Add Zend_Media_Mpeg class proposal
git-svn-id: http://php-reader.googlecode.com/svn/branches/zend@172 51a70ab9-7547-0410-9469-37e369ee0574
This commit is contained in:
svollbehr
@@ -1,223 +1,223 @@
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<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
|
||||
* with this package in the file LICENSE.txt.
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||||
* It is also available through the world-wide-web at this URL:
|
||||
* http://framework.zend.com/license/new-bsd
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||||
* 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
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||||
* to license@zend.com so we can send you a copy immediately.
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||||
*
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||||
* @category Zend
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* @package Zend_Io
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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*/
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/**
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* A utility class to perform bit twiddling on integers.
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*
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* @category Zend
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* @package Zend_Bit
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* @author Ryan Butterfield <buttza@gmail.com>
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* @author Sven Vollbehr <sven@vollbehr.eu>
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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* @static
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*/
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final class Zend_Bit_Twiddling
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{
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/**
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* Default private constructor for a static class.
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*/
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private function __construct()
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{
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}
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/**
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* Sets a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to set.
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* @param boolean $on Whether to enable or clear the bit.
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* @return integer
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*/
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public static function setBit($integer, $position, $on)
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{
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return $on ? self::enableBit($integer, $position) :
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self::clearBit($integer, $position);
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}
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/**
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* Enables a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to enable.
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* @return integer
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*/
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public static function enableBit($integer, $position)
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{
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return $integer | (1 << $position);
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}
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/**
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* Clears a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to clear.
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* @return integer
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*/
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public static function clearBit($integer, $position)
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{
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return $integer & ~(1 << $position);
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}
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/**
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* Toggles a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to toggle.
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* @return integer
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*/
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public static function toggleBit($integer, $position)
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{
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return $integer ^ (1 << $position);
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}
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/**
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* Tests a bit at a given position in an integer.
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*
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* @param integer $integer The value to test.
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* @param integer $position The position of the bit to test.
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* @return boolean
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*/
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public static function testBit($integer, $position)
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{
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return ($integer & (1 << $position)) != 0;
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}
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/**
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* Sets a given set of bits in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $bits The bits to set.
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* @param boolean $on Whether to enable or clear the bits.
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* @return integer
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*/
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public static function setBits($integer, $bits, $on)
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{
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return $on ? self::enableBits($integer, $bits) :
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self::clearBits($integer, $bits);
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}
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/**
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* Enables a given set of bits in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $bits The bits to enable.
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* @return integer
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*/
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public static function enableBits($integer, $bits)
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{
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return $integer | $bits;
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}
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|
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/**
|
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* Clears a given set of bits in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $bits The bits to clear.
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* @return integer
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*/
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public static function clearBits($integer, $bits)
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{
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return $integer & ~$bits;
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}
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|
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/**
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* Toggles a given set of bits in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $bits The bits to toggle.
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* @return integer
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*/
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public static function toggleBits($integer, $bits)
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{
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return $integer ^ $bits;
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}
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/**
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* Tests a given set of bits in an integer
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* returning whether all bits are set.
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*
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* @param integer $integer The value to test.
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* @param integer $bits The bits to test.
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* @return boolean
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*/
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public static function testAllBits($integer, $bits)
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{
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return ($integer & $bits) == $bits;
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}
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|
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/**
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* Tests a given set of bits in an integer
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* returning whether any bits are set.
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*
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* @param integer $integer The value to test.
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* @param integer $bits The bits to test.
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* @return boolean
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*/
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public static function testAnyBits($integer, $bits)
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{
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return ($integer & $bits) != 0;
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}
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/**
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* Stores a value in a given range in an integer.
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*
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* @param integer $integer The value to store into.
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* @param integer $start The position to store from. Must be <= $end.
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* @param integer $end The position to store to. Must be >= $start.
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* @param integer $value The value to store.
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* @return integer
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*/
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public static function setValue($integer, $start, $end, $value)
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{
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return self::clearBits
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($integer, self::getMask
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($start, $end) << $start) | ($value << $start);
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}
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/**
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* Retrieves a value from a given range in an integer, inclusive.
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*
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* @param integer $integer The value to read from.
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* @param integer $start The position to read from. Must be <= $end.
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* @param integer $end The position to read to. Must be >= $start.
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* @return integer
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*/
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public static function getValue($integer, $start, $end)
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{
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return ($integer & self::getMask($start, $end)) >> $start;
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}
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/**
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* Returns an integer with all bits set from start to end.
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*
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* @param integer $start The position to start setting bits from. Must
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* be <= $end.
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* @param integer $end The position to stop setting bits. Must
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* be >= $start.
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* @return integer
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*/
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public static function getMask($start, $end)
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{
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return ($tmp = (1 << $end)) + $tmp - (1 << $start);
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}
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}
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<?php
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/**
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* Zend Framework
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||||
*
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||||
* LICENSE
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||||
*
|
||||
* 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.
|
||||
*
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||||
* @category Zend
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||||
* @package Zend_Bit
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
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||||
*/
|
||||
|
||||
/**
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* A utility class to perform bit twiddling on integers.
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*
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||||
* @category Zend
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* @package Zend_Bit
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* @author Ryan Butterfield <buttza@gmail.com>
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* @author Sven Vollbehr <sven@vollbehr.eu>
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* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id$
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* @static
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*/
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final class Zend_Bit_Twiddling
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{
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/**
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* Default private constructor for a static class.
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*/
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private function __construct()
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||||
{
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}
|
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|
||||
/**
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* Sets a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to set.
|
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* @param boolean $on Whether to enable or clear the bit.
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* @return integer
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*/
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public static function setBit($integer, $position, $on)
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{
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return $on ? self::enableBit($integer, $position) :
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self::clearBit($integer, $position);
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}
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/**
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* Enables a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to enable.
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* @return integer
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*/
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public static function enableBit($integer, $position)
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{
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return $integer | (1 << $position);
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}
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/**
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* Clears a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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* @param integer $position The position of the bit to clear.
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* @return integer
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*/
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public static function clearBit($integer, $position)
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{
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return $integer & ~(1 << $position);
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}
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/**
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||||
* Toggles a bit at a given position in an integer.
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*
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* @param integer $integer The value to manipulate.
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||||
* @param integer $position The position of the bit to toggle.
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* @return integer
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*/
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||||
public static function toggleBit($integer, $position)
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||||
{
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||||
return $integer ^ (1 << $position);
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||||
}
|
||||
|
||||
/**
|
||||
* Tests a bit at a given position in an integer.
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*
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* @param integer $integer The value to test.
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||||
* @param integer $position The position of the bit to test.
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* @return boolean
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*/
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public static function testBit($integer, $position)
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{
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return ($integer & (1 << $position)) != 0;
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}
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||||
|
||||
/**
|
||||
* Sets a given set of bits in an integer.
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||||
*
|
||||
* @param integer $integer The value to manipulate.
|
||||
* @param integer $bits The bits to set.
|
||||
* @param boolean $on Whether to enable or clear the bits.
|
||||
* @return integer
|
||||
*/
|
||||
public static function setBits($integer, $bits, $on)
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||||
{
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||||
return $on ? self::enableBits($integer, $bits) :
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self::clearBits($integer, $bits);
|
||||
}
|
||||
|
||||
/**
|
||||
* Enables a given set of bits in an integer.
|
||||
*
|
||||
* @param integer $integer The value to manipulate.
|
||||
* @param integer $bits The bits to enable.
|
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* @return integer
|
||||
*/
|
||||
public static function enableBits($integer, $bits)
|
||||
{
|
||||
return $integer | $bits;
|
||||
}
|
||||
|
||||
/**
|
||||
* Clears a given set of bits in an integer.
|
||||
*
|
||||
* @param integer $integer The value to manipulate.
|
||||
* @param integer $bits The bits to clear.
|
||||
* @return integer
|
||||
*/
|
||||
public static function clearBits($integer, $bits)
|
||||
{
|
||||
return $integer & ~$bits;
|
||||
}
|
||||
|
||||
/**
|
||||
* Toggles a given set of bits in an integer.
|
||||
*
|
||||
* @param integer $integer The value to manipulate.
|
||||
* @param integer $bits The bits to toggle.
|
||||
* @return integer
|
||||
*/
|
||||
public static function toggleBits($integer, $bits)
|
||||
{
|
||||
return $integer ^ $bits;
|
||||
}
|
||||
|
||||
/**
|
||||
* Tests a given set of bits in an integer
|
||||
* returning whether all bits are set.
|
||||
*
|
||||
* @param integer $integer The value to test.
|
||||
* @param integer $bits The bits to test.
|
||||
* @return boolean
|
||||
*/
|
||||
public static function testAllBits($integer, $bits)
|
||||
{
|
||||
return ($integer & $bits) == $bits;
|
||||
}
|
||||
|
||||
/**
|
||||
* Tests a given set of bits in an integer
|
||||
* returning whether any bits are set.
|
||||
*
|
||||
* @param integer $integer The value to test.
|
||||
* @param integer $bits The bits to test.
|
||||
* @return boolean
|
||||
*/
|
||||
public static function testAnyBits($integer, $bits)
|
||||
{
|
||||
return ($integer & $bits) != 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Stores a value in a given range in an integer.
|
||||
*
|
||||
* @param integer $integer The value to store into.
|
||||
* @param integer $start The position to store from. Must be <= $end.
|
||||
* @param integer $end The position to store to. Must be >= $start.
|
||||
* @param integer $value The value to store.
|
||||
* @return integer
|
||||
*/
|
||||
public static function setValue($integer, $start, $end, $value)
|
||||
{
|
||||
return self::clearBits
|
||||
($integer, self::getMask
|
||||
($start, $end) << $start) | ($value << $start);
|
||||
}
|
||||
|
||||
/**
|
||||
* Retrieves a value from a given range in an integer, inclusive.
|
||||
*
|
||||
* @param integer $integer The value to read from.
|
||||
* @param integer $start The position to read from. Must be <= $end.
|
||||
* @param integer $end The position to read to. Must be >= $start.
|
||||
* @return integer
|
||||
*/
|
||||
public static function getValue($integer, $start, $end)
|
||||
{
|
||||
return ($integer & self::getMask($start, $end)) >> $start;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns an integer with all bits set from start to end.
|
||||
*
|
||||
* @param integer $start The position to start setting bits from. Must
|
||||
* be <= $end.
|
||||
* @param integer $end The position to stop setting bits. Must
|
||||
* be >= $start.
