Просмотр файла system/inc/library/class_mp3/class_mp3.php

<?
/**
 * PEAR, the PHP Extension and Application Repository
 *
 * PEAR class and PEAR_Error class
 *
 * PHP versions 4 and 5
 *
 * @category   pear
 * @package    PEAR
 * @author     Sterling Hughes <sterling@php.net>
 * @author     Stig Bakken <ssb@php.net>
 * @Authors:   Sandy McArthur Jr. <Leknor@Leknor.com>    
 * @author     Tomas V.V.Cox <cox@idecnet.com>
 * @author     Greg Beaver <cellog@php.net>
 * @copyright  1997-2010 The Authors
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @version    CVS: $Id: PEAR.php 313023 2011-07-06 19:17:11Z dufuz $
 * @link       http://pear.php.net/package/PEAR
 * @since      File available since Release 0.1
 */
 
/**#@+
 * ERROR constants
 */
define('PEAR_ERROR_RETURN',     1);
define('PEAR_ERROR_PRINT',      2);
define('PEAR_ERROR_TRIGGER',    4);
define('PEAR_ERROR_DIE',        8);
define('PEAR_ERROR_CALLBACK',  16);
/**
 * WARNING: obsolete
 * @deprecated
 */
define('PEAR_ERROR_EXCEPTION', 32);
/**#@-*/
define('PEAR_ZE2', (function_exists('version_compare') &&
                    version_compare(zend_version(), "2-dev", "ge")));
 
if (substr(PHP_OS, 0, 3) == 'WIN') {
    define('OS_WINDOWS', true);
    define('OS_UNIX',    false);
    define('PEAR_OS',    'Windows');
} else {
    define('OS_WINDOWS', false);
    define('OS_UNIX',    true);
    define('PEAR_OS',    'Unix'); // blatant assumption
}
 
$GLOBALS['_PEAR_default_error_mode']     = PEAR_ERROR_RETURN;
$GLOBALS['_PEAR_default_error_options']  = E_USER_NOTICE;
$GLOBALS['_PEAR_destructor_object_list'] = array();
$GLOBALS['_PEAR_shutdown_funcs']         = array();
$GLOBALS['_PEAR_error_handler_stack']    = array();
 
@ini_set('track_errors', true);
 
/**
 * Base class for other PEAR classes.  Provides rudimentary
 * emulation of destructors.
 *
 * If you want a destructor in your class, inherit PEAR and make a
 * destructor method called _yourclassname (same name as the
 * constructor, but with a "_" prefix).  Also, in your constructor you
 * have to call the PEAR constructor: $this->PEAR();.
 * The destructor method will be called without parameters.  Note that
 * at in some SAPI implementations (such as Apache), any output during
 * the request shutdown (in which destructors are called) seems to be
 * discarded.  If you need to get any debug information from your
 * destructor, use error_log(), syslog() or something similar.
 *
 * IMPORTANT! To use the emulated destructors you need to create the
 * objects by reference: $obj =& new PEAR_child;
 *
 * @category   pear
 * @package    PEAR
 * @author     Stig Bakken <ssb@php.net>
 * @author     Tomas V.V. Cox <cox@idecnet.com>
 * @author     Greg Beaver <cellog@php.net>
 * @copyright  1997-2006 The PHP Group
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @version    Release: 1.9.4
 * @link       http://pear.php.net/package/PEAR
 * @see        PEAR_Error
 * @since      Class available since PHP 4.0.2
 * @link        http://pear.php.net/manual/en/core.pear.php#core.pear.pear
 */
class PEAR
{
    /**
     * Whether to enable internal debug messages.
     *
     * @var     bool
     * @access  private
     */
    var $_debug = false;
 
    /**
     * Default error mode for this object.
     *
     * @var     int
     * @access  private
     */
    var $_default_error_mode = null;
 
    /**
     * Default error options used for this object when error mode
     * is PEAR_ERROR_TRIGGER.
     *
     * @var     int
     * @access  private
     */
    var $_default_error_options = null;
 
    /**
     * Default error handler (callback) for this object, if error mode is
     * PEAR_ERROR_CALLBACK.
     *
     * @var     string
     * @access  private
     */
    var $_default_error_handler = '';
 
    /**
     * Which class to use for error objects.
     *
     * @var     string
     * @access  private
     */
    var $_error_class = 'PEAR_Error';
 
    /**
     * An array of expected errors.
     *
     * @var     array
     * @access  private
     */
    var $_expected_errors = array();
 
    /**
     * Constructor.  Registers this object in
     * $_PEAR_destructor_object_list for destructor emulation if a
     * destructor object exists.
     *
     * @param string $error_class  (optional) which class to use for
     *        error objects, defaults to PEAR_Error.
     * @access public
     * @return void
     */
    function PEAR($error_class = null)
    {
        $classname = strtolower(get_class($this));
        if ($this->_debug) {
            print "PEAR constructor called, class=$classname\n";
        }
 
        if ($error_class !== null) {
            $this->_error_class = $error_class;
        }
 
        while ($classname && strcasecmp($classname, "pear")) {
            $destructor = "_$classname";
            if (method_exists($this, $destructor)) {
                global $_PEAR_destructor_object_list;
                $_PEAR_destructor_object_list[] = &$this;
                if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) {
                    register_shutdown_function("_PEAR_call_destructors");
                    $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true;
                }
                break;
            } else {
                $classname = get_parent_class($classname);
            }
        }
    }
 
    /**
     * Destructor (the emulated type of...).  Does nothing right now,
     * but is included for forward compatibility, so subclass
     * destructors should always call it.
     *
     * See the note in the class desciption about output from
     * destructors.
     *
     * @access public
     * @return void
     */
    function _PEAR() {
        if ($this->_debug) {
            printf("PEAR destructor called, class=%s\n", strtolower(get_class($this)));
        }
    }
 
    /**
    * If you have a class that's mostly/entirely static, and you need static
    * properties, you can use this method to simulate them. Eg. in your method(s)
    * do this: $myVar = &PEAR::getStaticProperty('myclass', 'myVar');
    * You MUST use a reference, or they will not persist!
    *
    * @access public
    * @param  string $class  The calling classname, to prevent clashes
    * @param  string $var    The variable to retrieve.
    * @return mixed   A reference to the variable. If not set it will be
    *                 auto initialised to NULL.
    */
    function &getStaticProperty($class, $var)
    {
        static $properties;
        if (!isset($properties[$class])) {
            $properties[$class] = array();
        }
 
        if (!array_key_exists($var, $properties[$class])) {
            $properties[$class][$var] = null;
        }
 
        return $properties[$class][$var];
    }
 
    /**
    * Use this function to register a shutdown method for static
    * classes.
    *
    * @access public
    * @param  mixed $func  The function name (or array of class/method) to call
    * @param  mixed $args  The arguments to pass to the function
    * @return void
    */
    function registerShutdownFunc($func, $args = array())
    {
        // if we are called statically, there is a potential
        // that no shutdown func is registered.  Bug #6445
        if (!isset($GLOBALS['_PEAR_SHUTDOWN_REGISTERED'])) {
            register_shutdown_function("_PEAR_call_destructors");
            $GLOBALS['_PEAR_SHUTDOWN_REGISTERED'] = true;
        }
        $GLOBALS['_PEAR_shutdown_funcs'][] = array($func, $args);
    }
 
