ABuffer.h revision 90b16fbdef406d95a6fb2f9395719dd7b7ca6adb 
1/*
2 * Copyright (C) 2010 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 A_BUFFER_H_
18
19#define A_BUFFER_H_
20
21#include <sys/types.h>
22#include <stdint.h>
23
24#include <media/stagefright/foundation/ABase.h>
25#include <utils/RefBase.h>
26
27namespace android {
28
29struct AMessage;
30
31struct ABuffer : public RefBase {
32    ABuffer(size_t capacity);
33    ABuffer(void *data, size_t capacity);
34
35    void setFarewellMessage(const sp<AMessage> msg);
36
37    uint8_t *base() { return (uint8_t *)mData; }
38    uint8_t *data() { return (uint8_t *)mData + mRangeOffset; }
39    size_t capacity() const { return mCapacity; }
40    size_t size() const { return mRangeLength; }
41    size_t offset() const { return mRangeOffset; }
42
43    void setRange(size_t offset, size_t size);
44
45    // create buffer from dup of some memory block
46    static sp<ABuffer> CreateAsCopy(const void *data, size_t capacity);
47
48    void setInt32Data(int32_t data) { mInt32Data = data; }
49    int32_t int32Data() const { return mInt32Data; }
50
51    sp<AMessage> meta();
52
53protected:
54    virtual ~ABuffer();
55
56private:
57    sp<AMessage> mFarewell;
58    sp<AMessage> mMeta;
59
60    void *mData;
61    size_t mCapacity;
62    size_t mRangeOffset;
63    size_t mRangeLength;
64
65    int32_t mInt32Data;
66
67    bool mOwnsData;
68
69    DISALLOW_EVIL_CONSTRUCTORS(ABuffer);
70};
71
72}  // namespace android
73
74#endif  // A_BUFFER_H_
75