Diff: STRATO-apps/wordpress_03/app/wp-includes/ID3/module.audio.ogg.php
Keine Baseline-Datei – Diff nur gegen leer.
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<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at https://github.com/JamesHeinrich/getID3 //
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// or https://www.getid3.org //
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// or http://getid3.sourceforge.net //
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// see readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.audio.ogg.php //
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// module for analyzing Ogg Vorbis, OggFLAC and Speex files //
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// dependencies: module.audio.flac.php //
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// ///
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/////////////////////////////////////////////////////////////////
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if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
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exit;
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}
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getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.flac.php', __FILE__, true);
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class getid3_ogg extends getid3_handler
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{
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/**
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* @link http://xiph.org/vorbis/doc/Vorbis_I_spec.html
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*
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* @return bool
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*/
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public function Analyze() {
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$info = &$this->getid3->info;
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$info['fileformat'] = 'ogg';
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// Warn about illegal tags - only vorbiscomments are allowed
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if (isset($info['id3v2'])) {
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$this->warning('Illegal ID3v2 tag present.');
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}
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if (isset($info['id3v1'])) {
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$this->warning('Illegal ID3v1 tag present.');
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}
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if (isset($info['ape'])) {
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$this->warning('Illegal APE tag present.');
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}
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// Page 1 - Stream Header
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$this->fseek($info['avdataoffset']);
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$oggpageinfo = $this->ParseOggPageHeader();
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
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if ($this->ftell() >= $this->getid3->fread_buffer_size()) {
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$this->error('Could not find start of Ogg page in the first '.$this->getid3->fread_buffer_size().' bytes (this might not be an Ogg-Vorbis file?)');
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unset($info['fileformat']);
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unset($info['ogg']);
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return false;
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}
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$filedata = $this->fread($oggpageinfo['page_length']);
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$filedataoffset = 0;
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if (substr($filedata, 0, 4) == 'fLaC') {
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$info['audio']['dataformat'] = 'flac';
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$info['audio']['bitrate_mode'] = 'vbr';
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$info['audio']['lossless'] = true;
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} elseif (substr($filedata, 1, 6) == 'vorbis') {
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$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);
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} elseif (substr($filedata, 0, 8) == 'OpusHead') {
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if ($this->ParseOpusPageHeader($filedata, $filedataoffset, $oggpageinfo) === false) {
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return false;
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}
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} elseif (substr($filedata, 0, 8) == 'Speex ') {
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// http://www.speex.org/manual/node10.html
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$info['audio']['dataformat'] = 'speex';
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$info['mime_type'] = 'audio/speex';
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$info['audio']['bitrate_mode'] = 'abr';
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$info['audio']['lossless'] = false;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_string'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'Speex '
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$filedataoffset += 8;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version'] = substr($filedata, $filedataoffset, 20);
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$filedataoffset += 20;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version_id'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['header_size'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode_bitstream_version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['bitrate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['framesize'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['frames_per_packet'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['extra_headers'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved1'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['reserved2'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['speex']['speex_version'] = trim($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['speex_version']);
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$info['speex']['sample_rate'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['rate'];
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$info['speex']['channels'] = $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['nb_channels'];
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$info['speex']['vbr'] = (bool) $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['vbr'];
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$info['speex']['band_type'] = $this->SpeexBandModeLookup($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['mode']);
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$info['audio']['sample_rate'] = $info['speex']['sample_rate'];
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$info['audio']['channels'] = $info['speex']['channels'];
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if ($info['speex']['vbr']) {
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$info['audio']['bitrate_mode'] = 'vbr';
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}
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} elseif (substr($filedata, 0, 7) == "\x80".'theora') {
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// http://www.theora.org/doc/Theora.pdf (section 6.2)
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$info['ogg']['pageheader']['theora']['theora_magic'] = substr($filedata, $filedataoffset, 7); // hard-coded to "\x80.'theora'
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$filedataoffset += 7;
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$info['ogg']['pageheader']['theora']['version_major'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['pageheader']['theora']['version_minor'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['pageheader']['theora']['version_revision'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['pageheader']['theora']['frame_width_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2));
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$filedataoffset += 2;
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$info['ogg']['pageheader']['theora']['frame_height_macroblocks'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2));
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$filedataoffset += 2;
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$info['ogg']['pageheader']['theora']['resolution_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3));
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$filedataoffset += 3;
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$info['ogg']['pageheader']['theora']['resolution_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3));
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$filedataoffset += 3;
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$info['ogg']['pageheader']['theora']['picture_offset_x'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['pageheader']['theora']['picture_offset_y'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['pageheader']['theora']['frame_rate_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader']['theora']['frame_rate_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3));
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$filedataoffset += 3;
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$info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3));
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$filedataoffset += 3;
