module.audio.mp3.php

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			} elseif (isset($KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']])) {

				$encoder_options = $KnownEncoderValues['**'][$thisfile_mpeg_audio_lame['vbr_quality']][$thisfile_mpeg_audio_lame['raw']['vbr_method']][$thisfile_mpeg_audio_lame['raw']['noise_shaping']][$thisfile_mpeg_audio_lame['raw']['stereo_mode']][$thisfile_mpeg_audio_lame['ath_type']][$thisfile_mpeg_audio_lame['lowpass_frequency']];

			} elseif ($ThisFileInfo['audio']['bitrate_mode'] == 'vbr') {

				// http://gabriel.mp3-tech.org/mp3infotag.html
				// int    Quality = (100 - 10 * gfp->VBR_q - gfp->quality)h


				$LAME_V_value = 10 - ceil($thisfile_mpeg_audio_lame['vbr_quality'] / 10);
				$LAME_q_value = 100 - $thisfile_mpeg_audio_lame['vbr_quality'] - ($LAME_V_value * 10);
				$encoder_options = '-V'.$LAME_V_value.' -q'.$LAME_q_value;

			} elseif ($ThisFileInfo['audio']['bitrate_mode'] == 'cbr') {

				$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']).ceil($ThisFileInfo['audio']['bitrate'] / 1000);

			} else {

				$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']);

			}

		} elseif (!empty($thisfile_mpeg_audio_lame['bitrate_abr'])) {

			$encoder_options = 'ABR'.$thisfile_mpeg_audio_lame['bitrate_abr'];

		} elseif (!empty($ThisFileInfo['audio']['bitrate'])) {

			if ($ThisFileInfo['audio']['bitrate_mode'] == 'cbr') {
				$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']).ceil($ThisFileInfo['audio']['bitrate'] / 1000);
			} else {
				$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']);
			}

		}
		if (!empty($thisfile_mpeg_audio_lame['bitrate_min'])) {
			$encoder_options .= ' -b'.$thisfile_mpeg_audio_lame['bitrate_min'];
		}

		if (@$thisfile_mpeg_audio_lame['encoding_flags']['nogap_prev'] || @$thisfile_mpeg_audio_lame['encoding_flags']['nogap_next']) {
			$encoder_options .= ' --nogap';
		}

		if (!empty($thisfile_mpeg_audio_lame['lowpass_frequency'])) {
			$ExplodedOptions = explode(' ', $encoder_options, 4);
			if ($ExplodedOptions[0] == '--r3mix') {
				$ExplodedOptions[1] = 'r3mix';
			}
			switch ($ExplodedOptions[0]) {
				case '--preset':
				case '--alt-preset':
				case '--r3mix':
					if ($ExplodedOptions[1] == 'fast') {
						$ExplodedOptions[1] .= ' '.$ExplodedOptions[2];
					}
					switch ($ExplodedOptions[1]) {
						case 'portable':
						case 'medium':
						case 'standard':
						case 'extreme':
						case 'insane':
						case 'fast portable':
						case 'fast medium':
						case 'fast standard':
						case 'fast extreme':
						case 'fast insane':
						case 'r3mix':
							static $ExpectedLowpass = array(
									'insane|20500'        => 20500,
									'insane|20600'        => 20600,  // 3.90.2, 3.90.3, 3.91
									'medium|18000'        => 18000,
									'fast medium|18000'   => 18000,
									'extreme|19500'       => 19500,  // 3.90,   3.90.1, 3.92, 3.95
									'extreme|19600'       => 19600,  // 3.90.2, 3.90.3, 3.91, 3.93.1
									'fast extreme|19500'  => 19500,  // 3.90,   3.90.1, 3.92, 3.95
									'fast extreme|19600'  => 19600,  // 3.90.2, 3.90.3, 3.91, 3.93.1
									'standard|19000'      => 19000,
									'fast standard|19000' => 19000,
									'r3mix|19500'         => 19500,  // 3.90,   3.90.1, 3.92
									'r3mix|19600'         => 19600,  // 3.90.2, 3.90.3, 3.91
									'r3mix|18000'         => 18000); // 3.94,   3.95
							if (!isset($ExpectedLowpass[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio_lame['lowpass_frequency']])) {
								$encoder_options .= ' --lowpass '.$thisfile_mpeg_audio_lame['lowpass_frequency'];
							}
							break;

