SampleTable.h revision 4931bb5259d10c1fa01e7405fb7aaef58a8ffb22 
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    // type can be 'stco' or 'co64'.
38    status_t setChunkOffsetParams(
39            uint32_t type, off64_t data_offset, size_t data_size);
40
41    status_t setSampleToChunkParams(off64_t data_offset, size_t data_size);
42
43    // type can be 'stsz' or 'stz2'.
44    status_t setSampleSizeParams(
45            uint32_t type, off64_t data_offset, size_t data_size);
46
47    status_t setTimeToSampleParams(off64_t data_offset, size_t data_size);
48
49    status_t setCompositionTimeToSampleParams(
50            off64_t data_offset, size_t data_size);
51
52    status_t setSyncSampleParams(off64_t data_offset, size_t data_size);
53
54    ////////////////////////////////////////////////////////////////////////////
55
56    uint32_t countChunkOffsets() const;
57
58    uint32_t countSamples() const;
59
60    status_t getMaxSampleSize(size_t *size);
61
62    status_t getMetaDataForSample(
63            uint32_t sampleIndex,
64            off64_t *offset,
65            size_t *size,
66            uint32_t *decodingTime,
67            bool *isSyncSample = NULL);
68
69    enum {
70        kFlagBefore,
71        kFlagAfter,
72        kFlagClosest
73    };
74    status_t findSampleAtTime(
75            uint32_t req_time, uint32_t *sample_index, uint32_t flags);
76
77    status_t findSyncSampleNear(
78            uint32_t start_sample_index, uint32_t *sample_index,
79            uint32_t flags);
80
81    status_t findThumbnailSample(uint32_t *sample_index);
82
83protected:
84    ~SampleTable();
85
86private:
87    static const uint32_t kChunkOffsetType32;
88    static const uint32_t kChunkOffsetType64;
89    static const uint32_t kSampleSizeType32;
90    static const uint32_t kSampleSizeTypeCompact;
91
92    sp<DataSource> mDataSource;
93    Mutex mLock;
94
95    off64_t mChunkOffsetOffset;
96    uint32_t mChunkOffsetType;
97    uint32_t mNumChunkOffsets;
98
99    off64_t mSampleToChunkOffset;
100    uint32_t mNumSampleToChunkOffsets;
101
102    off64_t mSampleSizeOffset;
103    uint32_t mSampleSizeFieldSize;
104    uint32_t mDefaultSampleSize;
105    uint32_t mNumSampleSizes;
106
107    uint32_t mTimeToSampleCount;
108    uint32_t *mTimeToSample;
109
110    uint32_t *mCompositionTimeDeltaEntries;
111    size_t mNumCompositionTimeDeltaEntries;
112
113    off64_t mSyncSampleOffset;
114    uint32_t mNumSyncSamples;
115    uint32_t *mSyncSamples;
116    size_t mLastSyncSampleIndex;
117
118    SampleIterator *mSampleIterator;
119
120    struct SampleToChunkEntry {
121        uint32_t startChunk;
122        uint32_t samplesPerChunk;
123        uint32_t chunkDesc;
124    };
125    SampleToChunkEntry *mSampleToChunkEntries;
126
127    friend struct SampleIterator;
128
129    status_t getSampleSize_l(uint32_t sample_index, size_t *sample_size);
130
131    uint32_t getCompositionTimeOffset(uint32_t sampleIndex) const;
132
133    SampleTable(const SampleTable &);
134    SampleTable &operator=(const SampleTable &);
135};
136
137}  // namespace android
138
139#endif  // SAMPLE_TABLE_H_
140