MPEGaudioFrequencyArray example

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

        if ($this->fseek($offset) != 0) {
            $this->error('decodeMPEGaudioHeader() failed to seek to next offset at '.$offset);
            return false;
        }
        //$headerstring = $this->fread(1441); // worst-case max length = 32kHz @ 320kbps layer 3 = 1441 bytes/frame         $headerstring = $this->fread(226); // LAME header at offset 36 + 190 bytes of Xing/LAME data