1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/e2gallerypro/e2upload/Backend/Assets/getid3/module.audio.avr.php	Mon Feb 22 08:02:39 2010 -0500
     1.3 @@ -0,0 +1,135 @@
     1.4 +<?php
     1.5 +// +----------------------------------------------------------------------+
     1.6 +// | PHP version 5                                                        |
     1.7 +// +----------------------------------------------------------------------+
     1.8 +// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen                 |
     1.9 +// +----------------------------------------------------------------------+
    1.10 +// | This source file is subject to version 2 of the GPL license,         |
    1.11 +// | that is bundled with this package in the file license.txt and is     |
    1.12 +// | available through the world-wide-web at the following url:           |
    1.13 +// | http://www.gnu.org/copyleft/gpl.html                                 |
    1.14 +// +----------------------------------------------------------------------+
    1.15 +// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org    |
    1.16 +// +----------------------------------------------------------------------+
    1.17 +// | Authors: James Heinrich <infoØgetid3*org>                            |
    1.18 +// |          Allan Hansen <ahØartemis*dk>                                |
    1.19 +// +----------------------------------------------------------------------+
    1.20 +// | module.audio.avr.php                                                 |
    1.21 +// | Module for analyzing AVR audio files                                 |
    1.22 +// | dependencies: NONE                                                   |
    1.23 +// +----------------------------------------------------------------------+
    1.24 +//
    1.25 +// $Id: module.audio.avr.php,v 1.2 2006/11/02 10:48:01 ah Exp $
    1.26 +
    1.27 +        
    1.28 +        
    1.29 +class getid3_avr extends getid3_handler
    1.30 +{
    1.31 +
    1.32 +    public function Analyze() {
    1.33 +
    1.34 +        $getid3 = $this->getid3;
    1.35 +        
    1.36 +        // http://cui.unige.ch/OSG/info/AudioFormats/ap11.html
    1.37 +        // http://www.btinternet.com/~AnthonyJ/Atari/programming/avr_format.html
    1.38 +        // offset    type    length    name        comments
    1.39 +        // ---------------------------------------------------------------------
    1.40 +        // 0    char    4    ID        format ID == "2BIT"
    1.41 +        // 4    char    8    name        sample name (unused space filled with 0)
    1.42 +        // 12    short    1    mono/stereo    0=mono, -1 (0xFFFF)=stereo
    1.43 +        //                     With stereo, samples are alternated,
    1.44 +        //                     the first voice is the left :
    1.45 +        //                     (LRLRLRLRLRLRLRLRLR...)
    1.46 +        // 14    short    1    resolution    8, 12 or 16 (bits)
    1.47 +        // 16    short    1    signed or not    0=unsigned, -1 (0xFFFF)=signed
    1.48 +        // 18    short    1    loop or not    0=no loop, -1 (0xFFFF)=loop on
    1.49 +        // 20    short    1    MIDI note    0xFFnn, where 0 <= nn <= 127
    1.50 +        //                     0xFFFF means "no MIDI note defined"
    1.51 +        // 22    byte    1    Replay speed    Frequence in the Replay software
    1.52 +        //                     0=5.485 Khz, 1=8.084 Khz, 2=10.971 Khz,
    1.53 +        //                     3=16.168 Khz, 4=21.942 Khz, 5=32.336 Khz
    1.54 +        //                     6=43.885 Khz, 7=47.261 Khz
    1.55 +        //                     -1 (0xFF)=no defined Frequence
    1.56 +        // 23    byte    3    sample rate    in Hertz
    1.57 +        // 26    long    1    size in bytes (2 * bytes in stereo)
    1.58 +        // 30    long    1    loop begin    0 for no loop
    1.59 +        // 34    long    1    loop size    equal to 'size' for no loop
    1.60 +        // 38  short   2   Reserved, MIDI keyboard split */
    1.61 +        // 40  short   2   Reserved, sample compression */
    1.62 +        // 42  short   2   Reserved */
    1.63 +        // 44  char   20;  Additional filename space, used if (name[7] != 0)
    1.64 +        // 64    byte    64    user data
    1.65 +        // 128    bytes    ?    sample data    (12 bits samples are coded on 16 bits:
    1.66 +        //                     0000 xxxx xxxx xxxx)
    1.67 +        // ---------------------------------------------------------------------
    1.68 +
    1.69 +        // Note that all values are in motorola (big-endian) format, and that long is
    1.70 +        // assumed to be 4 bytes, and short 2 bytes.
    1.71 +        // When reading the samples, you should handle both signed and unsigned data,
    1.72 +        // and be prepared to convert 16->8 bit, or mono->stereo if needed. To convert
    1.73 +        // 8-bit data between signed/unsigned just add 127 to the sample values.
