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<?php |
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// +----------------------------------------------------------------------+ |
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// | PHP version 5 | |
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// +----------------------------------------------------------------------+ |
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// | Copyright (c) 2002-2006 James Heinrich, Allan Hansen | |
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// +----------------------------------------------------------------------+ |
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// | This source file is subject to version 2 of the GPL license, | |
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// | that is bundled with this package in the file license.txt and is | |
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// | available through the world-wide-web at the following url: | |
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// | http://www.gnu.org/copyleft/gpl.html | |
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// +----------------------------------------------------------------------+ |
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// | getID3() - http://getid3.sourceforge.net or http://www.getid3.org | |
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// +----------------------------------------------------------------------+ |
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// | Authors: James Heinrich <info�getid3*org> | |
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// | Allan Hansen <ah�artemis*dk> | |
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// +----------------------------------------------------------------------+ |
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// | module.audio.xiph.php | |
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// | Module for analyzing Xiph.org audio file formats: | |
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// | Ogg Vorbis, FLAC, OggFLAC and Speex - not Ogg Theora | |
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// | dependencies: module.lib.image_size.php (optional) | |
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// +----------------------------------------------------------------------+ |
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// |
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// $Id: module.audio.xiph.php,v 1.5 2006/12/03 21:12:43 ah Exp $ |
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class getid3_xiph extends getid3_handler |
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{ |
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public function Analyze() |
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{ |
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$getid3 = $this->getid3; |
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if ($getid3->option_tags_images) { |
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$getid3->include_module('lib.image_size'); |
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} |
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fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
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$magic = fread($getid3->fp, 4); |
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if ('OggS' == $magic) { |
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return $this->ParseOgg(); |
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} |
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if ('fLaC' == $magic) { |
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return $this->ParseFLAC(); |
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} |
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} |
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private function ParseOgg() |
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{ |
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$getid3 = $this->getid3; |
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fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET); |
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$getid3->info['audio'] = $getid3->info['ogg'] = []; |
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$info_ogg = &$getid3->info['ogg']; |
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$info_audio = &$getid3->info['audio']; |
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$getid3->info['fileformat'] = 'ogg'; |
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//// Page 1 - Stream Header |
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$ogg_page_info = $this->ParseOggPageHeader(); |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
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if (ftell($getid3->fp) >= getid3::FREAD_BUFFER_SIZE) { |
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throw new getid3_exception('Could not find start of Ogg page in the first ' . getid3::FREAD_BUFFER_SIZE . ' bytes (this might not be an Ogg file?)'); |
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} |
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$file_data = fread($getid3->fp, $ogg_page_info['page_length']); |
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$file_data_offset = 0; |
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// OggFLAC |
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if ('fLaC' == substr($file_data, 0, 4)) { |
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$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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} // Ogg Vorbis |
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elseif ('vorbis' == substr($file_data, 1, 6)) { |
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$info_audio['dataformat'] = 'vorbis'; |
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$info_audio['lossless'] = false; |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int($file_data[0]); |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']]['stream_type'] = substr($file_data, 1, 6); // hard-coded to 'vorbis' |
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getid3_lib::ReadSequence( |
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'LittleEndian2Int', |
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$info_ogg, |
