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
PVA_FF_DataReferenceAtom()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
~PVA_FF_DataReferenceAtom()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
init()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
addDataEntryAtom(PVA_FF_DataEntryAtom * atom)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
renderToFileStream(MP4_AUTHOR_FF_FILE_IO_WRAP * fp)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
recomputeSize()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