    /**
     * Tell whether a value is a PEAR error.
     *
     * @param   mixed $data   the value to test
     * @param   int   $code   if $data is an error object, return true
     *                        only if $code is a string and
     *                        $obj->getMessage() == $code or
     *                        $code is an integer and $obj->getCode() == $code
     * @access  public
     * @return  bool    true if parameter is an error
     */
    function isError($data, $code = null)
    {
        if (!is_a($data, 'PEAR_Error')) {
            return false;
        }
 
        if (is_null($code)) {
            return true;
        } elseif (is_string($code)) {
            return $data->getMessage() == $code;
        }
 
        return $data->getCode() == $code;
    }
 
    /**
     * Sets how errors generated by this object should be handled.
     * Can be invoked both in objects and statically.  If called
     * statically, setErrorHandling sets the default behaviour for all
     * PEAR objects.  If called in an object, setErrorHandling sets
     * the default behaviour for that object.
     *
     * @param int $mode
     *        One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
     *        PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
     *        PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION.
     *
     * @param mixed $options
     *        When $mode is PEAR_ERROR_TRIGGER, this is the error level (one
     *        of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
     *
     *        When $mode is PEAR_ERROR_CALLBACK, this parameter is expected
     *        to be the callback function or method.  A callback
     *        function is a string with the name of the function, a
     *        callback method is an array of two elements: the element
     *        at index 0 is the object, and the element at index 1 is
     *        the name of the method to call in the object.
     *
     *        When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is
     *        a printf format string used when printing the error
     *        message.
     *
     * @access public
     * @return void
     * @see PEAR_ERROR_RETURN
     * @see PEAR_ERROR_PRINT
     * @see PEAR_ERROR_TRIGGER
     * @see PEAR_ERROR_DIE
     * @see PEAR_ERROR_CALLBACK
     * @see PEAR_ERROR_EXCEPTION
     *
     * @since PHP 4.0.5
     */
    function setErrorHandling($mode = null, $options = null)
    {
        if (isset($this) && is_a($this, 'PEAR')) {
            $setmode     = &$this->_default_error_mode;
            $setoptions  = &$this->_default_error_options;
        } else {
            $setmode     = &$GLOBALS['_PEAR_default_error_mode'];
            $setoptions  = &$GLOBALS['_PEAR_default_error_options'];
        }
 
        switch ($mode) {
            case PEAR_ERROR_EXCEPTION:
            case PEAR_ERROR_RETURN:
            case PEAR_ERROR_PRINT:
            case PEAR_ERROR_TRIGGER:
            case PEAR_ERROR_DIE:
            case null:
                $setmode = $mode;
                $setoptions = $options;
                break;
 
            case PEAR_ERROR_CALLBACK:
                $setmode = $mode;
                // class/object method callback
                if (is_callable($options)) {
                    $setoptions = $options;
                } else {
                    trigger_error("invalid error callback", E_USER_WARNING);
                }
                break;
 
            default:
                trigger_error("invalid error mode", E_USER_WARNING);
                break;
        }
    }
 
    /**
     * This method is used to tell which errors you expect to get.
     * Expected errors are always returned with error mode
     * PEAR_ERROR_RETURN.  Expected error codes are stored in a stack,
     * and this method pushes a new element onto it.  The list of
     * expected errors are in effect until they are popped off the
     * stack with the popExpect() method.
     *
     * Note that this method can not be called statically
     *
     * @param mixed $code a single error code or an array of error codes to expect
     *
     * @return int     the new depth of the "expected errors" stack
     * @access public
     */
    function expectError($code = '*')
    {
        if (is_array($code)) {
            array_push($this->_expected_errors, $code);
        } else {
            array_push($this->_expected_errors, array($code));
        }
        return count($this->_expected_errors);
    }
 
    /**
     * This method pops one element off the expected error codes
     * stack.
     *
     * @return array   the list of error codes that were popped
     */
    function popExpect()
    {
        return array_pop($this->_expected_errors);
    }
 
    /**
     * This method checks unsets an error code if available
     *
     * @param mixed error code
     * @return bool true if the error code was unset, false otherwise
     * @access private
     * @since PHP 4.3.0
     */
    function _checkDelExpect($error_code)
    {
        $deleted = false;
        foreach ($this->_expected_errors as $key => $error_array) {
            if (in_array($error_code, $error_array)) {
                unset($this->_expected_errors[$key][array_search($error_code, $error_array)]);
                $deleted = true;
            }
 
            // clean up empty arrays
            if (0 == count($this->_expected_errors[$key])) {
                unset($this->_expected_errors[$key]);
            }
        }
 
        return $deleted;
    }
 
    /**
     * This method deletes all occurences of the specified element from
     * the expected error codes stack.
     *
     * @param  mixed $error_code error code that should be deleted
     * @return mixed list of error codes that were deleted or error
     * @access public
     * @since PHP 4.3.0
     */
    function delExpect($error_code)
    {
        $deleted = false;
        if ((is_array($error_code) && (0 != count($error_code)))) {
            // $error_code is a non-empty array here; we walk through it trying
            // to unset all values
            foreach ($error_code as $key => $error) {
                $deleted =  $this->_checkDelExpect($error) ? true : false;
            }
 
            return $deleted ? true : PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME
        } elseif (!empty($error_code)) {
            // $error_code comes alone, trying to unset it
            if ($this->_checkDelExpect($error_code)) {
                return true;
            }
 
            return PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME
        }
 
        // $error_code is empty
        return PEAR::raiseError("The expected error you submitted is empty"); // IMPROVE ME
    }
 
    /**
     * This method is a wrapper that returns an instance of the
     * configured error class with this object's default error
     * handling applied.  If the $mode and $options parameters are not
     * specified, the object's defaults are used.
     *
     * @param mixed $message a text error message or a PEAR error object
     *
     * @param int $code      a numeric error code (it is up to your class
     *                  to define these if you want to use codes)
     *
     * @param int $mode      One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT,
     *                  PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE,
     *                  PEAR_ERROR_CALLBACK, PEAR_ERROR_EXCEPTION.
     *
     * @param mixed $options If $mode is PEAR_ERROR_TRIGGER, this parameter
     *                  specifies the PHP-internal error level (one of
     *                  E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR).
     *                  If $mode is PEAR_ERROR_CALLBACK, this
     *                  parameter specifies the callback function or
     *                  method.  In other error modes this parameter
     *                  is ignored.
     *
     * @param string $userinfo If you need to pass along for example debug
     *                  information, this parameter is meant for that.
     *
     * @param string $error_class The returned error object will be
     *                  instantiated from this class, if specified.
     *
     * @param bool $skipmsg If true, raiseError will only pass error codes,
     *                  the error message parameter will be dropped.
     *
     * @access public
     * @return object   a PEAR error object
     * @see PEAR::setErrorHandling
     * @since PHP 4.0.5
     */
    function &raiseError($message = null,
                         $code = null,
                         $mode = null,
                         $options = null,
                         $userinfo = null,
                         $error_class = null,
                         $skipmsg = false)
    {
        // The error is yet a PEAR error object
        if (is_object($message)) {
            $code        = $message->getCode();
            $userinfo    = $message->getUserInfo();
            $error_class = $message->getType();
            $message->error_message_prefix = '';
            $message     = $message->getMessage();
        }
 
        if (
            isset($this) &&
            isset($this->_expected_errors) &&
            count($this->_expected_errors) > 0 &&
            count($exp = end($this->_expected_errors))
        ) {
            if ($exp[0] == "*" ||
                (is_int(reset($exp)) && in_array($code, $exp)) ||
                (is_string(reset($exp)) && in_array($message, $exp))
            ) {
                $mode = PEAR_ERROR_RETURN;
            }
        }
 
        // No mode given, try global ones
        if ($mode === null) {
            // Class error handler
            if (isset($this) && isset($this->_default_error_mode)) {
                $mode    = $this->_default_error_mode;
                $options = $this->_default_error_options;
            // Global error handler
            } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) {
                $mode    = $GLOBALS['_PEAR_default_error_mode'];
                $options = $GLOBALS['_PEAR_default_error_options'];
            }
        }
 
        if ($error_class !== null) {
            $ec = $error_class;
        } elseif (isset($this) && isset($this->_error_class)) {
            $ec = $this->_error_class;
        } else {
            $ec = 'PEAR_Error';
        }
 
        if (intval(PHP_VERSION) < 5) {
            // little non-eval hack to fix bug #12147
            include 'PEAR/FixPHP5PEARWarnings.php';
            return $a;
        }
 
        if ($skipmsg) {
            $a = new $ec($code, $mode, $options, $userinfo);
        } else {
            $a = new $ec($message, $code, $mode, $options, $userinfo);
        }
 
        return $a;
    }
 
    /**
     * Simpler form of raiseError with fewer options.  In most cases
     * message, code and userinfo are enough.
     *
     * @param mixed $message a text error message or a PEAR error object
     *
     * @param int $code      a numeric error code (it is up to your class
     *                  to define these if you want to use codes)
     *
     * @param string $userinfo If you need to pass along for example debug
     *                  information, this parameter is meant for that.
     *
     * @access public
     * @return object   a PEAR error object
     * @see PEAR::raiseError
     */
    function &throwError($message = null, $code = null, $userinfo = null)
    {
        if (isset($this) && is_a($this, 'PEAR')) {
            $a = &$this->raiseError($message, $code, null, null, $userinfo);
            return $a;
        }
 
