module.tag.id3v2.php

一个用PHP编写的

			$parsedFrame['volumechange']['left'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			if ($parsedFrame['incdec']['left'] === false) {
				$parsedFrame['volumechange']['left'] *= -1;
			}
			$frame_offset += $frame_bytesvolume;
			$parsedFrame['peakvolume']['right'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			$frame_offset += $frame_bytesvolume;
			$parsedFrame['peakvolume']['left']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
			$frame_offset += $frame_bytesvolume;
			if ($id3v2_majorversion == 3) {
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_offset);
				if (strlen($parsedFrame['data']) > 0) {
					$parsedFrame['incdec']['rightrear'] = (bool) substr($frame_incrdecrflags, 4, 1);
					$parsedFrame['incdec']['leftrear']  = (bool) substr($frame_incrdecrflags, 5, 1);
					$parsedFrame['volumechange']['rightrear'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['rightrear'] === false) {
						$parsedFrame['volumechange']['rightrear'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['volumechange']['leftrear'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['leftrear'] === false) {
						$parsedFrame['volumechange']['leftrear'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['rightrear'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['leftrear']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
				}
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_offset);
				if (strlen($parsedFrame['data']) > 0) {
					$parsedFrame['incdec']['center'] = (bool) substr($frame_incrdecrflags, 3, 1);
					$parsedFrame['volumechange']['center'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['center'] === false) {
						$parsedFrame['volumechange']['center'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['center'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
				}
				$parsedFrame['data'] = substr($parsedFrame['data'], $frame_offset);
				if (strlen($parsedFrame['data']) > 0) {
					$parsedFrame['incdec']['bass'] = (bool) substr($frame_incrdecrflags, 2, 1);
					$parsedFrame['volumechange']['bass'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					if ($parsedFrame['incdec']['bass'] === false) {
						$parsedFrame['volumechange']['bass'] *= -1;
					}
					$frame_offset += $frame_bytesvolume;
					$parsedFrame['peakvolume']['bass'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, $frame_bytesvolume));
					$frame_offset += $frame_bytesvolume;
				}
			}
			unset($parsedFrame['data']);


		} elseif (($id3v2_majorversion >= 4) && ($parsedFrame['frame_name'] == 'EQU2')) { // 4.12  EQU2 Equalisation (2) (ID3v2.4+ only)
			//   There may be more than one 'EQU2' frame in each tag,
			//   but only one with the same identification string
			// <Header of 'Equalisation (2)', ID: 'EQU2'>
			// Interpolation method  $xx
			//   $00  Band
			//   $01  Linear
			// Identification        <text string> $00
			//   The following is then repeated for every adjustment point
			// Frequency          $xx xx
			// Volume adjustment  $xx xx

			$frame_offset = 0;
			$frame_interpolationmethod = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_idstring = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
			if (ord($frame_idstring) === 0) {
				$frame_idstring = '';
			}
			$parsedFrame['description'] = $frame_idstring;
			$frame_remainingdata = substr($parsedFrame['data'], $frame_terminatorpos + strlen("\x00"));
			while (strlen($frame_remainingdata)) {
				$frame_frequency = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 0, 2)) / 2;
				$parsedFrame['data'][$frame_frequency] = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 2, 2), false, true);
				$frame_remainingdata = substr($frame_remainingdata, 4);
			}
			$parsedFrame['interpolationmethod'] = $frame_interpolationmethod;
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion == 3) && ($parsedFrame['frame_name'] == 'EQUA')) || // 4.12  EQUA Equalisation (ID3v2.3 only)
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'EQU'))) {     // 4.13  EQU  Equalisation (ID3v2.2 only)
			//   There may only be one 'EQUA' frame in each tag
			// <Header for 'Relative volume adjustment', ID: 'EQU'>
			// Adjustment bits    $xx
			//   This is followed by 2 bytes + ('adjustment bits' rounded up to the
			//   nearest byte) for every equalisation band in the following format,
			//   giving a frequency range of 0 - 32767Hz:
			// Increment/decrement   %x (MSB of the Frequency)
			// Frequency             (lower 15 bits)
			// Adjustment            $xx (xx ...)

			$frame_offset = 0;
			$parsedFrame['adjustmentbits'] = substr($parsedFrame['data'], $frame_offset++, 1);
			$frame_adjustmentbytes = ceil($parsedFrame['adjustmentbits'] / 8);

			$frame_remainingdata = (string) substr($parsedFrame['data'], $frame_offset);
			while (strlen($frame_remainingdata) > 0) {
				$frame_frequencystr = getid3_lib::BigEndian2Bin(substr($frame_remainingdata, 0, 2));
				$frame_incdec    = (bool) substr($frame_frequencystr, 0, 1);
				$frame_frequency = bindec(substr($frame_frequencystr, 1, 15));
				$parsedFrame[$frame_frequency]['incdec'] = $frame_incdec;
				$parsedFrame[$frame_frequency]['adjustment'] = getid3_lib::BigEndian2Int(substr($frame_remainingdata, 2, $frame_adjustmentbytes));
				if ($parsedFrame[$frame_frequency]['incdec'] === false) {
					$parsedFrame[$frame_frequency]['adjustment'] *= -1;
				}
				$frame_remainingdata = substr($frame_remainingdata, 2 + $frame_adjustmentbytes);
			}
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'RVRB')) || // 4.13  RVRB Reverb
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'REV'))) {     // 4.14  REV  Reverb
			//   There may only be one 'RVRB' frame in each tag.
			// <Header for 'Reverb', ID: 'RVRB'>
			// Reverb left (ms)                 $xx xx
			// Reverb right (ms)                $xx xx
			// Reverb bounces, left             $xx
			// Reverb bounces, right            $xx
			// Reverb feedback, left to left    $xx
			// Reverb feedback, left to right   $xx
			// Reverb feedback, right to right  $xx
			// Reverb feedback, right to left   $xx
			// Premix left to right             $xx
			// Premix right to left             $xx

