Home | History | Annotate | Download | only in include 
      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 
     28 namespace android {
     29 
     30 class DataSource;
     31 struct SampleIterator;
     32 
     33 class SampleTable : public RefBase {
     34 public:
     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 
     71     enum {
     72         kFlagBefore,
     73         kFlagAfter,
     74         kFlagClosest
     75     };
     76     status_t findSampleAtTime(
     77             uint32_t req_time, uint32_t *sample_index, uint32_t flags);
     78 
     79     status_t findSyncSampleNear(
     80             uint32_t start_sample_index, uint32_t *sample_index,
     81             uint32_t flags);
     82 
     83     status_t findThumbnailSample(uint32_t *sample_index);
     84 
     85 protected:
     86     ~SampleTable();
     87 
     88 private:
     89     struct CompositionDeltaLookup;
     90 
     91     static const uint32_t kChunkOffsetType32;
     92     static const uint32_t kChunkOffsetType64;
     93     static const uint32_t kSampleSizeType32;
     94     static const uint32_t kSampleSizeTypeCompact;
     95 
     96     sp<DataSource> mDataSource;
     97     Mutex mLock;
     98 
     99     off64_t mChunkOffsetOffset;
    100     uint32_t mChunkOffsetType;
    101     uint32_t mNumChunkOffsets;
    102 
    103     off64_t mSampleToChunkOffset;
    104     uint32_t mNumSampleToChunkOffsets;
    105 
    106     off64_t mSampleSizeOffset;
    107     uint32_t mSampleSizeFieldSize;
    108     uint32_t mDefaultSampleSize;
    109     uint32_t mNumSampleSizes;
    110 
    111     uint32_t mTimeToSampleCount;
    112     uint32_t *mTimeToSample;
    113 
    114     struct SampleTimeEntry {
    115         uint32_t mSampleIndex;
    116         uint32_t mCompositionTime;
    117     };
    118     SampleTimeEntry *mSampleTimeEntries;
    119 
    120     uint32_t *mCompositionTimeDeltaEntries;
    121     size_t mNumCompositionTimeDeltaEntries;
    122     CompositionDeltaLookup *mCompositionDeltaLookup;
    123 
    124     off64_t mSyncSampleOffset;
    125     uint32_t mNumSyncSamples;
    126     uint32_t *mSyncSamples;
    127     size_t mLastSyncSampleIndex;
    128 
    129     SampleIterator *mSampleIterator;
    130 
    131     struct SampleToChunkEntry {
    132         uint32_t startChunk;
    133         uint32_t samplesPerChunk;
    134         uint32_t chunkDesc;
    135     };
    136     SampleToChunkEntry *mSampleToChunkEntries;
    137 
    138     friend struct SampleIterator;
    139 
    140     status_t getSampleSize_l(uint32_t sample_index, size_t *sample_size);
    141     uint32_t getCompositionTimeOffset(uint32_t sampleIndex);
    142 
    143     static int CompareIncreasingTime(const void *, const void *);
    144 
    145     void buildSampleEntriesTable();
    146 
    147     SampleTable(const SampleTable &);
    148     SampleTable &operator=(const SampleTable &);
    149 };
    150 
    151 }  // namespace android
    152 
    153 #endif  // SAMPLE_TABLE_H_
    154