|
||||
* @return integer
|
||||
*/
|
||||
public static function getMask($start, $end)
|
||||
{
|
||||
return ($tmp = (1 << $end)) + $tmp - (1 << $start);
|
||||
}
|
||||
}
|
||||
|
||||
@@ -442,7 +442,7 @@ final class Zend_Media_Id3v2 extends Zend_Media_Id3_Object
|
||||
if ($filename === null && ($filename = $this->_filename) === null) {
|
||||
require_once 'Zend/Media/Id3/Exception.php';
|
||||
throw new Zend_Media_Id3_Exception
|
||||
('No file given to write the tag to');
|
||||
('No file given to write to');
|
||||
} else if ($filename !== null && $filename instanceof Zend_Io_Writer) {
|
||||
require_once 'Zend/Io/Writer.php';
|
||||
$this->_writeData($filename);
|
||||
|
||||
@@ -301,14 +301,13 @@ final class Zend_Media_Iso14496 extends Zend_Media_Iso14496_Box
|
||||
}
|
||||
|
||||
/**
|
||||
* Writes the changes back to the original media file. If the class was
|
||||
* constructed without a file name, one can be provided here as an argument.
|
||||
* Writes the changes back to given media file.
|
||||
*
|
||||
* The write operation commits only changes made to the Movie Box. It
|
||||
* further changes the order of the Movie Box and Media Data Box in a way
|
||||
* compatible for progressive download from a web page.
|
||||
*
|
||||
* All file offsets must be assumed to be invalid after the write operation.
|
||||
* All box offsets must be assumed to be invalid after the write operation.
|
||||
*
|
||||
* @param string $filename The optional path to the file, use null to save
|
||||
* to the same file.
|
||||
@@ -318,7 +317,7 @@ final class Zend_Media_Iso14496 extends Zend_Media_Iso14496_Box
|
||||
if ($filename === null && ($filename = $this->_filename) === null) {
|
||||
require_once 'Zend/Media/Iso14496/Exception.php';
|
||||
throw new Zend_Media_Iso14496_Exception
|
||||
('No file given to write the tag to');
|
||||
('No file given to write to');
|
||||
} else if ($filename !== null && $this->_filename !== null &&
|
||||
realpath($filename) != realpath($this->_filename) &&
|
||||
!copy($this->_filename, $filename)) {
|
||||
|
||||
@@ -56,10 +56,10 @@ class Zend_Media_Iso14496_Box
|
||||
private $_options;
|
||||
|
||||
/** @var integer */
|
||||
private $_offset = -1;
|
||||
private $_offset = false;
|
||||
|
||||
/** @var integer */
|
||||
private $_size = -1;
|
||||
private $_size = false;
|
||||
|
||||
/** @var string */
|
||||
private $_type;
|
||||
@@ -168,7 +168,8 @@ class Zend_Media_Iso14496_Box
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the file offset to box start, or -1 if the box was created on heap.
|
||||
* Returns the file offset to box start, or <var>false</var> if the box was
|
||||
* created on heap.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
@@ -189,8 +190,8 @@ class Zend_Media_Iso14496_Box
|
||||
|
||||
/**
|
||||
* Returns the box size in bytes read from the file, including the size and
|
||||
* type header, fields, and all contained boxes, or -1 if the box was
|
||||
* created on heap.
|
||||
* type header, fields, and all contained boxes, or <var>false</var> if the
|
||||
* box was created on heap.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
|
||||
425
src/Zend/Media/Mpeg/Abs.php
Normal file
425
src/Zend/Media/Mpeg/Abs.php
Normal file
@@ -0,0 +1,425 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Zend/Media/Mpeg/Abs/Object.php';
|
||||
require_once 'Zend/Media/Mpeg/Abs/Frame.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* This class represents an MPEG Audio Bit Stream as described in
|
||||
* ISO/IEC 11172-3 and ISO/IEC 13818-3 standards.
|
||||
*
|
||||
* Non-standard VBR header extensions or namely XING, VBRI and LAME headers are
|
||||
* supported.
|
||||
*
|
||||
* This class is optimized for fast determination of the play duration of the
|
||||
* file and hence uses lazy data reading mode by default. In this mode the
|
||||
* actual frames and frame data are only read when referenced directly. You may
|
||||
* change this behaviour by giving an appropriate option to the constructor.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Ryan Butterfield <buttza@gmail.com>
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
* @todo Implement validation routines
|
||||
*/
|
||||
final class Zend_Media_Mpeg_Abs extends Zend_Media_Mpeg_Abs_Object
|
||||
{
|
||||
/** @var integer */
|
||||
private $_bytes;
|
||||
|
||||
/** @var Array */
|
||||
private $_frames = array();
|
||||
|
||||
/** @var Zend_Media_Mpeg_Abs_XingHeader */
|
||||
private $_xingHeader = null;
|
||||
|
||||
/** @var Zend_Media_Mpeg_Abs_LameHeader */
|
||||
private $_lameHeader = null;
|
||||
|
||||
/** @var Zend_Media_Mpeg_Abs_VbriHeader */
|
||||
private $_vbriHeader = null;
|
||||
|
||||
/** @var integer */
|
||||
private $_cumulativeBitrate = 0;
|
||||
|
||||
/** @var integer */
|
||||
private $_cumulativePlayDuration = 0;
|
||||
|
||||
/** @var integer */
|
||||
private $_estimatedBitrate = 0;
|
||||
|
||||
/** @var integer */
|
||||
private $_estimatedPlayDuration = 0;
|
||||
|
||||
/** @var integer */
|
||||
private $_lastFrameOffset = false;
|
||||
|
||||
/**
|
||||
* Constructs the Zend_Media_Mpeg_ABS class with given file and options.
|
||||
*
|
||||
* The following options are currently recognized:
|
||||
* o readmode -- Can be one of full or lazy and determines when the read
|
||||
* of frames and their data happens. When in full mode the data is read
|
||||
* automatically during the instantiation of the frame and all the
|
||||
* frames are read during the instantiation of this class. While this
|
||||
* allows faster validation and data fetching, it is unnecessary in
|
||||
* terms of determining just the play duration of the file. Defaults to
|
||||
* lazy.
|
||||
*
|
||||
* o estimatePrecision -- Only applicaple with lazy read mode to determine
|
||||
* the precision of play duration estimate. This precision is equal to
|
||||
* how many frames are read before fixing the average bitrate that is
|
||||
* used to calculate the play duration estimate of the whole file. Each
|
||||
* frame adds about 0.1-0.2ms to the processing of the file. Defaults to
|
||||
* 1000.
|
||||
*
|
||||
* When in lazy data reading mode it is first checked whether a VBR header
|
||||
* is found in a file. If so, the play duration is calculated based no its
|
||||
* data and no further frames are read from the file. If no VBR header is
|
||||
* found, frames up to estimatePrecision are read to calculate an average
|
||||
* bitrate.
|
||||
*
|
||||
* Hence, only zero or <var>estimatePrecision</var> number of frames are
|
||||
* read in lazy data reading mode. The rest of the frames are read
|
||||
* automatically when directly referenced, ie the data is read when it is
|
||||
* needed.
|
||||
*
|
||||
* @param string|resource|Zend_Io_Reader $filename The path to the file,
|
||||
* file descriptor of an opened file, or a {@link Zend_Io_Reader} instance.
|
||||
* @param Array $options The options array.
|
||||
*/
|
||||
public function __construct($filename, $options = array())
|
||||
{
|
||||
if ($filename instanceof Zend_Io_Reader) {
|
||||
$this->_reader = &$filename;
|
||||
} else {
|
||||
require_once 'Zend/Io/FileReader.php';
|
||||
try {
|
||||
$this->_reader = new Zend_Io_FileReader($filename);
|
||||
} catch (Zend_Io_Exception $e) {
|
||||
$this->_reader = null;
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception($e->getMessage());
|
||||
}
|
||||
}
|
||||
$this->setOptions($options);
|
||||
|
||||
$offset = $this->_reader->getOffset();
|
||||
$this->_bytes = $this->_reader->getSize();
|
||||
|
||||
/* Skip ID3v1 tag */
|
||||
$this->_reader->setOffset(-128);
|
||||
if ($this->_reader->read(3) == 'TAG') {
|
||||
$this->_bytes -= 128;
|
||||
}
|
||||
$this->_reader->setOffset($offset);
|
||||
|
||||
/* Skip ID3v2 tag */
|
||||
if ($this->_reader->readString8(3) == 'ID3') {
|
||||
require_once 'Zend/Media/Id3/Header.php';
|
||||
$header = new Zend_Media_Id3_Header($this->_reader);
|
||||
$this->_reader->skip
|
||||
($header->getSize() +
|
||||
($header->hasFlag(Zend_Media_Id3_Header::FOOTER) ? 10 : 0));
|
||||
} else {
|
||||
$this->_reader->setOffset($offset);
|
||||
}
|
||||
|
||||
/* Check for VBR headers */
|
||||
$offset = $this->_reader->getOffset();
|
||||
|
||||
$this->_frames[] = $firstFrame =
|
||||
new Zend_Media_Mpeg_Abs_Frame($this->_reader, $options);
|
||||
|
||||
$postoffset = $this->_reader->getOffset();
|
||||
|
||||
$this->_reader->setOffset
|
||||
($offset + 4 + self::$sidesizes
|
||||
[$firstFrame->getFrequencyType()][$firstFrame->getMode()]);
|
||||
if (($xing = $this->_reader->readString8(4)) == 'Xing' ||
|
||||
$xing == 'Info') {
|
||||
require_once 'Zend/Media/Mpeg/Abs/XingHeader.php';
|
||||
$this->_xingHeader =
|
||||
new Zend_Media_Mpeg_Abs_XingHeader($this->_reader, $options);
|
||||
if ($this->_reader->readString8(4) == 'LAME') {
|
||||
require_once 'Zend/Media/Mpeg/Abs/LameHeader.php';
|
||||
$this->_lameHeader =
|
||||
new Zend_Media_Mpeg_Abs_LameHeader
|
||||
($this->_reader, $options);
|
||||
}
|
||||
|
||||
// A header frame is not counted as an audio frame
|
||||
array_pop($this->_frames);
|
||||
}
|
||||
|
||||
$this->_reader->setOffset($offset + 4 + 32);
|
||||
if ($this->_reader->readString8(4) == 'VBRI') {
|
||||
require_once 'Zend/Media/Mpeg/Abs/VbriHeader.php';
|
||||
$this->_vbriHeader =
|
||||
new Zend_Media_Mpeg_Abs_VbriHeader($this->_reader, $options);
|
||||
|
||||
// A header frame is not counted as an audio frame
|
||||
array_pop($this->_frames);
|
||||
}
|
||||
|
||||
$this->_reader->setOffset($postoffset);
|
||||
|
||||
// Ensure we always have read at least one frame
|
||||
if (empty($this->_frames)) {
|
||||
$this->_readFrames(1);
|
||||
}
|
||||
|
||||
/* Read necessary frames */
|
||||
if ($this->getOption('readmode', 'lazy') == 'lazy') {
|
||||
if (($header = $this->_xingHeader) !== null ||
|
||||
($header = $this->_vbriHeader) !== null) {
|
||||
$this->_estimatedPlayDuration = $header->getFrames() *
|
||||
$firstFrame->getSamples() /
|
||||
$firstFrame->getSamplingFrequency();
|
||||
if ($this->_lameHeader !== null) {
|
||||
$this->_estimatedBitrate = $this->_lameHeader->getBitrate();
|
||||
if ($this->_estimatedBitrate == 255) {
|
||||
$this->_estimatedBitrate = round
|
||||
(($this->_lameHeader->getMusicLength()) /
|
||||
(($header->getFrames() *
|
||||
$firstFrame->getSamples()) /
|
||||
$firstFrame->getSamplingFrequency()) / 1000 * 8);
|
||||
}
|
||||
} else {
|
||||
$this->_estimatedBitrate = ($this->_bytes - $offset) /
|
||||
$this->_estimatedPlayDuration / 1000 * 8;
|
||||
}
|
||||
} else {
|
||||
$this->_readFrames($this->getOption('estimatePrecision', 1000));
|
||||
|
||||
$this->_estimatedBitrate =
|
||||
$this->_cumulativeBitrate / count($this->_frames);
|
||||
$this->_estimatedPlayDuration =
|
||||
($this->_bytes - $offset) /
|
||||
($this->_estimatedBitrate * 1000 / 8);
|
||||
}
|
||||
} else {
|
||||
$this->_readFrames();
|
||||
|
||||
$this->_estimatedBitrate =
|
||||
$this->_cumulativeBitrate / count($this->_frames);
|
||||
$this->_estimatedPlayDuration = $this->_cumulativePlayDuration;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns <var>true</var> if the audio bitstream contains the Xing VBR
|
||||
* header, or <var>false</var> otherwise.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function hasXingHeader()
|
||||
{
|
||||
return $this->_xingHeader === null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the Xing VBR header, or <var>null</var> if not found in the audio
|
||||
* bitstream.
