26 lines
982 B
PHP
26 lines
982 B
PHP
<?php
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namespace App\Media\QuickTime\Atoms\moov\meta;
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// The metadata item keys atom holds a list of the metadata keys that may be present in the metadata atom.
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// This list is indexed starting with 1; 0 is a reserved index value. The metadata item keys atom is a full atom with an atom type of "keys".
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use App\Media\QuickTime\Atoms\SubAtom;
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class keys extends SubAtom
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{
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public function __construct(int $offset,int $size,string $filename,?string $data)
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{
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parent::__construct($offset,$size,$filename);
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$this->keys = collect();
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$read = unpack($this->unpack(self::atom_record),substr($data,0,$ptr=$this->unpack_size(self::atom_record)));
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for ($i=0; $i<$read['count']; $i++) {
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$key_size = unpack('Nsize',substr($data,$ptr,4));
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$keys = unpack(sprintf('a4namespace/a%dname',$key_size['size']-8),substr($data,$ptr+4,4+$key_size['size']-8));
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$ptr += $key_size['size'];
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$this->cache = $this->cache->push(sprintf('%s.%s',$keys['namespace'],$keys['name']));
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}
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}
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} |