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$file_data, |
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7, |
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[ |
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'bitstreamversion' => 4, |
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'numberofchannels' => 1, |
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'samplerate' => 4, |
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'bitrate_max' => 4, |
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'bitrate_nominal' => 4, |
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'bitrate_min' => 4 |
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] |
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); |
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$n28 = getid3_lib::LittleEndian2Int($file_data{28}); |
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$info_ogg['blocksize_small'] = pow(2, $n28 & 0x0F); |
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$info_ogg['blocksize_large'] = pow(2, ($n28 & 0xF0) >> 4); |
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$info_ogg['stop_bit'] = $n28; |
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$info_audio['channels'] = $info_ogg['numberofchannels']; |
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$info_audio['sample_rate'] = $info_ogg['samplerate']; |
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$info_audio['bitrate_mode'] = 'vbr'; // overridden if actually abr |
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if (0xFFFFFFFF == $info_ogg['bitrate_max']) { |
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unset($info_ogg['bitrate_max']); |
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$info_audio['bitrate_mode'] = 'abr'; |
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} |
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if (0xFFFFFFFF == $info_ogg['bitrate_nominal']) { |
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unset($info_ogg['bitrate_nominal']); |
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} |
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if (0xFFFFFFFF == $info_ogg['bitrate_min']) { |
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unset($info_ogg['bitrate_min']); |
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$info_audio['bitrate_mode'] = 'abr'; |
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} |
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} // Speex |
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elseif ('Speex ' == substr($file_data, 0, 8)) { |
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// http://www.speex.org/manual/node10.html |
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$info_audio['dataformat'] = 'speex'; |
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$getid3->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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getid3_lib::ReadSequence( |
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'LittleEndian2Int', |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']], |
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$file_data, |
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0, |
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[ |
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'speex_string' => -8, // hard-coded to 'Speex ' |
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'speex_version' => -20, // string |
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'speex_version_id' => 4, |
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'header_size' => 4, |
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'rate' => 4, |
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'mode' => 4, |
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'mode_bitstream_version' => 4, |
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'nb_channels' => 4, |
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'bitrate' => 4, |
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'framesize' => 4, |
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'vbr' => 4, |
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'frames_per_packet' => 4, |
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'extra_headers' => 4, |
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'reserved1' => 4, |
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'reserved2' => 4 |
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] |
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); |
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$getid3->info['speex']['speex_version'] = trim($info_ogg['pageheader'][$ogg_page_info['page_seqno']]['speex_version']); |
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$getid3->info['speex']['sample_rate'] = $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['rate']; |
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$getid3->info['speex']['channels'] = $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['nb_channels']; |
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$getid3->info['speex']['vbr'] = (bool)$info_ogg['pageheader'][$ogg_page_info['page_seqno']]['vbr']; |
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$getid3->info['speex']['band_type'] = getid3_xiph::SpeexBandModeLookup($info_ogg['pageheader'][$ogg_page_info['page_seqno']]['mode']); |
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$info_audio['sample_rate'] = $getid3->info['speex']['sample_rate']; |
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$info_audio['channels'] = $getid3->info['speex']['channels']; |
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if ($getid3->info['speex']['vbr']) { |
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$info_audio['bitrate_mode'] = 'vbr'; |
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} |
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} // Unsupported Ogg file |
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else { |
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throw new getid3_exception('Expecting either "Speex " or "vorbis" identifier strings, found neither'); |
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} |
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//// Page 2 - Comment Header |
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$ogg_page_info = $this->ParseOggPageHeader(); |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