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$info['ogg']['pageheader']['theora']['color_space_id'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['pageheader']['theora']['nominal_bitrate'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 3));
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$filedataoffset += 3;
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$info['ogg']['pageheader']['theora']['flags'] = getid3_lib::BigEndian2Int(substr($filedata, $filedataoffset, 2));
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$filedataoffset += 2;
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$info['ogg']['pageheader']['theora']['quality'] = ($info['ogg']['pageheader']['theora']['flags'] & 0xFC00) >> 10;
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$info['ogg']['pageheader']['theora']['kfg_shift'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x03E0) >> 5;
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$info['ogg']['pageheader']['theora']['pixel_format_id'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0018) >> 3;
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$info['ogg']['pageheader']['theora']['reserved'] = ($info['ogg']['pageheader']['theora']['flags'] & 0x0007) >> 0; // should be 0
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$info['ogg']['pageheader']['theora']['color_space'] = self::TheoraColorSpace($info['ogg']['pageheader']['theora']['color_space_id']);
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$info['ogg']['pageheader']['theora']['pixel_format'] = self::TheoraPixelFormat($info['ogg']['pageheader']['theora']['pixel_format_id']);
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$info['video']['dataformat'] = 'theora';
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$info['mime_type'] = 'video/ogg';
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//$info['audio']['bitrate_mode'] = 'abr';
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//$info['audio']['lossless'] = false;
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$info['video']['resolution_x'] = $info['ogg']['pageheader']['theora']['resolution_x'];
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$info['video']['resolution_y'] = $info['ogg']['pageheader']['theora']['resolution_y'];
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if ($info['ogg']['pageheader']['theora']['frame_rate_denominator'] > 0) {
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$info['video']['frame_rate'] = (float) $info['ogg']['pageheader']['theora']['frame_rate_numerator'] / $info['ogg']['pageheader']['theora']['frame_rate_denominator'];
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}
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if ($info['ogg']['pageheader']['theora']['pixel_aspect_denominator'] > 0) {
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$info['video']['pixel_aspect_ratio'] = (float) $info['ogg']['pageheader']['theora']['pixel_aspect_numerator'] / $info['ogg']['pageheader']['theora']['pixel_aspect_denominator'];
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}
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$this->warning('Ogg Theora (v3) not fully supported in this version of getID3 ['.$this->getid3->version().'] -- bitrate, playtime and all audio data are currently unavailable');
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} elseif (substr($filedata, 0, 8) == "fishead\x00") {
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// Ogg Skeleton version 3.0 Format Specification
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// http://xiph.org/ogg/doc/skeleton.html
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fishead']['raw']['version_major'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));
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$filedataoffset += 2;
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$info['ogg']['skeleton']['fishead']['raw']['version_minor'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));
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$filedataoffset += 2;
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$info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fishead']['raw']['basetime_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fishead']['raw']['utc'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 20));
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$filedataoffset += 20;
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$info['ogg']['skeleton']['fishead']['version'] = $info['ogg']['skeleton']['fishead']['raw']['version_major'].'.'.$info['ogg']['skeleton']['fishead']['raw']['version_minor'];
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$info['ogg']['skeleton']['fishead']['presentationtime'] = getid3_lib::SafeDiv($info['ogg']['skeleton']['fishead']['raw']['presentationtime_numerator'], $info['ogg']['skeleton']['fishead']['raw']['presentationtime_denominator']);
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$info['ogg']['skeleton']['fishead']['basetime'] = getid3_lib::SafeDiv($info['ogg']['skeleton']['fishead']['raw']['basetime_numerator'], $info['ogg']['skeleton']['fishead']['raw']['basetime_denominator']);
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$info['ogg']['skeleton']['fishead']['utc'] = $info['ogg']['skeleton']['fishead']['raw']['utc'];
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$counter = 0;
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do {
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$oggpageinfo = $this->ParseOggPageHeader();
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno'].'.'.$counter++] = $oggpageinfo;
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$filedata = $this->fread($oggpageinfo['page_length']);
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$this->fseek($oggpageinfo['page_end_offset']);
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if (substr($filedata, 0, 8) == "fisbone\x00") {
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$filedataoffset = 8;
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$info['ogg']['skeleton']['fisbone']['raw']['message_header_offset'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['skeleton']['fisbone']['raw']['serial_number'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['skeleton']['fisbone']['raw']['number_header_packets'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['skeleton']['fisbone']['raw']['granulerate_numerator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fisbone']['raw']['granulerate_denominator'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fisbone']['raw']['basegranule'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
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$filedataoffset += 8;
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$info['ogg']['skeleton']['fisbone']['raw']['preroll'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
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$filedataoffset += 4;
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$info['ogg']['skeleton']['fisbone']['raw']['granuleshift'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
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$filedataoffset += 1;
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$info['ogg']['skeleton']['fisbone']['raw']['padding'] = substr($filedata, $filedataoffset, 3);
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$filedataoffset += 3;
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+
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} elseif (substr($filedata, 1, 6) == 'theora') {
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+
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$info['video']['dataformat'] = 'theora1';
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$this->error('Ogg Theora (v1) not correctly handled in this version of getID3 ['.$this->getid3->version().']');
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//break;
252
+
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} elseif (substr($filedata, 1, 6) == 'vorbis') {
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+
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$this->ParseVorbisPageHeader($filedata, $filedataoffset, $oggpageinfo);
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+
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} else {
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$this->error('unexpected');
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//break;
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}
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//} while ($oggpageinfo['page_seqno'] == 0);
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} while (($oggpageinfo['page_seqno'] == 0) && (substr($filedata, 0, 8) != "fisbone\x00"));
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+
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+
$this->fseek($oggpageinfo['page_start_offset']);
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+
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$this->error('Ogg Skeleton not correctly handled in this version of getID3 ['.$this->getid3->version().']');
267
+
//return false;
268
+
269
+
} elseif (substr($filedata, 0, 5) == "\x7F".'FLAC') {
270
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// https://xiph.org/flac/ogg_mapping.html
271
+
272
+
$info['audio']['dataformat'] = 'flac';
273
+
$info['audio']['bitrate_mode'] = 'vbr';
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$info['audio']['lossless'] = true;
275
+
276
+
$info['ogg']['flac']['header']['version_major'] = ord(substr($filedata, 5, 1));
277
+
$info['ogg']['flac']['header']['version_minor'] = ord(substr($filedata, 6, 1));
278
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$info['ogg']['flac']['header']['header_packets'] = getid3_lib::BigEndian2Int(substr($filedata, 7, 2)) + 1; // "A two-byte, big-endian binary number signifying the number of header (non-audio) packets, not including this one. This number may be zero (0x0000) to signify 'unknown' but be aware that some decoders may not be able to handle such streams."