        $a = &PEAR::raiseError($message, $code, null, null, $userinfo);
        return $a;
    }
 
    function staticPushErrorHandling($mode, $options = null)
    {
        $stack       = &$GLOBALS['_PEAR_error_handler_stack'];
        $def_mode    = &$GLOBALS['_PEAR_default_error_mode'];
        $def_options = &$GLOBALS['_PEAR_default_error_options'];
        $stack[] = array($def_mode, $def_options);
        switch ($mode) {
            case PEAR_ERROR_EXCEPTION:
            case PEAR_ERROR_RETURN:
            case PEAR_ERROR_PRINT:
            case PEAR_ERROR_TRIGGER:
            case PEAR_ERROR_DIE:
            case null:
                $def_mode = $mode;
                $def_options = $options;
                break;
 
            case PEAR_ERROR_CALLBACK:
                $def_mode = $mode;
                // class/object method callback
                if (is_callable($options)) {
                    $def_options = $options;
                } else {
                    trigger_error("invalid error callback", E_USER_WARNING);
                }
                break;
 
            default:
                trigger_error("invalid error mode", E_USER_WARNING);
                break;
        }
        $stack[] = array($mode, $options);
        return true;
    }
 
    function staticPopErrorHandling()
    {
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
        $setmode     = &$GLOBALS['_PEAR_default_error_mode'];
        $setoptions  = &$GLOBALS['_PEAR_default_error_options'];
        array_pop($stack);
        list($mode, $options) = $stack[sizeof($stack) - 1];
        array_pop($stack);
        switch ($mode) {
            case PEAR_ERROR_EXCEPTION:
            case PEAR_ERROR_RETURN:
            case PEAR_ERROR_PRINT:
            case PEAR_ERROR_TRIGGER:
            case PEAR_ERROR_DIE:
            case null:
                $setmode = $mode;
                $setoptions = $options;
                break;
 
            case PEAR_ERROR_CALLBACK:
                $setmode = $mode;
                // class/object method callback
                if (is_callable($options)) {
                    $setoptions = $options;
                } else {
                    trigger_error("invalid error callback", E_USER_WARNING);
                }
                break;
 
            default:
                trigger_error("invalid error mode", E_USER_WARNING);
                break;
        }
        return true;
    }
 
    /**
     * Push a new error handler on top of the error handler options stack. With this
     * you can easily override the actual error handler for some code and restore
     * it later with popErrorHandling.
     *
     * @param mixed $mode (same as setErrorHandling)
     * @param mixed $options (same as setErrorHandling)
     *
     * @return bool Always true
     *
     * @see PEAR::setErrorHandling
     */
    function pushErrorHandling($mode, $options = null)
    {
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
        if (isset($this) && is_a($this, 'PEAR')) {
            $def_mode    = &$this->_default_error_mode;
            $def_options = &$this->_default_error_options;
        } else {
            $def_mode    = &$GLOBALS['_PEAR_default_error_mode'];
            $def_options = &$GLOBALS['_PEAR_default_error_options'];
        }
        $stack[] = array($def_mode, $def_options);
 
        if (isset($this) && is_a($this, 'PEAR')) {
            $this->setErrorHandling($mode, $options);
        } else {
            PEAR::setErrorHandling($mode, $options);
        }
        $stack[] = array($mode, $options);
        return true;
    }
 
    /**
    * Pop the last error handler used
    *
    * @return bool Always true
    *
    * @see PEAR::pushErrorHandling
    */
    function popErrorHandling()
    {
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
        array_pop($stack);
        list($mode, $options) = $stack[sizeof($stack) - 1];
        array_pop($stack);
        if (isset($this) && is_a($this, 'PEAR')) {
            $this->setErrorHandling($mode, $options);
        } else {
            PEAR::setErrorHandling($mode, $options);
        }
        return true;
    }
 
    /**
    * OS independant PHP extension load. Remember to take care
    * on the correct extension name for case sensitive OSes.
    *
    * @param string $ext The extension name
    * @return bool Success or not on the dl() call
    */
    function loadExtension($ext)
    {
        if (extension_loaded($ext)) {
            return true;
        }
 
        // if either returns true dl() will produce a FATAL error, stop that
        if (
            function_exists('dl') === false ||
            ini_get('enable_dl') != 1 ||
            ini_get('safe_mode') == 1
        ) {
            return false;
        }
 
        if (OS_WINDOWS) {
            $suffix = '.dll';
        } elseif (PHP_OS == 'HP-UX') {
            $suffix = '.sl';
        } elseif (PHP_OS == 'AIX') {
            $suffix = '.a';
        } elseif (PHP_OS == 'OSX') {
            $suffix = '.bundle';
        } else {
            $suffix = '.so';
        }
 
        return @dl('php_'.$ext.$suffix) || @dl($ext.$suffix);
    }
}
 
if (PEAR_ZE2) {
    include_once 'PEAR5.php';
}
 
function _PEAR_call_destructors()
{
    global $_PEAR_destructor_object_list;
    if (is_array($_PEAR_destructor_object_list) &&
        sizeof($_PEAR_destructor_object_list))
    {
        reset($_PEAR_destructor_object_list);
        if (PEAR_ZE2) {
            $destructLifoExists = PEAR5::getStaticProperty('PEAR', 'destructlifo');
        } else {
            $destructLifoExists = PEAR::getStaticProperty('PEAR', 'destructlifo');
        }
 
        if ($destructLifoExists) {
            $_PEAR_destructor_object_list = array_reverse($_PEAR_destructor_object_list);
        }
 
        while (list($k, $objref) = each($_PEAR_destructor_object_list)) {
            $classname = get_class($objref);
            while ($classname) {
                $destructor = "_$classname";
                if (method_exists($objref, $destructor)) {
                    $objref->$destructor();
                    break;
                } else {
                    $classname = get_parent_class($classname);
                }
            }
        }
        // Empty the object list to ensure that destructors are
        // not called more than once.
        $_PEAR_destructor_object_list = array();
    }
 
    // Now call the shutdown functions
    if (
        isset($GLOBALS['_PEAR_shutdown_funcs']) &&
        is_array($GLOBALS['_PEAR_shutdown_funcs']) &&
        !empty($GLOBALS['_PEAR_shutdown_funcs'])
    ) {
        foreach ($GLOBALS['_PEAR_shutdown_funcs'] as $value) {
            call_user_func_array($value[0], $value[1]);
        }
    }
}
 
/**
 * Standard PEAR error class for PHP 4
 *
 * This class is supserseded by {@link PEAR_Exception} in PHP 5
 *
 * @category   pear
 * @package    PEAR
 * @author     Stig Bakken <ssb@php.net>
 * @author     Tomas V.V. Cox <cox@idecnet.com>
 * @author     Gregory Beaver <cellog@php.net>
 * @copyright  1997-2006 The PHP Group
 * @license    http://opensource.org/licenses/bsd-license.php New BSD License
 * @version    Release: 1.9.4
 * @link       http://pear.php.net/manual/en/core.pear.pear-error.php
 * @see        PEAR::raiseError(), PEAR::throwError()
 * @since      Class available since PHP 4.0.2
 */
class PEAR_Error
{
    var $error_message_prefix = '';
    var $mode                 = PEAR_ERROR_RETURN;
    var $level                = E_USER_NOTICE;
    var $code                 = -1;
    var $message              = '';
    var $userinfo             = '';
    var $backtrace            = null;
 