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switch ($info_audio['dataformat']) { |
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case 'vorbis': |
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$file_data = fread($getid3->fp, $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['page_length']); |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']]['packet_type'] = getid3_lib::LittleEndian2Int(substr($file_data, 0, 1)); |
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$info_ogg['pageheader'][$ogg_page_info['page_seqno']]['stream_type'] = substr($file_data, 1, 6); // hard-coded to 'vorbis' |
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$this->ParseVorbisCommentsFilepointer(); |
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break; |
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case 'flac': |
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if (!$this->FLACparseMETAdata()) { |
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throw new getid3_exception('Failed to parse FLAC headers'); |
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} |
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break; |
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case 'speex': |
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fseek($getid3->fp, $info_ogg['pageheader'][$ogg_page_info['page_seqno']]['page_length'], SEEK_CUR); |
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$this->ParseVorbisCommentsFilepointer(); |
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break; |
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} |
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//// Last Page - Number of Samples |
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fseek($getid3->fp, max($getid3->info['avdataend'] - getid3::FREAD_BUFFER_SIZE, 0), SEEK_SET); |
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$last_chunk_of_ogg = strrev(fread($getid3->fp, getid3::FREAD_BUFFER_SIZE)); |
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if ($last_OggS_postion = strpos($last_chunk_of_ogg, 'SggO')) { |
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fseek($getid3->fp, $getid3->info['avdataend'] - ($last_OggS_postion + strlen('SggO')), SEEK_SET); |
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$getid3->info['avdataend'] = ftell($getid3->fp); |
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$info_ogg['pageheader']['eos'] = $this->ParseOggPageHeader(); |
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$info_ogg['samples'] = $info_ogg['pageheader']['eos']['pcm_abs_position']; |
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$info_ogg['bitrate_average'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / ($info_ogg['samples'] / $info_audio['sample_rate']); |
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} |
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if (!empty($info_ogg['bitrate_average'])) { |
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$info_audio['bitrate'] = $info_ogg['bitrate_average']; |
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} elseif (!empty($info_ogg['bitrate_nominal'])) { |
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$info_audio['bitrate'] = $info_ogg['bitrate_nominal']; |
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} elseif (!empty($info_ogg['bitrate_min']) && !empty($info_ogg['bitrate_max'])) { |
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$info_audio['bitrate'] = ($info_ogg['bitrate_min'] + $info_ogg['bitrate_max']) / 2; |
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} |
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if (isset($info_audio['bitrate']) && !isset($getid3->info['playtime_seconds'])) { |
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$getid3->info['playtime_seconds'] = (float)((($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $info_audio['bitrate']); |
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} |
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if (isset($info_ogg['vendor'])) { |
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$info_audio['encoder'] = preg_replace('/^Encoded with /', '', $info_ogg['vendor']); |
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// Vorbis only |
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if ('vorbis' == $info_audio['dataformat']) { |
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// Vorbis 1.0 starts with Xiph.Org |
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if (preg_match('/^Xiph.Org/', $info_audio['encoder'])) { |
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if ('abr' == $info_audio['bitrate_mode']) { |
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// Set -b 128 on abr files |
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$info_audio['encoder_options'] = '-b ' . round($info_ogg['bitrate_nominal'] / 1000); |
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} elseif (('vbr' == $info_audio['bitrate_mode']) && (2 == $info_audio['channels']) && ($info_audio['sample_rate'] >= 44100) && ($info_audio['sample_rate'] <= 48000)) { |
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// Set -q N on vbr files |
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$info_audio['encoder_options'] = '-q ' . getid3_xiph::GetQualityFromNominalBitrate($info_ogg['bitrate_nominal']); |
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} |
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} |
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if (empty($info_audio['encoder_options']) && !empty($info_ogg['bitrate_nominal'])) { |
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$info_audio['encoder_options'] = 'Nominal bitrate: ' . intval(round($info_ogg['bitrate_nominal'] / 1000)) . 'kbps'; |
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} |
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} |
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} |
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return true; |
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} |
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248
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private function ParseOggPageHeader() |
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249
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{ |