|
||||
*
|
||||
* @return Zend_Media_Mpeg_Abs_XingHeader
|
||||
*/
|
||||
public function getXingHeader()
|
||||
{
|
||||
return $this->_xingHeader;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns <var>true</var> if the audio bitstream contains the LAME VBR
|
||||
* header, or <var>false</var> otherwise.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function hasLameHeader()
|
||||
{
|
||||
return $this->_lameHeader === null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the LAME VBR header, or <var>null</var> if not found in the audio
|
||||
* bitstream.
|
||||
*
|
||||
* @return Zend_Media_Mpeg_Abs_LameHeader
|
||||
*/
|
||||
public function getLameHeader()
|
||||
{
|
||||
return $this->_lameHeader;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns <var>true</var> if the audio bitstream contains the Fraunhofer IIS
|
||||
* VBR header, or <var>false</var> otherwise.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function hasVbriHeader()
|
||||
{
|
||||
return $this->_vbriHeader === null;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the Fraunhofer IIS VBR header, or <var>null</var> if not found in
|
||||
* the audio bitstream.
|
||||
*
|
||||
* @return Zend_Media_Mpeg_Abs_VbriHeader
|
||||
*/
|
||||
public function getVbriHeader()
|
||||
{
|
||||
return $this->_vbriHeader;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the bitrate estimate. This value is either fetched from one of the
|
||||
* headers or calculated based on the read frames.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getBitrateEstimate()
|
||||
{
|
||||
return $this->_estimatedBitrate;
|
||||
}
|
||||
|
||||
/**
|
||||
* For variable bitrate files this method returns the exact average bitrate of
|
||||
* the whole file.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getBitrate()
|
||||
{
|
||||
if ($this->getOption('readmode', 'lazy') == 'lazy') {
|
||||
$this->_readFrames();
|
||||
}
|
||||
return $this->_cumulativeBitrate / count($this->_frames);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the playtime estimate, in seconds.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLengthEstimate()
|
||||
{
|
||||
return $this->_estimatedPlayDuration;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the exact playtime in seconds. In lazy reading mode the frames
|
||||
* are read from the file the first time you call this method to get the
|
||||
* exact playtime of the file.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLength()
|
||||
{
|
||||
if ($this->getOption('readmode', 'lazy') == 'lazy') {
|
||||
$this->_readFrames();
|
||||
}
|
||||
return $this->_cumulativePlayDuration;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the playtime estimate as a string in the form of
|
||||
* [hours:]minutes:seconds.milliseconds.
|
||||
*
|
||||
* @param integer $seconds The playtime in seconds.
|
||||
* @return string
|
||||
*/
|
||||
public function getFormattedLengthEstimate()
|
||||
{
|
||||
return $this->formatTime($this->getLengthEstimate());
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the exact playtime given in seconds as a string in the form of
|
||||
* [hours:]minutes:seconds.milliseconds. In lazy reading mode the frames are
|
||||
* read from the file the first time you call this method to get the exact
|
||||
* playtime of the file.
|
||||
*
|
||||
* @param integer $seconds The playtime in seconds.
|
||||
* @return string
|
||||
*/
|
||||
public function getFormattedLength()
|
||||
{
|
||||
return $this->formatTime($this->getLength());
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns all the frames of the audio bitstream as an array. In lazy
|
||||
* reading mode the frames are read from the file the first time you call
|
||||
* this method.
|
||||
*
|
||||
* @return Array
|
||||
*/
|
||||
public function getFrames()
|
||||
{
|
||||
if ($this->getOption('readmode', 'lazy') == 'lazy') {
|
||||
$this->_readFrames();
|
||||
}
|
||||
return $this->_frames;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads frames up to given limit. If called subsequently the method
|
||||
* continues after the last frame read in the last call, again to read up
|
||||
* to the limit or just the rest of the frames.
|
||||
*
|
||||
* @param integer $limit The maximum number of frames read from the
|
||||
* bitstream
|
||||
*/
|
||||
private function _readFrames($limit = null)
|
||||
{
|
||||
if ($this->_lastFrameOffset !== false) {
|
||||
$this->_reader->setOffset($this->_lastFrameOffset);
|
||||
}
|
||||
|
||||
for ($i = 0; $this->_reader->getOffset() < $this->_bytes; $i++) {
|
||||
$options = $this->getOptions();
|
||||
$frame = new Zend_Media_Mpeg_Abs_Frame($this->_reader, $options);
|
||||
|
||||
$this->_cumulativePlayDuration +=
|
||||
(double)($frame->getLength() /
|
||||
($frame->getBitrate() * 1000 / 8));
|
||||
$this->_cumulativeBitrate += $frame->getBitrate();
|
||||
$this->_frames[] = $frame;
|
||||
|
||||
if ($limit === null) {
|
||||
$this->_lastFrameOffset = $this->_reader->getOffset();
|
||||
}
|
||||
if ($limit !== null && ($i + 1) == $limit) {
|
||||
$this->_lastFrameOffset = $this->_reader->getOffset();
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
550
src/Zend/Media/Mpeg/Abs/Frame.php
Normal file
550
src/Zend/Media/Mpeg/Abs/Frame.php
Normal file
@@ -0,0 +1,550 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Zend/Bit/Twiddling.php';
|
||||
require_once 'Zend/Media/Mpeg/Abs/Object.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* This class represents an MPEG Audio Bit Stream frame as described in
|
||||
* ISO/IEC 11172-3 and ISO/IEC 13818-3 standards.
|
||||
*
|
||||
* To accommodate fast header processing the error checking data and the audio
|
||||
* data are lazy fetch by default. You can change this behaviour by giving a
|
||||
* proper option to the {@link Zend_Media_Mpeg_Abs} class.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Ryan Butterfield <buttza@gmail.com>
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
final class Zend_Media_Mpeg_Abs_Frame extends Zend_Media_Mpeg_Abs_Object
|
||||
{
|
||||
/**
|
||||
* The bitrate lookup table. The table has the following format.
|
||||
*
|
||||
* <code>
|
||||
* array (
|
||||
* SAMPLING_FREQUENCY_HIGH | SAMPLING_FREQUENCY_LOW => array (
|
||||
* LAYER_ONE | LAYER_TWO | LAYER_TREE => array ( <bitrates> )
|
||||
* )
|
||||
* )
|
||||
* </code>
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
private static $bitrates = array (
|
||||
self::SAMPLING_FREQUENCY_HIGH => array (
|
||||
self::LAYER_ONE => array (
|
||||
1 => 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384,
|
||||
416, 448
|
||||
),
|
||||
self::LAYER_TWO => array (
|
||||
1 => 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,
|
||||
384
|
||||
),
|
||||
self::LAYER_THREE => array (
|
||||
1 => 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256,
|
||||
320
|
||||
)
|
||||
),
|
||||
self::SAMPLING_FREQUENCY_LOW => array (
|
||||
self::LAYER_ONE => array (
|
||||
1 => 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224,
|
||||
256
|
||||
),
|
||||
self::LAYER_TWO => array (
|
||||
1 => 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160
|
||||
),
|
||||
self::LAYER_THREE => array (
|
||||
1 => 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160
|
||||
)
|
||||
)
|
||||
);
|
||||
|
||||
/**
|
||||
* Sample rate lookup table. The table has the following format.
|
||||
*
|
||||
* <code>
|
||||
* array (
|
||||
* LAYER_ONE | LAYER_TWO | LAYER_TREE => array ( <sample rates> )
|
||||
* )
|
||||
* </code>
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
private static $samplingFrequencies = array (
|
||||
self::VERSION_ONE => array (44100, 48000, 32000),
|
||||
self::VERSION_TWO => array (22050, 24000, 16000),
|
||||
self::VERSION_TWO_FIVE => array (11025, 12000, 8000)
|
||||
);
|
||||
|
||||
/**
|
||||
* Samples per frame lookup table. The table has the following format.
|
||||
*
|
||||
* <code>
|
||||
* array (
|
||||
* SAMPLING_FREQUENCY_HIGH | SAMPLING_FREQUENCY_LOW => array (
|
||||
* LAYER_ONE | LAYER_TWO | LAYER_TREE => <sample count>
|
||||
* )
|
||||
* )
|
||||
* </code>
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
private static $samples = array (
|
||||
self::SAMPLING_FREQUENCY_HIGH => array (
|
||||
self::LAYER_ONE => 384,
|
||||
self::LAYER_TWO => 1152,
|
||||
self::LAYER_THREE => 1152),
|
||||
self::SAMPLING_FREQUENCY_LOW => array (
|
||||
self::LAYER_ONE => 384,
|
||||
self::LAYER_TWO => 1152,
|
||||
self::LAYER_THREE => 576));
|
||||
|
||||
/**
|
||||
* Coefficient lookup table. The table has the following format.