    /**
     * PEAR_Error constructor
     *
     * @param string $message  message
     *
     * @param int $code     (optional) error code
     *
     * @param int $mode     (optional) error mode, one of: PEAR_ERROR_RETURN,
     * PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER,
     * PEAR_ERROR_CALLBACK or PEAR_ERROR_EXCEPTION
     *
     * @param mixed $options   (optional) error level, _OR_ in the case of
     * PEAR_ERROR_CALLBACK, the callback function or object/method
     * tuple.
     *
     * @param string $userinfo (optional) additional user/debug info
     *
     * @access public
     *
     */
    function PEAR_Error($message = 'unknown error', $code = null,
                        $mode = null, $options = null, $userinfo = null)
    {
        if ($mode === null) {
            $mode = PEAR_ERROR_RETURN;
        }
        $this->message   = $message;
        $this->code      = $code;
        $this->mode      = $mode;
        $this->userinfo  = $userinfo;
 
        if (PEAR_ZE2) {
            $skiptrace = PEAR5::getStaticProperty('PEAR_Error', 'skiptrace');
        } else {
            $skiptrace = PEAR::getStaticProperty('PEAR_Error', 'skiptrace');
        }
 
        if (!$skiptrace) {
            $this->backtrace = debug_backtrace();
            if (isset($this->backtrace[0]) && isset($this->backtrace[0]['object'])) {
                unset($this->backtrace[0]['object']);
            }
        }
 
        if ($mode & PEAR_ERROR_CALLBACK) {
            $this->level = E_USER_NOTICE;
            $this->callback = $options;
        } else {
            if ($options === null) {
                $options = E_USER_NOTICE;
            }
 
            $this->level = $options;
            $this->callback = null;
        }
 
        if ($this->mode & PEAR_ERROR_PRINT) {
            if (is_null($options) || is_int($options)) {
                $format = "%s";
            } else {
                $format = $options;
            }
 
            printf($format, $this->getMessage());
        }
 
        if ($this->mode & PEAR_ERROR_TRIGGER) {
            trigger_error($this->getMessage(), $this->level);
        }
 
        if ($this->mode & PEAR_ERROR_DIE) {
            $msg = $this->getMessage();
            if (is_null($options) || is_int($options)) {
                $format = "%s";
                if (substr($msg, -1) != "\n") {
                    $msg .= "\n";
                }
            } else {
                $format = $options;
            }
            die(sprintf($format, $msg));
        }
 
        if ($this->mode & PEAR_ERROR_CALLBACK && is_callable($this->callback)) {
            call_user_func($this->callback, $this);
        }
 
        if ($this->mode & PEAR_ERROR_EXCEPTION) {
            trigger_error("PEAR_ERROR_EXCEPTION is obsolete, use class PEAR_Exception for exceptions", E_USER_WARNING);
            eval('$e = new Exception($this->message, $this->code);throw($e);');
        }
    }
 
    /**
     * Get the error mode from an error object.
     *
     * @return int error mode
     * @access public
     */
    function getMode()
    {
        return $this->mode;
    }
 
    /**
     * Get the callback function/method from an error object.
     *
     * @return mixed callback function or object/method array
     * @access public
     */
    function getCallback()
    {
        return $this->callback;
    }
 
    /**
     * Get the error message from an error object.
     *
     * @return  string  full error message
     * @access public
     */
    function getMessage()
    {
        return ($this->error_message_prefix . $this->message);
    }
 
    /**
     * Get error code from an error object
     *
     * @return int error code
     * @access public
     */
     function getCode()
     {
        return $this->code;
     }
 
    /**
     * Get the name of this error/exception.
     *
     * @return string error/exception name (type)
     * @access public
     */
    function getType()
    {
        return get_class($this);
    }
 
    /**
     * Get additional user-supplied information.
     *
     * @return string user-supplied information
     * @access public
     */
    function getUserInfo()
    {
        return $this->userinfo;
    }
 
    /**
     * Get additional debug information supplied by the application.
     *
     * @return string debug information
     * @access public
     */
    function getDebugInfo()
    {
        return $this->getUserInfo();
    }
 
    /**
     * Get the call backtrace from where the error was generated.
     * Supported with PHP 4.3.0 or newer.
     *
     * @param int $frame (optional) what frame to fetch
     * @return array Backtrace, or NULL if not available.
     * @access public
     */
    function getBacktrace($frame = null)
    {
        if (defined('PEAR_IGNORE_BACKTRACE')) {
            return null;
        }
        if ($frame === null) {
            return $this->backtrace;
        }
        return $this->backtrace[$frame];
    }
 
    function addUserInfo($info)
    {
        if (empty($this->userinfo)) {
            $this->userinfo = $info;
        } else {
            $this->userinfo .= " ** $info";
        }
    }
 
    function __toString()
    {
        return $this->getMessage();
    }
 
    /**
     * Make a string representation of this object.
     *
     * @return string a string with an object summary
     * @access public
     */
    function toString()
    {
        $modes = array();
        $levels = array(E_USER_NOTICE  => 'notice',
                        E_USER_WARNING => 'warning',
                        E_USER_ERROR   => 'error');
        if ($this->mode & PEAR_ERROR_CALLBACK) {
            if (is_array($this->callback)) {
                $callback = (is_object($this->callback[0]) ?
                    strtolower(get_class($this->callback[0])) :
                    $this->callback[0]) . '::' .
                    $this->callback[1];
            } else {
                $callback = $this->callback;
            }
            return sprintf('[%s: message="%s" code=%d mode=callback '.
                           'callback=%s prefix="%s" info="%s"]',
                           strtolower(get_class($this)), $this->message, $this->code,
                           $callback, $this->error_message_prefix,
                           $this->userinfo);
        }
        if ($this->mode & PEAR_ERROR_PRINT) {
            $modes[] = 'print';
        }
        if ($this->mode & PEAR_ERROR_TRIGGER) {
            $modes[] = 'trigger';
        }
        if ($this->mode & PEAR_ERROR_DIE) {
            $modes[] = 'die';
        }
        if ($this->mode & PEAR_ERROR_RETURN) {
            $modes[] = 'return';
        }
        return sprintf('[%s: message="%s" code=%d mode=%s level=%s '.
                       'prefix="%s" info="%s"]',
                       strtolower(get_class($this)), $this->message, $this->code,
                       implode("|", $modes), $levels[$this->level],
                       $this->error_message_prefix,
                       $this->userinfo);
    }
}
 
 
// Uncomment the folling define if you want the class to automatically
// read the MPEG frame info to get bitrate, mpeg version, layer, etc.
//
// NOTE: This is needed to maintain pre-version 1.0 behavior which maybe
// needed if you are using info that is from the mpeg frame. This includes
// the length of the song.
//
// This is discouraged because it will siginfincantly lengthen script
// execution time if all you need is the ID3 tag info.
// define('ID3_AUTO_STUDY', true);
 
// Uncomment the following define if you want tons of debgging info.
// Tip: make sure you use a <PRE> block so the print_r's are readable.
// define('ID3_SHOW_DEBUG', true);
 
/**
* File not opened
* @const PEAR_MP3_ID_FNO
*/
define('PEAR_MP3_ID_FNO', 1);
 
/**
* Read error
* @const PEAR_MP3_ID_RE
*/
define('PEAR_MP3_ID_RE', 2);
 
/**
* Tag not found
* @const PEAR_MP3_ID_TNF
*/
define('PEAR_MP3_ID_TNF', 3);
 
/**
* File is not a MP3 file (corrupted?)
* @const PEAR_MP3_ID_NOMP3
*/
define('PEAR_MP3_ID_NOMP3', 4);
 