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250
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$getid3 = $this->getid3; |
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252
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// http://xiph.org/ogg/vorbis/doc/framing.html |
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$ogg_header['page_start_offset'] = ftell($getid3->fp); // where we started from in the file |
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254
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255
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$file_data = fread($getid3->fp, getid3::FREAD_BUFFER_SIZE); |
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$file_data_offset = 0; |
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while (('OggS' != substr($file_data, $file_data_offset++, 4))) { |
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if ((ftell($getid3->fp) - $ogg_header['page_start_offset']) >= getid3::FREAD_BUFFER_SIZE) { |
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// should be found before here |
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return false; |
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} |
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if ((($file_data_offset + 28) > strlen($file_data)) || (strlen($file_data) < 28)) { |
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264
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if (feof($getid3->fp) || (false === ($file_data .= fread($getid3->fp, getid3::FREAD_BUFFER_SIZE)))) { |
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// get some more data, unless eof, in which case fail |
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return false; |
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} |
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} |
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} |
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$file_data_offset += 3; // page, delimited by 'OggS' |
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getid3_lib::ReadSequence( |
|
274
|
|
|
'LittleEndian2Int', |
|
275
|
|
|
$ogg_header, |
|
276
|
|
|
$file_data, |
|
277
|
|
|
$file_data_offset, |
|
278
|
|
|
[ |
|
279
|
|
|
'stream_structver' => 1, |
|
280
|
|
|
'flags_raw' => 1, |
|
281
|
|
|
'pcm_abs_position' => 8, |
|
282
|
|
|
'stream_serialno' => 4, |
|
283
|
|
|
'page_seqno' => 4, |
|
284
|
|
|
'page_checksum' => 4, |
|
285
|
|
|
'page_segments' => 1 |
|
286
|
|
|
] |
|
287
|
|
|
); |
|
288
|
|
|
|
|
289
|
|
|
$file_data_offset += 23; |
|
290
|
|
|
|
|
291
|
|
|
$ogg_header['flags']['fresh'] = (bool)($ogg_header['flags_raw'] & 0x01); // fresh packet |
|
292
|
|
|
$ogg_header['flags']['bos'] = (bool)($ogg_header['flags_raw'] & 0x02); // first page of logical bitstream (bos) |
|
293
|
|
|
$ogg_header['flags']['eos'] = (bool)($ogg_header['flags_raw'] & 0x04); // last page of logical bitstream (eos) |
|
294
|
|
|
|
|
295
|
|
|
$ogg_header['page_length'] = 0; |
|
296
|
|
|
for ($i = 0; $i < $ogg_header['page_segments']; $i++) { |
|
297
|
|
|
$ogg_header['segment_table'][$i] = getid3_lib::LittleEndian2Int($file_data{$file_data_offset++}); |
|
298
|
|
|
$ogg_header['page_length'] += $ogg_header['segment_table'][$i]; |
|
299
|
|
|
} |
|
300
|
|
|
$ogg_header['header_end_offset'] = $ogg_header['page_start_offset'] + $file_data_offset; |
|
301
|
|
|
$ogg_header['page_end_offset'] = $ogg_header['header_end_offset'] + $ogg_header['page_length']; |
|
302
|
|
|
fseek($getid3->fp, $ogg_header['header_end_offset'], SEEK_SET); |
|
303
|
|
|
|
|
304
|
|
|
return $ogg_header; |
|
305
|
|
|
} |
|
306
|
|
|
|
|
307
|
|
|
private function ParseVorbisCommentsFilepointer() |
|
308
|
|
|
{ |
|
309
|
|
|
$getid3 = $this->getid3; |
|
310
|
|
|
|
|
311
|
|
|
$original_offset = ftell($getid3->fp); |
|
312
|
|
|
$comment_start_offset = $original_offset; |
|
313
|
|
|
$comment_data_offset = 0; |
|
314
|
|
|
$vorbis_comment_page = 1; |
|
315
|
|
|
|
|
316
|
|
|
switch ($getid3->info['audio']['dataformat']) { |
|
317
|
|
|
case 'vorbis': |
|
318
|
|
|
$comment_start_offset = $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_start_offset']; // Second Ogg page, after header block |
|
319
|
|
|
fseek($getid3->fp, $comment_start_offset, SEEK_SET); |
|
320
|
|
|
$comment_data_offset = 27 + $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_segments']; |
|
321
|
|
|
$comment_data = fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1) + $comment_data_offset); |
|
322
|
|
|
$comment_data_offset += (strlen('vorbis') + 1); |
|
323
|
|
|
break; |
|
324
|
|
|
|
|
325
|
|
|
case 'flac': |
|
326
|
|
|
fseek($getid3->fp, $getid3->info['flac']['VORBIS_COMMENT']['raw']['offset'] + 4, SEEK_SET); |
|
327
|
|
|
$comment_data = fread($getid3->fp, $getid3->info['flac']['VORBIS_COMMENT']['raw']['block_length']); |
|
328
|
|
|
break; |
|
329
|
|
|
|
|
330
|
|
|
case 'speex': |
|
331
|
|
|
$comment_start_offset = $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_start_offset']; // Second Ogg page, after header block |
|
332
|
|
|
fseek($getid3->fp, $comment_start_offset, SEEK_SET); |
|
333
|
|
|
$comment_data_offset = 27 + $getid3->info['ogg']['pageheader'][$vorbis_comment_page]['page_segments']; |
|
334
|
|
|
$comment_data = fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1) + $comment_data_offset); |
|
335
|
|
|
break; |
|
336
|
|
|
|
|
337
|
|
|
default: |
|
338
|
|
|
return false; |
|
339
|
|
|
} |
|
340
|
|
|
|
|
341
|
|
|
$vendor_size = getid3_lib::LittleEndian2Int(substr($comment_data, $comment_data_offset, 4)); |
|
342
|
|
|
$comment_data_offset += 4; |
|
343
|
|
|
|
|
344
|
|
|
$getid3->info['ogg']['vendor'] = substr($comment_data, $comment_data_offset, $vendor_size); |
|
345
|
|
|
$comment_data_offset += $vendor_size; |
|
346
|
|
|
|
|
347
|
|
|
$comments_count = getid3_lib::LittleEndian2Int(substr($comment_data, $comment_data_offset, 4)); |
|
348
|
|
|
$comment_data_offset += 4; |
|
349
|
|
|
|
|
350
|
|
|
$getid3->info['avdataoffset'] = $comment_start_offset + $comment_data_offset; |
|
351
|
|
|
|
|
352
|
|
|
for ($i = 0; $i < $comments_count; $i++) { |
|
353
|
|
|
$getid3->info['ogg']['comments_raw'][$i]['dataoffset'] = $comment_start_offset + $comment_data_offset; |
|
354
|
|
|
|
|
355
|
|
|
if (ftell($getid3->fp) < ($getid3->info['ogg']['comments_raw'][$i]['dataoffset'] + 4)) { |
|
356
|
|
|
$vorbis_comment_page++; |
|
357
