ESQueue.h revision 40d8899f60c5212af9d727ba0ffaaecf676ebd1d 
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 ES_QUEUE_H_
18
19#define ES_QUEUE_H_
20
21#include <media/stagefright/foundation/ABase.h>
22#include <utils/Errors.h>
23#include <utils/List.h>
24#include <utils/RefBase.h>
25
26namespace android {
27
28struct ABuffer;
29class MetaData;
30
31struct ElementaryStreamQueue {
32    enum Mode {
33        H264,
34        AAC,
35        AC3,
36        MPEG_AUDIO,
37        MPEG_VIDEO,
38        MPEG4_VIDEO,
39        PCM_AUDIO,
40        METADATA,
41    };
42
43    enum Flags {
44        // Data appended to the queue is always at access unit boundaries.
45        kFlag_AlignedData = 1,
46    };
47    explicit ElementaryStreamQueue(Mode mode, uint32_t flags = 0);
48
49    status_t appendData(const void *data, size_t size, int64_t timeUs);
50    void signalEOS();
51    void clear(bool clearFormat);
52
53    sp<ABuffer> dequeueAccessUnit();
54
55    sp<MetaData> getFormat();
56
57private:
58    struct RangeInfo {
59        int64_t mTimestampUs;
60        size_t mLength;
61    };
62
63    Mode mMode;
64    uint32_t mFlags;
65    bool mEOSReached;
66
67    sp<ABuffer> mBuffer;
68    List<RangeInfo> mRangeInfos;
69
70    sp<MetaData> mFormat;
71
72    sp<ABuffer> dequeueAccessUnitH264();
73    sp<ABuffer> dequeueAccessUnitAAC();
74    sp<ABuffer> dequeueAccessUnitAC3();
75    sp<ABuffer> dequeueAccessUnitMPEGAudio();
76    sp<ABuffer> dequeueAccessUnitMPEGVideo();
77    sp<ABuffer> dequeueAccessUnitMPEG4Video();
78    sp<ABuffer> dequeueAccessUnitPCMAudio();
79    sp<ABuffer> dequeueAccessUnitMetadata();
80
81    // consume a logical (compressed) access unit of size "size",
82    // returns its timestamp in us (or -1 if no time information).
83    int64_t fetchTimestamp(size_t size);
84
85    DISALLOW_EVIL_CONSTRUCTORS(ElementaryStreamQueue);
86};
87
88}  // namespace android
89
90#endif  // ES_QUEUE_H_
91