|
||||
*
|
||||
* <code>
|
||||
* array (
|
||||
* SAMPLING_FREQUENCY_HIGH | SAMPLING_FREQUENCY_LOW => array (
|
||||
* LAYER_ONE | LAYER_TWO | LAYER_TREE => array ( <coefficient> )
|
||||
* )
|
||||
* )
|
||||
* </code>
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
private static $coefficients = array (
|
||||
self::SAMPLING_FREQUENCY_HIGH => array (
|
||||
self::LAYER_ONE => 12, self::LAYER_TWO => 144,
|
||||
self::LAYER_THREE => 144
|
||||
),
|
||||
self::SAMPLING_FREQUENCY_LOW => array (
|
||||
self::LAYER_ONE => 12, self::LAYER_TWO => 144,
|
||||
self::LAYER_THREE => 72
|
||||
)
|
||||
);
|
||||
|
||||
/**
|
||||
* Slot size per layer lookup table. The table has the following format.
|
||||
*
|
||||
* <code>
|
||||
* array (
|
||||
* LAYER_ONE | LAYER_TWO | LAYER_TREE => <size>
|
||||
* )
|
||||
* </code>
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
private static $slotsizes = array (
|
||||
self::LAYER_ONE => 4, self::LAYER_TWO => 1, self::LAYER_THREE => 1
|
||||
);
|
||||
|
||||
/** @var integer */
|
||||
private $_offset;
|
||||
|
||||
/** @var integer */
|
||||
private $_version;
|
||||
|
||||
/** @var integer */
|
||||
private $_frequencyType;
|
||||
|
||||
/** @var integer */
|
||||
private $_layer;
|
||||
|
||||
/** @var integer */
|
||||
private $_redundancy;
|
||||
|
||||
/** @var integer */
|
||||
private $_bitrate;
|
||||
|
||||
/** @var integer */
|
||||
private $_samplingFrequency;
|
||||
|
||||
/** @var integer */
|
||||
private $_padding;
|
||||
|
||||
/** @var integer */
|
||||
private $_mode;
|
||||
|
||||
/** @var integer */
|
||||
private $_modeExtension;
|
||||
|
||||
/** @var integer */
|
||||
private $_copyright;
|
||||
|
||||
/** @var integer */
|
||||
private $_original;
|
||||
|
||||
/** @var integer */
|
||||
private $_emphasis;
|
||||
|
||||
/** @var integer */
|
||||
private $_length;
|
||||
|
||||
/** @var integer */
|
||||
private $_samples;
|
||||
|
||||
/** @var integer */
|
||||
private $_crc = false;
|
||||
|
||||
/** @var string */
|
||||
private $_data = false;
|
||||
|
||||
/**
|
||||
* Constructs the class with given parameters and reads object related data
|
||||
* from the frame.
|
||||
*
|
||||
* @param Zend_Io_Reader $reader The reader object.
|
||||
* @param Array $options Array of options.
|
||||
*/
|
||||
public function __construct($reader, &$options = array())
|
||||
{
|
||||
parent::__construct($reader, $options);
|
||||
|
||||
$this->_offset = $this->_reader->getOffset();
|
||||
|
||||
$header = $this->_reader->readUInt32BE();
|
||||
$this->_version = Zend_Bit_Twiddling::getValue($header, 19, 20);
|
||||
$this->_frequencyType = Zend_Bit_Twiddling::testBit($header, 19);
|
||||
$this->_layer = Zend_Bit_Twiddling::getValue($header, 17, 18);
|
||||
$this->_redundancy = !Zend_Bit_Twiddling::testBit($header, 16);
|
||||
$this->_bitrate = isset
|
||||
(self::$bitrates[$this->_frequencyType][$this->_layer]
|
||||
[$index = Zend_Bit_Twiddling::getValue($header, 12, 15)]) ?
|
||||
self::$bitrates[$this->_frequencyType][$this->_layer][$index] :
|
||||
false;
|
||||
$this->_samplingFrequency = isset
|
||||
(self::$samplingFrequencies[$this->_version]
|
||||
[$index = Zend_Bit_Twiddling::getValue($header, 10, 11)]) ?
|
||||
self::$samplingFrequencies[$this->_version][$index] : false;
|
||||
$this->_padding = Zend_Bit_Twiddling::testBit($header, 9);
|
||||
$this->_mode = Zend_Bit_Twiddling::getValue($header, 6, 7);
|
||||
$this->_modeExtension = Zend_Bit_Twiddling::getValue($header, 4, 5);
|
||||
$this->_copyright = Zend_Bit_Twiddling::testBit($header, 3);
|
||||
$this->_original = Zend_Bit_Twiddling::testBit($header, 2);
|
||||
$this->_emphasis = Zend_Bit_Twiddling::getValue($header, 0, 1);
|
||||
|
||||
$this->_length = (int)
|
||||
((self::$coefficients[$this->_frequencyType][$this->_layer] *
|
||||
($this->_bitrate * 1000) / $this->_samplingFrequency) +
|
||||
($this->_padding ? 1 : 0)) * self::$slotsizes[$this->_layer];
|
||||
$this->_samples = self::$samples[$this->_frequencyType][$this->_layer];
|
||||
|
||||
if ($this->getOption('readmode', 'lazy') == 'full') {
|
||||
$this->_readCrc();
|
||||
$this->_readData();
|
||||
}
|
||||
$this->_reader->skip($this->_length - 4);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the version identifier of the algorithm.
|
||||
*
|
||||
* @see VERSION_ONE, VERSION_TWO, VERSION_TWO_FIVE
|
||||
* @return integer
|
||||
*/
|
||||
public function getVersion()
|
||||
{
|
||||
return $this->_version;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the sampling frequency type. This can be one of the following
|
||||
* values.
|
||||
*
|
||||
* o <b>{@link SAMPLING_FREQUENCY_HIGH}</b> -- Higher Sampling Frequency
|
||||
* (Version 1)
|
||||
* o <b>{@link SAMPLING_FREQUENCY_LOW}</b> -- Lower Sampling Frequency
|
||||
* (Version 2 and 2.5)
|
||||
*
|
||||
* @see SAMPLING_FREQUENCY_LOW, SAMPLING_FREQUENCY_HIGH
|
||||
* @return integer
|
||||
*/
|
||||
public function getFrequencyType()
|
||||
{
|
||||
return $this->_frequencyType;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the type of layer used.
|
||||
*
|
||||
* @see LAYER_ONE, LAYER_TWO, LAYER_THREE
|
||||
* @return integer
|
||||
*/
|
||||
public function getLayer()
|
||||
{
|
||||
return $this->_layer;
|
||||
}
|
||||
|
||||
/**
|
||||
* An alias to getRedundancy().
|
||||
*
|
||||
* @see getRedundancy
|
||||
* @return boolean
|
||||
*/
|
||||
public function hasRedundancy()
|
||||
{
|
||||
return $this->getRedundancy();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns boolean corresponding to whether redundancy has been added in the
|
||||
* audio bitstream to facilitate error detection and concealment. Equals
|
||||
* <var>false</var> if no redundancy has been added, <var>true</var> if
|
||||
* redundancy has been added.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function getRedundancy()
|
||||
{
|
||||
return $this->_redundancy;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the bitrate in kbps. The returned value indicates the total bitrate
|
||||
* irrespective of the mode (stereo, joint_stereo, dual_channel,
|
||||
* single_channel).
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getBitrate()
|
||||
{
|
||||
return $this->_bitrate;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the sampling frequency in Hz.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getSamplingFrequency()
|
||||
{
|
||||
return $this->_samplingFrequency;
|
||||
}
|
||||
|
||||
/**
|
||||
* An alias to getPadding().
|
||||
*
|
||||
* @see getPadding
|
||||
* @return boolean
|
||||
*/
|
||||
public function hasPadding()
|
||||
{
|
||||
return $this->getPadding();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns boolean corresponding the frame contains an additional slot to
|
||||
* adjust the mean bitrate to the sampling frequency. Equals to
|
||||
* <var>true</var> if padding has been added, <var>false</var> otherwise.
|
||||
*
|
||||
* Padding is only necessary with a sampling frequency of 44.1kHz.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function getPadding()
|
||||
{
|
||||
return $this->_padding;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the mode. In Layer I and II the CHANNEL_JOINT_STEREO mode is
|
||||
* intensity_stereo, in Layer III it is intensity_stereo and/or ms_stereo.
|
||||
*
|
||||
* @see CHANNEL_STEREO, CHANNEL_JOINT_STEREO, CHANNEL_DUAL_CHANNEL,
|
||||
* CHANNEL_SINGLE_CHANNEL
|
||||
* @return integer
|
||||
*/
|
||||
public function getMode()
|
||||
{
|
||||
return $this->_mode;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the mode extension used in CHANNEL_JOINT_STEREO mode.
|
||||
*
|
||||
* In Layer I and II the return type indicates which subbands are in
|
||||
* intensity_stereo. All other subbands are coded in stereo.
|
||||
*
|
||||
* o <b>{@link MODE_SUBBAND_4_TO_31}</b> -- subbands 4-31 in
|
||||
* intensity_stereo, bound==4
|
||||
* o <b>{@link MODE_SUBBAND_8_TO_31}</b> -- subbands 8-31 in
|
||||
* intensity_stereo, bound==8
|
||||
* o <b>{@link MODE_SUBBAND_12_TO_31}</b> -- subbands 12-31 in
|
||||
* intensity_stereo, bound==12
|
||||
* o <b>{@link MODE_SUBBAND_16_TO_31}</b> -- subbands 16-31 in
|
||||
* intensity_stereo, bound==16
|
||||
*
|
||||
* In Layer III they indicate which type of joint stereo coding method is
|
||||
* applied. The frequency ranges over which the intensity_stereo and
|
||||
* ms_stereo modes are applied are implicit in the algorithm. Please see
|
||||
* {@link MODE_ISOFF_MSSOFF}, {@link MODE_ISON_MSSOFF},
|
||||
* {@link MODE_ISOFF_MSSON}, and {@link MODE_ISON_MSSON}.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getModeExtension()
|
||||
{
|
||||
return $this->_modeExtension;
|
||||
}
|
||||
|
||||
/**
|
||||
* An alias to getCopyright().
