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/*
* 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 "jni/jni_native_buffer.h"
#include "jni/jni_util.h"
char* GetJBufferData(JNIEnv* env, jobject buffer, int* size) {
jclass base_class = env->FindClass("android/filterfw/core/NativeBuffer");
// Get fields
jfieldID ptr_field = env->GetFieldID(base_class, "mDataPointer", "J");
jfieldID size_field = env->GetFieldID(base_class, "mSize", "I");
// Get their values
char* data = reinterpret_cast<char*>(env->GetLongField(buffer, ptr_field));
if (size) {
*size = env->GetIntField(buffer, size_field);
}
// Clean-up
env->DeleteLocalRef(base_class);
return data;
}
bool AttachDataToJBuffer(JNIEnv* env, jobject buffer, char* data, int size) {
jclass base_class = env->FindClass("android/filterfw/core/NativeBuffer");
// Get fields
jfieldID ptr_field = env->GetFieldID(base_class, "mDataPointer", "J");
jfieldID size_field = env->GetFieldID(base_class, "mSize", "I");
// Set their values
env->SetLongField(buffer, ptr_field, reinterpret_cast<jlong>(data));
env->SetIntField(buffer, size_field, size);
return true;
}
jboolean Java_android_filterfw_core_NativeBuffer_allocate(JNIEnv* env, jobject thiz, jint size) {
char* data = new char[size];
return ToJBool(AttachDataToJBuffer(env, thiz, data, size));
}
jboolean Java_android_filterfw_core_NativeBuffer_deallocate(JNIEnv* env,
jobject thiz,
jboolean owns_data) {
if (ToCppBool(owns_data)) {
char* data = GetJBufferData(env, thiz, NULL);
delete[] data;
}
return JNI_TRUE;
}
jboolean Java_android_filterfw_core_NativeBuffer_nativeCopyTo(JNIEnv* env,
jobject thiz,
jobject new_buffer) {
// Get source buffer
int size;
char* source_data = GetJBufferData(env, thiz, &size);
// Make copy
char* target_data = new char[size];
memcpy(target_data, source_data, size);
// Attach it to new buffer
AttachDataToJBuffer(env, new_buffer, target_data, size);
return JNI_TRUE;
}
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