1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef ANDROID_FILTEFW_JNI_NATIVE_BUFFER_H 18#define ANDROID_FILTEFW_JNI_NATIVE_BUFFER_H 19 20#include <jni.h> 21 22// Internal Buffer Unwrapping functions //////////////////////////////////////////////////////////// 23/** 24 * Given a Java NativeBuffer instance, get access to the underlying C pointer and its size. The 25 * size argument may be NULL, in which case the object is not queried for its size. 26 **/ 27char* GetJBufferData(JNIEnv* env, jobject buffer, int* size); 28 29/** 30 * Attach a given C data buffer and its size to a given allocated Java NativeBuffer instance. After 31 * this call, the java instance will have the given C buffer as its backing. Note, that the Java 32 * instance contains the flag on whether or not it owns the buffer or not, so make sure it is what 33 * you expect. 34 **/ 35bool AttachDataToJBuffer(JNIEnv* env, jobject buffer, char* data, int size); 36 37#ifdef __cplusplus 38extern "C" { 39#endif 40 41// JNI Wrappers //////////////////////////////////////////////////////////////////////////////////// 42JNIEXPORT jboolean JNICALL 43Java_android_filterfw_core_NativeBuffer_allocate(JNIEnv* env, jobject thiz, jint size); 44 45JNIEXPORT jboolean JNICALL 46Java_android_filterfw_core_NativeBuffer_deallocate(JNIEnv* env, jobject thiz, jboolean owns_data); 47 48JNIEXPORT jboolean JNICALL 49Java_android_filterfw_core_NativeBuffer_nativeCopyTo(JNIEnv* env, jobject thiz, jobject new_buffer); 50 51#ifdef __cplusplus 52} 53#endif 54 55#endif // ANDROID_FILTEFW_JNI_NATIVE_BUFFER_H 56