Add enhanced support for ASF files
git-svn-id: http://php-reader.googlecode.com/svn/trunk@108 51a70ab9-7547-0410-9469-37e369ee0574
This commit is contained in:
svollbehr
@@ -1,143 +1,143 @@
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<?php
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/**
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* PHP Reader Library
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*
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* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the project workgroup nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package php-reader
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* @subpackage ASF
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* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
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* @license http://code.google.com/p/php-reader/wiki/License New BSD License
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* @version $Id$
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*/
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/**#@+ @ignore */
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require_once("ASF/Object.php");
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/**#@-*/
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/**
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* For each video stream in an ASF file, there should be one instance of the
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* <i>Simple Index Object</i>. Additionally, the instances of the <i>Simple
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* Index Object</i> shall be ordered by stream number.
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*
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* Index entries in the <i>Simple Index Object</i> are in terms of
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* <i>Presentation Times</i>. The corresponding <i>Packet Number</i> field
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* values (of the <i>Index Entry</i>, see below) indicate the packet number of
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* the ASF <i>Data Packet</i> with the closest past key frame. Note that for
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* video streams that contain both key frames and non-key frames, the <i>Packet
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* Number</i> field will always point to the closest past key frame.
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*
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* @package php-reader
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* @subpackage ASF
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* @author Sven Vollbehr <svollbehr@gmail.com>
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* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
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* @license http://code.google.com/p/php-reader/wiki/License New BSD License
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* @version $Rev$
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*/
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final class ASF_Object_SimpleIndex extends ASF_Object
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{
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/** @var string */
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private $_fileId;
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/** @var integer */
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private $_indexEntryTimeInterval;
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/** @var integer */
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private $_maximumPacketCount;
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/** @var Array */
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private $_indexEntries = array();
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/**
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* Constructs the class with given parameters and reads object related data
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* from the ASF file.
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*
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* @param Reader $reader The reader object.
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* @param Array $options The options array.
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*/
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public function __construct($reader, &$options = array())
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{
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parent::__construct($reader, $options);
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$this->_fileId = $this->_reader->readGUID();
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$this->_indexEntryTimeInterval = $this->_reader->readInt64LE();
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$this->_maximumPacketCount = $this->_reader->readUInt32LE();
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$indexEntriesCount = $this->_reader->readUInt32LE();
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for ($i = 1; $i < $indexEntriesCount; $i++) {
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$this->_indexEntries[] = array
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("packetNumber" => $this->_reader->readUInt32LE(),
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"packetCount" => $this->_reader->readUInt16LE());
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}
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}
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/**
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* Returns the unique identifier for this ASF file. The value of this field
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* should be changed every time the file is modified in any way. The value of
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* this field may be set to 0 or set to be identical to the value of the
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* <i>File ID</i> field of the <i>Data Object</i> and the <i>Header
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* Object</i>.
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*
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* @return string
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*/
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public function getFileId() { return $this->_fileId; }
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/**
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* Returns the time interval between each index entry in 100-nanosecond units.
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* The most common value is 10000000, to indicate that the index entries are
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* in 1-second intervals, though other values can be used as well.
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*
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* @return integer
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*/
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public function getIndexEntryTimeInterval()
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{
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return $this->_indexEntryTimeInterval;
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}
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/**
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* Returns the maximum <i>Packet Count</i> value of all <i>Index Entries</i>.
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*
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* @return integer
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*/
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public function getMaximumPacketCount() { return $this->_maximumPacketCount; }
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/**
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* Returns an array of index entries. Each entry consists of the following
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* keys.
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*
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* o packetNumber -- Specifies the number of the Data Packet associated
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* with this index entry. Note that for video streams that contain both
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* key frames and non-key frames, this field will always point to the
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* closest key frame prior to the time interval.
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*
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* o packetCount -- Specifies the number of Data Packets to send at this
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* index entry. If a video key frame has been fragmented into two <i>Data
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* Packets</i>, the value of this field will be equal to 2.
