module.tag.id3v2.php

一个用PHP编写的

			}
			$reference_counter = 0;
			while (strlen($deviationbitstream) > 0) {
				$parsedFrame[$reference_counter]['bytedeviation'] = bindec(substr($deviationbitstream, 0, $parsedFrame['bitsforbytesdeviation']));
				$parsedFrame[$reference_counter]['msdeviation']   = bindec(substr($deviationbitstream, $parsedFrame['bitsforbytesdeviation'], $parsedFrame['bitsformsdeviation']));
				$deviationbitstream = substr($deviationbitstream, $parsedFrame['bitsforbytesdeviation'] + $parsedFrame['bitsformsdeviation']);
				$reference_counter++;
			}
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'SYTC')) || // 4.7   SYTC Synchronised tempo codes
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'STC'))) {     // 4.8   STC  Synchronised tempo codes
			//   There may only be one 'SYTC' frame in each tag
			// <Header for 'Synchronised tempo codes', ID: 'SYTC'>
			// Time stamp format   $xx
			// Tempo data          <binary data>
			//   Where time stamp format is:
			// $01  (32-bit value) MPEG frames from beginning of file
			// $02  (32-bit value) milliseconds from beginning of file

			$frame_offset = 0;
			$parsedFrame['timestampformat'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$timestamp_counter = 0;
			while ($frame_offset < strlen($parsedFrame['data'])) {
				$parsedFrame[$timestamp_counter]['tempo'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
				if ($parsedFrame[$timestamp_counter]['tempo'] == 255) {
					$parsedFrame[$timestamp_counter]['tempo'] += ord(substr($parsedFrame['data'], $frame_offset++, 1));
				}
				$parsedFrame[$timestamp_counter]['timestamp'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 4));
				$frame_offset += 4;
				$timestamp_counter++;
			}
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'USLT')) || // 4.8   USLT Unsynchronised lyric/text transcription
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'ULT'))) {     // 4.9   ULT  Unsynchronised lyric/text transcription
			//   There may be more than one 'Unsynchronised lyrics/text transcription' frame
			//   in each tag, but only one with the same language and content descriptor.
			// <Header for 'Unsynchronised lyrics/text transcription', ID: 'USLT'>
			// Text encoding        $xx
			// Language             $xx xx xx
			// Content descriptor   <text string according to encoding> $00 (00)
			// Lyrics/text          <full text string according to encoding>

			$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$ThisFileInfo['warning'][] = 'Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding';
			}
			$frame_language = substr($parsedFrame['data'], $frame_offset, 3);
			$frame_offset += 3;
			$frame_terminatorpos = strpos($parsedFrame['data'], $this->TextEncodingTerminatorLookup($frame_textencoding), $frame_offset);
			if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)), 1)) === 0) {
				$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
			}
			$frame_description = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_description) === 0) {
				$frame_description = '';
			}
			$parsedFrame['data'] = substr($parsedFrame['data'], $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)));

			$parsedFrame['encodingid']   = $frame_textencoding;
			$parsedFrame['encoding']     = $this->TextEncodingNameLookup($frame_textencoding);

			$parsedFrame['data']         = $parsedFrame['data'];
			$parsedFrame['language']     = $frame_language;
			$parsedFrame['languagename'] = $this->LanguageLookup($frame_language, false);
			$parsedFrame['description']  = $frame_description;
			if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
				$ThisFileInfo['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $ThisFileInfo['id3v2']['encoding'], $parsedFrame['data']);
			}
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'SYLT')) || // 4.9   SYLT Synchronised lyric/text
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'SLT'))) {     // 4.10  SLT  Synchronised lyric/text
			//   There may be more than one 'SYLT' frame in each tag,
			//   but only one with the same language and content descriptor.
			// <Header for 'Synchronised lyrics/text', ID: 'SYLT'>
			// Text encoding        $xx
			// Language             $xx xx xx
			// Time stamp format    $xx
			//   $01  (32-bit value) MPEG frames from beginning of file
			//   $02  (32-bit value) milliseconds from beginning of file
			// Content type         $xx
			// Content descriptor   <text string according to encoding> $00 (00)
			//   Terminated text to be synced (typically a syllable)
			//   Sync identifier (terminator to above string)   $00 (00)
			//   Time stamp                                     $xx (xx ...)

