ESQueue.h revision bc7aae4ff7e72e5bf0fa888f946835840a4357bb 
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#include <vector>
26
27namespace android {
28
29struct ABuffer;
30class MetaData;
31
32struct ElementaryStreamQueue {
33    enum Mode {
34        INVALID = 0,
35        H264,
36        AAC,
37        AC3,
38        MPEG_AUDIO,
39        MPEG_VIDEO,
40        MPEG4_VIDEO,
41        PCM_AUDIO,
42        METADATA,
43    };
44
45    enum Flags {
46        // Data appended to the queue is always at access unit boundaries.
47        kFlag_AlignedData = 1,
48        kFlag_ScrambledData = 2,
49    };
50    explicit ElementaryStreamQueue(Mode mode, uint32_t flags = 0);
51
52    status_t appendData(const void *data, size_t size,
53            int64_t timeUs, int32_t payloadOffset = 0,
54            uint32_t pesScramblingControl = 0);
55
56    void appendScrambledData(
57            const void *data, size_t size,
58            int32_t keyId, bool isSync,
59            sp<ABuffer> clearSizes, sp<ABuffer> encSizes);
60
61    void signalEOS();
62    void clear(bool clearFormat);
63
64    sp<ABuffer> dequeueAccessUnit();
65
66    sp<MetaData> getFormat();
67
68    bool isScrambled() const;
69
70    void setCasInfo(int32_t systemId, const std::vector<uint8_t> &sessionId);
71
72private:
73    struct RangeInfo {
74        int64_t mTimestampUs;
75        size_t mLength;
76        int32_t mPesOffset;
77        uint32_t mPesScramblingControl;
78    };
79
80    struct ScrambledRangeInfo {
81        //int64_t mTimestampUs;
82        size_t mLength;
83        int32_t mKeyId;
84        int32_t mIsSync;
85        sp<ABuffer> mClearSizes;
86        sp<ABuffer> mEncSizes;
87    };
88
89    Mode mMode;
90    uint32_t mFlags;
91    bool mEOSReached;
92
93    sp<ABuffer> mBuffer;
94    List<RangeInfo> mRangeInfos;
95
96    sp<ABuffer> mScrambledBuffer;
97    List<ScrambledRangeInfo> mScrambledRangeInfos;
98    int32_t mCASystemId;
99    std::vector<uint8_t> mCasSessionId;
100
101    sp<MetaData> mFormat;
102
103    sp<ABuffer> dequeueAccessUnitH264();
104    sp<ABuffer> dequeueAccessUnitAAC();
105    sp<ABuffer> dequeueAccessUnitAC3();
106    sp<ABuffer> dequeueAccessUnitMPEGAudio();
107    sp<ABuffer> dequeueAccessUnitMPEGVideo();
108    sp<ABuffer> dequeueAccessUnitMPEG4Video();
109    sp<ABuffer> dequeueAccessUnitPCMAudio();
110    sp<ABuffer> dequeueAccessUnitMetadata();
111
112    // consume a logical (compressed) access unit of size "size",
113    // returns its timestamp in us (or -1 if no time information).
114    int64_t fetchTimestamp(size_t size,
115            int32_t *pesOffset = NULL,
116            int32_t *pesScramblingControl = NULL);
117
118    sp<ABuffer> dequeueScrambledAccessUnit();
119
120    DISALLOW_EVIL_CONSTRUCTORS(ElementaryStreamQueue);
121};
122
123}  // namespace android
124
125#endif  // ES_QUEUE_H_
126