59 lines
1.0 KiB
PHP
59 lines
1.0 KiB
PHP
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<?php
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namespace App\Media\MSVideo\Containers\rlist;
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use Illuminate\Support\Arr;
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use App\Media\MSVideo\Container;
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class movi extends Container
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{
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public function __construct(int $offset,int $size,string $filename,bool $be)
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{
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parent::__construct($offset,$size,$filename,$be);
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// For debugging
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if (FALSE)
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$this->debug = hex_dump($data ?: $this->data());
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}
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public function __get(string $key): mixed
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{
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switch ($key) {
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case 'signature':
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return $this->signature();
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default:
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return parent::__get($key);
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}
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}
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/**
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* Calculate the signature of the data
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*
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* @param string $alg
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* @return string
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*/
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private function signature(string $alg='sha1'): string
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{
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if (! Arr::has($this->cache,'signature')) {
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if ($this->size) {
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$this->fopen();
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$hash = hash_init($alg);
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while (!is_null($read = $this->fread(16384)))
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hash_update($hash, $read);
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$this->fclose();
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$this->cache['signature'] = hash_final($hash);
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} else {
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$this->cache['signature'] = NULL;
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}
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}
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return $this->cache['signature'];
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}
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}
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