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 23 namespace android { 24 25 class SampleTable; 26 27 struct SampleIterator { 28 explicit SampleIterator(SampleTable *table); 29 30 status_t seekTo(uint32_t sampleIndex); 31 getChunkIndexSampleIterator32 uint32_t getChunkIndex() const { return mCurrentChunkIndex; } getDescIndexSampleIterator33 uint32_t getDescIndex() const { return mChunkDesc; } getSampleOffsetSampleIterator34 off64_t getSampleOffset() const { return mCurrentSampleOffset; } getSampleSizeSampleIterator35 size_t getSampleSize() const { return mCurrentSampleSize; } getSampleTimeSampleIterator36 uint64_t getSampleTime() const { return mCurrentSampleTime; } getSampleDurationSampleIterator37 uint64_t getSampleDuration() const { return mCurrentSampleDuration; } 38 getLastSampleIndexInChunkSampleIterator39 uint32_t getLastSampleIndexInChunk() const { 40 return mCurrentSampleIndex + mSamplesPerChunk - 41 ((mCurrentSampleIndex - mFirstChunkSampleIndex) % mSamplesPerChunk) - 1; 42 } 43 44 status_t getSampleSizeDirect( 45 uint32_t sampleIndex, size_t *size); 46 47 private: 48 SampleTable *mTable; 49 50 bool mInitialized; 51 52 uint32_t mSampleToChunkIndex; 53 uint32_t mFirstChunk; 54 uint32_t mFirstChunkSampleIndex; 55 uint32_t mStopChunk; 56 uint32_t mStopChunkSampleIndex; 57 uint32_t mSamplesPerChunk; 58 uint32_t mChunkDesc; 59 60 uint32_t mCurrentChunkIndex; 61 off64_t mCurrentChunkOffset; 62 Vector<size_t> mCurrentChunkSampleSizes; 63 64 uint32_t mTimeToSampleIndex; 65 uint32_t mTTSSampleIndex; 66 uint64_t mTTSSampleTime; 67 uint32_t mTTSCount; 68 uint64_t mTTSDuration; 69 70 uint32_t mCurrentSampleIndex; 71 off64_t mCurrentSampleOffset; 72 size_t mCurrentSampleSize; 73 uint64_t mCurrentSampleTime; 74 uint64_t mCurrentSampleDuration; 75 76 void reset(); 77 status_t findChunkRange(uint32_t sampleIndex); 78 status_t getChunkOffset(uint32_t chunk, off64_t *offset); 79 status_t findSampleTimeAndDuration(uint32_t sampleIndex, uint64_t *time, uint64_t *duration); 80 81 SampleIterator(const SampleIterator &); 82 SampleIterator &operator=(const SampleIterator &); 83 }; 84 85 } // namespace android 86 87 #endif // SAMPLE_ITERATOR_H_ 88