SampleTable.h revision 170056540e9ce65261b45efd15f67e72e2df1bed 
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            uint32_t *sampleDuration = NULL);
71
72    enum {
73        kFlagBefore,
74        kFlagAfter,
75        kFlagClosest
76    };
77    status_t findSampleAtTime(
78            uint32_t req_time, uint32_t *sample_index, uint32_t flags);
79
80    status_t findSyncSampleNear(
81            uint32_t start_sample_index, uint32_t *sample_index,
82            uint32_t flags);
83
84    status_t findThumbnailSample(uint32_t *sample_index);
85
86protected:
87    ~SampleTable();
88
89private:
90    struct CompositionDeltaLookup;
91
92    static const uint32_t kChunkOffsetType32;
93    static const uint32_t kChunkOffsetType64;
94    static const uint32_t kSampleSizeType32;
95    static const uint32_t kSampleSizeTypeCompact;
96
97    sp<DataSource> mDataSource;
98    Mutex mLock;
99
100    off64_t mChunkOffsetOffset;
101    uint32_t mChunkOffsetType;
102    uint32_t mNumChunkOffsets;
103
104    off64_t mSampleToChunkOffset;
105    uint32_t mNumSampleToChunkOffsets;
106
107    off64_t mSampleSizeOffset;
108    uint32_t mSampleSizeFieldSize;
109    uint32_t mDefaultSampleSize;
110    uint32_t mNumSampleSizes;
111
112    uint32_t mTimeToSampleCount;
113    uint32_t *mTimeToSample;
114
115    struct SampleTimeEntry {
116        uint32_t mSampleIndex;
117        uint32_t mCompositionTime;
118    };
119    SampleTimeEntry *mSampleTimeEntries;
120
121    uint32_t *mCompositionTimeDeltaEntries;
122    size_t mNumCompositionTimeDeltaEntries;
123    CompositionDeltaLookup *mCompositionDeltaLookup;
124
125    off64_t mSyncSampleOffset;
126    uint32_t mNumSyncSamples;
127    uint32_t *mSyncSamples;
128    size_t mLastSyncSampleIndex;
129
130    SampleIterator *mSampleIterator;
131
132    struct SampleToChunkEntry {
133        uint32_t startChunk;
134        uint32_t samplesPerChunk;
135        uint32_t chunkDesc;
136    };
137    SampleToChunkEntry *mSampleToChunkEntries;
138
139    friend struct SampleIterator;
140
141    status_t getSampleSize_l(uint32_t sample_index, size_t *sample_size);
142    uint32_t getCompositionTimeOffset(uint32_t sampleIndex);
143
144    static int CompareIncreasingTime(const void *, const void *);
145
146    void buildSampleEntriesTable();
147
148    SampleTable(const SampleTable &);
149    SampleTable &operator=(const SampleTable &);
150};
151
152}  // namespace android
153
154#endif  // SAMPLE_TABLE_H_
155