mirror of
https://github.com/Poniverse/Pony.fm.git
synced 2024-11-25 22:47:59 +01:00
94 lines
No EOL
4.2 KiB
PHP
94 lines
No EOL
4.2 KiB
PHP
<?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.shorten.php //
|
|
// module for analyzing Shorten Audio files //
|
|
// dependencies: NONE //
|
|
// ///
|
|
/////////////////////////////////////////////////////////////////
|
|
|
|
|
|
class getid3_rkau extends getid3_handler
|
|
{
|
|
|
|
function Analyze() {
|
|
$info = &$this->getid3->info;
|
|
|
|
fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
|
|
$RKAUHeader = fread($this->getid3->fp, 20);
|
|
$magic = 'RKA';
|
|
if (substr($RKAUHeader, 0, 3) != $magic) {
|
|
$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes(substr($RKAUHeader, 0, 3)).'"';
|
|
return false;
|
|
}
|
|
|
|
$info['fileformat'] = 'rkau';
|
|
$info['audio']['dataformat'] = 'rkau';
|
|
$info['audio']['bitrate_mode'] = 'vbr';
|
|
|
|
$info['rkau']['raw']['version'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 3, 1));
|
|
$info['rkau']['version'] = '1.'.str_pad($info['rkau']['raw']['version'] & 0x0F, 2, '0', STR_PAD_LEFT);
|
|
if (($info['rkau']['version'] > 1.07) || ($info['rkau']['version'] < 1.06)) {
|
|
$info['error'][] = 'This version of getID3() ['.$this->getid3->version().'] can only parse RKAU files v1.06 and 1.07 (this file is v'.$info['rkau']['version'].')';
|
|
unset($info['rkau']);
|
|
return false;
|
|
}
|
|
|
|
$info['rkau']['source_bytes'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 4, 4));
|
|
$info['rkau']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 8, 4));
|
|
$info['rkau']['channels'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 12, 1));
|
|
$info['rkau']['bits_per_sample'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 13, 1));
|
|
|
|
$info['rkau']['raw']['quality'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 14, 1));
|
|
$this->RKAUqualityLookup($info['rkau']);
|
|
|
|
$info['rkau']['raw']['flags'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 15, 1));
|
|
$info['rkau']['flags']['joint_stereo'] = (bool) (!($info['rkau']['raw']['flags'] & 0x01));
|
|
$info['rkau']['flags']['streaming'] = (bool) ($info['rkau']['raw']['flags'] & 0x02);
|
|
$info['rkau']['flags']['vrq_lossy_mode'] = (bool) ($info['rkau']['raw']['flags'] & 0x04);
|
|
|
|
if ($info['rkau']['flags']['streaming']) {
|
|
$info['avdataoffset'] += 20;
|
|
$info['rkau']['compressed_bytes'] = getid3_lib::LittleEndian2Int(substr($RKAUHeader, 16, 4));
|
|
} else {
|
|
$info['avdataoffset'] += 16;
|
|
$info['rkau']['compressed_bytes'] = $info['avdataend'] - $info['avdataoffset'] - 1;
|
|
}
|
|
// Note: compressed_bytes does not always equal what appears to be the actual number of compressed bytes,
|
|
// sometimes it's more, sometimes less. No idea why(?)
|
|
|
|
$info['audio']['lossless'] = $info['rkau']['lossless'];
|
|
$info['audio']['channels'] = $info['rkau']['channels'];
|
|
$info['audio']['bits_per_sample'] = $info['rkau']['bits_per_sample'];
|
|
$info['audio']['sample_rate'] = $info['rkau']['sample_rate'];
|
|
|
|
$info['playtime_seconds'] = $info['rkau']['source_bytes'] / ($info['rkau']['sample_rate'] * $info['rkau']['channels'] * ($info['rkau']['bits_per_sample'] / 8));
|
|
$info['audio']['bitrate'] = ($info['rkau']['compressed_bytes'] * 8) / $info['playtime_seconds'];
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
function RKAUqualityLookup(&$RKAUdata) {
|
|
$level = ($RKAUdata['raw']['quality'] & 0xF0) >> 4;
|
|
$quality = $RKAUdata['raw']['quality'] & 0x0F;
|
|
|
|
$RKAUdata['lossless'] = (($quality == 0) ? true : false);
|
|
$RKAUdata['compression_level'] = $level + 1;
|
|
if (!$RKAUdata['lossless']) {
|
|
$RKAUdata['quality_setting'] = $quality;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|
|
|
|
?>
|