279
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$info['ogg']['flac']['header']['magic'] = substr($filedata, 9, 4);
280
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if ($info['ogg']['flac']['header']['magic'] != 'fLaC') {
281
+
$this->error('Ogg-FLAC expecting "fLaC", found "'.$info['ogg']['flac']['header']['magic'].'" ('.trim(getid3_lib::PrintHexBytes($info['ogg']['flac']['header']['magic'])).')');
282
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return false;
283
+
}
284
+
$info['ogg']['flac']['header']['STREAMINFO_bytes'] = getid3_lib::BigEndian2Int(substr($filedata, 13, 4));
285
+
$info['flac']['STREAMINFO'] = getid3_flac::parseSTREAMINFOdata(substr($filedata, 17, 34));
286
+
if (!empty($info['flac']['STREAMINFO']['sample_rate'])) {
287
+
$info['audio']['bitrate_mode'] = 'vbr';
288
+
$info['audio']['sample_rate'] = $info['flac']['STREAMINFO']['sample_rate'];
289
+
$info['audio']['channels'] = $info['flac']['STREAMINFO']['channels'];
290
+
$info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample'];
291
+
$info['playtime_seconds'] = getid3_lib::SafeDiv($info['flac']['STREAMINFO']['samples_stream'], $info['flac']['STREAMINFO']['sample_rate']);
292
+
}
293
+
294
+
} else {
295
+
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+
$this->error('Expecting one of "vorbis", "Speex", "OpusHead", "vorbis", "fishhead", "theora", "fLaC" identifier strings, found "'.substr($filedata, 0, 8).'"');
297
+
unset($info['ogg']);
298
+
unset($info['mime_type']);
299
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return false;
300
+
301
+
}
302
+
303
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// Page 2 - Comment Header
304
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$oggpageinfo = $this->ParseOggPageHeader();
305
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$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
306
+
307
+
switch ($info['audio']['dataformat']) {
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case 'vorbis':
309
+
$filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
310
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, 0, 1));
311
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 1, 6); // hard-coded to 'vorbis'
312
+
313
+
$this->ParseVorbisComments();
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break;
315
+
316
+
case 'flac':
317
+
$flac = new getid3_flac($this->getid3);
318
+
if (!$flac->parseMETAdata()) {
319
+
$this->error('Failed to parse FLAC headers');
320
+
return false;
321
+
}
322
+
unset($flac);
323
+
break;
324
+
325
+
case 'speex':
326
+
$this->fseek($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length'], SEEK_CUR);
327
+
$this->ParseVorbisComments();
328
+
break;
329
+
330
+
case 'opus':
331
+
$filedata = $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
332
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, 0, 8); // hard-coded to 'OpusTags'
333
+
if(substr($filedata, 0, 8) != 'OpusTags') {
334
+
$this->error('Expected "OpusTags" as header but got "'.substr($filedata, 0, 8).'"');
335
+
return false;
336
+
}
337
+
338
+
$this->ParseVorbisComments();
339
+
break;
340
+
341
+
}
342
+
343
+
// Last Page - Number of Samples
344
+
if (!getid3_lib::intValueSupported($info['avdataend'])) {
345
+
346
+
$this->warning('Unable to parse Ogg end chunk file (PHP does not support file operations beyond '.round(PHP_INT_MAX / 1073741824).'GB)');
347
+
348
+
} else {
349
+
350
+
$this->fseek(max($info['avdataend'] - $this->getid3->fread_buffer_size(), 0));
351
+
$LastChunkOfOgg = strrev($this->fread($this->getid3->fread_buffer_size()));
352
+
if ($LastOggSpostion = strpos($LastChunkOfOgg, 'SggO')) {
353
+
if (substr($LastChunkOfOgg, 13, 8) === "\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF") {
354
+
// https://github.com/JamesHeinrich/getID3/issues/450
355
+
// "Sometimes, Opus encoders (WhatsApp voice registrations and others) add a special last header with a granule duration of 0xFFFFFFFFFFFFFF.
356
+
// This value indicates "this is the end," but must be ignored; otherwise, it makes calculations wrong."
