diff options
Diffstat (limited to 'media/mca/filterfw/jni/jni_util.cpp')
| -rw-r--r-- | media/mca/filterfw/jni/jni_util.cpp | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/media/mca/filterfw/jni/jni_util.cpp b/media/mca/filterfw/jni/jni_util.cpp new file mode 100644 index 0000000..30c0898 --- /dev/null +++ b/media/mca/filterfw/jni/jni_util.cpp @@ -0,0 +1,188 @@ +/* + * Copyright (C) 2011 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. + */ + +#include <string> + +#include "jni/jni_util.h" + +#include "base/logging.h" + +#if 0 +JavaObject::JavaObject() + : object_(JNI_NULL), + ref_count_(new int(0)) { +} + +JavaObject::JavaObject(const JavaObject& java_obj) + : object_(java_obj.object_), + ref_count_(java_obj.ref_count_) { + Retain(); +} + +JavaObject::JavaObject(jobject object, JNIEnv* env) + : object_(NULL), + ref_count_(new int(0)) { + Retain(); + object_ = env->NewGlobalRef(object_); +} + +JavaObject::~JavaObject() { + Release(); +} + +JavaObject& JavaObject::operator=(const JavaObject& java_obj) { + Release(); + object_ = java_obj.object_; + ref_count_ = java_obj.ref_count_; + Retain(); + return *this; +} + +void JavaObject::Retain() { + if (ref_count_) + ++(*ref_count_); + else + ALOGE("JavaObject: Reference count is NULL! JavaObject may be corrupted."); +} + +void JavaObject::Release() { + if (ref_count_) { + if (*ref_count_ > 0) + --(*ref_count_); + if (*ref_count_ == 0) { + JNIEnv* env = GetCurrentJNIEnv(); + if (!env) + ALOGE("JavaObject: Releasing outside of Java thread. Will just leak!"); + else if (object_) + env->DeleteGlobalRef(object_); + delete ref_count_; + ref_count_ = NULL; + } + } else { + ALOGE("JavaObject: Reference count is NULL! JavaObject may be corrupted."); + } +} + +void JavaObject::Reset() { + Release(); + object_ = NULL; + ref_count_ = new int(0); +} + +JavaVM* GetCurrentJavaVM() { + return g_current_java_vm_; +} + +JNIEnv* GetCurrentJNIEnv() { + JavaVM* vm = GetCurrentJavaVM(); + JNIEnv* env = NULL; + const jint result = vm->GetEnv(reinterpret_cast<void**>(&env), + JNI_VERSION_1_4); + return result == JNI_OK ? env : NULL; +} +#endif + +jstring ToJString(JNIEnv* env, const std::string& value) { + return env->NewStringUTF(value.c_str()); +} + +std::string ToCppString(JNIEnv* env, jstring value) { + jboolean isCopy; + const char* c_value = env->GetStringUTFChars(value, &isCopy); + std::string result(c_value); + if (isCopy == JNI_TRUE) + env->ReleaseStringUTFChars(value, c_value); + return result; +} + +jboolean ToJBool(bool value) { + return value ? JNI_TRUE : JNI_FALSE; +} + +bool ToCppBool(jboolean value) { + return value == JNI_TRUE; +} + +// TODO: We actually shouldn't use such a function as it requires a class name lookup at every +// invocation. Instead, store the class objects and use those. +bool IsJavaInstanceOf(JNIEnv* env, jobject object, const std::string& class_name) { + jclass clazz = env->FindClass(class_name.c_str()); + return clazz ? env->IsInstanceOf(object, clazz) == JNI_TRUE : false; +} + +template<typename T> +jobject CreateJObject(JNIEnv* env, const std::string& class_name, const std::string& signature, T value) { + jobject result = JNI_NULL; + + return result; +} + +Value ToCValue(JNIEnv* env, jobject object) { + Value result = MakeNullValue(); + if (object != NULL) { + if (IsJavaInstanceOf(env, object, "java/lang/Boolean")) { + jmethodID method = env->GetMethodID(env->GetObjectClass(object), "booleanValue", "()Z"); + result = MakeIntValue(env->CallBooleanMethod(object, method) == JNI_TRUE ? 1 : 0); + } else if (IsJavaInstanceOf(env, object, "java/lang/Integer")) { + jmethodID method = env->GetMethodID(env->GetObjectClass(object), "intValue", "()I"); + result = MakeIntValue(env->CallIntMethod(object, method)); + } else if (IsJavaInstanceOf(env, object, "java/lang/Float")) { + jmethodID method = env->GetMethodID(env->GetObjectClass(object), "floatValue", "()F"); + result = MakeFloatValue(env->CallFloatMethod(object, method)); + } else if (IsJavaInstanceOf(env, object, "java/lang/String")) { + result = MakeStringValue(ToCppString(env, static_cast<jstring>(object)).c_str()); + } else if (IsJavaInstanceOf(env, object, "[I")) { + jint* elems = env->GetIntArrayElements(static_cast<jintArray>(object), NULL); + const jint count = env->GetArrayLength(static_cast<jintArray>(object)); + result = MakeIntArrayValue(elems, count); + env->ReleaseIntArrayElements(static_cast<jintArray>(object), elems, JNI_ABORT); + } else if (IsJavaInstanceOf(env, object, "[F")) { + jfloat* elems = env->GetFloatArrayElements(static_cast<jfloatArray>(object), NULL); + const jint count = env->GetArrayLength(static_cast<jfloatArray>(object)); + result = MakeFloatArrayValue(elems, count); + env->ReleaseFloatArrayElements(static_cast<jfloatArray>(object), elems, JNI_ABORT); + } + } + return result; +} + +jobject ToJObject(JNIEnv* env, const Value& value) { + jobject result = JNI_NULL; + if (ValueIsInt(value)) { + jclass clazz = env->FindClass("java/lang/Integer"); + jmethodID constructorID = env->GetMethodID(clazz, "<init>", "(I)V"); + result = env->NewObject(clazz, constructorID, GetIntValue(value)); + } else if (ValueIsFloat(value)) { + jclass clazz = env->FindClass("java/lang/Float"); + jmethodID constructorID = env->GetMethodID(clazz, "<init>", "(F)V"); + result = env->NewObject(clazz, constructorID, GetFloatValue(value)); + } else if (ValueIsString(value)) { + result = ToJString(env, GetStringValue(value)); + } else if (ValueIsIntArray(value)) { + result = env->NewIntArray(GetValueCount(value)); + env->SetIntArrayRegion(static_cast<jintArray>(result), + 0, + GetValueCount(value), + reinterpret_cast<const jint*>(GetIntArrayValue(value))); + } else if (ValueIsFloatArray(value)) { + result = env->NewFloatArray(GetValueCount(value)); + env->SetFloatArrayRegion(static_cast<jfloatArray>(result), + 0, + GetValueCount(value), + reinterpret_cast<const jfloat*>(GetFloatArrayValue(value))); + } + return result; +} |