Add DisplayRatioFixer Frame filter

CHANGELOG.md

@@ -4,6 +4,7 @@ CHANGELOG
 * 0.3.3 (xx-xx-2013)
 
   * Add convenient Stream::getDimensions method to extract video dimension.
+  * Add DisplayRatioFixer Frame filter.
 
 * 0.3.2 (08-08-2013)
 

src/FFMpeg/Filters/Frame/DisplayRatioFixerFilter.php

@@ -0,0 +1,58 @@
+<?php
+
+/*
+ * This file is part of PHP-FFmpeg.
+ *
+ * (c) Alchemy <dev.team@alchemy.fr>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace FFMpeg\Filters\Frame;
+
+use FFMpeg\Exception\RuntimeException;
+use FFMpeg\Media\Frame;
+
+class DisplayRatioFixerFilter implements FrameFilterInterface
+{
+    /** @var integer */
+    private $priority;
+
+    public function __construct($priority = 0)
+    {
+        $this->priority = $priority;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getPriority()
+    {
+        return $this->priority;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function apply(Frame $frame)
+    {
+        $dimensions = null;
+        $commands = array();
+
+        foreach ($frame->getVideo()->getStreams() as $stream) {
+            if ($stream->isVideo()) {
+                try {
+                    $dimensions = $stream->getDimensions();
+                    $commands[] = '-s';
+                    $commands[] = $dimensions->getWidth() . 'x' . $dimensions->getHeight();
+                    break;
+                } catch (RuntimeException $e) {
+
+                }
+            }
+        }
+
+        return $commands;
+    }
+}

tests/FFMpeg/Tests/Filters/Frame/DisplayRatioFixerFilterTest.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace FFMpeg\Tests\Filters\Frame;
+
+use FFMpeg\Tests\TestCase;
+use FFMpeg\Filters\Frame\DisplayRatioFixerFilter;
+use FFMpeg\Media\Frame;
+use FFMpeg\Coordinate\TimeCode;
+use FFMpeg\FFProbe\DataMapping\StreamCollection;
+use FFMpeg\FFProbe\DataMapping\Stream;
+
+class DisplayRatioFixerFilterTest extends TestCase
+{
+    public function testApply()
+    {
+        $stream = new Stream(array('codec_type' => 'video', 'width' => 960, 'height' => 720));
+        $streams = new StreamCollection(array($stream));
+        
+        $video = $this->getVideoMock(__FILE__);
+        $video->expects($this->once())
+                ->method('getStreams')
+                ->will($this->returnValue($streams));
+        
+        $frame = new Frame($video, $this->getFFMpegDriverMock(), $this->getFFProbeMock(), new TimeCode(0, 0, 0, 0));
+        $filter = new DisplayRatioFixerFilter();
+        $this->assertEquals(array('-s', '960x720'), $filter->apply($frame));
+    }
+}