added support for retrieving progress information via helpers

tests/src/FFMpeg/Progress/ProgressTest.php

@@ -0,0 +1,70 @@
+<?php
+use FFMpeg\Helper\AudioProgressHelper;
+use FFMpeg\FFMpegTest;
+use FFMpeg\Format\Audio\Mp3;
+use FFMpeg\Helper\VideoProgressHelper;
+
+class ProgressTest extends FFMpegTest
+{
+    /**
+     * @covers FFMpeg\Helper\ProgressHelper::parseProgress
+     * @covers FFMpeg\Helper\ProgressHelper::convertDuration
+     * @covers FFMpeg\Helper\ProgressHelper::getProgressInfo
+     * @covers FFMpeg\Helper\ProgressHelper::microtimeFloat
+     * @covers FFMpeg\Helper\AudioProgressHelper::getPattern
+     */
+    public function testProgressHelper()
+    {
+        $progressInfo = array();
+
+        $audioProgress = new AudioProgressHelper(function($percent, $remaining, $rate) use ($progressInfo ) {
+            $progressInfo[] = $percent;
+        });
+
+        $dest = __DIR__ . '/../../../files/encode_test.mp3';
+
+        $this->object->open(__DIR__ . '/../../../files/Audio.mp3');
+        $this->object->attachHelper($audioProgress);
+        $this->object->encode(new Mp3(), $dest);
+
+        $this->assertGreaterThanOrEqual(3, $progressInfo);
+    }
+
+    /**
+     * @covers FFMpeg\Helper\AudioProgressHelper::getPattern
+     */
+    public function testAudioProgressHelper()
+    {
+        $audioProgress = new AudioProgressHelper(function($percent, $remaining, $rate) { });
+        $audioProgress->setDuration(500);
+
+        $line = "size=     712kB time=00:00:45.50 bitrate= 128.1kbits/s";
+        $audioProgress->parseProgress($line);
+
+        sleep(1);
+
+        $line = "size=     4712kB time=00:01:45.50 bitrate= 128.1kbits/s";
+        $progress = $audioProgress->parseProgress($line);
+
+        $this->assertEquals('21.0', $progress['percent']);
+    }
+
+    /**
+     * @covers FFMpeg\Helper\VideoProgressHelper::getPattern
+     */
+    public function testVideoProgress()
+    {
+        $videoProgress = new VideoProgressHelper(function($percent, $remaining, $rate) {});
+        $videoProgress->setDuration(500);
+
+        $line = "frame=  206 fps=202 q=10.0 size=     571kB time=00:00:07.12 bitrate= 656.8kbits/s dup=9 drop=0";
+        $videoProgress->parseProgress($line);
+
+        sleep(1);
+
+        $line = "frame=  854 fps=113 q=20.0 size=    4430kB time=00:00:33.04 bitrate=1098.5kbits/s dup=36 drop=0";
+        $progress = $videoProgress->parseProgress($line);
+
+        $this->assertEquals('6.0', $progress['percent']);
+    }
+}