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<?php |
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/** |
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* This file is part of the PHP-FFmpeg-video-streaming package. |
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* |
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* (c) Amin Yazdanpanah <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Streaming; |
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use FFMpeg\Driver\FFMpegDriver; |
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use Streaming\Exception\RuntimeException; |
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class HLSKeyInfo |
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{ |
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/** @var string */ |
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private $path; |
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/** @var string */ |
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private $c_path; |
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/** @var string */ |
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private $url; |
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/** @var string */ |
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private $c_url; |
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/** @var string */ |
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private $key_info_path; |
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/** @var string */ |
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private $suffix = ""; |
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/** @var string */ |
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private $search_for; |
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/** @var int */ |
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private $length = 16; |
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/** @var int */ |
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private $key_rotation_period; |
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/** @var array */ |
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private $segments = []; |
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/** |
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* HLSKeyInfo constructor. |
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* @param string $path |
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* @param string $url |
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*/ |
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public function __construct(string $path, string $url) |
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{ |
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$this->path = $this->c_path = $path; |
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$this->url = $this->c_url = $url; |
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File::makeDir(dirname($path)); |
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$this->key_info_path = File::tmp(); |
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} |
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/** |
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* @param string $path |
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* @param string $url |
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* @return HLSKeyInfo |
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*/ |
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public static function create(string $path, string $url): HLSKeyInfo |
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{ |
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return new static($path, $url); |
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} |
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/** |
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* Generate a encryption key |
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*/ |
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public function createKey(): void |
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{ |
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if (!extension_loaded('openssl')) { |
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throw new RuntimeException('OpenSSL is not installed.'); |
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} |
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File::put($this->path, openssl_random_pseudo_bytes($this->length)); |
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} |
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/** |
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* update or generate a key info file |
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*/ |
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public function createKeyInfo(): void |
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{ |
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$content = implode( |
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PHP_EOL, |
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[ |
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$this->url, |
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$this->path, |
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bin2hex(openssl_random_pseudo_bytes($this->length)) |
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] |
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); |
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File::put($this->key_info_path, $content); |
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} |
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/** |
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* @param FFMpegDriver $driver |
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* @param int $key_rotation_period |
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* @param string $search_for |
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*/ |
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public function rotateKey(FFMpegDriver $driver, int $key_rotation_period, string $search_for): void |
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{ |
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$this->key_rotation_period = $key_rotation_period; |
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$this->search_for = $search_for; |
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call_user_func_array([$driver->listen(new FFMpegListener), 'on'], ['listen', $this->call()]); |
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} |
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/** |
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* @return void |
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*/ |
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public function generate(): void |
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{ |
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$this->createKey(); |
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$this->createKeyInfo(); |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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$this->generate(); |
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return $this->key_info_path; |
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} |
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/** |
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* @param string $key_info_path |
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* @return HLSKeyInfo |
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*/ |
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public function setKeyInfoPath(string $key_info_path): HLSKeyInfo |
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{ |
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$this->key_info_path = $key_info_path; |
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return $this; |
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} |
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/** |
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* @param int $length |
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* @return HLSKeyInfo |
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*/ |
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public function setLength(int $length): HLSKeyInfo |
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{ |
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$this->length = $length; |
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return $this; |
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} |
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/** |
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* @param string $suffix |
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* @return HLSKeyInfo |
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*/ |
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public function setSuffix(string $suffix): HLSKeyInfo |
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{ |
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$this->suffix = $suffix; |
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return $this; |
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} |
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/** |
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* update the suffix of paths |
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*/ |
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private function updateSuffix() |
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{ |
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$suffix = uniqid("_") . $this->suffix; |
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$this->path = $this->c_path . $suffix; |
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$this->url = $this->c_url . $suffix; |
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} |
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/** |
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* check if the new segment is created or not |
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* @return callable |
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*/ |
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private function call(): callable |
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{ |
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return function ($log) { |
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if (false !== strpos($log, $this->search_for) && !in_array($log, $this->segments)) { |
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array_push($this->segments, $log); |
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if ($this->key_rotation_period === 1 || (count($this->segments) % $this->key_rotation_period) === 0) { |
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$this->updateSuffix(); |
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$this->generate(); |
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} |
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} |
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}; |
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} |
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} |
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aminyazdanpanah /
PHP-FFmpeg-video-streaming