						default:
							break;
					}
					break;
			}
		}

		if (isset($thisfile_mpeg_audio_lame['raw']['source_sample_freq'])) {
			if (($thisfile_mpeg_audio['sample_rate'] == 44100) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 1)) {
				$encoder_options .= ' --resample 44100';
			} elseif (($thisfile_mpeg_audio['sample_rate'] == 48000) && ($thisfile_mpeg_audio_lame['raw']['source_sample_freq'] != 2)) {
				$encoder_options .= ' --resample 48000';
			} elseif ($thisfile_mpeg_audio['sample_rate'] < 44100) {
				switch ($thisfile_mpeg_audio_lame['raw']['source_sample_freq']) {
					case 0: // <= 32000
						// may or may not be same as source frequency - ignore
						break;
					case 1: // 44100
					case 2: // 48000
					case 3: // 48000+
						$ExplodedOptions = explode(' ', $encoder_options, 4);
						switch ($ExplodedOptions[0]) {
							case '--preset':
							case '--alt-preset':
								switch ($ExplodedOptions[1]) {
									case 'fast':
									case 'portable':
									case 'medium':
									case 'standard':
									case 'extreme':
									case 'insane':
										$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
										break;

									default:
										static $ExpectedResampledRate = array(
												'phon+/lw/mw-eu/sw|16000' => 16000,
												'mw-us|24000'             => 24000, // 3.95
												'mw-us|32000'             => 32000, // 3.93
												'mw-us|16000'             => 16000, // 3.92
												'phone|16000'             => 16000,
												'phone|11025'             => 11025, // 3.94a15
												'radio|32000'             => 32000, // 3.94a15
												'fm/radio|32000'          => 32000, // 3.92
												'fm|32000'                => 32000, // 3.90
												'voice|32000'             => 32000);
										if (!isset($ExpectedResampledRate[$ExplodedOptions[1].'|'.$thisfile_mpeg_audio['sample_rate']])) {
											$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
										}
										break;
								}
								break;

							case '--r3mix':
							default:
								$encoder_options .= ' --resample '.$thisfile_mpeg_audio['sample_rate'];
								break;
						}
						break;
				}
			}
		}
		if (empty($encoder_options) && !empty($ThisFileInfo['audio']['bitrate']) && !empty($ThisFileInfo['audio']['bitrate_mode'])) {
			//$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']).ceil($ThisFileInfo['audio']['bitrate'] / 1000);
			$encoder_options = strtoupper($ThisFileInfo['audio']['bitrate_mode']);
		}

		return $encoder_options;
	}


	function decodeMPEGaudioHeader($fd, $offset, &$ThisFileInfo, $recursivesearch=true, $ScanAsCBR=false, $FastMPEGheaderScan=false) {

		static $MPEGaudioVersionLookup;
		static $MPEGaudioLayerLookup;
		static $MPEGaudioBitrateLookup;
		static $MPEGaudioFrequencyLookup;
		static $MPEGaudioChannelModeLookup;
		static $MPEGaudioModeExtensionLookup;
		static $MPEGaudioEmphasisLookup;
		if (empty($MPEGaudioVersionLookup)) {
			$MPEGaudioVersionLookup       = getid3_mp3::MPEGaudioVersionArray();
			$MPEGaudioLayerLookup         = getid3_mp3::MPEGaudioLayerArray();
			$MPEGaudioBitrateLookup       = getid3_mp3::MPEGaudioBitrateArray();
			$MPEGaudioFrequencyLookup     = getid3_mp3::MPEGaudioFrequencyArray();
			$MPEGaudioChannelModeLookup   = getid3_mp3::MPEGaudioChannelModeArray();
			$MPEGaudioModeExtensionLookup = getid3_mp3::MPEGaudioModeExtensionArray();
			$MPEGaudioEmphasisLookup      = getid3_mp3::MPEGaudioEmphasisArray();
		}

		if ($offset >= $ThisFileInfo['avdataend']) {
			$ThisFileInfo['error'][] = 'end of file encounter looking for MPEG synch';
			return false;
		}
		fseek($fd, $offset, SEEK_SET);
		//$headerstring = fread($fd, 1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame
		$headerstring = fread($fd, 226); // LAME header at offset 36 + 190 bytes of Xing/LAME data