|
||||
*
|
||||
* @see getCopyright
|
||||
* @return boolean
|
||||
*/
|
||||
public function hasCopyright()
|
||||
{
|
||||
return $this->getCopyright();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns <var>true</var> if the coded bitstream is copyright protected,
|
||||
* <var>false</var> otherwise.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function getCopyright()
|
||||
{
|
||||
return $this->_copyright;
|
||||
}
|
||||
|
||||
/**
|
||||
* An alias to getOriginal().
|
||||
*
|
||||
* @see getOriginal
|
||||
* @return boolean
|
||||
*/
|
||||
public function isOriginal()
|
||||
{
|
||||
return $this->getOriginal();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns whether the bitstream is original or home made.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function getOriginal()
|
||||
{
|
||||
return $this->_original;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the type of de-emphasis that shall be used. The value is one of
|
||||
* the following.
|
||||
*
|
||||
* o <b>{@link EMPHASIS_NONE}</b> -- No emphasis
|
||||
* o <b>{@link EMPHASIS_50_15}</b> -- 50/15 microsec. emphasis
|
||||
* o <b>{@link EMPHASIS_CCIT_J17}</b> -- CCITT J.17
|
||||
*
|
||||
* @see EMPHASIS_NONE, EMPHASIS_50_15, EMPHASIS_CCIT_J17
|
||||
* @return integer
|
||||
*/
|
||||
public function getEmphasis()
|
||||
{
|
||||
return $this->_emphasis;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the length of the frame based on the current layer, bit rate,
|
||||
* sampling frequency and padding, in bytes.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLength()
|
||||
{
|
||||
return $this->_length;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of samples contained in the frame.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getSamples()
|
||||
{
|
||||
return $this->_samples;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the 16-bit CRC of the frame or <var>false</var> if not present.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getCrc()
|
||||
{
|
||||
if ($this->getOption('readmode', 'lazy') == 'lazy' &&
|
||||
$this->hasRedundancy() && $this->_crc === false) {
|
||||
$this->_readCrc();
|
||||
}
|
||||
return $this->_crc;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads the CRC data.
|
||||
*/
|
||||
private function _readCrc()
|
||||
{
|
||||
if ($this->hasRedundancy()) {
|
||||
$offset = $this->_reader->getOffset();
|
||||
$this->_reader->setOffset($this->_offset + 4);
|
||||
$this->_crc = $this->_reader->readUInt16BE();
|
||||
$this->_reader->setOffset($offset);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the audio data.
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
public function getData()
|
||||
{
|
||||
if ($this->getOption('readmode', 'lazy') == 'lazy' &&
|
||||
$this->_data === false) {
|
||||
$this->_readData();
|
||||
}
|
||||
return $this->_data;
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads the frame data.
|
||||
*/
|
||||
private function _readData()
|
||||
{
|
||||
$offset = $this->_reader->getOffset();
|
||||
$this->_reader->setOffset
|
||||
($this->_offset + 4 + ($this->hasRedundancy() ? 2 : 0));
|
||||
$this->_data = $this->_reader->read
|
||||
($this->getLength() - 4 - ($this->hasRedundancy() ? 2 : 0));
|
||||
$this->_reader->setOffset($offset);
|
||||
}
|
||||
}
|
||||
528
src/Zend/Media/Mpeg/Abs/LameHeader.php
Normal file
528
src/Zend/Media/Mpeg/Abs/LameHeader.php
Normal file
@@ -0,0 +1,528 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Zend/Io/Reader.php';
|
||||
require_once 'Zend/Bit/Twiddling.php';
|
||||
require_once 'Zend/Media/Mpeg/Abs/Object.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* This class represents a LAME extension to the Xing VBR header. The purpose of
|
||||
* this header is to provide extra information about the audio bistream, encoder
|
||||
* and parameters used. This header should, as much as possible, be meaningfull
|
||||
* for as many encoders as possible, even if it is unlikely that other encoders
|
||||
* than LAME will implement it.
|
||||
*
|
||||
|
||||
* This header should be backward compatible with the Xing VBR tag, providing
|
||||
* basic support for a lot of already written software. As much as possible the
|
||||
* current revision (revision 1) should provide information similar to the one
|
||||
* already provided by revision 0.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
class Zend_Media_Mpeg_Abs_LameHeader extends Zend_Media_Mpeg_Abs_Object
|
||||
{
|
||||
/** @var integer */
|
||||
const VBR_METHOD_CONSTANT = 1;
|
||||
|
||||
/** @var integer */
|
||||
const VBR_METHOD_ABR = 2;
|
||||
|
||||
/** @var integer */
|
||||
const VBR_METHOD_RH = 3;
|
||||
|
||||
/** @var integer */
|
||||
const VBR_METHOD_MTRH = 4;
|
||||
|
||||
/** @var integer */
|
||||
const VBR_METHOD_MT = 5;
|
||||
|
||||
/** @var integer */
|
||||
const ENCODING_FLAG_NSPSYTUNE = 1;
|
||||
|
||||
/** @var integer */
|
||||
const ENCODING_FLAG_NSSAFEJOINT = 2;
|
||||
|
||||
/** @var integer */
|
||||
const ENCODING_FLAG_NOGAP_CONTINUED = 4;
|
||||
|
||||
/** @var integer */
|
||||
const ENCODING_FLAG_NOGAP_CONTINUATION = 8;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_MONO = 0;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_STEREO = 1;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_DUAL = 2;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_JOINT = 3;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_FORCE = 4;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_AUTO = 5;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_INTENSITY = 6;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_UNDEFINED = 7;
|
||||
|
||||
/** @var integer */
|
||||
const SOURCE_FREQUENCY_32000_OR_LOWER = 0;
|
||||
|
||||
/** @var integer */
|
||||
const SOURCE_FREQUENCY_44100 = 1;
|
||||
|
||||
/** @var integer */
|
||||
const SOURCE_FREQUENCY_48000 = 2;
|
||||
|
||||
/** @var integer */
|
||||
const SOURCE_FREQUENCY_HIGHER = 3;
|
||||
|
||||
/** @var integer */
|
||||
const SURROUND_NONE = 0;
|
||||
|
||||
/** @var integer */
|
||||
const SURROUND_DPL = 1;
|
||||
|
||||
/** @var integer */
|
||||
const SURROUND_DPL2 = 2;
|
||||
|
||||
/** @var integer */
|
||||
const SURROUND_AMBISONIC = 3;
|
||||
|
||||
/** @var string */
|
||||
private $_version;
|
||||
|
||||
/** @var integer */
|
||||
private $_revision;
|
||||
|
||||
/** @var integer */
|
||||
private $_vbrMethod;
|
||||
|
||||
/** @var integer */
|
||||
private $_lowpass;
|
||||
|
||||
/** @var integer */
|
||||
private $_peakSignalAmplitude;
|
||||
|
||||
/** @var integer */
|
||||
private $_radioReplayGain;
|
||||
|
||||
/** @var integer */
|
||||
private $_audiophileReplayGain;
|
||||
|
||||
/** @var integer */
|
||||
private $_encodingFlags;
|
||||
|
||||
/** @var integer */
|
||||
private $_athType;
|
||||
|
||||
/** @var integer */
|
||||
private $_bitrate;
|
||||
|
||||
/** @var integer */
|
||||
private $_encoderDelaySamples;
|
||||
|
||||
/** @var integer */
|
||||
private $_paddedSamples;
|
||||
|
||||
/** @var integer */
|
||||
private $_sourceSampleFrequency;
|
||||
|
||||
/** @var boolean */
|
||||
private $_unwiseSettingsUsed;
|
||||
|
||||
/** @var integer */
|
||||
private $_mode;
|
||||
|
||||
/** @var integer */
|
||||
private $_noiseShaping;
|
||||
|
||||
/** @var integer */
|
||||
private $_mp3Gain;
|
||||
|
||||
/** @var integer */
|
||||
private $_surroundInfo;
|
||||
|
||||
/** @var integer */
|
||||
private $_presetUsed;
|
||||
|
||||
/** @var integer */
|
||||
private $_musicLength;
|
||||
|
||||
/** @var integer */
|
||||
private $_musicCrc;
|
||||
|
||||
/** @var integer */
|
||||
private $_crc;
|
||||
|
||||
/**
|
||||
* Constructs the class with given parameters and reads object related data
|
||||
* from the bitstream.
|
||||
*
|
||||
* @param Zend_Io_Reader $reader The reader object.
|
||||
* @param Array $options Array of options.
|
||||
*/
|
||||
public function __construct($reader, &$options = array())
|
||||
{
|
||||
parent::__construct($reader, $options);
|
||||
|
||||
$this->_version = $this->_reader->readString8(5);
|
||||
|
||||
$tmp = $this->_reader->readUInt8();
|
||||
$this->_revision = Zend_Bit_Twiddling::getValue($tmp, 4, 8);
|
||||
$this->_vbrMethod = Zend_Bit_Twiddling::getValue($tmp, 0, 3);
|
||||
|
||||
$this->_lowpass = $this->_reader->readUInt8() * 100;
|
||||
|
||||
$this->_peakSignalAmplitude = $this->_reader->readUInt32BE();
|
||||
|
||||
$tmp = $this->_reader->readUInt16BE();
|
||||
$this->_radioReplayGain = array(
|
||||
'name' => Zend_Bit_Twiddling::getValue($tmp, 0, 2),
|
||||
'originator' => Zend_Bit_Twiddling::getValue($tmp, 3, 5),
|
||||
'absoluteGainAdjustment' =>
|
||||
Zend_Bit_Twiddling::getValue($tmp, 7, 15) / 10
|
||||
);
|
||||
|
||||
$tmp = $this->_reader->readUInt16BE();
|
||||
$this->_audiophileReplayGain = array(
|
||||
'name' => Zend_Bit_Twiddling::getValue($tmp, 0, 2),
|
||||
'originator' => Zend_Bit_Twiddling::getValue($tmp, 3, 5),
|
||||
'absoluteGainAdjustment' =>
|
||||
Zend_Bit_Twiddling::getValue($tmp, 7, 15) / 10
|
||||
);
|
||||
|
||||
$tmp = $this->_reader->readUInt8();
|
||||
$this->_encodingFlags = Zend_Bit_Twiddling::getValue($tmp, 4, 8);
|
||||
$this->_athType = Zend_Bit_Twiddling::getValue($tmp, 0, 3);
|
||||
|
||||
$this->_bitrate = $this->_reader->readUInt8();
|
||||
|
||||
$tmp = $this->_reader->readUInt32BE();
|
||||
// Encoder delay fields
|
||||
$this->_encoderDelaySamples =
|
||||
Zend_Bit_Twiddling::getValue($tmp, 20, 31);
|
||||
$this->_paddedSamples = Zend_Bit_Twiddling::getValue($tmp, 8, 19);
|
||||
// Misc field
|
||||
$this->_sourceSampleFrequency =
|
||||
Zend_Bit_Twiddling::getValue($tmp, 6, 7);
|
||||
$this->_unwiseSettingsUsed = Zend_Bit_Twiddling::testBit($tmp, 5);
|
||||
$this->_mode = Zend_Bit_Twiddling::getValue($tmp, 2, 4);
|
||||
$this->_noiseShaping = Zend_Bit_Twiddling::getValue($tmp, 0, 1);
|
||||
|
||||
$this->_mp3Gain = pow(2, $this->_reader->readInt8() / 4);
|
||||
|
||||
$tmp = $this->_reader->readUInt16BE();
|
||||
$this->_surroundInfo = Zend_Bit_Twiddling::getValue($tmp, 11, 14);
|
||||
$this->_presetUsed = Zend_Bit_Twiddling::getValue($tmp, 0, 10);
|
||||
|
||||
$this->_musicLength = $this->_reader->readUInt32BE();
|
||||
|
||||
$this->_musicCrc = $this->_reader->readUInt16BE();
|
||||
$this->_crc = $this->_reader->readUInt16BE();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the version string of the header.
