alltube/classes/Stream/YoutubeStream.php

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<?php
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/**
* YoutubeStream class.
*/
namespace Alltube\Stream;
use Alltube\Library\Downloader;
use Alltube\Library\Exception\AlltubeLibraryException;
use Alltube\Library\Video;
use GuzzleHttp\Psr7\AppendStream;
/**
* Stream that downloads a video in chunks.
* This is required because Youtube throttles the download speed on chunks larger than 10M.
*/
class YoutubeStream extends AppendStream
{
/**
* YoutubeStream constructor.
*
* @param Downloader $downloader Downloader object
* @param Video $video Video to stream
* @throws AlltubeLibraryException
*/
public function __construct(Downloader $downloader, Video $video)
{
parent::__construct();
$stream = $downloader->getHttpResponse($video);
$contentLenghtHeader = $stream->getHeader('Content-Length');
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$rangeStart = 0;
while ($rangeStart < $contentLenghtHeader[0]) {
$rangeEnd = $rangeStart + $video->downloader_options->http_chunk_size;
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if ($rangeEnd >= $contentLenghtHeader[0]) {
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$rangeEnd = intval($contentLenghtHeader[0]) - 1;
}
$response = $downloader->getHttpResponse($video, ['Range' => 'bytes=' . $rangeStart . '-' . $rangeEnd]);
$this->addStream(new YoutubeChunkStream($response));
$rangeStart = $rangeEnd + 1;
}
}
}