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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      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
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 /*********************************************************************************/
     19 /*     -------------------------------------------------------------------       */
     20 /*                        MPEG-4 TimeToSampleAtom Class                          */
     21 /*     -------------------------------------------------------------------       */
     22 /*********************************************************************************/
     23 /*
     24     This TimeToSampleAtom Class contains a compact version of a table that allows
     25     indexing from decoding to sample number.
     26 */
     27 
     28 
     29 #ifndef TIMETOSAMPLEATOM_H_INCLUDED
     30 #define TIMETOSAMPLEATOM_H_INCLUDED
     31 
     32 #ifndef OSCL_FILE_IO_H_INCLUDED
     33 #include "oscl_file_io.h"
     34 #endif
     35 
     36 #ifndef FULLATOM_H_INCLUDED
     37 #include "fullatom.h"
     38 #endif
     39 
     40 #define PV_ERROR -1
     41 
     42 class TimeToSampleAtom : public FullAtom
     43 {
     44 
     45     public:
     46         TimeToSampleAtom(MP4_FF_FILE *fp,
     47                          uint32 mediaType,
     48                          uint32 size,
     49                          uint32 type,
     50                          OSCL_wString& filename,
     51                          uint32 parsingMode = 0);
     52         virtual ~TimeToSampleAtom();
     53 
     54         // Member gets and sets
     55         uint32 getEntryCount() const
     56         {
     57             return _entryCount;
     58         }
     59 
     60         uint32 getSampleCountAt(int32 index);
     61         int32 getSampleDeltaAt(int32 index);
     62         int32 getSampleNumberFromTimestamp(uint32 ts,
     63                                            bool oAlwaysRetSampleCount = false);
     64         int32 getTimeDeltaForSampleNumber(uint32 num);
     65         int32 getTimestampForSampleNumber(uint32 num);
     66 
     67         int32 getTimeDeltaForSampleNumberPeek(uint32 num);
     68         int32 getTimeDeltaForSampleNumberGet(uint32 num);
     69 
     70         int32 resetStateVariables();
     71         int32 resetStateVariables(uint32 sampleNum);
     72 
     73         int32 resetPeekwithGet();
     74         uint32 getCurrPeekSampleCount()
     75         {
     76             return _currPeekSampleCount;
     77         }
     78 
     79 
     80 
     81     private:
     82         bool ParseEntryUnit(uint32 entry_cnt);
     83         void CheckAndParseEntry(uint32 i);
     84         uint32 _entryCount;
     85 
     86         uint32 *_psampleCountVec;
     87         uint32 *_psampleDeltaVec;
     88 
     89         uint32 _mediaType;
     90 
     91         // For visual samples
     92         uint32 _currentTimestamp;
     93 
     94         MP4_FF_FILE *_fileptr;
     95 
     96         MP4_FF_FILE *_curr_fptr;
     97         uint32 *_stbl_fptr_vec;
     98         uint32 _stbl_buff_size;
     99         uint32 _curr_entry_point;
    100         uint32 _curr_buff_number;
    101         uint32 _next_buff_number;
    102 
    103         uint32  _parsed_entry_cnt;
    104 
    105         uint32 _currGetSampleCount;
    106         int32 _currGetIndex;
    107         int32 _currGetTimeDelta;
    108         uint32 _currPeekSampleCount;
    109         int32 _currPeekIndex;
    110         int32 _currPeekTimeDelta;
    111         uint32 _parsing_mode;
    112         PVLogger *iLogger, *iStateVarLogger, *iParsedDataLogger;
    113 
    114 };
    115 
    116 #endif  // TIMETOSAMPLEATOM_H_INCLUDED
    117 
    118