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
public function getVersion()
|
||||
{
|
||||
return $this->_version;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the info tag revision.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getRevision()
|
||||
{
|
||||
return $this->_revision;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the VBR method used for encoding. See the corresponding constants
|
||||
* for possible return values.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getVbrMethod()
|
||||
{
|
||||
return $this->_vbrMethod;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the lowpass filter value.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLowpass()
|
||||
{
|
||||
return $this->_lowpass;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the peak signal amplitude field of replay gain. The value of 1.0
|
||||
* (ie 100%) represents maximal signal amplitude storeable in decoding
|
||||
* format.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getPeakSignalAmplitude()
|
||||
{
|
||||
return $this->_peakSignalAmplitude;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the radio replay gain field of replay gain, required to make all
|
||||
* tracks equal loudness, as an array that consists of the following keys.
|
||||
*
|
||||
* o name -- Specifies the name of the gain adjustment. Can be one of the
|
||||
* following values: 0 = not set, 1 = radio, or 2 = audiophile.
|
||||
*
|
||||
* o originator -- Specifies the originator of the gain adjustment. Can be
|
||||
* one of the following values: 0 = not set, 1 = set by artist, 2 = set
|
||||
* by user, 3 = set by my model, 4 = set by simple RMS average.
|
||||
*
|
||||
* o absoluteGainAdjustment -- Speficies the absolute gain adjustment.
|
||||
*
|
||||
* @return Array
|
||||
*/
|
||||
public function getRadioReplayGain()
|
||||
{
|
||||
return $this->_radioReplayGain;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the audiophile replay gain field of replay gain, required to give
|
||||
* ideal listening loudness, as an array that consists of the following
|
||||
* keys.
|
||||
*
|
||||
* o name -- Specifies the name of the gain adjustment. Can be one of the
|
||||
* following values: 0 = not set, 1 = radio, or 2 = audiophile.
|
||||
*
|
||||
* o originator -- Specifies the originator of the gain adjustment. Can be
|
||||
* one of the following values: 0 = not set, 1 = set by artist, 2 = set
|
||||
* by user, 3 = set by my model, 4 = set by simple RMS average.
|
||||
*
|
||||
* o absoluteGainAdjustment -- Speficies the absolute gain adjustment.
|
||||
*
|
||||
* @return Array
|
||||
*/
|
||||
public function getAudiophileReplayGain()
|
||||
{
|
||||
return $this->_audiophileReplayGain;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the encoding flags. See the corresponding flag constants for
|
||||
* possible values.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getEncodingFlags()
|
||||
{
|
||||
return $this->_encodingFlags;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the ATH type.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getAthType()
|
||||
{
|
||||
return $this->_athType;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the bitrate for CBR encoded files and the minimal birate for
|
||||
* VBR encoded file. The maximum value of this field is 255 even with higher
|
||||
* actual bitrates.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getBitrate()
|
||||
{
|
||||
return $this->_bitrate;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the encoder delay or number of samples added at start.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getEncoderDelaySamples()
|
||||
{
|
||||
return $this->_encoderDelaySamples;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of padded samples to complete the last frame.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getPaddedSamples()
|
||||
{
|
||||
return $this->_paddedSamples;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the source sample frequency. See corresponding constants for
|
||||
* possible values.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getSourceSampleFrequency()
|
||||
{
|
||||
return $this->_sourceSampleFrequency;
|
||||
}
|
||||
|
||||
/**
|
||||
* An alias to getUnwiseSettingsUsed().
|
||||
*
|
||||
* @see getUnwiseSettingsUsed
|
||||
* @return boolean
|
||||
*/
|
||||
public function areUnwiseSettingsUsed()
|
||||
{
|
||||
return $this->getUnwiseSettingsUsed();
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns whether unwise settings were used to encode the file.
|
||||
*
|
||||
* @return boolean
|
||||
*/
|
||||
public function getUnwiseSettingsUsed()
|
||||
{
|
||||
return $this->_unwiseSettingsUsed;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the stereo mode. See corresponding constants for possible values.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getMode()
|
||||
{
|
||||
return $this->_mode;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the noise shaping.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getNoiseShaping()
|
||||
{
|
||||
return $this->_noiseShaping;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the MP3 gain change. Any MP3 can be amplified in a lossless
|
||||
* manner. If done so, this field can be used to log such transformation
|
||||
* happened so that any given time it can be undone.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getMp3Gain()
|
||||
{
|
||||
return $this->_mp3Gain;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the surround info. See corresponding contants for possible
|
||||
* values.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getSurroundInfo()
|
||||
{
|
||||
return $this->_surroundInfo;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the preset used in encoding.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getPresetUsed()
|
||||
{
|
||||
return $this->_presetUsed;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the exact length in bytes of the MP3 file originally made by LAME
|
||||
* excluded ID3 tag info at the end.
|
||||
*
|
||||
* The first byte it counts is the first byte of this LAME header and the
|
||||
* last byte it counts is the last byte of the last MP3 frame containing
|
||||
* music. The value should be equal to file length at the time of LAME
|
||||
* encoding, except when using ID3 tags.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getMusicLength()
|
||||
{
|
||||
return $this->_musicLength;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the CRC-16 of the complete MP3 music data as made originally by
|
||||
* LAME.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getMusicCrc()
|
||||
{
|
||||
return $this->_musicCrc;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the CRC-16 of the first 190 bytes of the header frame.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getCrc()
|
||||
{
|
||||
return $this->_crc;
|
||||
}
|
||||
}
|
||||
150
src/Zend/Media/Mpeg/Abs/Object.php
Normal file
150
src/Zend/Media/Mpeg/Abs/Object.php
Normal file
@@ -0,0 +1,150 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Zend/Media/Mpeg/Object.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* The base class for all MPEG Audio Bit Stream objects.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Ryan Butterfield <buttza@gmail.com>
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
abstract class Zend_Media_Mpeg_Abs_Object extends Zend_Media_Mpeg_Object
|
||||
{
|
||||
/** @var integer */
|
||||
const VERSION_ONE = 3;
|
||||
|
||||
/** @var integer */
|
||||
const VERSION_TWO = 2;
|
||||
|
||||
/** @var integer */
|
||||
const VERSION_TWO_FIVE = 0;
|
||||
|
||||
/** @var integer */
|
||||
const SAMPLING_FREQUENCY_LOW = 0;
|
||||
|
||||
/** @var integer */
|
||||
const SAMPLING_FREQUENCY_HIGH = 1;
|
||||
|
||||
/** @var integer */
|
||||
const LAYER_ONE = 3;
|
||||
|
||||
/** @var integer */
|
||||
const LAYER_TWO = 2;
|
||||
|
||||
/** @var integer */
|
||||
const LAYER_THREE = 1;
|
||||
|
||||
/** @var integer */
|
||||
const CHANNEL_STEREO = 0;
|
||||
|
||||
/** @var integer */
|
||||
const CHANNEL_JOINT_STEREO = 1;
|
||||
|
||||
/** @var integer */
|
||||
const CHANNEL_DUAL_CHANNEL = 2;
|
||||
|
||||
/** @var integer */
|
||||
const CHANNEL_SINGLE_CHANNEL = 3;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_SUBBAND_4_TO_31 = 0;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_SUBBAND_8_TO_31 = 1;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_SUBBAND_12_TO_31 = 2;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_SUBBAND_16_TO_31 = 3;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_ISOFF_MSSOFF = 0;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_ISON_MSSOFF = 1;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_ISOFF_MSSON = 2;
|
||||
|
||||
/** @var integer */
|
||||
const MODE_ISON_MSSON = 3;
|
||||
|
||||
/** @var integer */
|
||||
const EMPHASIS_NONE = 0;
|
||||
|
||||
/** @var integer */
|
||||
const EMPHASIS_50_15 = 1;
|
||||
|
||||
/** @var integer */
|
||||
const EMPHASIS_CCIT_J17 = 3;
|
||||
|
||||
/**
|
||||
* Layer III side information size lookup table. The table has the
|
||||
* following format.
|
||||
*
|
||||
* <code>
|
||||
* array (
|
||||
* SAMPLING_FREQUENCY_HIGH | SAMPLING_FREQUENCY_LOW => array (
|
||||
* CHANNEL_STEREO | CHANNEL_JOINT_STEREO | CHANNEL_DUAL_CHANNEL |
|
||||
* CHANNEL_SINGLE_CHANNEL => <size>
|
||||
* )
|
||||
* )
|
||||
* </code>
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
protected static $sidesizes = array(
|
||||
self::SAMPLING_FREQUENCY_HIGH => array(
|
||||
self::CHANNEL_STEREO => 32,
|
||||
self::CHANNEL_JOINT_STEREO => 32,
|
||||
self::CHANNEL_DUAL_CHANNEL => 32,
|
||||
self::CHANNEL_SINGLE_CHANNEL => 17
|
||||
),
|
||||
self::SAMPLING_FREQUENCY_LOW => array(
|
||||
self::CHANNEL_STEREO => 17,
|
||||
self::CHANNEL_JOINT_STEREO => 17,
|
||||
self::CHANNEL_DUAL_CHANNEL => 17,
|
||||
self::CHANNEL_SINGLE_CHANNEL => 9
|
||||
)
|
||||
);
|
||||
|
||||
/**
|
||||
* Constructs the class with given parameters.
