| /* |
| * 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; |
| } |
| |