add mp3 audio thumbnail generator

Zotlabs/Thumbs/Mp3audio.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Zotlabs\Thumbs;
+
+use ID3Parser\ID3Parser;
+
+class Mp3audio {
+
+	function Match($type) {
+		return(($type === 'audio/mpeg') ? true : false );
+	}
+
+	function Thumb($attach,$preview_style,$height = 300, $width = 300) {
+		$p = newID3Parser();
+
+        $id = $p->analyze(dbunescbin($attach['content']));
+
+        $photo = isset($id['id3v2']['APIC'][0]['data']) ? $id['id3v2']['APIC'][0]['data'] : null;
+        if(is_null($photo) && isset($id['id3v2']['PIC'][0]['data'])) {
+            $photo = $id['id3v2']['PIC'][0]['data'];
+        }
+
+        if($photo) {
+			$image = imagecreatefromstring($photo);
+			$dest = imagecreatetruecolor( $width, $height );
+	        $srcwidth = imagesx($image);
+    	    $srcheight = imagesy($image);
+
+        	imagealphablending($dest, false);
+			imagesavealpha($dest, true);
+        	imagecopyresampled($dest, $image, 0, 0, 0, 0, $width, $height, $srcwidth, $srcheight);
+            imagedestroy($image);
+			imagejpeg($dest,dbunescbin($attach['content']) . '.thumb');
+		}
+	}
+}
+