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