SampleIterator.h revision 170056540e9ce65261b45efd15f67e72e2df1bed 
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#include <utils/Vector.h>
18
19namespace android {
20
21struct SampleTable;
22
23struct SampleIterator {
24    SampleIterator(SampleTable *table);
25
26    status_t seekTo(uint32_t sampleIndex);
27
28    uint32_t getChunkIndex() const { return mCurrentChunkIndex; }
29    uint32_t getDescIndex() const { return mChunkDesc; }
30    off64_t getSampleOffset() const { return mCurrentSampleOffset; }
31    size_t getSampleSize() const { return mCurrentSampleSize; }
32    uint32_t getSampleTime() const { return mCurrentSampleTime; }
33    uint32_t getSampleDuration() const { return mCurrentSampleDuration; }
34
35    status_t getSampleSizeDirect(
36            uint32_t sampleIndex, size_t *size);
37
38private:
39    SampleTable *mTable;
40
41    bool mInitialized;
42
43    uint32_t mSampleToChunkIndex;
44    uint32_t mFirstChunk;
45    uint32_t mFirstChunkSampleIndex;
46    uint32_t mStopChunk;
47    uint32_t mStopChunkSampleIndex;
48    uint32_t mSamplesPerChunk;
49    uint32_t mChunkDesc;
50
51    uint32_t mCurrentChunkIndex;
52    off64_t mCurrentChunkOffset;
53    Vector<size_t> mCurrentChunkSampleSizes;
54
55    uint32_t mTimeToSampleIndex;
56    uint32_t mTTSSampleIndex;
57    uint32_t mTTSSampleTime;
58    uint32_t mTTSCount;
59    uint32_t mTTSDuration;
60
61    uint32_t mCurrentSampleIndex;
62    off64_t mCurrentSampleOffset;
63    size_t mCurrentSampleSize;
64    uint32_t mCurrentSampleTime;
65    uint32_t mCurrentSampleDuration;
66
67    void reset();
68    status_t findChunkRange(uint32_t sampleIndex);
69    status_t getChunkOffset(uint32_t chunk, off64_t *offset);
70    status_t findSampleTimeAndDuration(uint32_t sampleIndex, uint32_t *time, uint32_t *duration);
71
72    SampleIterator(const SampleIterator &);
73    SampleIterator &operator=(const SampleIterator &);
74};
75
76}  // namespace android
77
78