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File: /lib/module.audio.ogg.php

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<?php















getid3_lib
::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php'__FILE__true);

class 
getid3_ogg extends getid3_handler
{

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

$info['fileformat'] = 'ogg';


 if (isset(
$info['id3v2'])) {
$info['warning'][] = 'Illegal ID3v2 tag present.';
}
if (isset(
$info['id3v1'])) {
$info['warning'][] = 'Illegal ID3v1 tag present.';
}
if (isset(
$info['ape'])) {
$info['warning'][] = 'Illegal APE tag present.';
}




$this->fseek($info['avdataoffset']);

$oggpageinfo $this->ParseOggPageHeader();
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

if (
$this->ftell() >= $this->getid3->fread_buffer_size()) {
$info['error'][] = 'Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)';
unset(
$info['fileformat']);
unset(
$info['ogg']);
return 
false;
}

$filedata $this->fread($oggpageinfo['page_length']);
$filedataoffset 0;

if (
substr($filedata04) == 'fLaC') {

$info['audio']['dataformat'] = 'flac';
$info['audio']['bitrate_mode'] = 'vbr';
$info['audio']['lossless'] = true;

} elseif (
substr($filedata16) == 'vorbis') {

$this->ParseVorbisPageHeader($filedata$filedataoffset$oggpageinfo);

} elseif (
substr($filedata08) == 'OpusHead') {

if( 
$this->ParseOpusPageHeader($filedata$filedataoffset$oggpageinfo) == false ) {
return 
false;
}

} elseif (
substr($filedata08) == 'Speex   ') {



$info['audio']['dataformat'] = 'speex';
$info['mime_type'] = 'audio/speex';
$info['audio']['bitrate_mode'] = 'abr';
$info['audio']['lossless'] = false;

$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata$filedataoffset8); 
 
$filedataoffset += 8;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata$filedataoffset20);
$filedataoffset += 20;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;

$info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
$info['speex']['sample_rate'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
$info['speex']['channels'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
$info['speex']['vbr'] = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
$info['speex']['band_type'] = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);

$info['audio']['sample_rate'] = $info['speex']['sample_rate'];
$info['audio']['channels'] = $info['speex']['channels'];
if (
$info['speex']['vbr']) {
$info['audio']['bitrate_mode'] = 'vbr';
}

} elseif (
substr($filedata07) == "\x80".'theora') {



$info['ogg']['pageheader']['theora']['theora_magic'] = substr($filedata$filedataoffset7); 
 
$filedataoffset += 7;
$info['ogg']['pageheader']['theora']['version_major'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader']['theora']['version_minor'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader']['theora']['version_revision'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader']['theora']['frame_width_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset2));
$filedataoffset += 2;
$info['ogg']['pageheader']['theora']['frame_height_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset2));
$filedataoffset += 2;
$info['ogg']['pageheader']['theora']['resolution_x'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset3));
$filedataoffset += 3;
$info['ogg']['pageheader']['theora']['resolution_y'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset3));
$filedataoffset += 3;
$info['ogg']['pageheader']['theora']['picture_offset_x'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader']['theora']['picture_offset_y'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader']['theora']['frame_rate_numerator'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader']['theora']['frame_rate_denominator'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset3));
$filedataoffset += 3;
$info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset3));
$filedataoffset += 3;
$info['ogg']['pageheader']['theora']['color_space_id'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader']['theora']['nominal_bitrate'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset3));
$filedataoffset += 3;
$info['ogg']['pageheader']['theora']['flags'] = getid3_lib::BigEndian2Int(substr($filedata$filedataoffset2));
$filedataoffset += 2;

$info['ogg']['pageheader']['theora']['quality'] = ($info['ogg']['pageheader']['theora']['flags'] & 0xFC00) >> 10;
$info['ogg']['pageheader']['theora']['kfg_shift'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x03E0) >> 5;
$info['ogg']['pageheader']['theora']['pixel_format_id'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0018) >> 3;
$info['ogg']['pageheader']['theora']['reserved'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0007) >> 0
 
$info['ogg']['pageheader']['theora']['color_space'] = self::TheoraColorSpace($info['ogg']['pageheader']['theora']['color_space_id']);
$info['ogg']['pageheader']['theora']['pixel_format'] = self::TheoraPixelFormat($info['ogg']['pageheader']['theora']['pixel_format_id']);

$info['video']['dataformat'] = 'theora';
$info['mime_type'] = 'video/ogg';

 
 