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*
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* @return Array
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*/
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public function getIndexEntries() { return $this->_indexEntries; }
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}
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<?php
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/**
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* PHP Reader Library
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*
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* Copyright (c) 2008 The PHP Reader Project Workgroup. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the project workgroup nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package php-reader
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* @subpackage ASF
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* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
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* @license http://code.google.com/p/php-reader/wiki/License New BSD License
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* @version $Id$
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*/
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/**#@+ @ignore */
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require_once("ASF/Object.php");
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/**#@-*/
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/**
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* For each video stream in an ASF file, there should be one instance of the
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* <i>Simple Index Object</i>. Additionally, the instances of the <i>Simple
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* Index Object</i> shall be ordered by stream number.
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*
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* Index entries in the <i>Simple Index Object</i> are in terms of
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* <i>Presentation Times</i>. The corresponding <i>Packet Number</i> field
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* values (of the <i>Index Entry</i>, see below) indicate the packet number of
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* the ASF <i>Data Packet</i> with the closest past key frame. Note that for
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* video streams that contain both key frames and non-key frames, the <i>Packet
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* Number</i> field will always point to the closest past key frame.
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*
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* @package php-reader
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* @subpackage ASF
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* @author Sven Vollbehr <svollbehr@gmail.com>
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* @copyright Copyright (c) 2008 The PHP Reader Project Workgroup
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* @license http://code.google.com/p/php-reader/wiki/License New BSD License
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* @version $Rev$
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*/
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final class ASF_Object_SimpleIndex extends ASF_Object
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{
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/** @var string */
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private $_fileId;
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/** @var integer */
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private $_indexEntryTimeInterval;
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/** @var integer */
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private $_maximumPacketCount;
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/** @var Array */
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private $_indexEntries = array();
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/**
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* Constructs the class with given parameters and reads object related data
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* from the ASF file.
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*
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* @param Reader $reader The reader object.
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* @param Array $options The options array.
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*/
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public function __construct($reader, &$options = array())
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{
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parent::__construct($reader, $options);
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$this->_fileId = $this->_reader->readGUID();
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$this->_indexEntryTimeInterval = $this->_reader->readInt64LE();
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$this->_maximumPacketCount = $this->_reader->readUInt32LE();
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$indexEntriesCount = $this->_reader->readUInt32LE();
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for ($i = 0; $i < $indexEntriesCount; $i++) {
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$this->_indexEntries[] = array
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("packetNumber" => $this->_reader->readUInt32LE(),
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"packetCount" => $this->_reader->readUInt16LE());
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}
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}
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/**
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* Returns the unique identifier for this ASF file. The value of this field
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* should be changed every time the file is modified in any way. The value of
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* this field may be set to 0 or set to be identical to the value of the
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* <i>File ID</i> field of the <i>Data Object</i> and the <i>Header
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* Object</i>.
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*
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* @return string
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*/
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public function getFileId() { return $this->_fileId; }
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/**
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* Returns the time interval between each index entry in 100-nanosecond units.
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* The most common value is 10000000, to indicate that the index entries are
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* in 1-second intervals, though other values can be used as well.
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*
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* @return integer
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*/
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public function getIndexEntryTimeInterval()
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{
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return $this->_indexEntryTimeInterval;
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}
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/**
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* Returns the maximum <i>Packet Count</i> value of all <i>Index Entries</i>.
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*
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* @return integer
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*/
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public function getMaximumPacketCount() { return $this->_maximumPacketCount; }
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/**
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* Returns an array of index entries. Each entry consists of the following
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* keys.
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*
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* o packetNumber -- Specifies the number of the Data Packet associated
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* with this index entry. Note that for video streams that contain both
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* key frames and non-key frames, this field will always point to the
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* closest key frame prior to the time interval.
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*
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* o packetCount -- Specifies the number of <i>Data Packets</i> to send at
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* this index entry. If a video key frame has been fragmented into two
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* Data Packets, the value of this field will be equal to 2.
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*
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* @return Array
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*/
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public function getIndexEntries() { return $this->_indexEntries; }
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}
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