1/*
2 * Copyright 2016, 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 SECURE_BUFFER_H_
18
19#define SECURE_BUFFER_H_
20
21#include <media/ICrypto.h>
22#include <media/MediaCodecBuffer.h>
23
24namespace android {
25
26class NativeHandle;
27
28/**
29 * Secure MediaCodecBuffer implementation.
30 *
31 * For classes outside of MediaCodec, this buffer is an opaque buffer only with
32 * the size information. For decryption, it exposes underlying handle/pointer
33 * and its type, which can be fed to ICrypto::decrypt().
34 */
35class SecureBuffer : public MediaCodecBuffer {
36public:
37    SecureBuffer(const sp<AMessage> &format, const void *ptr, size_t size);
38    SecureBuffer(const sp<AMessage> &format, const sp<NativeHandle> &handle, size_t size);
39
40    virtual ~SecureBuffer() = default;
41
42    void *getDestinationPointer();
43    ICrypto::DestinationType getDestinationType();
44
45private:
46    SecureBuffer() = delete;
47
48    const void *mPointer;
49    const sp<NativeHandle> mHandle;
50};
51
52}  // namespace android
53
54#endif  // SECURE_BUFFER_H_
55