SampleTable.h revision 169c286ed166499c5099d2b336967e0bf3d25551 
1/*
2 * Copyright (C) 2009 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 SAMPLE_TABLE_H_
18
19#define SAMPLE_TABLE_H_
20
21#include <sys/types.h>
22#include <stdint.h>
23
24#include <media/stagefright/MediaErrors.h>
25#include <utils/RefBase.h>
26#include <utils/threads.h>
27
28namespace android {
29
30class DataSource;
31struct SampleIterator;
32
33class SampleTable : public RefBase {
34public:
35    SampleTable(const sp<DataSource> &source);
36
37    bool isValid() const;
38
39    // type can be 'stco' or 'co64'.
40    status_t setChunkOffsetParams(
41            uint32_t type, off64_t data_offset, size_t data_size);
42
43    status_t setSampleToChunkParams(off64_t data_offset, size_t data_size);
44
45    // type can be 'stsz' or 'stz2'.
46    status_t setSampleSizeParams(
47            uint32_t type, off64_t data_offset, size_t data_size);
48
49    status_t setTimeToSampleParams(off64_t data_offset, size_t data_size);
50
51    status_t setCompositionTimeToSampleParams(
52            off64_t data_offset, size_t data_size);
53
54    status_t setSyncSampleParams(off64_t data_offset, size_t data_size);
55
56    ////////////////////////////////////////////////////////////////////////////
57
58    uint32_t countChunkOffsets() const;
59
60    uint32_t countSamples() const;
61
62    status_t getMaxSampleSize(size_t *size);
63
64    status_t getMetaDataForSample(
65            uint32_t sampleIndex,
66            off64_t *offset,
67            size_t *size,
68            uint32_t *compositionTime,
69            bool *isSyncSample = NULL);
70
71    enum {
72        kFlagBefore,
73        kFlagAfter,
74        kFlagClosest
75    };
76    status_t findSampleAtTime(
77            uint32_t req_time, uint32_t *sample_index, uint32_t flags);
78
79    status_t findSyncSampleNear(
80            uint32_t start_sample_index, uint32_t *sample_index,
81            uint32_t flags);
82
83    status_t findThumbnailSample(uint32_t *sample_index);
84
85protected:
86    ~SampleTable();
87
88private:
89    static const uint32_t kChunkOffsetType32;
90    static const uint32_t kChunkOffsetType64;
91    static const uint32_t kSampleSizeType32;
92    static const uint32_t kSampleSizeTypeCompact;
93
94    sp<DataSource> mDataSource;
95    Mutex mLock;
96
97    off64_t mChunkOffsetOffset;
98    uint32_t mChunkOffsetType;
99    uint32_t mNumChunkOffsets;
100
101    off64_t mSampleToChunkOffset;
102    uint32_t mNumSampleToChunkOffsets;
103
104    off64_t mSampleSizeOffset;
105    uint32_t mSampleSizeFieldSize;
106    uint32_t mDefaultSampleSize;
107    uint32_t mNumSampleSizes;
108
109    uint32_t mTimeToSampleCount;
110    uint32_t *mTimeToSample;
111
112    struct SampleTimeEntry {
113        uint32_t mSampleIndex;
114        uint32_t mCompositionTime;
115    };
116    SampleTimeEntry *mSampleTimeEntries;
117
118    uint32_t *mCompositionTimeDeltaEntries;
119    size_t mNumCompositionTimeDeltaEntries;
120
121    off64_t mSyncSampleOffset;
122    uint32_t mNumSyncSamples;
123    uint32_t *mSyncSamples;
124    size_t mLastSyncSampleIndex;
125
126    SampleIterator *mSampleIterator;
127
128    struct SampleToChunkEntry {
129        uint32_t startChunk;
130        uint32_t samplesPerChunk;
131        uint32_t chunkDesc;
132    };
133    SampleToChunkEntry *mSampleToChunkEntries;
134
135    friend struct SampleIterator;
136
137    status_t getSampleSize_l(uint32_t sample_index, size_t *sample_size);
138
139    uint32_t getCompositionTimeOffset(uint32_t sampleIndex) const;
140
141    static int CompareIncreasingTime(const void *, const void *);
142
143    void buildSampleEntriesTable();
144
145    SampleTable(const SampleTable &);
146    SampleTable &operator=(const SampleTable &);
147};
148
149}  // namespace android
150
151#endif  // SAMPLE_TABLE_H_
152