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Файл: fo/classAudioFile.php
Строк: 527
<?

class AudioFile
{
    var 
$wave_id;
    var 
$wave_type;
    var 
$wave_compression;
    var 
$wave_channels;
    var 
$wave_framerate;
    var 
$wave_byterate;
    var 
$wave_bits;
    var 
$wave_size;
    var 
$wave_filename;
    var 
$wave_length;

    var 
$id3_tag;
    var 
$id3_title;
    var 
$id3_artist;
    var 
$id3_album;
    var 
$id3_year;
    var 
$id3_comment;
    var 
$id3_genre;

    var 
$visual_graph_color;    // HTML-Style: "#rrggbb"
    
var $visual_background_color;
    var 
$visual_grid_color;
    var 
$visual_border_color;
    var 
$visual_grid;        // true/false
    
var $visual_border;        // true/false
    
var $visual_width;        // width in pixel
    
var $visual_height;        // height in pixel
    
var $visual_graph_mode;        // 0|1
    
var $visual_fileformat;        // "jpeg","png", everything & else default = "png"

    // ************************************************************************
    // mp3info extracts the attributes of mp3-files
    // (code contributed by reto gassmann (gassi@gassi.cx)
    // ************************************************************************

    
function mp3info()
    {
        
$byte             = array();
        
$version         = array("MPEG Version 2.5",false,"MPEG Version 2 (ISO/IEC 13818-3)","MPEG Version 1 (ISO/IEC 11172-3)");
        
$version_bitrate    = array(1,false,1,0);
        
$version_sampling    = array(2,false,1,0);
        
$layer            = array(false,"Layer III","Layer II","Layer I");
        
$layer_bitrate        = array(false,2,1,0);
        
$layer_lengt        = array(false,1,1,0);
        
$protection         = array("Protected by CRC (16bit crc follows header)","Not protected");
        
$byterate        = array(
                        array(
                            array(
"free",32,64,96,128,160,192,224,256,288,320,352,384,416,448,"bad"),
                            array(
"free",32,48,56648096,112,128,160,192,224,256,320,384,"bad"),
                            array(
"free",32,40,4856648096,112,128,160,192,224,256,320,"bad")
                             ),
                        array(
                            array(
"free",32,48,56648096,112,128,144,160,176,192,224,256,"bad"),
                            array(
"free"8,16,2432404856648096,112,128,144,160,"bad"),
                            array(
"free"8,16,2432404856648096,112,128,144,160,"bad")
                             )
                           );
        
$samplingrate        = array(
                        array(
44100,48000,32000,false),
                        array(
22050,24000,16000,false),
                        array(
11025,120008000,false)
                           );
        
$cannel_mode    = array("Stereo","Joint stereo (Stereo)","Dual channel (Stereo)","Single channel (Mono)");
        
$copyright    = array("Audio is not copyrighted","Audio is copyrighted ");
        
$original    = array("Copy of original media","Original media");
        
$emphasis    = array("none","50/15 ms",false,"CCIT J.17 ");

    
//id3-stuff

    
$genre            = array
                    (
"Blues","Classic Rock","Country","Dance","Disco","Funk","Grunge","Hip-Hop","Jazz","Metal","New Age","Oldies","Other","Pop","R&B",
                    
"Rap","Reggae","Rock","Techno","Industrial","Alternative","Ska","Death Metal","Pranks","Soundtrack","Euro-Techno","Ambient","Trip-Hop",
                    
"Vocal","Jazz+Funk","Fusion","Trance","Classical","Instrumental","Acid","House","Game","Sound Clip","Gospel","Noise","Alternative Rock",
                    
"Bass","Soul","Punk","Space","Meditative","Instrumental Pop","Instrumental Rock","Ethnic","Gothic","Darkwave","Techno-Industrial",
                    
"Electronic","Pop-Folk","Eurodance","Dream","Southern Rock","Comedy","Cult","Gangsta","Top 40","Christian Rap","Pop/Funk","Jungle",
                    