			$frame_offset = 0;
			$parsedFrame['left']  = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['right'] = getid3_lib::BigEndian2Int(substr($parsedFrame['data'], $frame_offset, 2));
			$frame_offset += 2;
			$parsedFrame['bouncesL']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['bouncesR']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackLL']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackLR']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackRR']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['feedbackRL']    = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['premixLR']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			$parsedFrame['premixRL']      = ord(substr($parsedFrame['data'], $frame_offset++, 1));
			unset($parsedFrame['data']);


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'APIC')) || // 4.14  APIC Attached picture
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'PIC'))) {     // 4.15  PIC  Attached picture
			//   There may be several pictures attached to one file,
			//   each in their individual 'APIC' frame, but only one
			//   with the same content descriptor
			// <Header for 'Attached picture', ID: 'APIC'>
			// Text encoding      $xx
			// ID3v2.3+ => MIME type          <text string> $00
			// ID3v2.2  => Image format       $xx xx xx
			// Picture type       $xx
			// Description        <text string according to encoding> $00 (00)
			// Picture data       <binary data>

			$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';
			}

			if ($id3v2_majorversion == 2) {
				$frame_imagetype = substr($parsedFrame['data'], $frame_offset, 3);
				if (strtolower($frame_imagetype) == 'ima') {
					// complete hack for mp3Rage (www.chaoticsoftware.com) that puts ID3v2.3-formatted
					// MIME type instead of 3-char ID3v2.2-format image type  (thanks xbhoff豴acbell*net)
					$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
					$frame_mimetype = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
					if (ord($frame_mimetype) === 0) {
						$frame_mimetype = '';
					}
					$frame_imagetype = strtoupper(str_replace('image/', '', strtolower($frame_mimetype)));
					if ($frame_imagetype == 'JPEG') {
						$frame_imagetype = 'JPG';
					}
					$frame_offset = $frame_terminatorpos + strlen("\x00");
				} else {
					$frame_offset += 3;
				}
			}
			if ($id3v2_majorversion > 2) {
				$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
				$frame_mimetype = substr($parsedFrame['data'], $frame_offset, $frame_terminatorpos - $frame_offset);
				if (ord($frame_mimetype) === 0) {
					$frame_mimetype = '';
				}
				$frame_offset = $frame_terminatorpos + strlen("\x00");
			}

			$frame_picturetype = ord(substr($parsedFrame['data'], $frame_offset++, 1));

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

			if ($id3v2_majorversion == 2) {
				$parsedFrame['imagetype']    = $frame_imagetype;
			} else {
				$parsedFrame['mime']         = $frame_mimetype;
			}
			$parsedFrame['picturetypeid']    = $frame_picturetype;
			$parsedFrame['picturetype']      = $this->APICPictureTypeLookup($frame_picturetype);
			$parsedFrame['description']      = $frame_description;
			$parsedFrame['data']             = substr($parsedFrame['data'], $frame_terminatorpos + strlen($this->TextEncodingTerminatorLookup($frame_textencoding)));

			$imagechunkcheck = getid3_lib::GetDataImageSize($parsedFrame['data']);
			if (($imagechunkcheck[2] >= 1) && ($imagechunkcheck[2] <= 3)) {
				$parsedFrame['image_mime']       = 'image/'.getid3_lib::ImageTypesLookup($imagechunkcheck[2]);
				if ($imagechunkcheck[0]) {
					$parsedFrame['image_width']  = $imagechunkcheck[0];
				}
				if ($imagechunkcheck[1]) {
					$parsedFrame['image_height'] = $imagechunkcheck[1];
				}
				$parsedFrame['image_bytes']      = strlen($parsedFrame['data']);
			}


		} elseif ((($id3v2_majorversion >= 3) && ($parsedFrame['frame_name'] == 'GEOB')) || // 4.15  GEOB General encapsulated object
				(($id3v2_majorversion == 2) && ($parsedFrame['frame_name'] == 'GEO'))) {     // 4.16  GEO  General encapsulated object
			//   There may be more than one 'GEOB' frame in each tag,
			//   but only one with the same content descriptor
			// <Header for 'General encapsulated object', ID: 'GEOB'>
			// Text encoding          $xx
			// MIME type              <text string> $00
			// Filename               <text string according to encoding> $00 (00)
			// Content description    <text string according to encoding> $00 (00)
			// Encapsulated object    <binary data>

			$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';
			}
			$frame_terminatorpos = strpos($parsedFrame['data'], "\x00", $frame_offset);
			$frame_mimety