scratch – Blame information for rev
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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 115 | office | 1 | <?php |
| 2 | |||
| 3 | /* |
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| 4 | * This file is part of PHP-FFmpeg. |
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| 5 | * |
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| 6 | * (c) Alchemy <info@alchemy.fr> |
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| 7 | * |
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| 8 | * For the full copyright and license information, please view the LICENSE |
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| 9 | * file that was distributed with this source code. |
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| 10 | */ |
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| 11 | |||
| 12 | namespace FFMpeg\FFProbe\DataMapping; |
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| 13 | |||
| 14 | use FFMpeg\Exception\LogicException; |
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| 15 | use FFMpeg\Exception\RuntimeException; |
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| 16 | use FFMpeg\Coordinate\Dimension; |
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| 17 | |||
| 18 | class Stream extends AbstractData |
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| 19 | { |
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| 20 | /** |
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| 21 | * Returns true if the stream is an audio stream. |
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| 22 | * |
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| 23 | * @return Boolean |
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| 24 | */ |
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| 25 | public function isAudio() |
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| 26 | { |
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| 27 | return $this->get('codec_type') === 'audio'; |
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| 28 | } |
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| 29 | |||
| 30 | /** |
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| 31 | * Returns true if the stream is a video stream. |
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| 32 | * |
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| 33 | * @return Boolean |
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| 34 | */ |
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| 35 | public function isVideo() |
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| 36 | { |
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| 37 | return $this->get('codec_type') === 'video'; |
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| 38 | } |
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| 39 | |||
| 40 | /** |
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| 41 | * Returns the dimension of the video stream. |
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| 42 | * |
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| 43 | * @return Dimension |
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| 44 | * |
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| 45 | * @throws LogicException In case the stream is not a video stream. |
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| 46 | * @throws RuntimeException In case the dimensions can not be extracted. |
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| 47 | */ |
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| 48 | public function getDimensions() |
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| 49 | { |
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| 50 | if (!$this->isVideo()) { |
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| 51 | throw new LogicException('Dimensions can only be retrieved from video streams.'); |
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| 52 | } |
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| 53 | |||
| 54 | $sampleRatio = $displayRatio = null; |
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| 55 | |||
| 56 | $width = $this->get('width'); |
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| 57 | $height = $this->get('height'); |
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| 58 | |||
| 59 | if (null !== $ratio = $this->extractRatio($this, 'sample_aspect_ratio')) { |
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| 60 | $sampleRatio = $ratio; |
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| 61 | } |
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| 62 | if (null !== $ratio = $this->extractRatio($this, 'display_aspect_ratio')) { |
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| 63 | $displayRatio = $ratio; |
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| 64 | } |
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| 65 | |||
| 66 | if (null === $height || null === $width) { |
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| 67 | throw new RuntimeException('Unable to extract dimensions.'); |
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| 68 | } |
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| 69 | |||
| 70 | if (null !== $displayRatio && null !== $sampleRatio) { |
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| 71 | if ($sampleRatio[0] !== 1 && $sampleRatio[1] !== 1) { |
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| 72 | if (null !== $width && null !== $height) { |
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| 73 | // stretch video according to pixel sample aspect ratio |
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| 74 | $width = round($width * ($sampleRatio[0] / $sampleRatio[1])); |
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| 75 | // set height according to display aspect ratio |
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| 76 | $height = round($width * ($displayRatio[1] / $displayRatio[0])); |
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| 77 | } |
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| 78 | } |
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| 79 | } |
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| 80 | |||
| 81 | return new Dimension($width, $height); |
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| 82 | } |
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| 83 | |||
| 84 | /** |
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| 85 | * Extracts a ratio from a string in a \d+:\d+ format given a key name. |
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| 86 | * |
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| 87 | * @param Stream $stream The stream where to look for the ratio. |
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| 88 | * @param string $name the name of the key. |
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| 89 | * @return null|array An array containing the width and the height, null if not found. |
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| 90 | */ |
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| 91 | private function extractRatio(Stream $stream, $name) |
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| 92 | { |
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| 93 | if (!$stream->has($name)) { |
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| 94 | return; |
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| 95 | } |
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| 96 | |||
| 97 | $ratio = $stream->get($name); |
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| 98 | if (preg_match('/\d+:\d+/', $ratio)) { |
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| 99 | $data = array_filter(explode(':', $ratio), function ($int) { |
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| 100 | return $int > 0; |
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| 101 | }); |
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| 102 | if (2 === count($data)) { |
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| 103 | return array_map(function ($int) { return (int) $int; }, $data); |
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| 104 | } |
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| 105 | } |
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| 106 | } |
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| 107 | } |