"Native US","Cabaret","New Wave","Psychadelic","Rave","Showtunes","Trailer","Lo-Fi","Tribal","Acid Punk","Acid Jazz","Polka","Retro",
                    
"Musical","Rock & Roll","Hard Rock","Folk","Folk-Rock","National Folk","Swing","Fast Fusion","Bebob","Latin","Revival","Celtic","Bluegrass",
                    
"Avantgarde","Gothic Rock","Progressive Rock","Psychedelic Rock","Symphonic Rock","Slow Rock","Big Band","Chorus","Easy Listening","Acoustic",
                    
"Humour","Speech","Chanson","Opera","Chamber Music","Sonata","Symphony","Booty Bass","Primus","Porn Groove","Satire","Slow Jam","Club",
                    
"Tango","Samba","Folklore","Ballad","Power Ballad","Rhytmic Soul","Freestyle","Duet","Punk Rock","Drum Solo","Acapella","Euro-House",
                    
"Dance Hall","Goa","Drum & Bass","Club-House","Hardcore","Terror","Indie","BritPop","Negerpunk","Polsk Punk","Beat","Christian Gangsta Rap",
                    
"Heavy Metal","Black Metal","Crossover","Contemporary Christian","Christian Rock","Merengue","Salsa","Trash Metal","Anime","Jpop","Synthpop");

    
//id3v2 check----------------------------

        
$footer 0;
        
$header 0;
        
$v1tag    0;
        
$fp fopen($this->wave_filename,"r");
        
$tmp fread($fp,3);
        if(
$tmp == "ID3")
        {
            
$tmp     ord(fread($fp,1));
            
$tmp2     ord(fread($fp,1));
            
$info["mpeg_id3v2_tag"]["version"] = "ID3v2.".$tmp.".".$tmp2;
            
$tmp     ord(fread($fp,1));
            if(
$tmp 128)$info["mpeg_id3v2_tag"]["flag"]["unsync"] = "set";
            if(
$tmp 64$info["mpeg_id3v2_tag"]["flag"]["extended"] = "set";
            if(
$tmp 32$info["mpeg_id3v2_tag"]["flag"]["experimental"] = "set";
            if(
$tmp 16)
            {
                
$info["mpeg_id3v2_tag"]["flag"]["footer"] = "set";
                
$footer 10;
            }
            
$tmp     ord(fread($fp,1))& 127;
            
$tmp2     ord(fread($fp,1))& 127;
            
$tmp3    ord(fread($fp,1))& 127;
            
$tmp4     ord(fread($fp,1))& 127;
            
$info["mpeg_id3v2_tag"]["header_lenght"] = ($tmp 2097152) + ($tmp2 16384) + ($tmp3 128) + $tmp4 10 $footer;
            
fseek ($fp,$info["mpeg_id3v2_tag"]["header_lenght"]);
            
$header $info["mpeg_id3v2_tag"]["header_lenght"];
        } else {
            
fseek ($fp,0);
            
$info["mpeg_id3v2_tag"] = false;
        }

        for (
$x=0;$x<4;$x++)
        {
            
$byte[$x] = ord(fread($fp,1));
        }
        
fseek ($fp, -128 ,SEEK_END);
        
$TAG fread($fp,128);
        
fclose($fp);

    
//id tag?-------------------------------

        
if(substr($TAG,0,3) == "TAG")
        {
            
$v1tag 128;
            
$info["mpeg_id3v1_tag"]["title"]     = substr($TAG,3,30);
            
$info["mpeg_id3v1_tag"]["artist"]     = substr($TAG,33,30);
            
$info["mpeg_id3v1_tag"]["album"]     = substr($TAG,63,30);
            
$info["mpeg_id3v1_tag"]["year"]     = substr($TAG,93,4);
            
$info["mpeg_id3v1_tag"]["comment"]     = substr($TAG,97,30);
            
$info["mpeg_id3v1_tag"]["genre"]    = "";
            