|
|
|
|
|
358
|
|
|
$ogg_page_info = $this->ParseOggPageHeader(); |
|
359
|
|
|
$getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
|
360
|
|
|
|
|
361
|
|
|
// First, save what we haven't read yet |
|
362
|
|
|
$as_yet_unused_data = substr($comment_data, $comment_data_offset); |
|
363
|
|
|
|
|
364
|
|
|
// Then take that data off the end |
|
365
|
|
|
$comment_data = substr($comment_data, 0, $comment_data_offset); |
|
366
|
|
|
|
|
367
|
|
|
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
|
368
|
|
|
$comment_data .= str_repeat("\x00", 27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
|
369
|
|
|
$comment_data_offset += (27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
|
370
|
|
|
|
|
371
|
|
|
// Finally, stick the unused data back on the end |
|
372
|
|
|
$comment_data .= $as_yet_unused_data; |
|
373
|
|
|
|
|
374
|
|
|
$comment_data .= fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1)); |
|
375
|
|
|
} |
|
376
|
|
|
$getid3->info['ogg']['comments_raw'][$i]['size'] = getid3_lib::LittleEndian2Int(substr($comment_data, $comment_data_offset, 4)); |
|
377
|
|
|
|
|
378
|
|
|
// replace avdataoffset with position just after the last vorbiscomment |
|
379
|
|
|
$getid3->info['avdataoffset'] = $getid3->info['ogg']['comments_raw'][$i]['dataoffset'] + $getid3->info['ogg']['comments_raw'][$i]['size'] + 4; |
|
380
|
|
|
|
|
381
|
|
|
$comment_data_offset += 4; |
|
382
|
|
|
while ((strlen($comment_data) - $comment_data_offset) < $getid3->info['ogg']['comments_raw'][$i]['size']) { |
|
383
|
|
|
if (($getid3->info['ogg']['comments_raw'][$i]['size'] > $getid3->info['avdataend']) || ($getid3->info['ogg']['comments_raw'][$i]['size'] < 0)) { |
|
384
|
|
|
throw new getid3_exception('Invalid Ogg comment size (comment #' . $i . ', claims to be ' . number_format($getid3->info['ogg']['comments_raw'][$i]['size']) . ' bytes) - aborting reading comments'); |
|
385
|
|
|
} |
|
386
|
|
|
|
|
387
|
|
|
$vorbis_comment_page++; |
|
388
|
|
|
|
|
389
|
|
|
$ogg_page_info = $this->ParseOggPageHeader(); |
|
390
|
|
|
$getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']] = $ogg_page_info; |
|
391
|
|
|
|
|
392
|
|
|
// First, save what we haven't read yet |
|
393
|
|
|
$as_yet_unused_data = substr($comment_data, $comment_data_offset); |
|
394
|
|
|
|
|
395
|
|
|
// Then take that data off the end |
|
396
|
|
|
$comment_data = substr($comment_data, 0, $comment_data_offset); |
|
397
|
|
|
|
|
398
|
|
|
// Add [headerlength] bytes of dummy data for the Ogg Page Header, just to keep absolute offsets correct |
|
399
|
|
|
$comment_data .= str_repeat("\x00", 27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
|
400
|
|
|
$comment_data_offset += (27 + $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_segments']); |
|
401
|
|
|
|
|
402
|
|
|
// Finally, stick the unused data back on the end |
|
403
|
|
|
$comment_data .= $as_yet_unused_data; |
|
404
|
|
|
|
|
405
|
|
|
//$comment_data .= fread($getid3->fp, $getid3->info['ogg']['pageheader'][$ogg_page_info['page_seqno']]['page_length']); |
|
406
|
|
|
$comment_data .= fread($getid3->fp, getid3_xiph::OggPageSegmentLength($getid3->info['ogg']['pageheader'][$vorbis_comment_page], 1)); |
|
407
|
|
|
//$filebaseoffset += $ogg_page_info['header_end_offset'] - $ogg_page_info['page_start_offset']; |
|
408
|
|
|
} |
|
409
|
|
|
$comment_string = substr($comment_data, $comment_data_offset, $getid3->info['ogg']['comments_raw'][$i]['size']); |
|
410
|
|
|
$comment_data_offset += $getid3->info['ogg']['comments_raw'][$i]['size']; |
|
411
|
|
|
|
|
412
|
|
|
if (!$comment_string) { |
|
413
|
|
|
// no comment? |
|
414
|
|
|
$getid3->warning('Blank Ogg comment [' . $i . ']'); |
|
415
|
|
|
} elseif (strstr($comment_string, '=')) { |
|
416
|
|
|
$comment_exploded = explode('=', $comment_string, 2); |
|
417
|
|
|
$getid3->info['ogg']['comments_raw'][$i]['key'] = strtoupper($comment_exploded[0]); |
|
418
|
|
|
$getid3->info['ogg']['comments_raw'][$i]['value'] = @$comment_exploded[1]; |
|
419
|
|
|
$getid3->info['ogg']['comments_raw'][$i]['data'] = base64_decode($getid3->info['ogg']['comments_raw'][$i]['value']); |
|
420
|
|
|
|
|
421
|
|
|
$getid3->info['ogg']['comments'][strtolower($getid3->info['ogg']['comments_raw'][$i]['key'])][] = $getid3->info['ogg']['comments_raw'][$i]['value']; |
|
422
|
|
|
|
|
423
|
|
|
if ($getid3->option_tags_images) { |
|
424
|
|
|
$image_chunk_check = getid3_lib_image_size::get($getid3->info['ogg']['comments_raw'][$i]['data']); |
|
425
|
|
|
$getid3->info['ogg']['comments_raw'][$i]['image_mime'] = image_type_to_mime_type($image_chunk_check[2]); |
|
426
|
|
|
} |
|
427
|
|
|
|
|
428
|
|
|
if (!@$getid3->info['ogg']['comments_raw'][$i]['image_mime'] || ('application/octet-stream' == $getid3->info['ogg']['comments_raw'][$i]['image_mime'])) { |
|
429
|
|
|
unset($getid3->info['ogg']['comments_raw'][$i]['image_mime']); |
|
430
|
|
|
unset($getid3->info['ogg']['comments_raw'][$i]['data']); |
|
431
|
|
|
} |
|
432
|
|
|
} else { |
|
433
|
|
|
$getid3->warning('[known problem with CDex >= v1.40, < v1.50b7] Invalid Ogg comment name/value pair [' . $i . ']: ' . $comment_string); |
|
434
|
|
|
} |
|
435
|
|
|
} |
|
436
|
|
|
|
|
437
|
|
|
// Replay Gain Adjustment |
|
438
|
|
|
// http://privatewww.essex.ac.uk/~djmrob/replaygain/ |
|
439
|
|
|
if (isset($getid3->info['ogg']['comments']) && is_array($getid3->info['ogg']['comments'])) { |
|
440
|
|
|
foreach ($getid3->info['ogg']['comments'] as $index => $commentvalue) { |
|
441
|
|
|
switch ($index) { |
|
442
|
|
|
case 'rg_audiophile': |
|
443
|
|
|
case 'replaygain_album_gain': |
|
444
|
|
|
$getid3->info['replay_gain']['album']['adjustment'] = (float)$commentvalue[0]; |
|
445
|
|
|
unset($getid3->info['ogg']['comments'][$index]); |
|
446
|
|
|
break; |
|
447
|
|
|
|
|
448
|
|
|
case 'rg_radio': |
|
449
|
|
|
case 'replaygain_track_gain': |
|
450
|
|
|
$getid3->info['replay_gain']['track']['adjustment'] = (float)$commentvalue[0]; |
|
451
|
|
|
unset($getid3->info['ogg']['comments'][$index]); |
|
452
|
|
|
break; |
|
453
|
|
|
|
|
454
|
|
|
case 'replaygain_album_peak': |
|
455
|
|
|
$getid3->info['replay_gain']['album']['peak'] = (float)$commentvalue[0]; |
|
456
|
|
|
unset($getid3->info['ogg']['comments'][$index]); |
|
457
|
|
|
break; |
|
458
|
|
|
|
|
459
|
|
|
case 'rg_peak': |
|
460
|
|
|
case 'replaygain_track_peak': |
|
461
|
|
|
$getid3->info['replay_gain']['track']['peak'] = (float)$commentvalue[0]; |
