Version 0.3

src/FFMpeg/FFProbe/OptionsTester.php

@@ -0,0 +1,64 @@
+<?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;
+
+use Doctrine\Common\Cache\Cache;
+use FFMpeg\Driver\FFProbeDriver;
+
+class OptionsTester implements OptionsTesterInterface
+{
+    /** @var FFProbeDriver */
+    private $ffprobe;
+    /** @var Cache */
+    private $cache;
+
+    public function __construct(FFProbeDriver $ffprobe, Cache $cache)
+    {
+        $this->ffprobe = $ffprobe;
+        $this->cache = $cache;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function has($name)
+    {
+        $id = sprintf('option-%s', $name);
+
+        if ($this->cache->contains($id)) {
+            return $this->cache->fetch($id);
+        }
+
+        $output = $this->retrieveHelpOutput();
+
+        $ret = (Boolean) preg_match('/^'.$name.'/m', $output);
+
+        $this->cache->save($id, $ret);
+
+        return $ret;
+    }
+
+    private function retrieveHelpOutput()
+    {
+        $id = 'help';
+
+        if ($this->cache->contains($id)) {
+            return $this->cache->fetch($id);
+        }
+
+        $output = $this->ffprobe->command(array('-help', '-loglevel', 'quiet'));
+
+        $this->cache->save($id, $output);
+
+        return $output;
+    }
+}