$tmp ord(substr($TAG,127,1));
            if(
$tmp count($genre))
            {
                
$info["mpeg_id3v1_tag"]["genre"] = $genre[$tmp];
            }
        } else {
            
$info["mpeg_id3v1_tag"] = false;
        }

    
//version-------------------------------

        
$tmp $byte[1] & 24;
        
$tmp $tmp >> 3;
        
$info_i["mpeg_version"] = $tmp;
        
$byte_v $version_bitrate[$tmp];
        
$byte_vs $version_sampling[$tmp];
        
$info["mpeg_version"] = $version[$tmp];

    
//layer---------------------------------

        
$tmp $byte[1] & 6;
        
$tmp $tmp >> 1;
        
$info_i["mpeg_layer"] = $tmp;
        
$byte_l $layer_bitrate[$tmp];
        
$byte_len $layer_lengt[$tmp];
        
$info["mpeg_layer"] = $layer[$tmp];

    
//bitrate-------------------------------

        
$tmp $byte[2] & 240;
        
$tmp $tmp >> 4;
        
$info_i["mpeg_bitrate"] = $tmp;
        
$info["mpeg_bitrate"] = $byterate[$byte_v][$byte_l][$tmp]." Кбит/сек.";

    
//samplingrate--------------------------

        
$tmp $byte[2] & 12;
        
$tmp $tmp >> 2;
        
$info["mpeg_sampling_rate"] = $samplingrate[$byte_vs][$tmp];

    
//protection----------------------------

        
$tmp $byte[1] & 1;
        
$info["mpeg_protection"] = $protection[$tmp];

    
//paddingbit----------------------------

        
$tmp $byte[2] & 2;
        
$tmp $tmp >> 1;
        
$byte_pad $tmp;
        
$info["mpeg_padding_bit"] = $tmp;

    
//privatebit----------------------------

        
$tmp $byte[2] & 1;
        
$byte_prv $tmp;

    
//channel_mode--------------------------

        
$tmp $byte[3] & 192;
        
$tmp $tmp >> 6;
        
$info["mpeg_channel_mode"] = $cannel_mode[$tmp];

    
//copyright-----------------------------

        
$tmp $byte[3] & 8;
        
$tmp $tmp >> 3;
        
$info["mpeg_copyright"] = $copyright[$tmp];

    
//original------------------------------

        
$tmp $byte[3] & 4;
        
$tmp $tmp >> 2;
        
$info["mpeg_original"] = $original[$tmp];

    
//emphasis------------------------------

        
$tmp $byte[3] & 3;
        
$info["mpeg_emphasis"] = $emphasis[$tmp];

    
//framelenght---------------------------

        
if($byte_len == 0)
        {
            
$rate_tmp $info["mpeg_bitrate"] * 1000;
            
$info["mpeg_framelenght"] = (12 $rate_tmp $info["mpeg_sampling_rate"] + $byte_pad) * ;
        } elseif(
$byte_len == 1) {
            
$rate_tmp $info["mpeg_bitrate"] * 1000;
            
$info["mpeg_framelenght"] = 144 $rate_tmp /
            
$info["mpeg_sampling_rate"] + $byte_pad;
        }

    
//duration------------------------------

        
$tmp filesize($this->wave_filename);
        
$tmp $tmp $header $v1tag;

        
$tmp2 0;
        if (
$info["mpeg_bitrate"]<>0)
        {
            
$tmp2 = (($tmp) / 1000) / $info["mpeg_bitrate"];
        }
        
$info["mpeg_frames"]="";
        if (
$info["mpeg_framelenght"]<>0)
        {
            
$info["mpeg_frames"] = floor($tmp/$info["mpeg_framelenght"]);
        }
        
$tmp $tmp 8;
        
$info["mpeg_playtime"]="";
        if (
$rate_tmp<>0)
        {
            
$info["mpeg_playtime"] = $tmp/$rate_tmp;
        }
        
$info["mpeg_playtime"] = $tmp2;

        
// transfer the extracted data into classAudioFile-structure

        
$this->wave_id "MPEG";
        