|
462
|
|
|
unset($getid3->info['ogg']['comments'][$index]); |
|
463
|
|
|
break; |
|
464
|
|
|
|
|
465
|
|
|
case 'replaygain_reference_loudness': |
|
466
|
|
|
$getid3->info['replay_gain']['reference_volume'] = (float)$commentvalue[0]; |
|
467
|
|
|
unset($getid3->info['ogg']['comments'][$index]); |
|
468
|
|
|
break; |
|
469
|
|
|
} |
|
470
|
|
|
} |
|
471
|
|
|
} |
|
472
|
|
|
|
|
473
|
|
|
fseek($getid3->fp, $original_offset, SEEK_SET); |
|
474
|
|
|
|
|
475
|
|
|
return true; |
|
476
|
|
|
} |
|
477
|
|
|
|
|
478
|
|
|
private function ParseFLAC() |
|
479
|
|
|
{ |
|
480
|
|
|
$getid3 = $this->getid3; |
|
481
|
|
|
|
|
482
|
|
|
// http://flac.sourceforge.net/format.html |
|
483
|
|
|
|
|
484
|
|
|
$getid3->info['fileformat'] = 'flac'; |
|
485
|
|
|
$getid3->info['audio']['dataformat'] = 'flac'; |
|
486
|
|
|
$getid3->info['audio']['bitrate_mode'] = 'vbr'; |
|
487
|
|
|
$getid3->info['audio']['lossless'] = true; |
|
488
|
|
|
|
|
489
|
|
|
return $this->FLACparseMETAdata(); |
|
490
|
|
|
} |
|
491
|
|
|
|
|
492
|
|
|
private function FLACparseMETAdata() |
|
493
|
|
|
{ |
|
494
|
|
|
$getid3 = $this->getid3; |
|
495
|
|
|
|
|
496
|
|
|
do { |
|
497
|
|
|
$meta_data_block_offset = ftell($getid3->fp); |
|
498
|
|
|
$meta_data_block_header = fread($getid3->fp, 4); |
|
499
|
|
|
$meta_data_last_block_flag = (bool)(getid3_lib::BigEndian2Int($meta_data_block_header[0]) & 0x80); |
|
500
|
|
|
$meta_data_block_type = getid3_lib::BigEndian2Int($meta_data_block_header[0]) & 0x7F; |
|
501
|
|
|
$meta_data_block_length = getid3_lib::BigEndian2Int(substr($meta_data_block_header, 1, 3)); |
|
502
|
|
|
$meta_data_block_type_text = getid3_xiph::FLACmetaBlockTypeLookup($meta_data_block_type); |
|
503
|
|
|
|
|
504
|
|
|
if ($meta_data_block_length < 0) { |
|
505
|
|
|
throw new getid3_exception('corrupt or invalid METADATA_BLOCK_HEADER.BLOCK_TYPE (' . $meta_data_block_type . ') at offset ' . $meta_data_block_offset); |
|
506
|
|
|
} |
|
507
|
|
|
|
|
508
|
|
|
$getid3->info['flac'][$meta_data_block_type_text]['raw'] = [ |
|
509
|
|
|
'offset' => $meta_data_block_offset, |
|
510
|
|
|
'last_meta_block' => $meta_data_last_block_flag, |
|
511
|
|
|
'block_type' => $meta_data_block_type, |
|
512
|
|
|
'block_type_text' => $meta_data_block_type_text, |
|
513
|
|
|
'block_length' => $meta_data_block_length, |
|
514
|
|
|
'block_data' => @fread($getid3->fp, $meta_data_block_length) |
|
515
|
|
|
]; |
|
516
|
|
|
$getid3->info['avdataoffset'] = ftell($getid3->fp); |
|
517
|
|
|
|
|
518
|
|
|
switch ($meta_data_block_type_text) { |
|
519
|
|
|
case 'STREAMINFO': |
|
520
|
|
|
if (!$this->FLACparseSTREAMINFO($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
|
521
|
|
|
return false; |
|
522
|
|
|
} |
|
523
|
|
|
break; |
|
524
|
|
|
|
|
525
|
|
|
case 'PADDING': |
|
526
|
|
|
// ignore |
|
527
|
|
|
break; |
|
528
|
|
|
|
|
529
|
|
|
case 'APPLICATION': |
|
530
|
|
|
if (!$this->FLACparseAPPLICATION($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
|
531
|
|
|
return false; |
|
532
|
|
|
} |
|
533
|
|
|
break; |
|
534
|
|
|
|
|
535
|
|
|
case 'SEEKTABLE': |
|
536
|
|
|
if (!$this->FLACparseSEEKTABLE($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
|
537
|
|
|
return false; |
|
538
|
|
|
} |
|
539
|
|
|
break; |
|
540
|
|
|
|
|
541
|
|
|
case 'VORBIS_COMMENT': |
|
542
|
|
|
$old_offset = ftell($getid3->fp); |
|
543
|
|
|
fseek($getid3->fp, 0 - $meta_data_block_length, SEEK_CUR); |
|
544
|
|
|
$this->ParseVorbisCommentsFilepointer($getid3->fp, $getid3->info); |
|
|
|
|
|
|
545
|
|
|
fseek($getid3->fp, $old_offset, SEEK_SET); |
|
546
|
|
|
break; |
|
547
|
|
|
|
|
548
|
|
|
case 'CUESHEET': |
|
549
|
|
|
if (!$this->FLACparseCUESHEET($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
|
550
|
|
|
return false; |
|
551
|
|
|
} |
|
552
|
|
|
break; |
|
553
|
|
|
|
|
554
|
|
|
case 'PICTURE': |
|
555
|
|
|
if (!$this->FLACparsePICTURE($getid3->info['flac'][$meta_data_block_type_text]['raw']['block_data'])) { |
|
556
|
|
|
return false; |
|
557
|
|
|
} |
|
558
|
|
|
break; |
|
559
|
|
|
|
|
560
|
|
|
default: |
|
561
|
|
|
$getid3->warning('Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE (' . $meta_data_block_type . ') at offset ' . $meta_data_block_offset); |
|
562
|
|
|
} |
|
563
|
|
|
} while (false === $meta_data_last_block_flag); |
|
564
|
|
|
|
|
565
|
|
|
if (isset($getid3->info['flac']['STREAMINFO'])) { |
|
566
|
|
|
$getid3->info['flac']['compressed_audio_bytes'] = $getid3->info['avdataend'] - $getid3->info['avdataoffset']; |
|
567
|
|
|
$getid3->info['flac']['uncompressed_audio_bytes'] = $getid3->info['flac']['STREAMINFO']['samples_stream'] * $getid3->info['flac']['STREAMINFO']['channels'] * ($getid3->info['flac']['STREAMINFO']['bits_per_sample'] / 8); |
|
568
|
|
|
$getid3->info['flac']['compression_ratio'] = $getid3->info['flac']['compressed_audio_bytes'] / $getid3->info['flac']['uncompressed_audio_bytes']; |
|
569
|
|
|
} |
|
570
|
|
|
|
|
571
|
|
|
// set md5_data_source - built into flac 0.5+ |
|
572
|
|
|
if (isset($getid3->info['flac']['STREAMINFO']['audio_signature'])) { |
|
573
|
|
|
if ($getid3->info['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) { |
|
574
|
|
|
$getid3->warning('FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)'); |
|
575
|
|
|
} else { |
|
576
|
|
|
$getid3->info['md5_data_source'] = ''; |
|
577
|
|
|
$md5 = $getid3->info['flac']['STREAMINFO']['audio_signature']; |
|
578
|
|
|
for ($i = 0; $i < strlen($md5); $i++) { |
|
579
|
|
|
$getid3->info['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT); |
|
580
|
|
|
} |
|
581
|
|
|
if (!preg_match('/^[0-9a-f]{32}$/', $getid3->info['md5_data_source'])) { |
|
582
|
|
|
unset($getid3->info['md5_data_source']); |
|
583
|
|
|
} |
|
584
|
|
|
} |
|
585
|
|
|
} |
|
586
|
|
|
|
|
587
|
|
|
$getid3->info['audio']['bits_per_sample'] = $getid3->info['flac']['STREAMINFO']['bits_per_sample']; |
|
588
|
|
|
if (8 == $getid3->info['audio']['bits_per_sample']) { |
|
589
|
|
|
// special case |
|
590
|
|
|
// must invert sign bit on all data bytes before MD5'ing to match FLAC's calculated value |
|
591
|
|
|
// MD5sum calculates on unsigned bytes, but FLAC calculated MD5 on 8-bit audio data as signed |
|
592
|
|
|
$getid3->warning('FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file'); |
|
593
|
|
|
} |
|
594
|
|
|
if (!empty($getid3->info['ogg']['vendor'])) { |
|
595
|
|
|
$getid3->info['audio']['encoder'] = $getid3->info['ogg']['vendor']; |
