61 lines
1.6 KiB
PHP
61 lines
1.6 KiB
PHP
<?php
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namespace App\Media\MSVideo\Containers\rlist;
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// https://cdn.hackaday.io/files/274271173436768/avi.pdf
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use Illuminate\Support\Arr;
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use App\Media\MSVideo\Container;
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class strh extends Container
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{
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protected const unpack = [
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'type'=>['a4',4], // FCC type
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'handler'=>['a4',4], // FourCC of codec to be used
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'flags'=>['a4',4],
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'priority'=>['v',2],
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'language'=>['v',2],
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'init_frames'=>['V',4], // Number of the First block of the stream that is present in the file.
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'scale'=>['V',4],
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'rate'=>['V',4],
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'start'=>['V',4], // Start time of stream.
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'length'=>['V',4], // Size of stream in units as defined in dwRate and dwScale
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'buffer_size'=>['V',4], // Size of Buffer necessary to store blocks of that stream. Can be 0 (in that case the application has to guess)
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'quality'=>['V',4],
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'sample_size'=>['V',4], // number of bytes of one stream atom
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'frame'=>['V',4],
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];
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public function __construct(int $offset,int $size,string $filename,bool $be,?string $data)
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{
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parent::__construct($offset,$size,$filename,$be,$data);
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$this->cache = $this->cache($data);
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$this->type = Arr::get($this->cache,'type');
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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 'audio_samplerate':
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case 'video_framerate':
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return Arr::get($this->cache,'rate') / Arr::get($this->cache,'scale',1);
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case 'audio_codec':
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case 'video_codec':
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return Arr::get($this->cache,'handler');
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case 'duration':
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return Arr::get($this->cache,'length');
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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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} |