$this->wave_type $info["mpeg_version"];
        
$this->wave_compression $info["mpeg_layer"];
        
$this->wave_channels $info["mpeg_channel_mode"];
        
$this->wave_framerate $info["mpeg_sampling_rate"];
        
$this->wave_byterate $info["mpeg_bitrate"];
        
$this->wave_bits "n/a";
        
$this->wave_size filesize($this->wave_filename);
        
$this->wave_length $info["mpeg_playtime"];

        
$this->id3_tag $info["mpeg_id3v1_tag"];

        if (
$this->id3_tag)
        {
            
$this->id3_title $info["mpeg_id3v1_tag"]["title"];
            
$this->id3_artist $info["mpeg_id3v1_tag"]["artist"];
            
$this->id3_album $info["mpeg_id3v1_tag"]["album"];
            
$this->id3_year $info["mpeg_id3v1_tag"]["year"];
            
$this->id3_comment $info["mpeg_id3v1_tag"]["comment"];
            
$this->id3_genre $info["mpeg_id3v1_tag"]["genre"];
        }
    }

    
// ************************************************************************
    // longCalc calculates the decimal value of 4 bytes
    // mode = 0 ... b1 is the byte with least value
    // mode = 1 ... b1 is the byte with most value
    // ************************************************************************

    
function longCalc ($b1,$b2,$b3,$b4,$mode)
    {
        
$b1 hexdec(bin2hex($b1));
        
$b2 hexdec(bin2hex($b2));
        
$b3 hexdec(bin2hex($b3));
        
$b4 hexdec(bin2hex($b4));
        if (
$mode == 0)
        {
            return (
$b1 + ($b2*256) + ($b3 65536) + ($b4 16777216));
        } else {
            return (
$b4 + ($b3*256) + ($b2 65536) + ($b1 16777216));
        }
    }

    
// ************************************************************************
    // shortCalc calculates the decimal value of 2 bytes
    // mode = 0 ... b1 is the byte with least value
    // mode = 1 ... b1 is the byte with most value
    // ************************************************************************

    
function shortCalc ($b1,$b2,$mode)
    {
        
$b1 hexdec(bin2hex($b1));
        
$b2 hexdec(bin2hex($b2));
        if (
$mode == 0)
        {
            return (
$b1 + ($b2*256));
        } else {
            return (
$b2 + ($b1*256));
        }
    }

    
// ************************************************************************
    // getCompression delivers a string which identifies the compression-mode
    // of the AudioFile-Object
    // ************************************************************************

    
function getCompression ($id)
    {
        if (
$this->wave_id <> "MPEG")
        {
            
$append "($id)";
            switch (
$id)
            {
                case 
0:  return ("unknown $append"); break;
                case 
1:  return ("pcm/uncompressed $append"); break;
                case 
2:  return ("microsoft adpcm $append"); break;
                case 
6:  return ("itu g.711 a-law $append"); break;
                case 
7:  return ("itu g.711 u-law $append"); break;
                case 
17:   return ("ima adpcm $append"); break;
                case 
20:   return ("itu g.723 adpcm (yamaha) $append"); break;
                case 
49:   return ("gsm 6.10 $append"); break;
                case 
64:   return ("itu g.721 adpcm $append"); break;
                case 
80:   return ("mpeg $append"); break;
                case 
65536:return ("experimental $append"); break;
                default:   return (
"not defined $append"); break;
            }
        } else {
            return (
$id);
        }
    }

    
// ************************************************************************
    // getVisualization creates a graphical visualization of the audio-sample
    //                  (works ONLY * for uncompressed waves!
    //                              * files with 1 or 2 channels
    //                              * 8/16/24/32 bit sample-resolution )
    // ************************************************************************

    
function getVisualization ($output)
    {
        
$width=$this->visual_width;
        
$height=$this->visual_height;
        
$height_channel $height $this->wave_channels;
        if (
$this->wave_filename<>"" && $this->wave_id == "RIFF" && $this->wave_type == "WAVE" && ($this->wave_channels>=&& $this->wave_channels<=2) && $this->wave_bits%8==0)
        {
            