/**
 * A Class for reading/writing MP3 ID3 tags
 *
 * Note: This code doesn't try to deal with corrupt mp3s. So if you get
 * incorrect length times or something else it may be your mp3. To fix just
 * re-enocde from the CD. :~)
 *
 * eg:
 * require_once("MP3/Id.php");
 * $file = "Some Song.mp3";
 *
 * $id3 = &new MP3_Id();
 * $id3->read($file);
 * print_r($id3);
 *
 * echo $id3->getTag('artists');
 *
 * $id3->comment = "Be gentle with that file.";
 * $id3->write();
 * $id3->read($file);
 * print_r($id3 );
 *
 * @package MP3_Id
 * @author Sandy McArthur Jr. <Leknor@Leknor.com>
 * @version $Id: Id.php 315617 2011-08-27 14:36:36Z alexmerz $
 */
class MP3_Id {
 
    /**
    * mp3/mpeg file name
    * @var boolean
    */
    var $file = false;
    /**
    * ID3 v1 tag found? (also true if v1.1 found)
    * @var boolean
    */
    var $id3v1 = false;
    /**
    * ID3 v1.1 tag found?
    * @var boolean
    */
    var $id3v11 = false;
    /**
    * ID3 v2 tag found? (not used yet)
    * @var boolean
    */
    var $id3v2 = false;
 
    // ID3v1.1 Fields:
    /**
    * trackname
    * @var string
    */
    var $name = '';
    /**
    * artists
    * @var string
    */
    var $artists = '';
    /**
    * album
    * @var string
    */
    var $album = '';
    /**
    * year
    * @var string
    */
    var $year = '';
    /**
    * comment
    * @var string
    */
    var $comment = '';
    /**
    * track number
    * @var integer
    */
    var $track = 0;
    /**
    * genre name
    * @var string
    */
    var $genre = '';
    /**
    * genre number
    * @var integer
    */
    var $genreno = 255;
 
    // MP3 Frame Stuff
    /**
    * Was the file studied to learn more info?
    * @var boolean
    */
    var $studied = false;
 
    /**
    * version of mpeg
    * @var integer
    */
    var $mpeg_ver = 0;
    /**
    * version of layer
    * @var integer
    */
    var $layer = 0;
    /**
    * version of bitrate
    * @var integer
    */
    var $bitrate = 0;
    /**
    * Frames are crc protected?
    * @var boolean
    */
    var $crc = false;
    /**
    * frequency
    * @var integer
    */
    var $frequency = 0;
    /**
    * encoding type (CBR or VBR)
    * @var string
    */
    var $encoding_type = 0;
    /**
    * number of samples per MPEG audio frame
    * @var integer
    */
    var $samples_per_frame = 0;
    /**
    * samples in file
    * @var integer
    */
    var $samples = 0;
    /**
    * Bytes in file without tag overhead
    * @var integer
    */
    var $musicsize = -1;
    /**
    * number of MPEG audio frames
    * @var integer
    */
    var $frames = 0;
    /**
    * quality indicator (0% - 100%)
    * @var integer
    */
    var $quality = 0;
    /**
    * Frames padded
    * @var boolean
    */
    var $padding = false;
    /**
    * private bit set
    * @var boolean
    */
    var $private = false;
    /**
    * Mode (Stero etc)
    * @var string
    */
    var $mode = '';
    /**
    * Copyrighted
    * @var string
    */
    var $copyright = false;
    /**
    * On Original Media? (never used)
    * @var boolean
    */
    var $original = false;
    /**
    * Emphasis (also never used)
    * @var boolean
    */
    var $emphasis = '';
    /**
    * Bytes in file
    * @var integer
    */
    var $filesize = -1;
    /**
    * Byte at which the first mpeg header was found
    * @var integer
    */
    var $frameoffset = -1;
     /**
    * length of mp3 format hh:mm:ss
    * @var string
    */
    var $lengthh = false;
    /**
    * length of mp3 format mm:ss
    * @var string
    */
    var $length = false;
    /**
    * length of mp3 in seconds
    * @var string
    */
    var $lengths = false;
 
    /**
    * if any errors they will be here
    * @var string
    */
    var $error = false;
 
    /**
    * print debugging info?
    * @var boolean
    */
    var $debug = false;
    /**
    * print debugg
    * @var string
    */
    var $debugbeg = '<DIV STYLE="margin: 0.5 em; padding: 0.5 em; border-width: thin; border-color: black; border-style: solid">';
    /**
    * print debugg
    * @var string
    */
    var $debugend = '</DIV>';
 
    /*
     * creates a new id3 object
     * and loads a tag from a file.
     *
     * @param string    $study  study the mpeg frame to get extra info like bitrate and frequency
     *                          You should advoid studing alot of files as it will siginficantly
     *                          slow this down.
     * @access public
     */
    function MP3_Id($study = false) {
        if(defined('ID3_SHOW_DEBUG')) $this->debug = true;
        $this->study=($study || defined('ID3_AUTO_STUDY'));
 
    } // id3()
 
    /**
    * reads the given file and parse it
    *
    * @param    string  $file the name of the file to parse
    * @return   mixed   PEAR_Error on error
    * @access   public
    */
    function read( $file="") {
        if ($this->debug) print($this->debugbeg . "id3('$file')<HR>\n");
 
        if(!empty($file))$this->file = $file;
        if ($this->debug) print($this->debugend);
 
        return $this->_read_v1();
    }
 
    /**
    * sets a field
    *
    * possible names of tags are:
    * artists   - Name of band or artist
    * album     - Name of the album
    * year      - publishing year of the album or song
    * comment   - song comment
    * track     - the number of the track
    * genre     - genre of the song
    * genreno   - Number of the genre
    *
    * @param    mixed   $name   Name of the tag to set or hash with the key as fieldname
    * @param    mixed   $value  the value to set
    *
    * @access   public
    */
    function setTag($name, $value) {
        if( is_array($name)) {
            foreach( $name as $n => $v) {
                $this -> $n = $v ;
                }
        } else {
            $this -> $name = $value ;
        }
    }
 
    /**
    * get the value of a tag
    *
    * @param    string  $name       the name of the field to get
    * @param    mixed   $default    returned if the field not exists
    *
    * @return   mixed   The value of the field
    * @access   public
    * @see      setTag
    */
    function getTag($name, $default = 0) {
        if(empty($this -> $name)) {
            return $default ;
        } else {
            return $this -> $name ;
        }
    }
 
    /**
     * update the id3v1 tags on the file.
     * Note: If/when ID3v2 is implemented this method will probably get another
     *       parameters.
     *
     * @param boolean $v1   if true update/create an id3v1 tag on the file. (defaults to true)
     *
     * @access public
     */
    function write($v1 = true) {
    if ($this->debug) print($this->debugbeg . "write()<HR>\n");
    if ($v1) {
        $this->_write_v1();
    }
    if ($this->debug) print($this->debugend);
    } // write()
 
    /**
     * study() - does extra work to get the MPEG frame info.
     *
     * @access public
     */
    function study() {
    $this->studied = true;
    $this->_readframe();
    } // study()
 
    /**
     * copy($from) - set's the ID3 fields to the same as the fields in $from
     *
     * @param string    $from   fields to copy
     * @access public
     */
    function copy($from) {
    if ($this->debug) print($this->debugbeg . "copy(\$from)<HR>\n");
    $this->name = $from->name;
    $this->artists  = $from->artists;
    $this->album    = $from->album;
    $this->year = $from->year;
    $this->comment  = $from->comment;
    $this->track    = $from->track;
    $this->genre    = $from->genre;
    $this->genreno  = $from->genreno;
    if ($this->debug) print($this->debugend);
    } // copy($from)
 
