<?php
/*
* This file is part of PHP-FFmpeg.
*
* (c) Strime <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FFMpeg\Filters\Waveform;
use FFMpeg\Exception\RuntimeException;
use FFMpeg\Media\Waveform;
class WaveformDownmixFilter implements WaveformFilterInterface
{
/** @var bool */
private $downmix;
/** @var int */
private $priority;
// By default, the downmix value is set to FALSE.
public function __construct($downmix = false, $priority = 0)
{
$this->downmix = $downmix;
$this->priority = $priority;
}
/**
* {@inheritdoc}
*/
public function getDownmix()
{
return $this->downmix;
}
/**
* {@inheritdoc}
*/
public function getPriority()
{
return $this->priority;
}
/**
* {@inheritdoc}
*/
public function apply(Waveform $waveform)
{
$commands = [];
foreach ($waveform->getAudio()->getStreams() as $stream) {
if ($stream->isAudio()) {
try {
// If the downmix parameter is set to TRUE, we add an option to the FFMPEG command
if (true == $this->downmix) {
$commands[] = '"aformat=channel_layouts=mono"';
}
break;
} catch (RuntimeException $e) {
}
}
}
return $commands;
}
}