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 VisualSampleEntry Class */
21 /* ------------------------------------------------------------------- */
22 /*********************************************************************************/
23 /*
24 This VisualSampleEntry Class is used for visual streams.
25 */
26
27
28 #define IMPLEMENT_VisualSampleEntry
29
30 #include "visualsampleentry.h"
31 #include "atomutils.h"
32 #include "atomdefs.h"
33
34 #include "h263decoderspecificinfo.h"
35
36
VisualSampleEntry(MP4_FF_FILE * fp,uint32 size,uint32 type)37 VisualSampleEntry::VisualSampleEntry(MP4_FF_FILE *fp, uint32 size, uint32 type)
38 : SampleEntry(fp, size, type)
39 {
40 _pes = NULL;
41
42 if (_success)
43 {
44 _pparent = NULL;
45
46 // Read in all reserved members
47 for (int32 i = 0; i < 4; i++)
48 {
49 if (!AtomUtils::read32(fp, _reserved1[i]))
50 {
51 _success = false;
52 break;
53 }
54 }
55
56 if (_success)
57 {
58 if (!AtomUtils::read32read32(fp, _reserved2, _reserved3))
59 _success = false;
60 if (!AtomUtils::read32read32(fp, _reserved4, _reserved5))
61 _success = false;
62 if (!AtomUtils::read16(fp, _reserved6))
63 _success = false;
64
65 for (int32 i = 0; i < 32; i++)
66 {
67 if (!AtomUtils::read8(fp, _reserved7[i]))
68 {
69 _success = false;
70 break;
71 }
72 }
73
74 if (!AtomUtils::read16read16(fp, _reserved8, _reserved9))
75 _success = false;
76 }
77
78 if (_success)
79 {
80 uint32 atomType = UNKNOWN_ATOM;
81 uint32 atomSize = 0;
82
83 AtomUtils::getNextAtomType(fp, atomSize, atomType);
84
85 if (atomType == ESD_ATOM)
86 {
87
88 PV_MP4_FF_NEW(fp->auditCB, ESDAtom, (fp, atomSize, atomType), _pes);
89 if (!_pes->MP4Success())
90 {
91 _mp4ErrorCode = _pes->GetMP4Error();
92 _success = false;
93 }
94 else
95 {
96 if (_pes->getObjectTypeIndication() == H263_VIDEO)
97 {
98 const ESDescriptor *_pdescriptor = _pes->getESDescriptorPtr();
99 if (NULL != _pdescriptor)
100 {
101 H263DecoderSpecificInfo *_pH263decSpecificInfo =
102 (H263DecoderSpecificInfo *)(_pdescriptor->getDecoderSpecificInfo());
103 if (NULL != _pH263decSpecificInfo)
104 {
105 if (_pH263decSpecificInfo->_max_height <= 0)
106 _pH263decSpecificInfo->_max_height = (uint16)((_reserved2 << 16) >> 16);
107 if (_pH263decSpecificInfo->_max_width <= 0)
108 _pH263decSpecificInfo->_max_width = (uint16)(_reserved2 >> 16);
109 }
110 }
111 }
112 _pes->setParent(this);
113 }
114 }
115 else
116 {
117 _success = false;
118 _mp4ErrorCode = READ_VISUAL_SAMPLE_ENTRY_FAILED;
119 }
120 }
121 else
122 {
123 _mp4ErrorCode = READ_VISUAL_SAMPLE_ENTRY_FAILED;
124 }
125 }
126 else
127 {
128 _mp4ErrorCode = READ_VISUAL_SAMPLE_ENTRY_FAILED;
129 }
130
131 }
132
133 // Destructor
~VisualSampleEntry()134 VisualSampleEntry::~VisualSampleEntry()
135 {
136 if (_pes != NULL)
137 {
138 // Cleanup ESDAtom
139 PV_MP4_FF_DELETE(NULL, ESDAtom, _pes);
140 }
141 }
142
getESID() const143 uint32 VisualSampleEntry::getESID() const
144 {
145 if (_pes != NULL)
146 {
147 if (_pes->getESDescriptorPtr() != NULL)
148 {
149 return _pes->getESDescriptorPtr()->getESID();
150 }
151 else
152 {
153 return 0;
154 }
155 }
156 else
157 {
158 return 0;
159 }
160 }
161
getWidth() const162 uint16 VisualSampleEntry::getWidth() const
163 {
164 uint32 width = _reserved2 & 0xFFFF0000;
165 uint32 ret = width >> 16;
166 return (uint16)ret;
167
168 }
169
170