    /**
     * remove - removes the id3 tag(s) from a file.
     *
     * @param boolean   $id3v1  true to remove the tag
     * @param boolean   $id3v2  true to remove the tag (Not yet implemented)
     *
     * @access public
     */
    function remove($id3v1 = true, $id3v2 = true) {
    if ($this->debug) print($this->debugbeg . "remove()<HR>\n");
 
    if ($id3v1) {
        $this->_remove_v1();
    }
 
    if ($id3v2) {
        // TODO: write ID3v2 code
    }
 
    if ($this->debug) print($this->debugend);
    } // remove
 
 
    /**
     * read a ID3 v1 or v1.1 tag from a file
     *
     * $file should be the path to the mp3 to look for a tag.
     * When in doubt use the full path.
     *
     * @return mixed    PEAR_Error if fails
     * @access private
     */
    function _read_v1() {
    if ($this->debug) print($this->debugbeg . "_read_v1()<HR>\n");
 
    if (! ($f = @fopen($this->file, 'rb')) ) {
        return PEAR::raiseError( "Unable to open " . $this->file, PEAR_MP3_ID_FNO);
    }
 
    if (fseek($f, -128, SEEK_END) == -1) {
        return PEAR::raiseError( 'Unable to see to end - 128 of ' . $this->file, PEAR_MP3_ID_RE);
    }
 
    $r = fread($f, 128);
    fclose($f);
 
    if ($this->debug) {
        $unp = unpack('H*raw', $r);
        print_r($unp);
    }
 
    $id3tag = $this->_decode_v1($r);
 
    if(!PEAR::isError( $id3tag)) {
        $this->id3v1 = true;
 
        $tmp = explode(Chr(0), $id3tag['NAME']);
        $this->name = $tmp[0];
 
        $tmp = explode(Chr(0), $id3tag['ARTISTS']);
        $this->artists = $tmp[0];
 
        $tmp = explode(Chr(0), $id3tag['ALBUM']);
        $this->album = $tmp[0];
 
        $tmp = explode(Chr(0), $id3tag['YEAR']);
        $this->year = $tmp[0];
 
        $tmp = explode(Chr(0), $id3tag['COMMENT']);
        $this->comment = $tmp[0];
 
        if (isset($id3tag['TRACK'])) {
        $this->id3v11 = true;
        $this->track = $id3tag['TRACK'];
        }
 
        $this->genreno = $id3tag['GENRENO'];
        $this->genre = $id3tag['GENRE'];
    } else {
        return $id3tag ;
        }
 
    if ($this->debug) print($this->debugend);
    } // _read_v1()
 
    /**
     * decodes that ID3v1 or ID3v1.1 tag
     *
     * false will be returned if there was an error decoding the tag
     * else an array will be returned
     *
     * @param   string  $rawtag    tag to decode
     * @return  string  decoded tag
     * @access  private
     */
    function _decode_v1($rawtag) {
    if ($this->debug) print($this->debugbeg . "_decode_v1(\$rawtag)<HR>\n");
 
    if ($rawtag[125] == Chr(0) and $rawtag[126] != Chr(0)) {
        // ID3 v1.1
        $format = 'a3TAG/a30NAME/a30ARTISTS/a30ALBUM/a4YEAR/a28COMMENT/x1/C1TRACK/C1GENRENO';
    } else {
        // ID3 v1
        $format = 'a3TAG/a30NAME/a30ARTISTS/a30ALBUM/a4YEAR/a30COMMENT/C1GENRENO';
    }
 
    $id3tag = unpack($format, $rawtag);
    if ($this->debug) print_r($id3tag);
 
    if ($id3tag['TAG'] == 'TAG') {
        $id3tag['GENRE'] = $this->getgenre($id3tag['GENRENO']);
    } else {
        $id3tag = PEAR::raiseError( 'TAG not found', PEAR_MP3_ID_TNF);
    }
    if ($this->debug) print($this->debugend);
    return $id3tag;
    } // _decode_v1()
 
 
    /**
     * writes a ID3 v1 or v1.1 tag to a file
     *
     * @return mixed    returns PEAR_Error when fails
     * @access private
     */
    function _write_v1() {
    if ($this->debug) print($this->debugbeg . "_write_v1()<HR>\n");
 
    $file = $this->file;
 
    if (! ($f = @fopen($file, 'r+b')) ) {
        return PEAR::raiseError( "Unable to open " . $file, PEAR_MP3_ID_FNO);
    }
 
    if (fseek($f, -128, SEEK_END) == -1) {
//        $this->error = 'Unable to see to end - 128 of ' . $file;
        return PEAR::raiseError( "Unable to see to end - 128 of " . $file, PEAR_MP3_ID_RE);
    }
 
    $this->genreno = $this->getgenreno($this->genre, $this->genreno);
 
    $newtag = $this->_encode_v1();
 
    $r = fread($f, 128);
 
    if ( !PEAR::isError( $this->_decode_v1($r))) {
        if (fseek($f, -128, SEEK_END) == -1) {
//        $this->error = 'Unable to see to end - 128 of ' . $file;
        return PEAR::raiseError( "Unable to see to end - 128 of " . $file, PEAR_MP3_ID_RE);
        }
        fwrite($f, $newtag);
    } else {
        if (fseek($f, 0, SEEK_END) == -1) {
//        $this->error = 'Unable to see to end of ' . $file;
        return PEAR::raiseError( "Unable to see to end of " . $file, PEAR_MP3_ID_RE);
        }
        fwrite($f, $newtag);
    }
    fclose($f);
 
    if ($this->debug) print($this->debugend);
    } // _write_v1()
 
    /*
     * encode the ID3 tag
     *
     * the newly built tag will be returned
     *
     * @return string the new tag
     * @access private
     */
    function _encode_v1() {
    if ($this->debug) print($this->debugbeg . "_encode_v1()<HR>\n");
 
    if ($this->track) {
        // ID3 v1.1
        $id3pack = 'a3a30a30a30a4a28x1C1C1';
        $newtag = pack($id3pack,
            'TAG',
            $this->name,
            $this->artists,
            $this->album,
            $this->year,
            $this->comment,
            $this->track,
            $this->genreno
              );
    } else {
        // ID3 v1
        $id3pack = 'a3a30a30a30a4a30C1';
        $newtag = pack($id3pack,
            'TAG',
            $this->name,
            $this->artists,
            $this->album,
            $this->year,
            $this->comment,
            $this->genreno
              );
    }
 
    if ($this->debug) {
        print('id3pack: ' . $id3pack . "\n");
        $unp = unpack('H*new', $newtag);
        print_r($unp);
    }
 
    if ($this->debug) print($this->debugend);
    return $newtag;
    } // _encode_v1()
 
    /**
     * if exists it removes an ID3v1 or v1.1 tag
     *
     * returns true if the tag was removed or none was found
     * else false if there was an error
     *
     * @return boolean true, if the tag was removed
     * @access private
     */
    function _remove_v1() {
    if ($this->debug) print($this->debugbeg . "_remove_v1()<HR>\n");
 
    $file = $this->file;
 
    if (! ($f = fopen($file, 'r+b')) ) {
        return PEAR::raiseError( "Unable to open " . $file, PEAR_MP3_ID_FNO);
    }
 
    if (fseek($f, -128, SEEK_END) == -1) {
        return PEAR::raiseError( 'Unable to see to end - 128 of ' . $file, PEAR_MP3_ID_RE);
    }
 
    $r = fread($f, 128);
 
    $success = false;
    if ( !PEAR::isError( $this->_decode_v1($r))) {
        $size = filesize($this->file) - 128;
        if ($this->debug) print('size: old: ' . filesize($this->file));
        $success = ftruncate($f, $size);
        clearstatcache();
        if ($this->debug) print(' new: ' . filesize($this->file));
    }
    fclose($f);
 
    if ($this->debug) print($this->debugend);
    return $success;
    } // _remove_v1()
 
    /**
    * reads a frame from the file
    *
    * @return mixed PEAR_Error when fails
    * @access private
    */
    function _readframe() {
    if ($this->debug) print($this->debugbeg . "_readframe()<HR>\n");
 
    $file = $this->file;
 
    if (! ($f = fopen($file, 'rb')) ) {
        if ($this->debug) print($this->debugend);
        return PEAR::raiseError( "Unable to open " . $file, PEAR_MP3_ID_FNO) ;
    }
 