$file fopen ($this->wave_filename,"r");

            
// read the first 12 bytes (RIFF- & WAVE-chunk)

            
for ($i=0;$i<12;$i++)
            {
                
$null fgetc ($file);
            }

            
// Read the next chunk-id, supposed to be "fmt "

            
$chunk_id_3 fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
            if (
$chunk_id_3 == "fmt ")
            {
                
$chunk_size_3 $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                for (
$i=0;$i<$chunk_size_3;$i++)
                {
                    
$null fgetc($file);
                }

                
// Read the next chunk-id, supposed to be "data"
                
$chunk_id_4 "";
                while (
$chunk_id_4 <> "data" && !feof($file))
                {
                    
$chunk_id_4 fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                    if (
$chunk_id_4 <> "data")
                    {
                        
$chunk_size_4 $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                        for (
$i=0;$i<$chunk_size_4;$i++)
                        {
                            
$null fgetc($file);
                        }
                    }
                }
                if (
$chunk_id_4 == "data")
                {
                    
$chunk_size_4 $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                    
$visualData = array();
                    
$bytes_per_frame = ($this->wave_bits/8)*($this->wave_channels);
                    
$bytes_per_channel = ($this->wave_bits/8);
                    
$frames $chunk_size_4 $bytes_per_frame;
                    
$visual_frames ceil($frames $width);
                    
$frame_index 1;
                    
$data_index 1;
                    while (!
feof($file))
                    {
                        for (
$j=0;$j<$this->wave_channels;$j++)
                        {
                            
$bytes = array();
                            for (
$i=0;$i<$bytes_per_channel;$i++)
                            {
                                
$bytes[$i] = fgetc($file);
                            }
                            if (
$frame_index == $visual_frames)
                            {
                                switch (
$bytes_per_channel)
                                {
                                    case 
1$visualData[$j][$data_index]= $this->shortCalc($bytes[0],$bytes[1],0);
                                        break;
                                    case 
2$f=128;
                                        if (
ord($bytes[1])&128$f 0;
                                        
$x=chr((ord($bytes[1])&127) + $f);
                                        
$visualData[$j][$data_index]= floor($this->shortCalc($bytes[0],$x,0)/256);
                                        break;
                                }
                                if ((
$j+1) == $this->wave_channels)
                                {
                                    
$data_index++;
                                    
$frame_index 1;
                                }
                            } else {
                                if ((
$j+1) == $this->wave_channels$frame_index++;
                            }
                        }
                    }
                    
//$im = @ImageCreate ($width, (256*$this->wave_channels)+1) or die ("Cannot Initialize new GD image stream!");
                    
$im = @ImageCreate ($width$height) or die ("Cannot Initialize new GD image stream!");
                    
$background_color ImageColorAllocate ($imhexdec(substr($this->visual_background_color,1,2)),hexdec(substr($this->visual_background_color,3,2)),hexdec(substr($this->visual_background_color,5,2)));
                    
$cBlack ImageColorAllocate ($imhexdec(substr($this->visual_background_color,1,2)),hexdec(substr($this->visual_background_color,3,2)),hexdec(substr($this->visual_background_color,5,2)));
                    
$cGreen ImageColorAllocate ($imhexdec(substr($this->visual_graph_color,1,2)),hexdec(substr($this->visual_graph_color,3,2)),hexdec(substr($this->visual_graph_color,5,2)));
                    
$cRed ImageColorAllocate ($imhexdec(substr($this->visual_border_color,1,2)),hexdec(substr($this->visual_border_color,3,2)),hexdec(substr($this->visual_border_color,5,2)));
                    
$cBlue ImageColorAllocate ($imhexdec(substr($this->visual_grid_color,1,2)),hexdec(substr($this->visual_grid_color,3,2)),hexdec(substr($this->visual_grid_color,5,2)));
                    if (
$this->visual_border)
                    {
                        
