SampleTable.h revision abd1f4f870925d6776dbe4b930b759a1ab6595ca 
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, off_t data_offset, size_t data_size);
40
41    status_t setSampleToChunkParams(off_t data_offset, size_t data_size);
42
43    // type can be 'stsz' or 'stz2'.
44    status_t setSampleSizeParams(
45            uint32_t type, off_t data_offset, size_t data_size);
46
47    status_t setTimeToSampleParams(off_t data_offset, size_t data_size);
48
49    status_t setSyncSampleParams(off_t data_offset, size_t data_size);
50
51    ////////////////////////////////////////////////////////////////////////////
52
53    uint32_t countChunkOffsets() const;
54
55    uint32_t countSamples() const;
56
57    status_t getMaxSampleSize(size_t *size);
58
59    status_t getMetaDataForSample(
60            uint32_t sampleIndex,
61            off_t *offset,
62            size_t *size,
63            uint32_t *decodingTime);
64
65    enum {
66        kFlagBefore,
67        kFlagAfter,
68        kFlagClosest
69    };
70    status_t findSampleAtTime(
71            uint32_t req_time, uint32_t *sample_index, uint32_t flags);
72
73    status_t findSyncSampleNear(
74            uint32_t start_sample_index, uint32_t *sample_index,
75            uint32_t flags);
76
77    status_t findThumbnailSample(uint32_t *sample_index);
78
79protected:
80    ~SampleTable();
81
82private:
83    static const uint32_t kChunkOffsetType32;
84    static const uint32_t kChunkOffsetType64;
85    static const uint32_t kSampleSizeType32;
86    static const uint32_t kSampleSizeTypeCompact;
87
88    sp<DataSource> mDataSource;
89    Mutex mLock;
90
91    off_t mChunkOffsetOffset;
92    uint32_t mChunkOffsetType;
93    uint32_t mNumChunkOffsets;
94
95    off_t mSampleToChunkOffset;
96    uint32_t mNumSampleToChunkOffsets;
97
98    off_t mSampleSizeOffset;
99    uint32_t mSampleSizeFieldSize;
100    uint32_t mDefaultSampleSize;
101    uint32_t mNumSampleSizes;
102
103    uint32_t mTimeToSampleCount;
104    uint32_t *mTimeToSample;
105
106    off_t mSyncSampleOffset;
107    uint32_t mNumSyncSamples;
108
109    SampleIterator *mSampleIterator;
110
111    struct SampleToChunkEntry {
112        uint32_t startChunk;
113        uint32_t samplesPerChunk;
114        uint32_t chunkDesc;
115    };
116    SampleToChunkEntry *mSampleToChunkEntries;
117
118    friend struct SampleIterator;
119
120    status_t getSampleSize_l(uint32_t sample_index, size_t *sample_size);
121
122    SampleTable(const SampleTable &);
123    SampleTable &operator=(const SampleTable &);
124};
125
126}  // namespace android
127
128#endif  // SAMPLE_TABLE_H_
129