63 lines
1.3 KiB
PHP
63 lines
1.3 KiB
PHP
<?php
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namespace App\Media\QuickTime;
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use Illuminate\Support\Collection;
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use App\Media\QuickTime;
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use App\Media\QuickTime\Atoms\moov\{mvhd,trak};
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abstract class Atom extends QuickTime
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{
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use FindQuicktimeAtoms;
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protected int $offset;
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protected int $size;
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protected string $filename;
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protected Collection $atoms;
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public function __construct(int $offset,int $size,string $filename)
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{
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$this->offset = $offset;
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// Quick validation
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if ($size < 0)
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throw new \Exception(sprintf('Atom cannot be negative. (%d)',$size));
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$this->size = $size;
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$this->filename = $filename;
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$this->cache = collect();
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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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// Create time is in the MOOV/MVHD atom
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case 'creation_date':
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case 'duration':
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case 'preferred_rate':
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case 'preferred_volume':
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$subatom = $this->find_atoms(mvhd::class,1);
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return $subatom->{$key};
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// Height is in the moov/trak/tkhd atom
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case 'height':
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// Width is in the moov/trak/tkhd atom
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case 'width':
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$atom = $this->find_atoms(trak::class);
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return $atom->map(fn($item)=>$item->{$key})
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->filter()
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->max();
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// We need to pass our file handle requests to our parent
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case 'fh':
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return parent::__get($key);
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default:
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throw new \Exception('Unknown key: '.$key);
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}
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}
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} |