<?php
/*
* This file is part of PHP-FFmpeg.
*
* (c) Alchemy <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FFMpeg\Media;
use Alchemy\BinaryDriver\Exception\ExecutionFailureException;
use FFMpeg\Exception\InvalidArgumentException;
use FFMpeg\Filters\Waveform\WaveformFilterInterface;
use FFMpeg\Filters\Waveform\WaveformFilters;
use FFMpeg\Driver\FFMpegDriver;
use FFMpeg\FFProbe;
use FFMpeg\Exception\RuntimeException;
class Waveform extends AbstractMediaType
{
const DEFAULT_COLOR = '#000000';
/** @var Video */
protected $audio;
protected $width;
protected $height;
/**
* @var array
*/
protected $colors;
public function __construct(Audio $audio, FFMpegDriver $driver, FFProbe $ffprobe, $width, $height, $colors = array(self::DEFAULT_COLOR))
{
parent::__construct($audio->getPathfile(), $driver, $ffprobe);
$this->audio = $audio;
$this->width = $width;
$this->height = $height;
$this->setColors($colors);
}
/**
* Returns the audio related to the waveform.
*
* @return Audio
*/
public function getAudio()
{
return $this->audio;
}
/**
* {@inheritdoc}
*
* @return WaveformFilters
*/
public function filters()
{
return new WaveformFilters($this);
}
/**
* {@inheritdoc}
*
* @return Waveform
*/
public function addFilter(WaveformFilterInterface $filter)
{
$this->filters->add($filter);
return $this;
}
/**
* Parameter should be an array containing at least one valid color represented as a HTML color string. For
* example #FFFFFF or #000000. By default the color is set to black. Keep in mind that if you save the waveform
* as jpg file, it will appear completely black and to avoid this you can set the waveform color to white (#FFFFFF).
* Saving waveforms to png is strongly suggested.
*
* @param array $colors
*/
public function setColors(array $colors)
{
foreach ($colors as $row => $value)
{
if (!preg_match('/^#(?:[0-9a-fA-F]{6})$/', $value))
{
//invalid color
//unset($colors[$row]);
throw new InvalidArgumentException("The provided color '$value' is invalid");
}
}
if (count($colors))
{
$this->colors = $colors;
}
}
/**
* Returns an array of colors that will be passed to ffmpeg to use for waveform generation. Colors are applied ONLY
* to the waveform. Background cannot be controlled that easily and it is probably easier to save the waveform
* as a transparent png file and then add background of choice.
*
* @return array
*/
public function getColors()
{
return $this->colors;
}
/**
* Compiles the selected colors into a string, using a pipe separator.
*
* @return string
*/
protected function compileColors()
{
return implode('|', $this->colors);
}
/**
* Saves the waveform in the given filename.
*
* @param string $pathfile
*
* @return Waveform
*
* @throws RuntimeException
*/
public function save($pathfile)
{
/**
* might be optimized with http://ffmpeg.org/trac/ffmpeg/wiki/Seeking%20with%20FFmpeg
* @see http://ffmpeg.org/ffmpeg.html#Main-options
*/
$commands = array(
'-y', '-i', $this->pathfile, '-filter_complex',
'showwavespic=colors='.$this->compileColors().':s='.$this->width.'x'.$this->height,
'-frames:v', '1'
);
foreach ($this->filters as $filter) {
$commands = array_merge($commands, $filter->apply($this));
}
$commands = array_merge($commands, array($pathfile));
try {
$this->driver->command($commands);
} catch (ExecutionFailureException $e) {
$this->cleanupTemporaryFile($pathfile);
throw new RuntimeException('Unable to save waveform', $e->getCode(), $e);
}
return $this;
}
}