357
+
$LastOggSpostion = strpos($LastChunkOfOgg, 'SggO', $LastOggSpostion + 1);
358
+
}
359
+
$this->fseek($info['avdataend'] - ($LastOggSpostion + strlen('SggO')));
360
+
$info['avdataend'] = $this->ftell();
361
+
$info['ogg']['pageheader']['eos'] = $this->ParseOggPageHeader();
362
+
$info['ogg']['samples'] = $info['ogg']['pageheader']['eos']['pcm_abs_position'];
363
+
if ($info['ogg']['samples'] == 0) {
364
+
$this->error('Corrupt Ogg file: eos.number of samples == zero');
365
+
return false;
366
+
}
367
+
if (!empty($info['audio']['sample_rate'])) {
368
+
$info['ogg']['bitrate_average'] = (($info['avdataend'] - $info['avdataoffset']) * 8) * $info['audio']['sample_rate'] / $info['ogg']['samples'];
369
+
}
370
+
}
371
+
372
+
}
373
+
374
+
if (!empty($info['ogg']['bitrate_average'])) {
375
+
$info['audio']['bitrate'] = $info['ogg']['bitrate_average'];
376
+
} elseif (!empty($info['ogg']['bitrate_nominal'])) {
377
+
$info['audio']['bitrate'] = $info['ogg']['bitrate_nominal'];
378
+
} elseif (!empty($info['ogg']['bitrate_min']) && !empty($info['ogg']['bitrate_max'])) {
379
+
$info['audio']['bitrate'] = ($info['ogg']['bitrate_min'] + $info['ogg']['bitrate_max']) / 2;
380
+
}
381
+
if (isset($info['audio']['bitrate']) && !isset($info['playtime_seconds'])) {
382
+
if ($info['audio']['bitrate'] == 0) {
383
+
$this->error('Corrupt Ogg file: bitrate_audio == zero');
384
+
return false;
385
+
}
386
+
$info['playtime_seconds'] = (float) ((($info['avdataend'] - $info['avdataoffset']) * 8) / $info['audio']['bitrate']);
387
+
}
388
+
389
+
if (isset($info['ogg']['vendor'])) {
390
+
$info['audio']['encoder'] = preg_replace('/^Encoded with /', '', $info['ogg']['vendor']);
391
+
392
+
// Vorbis only
393
+
if ($info['audio']['dataformat'] == 'vorbis') {
394
+
395
+
// Vorbis 1.0 starts with Xiph.Org
396
+
if (preg_match('/^Xiph.Org/', $info['audio']['encoder'])) {
397
+
398
+
if ($info['audio']['bitrate_mode'] == 'abr') {
399
+
400
+
// Set -b 128 on abr files
401
+
$info['audio']['encoder_options'] = '-b '.round($info['ogg']['bitrate_nominal'] / 1000);
402
+
403
+
} elseif (($info['audio']['bitrate_mode'] == 'vbr') && ($info['audio']['channels'] == 2) && ($info['audio']['sample_rate'] >= 44100) && ($info['audio']['sample_rate'] <= 48000)) {
404
+
// Set -q N on vbr files
405
+
$info['audio']['encoder_options'] = '-q '.$this->get_quality_from_nominal_bitrate($info['ogg']['bitrate_nominal']);
406
+
407
+
}
408
+
}
409
+
410
+
if (empty($info['audio']['encoder_options']) && !empty($info['ogg']['bitrate_nominal'])) {
411
+
$info['audio']['encoder_options'] = 'Nominal bitrate: '.intval(round($info['ogg']['bitrate_nominal'] / 1000)).'kbps';
412
+
}
413
+
}
414
+
}
415
+
416
+
return true;
417
+
}
418
+
419
+
/**
420
+
* @param string $filedata
421
+
* @param int $filedataoffset
422
+
* @param array $oggpageinfo
423
+
*
424
+
* @return bool
425
+
*/
426
+
public function ParseVorbisPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
427
+
$info = &$this->getid3->info;
428
+
$info['audio']['dataformat'] = 'vorbis';
429
+
$info['audio']['lossless'] = false;
430
+
431
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
432
+
$filedataoffset += 1;
433
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['stream_type'] = substr($filedata, $filedataoffset, 6); // hard-coded to 'vorbis'
434
+
$filedataoffset += 6;
435
+
$info['ogg']['bitstreamversion'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
436
+
$filedataoffset += 4;
437
+
$info['ogg']['numberofchannels'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
438
+
$filedataoffset += 1;
439
+
$info['audio']['channels'] = $info['ogg']['numberofchannels'];
440
+
$info['ogg']['samplerate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
441
+
$filedataoffset += 4;
442
+
if ($info['ogg']['samplerate'] == 0) {
443
+
$this->error('Corrupt Ogg file: sample rate == zero');
444
+
return false;
445
+
}
446
+
$info['audio']['sample_rate'] = $info['ogg']['samplerate'];
447
+
$info['ogg']['samples'] = 0; // filled in later
448
+
$info['ogg']['bitrate_average'] = 0; // filled in later
449
+
$info['ogg']['bitrate_max'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
450
+
$filedataoffset += 4;
451
+
$info['ogg']['bitrate_nominal'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
452
+
$filedataoffset += 4;
453
+
$info['ogg']['bitrate_min'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
454
+
$filedataoffset += 4;
455
+
$info['ogg']['blocksize_small'] = pow(2, getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0x0F);
456
+
$info['ogg']['blocksize_large'] = pow(2, (getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)) & 0xF0) >> 4);
457
+
$info['ogg']['stop_bit'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1)); // must be 1, marks end of packet
458