|
||||
*
|
||||
* @param Zend_Io_Reader $reader The reader object.
|
||||
* @param Array $options The options array.
|
||||
*/
|
||||
public function __construct($reader, &$options = array())
|
||||
{
|
||||
parent::__construct($reader, $options);
|
||||
}
|
||||
}
|
||||
176
src/Zend/Media/Mpeg/Abs/VbriHeader.php
Normal file
176
src/Zend/Media/Mpeg/Abs/VbriHeader.php
Normal file
@@ -0,0 +1,176 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Reader.php';
|
||||
require_once 'Zend/Bit/Twiddling.php';
|
||||
require_once 'Zend/Media/Mpeg/Abs/Object.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* This class represents the Fraunhofer IIS VBR header which is often found in
|
||||
* the first frame of an MPEG Audio Bit Stream.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Ryan Butterfield <buttza@gmail.com>
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
class Zend_Media_Mpeg_Abs_VbriHeader extends Zend_Media_Mpeg_Abs_Object
|
||||
{
|
||||
/** @var integer */
|
||||
private $_version;
|
||||
|
||||
/** @var integer */
|
||||
private $_delay;
|
||||
|
||||
/** @var integer */
|
||||
private $_qualityIndicator;
|
||||
|
||||
/** @var integer */
|
||||
private $_bytes;
|
||||
|
||||
/** @var integer */
|
||||
private $_frames;
|
||||
|
||||
/** @var Array */
|
||||
private $_toc = array();
|
||||
|
||||
/** @var integer */
|
||||
private $_tocFramesPerEntry;
|
||||
|
||||
/** @var integer */
|
||||
private $_length;
|
||||
|
||||
/**
|
||||
* Constructs the class with given parameters and reads object related data
|
||||
* from the bitstream.
|
||||
*
|
||||
* @param Zend_Io_Reader $reader The reader object.
|
||||
* @param Array $options Array of options.
|
||||
*/
|
||||
public function __construct($reader, &$options = array())
|
||||
{
|
||||
$offset = $this->_reader->getOffset();
|
||||
$this->_version = $this->_reader->readUInt16BE();
|
||||
$this->_delay = $this->_reader->readUInt16BE();
|
||||
$this->_qualityIndicator = $this->_reader->readUInt16BE();
|
||||
$this->_bytes = $this->_reader->readUInt32BE();
|
||||
$this->_frames = $this->_reader->readUInt32BE();
|
||||
$tocEntries = $this->_reader->readUInt16BE();
|
||||
$tocEntryScale = $this->_reader->readUInt16BE();
|
||||
$tocEntrySize = $this->_reader->readUInt16BE();
|
||||
$this->_tocFramesPerEntry = $this->_reader->readUInt16BE();
|
||||
$this->_toc = array_merge(unpack(($tocEntrySize == 1) ? 'C*' :
|
||||
($tocEntrySize == 2) ? 'n*' : 'N*',
|
||||
$this->_reader->read($tocCount * $tocEntrySize)));
|
||||
foreach ($this->_toc as $key => $value) {
|
||||
$this->_toc[$key] = $tocEntryScale * $value;
|
||||
}
|
||||
$this->_length = $this->_reader->getOffset() - $offset;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the header version.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getVersion()
|
||||
{
|
||||
return $this->_version;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the delay.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getDelay()
|
||||
{
|
||||
return $this->_delay;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the quality indicator. Return value varies from 0 (best quality)
|
||||
* to 100 (worst quality).
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getQualityIndicator()
|
||||
{
|
||||
return $this->_qualityIndicator;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of bytes in the file.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getBytes()
|
||||
{
|
||||
return $this->_bytes;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of frames in the file.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getFrames()
|
||||
{
|
||||
return $this->_frames;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the table of contents array.
|
||||
*
|
||||
* @return Array
|
||||
*/
|
||||
public function getToc()
|
||||
{
|
||||
return $this->_toc;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of frames per TOC entry.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getTocFramesPerEntry()
|
||||
{
|
||||
return $this->_tocFramesPerEntry;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the length of the header in bytes.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLength()
|
||||
{
|
||||
return $this->_length;
|
||||
}
|
||||
}
|
||||
138
src/Zend/Media/Mpeg/Abs/XingHeader.php
Normal file
138
src/Zend/Media/Mpeg/Abs/XingHeader.php
Normal file
@@ -0,0 +1,138 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Reader.php';
|
||||
require_once 'Zend/Bit/Twiddling.php';
|
||||
require_once 'Zend/Media/Mpeg/Abs/Object.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* This class represents the Xing VBR header which is often found in the first
|
||||
* frame of an MPEG Audio Bit Stream.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Ryan Butterfield <buttza@gmail.com>
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
class Zend_Media_Mpeg_Abs_XingHeader extends Zend_Media_Mpeg_Abs_Object
|
||||
{
|
||||
/** @var integer */
|
||||
private $_frames = false;
|
||||
|
||||
/** @var integer */
|
||||
private $_bytes = false;
|
||||
|
||||
/** @var Array */
|
||||
private $_toc = array();
|
||||
|
||||
/** @var integer */
|
||||
private $_qualityIndicator = false;
|
||||
|
||||
/**
|
||||
* Constructs the class with given parameters and reads object related data
|
||||
* from the bitstream.
|
||||
*
|
||||
* @param Zend_Io_Reader $reader The reader object.
|
||||
* @param Array $options Array of options.
|
||||
*/
|
||||
public function __construct($reader, &$options = array())
|
||||
{
|
||||
parent::__construct($reader, $options);
|
||||
|
||||
$flags = $reader->readUInt32BE();
|
||||
|
||||
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x1)) {
|
||||
$this->_frames = $this->_reader->readUInt32BE();
|
||||
}
|
||||
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x2)) {
|
||||
$this->_bytes = $this->_reader->readUInt32BE();
|
||||
}
|
||||
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x4)) {
|
||||
$this->_toc = array_merge(unpack('C*', $this->_reader->read(100)));
|
||||
}
|
||||
if (Zend_Bit_Twiddling::testAnyBits($flags, 0x8)) {
|
||||
$this->_qualityIndicator = $this->_reader->readUInt32BE();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of frames in the file.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getFrames()
|
||||
{
|
||||
return $this->_frames;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the number of bytes in the file.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getBytes()
|
||||
{
|
||||
return $this->_bytes;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the table of contents array. The returned array has a fixed
|
||||
* amount of 100 seek points to the file.
|
||||
*
|
||||
* @return Array
|
||||
*/
|
||||
public function getToc()
|
||||
{
|
||||
return $this->_toc;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the quality indicator. The indicator is from 0 (best quality) to
|
||||
* 100 (worst quality).
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getQualityIndicator()
|
||||
{
|
||||
return $this->_qualityIndicator;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the length of the header in bytes.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLength()
|
||||
{
|
||||
return 4 +
|
||||
($this->_frames !== false ? 4 : 0) +
|
||||
($this->_bytes !== false ? 4 : 0) +
|
||||
(empty($this->_toc) ? 0 : 100) +
|
||||
($this->_qualityIndicator !== false ? 4 : 0);
|
||||
}
|
||||
}
|
||||
37
src/Zend/Media/Mpeg/Exception.php
Normal file
37
src/Zend/Media/Mpeg/Exception.php
Normal file
@@ -0,0 +1,37 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**
|
||||
* The Zend_Media_Mpeg_Exception is thrown whenever an error occurs within the
|
||||
* MPEG family of classes.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
class Zend_Media_Mpeg_Exception extends Exception
|
||||
{
|
||||
}
|
||||
267
src/Zend/Media/Mpeg/Object.php
Normal file
267
src/Zend/Media/Mpeg/Object.php
Normal file
@@ -0,0 +1,267 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Zend/Io/Reader.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* The base class for all MPEG objects.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
abstract class Zend_Media_Mpeg_Object
|
||||
{
|
||||
/**
|
||||
* The reader object.
|
||||
*
|
||||
* @var Reader
|
||||
*/
|
||||
protected $_reader;
|
||||
|
||||
/**
|
||||
* The options array.
|
||||
*
|
||||
* @var Array
|
||||
*/
|
||||
private $_options;
|
||||
|
||||
/**
|
||||
* Constructs the class with given parameters.
|
||||
*
|
||||
* @param Zend_Io_Reader $reader The reader object.
|
||||
* @param Array $options The options array.
|
||||
*/
|
||||
public function __construct($reader, &$options = array())
|
||||
{
|
||||
$this->_reader = $reader;
|
||||
$this->_options = &$options;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the options array.
|
||||
*
|
||||
* @return Array
|
||||
*/
|
||||
public final function &getOptions()
|
||||
{
|
||||
return $this->_options;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the given option value, or the default value if the option is not
|
||||
* defined.
|
||||
*
|
||||
* @param string $option The name of the option.
|
||||
* @param mixed $defaultValue The default value to be returned.
|
||||
*/
|
||||
public final function getOption($option, $defaultValue = null)
|
||||
{
|
||||
if (isset($this->_options[$option])) {
|
||||
return $this->_options[$option];
|
||||
}
|
||||
return $defaultValue;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the options array. See main class for available options.
|
||||
*
|
||||
* @param Array $options The options array.
|
||||
*/
|
||||
public final function setOptions(&$options)
|
||||
{
|
||||
$this->_options = &$options;
|
||||
}
|
||||
|
||||
/**
|
||||
* Sets the given option the given value.
|
||||
*
|
||||
* @param string $option The name of the option.
|
||||
* @param mixed $value The value to set for the option.
|
||||
*/
|
||||
public final function setOption($option, $value)
|
||||
{
|
||||
$this->_options[$option] = $value;
|
||||
}
|
||||
|
||||
/**
|
||||
* Clears the given option value.
|
||||
*
|
||||
* @param string $option The name of the option.
|
||||
*/
|
||||
public final function clearOption($option)
|
||||
{
|
||||
unset($this->_options[$option]);
|
||||
}
|
||||
|
||||
/**
|
||||
* Finds and returns the next start code. Start codes are reserved bit
|
||||
* patterns in the video file that do not otherwise occur in the video stream.
|
||||
*
|
||||
* All start codes are byte aligned and start with the following byte
|
||||
* sequence: 0x00 0x00 0x01.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
protected final function nextStartCode()
|
||||
{
|
||||
$buffer = ' ';
|
||||
for ($i = 0; $i < 4; $i++) {
|
||||
$start = $this->_reader->getOffset();
|
||||
if (($buffer = substr($buffer, -4) .