    $this->filesize = filesize($file);
 
    do {
        while (fread($f,1) != Chr(255)) { // Find the first frame
        if ($this->debug) echo "Find...\n";
        if (feof($f)) {
            if ($this->debug) print($this->debugend);
            return PEAR::raiseError( "No mpeg frame found", PEAR_MP3_ID_NOMP3) ;
        }
        }
        fseek($f, ftell($f) - 1); // back up one byte
 
        $frameoffset = ftell($f);
 
        $r = fread($f, 4);
        // Binary to Hex to a binary sting. ugly but best I can think of.
        // $bits = unpack('H*bits', $r);
        // $bits =  base_convert($bits['bits'],16,2);
        $bits = sprintf("%'08b%'08b%'08b%'08b", ord($r{0}), ord($r{1}), ord($r{2}), ord($r{3}));
    } while (!$bits[8] and !$bits[9] and !$bits[10]); // 1st 8 bits true from the while
    if ($this->debug) print('Bits: ' . $bits . "\n");
 
    $this->frameoffset = $frameoffset;
 
    // Detect VBR header
    if ($bits[11] == 0) {
        if (($bits[24] == 1) && ($bits[25] == 1)) {
            $vbroffset = 9; // MPEG 2.5 Mono
        } else {
            $vbroffset = 17; // MPEG 2.5 Stereo
        }
    } else if ($bits[12] == 0) {
        if (($bits[24] == 1) && ($bits[25] == 1)) {
            $vbroffset = 9; // MPEG 2 Mono
        } else {
            $vbroffset = 17; // MPEG 2 Stereo
        }
    } else {
        if (($bits[24] == 1) && ($bits[25] == 1)) {
            $vbroffset = 17; // MPEG 1 Mono
        } else {
            $vbroffset = 32; // MPEG 1 Stereo
        }
    }
 
    fseek($f, ftell($f) + $vbroffset);
    $r = fread($f, 4);
 
    switch ($r) {
        case 'Xing':
            $this->encoding_type = 'VBR';
        case 'Info':
            // Extract info from Xing header
 
            if ($this->debug) print('Encoding Header: ' . $r . "\n");
 
            $r = fread($f, 4);
            $vbrbits = sprintf("%'08b", ord($r{3}));
 
            if ($this->debug) print('XING Header Bits: ' . $vbrbits . "\n");
 
            if ($vbrbits[7] == 1) {
                // Next 4 bytes contain number of frames
                $r = fread($f, 4);
                $this->frames = unpack('N', $r);
                $this->frames = $this->frames[1];
            }
 
            if ($vbrbits[6] == 1) {
                // Next 4 bytes contain number of bytes
                $r = fread($f, 4);
                $this->musicsize = unpack('N', $r);
                $this->musicsize = $this->musicsize[1];
            }
 
            if ($vbrbits[5] == 1) {
                // Next 100 bytes contain TOC entries, skip
                fseek($f, ftell($f) + 100);
            }
 
            if ($vbrbits[4] == 1) {
                // Next 4 bytes contain Quality Indicator
                $r = fread($f, 4);
                $this->quality = unpack('N', $r);
                $this->quality = $this->quality[1];
            }
 
            break;
 
        case 'VBRI':
        default:
            if ($vbroffset != 32) {
                // VBRI Header is fixed after 32 bytes, so maybe we are looking at the wrong place.
                fseek($f, ftell($f) + 32 - $vbroffset);
                $r = fread($f, 4);
 
                if ($r != 'VBRI') {
                    $this->encoding_type = 'CBR';
                    break;
                }
            } else {
                $this->encoding_type = 'CBR';
                break;
            }
 
            if ($this->debug) print('Encoding Header: ' . $r . "\n");
 
            $this->encoding_type = 'VBR';
 
            // Next 2 bytes contain Version ID, skip
            fseek($f, ftell($f) + 2);
 
            // Next 2 bytes contain Delay, skip
            fseek($f, ftell($f) + 2);
 
            // Next 2 bytes contain Quality Indicator
            $r = fread($f, 2);
            $this->quality = unpack('n', $r);
            $this->quality = $this->quality[1];
 
            // Next 4 bytes contain number of bytes
            $r = fread($f, 4);
            $this->musicsize = unpack('N', $r);
            $this->musicsize = $this->musicsize[1];
 
            // Next 4 bytes contain number of frames
            $r = fread($f, 4);
            $this->frames = unpack('N', $r);
            $this->frames = $this->frames[1];
    }
 
    fclose($f);
 
    if ($bits[11] == 0) {
        $this->mpeg_ver = "2.5";
        $bitrates = array(
            '1' => array(0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0),
            '2' => array(0,  8, 16, 24, 32, 40, 48,  56,  64,  80,  96, 112, 128, 144, 160, 0),
            '3' => array(0,  8, 16, 24, 32, 40, 48,  56,  64,  80,  96, 112, 128, 144, 160, 0),
                 );
    } else if ($bits[12] == 0) {
        $this->mpeg_ver = "2";
        $bitrates = array(
            '1' => array(0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256, 0),
            '2' => array(0,  8, 16, 24, 32, 40, 48,  56,  64,  80,  96, 112, 128, 144, 160, 0),
            '3' => array(0,  8, 16, 24, 32, 40, 48,  56,  64,  80,  96, 112, 128, 144, 160, 0),
                 );
    } else {
        $this->mpeg_ver = "1";
        $bitrates = array(
            '1' => array(0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448, 0),
            '2' => array(0, 32, 48, 56,  64,  80,  96, 112, 128, 160, 192, 224, 256, 320, 384, 0),
            '3' => array(0, 32, 40, 48,  56,  64,  80,  96, 112, 128, 160, 192, 224, 256, 320, 0),
                 );
    }
    if ($this->debug) print('MPEG' . $this->mpeg_ver . "\n");
 
    $layer = array(
        array(0,3),
        array(2,1),
              );
    $this->layer = $layer[$bits[13]][$bits[14]];
    if ($this->debug) print('layer: ' . $this->layer . "\n");
 
    if ($bits[15] == 0) {
        // It's backwards, if the bit is not set then it is protected.
        if ($this->debug) print("protected (crc)\n");
        $this->crc = true;
    }
 
    $bitrate = 0;
    if ($bits[16] == 1) $bitrate += 8;
    if ($bits[17] == 1) $bitrate += 4;
    if ($bits[18] == 1) $bitrate += 2;
    if ($bits[19] == 1) $bitrate += 1;
    $this->bitrate = $bitrates[$this->layer][$bitrate];
 
    $frequency = array(
        '1' => array(
            '0' => array(44100, 48000),
            '1' => array(32000, 0),
                ),
        '2' => array(
            '0' => array(22050, 24000),
            '1' => array(16000, 0),
                ),
        '2.5' => array(
            '0' => array(11025, 12000),
            '1' => array(8000, 0),
                  ),
          );
    $this->frequency = $frequency[$this->mpeg_ver][$bits[20]][$bits[21]];
 
    $this->padding = $bits[22];
    $this->private = $bits[23];
 
    $mode = array(
        array('Stereo', 'Joint Stereo'),
        array('Dual Channel', 'Mono'),
             );
    $this->mode = $mode[$bits[24]][$bits[25]];
 
    // XXX: I dunno what the mode extension is for bits 26,27
 
    $this->copyright = $bits[28];
    $this->original = $bits[29];
 
    $emphasis = array(
        array('none', '50/15ms'),
        array('', 'CCITT j.17'),
             );
    $this->emphasis = $emphasis[$bits[30]][$bits[31]];
 
