Add Audio and Video interfaces

src/FFMpeg/Format/DefaultVideoFormat.php

@@ -0,0 +1,124 @@
+<?php
+
+namespace FFMpeg\Format;
+
+abstract class DefaultVideoFormat extends DefaultAudioFormat implements VideoFormat
+{
+
+    protected $width;
+    protected $height;
+    protected $frameRate = 25;
+    protected $videoCodec;
+    protected $GOPsize   = 25;
+
+    public function __construct($width, $height)
+    {
+        $this->setDimensions($width, $height);
+    }
+
+    public function getWidth()
+    {
+        return $this->width;
+    }
+
+    public function getHeight()
+    {
+        return $this->height;
+    }
+
+    public function setDimensions($width, $height)
+    {
+        if ($width < 1)
+        {
+            throw new \InvalidArgumentException('Wrong width value');
+        }
+        if ($height < 1)
+        {
+            throw new \InvalidArgumentException('Wrong height value');
+        }
+
+        $this->width = $this->getMultiple($width, 16);
+        $this->height = $this->getMultiple($height, 16);
+
+        return;
+    }
+
+    public function getFrameRate()
+    {
+        return $this->frameRate;
+    }
+
+    public function setFrameRate($frameRate)
+    {
+        if ($frameRate < 1)
+        {
+            throw new \InvalidArgumentException('Wrong framerate value');
+        }
+
+        $this->frameRate = (int) $frameRate;
+    }
+
+    public function getVideoCodec()
+    {
+        return $this->videoCodec;
+    }
+
+    public function setVideoCodec($videoCodec)
+    {
+        if ( ! in_array($videoCodec, $this->getAvailableVideoCodecs()))
+        {
+            throw new \InvalidArgumentException('Wrong videocodec value');
+        }
+
+        $this->videoCodec = $videoCodec;
+    }
+
+    public function getGOPsize()
+    {
+        return $this->GOPsize;
+    }
+
+    public function setGOPsize($GOPsize)
+    {
+        if ($GOPsize < 1)
+        {
+            throw new \InvalidArgumentException('Wrong GOP size value');
+        }
+
+        $this->GOPsize = (int) $GOPsize;
+    }
+
+    protected function getMultiple($value, $multiple)
+    {
+        $modulo = $value % $multiple;
+
+        $ret = (int) $multiple;
+
+        $halfDistance = $multiple / 2;
+        if ($modulo <= $halfDistance)
+            $bound        = 'bottom';
+        else
+            $bound        = 'top';
+
+        switch ($bound)
+        {
+            default:
+            case 'top':
+                $ret = $value + $multiple - $modulo;
+                break;
+            case 'bottom':
+                $ret = $value - $modulo;
+                break;
+        }
+
+        if ($ret < $multiple)
+        {
+            $ret = (int) $multiple;
+        }
+
+        return (int) $ret;
+    }
+
+    abstract protected function getAvailableVideoCodecs();
+
+}