ABuffer.h revision 96e92b58b7e9647b4c7c2f54b62a1b357ab06b66 
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;
30class MediaBufferBase;
31
32struct ABuffer : public RefBase {
33    ABuffer(size_t capacity);
34    ABuffer(void *data, size_t capacity);
35
36    void setFarewellMessage(const sp<AMessage> msg);
37
38    uint8_t *base() { return (uint8_t *)mData; }
39    uint8_t *data() { return (uint8_t *)mData + mRangeOffset; }
40    size_t capacity() const { return mCapacity; }
41    size_t size() const { return mRangeLength; }
42    size_t offset() const { return mRangeOffset; }
43
44    void setRange(size_t offset, size_t size);
45
46    // create buffer from dup of some memory block
47    static sp<ABuffer> CreateAsCopy(const void *data, size_t capacity);
48
49    void setInt32Data(int32_t data) { mInt32Data = data; }
50    int32_t int32Data() const { return mInt32Data; }
51
52    sp<AMessage> meta();
53
54    MediaBufferBase *getMediaBufferBase();
55    void setMediaBufferBase(MediaBufferBase *mediaBuffer);
56
57protected:
58    virtual ~ABuffer();
59
60private:
61    sp<AMessage> mFarewell;
62    sp<AMessage> mMeta;
63
64    MediaBufferBase *mMediaBufferBase;
65
66    void *mData;
67    size_t mCapacity;
68    size_t mRangeOffset;
69    size_t mRangeLength;
70
71    int32_t mInt32Data;
72
73    bool mOwnsData;
74
75    DISALLOW_EVIL_CONSTRUCTORS(ABuffer);
76};
77
78}  // namespace android
79
80#endif  // A_BUFFER_H_
81