		// MP3 audio frame structure:
		// $aa $aa $aa $aa [$bb $bb] $cc...
		// where $aa..$aa is the four-byte mpeg-audio header (below)
		// $bb $bb is the optional 2-byte CRC
		// and $cc... is the audio data

		$head4 = substr($headerstring, 0, 4);

		static $MPEGaudioHeaderDecodeCache = array();
		if (isset($MPEGaudioHeaderDecodeCache[$head4])) {
			$MPEGheaderRawArray = $MPEGaudioHeaderDecodeCache[$head4];
		} else {
			$MPEGheaderRawArray = getid3_mp3::MPEGaudioHeaderDecode($head4);
			$MPEGaudioHeaderDecodeCache[$head4] = $MPEGheaderRawArray;
		}

		static $MPEGaudioHeaderValidCache = array();

		// Not in cache
		if (!isset($MPEGaudioHeaderValidCache[$head4])) {
			//$MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGheaderRawArray, false, true);  // allow badly-formatted freeformat (from LAME 3.90 - 3.93.1)
			$MPEGaudioHeaderValidCache[$head4] = getid3_mp3::MPEGaudioHeaderValid($MPEGheaderRawArray, false, false);
		}

		// shortcut
		if (!isset($ThisFileInfo['mpeg']['audio'])) {
			$ThisFileInfo['mpeg']['audio'] = array();
		}
		$thisfile_mpeg_audio = &$ThisFileInfo['mpeg']['audio'];


		if ($MPEGaudioHeaderValidCache[$head4]) {
			$thisfile_mpeg_audio['raw'] = $MPEGheaderRawArray;
		} else {
			$ThisFileInfo['error'][] = 'Invalid MPEG audio header at offset '.$offset;
			return false;
		}

		if (!$FastMPEGheaderScan) {

			$thisfile_mpeg_audio['version']       = $MPEGaudioVersionLookup[$thisfile_mpeg_audio['raw']['version']];
			$thisfile_mpeg_audio['layer']         = $MPEGaudioLayerLookup[$thisfile_mpeg_audio['raw']['layer']];

			$thisfile_mpeg_audio['channelmode']   = $MPEGaudioChannelModeLookup[$thisfile_mpeg_audio['raw']['channelmode']];
			$thisfile_mpeg_audio['channels']      = (($thisfile_mpeg_audio['channelmode'] == 'mono') ? 1 : 2);
			$thisfile_mpeg_audio['sample_rate']   = $MPEGaudioFrequencyLookup[$thisfile_mpeg_audio['version']][$thisfile_mpeg_audio['raw']['sample_rate']];
			$thisfile_mpeg_audio['protection']    = !$thisfile_mpeg_audio['raw']['protection'];
			$thisfile_mpeg_audio['private']       = (bool) $thisfile_mpeg_audio['raw']['private'];
			$thisfile_mpeg_audio['modeextension'] = $MPEGaudioModeExtensionLookup[$thisfile_mpeg_audio['layer']][$thisfile_mpeg_audio['raw']['modeextension']];
			$thisfile_mpeg_audio['copyright']     = (bool) $thisfile_mpeg_audio['raw']['copyright'];
			$thisfile_mpeg_audio['original']      = (bool) $thisfile_mpeg_audio['raw']['original'];
			$thisfile_mpeg_audio['emphasis']      = $MPEGaudioEmphasisLookup[$thisfile_mpeg_audio['raw']['emphasis']];

			$ThisFileInfo['audio']['channels']    = $thisfile_mpeg_audio['channels'];