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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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class HLSPlaylist |
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{ |
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/** @var HLS */ |
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private $hls; |
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private const DEFAULT_AUDIO_BITRATE = 131072; |
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/** |
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* HLSPlaylist constructor. |
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* @param HLS $hls |
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*/ |
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public function __construct(HLS $hls) |
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{ |
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$this->hls = $hls; |
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} |
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/** |
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* @param Representation $rep |
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* @return string |
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*/ |
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private function segmentPath(Representation $rep): string |
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{ |
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return $this->hls->pathInfo(PATHINFO_FILENAME) . "_" . $rep->getHeight() . "p.m3u8"; |
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} |
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/** |
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* @param Representation $rep |
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* @return string |
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*/ |
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private function streamInfo(Representation $rep): string |
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{ |
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$tag = '#EXT-X-STREAM-INF:'; |
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$params = array_merge( |
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[ |
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"BANDWIDTH" => $rep->getKiloBitrate() * 1024 + $this->getAudioBitrate($rep), |
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"RESOLUTION" => $rep->size2string(), |
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"NAME" => "\"" . $rep->getHeight() . "\"" |
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], |
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$rep->getHlsStreamInfo() |
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); |
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Utiles::concatKeyValue($params, "="); |
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return $tag . implode(",", $params); |
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} |
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/** |
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* @return string |
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*/ |
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private function getVersion(): string |
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{ |
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$version = $this->hls->getHlsSegmentType() === "fmp4" ? 7 : 3; |
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return "#EXT-X-VERSION:" . $version; |
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} |
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/** |
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* @param array $description |
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* @return string |
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*/ |
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private function contents(array $description): string |
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{ |
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$content = array_merge(["#EXTM3U", $this->getVersion()], $description); |
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foreach ($this->hls->getRepresentations() as $rep) { |
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array_push($content, $this->streamInfo($rep), $this->segmentPath($rep)); |
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} |
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return implode(PHP_EOL, $content); |
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} |
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/** |
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* @param string $filename |
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* @param array $description |
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*/ |
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public function save(string $filename, array $description): void |
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{ |
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File::put($filename, $this->contents(($description))); |
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} |
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/** |
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* @param Representation $rep |
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* @return int |
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*/ |
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private function getAudioBitrate(Representation $rep): int |
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{ |
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return $rep->getAudioKiloBitrate() ? $rep->getAudioKiloBitrate() * 1024 : $this->getOriginalAudioBitrate(); |
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} |
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/** |
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* @return int |
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*/ |
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private function getOriginalAudioBitrate(): int |
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{ |
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return $this->hls |
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->getMedia() |
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->getStreams() |
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->audios() |
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->first() |
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->get('bit_rate', static::DEFAULT_AUDIO_BITRATE); |
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} |
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} |
aminyazdanpanah /
PHP-FFmpeg-video-streaming
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