/src/Zend/Media/Id3/Frame/Equa.php
http://php-reader.googlecode.com/ · PHP · 133 lines · 50 code · 10 blank · 73 comment · 5 complexity · 7cde2ee514024f9f3da72d0cf86f7bdc MD5 · raw file
- <?php
- /**
- * Zend Framework
- *
- * LICENSE
- *
- * This source file is subject to the new BSD license that is bundled
- * with this package in the file LICENSE.txt.
- * It is also available through the world-wide-web at this URL:
- * http://framework.zend.com/license/new-bsd
- * If you did not receive a copy of the license and are unable to
- * obtain it through the world-wide-web, please send an email
- * to license@zend.com so we can send you a copy immediately.
- *
- * @category Zend
- * @package Zend_Media
- * @subpackage ID3
- * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: Equa.php 177 2010-03-09 13:13:34Z svollbehr $
- * @deprecated ID3v2.3.0
- */
- /**#@+ @ignore */
- require_once 'Zend/Media/Id3/Frame.php';
- /**#@-*/
- /**
- * The <i>Equalisation</i> frame is another subjective, alignment frame. It
- * allows the user to predefine an equalisation curve within the audio file.
- * There may only be one EQUA frame in each tag.
- *
- * @category Zend
- * @package Zend_Media
- * @subpackage ID3
- * @author Sven Vollbehr <sven@vollbehr.eu>
- * @author Ryan Butterfield <buttza@gmail.com>
- * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- * @version $Id: Equa.php 177 2010-03-09 13:13:34Z svollbehr $
- * @deprecated ID3v2.3.0
- */
- final class Zend_Media_Id3_Frame_Equa extends Zend_Media_Id3_Frame
- {
- /** @var Array */
- private $_adjustments;
- /**
- * Constructs the class with given parameters and parses object related
- * data.
- *
- * @param Zend_Io_Reader $reader The reader object.
- * @param Array $options The options array.
- */
- public function __construct($reader = null, &$options = array())
- {
- parent::__construct($reader, $options);
- if ($this->_reader === null) {
- return;
- }
- $adjustmentBits = $this->_reader->readInt8();
- if ($adjustmentBits <= 8 || $adjustmentBits > 16) {
- require_once 'Zend/Media/Id3/Exception.php';
- throw new Zend_Media_Id3_Exception
- ('Unsupported adjustment bit size of: ' . $adjustmentBits);
- }
- while ($this->_reader->available()) {
- $frequency = $this->_reader->readUInt16BE();
- $this->_adjustments[($frequency & 0x7fff)] =
- ($frequency & 0x8000) == 0x8000 ?
- $this->_reader->readUInt16BE() :
- -$this->_reader->readUInt16BE();
- }
- ksort($this->_adjustments);
- }
- /**
- * Returns the array containing adjustments having frequencies as keys and
- * their corresponding adjustments as values.
- *
- * @return Array
- */
- public function getAdjustments()
- {
- return $this->_adjustments;
- }
- /**
- * Adds a volume adjustment setting for given frequency. The frequency can
- * have a value from 0 to 32767 Hz.
- *
- * @param integer $frequency The frequency, in hertz.
- * @param integer $adjustment The adjustment, in dB.
- */
- public function addAdjustment($frequency, $adjustment)
- {
- $this->_adjustments[$frequency] = $adjustment;
- ksort($this->_adjustments);
- }
- /**
- * Sets the adjustments array. The array must have frequencies as keys and
- * their corresponding adjustments as values. The frequency can have a value
- * from 0 to 32767 Hz. One frequency should only be described once in the
- * frame.
- *
- * @param Array $adjustments The adjustments array.
- */
- public function setAdjustments($adjustments)
- {
- $this->_adjustments = $adjustments;
- ksort($this->_adjustments);
- }
- /**
- * Writes the frame raw data without the header.
- *
- * @param Zend_Io_Writer $writer The writer object.
- * @return void
- */
- protected function _writeData($writer)
- {
- $writer->writeInt8(16);
- foreach ($this->_adjustments as $frequency => $adjustment) {
- $writer->writeUInt16BE
- ($adjustment > 0 ? $frequency | 0x8000 : $frequency & ~0x8000)
- ->writeUInt16BE(abs($adjustment));
- }
- }
- }