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<?php |
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/** |
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* This file is part of the Metadata project. |
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* |
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* @author Daniel Schröder <[email protected]> |
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*/ |
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namespace GravityMedia\Metadata\ID3v2\Reader; |
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use GravityMedia\Metadata\ID3v2\Filter\SynchsafeIntegerFilter; |
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use GravityMedia\Metadata\ID3v2\Reader; |
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use GravityMedia\Stream\Stream; |
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/** |
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* ID3v2 abstract header reader class. |
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* |
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* @package GravityMedia\Metadata\ID3v2\Reader |
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*/ |
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abstract class AbstractHeaderReader extends Reader |
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{ |
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/** |
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* @var SynchsafeIntegerFilter |
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*/ |
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private $synchsafeIntegerFilter; |
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/** |
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* @var int |
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*/ |
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private $size; |
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/** |
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* @var bool[] |
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*/ |
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private $flags; |
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/** |
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* Create ID3v2 abstract header reader object. |
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* |
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* @param Stream $stream |
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* @param int $version |
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*/ |
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public function __construct(Stream $stream, $version) |
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{ |
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parent::__construct($stream, $version); |
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$this->synchsafeIntegerFilter = new SynchsafeIntegerFilter(); |
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} |
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/** |
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* Get synchsafe integer filter |
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* |
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* @return SynchsafeIntegerFilter |
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*/ |
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protected function getSynchsafeIntegerFilter() |
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{ |
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return $this->synchsafeIntegerFilter; |
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} |
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/** |
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* Read size. |
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* |
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* @return int |
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*/ |
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abstract protected function readSize(); |
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/** |
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* Get size. |
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* |
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* @return int |
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*/ |
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public function getSize() |
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{ |
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if (null === $this->size) { |
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$this->size = $this->readSize(); |
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} |
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return $this->size; |
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} |
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/** |
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* Read flags. |
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* |
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* @return bool[] |
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*/ |
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abstract protected function readFlags(); |
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/** |
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* Whether the flag is enabled. |
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* |
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* @param int $flag |
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* |
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* @return bool |
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*/ |
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public function isFlagEnabled($flag) |
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{ |
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if (null === $this->flags) { |
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$this->flags = $this->readFlags(); |
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} |
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if (isset($this->flags[$flag])) { |
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return $this->flags[$flag]; |
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} |
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return false; |
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} |
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} |
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GravityMedia /
Metadata