    $samplesperframe = array(
        '1' => array(
            '1' => 384,
            '2' => 1152,
            '3' => 1152
        ),
        '2' => array(
            '1' => 384,
            '2' => 1152,
            '3' => 576
        ),
        '2.5' => array(
            '1' => 384,
            '2' => 1152,
            '3' => 576
        ),
    );
    $this->samples_per_frame = $samplesperframe[$this->mpeg_ver][$this->layer];
 
    if ($this->encoding_type != 'VBR') {
        if ($this->bitrate == 0) {
            $s = -1;
        } else {
            $s = ((8*filesize($this->file))/1000) / $this->bitrate;
        }
        $this->length = sprintf('%02d:%02d',floor($s/60),floor($s-(floor($s/60)*60)));
        $this->lengthh = sprintf('%02d:%02d:%02d',floor($s/3600),floor($s/60),floor($s-(floor($s/60)*60)));
        $this->lengths = (int)$s;
 
        $this->samples = ceil($this->lengths * $this->frequency);
        if(0 != $this->samples_per_frame) {
            $this->frames = ceil($this->samples / $this->samples_per_frame);
        } else {
            $this->frames = 0;
        }
        $this->musicsize = ceil($this->lengths * $this->bitrate * 1000 / 8);
    } else {
        $this->samples = $this->samples_per_frame * $this->frames;
        $s = $this->samples / $this->frequency;
 
        $this->length = sprintf('%02d:%02d',floor($s/60),floor($s-(floor($s/60)*60)));
        $this->lengthh = sprintf('%02d:%02d:%02d',floor($s/3600),floor($s/60),floor($s-(floor($s/60)*60)));
        $this->lengths = (int)$s;
 
        $this->bitrate = (int)(($this->musicsize / $s) * 8 / 1000);
    }
 
    if ($this->debug) print($this->debugend);
    } // _readframe()
 
    /**
     * getGenre - return the name of a genre number
     *
     * if no genre number is specified the genre number from
     * $this->genreno will be used.
     *
     * the genre is returned or false if an error or not found
     * no error message is ever returned
     *
     * @param   integer $genreno Number of the genre
     * @return  mixed   false, if no genre found, else string
     *
     * @access public
     */
    function getGenre($genreno) {
    if ($this->debug) print($this->debugbeg . "getgenre($genreno)<HR>\n");
 
    $genres = $this->genres();
    if (isset($genres[$genreno])) {
        $genre = $genres[$genreno];
        if ($this->debug) print($genre . "\n");
    } else {
        $genre = '';
    }
 
    if ($this->debug) print($this->debugend);
    return $genre;
    } // getGenre($genreno)
 
    /*
     * getGenreNo - return the number of the genre name
     *
     * the genre number is returned or 0xff (255) if a match is not found
     * you can specify the default genreno to use if one is not found
     * no error message is ever returned
     *
     * @param   string  $genre      Name of the genre
     * @param   integer $default    Genre number in case of genre not found
     *
     * @access public
     */
    function getGenreNo($genre, $default = 0xff) {
    if ($this->debug) print($this->debugbeg . "getgenreno('$genre',$default)<HR>\n");
 
    $genres = $this->genres();
    $genreno = false;
    if ($genre) {
        foreach ($genres as $no => $name) {
        if (strtolower($genre) == strtolower($name)) {
            if ($this->debug) print("$no:'$name' == '$genre'");
            $genreno = $no;
        }
        }
    }
    if ($genreno === false) $genreno = $default;
    if ($this->debug) print($this->debugend);
    return $genreno;
    } // getGenreNo($genre, $default = 0xff)
 
    /*
     * genres - returns an array of the ID3v1 genres
     *
     * @return array
     *
     * @access public
     */
    function genres() {
    return array(
        0   => 'Blues',
        1   => 'Classic Rock',
        2   => 'Country',
        3   => 'Dance',
        4   => 'Disco',
        5   => 'Funk',
        6   => 'Grunge',
        7   => 'Hip-Hop',
        8   => 'Jazz',
        9   => 'Metal',
        10  => 'New Age',
        11  => 'Oldies',
        12  => 'Other',
        13  => 'Pop',
        14  => 'R&B',
        15  => 'Rap',
        16  => 'Reggae',
        17  => 'Rock',
        18  => 'Techno',
        19  => 'Industrial',
        20  => 'Alternative',
        21  => 'Ska',
        22  => 'Death Metal',
        23  => 'Pranks',
        24  => 'Soundtrack',
        25  => 'Euro-Techno',
        26  => 'Ambient',
        27  => 'Trip-Hop',
        28  => 'Vocal',
        29  => 'Jazz+Funk',
        30  => 'Fusion',
        31  => 'Trance',
        32  => 'Classical',
        33  => 'Instrumental',
        34  => 'Acid',
        35  => 'House',
        36  => 'Game',
        37  => 'Sound Clip',
        38  => 'Gospel',
        39  => 'Noise',
        40  => 'Alternative Rock',
        41  => 'Bass',
        42  => 'Soul',
        43  => 'Punk',
        44  => 'Space',
        45  => 'Meditative',
        46  => 'Instrumental Pop',
        47  => 'Instrumental Rock',
        48  => 'Ethnic',
        49  => 'Gothic',
        50  => 'Darkwave',
        51  => 'Techno-Industrial',
        52  => 'Electronic',
        53  => 'Pop-Folk',
        54  => 'Eurodance',
        55  => 'Dream',
        56  => 'Southern Rock',
        57  => 'Comedy',
        58  => 'Cult',
        59  => 'Gangsta',
        60  => 'Top 40',
        61  => 'Christian Rap',
        62  => 'Pop/Funk',
        63  => 'Jungle',
        64  => 'Native US',
        65  => 'Cabaret',
        66  => 'New Wave',
        67  => 'Psychadelic',
        68  => 'Rave',
        69  => 'Showtunes',
        70  => 'Trailer',
        71  => 'Lo-Fi',
        72  => 'Tribal',
        73  => 'Acid Punk',
        74  => 'Acid Jazz',
        75  => 'Polka',
        76  => 'Retro',
        77  => 'Musical',
        78  => 'Rock & Roll',
        79  => 'Hard Rock',
        80  => 'Folk',
        81  => 'Folk-Rock',
        82  => 'National Folk',
        83  => 'Swing',
        84  => 'Fast Fusion',
        85  => 'Bebob',
        86  => 'Latin',
        87  => 'Revival',
        88  => 'Celtic',
        89  => 'Bluegrass',
        90  => 'Avantgarde',
        91  => 'Gothic Rock',
        92  => 'Progressive Rock',
        93  => 'Psychedelic Rock',
        94  => 'Symphonic Rock',
        95  => 'Slow Rock',
        96  => 'Big Band',
        97  => 'Chorus',
        98  => 'Easy Listening',
        99  => 'Acoustic',
        100 => 'Humour',
        101 => 'Speech',
        102 => 'Chanson',
        103 => 'Opera',
        104 => 'Chamber Music',
        105 => 'Sonata',
        106 => 'Symphony',
        107 => 'Booty Bass',
        108 => 'Primus',
        109 => 'Porn Groove',
        110 => 'Satire',
        111 => 'Slow Jam',
        112 => 'Club',
        113 => 'Tango',
        114 => 'Samba',
        115 => 'Folklore',
        116 => 'Ballad',
        117 => 'Power Ballad',
        118 => 'Rhytmic Soul',
        119 => 'Freestyle',
        120 => 'Duet',
        121 => 'Punk Rock',
        122 => 'Drum Solo',
        123 => 'Acapella',
        124 => 'Euro-House',
        125 => 'Dance Hall',
        126 => 'Goa',
        127 => 'Drum & Bass',
        128 => 'Club-House',
        129 => 'Hardcore',
        130 => 'Terror',
        131 => 'Indie',
        132 => 'BritPop',
        133 => 'Negerpunk',
        134 => 'Polsk Punk',
        135 => 'Beat',
        136 => 'Christian Gangsta Rap',
        137 => 'Heavy Metal',
        138 => 'Black Metal',
        139 => 'Crossover',
        140 => 'Contemporary Christian',
        141 => 'Christian Rock',
        142 => 'Merengue',
        143 => 'Salsa',
        144 => 'Trash Metal',
        145 => 'Anime',
        146 => 'Jpop',
        147 => 'Synthpop'
            );
    } 
}
 
 
 
?>