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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     This PVA_FF_DataReferenceAtom Class contains a table of data references which declare
     20     the location of the media data used within the MPEG-4 presentation.
     21 */
     22 
     23 
     24 #define IMPLEMENT_DataReferenceAtom
     25 
     26 #include "datareferenceatom.h"
     27 #include "dataentryurlatom.h"
     28 #include "a_atomdefs.h"
     29 #include "atomutils.h"
     30 
     31 typedef Oscl_Vector<PVA_FF_DataEntryAtom*, OsclMemAllocator> PVA_FF_DataEntryAtomVecType;
     32 
     33 // Constructor
     34 PVA_FF_DataReferenceAtom::PVA_FF_DataReferenceAtom()
     35         : PVA_FF_FullAtom(DATA_REFERENCE_ATOM, (uint8)0, (uint32)0)
     36 {
     37     init();
     38     recomputeSize();
     39 }
     40 
     41 // Destructor
     42 PVA_FF_DataReferenceAtom::~PVA_FF_DataReferenceAtom()
     43 {
     44     // Clean up vector of DataEntryAtoms
     45     for (uint32 i = 0; i < _pdataEntryVec->size(); i++)
     46     {
     47         PVA_FF_DataEntryUrlAtom *atom = (PVA_FF_DataEntryUrlAtom*)(*_pdataEntryVec)[i];
     48         PV_MP4_FF_DELETE(NULL, PVA_FF_DataEntryUrlAtom, atom);
     49     }
     50     PV_MP4_FF_TEMPLATED_DELETE(NULL, PVA_FF_DataEntryAtomVecType, Oscl_Vector, _pdataEntryVec);
     51 }
     52 
     53 void
     54 PVA_FF_DataReferenceAtom::init()
     55 {
     56     _entryCount = 0;
     57 
     58     PV_MP4_FF_NEW(fp->auditCB, PVA_FF_DataEntryAtomVecType, (), _pdataEntryVec);
     59 
     60     // Add default URLDataEntry with flag set indicating that the
     61     // media data is local to the file
     62     PVA_FF_DataEntryUrlAtom *deua = NULL;
     63     PV_MP4_FF_NEW(fp->auditCB, PVA_FF_DataEntryUrlAtom, ((uint32)1), deua);
     64     addDataEntryAtom(deua);
     65 
     66     recomputeSize();
     67 }
     68 
     69 void
     70 PVA_FF_DataReferenceAtom::addDataEntryAtom(PVA_FF_DataEntryAtom *atom)
     71 {
     72     _pdataEntryVec->push_back(atom);
     73     atom->setParent(this);
     74     _entryCount++;
     75 }
     76 
     77 
     78 // Rendering the PVA_FF_Atom in proper format (bitlengths, etc.) to an ostream
     79 bool
     80 PVA_FF_DataReferenceAtom::renderToFileStream(MP4_AUTHOR_FF_FILE_IO_WRAP *fp)
     81 {
     82     int32 rendered = 0;
     83 
     84     if (!renderAtomBaseMembers(fp))
     85     {
     86         return false;
     87     }
     88     rendered += getDefaultSize();
     89 
     90     if (!PVA_FF_AtomUtils::render32(fp, getEntryCount()))
     91     {
     92         return false;
     93     }
     94     rendered += 4;
     95 
     96     for (uint32 i = 0; i < _pdataEntryVec->size(); i++)
     97     {
     98         if (!(*_pdataEntryVec)[i]->renderToFileStream(fp))
     99         {
    100             return false;
    101         }
    102         rendered += (*_pdataEntryVec)[i]->getSize();
    103     }
    104 
    105     return true;
    106 }
    107 
    108 
    109 
    110 void
    111 PVA_FF_DataReferenceAtom::recomputeSize()
    112 {
    113     int32 size = getDefaultSize();
    114 
    115     size += 4; // For entry count
    116 
    117     for (uint32 i = 0; i < _pdataEntryVec->size(); i++)
    118     {
    119         size += (*_pdataEntryVec)[i]->getSize();
    120     }
    121 
    122     _size = size;
    123 
    124     // Update the size of the parent atoms
    125     if (_pparent != NULL)
    126     {
    127         _pparent->recomputeSize();
    128     }
    129 }
    130