1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
<?php
/**
* PHP Reader Library
*
* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the project workgroup nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* @package php-reader
* @subpackage ISO 14496
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Id: TFHD.php 92 2008-05-10 13:43:14Z svollbehr $
*/
/**#@+ @ignore */
require_once("ISO14496/Box/Full.php");
/**#@-*/
/**
* Each movie fragment can add zero or more <i>Track Fragment Header Box</i> to
* each track; and a track fragment can add zero or more contiguous runs of
* samples. The track fragment header sets up information and defaults used for
* those runs of samples.
*
* @package php-reader
* @subpackage ISO 14496
* @author Sven Vollbehr <svollbehr@gmail.com>
* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
* @license http://code.google.com/p/php-reader/wiki/License New BSD License
* @version $Rev: 92 $
*/
final class ISO14496_Box_TFHD extends ISO14496_Box_Full
{
/** @var integer */
private $_trackId;
/** @var integer */
private $_defaultSampleDescriptionIndex;
/** @var integer */
private $_defaultSampleDuration;
/** @var integer */
private $_defaultSampleSize;
/** @var integer */
private $_defaultSampleFlags;
/**
* Indicates indicates the presence of the baseDataOffset field. This provides
* an explicit anchor for the data offsets in each track run (see below). If
* not provided, the base-dataoffset for the first track in the movie fragment
* is the position of the first byte of the enclosing Movie Fragment Box, and
* for second and subsequent track fragments, the default is the end of the
* data defined by the preceding fragment. Fragments inheriting their offset
* in this way must all use the same data-reference (i.e., the data for these
* tracks must be in the same file).
*/
const BASE_DATA_OFFSET = 0x1;
/**
* Indicates the presence of the sampleDescriptionIndex field, which
* over-rides, in this fragment, the default set up in the
* {@link ISO14496_Box_TREX Track Extends Box}.
*/
const SAMPLE_DESCRIPTION_INDEX = 0x2;
/** Indicates the precense of the defaultSampleDuration field. */
const DEFAULT_SAMPLE_DURATION = 0x8;
/** Indicates the precense of the defaultSampleSize field. */
const DEFAULT_SAMPLE_SIZE = 0x10;
/** Indicates the precense of the defaultSampleFlags field. */
const DEFAULT_SAMPLE_DURATION = 0x20;
/**
* Indicates that the duration provided in either defaultSampleDuration, or by
* the defaultDuration in the {@link ISO14496_Box_TREX Track Extends Box}, is
* empty, i.e. that there are no samples for this time interval.
*/
const DURATION_IS_EMPTY = 0x10000;
/**
* Constructs the class with given parameters and reads box related data from
* the ISO Base Media file.
*
* @param Reader $reader The reader object.
* @todo The sample flags could be parsed further
*/
public function __construct($reader, &$options = array())
{
parent::__construct($reader, $options);
$this->_trackId = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::BASE_DATA_OFFSET))
$this->_baseDataOffset = $this->_reader->readInt64BE();
if ($this->hasFlag(self::SAMPLE_DESCRIPTION_INDEX))
$this->_sampleDescriptionIndex = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::DEFAULT_SAMPLE_DURATION))
$this->_defaultSampleDuration = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::DEFAULT_SAMPLE_SIZE))
$this->_defaultSampleSize = $this->_reader->readUInt32BE();
if ($this->hasFlag(self::DEFAULT_SAMPLE_FLAGS))
$this->_defaultSampleFlags = $this->_reader->readUInt32BE();
}
/**
* Returns the track identifier.
*
* @return integer
*/
public function getTrackId()
{
return $this->_trackId;
}
/**
* Returns the base offset to use when calculating data offsets.
*
* @return integer
*/
public function getBaseDataOffset()
{
return $this->_baseDataOffset;
}
/**
* Returns the sample description index.
*
* @return integer
*/
public function getSampleDescriptionIndex()
{
return $this->_defaultSampleDescriptionIndex;
}
/**
* Returns the default sample duration.
*
* @return integer
*/
public function getDefaultSampleDuration()
{
return $this->_defaultSampleDuration;
}
/**
* Returns the default sample size.
*
* @return integer
*/
public function getDefaultSampleSize()
{
return $this->_defaultSampleSize;
}
/**
* Returns the default sample flags.
*
* @return integer
*/
public function getDefaultSampleFlags()
{
return $this->_defaultSampleFlags;
}
}
|