			$frame_offset = 0;
			$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
				$ThisFileInfo['warning'][] = 'Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding';
			}
			$frame_language = substr($parsedFrame['data'], $frame_offset, 3);
			$frame_offset += 3;
			$parsedFrame['timestampformat'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['contenttypeid']   = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['contenttype']     = $this->SYTLContentTypeLookup($parsedFrame['contenttypeid']);
			$parsedFrame['encodingid']      = $frame_textencoding;
			$parsedFrame['encoding']        = $this->TextEncodingNameLookup($frame_textencoding);

			$parsedFrame['language']        = $frame_language;
			$parsedFrame['languagename']    = $this->LanguageLookup($frame_language, false);

			$timestampindex = 0;
			$frame_remainingdata = substr($parsedFrame['data'], $frame_offset);
			while (strlen($frame_remainingdata)) {
				$frame_offset = 0;
				$frame_terminatorpos = strpos($frame_remainingdata, $this->TextEncodingTerminatorLookup($frame_textencoding));
				if ($frame_terminatorpos === false) {
					$frame_remainingdata = '';
				} else {
					if (ord(substr($frame_remainingdata, $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)), 1)) === 0) {
						$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
					}
					$parsedFrame['lyrics'][$timestampindex]['data'] = substr($frame_remainingdata, $frame_offset, $frame_terminatorpos - $frame_offset);

					$frame_remainingdata = substr($frame_remainingdata, $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)));
					if (($timestampindex == 0) && (ord($frame_remainingdata{0}) != 0)) {
						// timestamp probably omitted for first data item
					} else {
						$parsedFrame['lyrics'][$timestampindex]['timestamp'] = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 0, 4));
						$frame_remainingdata = substr($frame_remainingdata, 4);
					}
					$timestampindex++;
				}
			}
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'COMM')) || // 4.10  COMM Comments
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'COM'))) {     // 4.11  COM  Comments
			//   There may be more than one comment frame in each tag,
			//   but only one with the same language and content descriptor.
			// <Header for 'Comment', ID: 'COMM'>
			// Text encoding          $xx
			// Language               $xx xx xx
			// Short content descrip. <text string according to encoding> $00 (00)
			// The actual text        <full text string according to encoding>

			if (strlen($parsedFrame['data']) < 5) {

				$ThisFileInfo['warning'][] = 'Invalid data (too short) for "'.$parsedFrame['frame_name'].'" frame at offset '.$parsedFrame['dataoffset'];

			} else {

				$frame_offset = 0;
				$frame_textencoding = ord(substr($parsedFrame['data'], $frame_offset++, 1));
				if ((($id3v2_majorversion <= 3) && ($frame_textencoding > 1)) || (($id3v2_majorversion == 4) && ($frame_textencoding > 3))) {
					$ThisFileInfo['warning'][] = 'Invalid text encoding byte ('.$frame_textencoding.') in frame "'.$parsedFrame['frame_name'].'" - defaulting to ISO-8859-1 encoding';
				}
				$frame_language = substr($parsedFrame['data'], $frame_offset, 3);
				$frame_offset += 3;
				$frame_terminatorpos = strpos($parsedFrame['data'], $this->TextEncodingTerminatorLookup($frame_textencoding), $frame_offset);
				if (ord(substr($parsedFrame['data'], $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)), 1)) === 0) {
					$frame_terminatorpos++; // strpos() fooled because 2nd byte of Unicode chars are often 0x00
				}
				$frame_description = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
				if (ord($frame_description) === 0) {
					$frame_description = '';
				}
				$frame_text = (string) substr($parsedFrame['data'], $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)));

				$parsedFrame['encodingid']   = $frame_textencoding;
				$parsedFrame['encoding']     = $this->TextEncodingNameLookup($frame_textencoding);

				$parsedFrame['language']     = $frame_language;
				$parsedFrame['languagename'] = $this->LanguageLookup($frame_language, false);
				$parsedFrame['description']  = $frame_description;
				$parsedFrame['data']         = $frame_text;
				if (!empty($parsedFrame['framenameshort']) && !empty($parsedFrame['data'])) {
					$ThisFileInfo['id3v2']['comments'][$parsedFrame['framenameshort']][] = getid3_lib::iconv_fallback($parsedFrame['encoding'], $ThisFileInfo['id3v2']['encoding'], $parsedFrame['data']);
				}

			}

		} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'RVA2')) { // 4.11  RVA2 Relative volume adjustment (2) (ID3v2.4+ only)
			//   There may be more than one 'RVA2' frame in each tag,
			//   but only one with the same identification string
			// <Header for 'Relative volume adjustment (2)', ID: 'RVA2'>
			// Identification          <text string> $00
			//   The 'identification' string is used to identify the situation and/or
			//   device where this adjustment should apply. The following is then
			//   repeated for every channel:
			// Type of channel         $xx
			// Volume adjustment       $xx xx
			// Bits representing peak  $xx
			// Peak volume             $xx (xx ...)

