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