Viewing file: module.audio.ogg.php (35.63 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at http://getid3.sourceforge.net // // or http://www.getid3.org // // also https://github.com/JamesHeinrich/getID3 // ///////////////////////////////////////////////////////////////// // See readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.ogg.php // // module for analyzing Ogg Vorbis, OggFLAC and Speex files // // dependencies: module.audio.flac.php // // /// /////////////////////////////////////////////////////////////////
getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true);
class getid3_ogg extends getid3_handler { // http://xiph.org/vorbis/doc/Vorbis_I_spec.html public function Analyze() { $info = &$this->getid3->info;
$info['fileformat'] = 'ogg';
// Warn about illegal tags - only vorbiscomments are allowed if (isset($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.'; }
// Page 1 - Stream Header
$this->fseek($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']); $filedataoffset = 0;
if (substr($filedata, 0, 4) == 'fLaC') {
$info['audio']['dataformat'] = 'flac'; $info['audio']['bitrate_mode'] = 'vbr'; $info['audio']['lossless'] = true;
} elseif (substr($filedata, 1, 6) == 'vorbis') {
$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);
} elseif (substr($filedata, 0, 8) == 'Speex ') {
// http://www.speex.org/manual/node10.html
$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, $filedataoffset, 8); // hard-coded to 'Speex ' $filedataoffset += 8; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20); $filedataoffset += 20; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $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']) { $info['audio']['bitrate_mode'] = 'vbr'; }
} elseif (substr($filedata, 0, 7) == "\x80".'theora') {
// http://www.theora.org/doc/Theora.pdf (section 6.2)
$info['ogg']['pageheader']['theora']['theora_magic'] = substr($filedata, $filedataoffset, 7); // hard-coded to "\x80.'theora' $filedataoffset += 7; $info['ogg']['pageheader']['theora']['version_major'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader']['theora']['version_minor'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader']['theora']['version_revision'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader']['theora']['frame_width_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); $filedataoffset += 2; $info['ogg']['pageheader']['theora']['frame_height_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); $filedataoffset += 2; $info['ogg']['pageheader']['theora']['resolution_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); $filedataoffset += 3; $info['ogg']['pageheader']['theora']['resolution_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); $filedataoffset += 3; $info['ogg']['pageheader']['theora']['picture_offset_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader']['theora']['picture_offset_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader']['theora']['frame_rate_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader']['theora']['frame_rate_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); $filedataoffset += 3; $info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); $filedataoffset += 3; $info['ogg']['pageheader']['theora']['color_space_id'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader']['theora']['nominal_bitrate'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3)); $filedataoffset += 3; $info['ogg']['pageheader']['theora']['flags'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2)); $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; // should be 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['audio']['bitrate_mode'] = 'abr'; //$info['audio']['lossless'] = false; $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($filedata, 0, 8) == "fishead\x00") {
// Ogg Skeleton version 3.0 Format Specification // http://xiph.org/ogg/doc/skeleton.html $filedataoffset += 8; $info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); $filedataoffset += 2; $info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2)); $filedataoffset += 2; $info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20)); $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($filedata, 0, 8) == "fisbone\x00") {
$filedataoffset = 8; $info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata, $filedataoffset, 3); $filedataoffset += 3;
} elseif (substr($filedata, 1, 6) == 'theora') {
$info['video']['dataformat'] = 'theora1'; $info['error'][] = 'Ogg Theora (v1) not correctly handled in this version of getID3 ['.$this->getid3->version().']'; //break;
} elseif (substr($filedata, 1, 6) == 'vorbis') {
$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);
} else { $info['error'][] = 'unexpected'; //break; } //} while ($oggpageinfo['page_seqno'] == 0); } while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00"));
$this->fseek($oggpageinfo['page_start_offset']);
$info['error'][] = 'Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']'; //return false;
} else {
$info['error'][] = 'Expecting either "Speex " or "vorbis" identifier strings, found "'.substr($filedata, 0, 8).'"'; unset($info['ogg']); unset($info['mime_type']); return false;
}
// Page 2 - Comment Header $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($filedata, 0, 1)); $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis'
$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); $this->ParseVorbisComments(); break; }
// Last Page - Number of Samples if (!getid3_lib::intValueSupported($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 /', '', $info['ogg']['vendor']);
// Vorbis only if ($info['audio']['dataformat'] == 'vorbis') {
// Vorbis 1.0 starts with Xiph.Org if (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) {
if ($info['audio']['bitrate_mode'] == 'abr') {