|
596
|
|
|
} |
|
597
|
|
|
|
|
598
|
|
|
return true; |
|
599
|
|
|
} |
|
600
|
|
|
|
|
601
|
|
|
private function FLACparseSTREAMINFO($meta_data_block_data) |
|
602
|
|
|
{ |
|
603
|
|
|
$getid3 = $this->getid3; |
|
604
|
|
|
|
|
605
|
|
|
getid3_lib::ReadSequence( |
|
606
|
|
|
'BigEndian2Int', |
|
607
|
|
|
$getid3->info['flac']['STREAMINFO'], |
|
608
|
|
|
$meta_data_block_data, |
|
609
|
|
|
0, |
|
610
|
|
|
[ |
|
611
|
|
|
'min_block_size' => 2, |
|
612
|
|
|
'max_block_size' => 2, |
|
613
|
|
|
'min_frame_size' => 3, |
|
614
|
|
|
'max_frame_size' => 3 |
|
615
|
|
|
] |
|
616
|
|
|
); |
|
617
|
|
|
|
|
618
|
|
|
$sample_rate_channels_sample_bits_stream_samples = getid3_lib::BigEndian2Bin(substr($meta_data_block_data, 10, 8)); |
|
619
|
|
|
|
|
620
|
|
|
$getid3->info['flac']['STREAMINFO']['sample_rate'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 0, 20)); |
|
621
|
|
|
$getid3->info['flac']['STREAMINFO']['channels'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 20, 3)) + 1; |
|
622
|
|
|
$getid3->info['flac']['STREAMINFO']['bits_per_sample'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 23, 5)) + 1; |
|
623
|
|
|
$getid3->info['flac']['STREAMINFO']['samples_stream'] = bindec(substr($sample_rate_channels_sample_bits_stream_samples, 28, 36)); // bindec() returns float in case of int overrun |
|
624
|
|
|
$getid3->info['flac']['STREAMINFO']['audio_signature'] = substr($meta_data_block_data, 18, 16); |
|
625
|
|
|
|
|
626
|
|
|
if (!empty($getid3->info['flac']['STREAMINFO']['sample_rate'])) { |
|
627
|
|
|
$getid3->info['audio']['bitrate_mode'] = 'vbr'; |
|
628
|
|
|
$getid3->info['audio']['sample_rate'] = $getid3->info['flac']['STREAMINFO']['sample_rate']; |
|
629
|
|
|
$getid3->info['audio']['channels'] = $getid3->info['flac']['STREAMINFO']['channels']; |
|
630
|
|
|
$getid3->info['audio']['bits_per_sample'] = $getid3->info['flac']['STREAMINFO']['bits_per_sample']; |
|
631
|
|
|
$getid3->info['playtime_seconds'] = $getid3->info['flac']['STREAMINFO']['samples_stream'] / $getid3->info['flac']['STREAMINFO']['sample_rate']; |
|
632
|
|
|
$getid3->info['audio']['bitrate'] = (($getid3->info['avdataend'] - $getid3->info['avdataoffset']) * 8) / $getid3->info['playtime_seconds']; |
|
633
|
|
|
} else { |
|
634
|
|
|
throw new getid3_exception('Corrupt METAdata block: STREAMINFO'); |
|
635
|
|
|
} |
|
636
|
|
|
|
|
637
|
|
|
unset($getid3->info['flac']['STREAMINFO']['raw']); |
|
638
|
|
|
|
|
639
|
|
|
return true; |
|
640
|
|
|
} |
|
641
|
|
|
|
|
642
|
|
|
private function FLACparseAPPLICATION($meta_data_block_data) |
|
643
|
|
|
{ |
|
644
|
|
|
$getid3 = $this->getid3; |
|
645
|
|
|
|
|
646
|
|
|
$application_id = getid3_lib::BigEndian2Int(substr($meta_data_block_data, 0, 4)); |
|
647
|
|
|
|
|
648
|
|
|
$getid3->info['flac']['APPLICATION'][$application_id]['name'] = getid3_xiph::FLACapplicationIDLookup($application_id); |
|
649
|
|
|
$getid3->info['flac']['APPLICATION'][$application_id]['data'] = substr($meta_data_block_data, 4); |
|
650
|
|
|
|
|
651
|
|
|
unset($getid3->info['flac']['APPLICATION']['raw']); |
|
652
|
|
|
|
|
653
|
|
|
return true; |
|
654
|
|
|
} |
|
655
|
|
|
|
|
656
|
|
|
private function FLACparseSEEKTABLE($meta_data_block_data) |
|
657
|
|
|
{ |
|
658
|
|
|
$getid3 = $this->getid3; |
|
659
|
|
|
|
|
660
|
|
|
$offset = 0; |
|
661
|
|
|
$meta_data_block_length = strlen($meta_data_block_data); |
|
662
|
|
|
while ($offset < $meta_data_block_length) { |
|
663
|
|
|
$sample_number_string = substr($meta_data_block_data, $offset, 8); |
|
664
|
|
|
$offset += 8; |
|
665
|
|
|
if ("\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF" == $sample_number_string) { |
|
666
|
|
|
// placeholder point |
|
667
|
|
|
@$getid3->info['flac']['SEEKTABLE']['placeholders']++; |
|
668
|
|
|
$offset += 10; |
|
669
|
|
|
} else { |
|
670
|
|
|
$sample_number = getid3_lib::BigEndian2Int($sample_number_string); |
|
671
|
|
|
|
|
672
|
|
|
$getid3->info['flac']['SEEKTABLE'][$sample_number]['offset'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 8)); |
|
673
|
|
|
$offset += 8; |
|
674
|
|
|
|
|
675
|
|
|
$getid3->info['flac']['SEEKTABLE'][$sample_number]['samples'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 2)); |
|
676
|
|
|
$offset += 2; |
|
677
|
|
|
} |
|
678
|
|
|
} |
|
679
|
|
|
|
|
680
|
|
|
unset($getid3->info['flac']['SEEKTABLE']['raw']); |
|
681
|
|
|
|
|
682
|
|
|
return true; |
|
683
|
|
|
} |
|
684
|
|
|
|
|
685
|
|
|
private function FLACparseCUESHEET($meta_data_block_data) |
|
686
|
|
|
{ |
|
687
|
|
|
$getid3 = $this->getid3; |
|
688
|
|
|
|
|
689
|
|
|
$getid3->info['flac']['CUESHEET']['media_catalog_number'] = trim(substr($meta_data_block_data, 0, 128), "\0"); |
|
690
|
|
|
$getid3->info['flac']['CUESHEET']['lead_in_samples'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, 128, 8)); |
|
691
|
|
|
$getid3->info['flac']['CUESHEET']['flags']['is_cd'] = (bool)(getid3_lib::BigEndian2Int($meta_data_block_data[136]) & 0x80); |
|
692
|
|
|
$getid3->info['flac']['CUESHEET']['number_tracks'] = getid3_lib::BigEndian2Int($meta_data_block_data[395]); |
|
693
|
|
|
|
|
694
|
|
|
$offset = 396; |
|
695
|
|
|
|
|
696
|
|
|
for ($track = 0; $track < $getid3->info['flac']['CUESHEET']['number_tracks']; $track++) { |
|
697
|
|
|
$track_sample_offset = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 8)); |
|
698
|
|
|
$offset += 8; |
|
699
|
|
|
|
|
700
|
|
|
$track_number = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
|
701
|
|
|
|
|
702
|
|
|
$getid3->info['flac']['CUESHEET']['tracks'][$track_number]['sample_offset'] = $track_sample_offset; |
|
703
|
|
|
$getid3->info['flac']['CUESHEET']['tracks'][$track_number]['isrc'] = substr($meta_data_block_data, $offset, 12); |
|
704
|
|
|
$offset += 12; |
|
705
|
|
|
|
|
706
|
|
|
$track_flags_raw = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
|
707
|
|
|
$getid3->info['flac']['CUESHEET']['tracks'][$track_number]['flags']['is_audio'] = (bool)($track_flags_raw & 0x80); |
|
708
|
|
|
$getid3->info['flac']['CUESHEET']['tracks'][$track_number]['flags']['pre_emphasis'] = (bool)($track_flags_raw & 0x40); |
|
709
|
|
|
|
|
710
|
|
|
$offset += 13; // reserved |
|
711
|
|
|
|
|
712
|
|
|
$getid3->info['flac']['CUESHEET']['tracks'][$track_number]['index_points'] = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
|
713
|
|
|
|
|
714
|
|
|
for ($index = 0; $index < $getid3->info['flac']['CUESHEET']['tracks'][$track_number]['index_points']; $index++) { |
