From 9eabae58420ecb3cc289d6d7ff4c2414f9c63370 Mon Sep 17 00:00:00 2001
From: Minteck <minteck@phoenixnet.tech>
Date: Sun, 31 Oct 2021 12:30:56 +0100
Subject: Initial commit

---
 includes/getid3/module.audio.rkau.php | 102 ++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 includes/getid3/module.audio.rkau.php

(limited to 'includes/getid3/module.audio.rkau.php')

diff --git a/includes/getid3/module.audio.rkau.php b/includes/getid3/module.audio.rkau.php
new file mode 100644
index 0000000..8bbacd4
--- /dev/null
+++ b/includes/getid3/module.audio.rkau.php
@@ -0,0 +1,102 @@
+<?php
+
+/////////////////////////////////////////////////////////////////
+/// getID3() by James Heinrich <info@getid3.org>               //
+//  available at https://github.com/JamesHeinrich/getID3       //
+//            or https://www.getid3.org                        //
+//            or http://getid3.sourceforge.net                 //
+//  see readme.txt for more details                            //
+/////////////////////////////////////////////////////////////////
+//                                                             //
+// module.audio.shorten.php                                    //
+// module for analyzing Shorten Audio files                    //
+// dependencies: NONE                                          //
+//                                                            ///
+/////////////////////////////////////////////////////////////////
+
+if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
+	exit;
+}
+
+class getid3_rkau extends getid3_handler
+{
+	/**
+	 * @return bool
+	 */
+	public function Analyze() {
+		$info = &$this->getid3->info;
+
+		$this->fseek($info['avdataoffset']);
+		$RKAUHeader = $this->fread(20);
+		$magic = 'RKA';
+		if (substr($RKAUHeader, 0, 3) != $magic) {
+			$this->error('Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($RKAUHeader, 0, 3)).'"');
+			return false;
+		}
+
+		$info['fileformat']            = 'rkau';
+		$info['audio']['dataformat']   = 'rkau';
+		$info['audio']['bitrate_mode'] = 'vbr';
+
+		$info['rkau']['raw']['version']   = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 3, 1));
+		$info['rkau']['version']          = '1.'.str_pad($info['rkau']['raw']['version'] & 0x0F, 2, '0', STR_PAD_LEFT);
+		if (($info['rkau']['version'] > 1.07) || ($info['rkau']['version'] < 1.06)) {
+			$this->error('This version of getID3() ['.$this->getid3->version().'] can only parse RKAU files v1.06 and 1.07 (this file is v'.$info['rkau']['version'].')');
+			unset($info['rkau']);
+			return false;
+		}
+
+		$info['rkau']['source_bytes']     = getid3_lib::LittleEndian2Int(substr($RKAUHeader,  4, 4));
+		$info['rkau']['sample_rate']      = getid3_lib::LittleEndian2Int(substr($RKAUHeader,  8, 4));
+		$info['rkau']['channels']         = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 12, 1));
+		$info['rkau']['bits_per_sample']  = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 13, 1));
+
+		$info['rkau']['raw']['quality']   = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 14, 1));
+		$this->RKAUqualityLookup($info['rkau']);
+
+		$info['rkau']['raw']['flags']            = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 15, 1));
+		$info['rkau']['flags']['joint_stereo']   = !($info['rkau']['raw']['flags'] & 0x01);
+		$info['rkau']['flags']['streaming']      =  (bool)  ($info['rkau']['raw']['flags'] & 0x02);
+		$info['rkau']['flags']['vrq_lossy_mode'] =  (bool)  ($info['rkau']['raw']['flags'] & 0x04);
+
+		if ($info['rkau']['flags']['streaming']) {
+			$info['avdataoffset'] += 20;
+			$info['rkau']['compressed_bytes']  = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 16, 4));
+		} else {
+			$info['avdataoffset'] += 16;
+			$info['rkau']['compressed_bytes'] = $info['avdataend'] - $info['avdataoffset'] - 1;
+		}
+		// Note: compressed_bytes does not always equal what appears to be the actual number of compressed bytes,
+		// sometimes it's more, sometimes less. No idea why(?)
+
+		$info['audio']['lossless']        = $info['rkau']['lossless'];
+		$info['audio']['channels']        = $info['rkau']['channels'];
+		$info['audio']['bits_per_sample'] = $info['rkau']['bits_per_sample'];
+		$info['audio']['sample_rate']     = $info['rkau']['sample_rate'];
+
+		$info['playtime_seconds']         = $info['rkau']['source_bytes'] / ($info['rkau']['sample_rate'] * $info['rkau']['channels'] * ($info['rkau']['bits_per_sample'] / 8));
+		$info['audio']['bitrate']         = ($info['rkau']['compressed_bytes'] * 8) / $info['playtime_seconds'];
+
+		return true;
+
+	}
+
+	/**
+	 * @param array $RKAUdata
+	 *
+	 * @return bool
+	 */
+	public function RKAUqualityLookup(&$RKAUdata) {
+		$level   = ($RKAUdata['raw']['quality'] & 0xF0) >> 4;
+		$quality =  $RKAUdata['raw']['quality'] & 0x0F;
+
+		$RKAUdata['lossless']          = (($quality == 0) ? true : false);
+		$RKAUdata['compression_level'] = $level + 1;
+		if (!$RKAUdata['lossless']) {
+			$RKAUdata['quality_setting'] = $quality;
+		}
+
+		return true;
+	}
+
+}
-- 
cgit