chrisyue / mala

<?php

/*

 * This file is part of the Mala package.

 *

 * (c) Chrisyue <http://chrisyue.com/>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Chrisyue\Mala;

use Chrisyue\Mala\Manager\MediaSegmentManagerInterface;

use Chrisyue\Mala\Model\ChannelInterface;

use Chrisyue\PhpM3u8\M3u8\M3u8;

use Chrisyue\PhpM3u8\M3u8\Playlist;

class M3u8Generator

{

    private $manager;

    private $options;

    public function __construct(MediaSegmentManagerInterface $manager, array $options = array())

    {

        $this->manager = $manager;

        $this->options = $options + array(

            'version' => 3,

            'target_duration' => 10,

        );

    }

    public function generate(ChannelInterface $channel, \DateTime $startsAt = null)

    {

        $targetDuration = $this->options['target_duration'];

        if (null === $startsAt) {

            $startsAt = new \DateTime();

        }

        $segments = $this->manager->findPlaying($channel, $startsAt, $targetDuration * 3);

        $playlist = new Playlist($segments);

        $first = $playlist->getFirst();

        if (null === $first) {

            return;

        }

        $age = $first->getEndsAt()->getTimestamp() - $startsAt->getTimestamp() + 1;

        $playlist->setAge($age);

        $discontinuitySequence = $first->getProgram()->getSequence();

        if ($first->isDiscontinuity()) {

            --$discontinuitySequence;

        }

        return new M3u8($playlist, $this->options['version'], $targetDuration, $discontinuitySequence);

    }

}