|
715
|
|
|
$index_sample_offset = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 8)); |
|
716
|
|
|
$offset += 8; |
|
717
|
|
|
|
|
718
|
|
|
$index_number = getid3_lib::BigEndian2Int($meta_data_block_data{$offset++}); |
|
719
|
|
|
$getid3->info['flac']['CUESHEET']['tracks'][$track_number]['indexes'][$index_number] = $index_sample_offset; |
|
720
|
|
|
|
|
721
|
|
|
$offset += 3; // reserved |
|
722
|
|
|
} |
|
723
|
|
|
} |
|
724
|
|
|
|
|
725
|
|
|
unset($getid3->info['flac']['CUESHEET']['raw']); |
|
726
|
|
|
|
|
727
|
|
|
return true; |
|
728
|
|
|
} |
|
729
|
|
|
|
|
730
|
|
|
private function FLACparsePICTURE($meta_data_block_data) |
|
731
|
|
|
{ |
|
732
|
|
|
$getid3 = $this->getid3; |
|
733
|
|
|
|
|
734
|
|
|
$picture = &$getid3->info['flac']['PICTURE'][sizeof($getid3->info['flac']['PICTURE']) - 1]; |
|
735
|
|
|
|
|
736
|
|
|
$offset = 0; |
|
737
|
|
|
|
|
738
|
|
|
$picture['type'] = $this->FLACpictureTypeLookup(getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4))); |
|
739
|
|
|
$offset += 4; |
|
740
|
|
|
|
|
741
|
|
|
$length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
742
|
|
|
$offset += 4; |
|
743
|
|
|
|
|
744
|
|
|
$picture['mime_type'] = substr($meta_data_block_data, $offset, $length); |
|
745
|
|
|
$offset += $length; |
|
746
|
|
|
|
|
747
|
|
|
$length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
748
|
|
|
$offset += 4; |
|
749
|
|
|
|
|
750
|
|
|
$picture['description'] = substr($meta_data_block_data, $offset, $length); |
|
751
|
|
|
$offset += $length; |
|
752
|
|
|
|
|
753
|
|
|
$picture['width'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
754
|
|
|
$offset += 4; |
|
755
|
|
|
|
|
756
|
|
|
$picture['height'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
757
|
|
|
$offset += 4; |
|
758
|
|
|
|
|
759
|
|
|
$picture['color_depth'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
760
|
|
|
$offset += 4; |
|
761
|
|
|
|
|
762
|
|
|
$picture['colors_indexed'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
763
|
|
|
$offset += 4; |
|
764
|
|
|
|
|
765
|
|
|
$length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); |
|
766
|
|
|
$offset += 4; |
|
767
|
|
|
|
|
768
|
|
|
$picture['image_data'] = substr($meta_data_block_data, $offset, $length); |
|
769
|
|
|
$offset += $length; |
|
770
|
|
|
|
|
771
|
|
|
unset($getid3->info['flac']['PICTURE']['raw']); |
|
772
|
|
|
|
|
773
|
|
|
return true; |
|
774
|
|
|
} |
|
775
|
|
|
|
|
776
|
|
|
public static function SpeexBandModeLookup($mode) |
|
777
|
|
|
{ |
|
778
|
|
|
static $lookup = [ |
|
779
|
|
|
0 => 'narrow', |
|
780
|
|
|
1 => 'wide', |
|
781
|
|
|
2 => 'ultra-wide' |
|
782
|
|
|
]; |
|
783
|
|
|
return (isset($lookup[$mode]) ? $lookup[$mode] : null); |
|
784
|
|
|
} |
|
785
|
|
|
|
|
786
|
|
|
public static function OggPageSegmentLength($ogg_info_array, $segment_number = 1) |
|
787
|
|
|
{ |
|
788
|
|
|
for ($i = 0; $i < $segment_number; $i++) { |
|
789
|
|
|
$segment_length = 0; |
|
790
|
|
|
foreach ($ogg_info_array['segment_table'] as $key => $value) { |
|
791
|
|
|
$segment_length += $value; |
|
792
|
|
|
if ($value < 255) { |
|
793
|
|
|
break; |
|
794
|
|
|
} |
|
795
|
|
|
} |
|
796
|
|
|
} |
|
797
|
|
|
return $segment_length; |
|
|
|
|
|
|
798
|
|
|
} |
|
799
|
|
|
|
|
800
|
|
|
public static function GetQualityFromNominalBitrate($nominal_bitrate) |
|
801
|
|
|
{ |
|
802
|
|
|
// decrease precision |
|
803
|
|
|
$nominal_bitrate = $nominal_bitrate / 1000; |
|
804
|
|
|
|
|
805
|
|
|
if ($nominal_bitrate < 128) { |
|
806
|
|
|
// q-1 to q4 |
|
807
|
|
|
$qval = ($nominal_bitrate - 64) / 16; |
|
808
|
|
|
} elseif ($nominal_bitrate < 256) { |
|
809
|
|
|
// q4 to q8 |
|
810
|
|
|
$qval = $nominal_bitrate / 32; |
|
811
|
|
|
} elseif ($nominal_bitrate < 320) { |
|
812
|
|
|
// q8 to q9 |
|
813
|
|
|
$qval = ($nominal_bitrate + 256) / 64; |
|
814
|
|
|
} else { |
|
815
|
|
|
// q9 to q10 |
|
816
|
|
|
$qval = ($nominal_bitrate + 1300) / 180; |
|
817
|
|
|
} |
|
818
|
|
|
return round($qval, 1); // 5 or 4.9 |
|
819
|
|
|
} |
|
820
|
|
|
|
|
821
|
|
|
public static function FLACmetaBlockTypeLookup($block_type) |
|
822
|
|
|
{ |
|
823
|
|
|
static $lookup = [ |
|
824
|
|
|
0 => 'STREAMINFO', |
|
825
|
|
|
1 => 'PADDING', |
|
826
|
|
|
2 => 'APPLICATION', |
|
827
|
|
|
3 => 'SEEKTABLE', |
|
828
|
|
|
4 => 'VORBIS_COMMENT', |
|
829
|
|
|
5 => 'CUESHEET', |
|
830
|
|
|
6 => 'PICTURE' |
|
831
|
|
|
]; |
|
832
|
|
|
return (isset($lookup[$block_type]) ? $lookup[$block_type] : 'reserved'); |
|
833
|
|
|
} |
|
834
|
|
|
|
|
835
|
|
|
public static function FLACapplicationIDLookup($application_id) |
|
836
|
|
|
{ |
|
837
|
|
|
// http://flac.sourceforge.net/id.html |
|
838
|
|
|
|
|
839
|
|
|
static $lookup = [ |
|
840
|
|
|
0x46746F6C => 'flac-tools', // 'Ftol' |
|
841
|
|
|
0x46746F6C => 'Sound Font FLAC', // 'SFFL' |
|
842
|
|
|
0x7065656D => 'Parseable Embedded Extensible Metadata (specification)', // 'peem' |
|
843
|
|
|
0x786D6364 => 'xmcd' |
|
844
|
|
|
|
|
845
|
|
|
]; |
|
846
|
|
|
return (isset($lookup[$application_id]) ? $lookup[$application_id] : 'reserved'); |
|
847
|
|
|
} |
|
848
|
|
|
|
|
849
|
|
|
public static function FLACpictureTypeLookup($type_id) |
|
850
|
|
|
{ |
|
851
|
|
|
static $lookup = [ |
|
852
|
|
|
|
|
853
|
|
|
0 => 'Other', |
|
854
|
|
|
1 => "32x32 pixels 'file icon' (PNG only)", |
|
855
|
|
|
2 => 'Other file icon', |
|
856
|
|
|
3 => 'Cover (front)', |
|
857
|
|
|
4 => 'Cover (back)', |
|
858
|
|
|
5 => 'Leaflet page', |
|
859
|
|
|
6 => 'Media (e.g. label side of CD)', |
|
860
|
|
|
7 => 'Lead artist/lead performer/soloist', |
|
861
|
|
|
8 => 'Artist/performer', |
|
862
|
|
|
9 => 'Conductor', |
|
863
|
|
|
10 => 'Band/Orchestra', |
|
864
|
|
|
11 => 'Composer', |
|
865
|
|
|
12 => 'Lyricist/text writer', |
|
866
|
|
|
13 => 'Recording Location', |
|
867
|
|
|
14 => 'During recording', |
|
868
|
|
|
15 => 'During performance', |
|
869
|
|
|
16 => 'Movie/video screen capture', |
|
870
|
|
|
17 => 'A bright coloured fish', |
|
871
|
|
|
18 => 'Illustration', |
|
872
|
|
|
19 => 'Band/artist logotype', |
|
873
|
|
|
20 => 'Publisher/Studio logotype' |
|
874
|
|
|
]; |
|
875
|
|
|
return (isset($lookup[$type_id]) ? $lookup[$type_id] : 'reserved'); |
|
876
|
|
|
} |
|
877
|
|
|
|
|
878
|
|
|
} |
|
879
|
|
|
|
|
880
|
|
|
|
|
881
|
|
|
|
mambax7 /
xoopseditors
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