|
||||
$this->_reader->read(512)) === false) {
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception('Invalid data');
|
||||
}
|
||||
$limit = strlen($buffer);
|
||||
$pos = 0;
|
||||
while ($pos < $limit - 3) {
|
||||
if (ord($buffer{$pos++}) == 0) {
|
||||
list(, $int) = unpack('n*', substr($buffer, $pos, 2));
|
||||
if ($int == 1) {
|
||||
if (($pos += 2) < $limit - 2) {
|
||||
list(, $int) =
|
||||
unpack('n*', substr($buffer, $pos, 2));
|
||||
if ($int == 0 && ord($buffer{$pos + 2}) == 1) {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
$this->_reader->setOffset($start + $pos - 3);
|
||||
return ord($buffer{$pos++}) & 0xff | 0x100;
|
||||
}
|
||||
}
|
||||
}
|
||||
$this->_reader->setOffset($start + $limit);
|
||||
}
|
||||
|
||||
/* No start code found within 2048 bytes, the maximum size of a pack */
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception('Invalid data');
|
||||
}
|
||||
|
||||
/**
|
||||
* Finds and returns the previous start code. Start codes are reserved bit
|
||||
* patterns in the video file that do not otherwise occur in the video
|
||||
* stream.
|
||||
*
|
||||
* All start codes are byte aligned and start with the following byte
|
||||
* sequence: 0x00 0x00 0x01.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
protected final function prevStartCode()
|
||||
{
|
||||
$buffer = ' ';
|
||||
$start;
|
||||
$position = $this->_reader->getOffset();
|
||||
while ($position > 0) {
|
||||
$start = 0;
|
||||
$position = $position - 512;
|
||||
if ($position < 0) {
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception('Invalid data');
|
||||
}
|
||||
$this->_reader->setOffset($position);
|
||||
$buffer = $this->_reader->read(512) . substr($buffer, 0, 4);
|
||||
$pos = 512 - 8;
|
||||
while ($pos > 3) {
|
||||
list(, $int) = unpack('n*', substr($buffer, $pos + 1, 2));
|
||||
if (ord($buffer{$pos}) == 0 && $int == 1) {
|
||||
list(, $int) = unpack('n*', substr($buffer, $pos + 3, 2));
|
||||
if ($pos + 2 < 512 && $int == 0 &&
|
||||
ord($buffer{$pos + 5}) == 1) {
|
||||
$pos--;
|
||||
continue;
|
||||
}
|
||||
$this->_reader->setOffset($position + $pos);
|
||||
return ord($buffer{$pos + 3}) & 0xff | 0x100;
|
||||
}
|
||||
$pos--;
|
||||
}
|
||||
$this->_reader->setOffset($position = $position + 3);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Formats given time in seconds into the form of
|
||||
* [hours:]minutes:seconds.milliseconds.
|
||||
*
|
||||
* @param integer $seconds The time to format, in seconds
|
||||
* @return string
|
||||
*/
|
||||
protected final function formatTime($seconds)
|
||||
{
|
||||
$milliseconds = round(($seconds - floor($seconds)) * 1000);
|
||||
$seconds = floor($seconds);
|
||||
$minutes = floor($seconds / 60);
|
||||
$hours = floor($minutes / 60);
|
||||
return
|
||||
($minutes > 0 ?
|
||||
($hours > 0 ? $hours . ':' .
|
||||
str_pad($minutes % 60, 2, '0', STR_PAD_LEFT) : $minutes % 60) .
|
||||
':' .
|
||||
str_pad($seconds % 60, 2, '0', STR_PAD_LEFT) : $seconds % 60) .
|
||||
'.' .
|
||||
str_pad($milliseconds, 3, '0', STR_PAD_LEFT);
|
||||
}
|
||||
|
||||
/**
|
||||
* Magic function so that $obj->value will work.
|
||||
*
|
||||
* @param string $name The field name.
|
||||
* @return mixed
|
||||
*/
|
||||
public function __get($name)
|
||||
{
|
||||
if (method_exists($this, 'get' . ucfirst($name))) {
|
||||
return call_user_func(array($this, 'get' . ucfirst($name)));
|
||||
} else {
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception('Unknown field: ' . $name);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Magic function so that assignments with $obj->value will work.
|
||||
*
|
||||
* @param string $name The field name.
|
||||
* @param string $value The field value.
|
||||
* @return mixed
|
||||
*/
|
||||
public function __set($name, $value)
|
||||
{
|
||||
if (method_exists($this, 'set' . ucfirst($name))) {
|
||||
call_user_func
|
||||
(array($this, 'set' . ucfirst($name)), $value);
|
||||
} else {
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception('Unknown field: ' . $name);
|
||||
}
|
||||
}
|
||||
}
|
||||
152
src/Zend/Media/Mpeg/Ps.php
Normal file
152
src/Zend/Media/Mpeg/Ps.php
Normal file
@@ -0,0 +1,152 @@
|
||||
<?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 MPEG
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
*/
|
||||
|
||||
/**#@+ @ignore */
|
||||
require_once 'Zend/Bit/Twiddling.php';
|
||||
require_once 'Zend/Media/Mpeg/Object.php';
|
||||
/**#@-*/
|
||||
|
||||
/**
|
||||
* This class represents a MPEG Program Stream encoded file as described in
|
||||
* MPEG-1 Systems (ISO/IEC 11172-1) and MPEG-2 Systems (ISO/IEC 13818-1)
|
||||
* standards.
|
||||
*
|
||||
* The Program Stream is a stream definition which is tailored for communicating
|
||||
* or storing one program of coded data and other data in environments where
|
||||
* errors are very unlikely, and where processing of system coding, e.g. by
|
||||
* software, is a major consideration.
|
||||
*
|
||||
* This class only supports the parsing of the play duration.
|
||||
*
|
||||
* @category Zend
|
||||
* @package Zend_Media
|
||||
* @subpackage MPEG
|
||||
* @author Sven Vollbehr <sven@vollbehr.eu>
|
||||
* @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
|
||||
* @license http://framework.zend.com/license/new-bsd New BSD License
|
||||
* @version $Id$
|
||||
* @todo Full implementation
|
||||
*/
|
||||
final class Zend_Media_Mpeg_Ps extends Zend_Media_Mpeg_Object
|
||||
{
|
||||
/** @var integer */
|
||||
private $_length;
|
||||
|
||||
/**
|
||||
* Constructs the class with given file and options.
|
||||
*
|
||||
* @param string|resource|Zend_Io_Reader $filename The path to the file,
|
||||
* file descriptor of an opened file, or a {@link Zend_Io_Reader} instance.
|
||||
* @param Array $options The options array.
|
||||
*/
|
||||
public function __construct($filename, $options = array())
|
||||
{
|
||||
if ($filename instanceof Zend_Io_Reader) {
|
||||
$this->_reader = &$filename;
|
||||
} else {
|
||||
require_once 'Zend/Io/FileReader.php';
|
||||
try {
|
||||
$this->_reader = new Zend_Io_FileReader($filename);
|
||||
} catch (Zend_Io_Exception $e) {
|
||||
$this->_reader = null;
|
||||
require_once 'Zend/Media/Mpeg/Exception.php';
|
||||
throw new Zend_Media_Mpeg_Exception($e->getMessage());
|
||||
}
|
||||
}
|
||||
$this->setOptions($options);
|
||||
|
||||
$startCode = 0;
|
||||
$startTime = 0;
|
||||
$pictureCount = 0;
|
||||
$pictureRate = 0;
|
||||
$rates = array ( 0, 23.976, 24, 25, 29.97, 30, 50, 59.94, 60 );
|
||||
$foundSeqHdr = false;
|
||||
$foundGOP = false;
|
||||
|
||||
do {
|
||||
do {
|
||||
$startCode = $this->nextStartCode();
|
||||
echo "STARTCODE: $startCode\n";
|
||||
} while ($startCode != 0x1b3 && $startCode != 0x1b8);
|
||||
|
||||
if ($startCode == 0x1b3 /* sequence_header_code */ &&
|
||||
$pictureRate == 0) {
|
||||
$i1 = $this->_reader->readUInt32BE();
|
||||
$i2 = $this->_reader->readUInt32BE();
|
||||
if (!Zend_Bit_Twiddling::testAllBits($i2, 0x2000)) {
|
||||
throw new RuntimeException('Invalid mark');
|
||||
}
|
||||
$pictureRate = $rates[Zend_Bit_Twiddling::getValue($i1, 4, 8)];
|
||||
$foundSeqHdr = true;
|
||||
}
|
||||
if ($startCode == 0x1b8 /* group_start_code */) {
|
||||
$tmp = $this->_reader->readUInt32BE();
|
||||
$startTime =
|
||||
(($tmp >> 26) & 0x1f) * 60 * 60 * 1000 /* hours */ +
|
||||
(($tmp >> 20) & 0x3f) * 60 * 1000 /* minutes */ +
|
||||
(($tmp >> 13) & 0x3f) * 1000 /* seconds */ +
|
||||
(int)(1 / $pictureRate * (($tmp >> 7) & 0x3f) * 1000);
|
||||
$foundGOP = true;
|
||||
}
|
||||
} while (!$foundSeqHdr || !$foundGOP);
|
||||
|
||||
$this->_reader->setOffset($this->_reader->getSize());
|
||||
|
||||
do {
|
||||
if (($startCode = $this->prevStartCode()) == 0x100) {
|
||||
$pictureCount++;
|
||||
}
|
||||
} while ($startCode != 0x1b8);
|
||||
|
||||
$this->_reader->skip(4);
|
||||
$tmp = $this->_reader->readUInt32BE();
|
||||
$this->_length =
|
||||
(((($tmp >> 26) & 0x1f) * 60 * 60 * 1000 /* hours */ +
|
||||
(($tmp >> 20) & 0x3f) * 60 * 1000 /* minutes */ +
|
||||
(($tmp >> 13) & 0x3f) * 1000 /* seconds */ +
|
||||
(int)(1 / $pictureRate * (($tmp >> 7) & 0x3f) * 1000)) -
|
||||
$startTime +
|
||||
(int)(1 / $pictureRate * $pictureCount * 1000)) / 1000;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the exact playtime in seconds.
|
||||
*
|
||||
* @return integer
|
||||
*/
|
||||
public function getLength()
|
||||
{
|
||||
return $this->_length;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the exact playtime given in seconds as a string in the form of
|
||||
* [hours:]minutes:seconds.milliseconds.
|
||||
*
|
||||
* @param integer $seconds The playtime in seconds.
|
||||
* @return string
|
||||
*/
|
||||
public function getFormattedLength()
|
||||
{
|
||||
return $this->formatTime($this->getLength());
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user