+
459
+
$info['audio']['bitrate_mode'] = 'vbr'; // overridden if actually abr
460
+
if ($info['ogg']['bitrate_max'] == 0xFFFFFFFF) {
461
+
unset($info['ogg']['bitrate_max']);
462
+
$info['audio']['bitrate_mode'] = 'abr';
463
+
}
464
+
if ($info['ogg']['bitrate_nominal'] == 0xFFFFFFFF) {
465
+
unset($info['ogg']['bitrate_nominal']);
466
+
}
467
+
if ($info['ogg']['bitrate_min'] == 0xFFFFFFFF) {
468
+
unset($info['ogg']['bitrate_min']);
469
+
$info['audio']['bitrate_mode'] = 'abr';
470
+
}
471
+
return true;
472
+
}
473
+
474
+
/**
475
+
* @link http://tools.ietf.org/html/draft-ietf-codec-oggopus-03
476
+
*
477
+
* @param string $filedata
478
+
* @param int $filedataoffset
479
+
* @param array $oggpageinfo
480
+
*
481
+
* @return bool
482
+
*/
483
+
public function ParseOpusPageHeader(&$filedata, &$filedataoffset, &$oggpageinfo) {
484
+
$info = &$this->getid3->info;
485
+
$info['audio']['dataformat'] = 'opus';
486
+
$info['mime_type'] = 'audio/ogg; codecs=opus';
487
+
488
+
/** @todo find a usable way to detect abr (vbr that is padded to be abr) */
489
+
$info['audio']['bitrate_mode'] = 'vbr';
490
+
491
+
$info['audio']['lossless'] = false;
492
+
493
+
$info['ogg']['pageheader']['opus']['opus_magic'] = substr($filedata, $filedataoffset, 8); // hard-coded to 'OpusHead'
494
+
$filedataoffset += 8;
495
+
$info['ogg']['pageheader']['opus']['version'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
496
+
$filedataoffset += 1;
497
+
498
+
if ($info['ogg']['pageheader']['opus']['version'] < 1 || $info['ogg']['pageheader']['opus']['version'] > 15) {
499
+
$this->error('Unknown opus version number (only accepting 1-15)');
500
+
return false;
501
+
}
502
+
503
+
$info['ogg']['pageheader']['opus']['out_channel_count'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
504
+
$filedataoffset += 1;
505
+
506
+
if ($info['ogg']['pageheader']['opus']['out_channel_count'] == 0) {
507
+
$this->error('Invalid channel count in opus header (must not be zero)');
508
+
return false;
509
+
}
510
+
511
+
$info['ogg']['pageheader']['opus']['pre_skip'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));
512
+
$filedataoffset += 2;
513
+
514
+
$info['ogg']['pageheader']['opus']['input_sample_rate'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
515
+
$filedataoffset += 4;
516
+
517
+
//$info['ogg']['pageheader']['opus']['output_gain'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 2));
518
+
//$filedataoffset += 2;
519
+
520
+
//$info['ogg']['pageheader']['opus']['channel_mapping_family'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
521
+
//$filedataoffset += 1;
522
+
523
+
$info['opus']['opus_version'] = $info['ogg']['pageheader']['opus']['version'];
524
+
$info['opus']['sample_rate_input'] = $info['ogg']['pageheader']['opus']['input_sample_rate'];
525
+
$info['opus']['out_channel_count'] = $info['ogg']['pageheader']['opus']['out_channel_count'];
526
+
527
+
$info['audio']['channels'] = $info['opus']['out_channel_count'];
528
+
$info['audio']['sample_rate_input'] = $info['opus']['sample_rate_input'];
529
+
$info['audio']['sample_rate'] = 48000; // "All Opus audio is coded at 48 kHz, and should also be decoded at 48 kHz for playback (unless the target hardware does not support this sampling rate). However, this field may be used to resample the audio back to the original sampling rate, for example, when saving the output to a file." -- https://mf4.xiph.org/jenkins/view/opus/job/opusfile-unix/ws/doc/html/structOpusHead.html
530
+
return true;
531
+
}
532
+
533
+
/**
534
+
* @return array|false
535
+
*/
536
+
public function ParseOggPageHeader() {
537
+
// http://xiph.org/ogg/vorbis/doc/framing.html
538
+
$oggheader = array();
539
+
$oggheader['page_start_offset'] = $this->ftell(); // where we started from in the file
540
+
541
+
$filedata = $this->fread($this->getid3->fread_buffer_size());
542
+
$filedataoffset = 0;
543
+
while (substr($filedata, $filedataoffset++, 4) != 'OggS') {
544
+
if (($this->ftell() - $oggheader['page_start_offset']) >= $this->getid3->fread_buffer_size()) {
545
+
// should be found before here
546
+
return false;
547
+
}
548
+
if (($filedataoffset + 28) > strlen($filedata)) {
549
+
if ($this->feof() || (($filedata .= $this->fread($this->getid3->fread_buffer_size())) === '')) {
550
+
// get some more data, unless eof, in which case fail
551
+
return false;
552
+
}
553
+
}
554
+
}
555
+
$filedataoffset += strlen('OggS') - 1; // page, delimited by 'OggS'
556
+
557
+
$oggheader['stream_structver'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
558
+
$filedataoffset += 1;
559
+
$oggheader['flags_raw'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
560
+
$filedataoffset += 1;
561
+
$oggheader['flags']['fresh'] = (bool) ($oggheader['flags_raw'] & 0x01); // fresh packet
562
+