ImageRectangle ($im,0,0,($width-1),($height-1),$cRed);
                        for (
$i=0;$i<=$this->wave_channels;$i++)
                        {
                            
ImageLine ($im,1,($i*($height_channel/2))+($height_channel/2),$width,($i*($height_channel/2))+($height_channel/2),$cRed);
                        }
                    }
                    if (
$this->visual_grid)
                    {
                        for (
$i=1;$i<=($width/100*2);$i++)
                        {
                            
ImageLine ($im,$i*50,0,$i*50,(256*$this->wave_channels),$cBlue);
                        }
                    }

                    
// this for-loop draws a graph for every channel

                    
for ($j=0;$j<sizeof($visualData);$j++)
                    {
                        
$last_x 1;
                        
$last_y $height_channel 2;

                        
// this for-loop draws the graphs itself

                        
for ($i=1;$i<sizeof($visualData[$j]);$i++)
                        {
                            
$faktor 128 / ($height_channel 2);
                            
$val $visualData[$j][$i] / $faktor;
                            if (
$this->visual_graph_mode == 0)
                            {
                                
ImageLine ($im,$last_x,($last_y+($j*$height_channel)),$i,($val+($j*$height_channel)),$cGreen);
                            } else {
                                
ImageLine ($im,$i,(($height_channel/2)+($j*$height_channel)),$i,($val+($j*$height_channel)),$cGreen);
                            }
                            
$last_x $i;
                            
$last_y $val;
                        }
                    }

                    
// change this to generate JPG or direct output to browser

                    
if (strtolower($this->visual_fileformat) == "jpeg")
                    {
                        
ImageJpeg ($im,$output);
                    } else {
                        
ImagePng ($im,$output);
                    }
                }
            }
            
fclose ($file);
        } else {
            
// AudioSample - AudioFile-Object not initialized!
        
}
    }

    
// ************************************************************************
    // getSampleInfo extracts the attributes of the AudioFile-Object
    // ************************************************************************

    
function getSampleInfo ()
    {
        
$valid true;

        if (
strstr(strtoupper($this->wave_filename),"MP3"))
        {
            
$this->mp3info ();
        } else {

            
$this->wave_size filesize ($this->wave_filename);
            if (
$this->wave_size 16)
            {
                
$file fopen ($this->wave_filename,"r");
                
$chunk_id fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                
$null fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                
$chunk_id_2 fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                
$this->wave_id $chunk_id;
                
$this->wave_type $chunk_id_2;
                if (
substr($chunk_id,0,2)=="PK")
                {
                    
// it's a ZIP-file

                    
$this->wave_id "ZIP";
                    
$this->wave_type "ZIP";
                    
$this->valid true;
                } else {
                    if (
$this->wave_id == "RIFF" && $this->wave_type == "WAVE")
                    {
                        
// it's a Wave-File

                        
$chunk_id fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                        
$chunk_size $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                        if (
$chunk_id == "fmt ")
                        {
                            
$format_len $chunk_size;
                            
$this->wave_compression $this->shortCalc (fgetc ($file), fgetc ($file),0);
                            
$this->wave_channels $this->shortCalc (fgetc ($file), fgetc ($file),0);
                            
$this->wave_framerate $this->longCalc (fgetc ($file), fgetc ($file), fgetc ($file), fgetc ($file),0);
                            
$this->wave_byterate $this->longCalc (fgetc ($file), fgetc ($file), fgetc ($file), fgetc ($file),0);
                            
$null fgetc($file) . fgetc($file);
                            
$this->wave_bits $this->shortCalc (fgetc ($file), fgetc ($file),0);
                            
$read 16;
                            if (
$read $format_len)
                            {
                                
$extra_bytes $this->shortCalc (fgetc ($file), fgetc ($file),1);
                                
$j 0;
                                while (
$j $extra_bytes && !feof($file))
                                {
                                    
$null fgetc ($file);
                                    
$j++;
                                }
                            }
                            
$chunk_id fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                            
$chunk_size $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                            if (
$chunk_id == "data")
                            {
                                