$info['video']['resolution_x'] = $info['ogg']['pageheader']['theora']['resolution_x'];
$info['video']['resolution_y'] = $info['ogg']['pageheader']['theora']['resolution_y'];
if (
$info['ogg']['pageheader']['theora']['frame_rate_denominator'] > 0) {
$info['video']['frame_rate'] = (float) $info['ogg']['pageheader']['theora']['frame_rate_numerator'] / $info['ogg']['pageheader']['theora']['frame_rate_denominator'];
}
if (
$info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] > 0) {
$info['video']['pixel_aspect_ratio'] = (float) $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] / $info['ogg']['pageheader']['theora']['pixel_aspect_denominator'];
}
$info['warning'][] = 'Ogg Theora (v3) not fully supported in this version of getID3 ['.$this->getid3->version().'] -- bitrate, playtime and all audio data are currently unavailable';


} elseif (
substr($filedata08) == "fishead\x00") {


 
 
$filedataoffset += 8;
$info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset2));
$filedataoffset += 2;
$info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset2));
$filedataoffset += 2;
$info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset20));
$filedataoffset += 20;

$info['ogg']['skeleton']['fishead']['version'] = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor'];
$info['ogg']['skeleton']['fishead']['presentationtime'] = $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'];
$info['ogg']['skeleton']['fishead']['basetime'] = $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] / $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'];
$info['ogg']['skeleton']['fishead']['utc'] = $info['ogg']['skeleton']['fishead']['raw']['utc'];


$counter 0;
do {
$oggpageinfo $this->ParseOggPageHeader();
$info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo;
$filedata $this->fread($oggpageinfo['page_length']);
$this->fseek($oggpageinfo['page_end_offset']);

if (
substr($filedata08) == "fisbone\x00") {

$filedataoffset 8;
$info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata$filedataoffset3);
$filedataoffset += 3;

} elseif (
substr($filedata16) == 'theora') {

$info['video']['dataformat'] = 'theora1';
$info['error'][] = 'Ogg Theora (v1) not correctly handled in this version of getID3 ['.$this->getid3->version().']';


} elseif (
substr($filedata16) == 'vorbis') {

$this->ParseVorbisPageHeader($filedata$filedataoffset$oggpageinfo);

} else {
$info['error'][] = 'unexpected';

 }

 } while ((
$oggpageinfo['page_seqno'] == 0) && (substr($filedata08) != "fisbone\x00"));

$this->fseek($oggpageinfo['page_start_offset']);

$info['error'][] = 'Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']';


} else {

$info['error'][] = 'Expecting either "Speex   ", "OpusHead" or "vorbis" identifier strings, found "'.substr($filedata08).'"';
unset(
$info['ogg']);
unset(
$info['mime_type']);
return 
false;

}


 
$oggpageinfo $this->ParseOggPageHeader();
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

switch (
$info['audio']['dataformat']) {
case 
'vorbis':
$filedata $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata01));
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata16); 

$this->ParseVorbisComments();
break;

case 
'flac':
$flac = new getid3_flac($this->getid3);
if (!
$flac->parseMETAdata()) {
$info['error'][] = 'Failed to parse FLAC headers';
return 
false;
}
unset(
$flac);
break;

case 
'speex':
$this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
$this->ParseVorbisComments();
break;

case 
'opus':
$filedata $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata08); 
 if(
substr($filedata08) != 'OpusTags') {
$info['error'][] = 'Expected "OpusTags" as header but got "'.substr($filedata08).'"';
return 
false;
}

$this->ParseVorbisComments();
break;

}


 if (!
getid3_lib::intValueSupported($info['avdataend'])) {

$info['warning'][] = 'Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX 1073741824).'GB)';

} else {

$this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0));
$LastChunkOfOgg strrev($this->fread($this->getid3->fread_buffer_size()));
if (
$LastOggSpostion strpos($LastChunkOfOgg'SggO')) {
$this->fseek($info['avdataend'] - ($LastOggSpostion strlen('SggO')));
$info['avdataend'] = $this->ftell();
$info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader();
$info['ogg']['samples'] = $info['ogg']['pageheader']['eos']['pcm_abs_position'];
if (
$info['ogg']['samples'] == 0) {
$info['error'][] = 'Corrupt Ogg file: eos.number of samples == zero';
return 
false;
}
if (!empty(
$info['audio']['sample_rate'])) {
$info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / ($info['ogg']['samples'] / $info['audio']['sample_rate']);
}
}