$oggheader['flags']['bos'] = (bool) ($oggheader['flags_raw'] & 0x02); // first page of logical bitstream (bos)
563
+
$oggheader['flags']['eos'] = (bool) ($oggheader['flags_raw'] & 0x04); // last page of logical bitstream (eos)
564
+
565
+
$oggheader['pcm_abs_position'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 8));
566
+
$filedataoffset += 8;
567
+
$oggheader['stream_serialno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
568
+
$filedataoffset += 4;
569
+
$oggheader['page_seqno'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
570
+
$filedataoffset += 4;
571
+
$oggheader['page_checksum'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 4));
572
+
$filedataoffset += 4;
573
+
$oggheader['page_segments'] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
574
+
$filedataoffset += 1;
575
+
$oggheader['page_length'] = 0;
576
+
for ($i = 0; $i < $oggheader['page_segments']; $i++) {
577
+
$oggheader['segment_table'][$i] = getid3_lib::LittleEndian2Int(substr($filedata, $filedataoffset, 1));
578
+
$filedataoffset += 1;
579
+
$oggheader['page_length'] += $oggheader['segment_table'][$i];
580
+
}
581
+
$oggheader['header_end_offset'] = $oggheader['page_start_offset'] + $filedataoffset;
582
+
$oggheader['page_end_offset'] = $oggheader['header_end_offset'] + $oggheader['page_length'];
583
+
$this->fseek($oggheader['header_end_offset']);
584
+
585
+
return $oggheader;
586
+
}
587
+
588
+
/**
589
+
* @link http://xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-810005
590
+
*
591
+
* @return bool
592
+
*/
593
+
public function ParseVorbisComments() {
594
+
$info = &$this->getid3->info;
595
+
596
+
$OriginalOffset = $this->ftell();
597
+
$commentdata = null;
598
+
$commentdataoffset = 0;
599
+
$VorbisCommentPage = 1;
600
+
$CommentStartOffset = 0;
601
+
602
+
switch ($info['audio']['dataformat']) {
603
+
case 'vorbis':
604
+
case 'speex':
605
+
case 'opus':
606
+
$CommentStartOffset = $info['ogg']['pageheader'][$VorbisCommentPage]['page_start_offset']; // Second Ogg page, after header block
607
+
$this->fseek($CommentStartOffset);
608
+
$commentdataoffset = 27 + $info['ogg']['pageheader'][$VorbisCommentPage]['page_segments'];
609
+
$commentdata = $this->fread(self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1) + $commentdataoffset);
610
+
611
+
if ($info['audio']['dataformat'] == 'vorbis') {
612
+
$commentdataoffset += (strlen('vorbis') + 1);
613
+
}
614
+
else if ($info['audio']['dataformat'] == 'opus') {
615
+
$commentdataoffset += strlen('OpusTags');
616
+
}
617
+
618
+
break;
619
+
620
+
case 'flac':
621
+
$CommentStartOffset = $info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4;
622
+
$this->fseek($CommentStartOffset);
623
+
$commentdata = $this->fread($info['flac']['VORBIS_COMMENT']['raw']['block_length']);
624
+
break;
625
+
626
+
default:
627
+
return false;
628
+
}
629
+
630
+
$VendorSize = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
631
+
$commentdataoffset += 4;
632
+
633
+
$info['ogg']['vendor'] = substr($commentdata, $commentdataoffset, $VendorSize);
634
+
$commentdataoffset += $VendorSize;
635
+
636
+
$CommentsCount = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
637
+
$commentdataoffset += 4;
638
+
$info['avdataoffset'] = $CommentStartOffset + $commentdataoffset;
639
+
640
+
$basicfields = array('TITLE', 'ARTIST', 'ALBUM', 'TRACKNUMBER', 'GENRE', 'DATE', 'DESCRIPTION', 'COMMENT');
641
+
$ThisFileInfo_ogg_comments_raw = &$info['ogg']['comments_raw'];
642
+
for ($i = 0; $i < $CommentsCount; $i++) {
643
+
644
+
if ($i >= 10000) {
645
+
// https://github.com/owncloud/music/issues/212#issuecomment-43082336
646
+
$this->warning('Unexpectedly large number ('.$CommentsCount.') of Ogg comments - breaking after reading '.$i.' comments');
647
+
break;
648
+
}
649
+
650
+
$ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] = $CommentStartOffset + $commentdataoffset;
651
+
652
+
if ($this->ftell() < ($ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + 4)) {
653
+
if ($oggpageinfo = $this->ParseOggPageHeader()) {
654
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
655
+
656
+
$VorbisCommentPage++;
657
+
658
+
// First, save what we haven't read yet
659
+
$AsYetUnusedData = substr($commentdata, $commentdataoffset);
660
+
661
+
// Then take that data off the end
662
+
$commentdata = substr($commentdata, 0, $commentdataoffset);
663
+
664
+
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
665
+
$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
666
+
$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
667
+
668
+
// Finally, stick the unused data back on the end
669
+
$commentdata .= $AsYetUnusedData;
670
+
671
+
//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
672
+
$commentdata .= $this->fread($this->OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1));
