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File: includes/getid3/module.audio-video.nsv.php

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  Classes of Karl Holz  >  WaldScan  >  includes/getid3/module.audio-video.nsv.php  >  Download  
File: includes/getid3/module.audio-video.nsv.php
Role: Auxiliary script
Content type: text/plain
Description: getID3 dependency
Class: WaldScan
Scan directories for files with certain extensions
Author: By
Last change:
Date: 1 year ago
Size: 9,032 bytes
 

Contents

Class file image Download
<?php
/////////////////////////////////////////////////////////////////
/// getID3() by James Heinrich <info@getid3.org>               //
//  available at http://getid3.sourceforge.net                 //
//            or http://www.getid3.org                         //
/////////////////////////////////////////////////////////////////
// See readme.txt for more details                             //
/////////////////////////////////////////////////////////////////
//                                                             //
// module.audio.nsv.php                                        //
// module for analyzing Nullsoft NSV files                     //
// dependencies: NONE                                          //
//                                                            ///
/////////////////////////////////////////////////////////////////


class getid3_nsv extends getid3_handler
{

    function 
Analyze() {
        
$info = &$this->getid3->info;

        
fseek($this->getid3->fp$info['avdataoffset'], SEEK_SET);
        
$NSVheader fread($this->getid3->fp4);

        switch (
$NSVheader) {
            case 
'NSVs':
                if (
$this->getNSVsHeaderFilepointer(0)) {
                    
$info['fileformat']          = 'nsv';
                    
$info['audio']['dataformat'] = 'nsv';
                    
$info['video']['dataformat'] = 'nsv';
                    
$info['audio']['lossless']   = false;
                    
$info['video']['lossless']   = false;
                }
                break;

            case 
'NSVf':
                if (
$this->getNSVfHeaderFilepointer(0)) {
                    
$info['fileformat']          = 'nsv';
                    
$info['audio']['dataformat'] = 'nsv';
                    
$info['video']['dataformat'] = 'nsv';
                    
$info['audio']['lossless']   = false;
                    
$info['video']['lossless']   = false;
                    
$this->getNSVsHeaderFilepointer($info['nsv']['NSVf']['header_length']);
                }
                break;

            default:
                
$info['error'][] = 'Expecting "NSVs" or "NSVf" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($NSVheader).'"';
                return 
false;
                break;
        }

        if (!isset(
$info['nsv']['NSVf'])) {
            
$info['warning'][] = 'NSVf header not present - cannot calculate playtime or bitrate';
        }

        return 
true;
    }

    function 
getNSVsHeaderFilepointer($fileoffset) {
        
$info = &$this->getid3->info;
        
fseek($this->getid3->fp$fileoffsetSEEK_SET);
        
$NSVsheader fread($this->getid3->fp28);
        
$offset 0;

        
$info['nsv']['NSVs']['identifier']      =                  substr($NSVsheader$offset4);
        
$offset += 4;

        if (
$info['nsv']['NSVs']['identifier'] != 'NSVs') {
            
$info['error'][] = 'expected "NSVs" at offset ('.$fileoffset.'), found "'.$info['nsv']['NSVs']['identifier'].'" instead';
            unset(
$info['nsv']['NSVs']);
            return 
false;
        }

        
$info['nsv']['NSVs']['offset']          = $fileoffset;

        
$info['nsv']['NSVs']['video_codec']     =                              substr($NSVsheader$offset4);
        
$offset += 4;
        
$info['nsv']['NSVs']['audio_codec']     =                              substr($NSVsheader$offset4);
        
$offset += 4;
        
$info['nsv']['NSVs']['resolution_x']    = getid3_lib::LittleEndian2Int(substr($NSVsheader$offset2));
        
$offset += 2;
        
$info['nsv']['NSVs']['resolution_y']    = getid3_lib::LittleEndian2Int(substr($NSVsheader$offset2));
        
$offset += 2;

        
$info['nsv']['NSVs']['framerate_index'] = getid3_lib::LittleEndian2Int(substr($NSVsheader$offset1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown1b']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown1c']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown1d']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown2a']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown2b']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown2c']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;
        
//$info['nsv']['NSVs']['unknown2d']       = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 1));
        
$offset += 1;

        switch (
$info['nsv']['NSVs']['audio_codec']) {
            case 
'PCM ':
                
$info['nsv']['NSVs']['bits_channel'] = getid3_lib::LittleEndian2Int(substr($NSVsheader$offset1));
                
$offset += 1;
                
$info['nsv']['NSVs']['channels']     = getid3_lib::LittleEndian2Int(substr($NSVsheader$offset1));
                
$offset += 1;
                
$info['nsv']['NSVs']['sample_rate']  = getid3_lib::LittleEndian2Int(substr($NSVsheader$offset2));
                
$offset += 2;

                
$info['audio']['sample_rate']        = $info['nsv']['NSVs']['sample_rate'];
                break;

            case 
'MP3 ':
            case 
'NONE':
            default:
                
//$info['nsv']['NSVs']['unknown3']     = getid3_lib::LittleEndian2Int(substr($NSVsheader, $offset, 4));
                
