL = 3, + SENSOR_DELAY_UI =2 +}; +namespace AndroidSensors +{ + struct AttachedJNIEnv + { + AttachedJNIEnv() + { + attached = false; + if (javaVM->GetEnv((void**)&jniEnv, JNI_VERSION_1_6) < 0) { + if (javaVM->AttachCurrentThread(&jniEnv, NULL) < 0) { + __android_log_print(ANDROID_LOG_ERROR, "Qt", "AttachCurrentThread failed"); + jniEnv = 0; + return; + } + attached = true; + } + } + + ~AttachedJNIEnv() + { + if (attached) + javaVM->DetachCurrentThread(); + } + bool attached; + JNIEnv *jniEnv; + }; + + QVector<AndroidSensorType> availableSensors() + { + QVector<AndroidSensorType> ret; + AttachedJNIEnv aenv; + if (!aenv.jniEnv) + return ret; + jintArray jsensors = static_cast<jintArray>(aenv.jniEnv->CallStaticObjectMethod(sensorsClass, + getSensorListMethodId)); + jint *sensors = aenv.jniEnv->GetIntArrayElements(jsensors, 0); + const uint sz = aenv.jniEnv->GetArrayLength(jsensors); + for (uint i = 0; i < sz; i++) + ret.push_back(AndroidSensorType(sensors[i])); + aenv.jniEnv->ReleaseIntArrayElements(jsensors, sensors, 0); + return ret; + } + + QString sensorDescription(AndroidSensorType sensor) + { + AttachedJNIEnv aenv; + if (!aenv.jniEnv) + return QString(); + jstring jstr = static_cast<jstring>(aenv.jniEnv->CallStaticObjectMethod(sensorsClass, + getSensorDescriptionMethodId, + jint(sensor))); + const jchar *pstr = aenv.jniEnv->GetStringChars(jstr, 0); + QString ret(reinterpret_cast<const QChar *>(pstr), aenv.jniEnv->GetStringLength(jstr)); + aenv.jniEnv->ReleaseStringChars(jstr, pstr); + aenv.jniEnv->DeleteLocalRef(jstr); + return ret; + } + + bool registerListener(AndroidSensorType sensor, AndroidSensorsListenerInterface *listener, int dataRate) + { + listenersLocker.lockForWrite(); + bool startService = listenersHash[sensor].empty(); + listenersHash[sensor].push_back(listener); + listenersLocker.unlock(); + if (startService) { + AttachedJNIEnv aenv; + if (!aenv.jniEnv) + return false; + int rate = dataRate > 0 ? 1000000/dataRate : SENSOR_DELAY_GAME; + return aenv.jniEnv->CallStaticBooleanMethod(sensorsClass, + registerSensorMethodId, + jint(sensor), + jint(rate)); + } + return true; + } + + bool unregisterListener(AndroidSensorType sensor, AndroidSensorsListenerInterface *listener) + { + listenersLocker.lockForWrite(); + listenersHash[sensor].removeOne(listener); + bool stopService = listenersHash[sensor].empty(); + if (stopService) + listenersHash.remove(sensor); + listenersLocker.unlock(); + if (stopService) { + AttachedJNIEnv aenv; + if (!aenv.jniEnv) + return false; + return aenv.jniEnv->CallStaticBooleanMethod(sensorsClass, unregisterSensorMethodId, jint(sensor)); + } + return true; + } +} + +static const char logTag[] = "Qt"; +static const char classErrorMsg[] = "Can't find class \"%s\""; +static const char methodErrorMsg[] = "Can't find method \"%s%s\""; + +static void accuracyChanged(JNIEnv * /*env*/, jobject /*thiz*/, jint sensor, jint accuracy) +{ + listenersLocker.lockForRead(); + foreach (AndroidSensors::AndroidSensorsListenerInterface *listener, listenersHash[sensor]) + listener->onAccuracyChanged(accuracy); + listenersLocker.unlock(); +} + +static void sensorChanged(JNIEnv *env, jobject /*thiz*/, jint sensor, jlong timeStamp, jfloatArray array) +{ + uint size = env->GetArrayLength(array); + jfloat *values = env->GetFloatArrayElements(array, 0); + listenersLocker.lockForRead(); + foreach (AndroidSensors::AndroidSensorsListenerInterface *listener, listenersHash[sensor]) + listener->onSensorChanged(timeStamp, values, size); + listenersLocker.unlock(); + env->ReleaseFloatArrayElements(array, values, JNI_ABORT); // don't copy back the elements + +} + +static JNINativeMethod methods[] = { + {"accuracyChanged", "(II)V", (void *)accuracyChanged}, + {"sensorChanged", "(IJ[F)V", (void *)sensorChanged} +}; + +#define FIND_AND_CHECK_CLASS(CLASS_NAME) \ +clazz = env->FindClass(CLASS_NAME); \ +if (!clazz) { \ + __android_log_print(ANDROID_LOG_FATAL, logTag, classErrorMsg, CLASS_NAME); \ + return JNI_FALSE; \ +} + +#define GET_AND_CHECK_STATIC_METHOD(VAR, CLASS, METHOD_NAME, METHOD_SIGNATURE) \ +VAR = env->GetStaticMethodID(CLASS, METHOD_NAME, METHOD_SIGNATURE); \ +if (!VAR) { \ + __android_log_print(ANDROID_LOG_FATAL, logTag, methodErrorMsg, METHOD_NAME, METHOD_SIGNATURE); \ + return JNI_FALSE; \ +} + +static bool registerNatives(JNIEnv *env) +{ + jclass clazz; + FIND_AND_CHECK_CLASS("org/qtproject/qt5/android/sensors/QtSensors"); + sensorsClass = static_cast<jclass>(env->NewGlobalRef(clazz)); + + if (env->RegisterNatives(sensorsClass, methods, sizeof(methods) / sizeof(methods[0])) < 0) { + __android_log_print(ANDROID_LOG_FATAL, logTag, "RegisterNatives failed"); + return JNI_FALSE; + } + + GET_AND_CHECK_STATIC_METHOD(getSensorListMethodId, sensorsClass, "getSensorList", "()[I"); + GET_AND_CHECK_STATIC_METHOD(registerSensorMethodId, sensorsClass, "registerSensor", "(II)Z"); + GET_AND_CHECK_STATIC_METHOD(unregisterSensorMethodId, sensorsClass, "unregisterSensor", "(I)Z"); + GET_AND_CHECK_STATIC_METHOD(getSensorDescriptionMethodId, sensorsClass, "getSensorDescription", "(I)Ljava/lang/String;"); + + return true; +} + +Q_DECL_EXPORT jint JNICALL JNI_OnLoad(JavaVM *vm, void * /*reserved*/) +{ + typedef union { + JNIEnv *nativeEnvironment; + void *venv; + } UnionJNIEnvToVoid; + + __android_log_print(ANDROID_LOG_INFO, logTag, "Sensors start"); + UnionJNIEnvToVoid uenv; + uenv.venv = NULL; + javaVM = 0; + + if (vm->GetEnv(&uenv.venv, JNI_VERSION_1_4) != JNI_OK) { + __android_log_print(ANDROID_LOG_FATAL, logTag, "GetEnv failed"); + return -1; + } + JNIEnv *env = uenv.nativeEnvironment; + if (!registerNatives(env)) { + __android_log_print(ANDROID_LOG_FATAL, logTag, "registerNatives failed"); + return -1; + } + + javaVM = vm; + return JNI_VERSION_1_4; +} |