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#ifndef SAMPLE_ITERATOR_H_
18
19#define SAMPLE_ITERATOR_H_
20
21#include <utils/Vector.h>
22
23namespace android {
24
25class SampleTable;
26
27struct SampleIterator {
28    SampleIterator(SampleTable *table);
29
30    status_t seekTo(uint32_t sampleIndex);
31
32    uint32_t getChunkIndex() const { return mCurrentChunkIndex; }
33    uint32_t getDescIndex() const { return mChunkDesc; }
34    off64_t getSampleOffset() const { return mCurrentSampleOffset; }
35    size_t getSampleSize() const { return mCurrentSampleSize; }
36    uint32_t getSampleTime() const { return mCurrentSampleTime; }
37    uint32_t getSampleDuration() const { return mCurrentSampleDuration; }
38
39    status_t getSampleSizeDirect(
40            uint32_t sampleIndex, size_t *size);
41
42private:
43    SampleTable *mTable;
44
45    bool mInitialized;
46
47    uint32_t mSampleToChunkIndex;
48    uint32_t mFirstChunk;
49    uint32_t mFirstChunkSampleIndex;
50    uint32_t mStopChunk;
51    uint32_t mStopChunkSampleIndex;
52    uint32_t mSamplesPerChunk;
53    uint32_t mChunkDesc;
54
55    uint32_t mCurrentChunkIndex;
56    off64_t mCurrentChunkOffset;
57    Vector<size_t> mCurrentChunkSampleSizes;
58
59    uint32_t mTimeToSampleIndex;
60    uint32_t mTTSSampleIndex;
61    uint32_t mTTSSampleTime;
62    uint32_t mTTSCount;
63    uint32_t mTTSDuration;
64
65    uint32_t mCurrentSampleIndex;
66    off64_t mCurrentSampleOffset;
67    size_t mCurrentSampleSize;
68    uint32_t mCurrentSampleTime;
69    uint32_t mCurrentSampleDuration;
70
71    void reset();
72    status_t findChunkRange(uint32_t sampleIndex);
73    status_t getChunkOffset(uint32_t chunk, off64_t *offset);
74    status_t findSampleTimeAndDuration(uint32_t sampleIndex, uint32_t *time, uint32_t *duration);
75
76    SampleIterator(const SampleIterator &);
77    SampleIterator &operator=(const SampleIterator &);
78};
79
80}  // namespace android
81
82#endif  // SAMPLE_ITERATOR_H_
83