/Vendor/phpvideotoolkit/adapters/ffmpeg-php/php-reader/src/ID3/Frame/RVAD.php

<?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 ID3

 * @copyright  Copyright (c) 2008 The PHP Reader Project Workgroup

 * @license    http://code.google.com/p/php-reader/wiki/License New BSD License

 * @version    $Id: RVAD.php 75 2008-04-14 23:57:21Z svollbehr $

 * @deprecated ID3v2.3.0

 */



/**#@+ @ignore */

require_once("ID3/Frame.php");

/**#@-*/



/**

 * The <i>Relative volume adjustment</i> frame is a more subjective function

 * than the previous ones. It allows the user to say how much he wants to

 * increase/decrease the volume on each channel while the file is played. The

 * purpose is to be able to align all files to a reference volume, so that you

 * don't have to change the volume constantly. This frame may also be used to

 * balance adjust the audio.

 *

 * There may only be one RVAD frame in each tag.

 *

 * @package    php-reader

 * @subpackage ID3

 * @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: 75 $

 * @deprecated ID3v2.3.0

 */

final class ID3_Frame_RVAD extends ID3_Frame

{

  /** @var Array */

  private $_adjustments;

  

  /**

   * Constructs the class with given parameters and parses object related data.

   *

   * @param Reader $reader The reader object.

   * @param Array $options The options array.

   */

  public function __construct($reader = null, &$options = array())

  {

    parent::__construct($reader, $options);

    

    if ($reader === null)

      return;

    

    $flags = Transform::fromInt8($this->_data[0]);

    $descriptionBits = Transform::fromInt8($this->_data[0]); //16

    

    $this->_adjustments["right"] =

      ($flags & 0x20) == 0x20 ?

       Transform::fromUInt16BE(substr($this->_data, 0, 2)) :

       -Transform::fromUInt16BE(substr($this->_data, 0, 2));

    $this->_adjustments["left"] =

      ($flags & 0x10) == 0x10 ?

       Transform::fromUInt16BE(substr($this->_data, 2, 2)) :

       -Transform::fromUInt16BE(substr($this->_data, 2, 2));

    $this->_adjustments["peakRight"] =

      Transform::fromUInt16BE(substr($this->_data, 4, 2));

    $this->_adjustments["peakLeft"] =

      Transform::fromUInt16BE(substr($this->_data, 6, 2));



    if ($this->getSize() <= 8)

      return;

    

    $this->_adjustments["rightBack"] =

      ($flags & 0x8) == 0x8 ?

       Transform::fromUInt16BE(substr($this->_data, 8, 2)) :

       -Transform::fromUInt16BE(substr($this->_data, 8, 2));

    $this->_adjustments["leftBack"] =

      ($flags & 0x4) == 0x4 ?

       Transform::fromUInt16BE(substr($this->_data, 10, 2)) :

       -Transform::fromUInt16BE(substr($this->_data, 10, 2));

    $this->_adjustments["peakRightBack"] =

      Transform::fromUInt16BE(substr($this->_data, 12, 2));

    $this->_adjustments["peakLeftBack"] =

      Transform::fromUInt16BE(substr($this->_data, 14, 2));



    if ($this->getSize() <= 16)

      return;

    

    $this->_adjustments["center"] =

      ($flags & 0x2) == 0x2 ?

       Transform::fromUInt16BE(substr($this->_data, 16, 2)) :

       -Transform::fromUInt16BE(substr($this->_data, 16, 2));

    $this->_adjustments["peakCenter"] =

      Transform::fromUInt16BE(substr($this->_data, 18, 2));

    

    if ($this->getSize() <= 20)

      return;

    

    $this->_adjustments["bass"] =

      ($flags & 0x1) == 0x1 ?

       Transform::fromUInt16BE(substr($this->_data, 20, 2)) :

       -Transform::fromUInt16BE(substr($this->_data, 20, 2));

    $this->_adjustments["peakBass"] =

      Transform::fromUInt16BE(substr($this->_data, 22, 2));

  }



  /**

   * Returns the array containing the volume adjustments. The array must contain

   * the following keys: right, left, peakRight, peakLeft. It may optionally

   * contain the following keys: rightBack, leftBack, peakRightBack,

   * peakLeftBack, center, peakCenter, bass, and peakBass.

   * 

   * @return Array

   */

  public function getAdjustments() { return $this->_adjustments; }

  

  /**

   * Sets the array of volume adjustments. The array must contain the following

   * keys: right, left, peakRight, peakLeft. It may optionally contain the

   * following keys: rightBack, leftBack, peakRightBack, peakLeftBack, center,

   * peakCenter, bass, and peakBass.

   * 

   * @param Array $adjustments The volume adjustments array.

   */

  public function setAdjustments($adjustments)

  {

    $this->_adjustments = $adjustments;

  }

  

  /**

   * Returns the frame raw data.

   *

   * @return string

   */

  public function __toString()

  {

    $flags = 0;

    if ($this->_adjustments["right"] > 0)

      $flags = $flags | 0x20;

    if ($this->_adjustments["left"] > 0)

      $flags = $flags | 0x10;

    $data = Transform::toInt8(16) . 

      Transform::toUInt16BE(abs($this->_adjustments["right"])) .

      Transform::toUInt16BE(abs($this->_adjustments["left"])) .

      Transform::toUInt16BE(abs($this->_adjustments["peakRight"])) .

      Transform::toUInt16BE(abs($this->_adjustments["peakLeft"]));

    

    if (isset($this->_adjustments["rightBack"]) &&

        isset($this->_adjustments["leftBack"]) &&

        isset($this->_adjustments["peakRightBack"]) &&

        isset($this->_adjustments["peakLeftBack"])) {

      if ($this->_adjustments["rightBack"] > 0)

        $flags = $flags | 0x8;

      if ($this->_adjustments["leftBack"] > 0)

        $flags = $flags | 0x4;

      $data .= 

        Transform::toUInt16BE(abs($this->_adjustments["rightBack"])) .

        Transform::toUInt16BE(abs($this->_adjustments["leftBack"])) .

        Transform::toUInt16BE(abs($this->_adjustments["peakRightBack"])) .

        Transform::toUInt16BE(abs($this->_adjustments["peakLeftBack"]));

    }

    

    if (isset($this->_adjustments["center"]) &&

        isset($this->_adjustments["peakCenter"])) {

      if ($this->_adjustments["center"] > 0)

        $flags = $flags | 0x2;

      $data .= 

        Transform::toUInt16BE(abs($this->_adjustments["center"])) .

        Transform::toUInt16BE(abs($this->_adjustments["peakCenter"]));

    }

    

    if (isset($this->_adjustments["bass"]) &&

        isset($this->_adjustments["peakBass"])) {

      if ($this->_adjustments["bass"] > 0)

        $flags = $flags | 0x1;

      $data .= 

        Transform::toUInt16BE(abs($this->_adjustments["bass"])) .

        Transform::toUInt16BE(abs($this->_adjustments["peakBass"]));

    }

    $this->setData(Transform::toInt8($flags) . $data);

    return parent::__toString();

  }

}