$this->wave_length = (($chunk_size $this->wave_channels) / ($this->wave_bits/8)) / $this->wave_framerate;
                            } else {
                                while (
$chunk_id <> "data" && !feof($file))
                                {
                                    
$j 1;
                                    while (
$j <= $chunk_size && !feof($file))
                                    {
                                        
$null fgetc ($file);
                                        
$j++;
                                    }
                                    
$chunk_id fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                                    
//print "<br />$chunk_id*";
                                    
$chunk_size $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                                }
                                if (
$chunk_id == "data")
                                {
                                    
$this->wave_length = (($chunk_size $this->wave_channels) / ($this->wave_bits/8)) / $this->wave_framerate;
                                }

                            }
                        } else {
                            
$valid false;
                        }
                    } else {
                        if (
$this->wave_id == "FORM" && $this->wave_type == "AIFF")
                        {
                            
// we have a AIFF file here

                            
$chunk_id fgetc($file) . fgetc($file) . fgetc($file) . fgetc($file);
                            
$chunk_size $this->longCalc (fgetc($file) , fgetc($file) , fgetc($file) , fgetc($file),0);
                            if (
$chunk_id == "COMM")
                            {
                                
$format_len $chunk_size;
                                
$this->wave_channels $this->shortCalc (fgetc ($file), fgetc ($file),1);
                                
$null $this->longCalc (fgetc ($file), fgetc ($file), fgetc ($file), fgetc ($file),1);
                                
$this->wave_bits $this->shortCalc (fgetc ($file), fgetc ($file),1);
                                
$null fgetc ($file) . fgetc ($file);
                                
$this->wave_framerate $this->shortCalc (fgetc ($file), fgetc ($file),1);

                                
$read 16;
                            } else {
                                
$valid false;
                            }
                        } else {
                            
// probably crap

                            
$valid false;
                        }
                    }
                }
                
fclose ($file);
            } else {
                
$valid false;
            }
            return (
$valid);
        }
    }

    
// ************************************************************************
    // printSampleInfo prints the attributes of the AudioFile-Object
    // ************************************************************************

function printSampleInfo()
{
print 
'<strong>Информация о песне:</strong><br />
Каналы: '
.$this->wave_channels.'<br />
Частота: '
.$this->wave_framerate.' Гц<br />
Битрейт: '
.$this->wave_byterate.'<br />
Время: '
.date('i:s'mktime(0,0,round($this->wave_length))).' мин<br />';

if(
$title trim($this->id3_title)){
print 
'Название: '.iconv('windows-1251','UTF-8',$title).'<br />';
}
if(
$artist trim($this->id3_artist)){
print 
'Артист: '.iconv('windows-1251','UTF-8',$artist).'<br />';
}
if(
$album trim($this->id3_album)){
print 
'Альбом: '.iconv('windows-1251','UTF-8',$album).'<br />';
}
if(
$year trim($this->id3_year)){
print 
'Год: '.iconv('windows-1251','UTF-8',$year).'<br />';
}
if(
$genre trim($this->id3_genre)){
print 
'Жанр: '.iconv('windows-1251','UTF-8',$genre).'<br />';
}
if(
$comment trim($this->id3_comment)){
print 
'Комментарий: '.iconv('windows-1251','UTF-8',$comment).'<br />';
}

return;
}

    
// ************************************************************************
    // loadFile initializes the AudioFile-Object
    // ************************************************************************

    
function loadFile ($loadFilename)
    {
        
$this->wave_filename $loadFilename;
        
$this->getSampleInfo ();
        
$this->visual_graph_color "#18F3AD";
        
$this->visual_background_color "#000000";
        
$this->visual_grid_color "#002C4A";
        
$this->visual_border_color "#A52421";
        
$this->visual_grid true;
        
$this->visual_border true;
        
$this->visual_width 600;
        
$this->visual_height 512;
        
$this->visual_graph_mode 1;
        
$this->visual_fileformat "png";
    }
}
?>
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