$offset += 4;
                break;
        }

        
$info['video']['resolution_x']       = $info['nsv']['NSVs']['resolution_x'];
        
$info['video']['resolution_y']       = $info['nsv']['NSVs']['resolution_y'];
        
$info['nsv']['NSVs']['frame_rate']   = $this->NSVframerateLookup($info['nsv']['NSVs']['framerate_index']);
        
$info['video']['frame_rate']         = $info['nsv']['NSVs']['frame_rate'];
        
$info['video']['bits_per_sample']    = 24;
        
$info['video']['pixel_aspect_ratio'] = (float) 1;

        return 
true;
    }

    function 
getNSVfHeaderFilepointer($fileoffset$getTOCoffsets=false) {
        
$info = &$this->getid3->info;
        
fseek($this->getid3->fp$fileoffsetSEEK_SET);
        
$NSVfheader fread($this->getid3->fp28);
        
$offset 0;

        
$info['nsv']['NSVf']['identifier']    =                  substr($NSVfheader$offset4);
        
$offset += 4;

        if (
$info['nsv']['NSVf']['identifier'] != 'NSVf') {
            
$info['error'][] = 'expected "NSVf" at offset ('.$fileoffset.'), found "'.$info['nsv']['NSVf']['identifier'].'" instead';
            unset(
$info['nsv']['NSVf']);
            return 
false;
        }

        
$info['nsv']['NSVs']['offset']        = $fileoffset;

        
$info['nsv']['NSVf']['header_length'] = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
        
$offset += 4;
        
$info['nsv']['NSVf']['file_size']     = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
        
$offset += 4;

        if (
$info['nsv']['NSVf']['file_size'] > $info['avdataend']) {
            
$info['warning'][] = 'truncated file - NSVf header indicates '.$info['nsv']['NSVf']['file_size'].' bytes, file actually '.$info['avdataend'].' bytes';
        }

        
$info['nsv']['NSVf']['playtime_ms']   = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
        
$offset += 4;
        
$info['nsv']['NSVf']['meta_size']     = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
        
$offset += 4;
        
$info['nsv']['NSVf']['TOC_entries_1'] = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
        
$offset += 4;
        
$info['nsv']['NSVf']['TOC_entries_2'] = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
        
$offset += 4;

        if (
$info['nsv']['NSVf']['playtime_ms'] == 0) {
            
$info['error'][] = 'Corrupt NSV file: NSVf.playtime_ms == zero';
            return 
false;
        }

        
$NSVfheader .= fread($this->getid3->fp$info['nsv']['NSVf']['meta_size'] + ($info['nsv']['NSVf']['TOC_entries_1']) + ($info['nsv']['NSVf']['TOC_entries_2']));
        
$NSVfheaderlength strlen($NSVfheader);
        
$info['nsv']['NSVf']['metadata']      =                  substr($NSVfheader$offset$info['nsv']['NSVf']['meta_size']);
        
$offset += $info['nsv']['NSVf']['meta_size'];

        if (
$getTOCoffsets) {
            
$TOCcounter 0;
            while (
$TOCcounter $info['nsv']['NSVf']['TOC_entries_1']) {
                if (
$TOCcounter $info['nsv']['NSVf']['TOC_entries_1']) {
                    
$info['nsv']['NSVf']['TOC_1'][$TOCcounter] = getid3_lib::LittleEndian2Int(substr($NSVfheader$offset4));
                    
$offset += 4;
                    
$TOCcounter++;
                }
            }
        }

        if (
trim($info['nsv']['NSVf']['metadata']) != '') {
            
$info['nsv']['NSVf']['metadata'] = str_replace('`'"\x01"$info['nsv']['NSVf']['metadata']);
            
$CommentPairArray explode("\x01".' '$info['nsv']['NSVf']['metadata']);
            foreach (
$CommentPairArray as $CommentPair) {
                if (
strstr($CommentPair'='."\x01")) {
                    list(
$key$value) = explode('='."\x01"$CommentPair2);
                    
$info['nsv']['comments'][strtolower($key)][] = trim(str_replace("\x01"''$value));
                }
            }
        }

        
$info['playtime_seconds'] = $info['nsv']['NSVf']['playtime_ms'] / 1000;
        
$info['bitrate']          = ($info['nsv']['NSVf']['file_size'] * 8) / $info['playtime_seconds'];

        return 
true;
    }


    static function 
NSVframerateLookup($framerateindex) {
        if (
$framerateindex <= 127) {
            return (float) 
$framerateindex;
        }
        static 
$NSVframerateLookup = array();
        if (empty(
$NSVframerateLookup)) {
            
$NSVframerateLookup[129] = (float) 29.970;
            
$NSVframerateLookup[131] = (float) 23.976;
            
$NSVframerateLookup[133] = (float) 14.985;
            
$NSVframerateLookup[197] = (float) 59.940;
            
$NSVframerateLookup[199] = (float) 47.952;
        }
        return (isset(
$NSVframerateLookup[$framerateindex]) ? $NSVframerateLookup[$framerateindex] : false);
    }

}


?>