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File: includes/getid3/module.audio.flac.php

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File: includes/getid3/module.audio.flac.php
Role: Auxiliary script
Content type: text/plain
Description: getID3 dependency
Class: WaldScan
Scan directories for files with certain extensions
Author: By
Last change: Update of includes/getid3/module.audio.flac.php
Date: 1 year ago
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<?php ///////////////////////////////////////////////////////////////// /// getID3() by James Heinrich <info@getid3.org> // // available at http://getid3.sourceforge.net // // or http://www.getid3.org // ///////////////////////////////////////////////////////////////// // See readme.txt for more details // ///////////////////////////////////////////////////////////////// // // // module.audio.flac.php // // module for analyzing FLAC and OggFLAC audio files // // dependencies: module.audio.ogg.php // // /// ///////////////////////////////////////////////////////////////// getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.audio.ogg.php', __FILE__, true); class getid3_flac extends getid3_handler { var $inline_attachments = true; // true: return full data for all attachments; false: return no data for all attachments; integer: return data for attachments <= than this; string: save as file to this directory function Analyze() { $info = &$this->getid3->info; // http://flac.sourceforge.net/format.html $this->fseek($info['avdataoffset'], SEEK_SET); $StreamMarker = $this->fread(4); $magic = 'fLaC'; if ($StreamMarker != $magic) { $info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes($magic).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($StreamMarker).'"'; return false; } $info['fileformat'] = 'flac'; $info['audio']['dataformat'] = 'flac'; $info['audio']['bitrate_mode'] = 'vbr'; $info['audio']['lossless'] = true; return $this->FLACparseMETAdata(); } function FLACparseMETAdata() { $info = &$this->getid3->info; do { $METAdataBlockOffset = $this->ftell(); $METAdataBlockHeader = $this->fread(4); $METAdataLastBlockFlag = (bool) (getid3_lib::BigEndian2Int(substr($METAdataBlockHeader, 0, 1)) & 0x80); $METAdataBlockType = getid3_lib::BigEndian2Int(substr($METAdataBlockHeader, 0, 1)) & 0x7F; $METAdataBlockLength = getid3_lib::BigEndian2Int(substr($METAdataBlockHeader, 1, 3)); $METAdataBlockTypeText = getid3_flac::FLACmetaBlockTypeLookup($METAdataBlockType); if ($METAdataBlockLength < 0) { $info['error'][] = 'corrupt or invalid METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset; break; } $info['flac'][$METAdataBlockTypeText]['raw'] = array(); $ThisFileInfo_flac_METAdataBlockTypeText_raw = &$info['flac'][$METAdataBlockTypeText]['raw']; $ThisFileInfo_flac_METAdataBlockTypeText_raw['offset'] = $METAdataBlockOffset; $ThisFileInfo_flac_METAdataBlockTypeText_raw['last_meta_block'] = $METAdataLastBlockFlag; $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_type'] = $METAdataBlockType; $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_type_text'] = $METAdataBlockTypeText; $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_length'] = $METAdataBlockLength; if (($METAdataBlockOffset + 4 + $METAdataBlockLength) > $info['avdataend']) { $info['error'][] = 'METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset.' extends beyond end of file'; break; } if ($METAdataBlockLength < 1) { $info['error'][] = 'METADATA_BLOCK_HEADER.BLOCK_LENGTH ('.$METAdataBlockLength.') at offset '.$METAdataBlockOffset.' is invalid'; break; } $ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'] = $this->fread($METAdataBlockLength); $info['avdataoffset'] = $this->ftell(); switch ($METAdataBlockTypeText) { case 'STREAMINFO': // 0x00 if (!$this->FLACparseSTREAMINFO($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'])) { return false; } break; case 'PADDING': // 0x01 // ignore break; case 'APPLICATION': // 0x02 if (!$this->FLACparseAPPLICATION($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'])) { return false; } break; case 'SEEKTABLE': // 0x03 if (!