}

if (!empty(
$info['ogg']['bitrate_average'])) {
$info['audio']['bitrate'] = $info['ogg']['bitrate_average'];
} elseif (!empty(
$info['ogg']['bitrate_nominal'])) {
$info['audio']['bitrate'] = $info['ogg']['bitrate_nominal'];
} elseif (!empty(
$info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) {
$info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2;
}
if (isset(
$info['audio']['bitrate']) && !isset($info['playtime_seconds'])) {
if (
$info['audio']['bitrate'] == 0) {
$info['error'][] = 'Corrupt Ogg file: bitrate_audio == zero';
return 
false;
}
$info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']);
}

if (isset(
$info['ogg']['vendor'])) {
$info['audio']['encoder'] = preg_replace('/^Encoded with /'''$info['ogg']['vendor']);


 if (
$info['audio']['dataformat'] == 'vorbis') {


 if (
preg_match('/^Xiph.Org/'$info['audio']['encoder'])) {

if (
$info['audio']['bitrate_mode'] == 'abr') {


 
$info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000);

} elseif ((
$info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) {

 
$info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']);

}
}

if (empty(
$info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) {
$info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps';
}
}
}

return 
true;
}

public function 
ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
$info = &$this->getid3->info;
$info['audio']['dataformat'] = 'vorbis';
$info['audio']['lossless'] = false;

$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata$filedataoffset6); 
 
$filedataoffset += 6;
$info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$info['audio']['channels'] = $info['ogg']['numberofchannels'];
$info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
if (
$info['ogg']['samplerate'] == 0) {
$info['error'][] = 'Corrupt Ogg file: sample rate == zero';
return 
false;
}
$info['audio']['sample_rate'] = $info['ogg']['samplerate'];
$info['ogg']['samples'] = 0
 
$info['ogg']['bitrate_average'] = 0
 
$info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$info['ogg']['blocksize_small'] = pow(2getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1)) & 0x0F);
$info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1)) & 0xF0) >> 4);
$info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1)); 

$info['audio']['bitrate_mode'] = 'vbr'
 if (
$info['ogg']['bitrate_max'] == 0xFFFFFFFF) {
unset(
$info['ogg']['bitrate_max']);
$info['audio']['bitrate_mode'] = 'abr';
}
if (
$info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
unset(
$info['ogg']['bitrate_nominal']);
}
if (
$info['ogg']['bitrate_min'] == 0xFFFFFFFF) {
unset(
$info['ogg']['bitrate_min']);
$info['audio']['bitrate_mode'] = 'abr';
}
return 
true;
}


 public function 
ParseOpusPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
$info = &$this->getid3->info;
$info['audio']['dataformat'] = 'opus';
$info['mime_type'] = 'audio/ogg; codecs=opus';


$info['audio']['bitrate_mode'] = 'vbr';

$info['audio']['lossless'] = false;

$info['ogg']['pageheader']['opus']['opus_magic'] = substr($filedata$filedataoffset8); 
 
$filedataoffset += 8;
$info['ogg']['pageheader']['opus']['version'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;

if (
$info['ogg']['pageheader']['opus']['version'] < || $info['ogg']['pageheader']['opus']['version'] > 15) {
$info['error'][] = 'Unknown opus version number (only accepting 1-15)';
return 
false;
}

$info['ogg']['pageheader']['opus']['out_channel_count'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;

if (
$info['ogg']['pageheader']['opus']['out_channel_count'] == 0) {
$info['error'][] = 'Invalid channel count in opus header (must not be zero)';
return 
false;
}

$info['ogg']['pageheader']['opus']['pre_skip'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset2));
$filedataoffset += 2;

$info['ogg']['pageheader']['opus']['sample_rate'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;


 


 

$info['opus']['opus_version'] = $info['ogg']['pageheader']['opus']['version'];
$info['opus']['sample_rate'] = $info['ogg']['pageheader']['opus']['sample_rate'];
$info['opus']['out_channel_count'] = $info['ogg']['pageheader']['opus']['out_channel_count'];

$info['audio']['channels'] = $info['opus']['out_channel_count'];
$info['audio']['sample_rate'] = $info['opus']['sample_rate'];
return 
true;
}


public function 
ParseOggPageHeader() {

 
$oggheader['page_start_offset'] = $this->ftell(); 

$filedata $this->fread($this->getid3->fread_buffer_size());
$filedataoffset 0;
while ((
substr($filedata$filedataoffset++, 4) != 'OggS')) {
if ((
$this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) {

 return 
false;
}
if (((
$filedataoffset 28) > strlen($filedata)) || (strlen($filedata) < 28)) {
if (
$this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === false)) {

 return 
false;
}
}
}
$filedataoffset += strlen('OggS') - 1

$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); 
 
$oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); 
 
$oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); 

$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset8));
$filedataoffset += 8;
$oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset4));
$filedataoffset += 4;
$oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$oggheader['page_length'] = 0;
for (
$i 0$i $oggheader['page_segments']; $i++) {
$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata$filedataoffset1));
$filedataoffset += 1;
$oggheader['page_length'] += $oggheader['segment_table'][$i];
}
$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
$oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];
$this->fseek($oggheader['header_end_offset']);

return 
$oggheader;
}


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

$OriginalOffset $this->ftell();
$commentdataoffset 0;
$VorbisCommentPage 1;

switch (
$info['audio']['dataformat']) {
case 
'vorbis':
case 
'speex':
case 
'opus':
$CommentStartOffset $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; 
 
$this->fseek($CommentStartOffset);
$commentdataoffset 27 $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
$commentdata $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);

if (
$info['audio']['dataformat'] == 'vorbis') {
$commentdataoffset += (strlen('vorbis') + 1);
}
else if (
$info['audio']['dataformat'] == 'opus') {
$commentdataoffset += strlen('OpusTags');
}

break;

case 
'flac':
$CommentStartOffset $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4;
$this->fseek($CommentStartOffset);
$commentdata $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']);
break;

default:
return 
false;
}

$VendorSize getid3_lib::LittleEndian2Int(substr($commentdata$commentdataoffset4));
$commentdataoffset += 4;

$info['ogg']['vendor'] = substr($commentdata$commentdataoffset$VendorSize);
$commentdataoffset += $VendorSize;

$CommentsCount getid3_lib::LittleEndian2Int(substr($commentdata$commentdataoffset4));
$commentdataoffset += 4;
$info['avdataoffset'] = $CommentStartOffset $commentdataoffset;

$basicfields = array('TITLE''ARTIST''ALBUM''TRACKNUMBER''GENRE''DATE''DESCRIPTION''COMMENT');
$ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw'];
for (
$i 0$i $CommentsCount$i++) {

if (
$i >= 10000) {

 
$info['warning'][] = 'Unexpectedly large number ('.$CommentsCount.') of Ogg comments - breaking after reading '.$i.' comments';
break;
}

$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset $commentdataoffset;

if (
$this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) {
if (
$oggpageinfo $this->ParseOggPageHeader()) {
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;

$VorbisCommentPage++;


 
$AsYetUnusedData substr($commentdata$commentdataoffset);


 
$commentdata substr($commentdata0$commentdataoffset);


 
$commentdata .= str_repeat("\x00"27 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
$commentdataoffset += (27 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);


 
$commentdata .= $AsYetUnusedData;


 
$commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1));
}

}
$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata$commentdataoffset4));


 
$info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4;

$commentdataoffset += 4;
while ((
strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) {
if ((
$ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) {
$info['warning'][] = 'Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments';
break 
2;
}

$VorbisCommentPage++;

$oggpageinfo $this->ParseOggPageHeader();
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;


 
$AsYetUnusedData substr($commentdata$commentdataoffset);


 
$commentdata substr($commentdata0$commentdataoffset);


 
$commentdata .= str_repeat("\x00"27 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
$commentdataoffset += (27 $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);


 
$commentdata .= $AsYetUnusedData;


 if (!isset(
$info['ogg']['pageheader'][$VorbisCommentPage])) {
$info['warning'][] = 'undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell();
break;
}
$readlength self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1);
if (
$readlength <= 0) {
$info['warning'][] = 'invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell();
break;
}
$commentdata .= $this->fread($readlength);


 }
$ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset;
$commentstring substr($commentdata$commentdataoffset$ThisFileInfo_ogg_comments_raw[$i]['size']);
$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];

if (!
$commentstring) {


 
$info['warning'][] = 'Blank Ogg comment ['.$i.']';

} elseif (
strstr($commentstring'=')) {

$commentexploded explode('='$commentstring2);
$ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]);
$ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : '');

if (
$ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') {


 
 
 
$flac = new getid3_flac($this->getid3);
$flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']));
$flac->parsePICTURE();
$info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0];
unset(
$flac);

} elseif (
$ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') {

$data base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);
$this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure');

$imageinfo getid3_lib::GetDataImageSize($data);
if (
$imageinfo === false || !isset($imageinfo['mime'])) {
$this->warning('COVERART vorbiscomment tag contains invalid image');
continue;
}

