7abb6d36cbChanged `Boolean` to `bool` to avoid Psalm being confused with a potential class. Thanks @digilist
107 lines
3.1 KiB
PHP
107 lines
3.1 KiB
PHP
<?php
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/*
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* This file is part of PHP-FFmpeg.
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*
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* (c) Alchemy <info@alchemy.fr>
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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 FFMpeg\FFProbe\DataMapping;
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use FFMpeg\Exception\LogicException;
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use FFMpeg\Exception\RuntimeException;
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use FFMpeg\Coordinate\Dimension;
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class Stream extends AbstractData
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{
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/**
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* Returns true if the stream is an audio stream.
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*
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* @return bool
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*/
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public function isAudio()
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{
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return $this->get('codec_type') === 'audio';
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}
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/**
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* Returns true if the stream is a video stream.
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*
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* @return bool
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*/
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public function isVideo()
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{
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return $this->get('codec_type') === 'video';
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}
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/**
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* Returns the dimension of the video stream.
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*
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* @return Dimension
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*
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* @throws LogicException In case the stream is not a video stream.
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* @throws RuntimeException In case the dimensions can not be extracted.
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*/
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public function getDimensions()
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{
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if (!$this->isVideo()) {
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throw new LogicException('Dimensions can only be retrieved from video streams.');
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}
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$sampleRatio = $displayRatio = null;
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$width = $this->get('width');
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$height = $this->get('height');
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if (null !== $ratio = $this->extractRatio($this, 'sample_aspect_ratio')) {
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$sampleRatio = $ratio;
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}
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if (null !== $ratio = $this->extractRatio($this, 'display_aspect_ratio')) {
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$displayRatio = $ratio;
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}
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if (null === $height || null === $width) {
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throw new RuntimeException('Unable to extract dimensions.');
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}
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if (null !== $displayRatio && null !== $sampleRatio) {
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if ($sampleRatio[0] !== 1 && $sampleRatio[1] !== 1) {
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if (null !== $width && null !== $height) {
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// stretch video according to pixel sample aspect ratio
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$width = round($width * ($sampleRatio[0] / $sampleRatio[1]));
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// set height according to display aspect ratio
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$height = round($width * ($displayRatio[1] / $displayRatio[0]));
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}
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}
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}
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return new Dimension($width, $height);
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}
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/**
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* Extracts a ratio from a string in a \d+:\d+ format given a key name.
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*
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* @param Stream $stream The stream where to look for the ratio.
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* @param string $name the name of the key.
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* @return null|array An array containing the width and the height, null if not found.
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*/
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private function extractRatio(Stream $stream, $name)
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{
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if (!$stream->has($name)) {
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return;
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}
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$ratio = $stream->get($name);
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if (preg_match('/\d+:\d+/', $ratio)) {
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$data = array_filter(explode(':', $ratio), function ($int) {
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return $int > 0;
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});
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if (2 === count($data)) {
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return array_map(function ($int) { return (int) $int; }, $data);
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}
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}
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}
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}
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