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<?php |
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/** |
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* This file is part of the Metadata package. |
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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\Flag\FrameFlag; |
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use GravityMedia\Metadata\ID3v2\Version; |
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/** |
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* ID3v2 frame header reader class. |
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* |
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* @package GravityMedia\Metadata\ID3v2\Reader |
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*/ |
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class FrameHeaderReader extends AbstractReader |
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{ |
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/** |
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* @var string |
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*/ |
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private $name; |
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/** |
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* @var int |
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*/ |
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private $dataLength; |
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/** |
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* Read ID3v2 frame name. |
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* |
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* @return string |
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*/ |
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protected function readName() |
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{ |
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$this->getStream()->seek($this->getOffset()); |
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if (Version::VERSION_22 === $this->getVersion()) { |
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return rtrim($this->getStream()->read(3)); |
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} |
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return rtrim($this->getStream()->read(4)); |
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} |
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/** |
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* Get ID3v2 frame name. |
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* |
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* @return string |
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*/ |
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public function getName() |
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{ |
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if (null === $this->name) { |
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$this->name = $this->readName(); |
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} |
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return $this->name; |
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} |
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/** |
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* Read ID3v2 frame size. |
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* |
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* @return int |
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*/ |
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protected function readSize() |
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{ |
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View Code Duplication |
if (Version::VERSION_22 === $this->getVersion()) { |
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$this->getStream()->seek($this->getOffset() + 3); |
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return $this->getStream()->readUInt24(); |
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} |
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$this->getStream()->seek($this->getOffset() + 4); |
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$value = $this->getStream()->readUInt32(); |
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if (Version::VERSION_23 === $this->getVersion()) { |
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return $value; |
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} |
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return $this->getSynchsafeIntegerFilter()->decode($value); |
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} |
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/** |
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* Read ID3v2 frame flags. |
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* |
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* @return bool[] |
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*/ |
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protected function readFlags() |
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{ |
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if (Version::VERSION_22 === $this->getVersion()) { |
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return []; |
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} |
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$this->getStream()->seek($this->getOffset() + 8); |
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$flags = $this->getStream()->readUInt16(); |
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if (Version::VERSION_23 === $this->getVersion()) { |
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return [ |
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FrameFlag::FLAG_TAG_ALTER_PRESERVATION => (bool)($flags & 0x8000), |
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FrameFlag::FLAG_FILE_ALTER_PRESERVATION => (bool)($flags & 0x4000), |
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FrameFlag::FLAG_READ_ONLY => (bool)($flags & 0x2000), |
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FrameFlag::FLAG_COMPRESSION => (bool)($flags & 0x0080), |
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FrameFlag::FLAG_ENCRYPTION => (bool)($flags & 0x0040), |
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FrameFlag::FLAG_GROUPING_IDENTITY => (bool)($flags & 0x0020), |
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]; |
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} |
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return [ |
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FrameFlag::FLAG_TAG_ALTER_PRESERVATION => (bool)($flags & 0x4000), |
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FrameFlag::FLAG_FILE_ALTER_PRESERVATION => (bool)($flags & 0x2000), |
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FrameFlag::FLAG_READ_ONLY => (bool)($flags & 0x1000), |
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FrameFlag::FLAG_GROUPING_IDENTITY => (bool)($flags & 0x0040), |
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FrameFlag::FLAG_COMPRESSION => (bool)($flags & 0x0008), |
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FrameFlag::FLAG_ENCRYPTION => (bool)($flags & 0x0004), |
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FrameFlag::FLAG_UNSYNCHRONISATION => (bool)($flags & 0x0002), |
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FrameFlag::FLAG_DATA_LENGT_INDICATOR => (bool)($flags & 0x0001), |
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]; |
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} |
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/** |
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* Read ID3v2 frame data length. |
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* |
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* @return int |
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*/ |
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protected function readDataLength() |
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{ |
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if (!$this->isFlagEnabled(FrameFlag::FLAG_DATA_LENGT_INDICATOR)) { |
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return $this->getSize(); |
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} |
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$this->getStream()->seek($this->getOffset() + 10); |
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return $this->getSynchsafeIntegerFilter()->decode($this->getStream()->readUInt32()); |
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} |
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/** |
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* Get ID3v2 frame data length. |
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* |
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* @return int |
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*/ |
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public function getDataLength() |
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{ |
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if (null === $this->dataLength) { |
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$this->dataLength = $this->readDataLength(); |
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} |
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return $this->dataLength; |
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} |
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} |
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GravityMedia /
Metadata
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.