$this->FLACparseSEEKTABLE($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'])) { return false; } break; case 'VORBIS_COMMENT': // 0x04 $getid3_temp = new getID3(); $getid3_temp->openfile($this->getid3->filename); $getid3_temp->info['avdataoffset'] = $this->ftell() - $METAdataBlockLength; $getid3_temp->info['audio']['dataformat'] = 'flac'; $getid3_temp->info['flac'] = $info['flac']; $getid3_ogg = new getid3_ogg($getid3_temp); $getid3_ogg->ParseVorbisCommentsFilepointer(); $maybe_copy_keys = array('vendor', 'comments_raw', 'comments', 'replay_gain'); foreach ($maybe_copy_keys as $maybe_copy_key) { if (!empty($getid3_temp->info['ogg'][$maybe_copy_key])) { $info['ogg'][$maybe_copy_key] = $getid3_temp->info['ogg'][$maybe_copy_key]; } } if (!empty($getid3_temp->info['replay_gain'])) { $info['replay_gain'] = $getid3_temp->info['replay_gain']; } unset($getid3_temp, $getid3_ogg); break; case 'CUESHEET': // 0x05 if (!getid3_flac::FLACparseCUESHEET($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'])) { return false; } break; case 'PICTURE': // 0x06 if (!getid3_flac::FLACparsePICTURE($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'])) { return false; } break; default: $info['warning'][] = 'Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset; break; } } while ($METAdataLastBlockFlag === false); if (isset($info['flac']['PICTURE'])) { foreach ($info['flac']['PICTURE'] as $key => $valuearray) { if (!empty($valuearray['image_mime']) && !empty($valuearray['data'])) { $info['ogg']['comments']['picture'][] = array('image_mime'=>$valuearray['image_mime'], 'data'=>$valuearray['data']); } } } if (isset($info['flac']['STREAMINFO'])) { $info['flac']['compressed_audio_bytes'] = $info['avdataend'] - $info['avdataoffset']; $info['flac']['uncompressed_audio_bytes'] = $info['flac']['STREAMINFO']['samples_stream'] * $info['flac']['STREAMINFO']['channels'] * ($info['flac']['STREAMINFO']['bits_per_sample'] / 8); if ($info['flac']['uncompressed_audio_bytes'] == 0) { $info['error'][] = 'Corrupt FLAC file: uncompressed_audio_bytes == zero'; return false; } $info['flac']['compression_ratio'] = $info['flac']['compressed_audio_bytes'] / $info['flac']['uncompressed_audio_bytes']; } // set md5_data_source - built into flac 0.5+ if (isset($info['flac']['STREAMINFO']['audio_signature'])) { if ($info['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) { $info['warning'][] = 'FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)'; } else { $info['md5_data_source'] = ''; $md5 = $info['flac']['STREAMINFO']['audio_signature']; for ($i = 0; $i < strlen($md5); $i++) { $info['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT); } if (!preg_match('/^[0-9a-f]{32}$/', $info['md5_data_source'])) { unset($info['md5_data_source']); } } } $info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample']; if ($info['audio']['bits_per_sample'] == 8) { // special case // must invert sign bit on all data bytes before MD5'ing to match FLAC's calculated value // MD5sum calculates on unsigned bytes, but FLAC calculated MD5 on 8-bit audio data as signed $info['warning'][] = 'FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file'; } if (!empty($info['ogg']['vendor'])) { $info['audio']['encoder'] = $info['ogg']['vendor']; } return true; } static function FLACmetaBlockTypeLookup($blocktype) { static $FLACmetaBlockTypeLookup = array(); if (empty($FLACmetaBlockTypeLookup)) { $FLACmetaBlockTypeLookup[0] = 'STREAMINFO'; $FLACmetaBlockTypeLookup[1] = 'PADDING'; $FLACmetaBlockTypeLookup[2] = 'APPLICATION'; $FLACmetaBlockTypeLookup[3] = 'SEEKTABLE'; $FLACmetaBlockTypeLookup[4] = 'VORBIS_COMMENT'; $FLACmetaBlockTypeLookup[5] = 'CUESHEET'; $FLACmetaBlockTypeLookup[6] = 'PICTURE'; } return (isset($FLACmetaBlockTypeLookup[$blocktype]) ? $FLACmetaBlockTypeLookup[$blocktype] : 'reserved'); } static function FLACapplicationIDLookup($applicationid) { static $FLACapplicationIDLookup = array(); if (empty($FLACapplicationIDLookup)) { // http://flac.sourceforge.net/id.html $FLACapplicationIDLookup[0x46746F6C] = 'flac-tools'; // 'Ftol' $FLACapplicationIDLookup[0x46746F6C] = 'Sound Font FLAC'; // 'SFFL' } return (isset($FLACapplicationIDLookup[$applicationid]) ? $FLACapplicationIDLookup[$applicationid] : 'reserved'); } static function FLACpictureTypeLookup($type_id) { static $lookup = array ( 0 => 'Other', 1 => '32x32 pixels \'file icon\' (PNG only)', 2 => 'Other file icon', 3 => 'Cover (front)', 4 => 'Cover (back)', 5 => 'Leaflet page', 6 => 'Media (e.g. label side of CD)', 7 => 'Lead artist/lead performer/soloist', 8 => 'Artist/performer', 9 => 'Conductor', 10 => 'Band/Orchestra', 11 => 'Composer', 12 => 'Lyricist/text writer', 13 => 'Recording Location', 14 => 'During recording', 15 => 'During performance', 16 => 'Movie/video screen capture', 17 => 'A bright coloured fish', 18 => 'Illustration', 19 => 'Band/artist logotype', 20 => 'Publisher/Studio logotype', ); return (isset($lookup[$type_id]) ? $lookup[$type_id] : 'reserved'); } function FLACparseSTREAMINFO($METAdataBlockData) { $info = &$this->getid3->info; $offset = 0; $info['flac']['STREAMINFO']['min_block_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2)); $offset += 2; $info['flac']['STREAMINFO']['max_block_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2)); $offset += 2; $info['flac']['STREAMINFO']['min_frame_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 3)); $offset += 3; $info['flac']['STREAMINFO']['max_frame_size'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 3)); $offset += 3; $SampleRateChannelsSampleBitsStreamSamples = getid3_lib::BigEndian2Bin(substr($METAdataBlockData, $offset, 8)); $info['flac']['STREAMINFO']['sample_rate'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 0, 20)); $info['flac']['STREAMINFO']['channels'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 20, 3)) + 1; $info['flac']['STREAMINFO']['bits_per_sample'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 23, 5)) + 1; $info['flac']['STREAMINFO']['samples_stream'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 28, 36)); $offset += 8; $info['flac']['STREAMINFO']['audio_signature'] = substr($METAdataBlockData, $offset, 16); $offset += 16; if (!empty($info['flac']['STREAMINFO']['sample_rate'])) { $info['audio']['bitrate_mode'] = 'vbr'; $info['audio']['sample_rate'] = $info['flac']['STREAMINFO']['sample_rate']; $info['audio']['channels'] = $info['flac']['STREAMINFO']['channels']; $info['audio']['bits_per_sample'] = $info['flac']['STREAMINFO']['bits_per_sample']; $info['playtime_seconds'] = $info['flac']['STREAMINFO']['samples_stream'] / $info['flac']['STREAMINFO']['sample_rate']; if ($info['playtime_seconds'] > 0) { $info['audio']['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds']; } } else { $info['error'][] = 'Corrupt METAdata block: STREAMINFO'; return false; } unset($info['flac']['STREAMINFO']['raw']); return true; } function FLACparseAPPLICATION($METAdataBlockData) { $info = &$this->getid3->info; $offset = 0; $ApplicationID = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 4)); $offset += 4; $info['flac']['APPLICATION'][$ApplicationID]['name'] = getid3_flac::FLACapplicationIDLookup($ApplicationID); $info['flac']['APPLICATION'][$ApplicationID]['data'] = substr($METAdataBlockData, $offset); $offset = $METAdataBlockLength; unset($info['flac']['APPLICATION']['raw']); return true; } function FLACparseSEEKTABLE($METAdataBlockData) { $info = &$this->getid3->info; $offset = 0; $METAdataBlockLength = strlen($METAdataBlockData); $placeholderpattern = str_repeat("\xFF", 8); while ($offset < $METAdataBlockLength) { $SampleNumberString = substr($METAdataBlockData, $offset, 8); $offset += 8; if ($SampleNumberString == $placeholderpattern) { // placeholder point getid3_lib::safe_inc($info['flac']['SEEKTABLE']['placeholders'], 1); $offset += 10; } else { $SampleNumber = getid3_lib::BigEndian2Int($SampleNumberString); $info['flac']['SEEKTABLE'][$SampleNumber]['offset'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8)); $offset += 8; $info['flac']['SEEKTABLE'][$SampleNumber]['samples'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2)); $offset += 2; } } unset($info['flac']['SEEKTABLE']['raw']); return true; } function FLACparseCUESHEET($METAdataBlockData) { $info = &$this->getid3->info; $offset = 0; $info['flac']['CUESHEET']['media_catalog_number'] = trim(substr($METAdataBlockData, $offset, 128), "\0"); $offset += 128; $info['flac']['CUESHEET']['lead_in_samples'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8)); $offset += 8; $info['flac']['CUESHEET']['flags']['is_cd'] = (bool) (getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)) & 0x80); $offset += 1; $offset += 258; // reserved $info['flac']['CUESHEET']['number_tracks'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)); $offset += 1; for ($track = 0; $track < $info['flac']['CUESHEET']['number_tracks']; $track++) { $TrackSampleOffset = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8)); $offset += 8; $TrackNumber = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)); $offset += 1; $info['flac']['CUESHEET']['tracks'][$TrackNumber]['sample_offset'] = $TrackSampleOffset; $info['flac']['CUESHEET']['tracks'][$TrackNumber]['isrc'] = substr($METAdataBlockData, $offset, 12); $offset += 12; $TrackFlagsRaw = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)); $offset += 1; $info['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['is_audio'] = (bool) ($TrackFlagsRaw & 0x80); $info['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['pre_emphasis'] = (bool) ($TrackFlagsRaw & 0x40); $offset += 13; // reserved $info['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)); $offset += 1; for ($index = 0; $index < $info['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points']; $index++) { $IndexSampleOffset = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8)); $offset += 8; $IndexNumber = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)); $offset += 1; $offset += 3; // reserved $info['flac']['CUESHEET']['tracks'][$TrackNumber]['indexes'][$IndexNumber] = $IndexSampleOffset; } } unset($info['flac']['CUESHEET']['raw']); return true; } function FLACparsePICTURE($meta_data_block_data) { $info = &$this->getid3->info; $picture = &$info['flac']['PICTURE'][sizeof($info['flac']['PICTURE']) - 1]; $picture['offset'] = $info['flac']['PICTURE']['raw']['offset']; unset($info['flac']['PICTURE']['raw']); $offset = 0; $picture['typeid'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $picture['type'] = getid3_flac::FLACpictureTypeLookup($picture['typeid']); $offset += 4; $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $picture['image_mime'] = substr($meta_data_block_data, $offset, $length); $offset += $length; $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $picture['description'] = substr($meta_data_block_data, $offset, $length); $offset += $length; $picture['width'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $picture['height'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $picture['color_depth'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $picture['colors_indexed'] = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $length = getid3_lib::BigEndian2Int(substr($meta_data_block_data, $offset, 4)); $offset += 4; $picture['data'] = substr($meta_data_block_data, $offset, $length); $offset += $length; $picture['data_length'] = strlen($picture['data']); do { if ($this->inline_attachments === false) { // skip entirely unset($picture['data']); break; } if ($this->inline_attachments === true) { // great } elseif (is_int($this->inline_attachments)) { if ($this->inline_attachments < $picture['data_length']) { // too big, skip $info['warning'][] = 'attachment at '.$picture['offset'].' is too large to process inline ('.number_format($picture['data_length']).' bytes)'; unset($picture['data']); break; } } elseif (is_string($this->inline_attachments)) { $this->inline_attachments = rtrim(str_replace(array('/', '\\'), DIRECTORY_SEPARATOR, $this->inline_attachments), DIRECTORY_SEPARATOR); if (!is_dir($this->inline_attachments) || !is_writable($this->inline_attachments)) { // cannot write, skip $info['warning'][] = 'attachment at '.$picture['offset'].' cannot be saved to "'.$this->inline_attachments.'" (not writable)'; unset($picture['data']); break; } } // if we get this far, must be OK if (is_string($this->inline_attachments)) { $destination_filename = $this->inline_attachments.DIRECTORY_SEPARATOR.md5($info['filenamepath']).'_'.$picture['offset']; if (!file_exists($destination_filename) || is_writable($destination_filename)) { file_put_contents($destination_filename, $picture['data']); } else { $info['warning'][] = 'attachment at '.$picture['offset'].' cannot be saved to "'.$destination_filename.'" (not writable)'; } $picture['data_filename'] = $destination_filename; unset($picture['data']); } else { if (!isset($info['flac']['comments']['picture'])) { $info['flac']['comments']['picture'] = array(); } $info['flac']['comments']['picture'][] = array('data'=>$picture['data'], 'image_mime'=>$picture['image_mime']); } } while (false); return true; } } ?>