    1.74 +        // Simularly for 16-bit data you should add 32769
    1.75 +
    1.76 +
    1.77 +        // Magic bytes: '2BIT'
    1.78 +
    1.79 +        $getid3->info['avr'] = array ();
    1.80 +        $info_avr = &$getid3->info['avr'];
    1.81 +        
    1.82 +        $getid3->info['fileformat'] = 'avr';
    1.83 +        $info_avr['raw']['magic']   = '2BIT';
    1.84 +
    1.85 +        fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
    1.86 +        $avr_header = fread($getid3->fp, 128);
    1.87 +
    1.88 +        $getid3->info['avdataoffset'] += 128;
    1.89 +
    1.90 +        $info_avr['sample_name']        = rtrim(substr($avr_header,  4,  8));
    1.91 +        
    1.92 +        $info_avr['raw']['mono']        = getid3_lib::BigEndian2Int(substr($avr_header, 12,  2));
    1.93 +        $info_avr['bits_per_sample']    = getid3_lib::BigEndian2Int(substr($avr_header, 14,  2));
    1.94 +        $info_avr['raw']['signed']      = getid3_lib::BigEndian2Int(substr($avr_header, 16,  2));
    1.95 +        $info_avr['raw']['loop']        = getid3_lib::BigEndian2Int(substr($avr_header, 18,  2));
    1.96 +        $info_avr['raw']['midi']        = getid3_lib::BigEndian2Int(substr($avr_header, 20,  2));
    1.97 +        $info_avr['raw']['replay_freq'] = getid3_lib::BigEndian2Int(substr($avr_header, 22,  1));
    1.98 +        $info_avr['sample_rate']        = getid3_lib::BigEndian2Int(substr($avr_header, 23,  3));
    1.99 +        $info_avr['sample_length']      = getid3_lib::BigEndian2Int(substr($avr_header, 26,  4));
   1.100 +        $info_avr['loop_start']         = getid3_lib::BigEndian2Int(substr($avr_header, 30,  4));
   1.101 +        $info_avr['loop_end']           = getid3_lib::BigEndian2Int(substr($avr_header, 34,  4));
   1.102 +        $info_avr['midi_split']         = getid3_lib::BigEndian2Int(substr($avr_header, 38,  2));
   1.103 +        $info_avr['sample_compression'] = getid3_lib::BigEndian2Int(substr($avr_header, 40,  2));
   1.104 +        $info_avr['reserved']           = getid3_lib::BigEndian2Int(substr($avr_header, 42,  2));
   1.105 +        $info_avr['sample_name_extra']  = rtrim(substr($avr_header, 44, 20));
   1.106 +        $info_avr['comment']            = rtrim(substr($avr_header, 64, 64));
   1.107 +
   1.108 +        $info_avr['flags']['stereo']    = (($info_avr['raw']['mono']   == 0) ? false : true);
   1.109 +        $info_avr['flags']['signed']    = (($info_avr['raw']['signed'] == 0) ? false : true);
   1.110 +        $info_avr['flags']['loop']      = (($info_avr['raw']['loop']   == 0) ? false : true);
   1.111 +
   1.112 +        $info_avr['midi_notes'] = array ();
   1.113 +        if (($info_avr['raw']['midi'] & 0xFF00) != 0xFF00) {
   1.114 +            $info_avr['midi_notes'][] = ($info_avr['raw']['midi'] & 0xFF00) >> 8;
   1.115 +        }
   1.116 +        if (($info_avr['raw']['midi'] & 0x00FF) != 0x00FF) {
   1.117 +            $info_avr['midi_notes'][] = ($info_avr['raw']['midi'] & 0x00FF);
   1.118 +        }
   1.119 +
   1.120 +        if (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) != ($info_avr['sample_length'] * (($info_avr['bits_per_sample'] == 8) ? 1 : 2))) {
   1.121 +            $getid3->warning('Probable truncated file: expecting '.($info_avr['sample_length'] * (($info_avr['bits_per_sample'] == 8) ? 1 : 2)).' bytes of audio data, found '.($getid3->info['avdataend'] - $getid3->info['avdataoffset']));
   1.122 +        }
   1.123 +
   1.124 +        $getid3->info['audio']['dataformat']      = 'avr';
   1.125 +        $getid3->info['audio']['lossless']        = true;
   1.126 +        $getid3->info['audio']['bitrate_mode']    = 'cbr';
   1.127 +        $getid3->info['audio']['bits_per_sample'] = $info_avr['bits_per_sample'];
   1.128 +        $getid3->info['audio']['sample_rate']     = $info_avr['sample_rate'];
   1.129 +        $getid3->info['audio']['channels']        = ($info_avr['flags']['stereo'] ? 2 : 1);
   1.130 +        $getid3->info['playtime_seconds']         = ($info_avr['sample_length'] / $getid3->info['audio']['channels']) / $info_avr['sample_rate'];
   1.131 +        $getid3->info['audio']['bitrate']         = ($info_avr['sample_length'] * (($info_avr['bits_per_sample'] == 8) ? 8 : 16)) / $getid3->info['playtime_seconds'];
   1.132 +
   1.133 +        return true;
   1.134 +    }
   1.135 +}
   1.136 +
   1.137 +
   1.138 +?>
   1.139 \ No newline at end of file