673
+
}
674
+
675
+
}
676
+
$ThisFileInfo_ogg_comments_raw[$i]['size'] = getid3_lib::LittleEndian2Int(substr($commentdata, $commentdataoffset, 4));
677
+
678
+
// replace avdataoffset with position just after the last vorbiscomment
679
+
$info['avdataoffset'] = $ThisFileInfo_ogg_comments_raw[$i]['dataoffset'] + $ThisFileInfo_ogg_comments_raw[$i]['size'] + 4;
680
+
681
+
$commentdataoffset += 4;
682
+
while ((strlen($commentdata) - $commentdataoffset) < $ThisFileInfo_ogg_comments_raw[$i]['size']) {
683
+
if (($ThisFileInfo_ogg_comments_raw[$i]['size'] > $info['avdataend']) || ($ThisFileInfo_ogg_comments_raw[$i]['size'] < 0)) {
684
+
$this->warning('Invalid Ogg comment size (comment #'.$i.', claims to be '.number_format($ThisFileInfo_ogg_comments_raw[$i]['size']).' bytes) - aborting reading comments');
685
+
break 2;
686
+
}
687
+
688
+
$VorbisCommentPage++;
689
+
690
+
if ($oggpageinfo = $this->ParseOggPageHeader()) {
691
+
$info['ogg']['pageheader'][$oggpageinfo['page_seqno']] = $oggpageinfo;
692
+
693
+
// First, save what we haven't read yet
694
+
$AsYetUnusedData = substr($commentdata, $commentdataoffset);
695
+
696
+
// Then take that data off the end
697
+
$commentdata = substr($commentdata, 0, $commentdataoffset);
698
+
699
+
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct
700
+
$commentdata .= str_repeat("\x00", 27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
701
+
$commentdataoffset += (27 + $info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_segments']);
702
+
703
+
// Finally, stick the unused data back on the end
704
+
$commentdata .= $AsYetUnusedData;
705
+
706
+
//$commentdata .= $this->fread($info['ogg']['pageheader'][$oggpageinfo['page_seqno']]['page_length']);
707
+
if (!isset($info['ogg']['pageheader'][$VorbisCommentPage])) {
708
+
$this->warning('undefined Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell());
709
+
break;
710
+
}
711
+
$readlength = self::OggPageSegmentLength($info['ogg']['pageheader'][$VorbisCommentPage], 1);
712
+
if ($readlength <= 0) {
713
+
$this->warning('invalid length Vorbis Comment page "'.$VorbisCommentPage.'" at offset '.$this->ftell());
714
+
break;
715
+
}
716
+
$commentdata .= $this->fread($readlength);
717
+
718
+
//$filebaseoffset += $oggpageinfo['header_end_offset'] - $oggpageinfo['page_start_offset'];
719
+
} else {
720
+
$this->warning('failed to ParseOggPageHeader() at offset '.$this->ftell());
721
+
break;
722
+
}
723
+
}
724
+
$ThisFileInfo_ogg_comments_raw[$i]['offset'] = $commentdataoffset;
725
+
$commentstring = substr($commentdata, $commentdataoffset, $ThisFileInfo_ogg_comments_raw[$i]['size']);
726
+
$commentdataoffset += $ThisFileInfo_ogg_comments_raw[$i]['size'];
727
+
728
+
if (!$commentstring) {
729
+
730
+
// no comment?
731
+
$this->warning('Blank Ogg comment ['.$i.']');
732
+
733
+
} elseif (strstr($commentstring, '=')) {
734
+
735
+
$commentexploded = explode('=', $commentstring, 2);
736
+
$ThisFileInfo_ogg_comments_raw[$i]['key'] = strtoupper($commentexploded[0]);
737
+
$ThisFileInfo_ogg_comments_raw[$i]['value'] = (isset($commentexploded[1]) ? $commentexploded[1] : '');
738
+
739
+
if ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'METADATA_BLOCK_PICTURE') {
740
+
741
+
// http://wiki.xiph.org/VorbisComment#METADATA_BLOCK_PICTURE
742
+
// 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.
743
+
// http://flac.sourceforge.net/format.html#metadata_block_picture
744
+
$flac = new getid3_flac($this->getid3);
745
+
$flac->setStringMode(base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']));
746
+
$flac->parsePICTURE();
747
+
$info['ogg']['comments']['picture'][] = $flac->getid3->info['flac']['PICTURE'][0];
748
+
unset($flac);
749
+
750
+
} elseif ($ThisFileInfo_ogg_comments_raw[$i]['key'] == 'COVERART') {
751
+
752
+
$data = base64_decode($ThisFileInfo_ogg_comments_raw[$i]['value']);
753
+
$this->notice('Found deprecated COVERART tag, it should be replaced in honor of METADATA_BLOCK_PICTURE structure');
754
+
/** @todo use 'coverartmime' where available */
755
+
$imageinfo = getid3_lib::GetDataImageSize($data);
756
+
if ($imageinfo === false || !isset($imageinfo['mime'])) {
757
+
$this->warning('COVERART vorbiscomment tag contains invalid image');
758
+
continue;
759
+
}
760
+
761
+
$ogg = new self($this->getid3);
762
+
$ogg->setStringMode($data);
763
+
$info['ogg']['comments']['picture'][] = array(
764
+
'image_mime' => $imageinfo['mime'],
765
+
'datalength' => strlen($data),
766
+
'picturetype' => 'cover art',
767
+
'image_height' => $imageinfo['height'],
768
+
'image_width' => $imageinfo['width'],
769
+
'data' => $ogg->saveAttachment('coverart', 0, strlen($data), $imageinfo['mime']),
770
+
);
771
+
unset($ogg);
772
+
773
+
} else {
774
+
775
+