$ogg = new self($this->getid3);
$ogg->setStringMode($data);
$info['ogg']['comments']['picture'][] = array(
'image_mime' => $imageinfo['mime'],
'datalength' => strlen($data),
'picturetype' => 'cover art',
'image_height' => $imageinfo['height'],
'image_width' => $imageinfo['width'],
'data' => $ogg->saveAttachment('coverart'0strlen($data), $imageinfo['mime']),
);
unset(
$ogg);

} else {

$info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];

}

} else {

$info['warning'][] = '[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring;

}
unset(
$ThisFileInfo_ogg_comments_raw[$i]);
}
unset(
$ThisFileInfo_ogg_comments_raw);



 
 if (isset(
$info['ogg']['comments']) && is_array($info['ogg']['comments'])) {
foreach (
$info['ogg']['comments'] as $index => $commentvalue) {
switch (
$index) {
case 
'rg_audiophile':
case 
'replaygain_album_gain':
$info['replay_gain']['album']['adjustment'] = (double) $commentvalue[0];
unset(
$info['ogg']['comments'][$index]);
break;

case 
'rg_radio':
case 
'replaygain_track_gain':
$info['replay_gain']['track']['adjustment'] = (double) $commentvalue[0];
unset(
$info['ogg']['comments'][$index]);
break;

case 
'replaygain_album_peak':
$info['replay_gain']['album']['peak'] = (double) $commentvalue[0];
unset(
$info['ogg']['comments'][$index]);
break;

case 
'rg_peak':
case 
'replaygain_track_peak':
$info['replay_gain']['track']['peak'] = (double) $commentvalue[0];
unset(
$info['ogg']['comments'][$index]);
break;

case 
'replaygain_reference_loudness':
$info['replay_gain']['reference_volume'] = (double) $commentvalue[0];
unset(
$info['ogg']['comments'][$index]);
break;

default:

 break;
}
}
}

$this->fseek($OriginalOffset);

return 
true;
}

public static function 
SpeexBandModeLookup($mode) {
static 
$SpeexBandModeLookup = array();
if (empty(
$SpeexBandModeLookup)) {
$SpeexBandModeLookup[0] = 'narrow';
$SpeexBandModeLookup[1] = 'wide';
$SpeexBandModeLookup[2] = 'ultra-wide';
}
return (isset(
$SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);
}


public static function 
OggPageSegmentLength($OggInfoArray$SegmentNumber=1) {
for (
$i 0$i $SegmentNumber$i++) {
$segmentlength 0;
foreach (
$OggInfoArray['segment_table'] as $key => $value) {
$segmentlength += $value;
if (
$value 255) {
break;
}
}
}
return 
$segmentlength;
}


public static function 
get_quality_from_nominal_bitrate($nominal_bitrate) {


 
$nominal_bitrate $nominal_bitrate 1000;

if (
$nominal_bitrate 128) {

 
$qval = ($nominal_bitrate 64) / 16;
} elseif (
$nominal_bitrate 256) {

 
$qval $nominal_bitrate 32;
} elseif (
$nominal_bitrate 320) {

 
$qval = ($nominal_bitrate 256) / 64;
} else {

 
$qval = ($nominal_bitrate 1300) / 180;
}

 
 return 
round($qval1); 
 }

public static function 
TheoraColorSpace($colorspace_id) {

 static 
$TheoraColorSpaceLookup = array();
if (empty(
$TheoraColorSpaceLookup)) {
$TheoraColorSpaceLookup[0] = 'Undefined';
$TheoraColorSpaceLookup[1] = 'Rec. 470M';
$TheoraColorSpaceLookup[2] = 'Rec. 470BG';
$TheoraColorSpaceLookup[3] = 'Reserved';
}
return (isset(
$TheoraColorSpaceLookup[$colorspace_id]) ? $TheoraColorSpaceLookup[$colorspace_id] : null);
}

public static function 
TheoraPixelFormat($pixelformat_id) {

 static 
$TheoraPixelFormatLookup = array();
if (empty(
$TheoraPixelFormatLookup)) {
$TheoraPixelFormatLookup[0] = '4:2:0';
$TheoraPixelFormatLookup[1] = 'Reserved';
$TheoraPixelFormatLookup[2] = '4:2:2';
$TheoraPixelFormatLookup[3] = '4:4:4';
}
return (isset(
$TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null);
}

}

For more information about the PHK package format: http://phk.tekwire.net