			$frame_terminatorpos = strpos($parsedFrame['data'], "\x00");
			$frame_idstring = substr($parsedFrame['data'], 0, $frame_terminatorpos);
			if (ord($frame_idstring) === 0) {
				$frame_idstring = '';
			}
			$frame_remainingdata = substr($parsedFrame['data'], $frame_terminatorpos + strlen("\x00"));
			$parsedFrame['description'] = $frame_idstring;
			while (strlen($frame_remainingdata)) {
				$frame_offset = 0;
				$frame_channeltypeid = ord(substr($frame_remainingdata, $frame_offset++, 1));
				$parsedFrame[$frame_channeltypeid]['channeltypeid']  = $frame_channeltypeid;
				$parsedFrame[$frame_channeltypeid]['channeltype']    = $this->RVA2ChannelTypeLookup($frame_channeltypeid);
				$parsedFrame[$frame_channeltypeid]['volumeadjust']   = getid3_lib::BigEndian2Int(substr($frame_remainingdata, $frame_offset, 2), false, true); // 16-bit signed
				$frame_offset += 2;
				$parsedFrame[$frame_channeltypeid]['bitspeakvolume'] = ord(substr($frame_remainingdata, $frame_offset++, 1));
				$frame_bytespeakvolume = ceil($parsedFrame[$frame_channeltypeid]['bitspeakvolume'] / 8);
				$parsedFrame[$frame_channeltypeid]['peakvolume']     = getid3_lib::BigEndian2Int(substr($frame_remainingdata, $frame_offset, $frame_bytespeakvolume));
				$frame_remainingdata = substr($frame_remainingdata, $frame_offset + $frame_bytespeakvolume);
			}
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion == 3) && ($parsedFrame['frame_name'] == 'RVAD')) || // 4.12  RVAD Relative volume adjustment (ID3v2.3 only)
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'RVA'))) {     // 4.12  RVA  Relative volume adjustment (ID3v2.2 only)
			//   There may only be one 'RVA' frame in each tag
			// <Header for 'Relative volume adjustment', ID: 'RVA'>
			// ID3v2.2 => Increment/decrement     %000000ba
			// ID3v2.3 => Increment/decrement     %00fedcba
			// Bits used for volume descr.        $xx
			// Relative volume change, right      $xx xx (xx ...) // a
			// Relative volume change, left       $xx xx (xx ...) // b
			// Peak volume right                  $xx xx (xx ...)
			// Peak volume left                   $xx xx (xx ...)
			//   ID3v2.3 only, optional (not present in ID3v2.2):
			// Relative volume change, right back $xx xx (xx ...) // c
			// Relative volume change, left back  $xx xx (xx ...) // d
			// Peak volume right back             $xx xx (xx ...)
			// Peak volume left back              $xx xx (xx ...)
			//   ID3v2.3 only, optional (not present in ID3v2.2):
			// Relative volume change, center     $xx xx (xx ...) // e
			// Peak volume center                 $xx xx (xx ...)
			//   ID3v2.3 only, optional (not present in ID3v2.2):
			// Relative volume change, bass       $xx xx (xx ...) // f
			// Peak volume bass                   $xx xx (xx ...)

			$frame_offset = 0;
			$frame_incrdecrflags = getid3_lib::BigEndian2Bin(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['incdec']['right'] = (bool) substr($frame_incrdecrflags, 6, 1);
			$parsedFrame['incdec']['left']  = (bool) substr($frame_incrdecrflags, 7, 1);
			$parsedFrame['bitsvolume'] = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_bytesvolume = ceil($parsedFrame['bitsvolume'] / 8);
			$parsedFrame['volumechange']['right'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			if ($parsedFrame['incdec']['right'] === false) {
				$parsedFrame['volumechange']['right'] *= -1;
			}
			$frame_offset += $frame_bytesvolume;