// Set -b 128 on abr files $info['audio']['encoder_options'] = '-b '.round($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)) { // Set -q N on vbr files $info['audio']['encoder_options'] = '-q '.$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, $filedataoffset, 1)); $filedataoffset += 1; $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis' $filedataoffset += 6; $info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $info['audio']['channels'] = $info['ogg']['numberofchannels']; $info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; if ($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; // filled in later $info['ogg']['bitrate_average'] = 0; // filled in later $info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $info['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F); $info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4); $info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet
$info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr if ($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 ParseOggPageHeader() { // http://xiph.org/ogg/vorbis/doc/framing.html $oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file
$filedata = $this->fread($this->getid3->fread_buffer_size()); $filedataoffset = 0; while ((substr($filedata, $filedataoffset++, 4) != 'OggS')) { if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) { // should be found before here return false; } if ((($filedataoffset + 28) > strlen($filedata)) || (strlen($filedata) < 28)) { if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === false)) { // get some more data, unless eof, in which case fail return false; } } } $filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'
$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet $oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos) $oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)
$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8)); $filedataoffset += 8; $oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4)); $filedataoffset += 4; $oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $filedataoffset += 1; $oggheader['page_length'] = 0; for ($i = 0; $i < $oggheader['page_segments']; $i++) { $oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); $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; }
// http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005 public function ParseVorbisComments() { $info = &$this->getid3->info;
$OriginalOffset = $this->ftell(); $commentdataoffset = 0; $VorbisCommentPage = 1;
switch ($info['audio']['dataformat']) { case 'vorbis': case 'speex': $CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block $this->fseek($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); } 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, $commentdataoffset, 4)); $commentdataoffset += 4;
$info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize); $commentdataoffset += $VendorSize;
$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4)); $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++) {
$ThisFileInfo_ogg_comments_raw[$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++;
// First, save what we haven't read yet $AsYetUnusedData = substr($commentdata, $commentdataoffset);
// Then take that data off the end $commentdata = substr($commentdata, 0, $commentdataoffset);
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct $commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
// Finally, stick the unused data back on the end $commentdata .= $AsYetUnusedData;
//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); $commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1)); }
} $ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
// replace avdataoffset with position just after the last vorbiscomment $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;
// First, save what we haven't read yet $AsYetUnusedData = substr($commentdata, $commentdataoffset);
// Then take that data off the end $commentdata = substr($commentdata, 0, $commentdataoffset);
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct $commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']); $commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
// Finally, stick the unused data back on the end $commentdata .= $AsYetUnusedData;
//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']); if (!isset($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);
//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset']; } $ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset; $commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']); $commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];
if (!$commentstring) {
// no comment? $info['warning'][] = 'Blank Ogg comment ['.$i.']';
} elseif (strstr($commentstring, '=')) {
$commentexploded = explode('=', $commentstring, 2); $ThisFileInfo_ogg_comments_raw[$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') {
// http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE // The unencoded format is that of the FLAC picture block. The fields are stored in big endian order as in FLAC, picture data is stored according to the relevant standard. // http://flac.sourceforge.net/format.html#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'); /** @todo use 'coverartmime' where available */ $imageinfo = getid3_lib::GetDataImageSize($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'], 'data' => $ogg->saveAttachment('coverart', 0, strlen($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);
// Replay Gain Adjustment // http://privatewww.essex.ac.uk/~djmrob/replaygain/ 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: // do nothing 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) {
// decrease precision $nominal_bitrate = $nominal_bitrate / 1000;
if ($nominal_bitrate < 128) { // q-1 to q4 $qval = ($nominal_bitrate - 64) / 16; } elseif ($nominal_bitrate < 256) { // q4 to q8 $qval = $nominal_bitrate / 32; } elseif ($nominal_bitrate < 320) { // q8 to q9 $qval = ($nominal_bitrate + 256) / 64; } else { // q9 to q10 $qval = ($nominal_bitrate + 1300) / 180; } //return $qval; // 5.031324 //return intval($qval); // 5 return round($qval, 1); // 5 or 4.9 }
public static function TheoraColorSpace($colorspace_id) { // http://www.theora.org/doc/Theora.pdf (table 6.3) 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) { // http://www.theora.org/doc/Theora.pdf (table 6.4) 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); }
}
|