$info['ogg']['comments'][strtolower($ThisFileInfo_ogg_comments_raw[$i]['key'])][] = $ThisFileInfo_ogg_comments_raw[$i]['value'];
776
+
777
+
}
778
+
779
+
} else {
780
+
781
+
$this->warning('[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair ['.$i.']: '.$commentstring);
782
+
783
+
}
784
+
unset($ThisFileInfo_ogg_comments_raw[$i]);
785
+
}
786
+
unset($ThisFileInfo_ogg_comments_raw);
787
+
788
+
789
+
// Replay Gain Adjustment
790
+
// http://privatewww.essex.ac.uk/~djmrob/replaygain/
791
+
if (isset($info['ogg']['comments']) && is_array($info['ogg']['comments'])) {
792
+
foreach ($info['ogg']['comments'] as $index => $commentvalue) {
793
+
switch ($index) {
794
+
case 'rg_audiophile':
795
+
case 'replaygain_album_gain':
796
+
$info['replay_gain']['album']['adjustment'] = (float) $commentvalue[0];
797
+
unset($info['ogg']['comments'][$index]);
798
+
break;
799
+
800
+
case 'rg_radio':
801
+
case 'replaygain_track_gain':
802
+
$info['replay_gain']['track']['adjustment'] = (float) $commentvalue[0];
803
+
unset($info['ogg']['comments'][$index]);
804
+
break;
805
+
806
+
case 'replaygain_album_peak':
807
+
$info['replay_gain']['album']['peak'] = (float) $commentvalue[0];
808
+
unset($info['ogg']['comments'][$index]);
809
+
break;
810
+
811
+
case 'rg_peak':
812
+
case 'replaygain_track_peak':
813
+
$info['replay_gain']['track']['peak'] = (float) $commentvalue[0];
814
+
unset($info['ogg']['comments'][$index]);
815
+
break;
816
+
817
+
case 'replaygain_reference_loudness':
818
+
$info['replay_gain']['reference_volume'] = (float) $commentvalue[0];
819
+
unset($info['ogg']['comments'][$index]);
820
+
break;
821
+
822
+
default:
823
+
// do nothing
824
+
break;
825
+
}
826
+
}
827
+
}
828
+
829
+
$this->fseek($OriginalOffset);
830
+
831
+
return true;
832
+
}
833
+
834
+
/**
835
+
* @param int $mode
836
+
*
837
+
* @return string|null
838
+
*/
839
+
public static function SpeexBandModeLookup($mode) {
840
+
static $SpeexBandModeLookup = array();
841
+
if (empty($SpeexBandModeLookup)) {
842
+
$SpeexBandModeLookup[0] = 'narrow';
843
+
$SpeexBandModeLookup[1] = 'wide';
844
+
$SpeexBandModeLookup[2] = 'ultra-wide';
845
+
}
846
+
return (isset($SpeexBandModeLookup[$mode]) ? $SpeexBandModeLookup[$mode] : null);
847
+
}
848
+
849
+
/**
850
+
* @param array $OggInfoArray
851
+
* @param int $SegmentNumber
852
+
*
853
+
* @return int
854
+
*/
855
+
public static function OggPageSegmentLength($OggInfoArray, $SegmentNumber=1) {
856
+
$segmentlength = 0;
857
+
for ($i = 0; $i < $SegmentNumber; $i++) {
858
+
$segmentlength = 0;
859
+
foreach ($OggInfoArray['segment_table'] as $key => $value) {
860
+
$segmentlength += $value;
861
+
if ($value < 255) {
862
+
break;
863
+
}
864
+
}
865
+
}
866
+
return $segmentlength;
867
+
}
868
+
869
+
/**
870
+
* @param int $nominal_bitrate
871
+
*
872
+
* @return float
873
+
*/
874
+
public static function get_quality_from_nominal_bitrate($nominal_bitrate) {
875
+
876
+
// decrease precision
877
+
$nominal_bitrate = $nominal_bitrate / 1000;
878
+
879
+
if ($nominal_bitrate < 128) {
880
+
// q-1 to q4
881
+
$qval = ($nominal_bitrate - 64) / 16;
882
+
} elseif ($nominal_bitrate < 256) {
883
+
// q4 to q8
884
+
$qval = $nominal_bitrate / 32;
885
+
} elseif ($nominal_bitrate < 320) {
886
+
// q8 to q9
887
+
$qval = ($nominal_bitrate + 256) / 64;
888
+
} else {
889
+
// q9 to q10
890
+
$qval = ($nominal_bitrate + 1300) / 180;
891
+
}
892
+
//return $qval; // 5.031324
893
+
//return intval($qval); // 5
894
+
return round($qval, 1); // 5 or 4.9
895
+
}
896
+
897
+
/**
898
+
* @param int $colorspace_id
899
+
*
900
+
* @return string|null
901
+
*/
902
+
public static function TheoraColorSpace($colorspace_id) {
903
+
// http://www.theora.org/doc/Theora.pdf (table 6.3)
904
+
static $TheoraColorSpaceLookup = array();
905
+
if (empty($TheoraColorSpaceLookup)) {
906
+
$TheoraColorSpaceLookup[0] = 'Undefined';
907
+
$TheoraColorSpaceLookup[1] = 'Rec. 470M';
908
+
$TheoraColorSpaceLookup[2] = 'Rec. 470BG';
909
+
$TheoraColorSpaceLookup[3] = 'Reserved';
910
+
}
911
+
return (isset($TheoraColorSpaceLookup[$colorspace_id]) ? $TheoraColorSpaceLookup[$colorspace_id] : null);
912
+
}
913
+
914
+
/**
915
+
* @param int $pixelformat_id
916
+
*
917
+
* @return string|null
918
+
*/
919
+
public static function TheoraPixelFormat($pixelformat_id) {
920
+
// http://www.theora.org/doc/Theora.pdf (table 6.4)
921
+
static $TheoraPixelFormatLookup = array();
922
+
if (empty($TheoraPixelFormatLookup)) {
923
+
$TheoraPixelFormatLookup[0] = '4:2:0';
924
+
$TheoraPixelFormatLookup[1] = 'Reserved';
925
+
$TheoraPixelFormatLookup[2] = '4:2:2';
926
+
$TheoraPixelFormatLookup[3] = '4:4:4';
927
+
}
928
+
return (isset($TheoraPixelFormatLookup[$pixelformat_id]) ? $TheoraPixelFormatLookup[$pixelformat_id] : null);
929
+
}
930
+
931
+
}
932
+