New Import

1 files changed, 309 insertions, 0 deletions

diff --git a/modules/id3/getid3/module.audio.flac.php b/modules/id3/getid3/module.audio.flac.php
new file mode 100644
index 00000000..18a55b0d
--- /dev/null
+++ b/modules/id3/getid3/module.audio.flac.php
@@ -0,0 +1,309 @@
+<?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
+{
+
+	function getid3_flac(&$fd, &$ThisFileInfo) {
+		// http://flac.sourceforge.net/format.html
+
+		fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
+		$StreamMarker = fread($fd, 4);
+		if ($StreamMarker != 'fLaC') {
+			$ThisFileInfo['error'][] = 'Expecting "fLaC" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$StreamMarker.'"';
+			return false;
+		}
+		$ThisFileInfo['fileformat']            = 'flac';
+		$ThisFileInfo['audio']['dataformat']   = 'flac';
+		$ThisFileInfo['audio']['bitrate_mode'] = 'vbr';
+		$ThisFileInfo['audio']['lossless']     = true;
+
+		return getid3_flac::FLACparseMETAdata($fd, $ThisFileInfo);
+	}
+
+
+	function FLACparseMETAdata(&$fd, &$ThisFileInfo) {
+
+		do {
+			$METAdataBlockOffset          = ftell($fd);
+			$METAdataBlockHeader          = fread($fd, 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) {
+				$ThisFileInfo['error'][] = 'corrupt or invalid METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset;
+				break;
+			}
+
+			$ThisFileInfo['flac'][$METAdataBlockTypeText]['raw'] = array();
+			$ThisFileInfo_flac_METAdataBlockTypeText_raw = &$ThisFileInfo['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;
+			$ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data']      = fread($fd, $METAdataBlockLength);
+			$ThisFileInfo['avdataoffset'] = ftell($fd);
+
+			switch ($METAdataBlockTypeText) {
+
+				case 'STREAMINFO':
+					if (!getid3_flac::FLACparseSTREAMINFO($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
+						return false;
+					}
+					break;
+
+				case 'PADDING':
+					// ignore
+					break;
+
+				case 'APPLICATION':
+					if (!getid3_flac::FLACparseAPPLICATION($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
+						return false;
+					}
+					break;
+
+				case 'SEEKTABLE':
+					if (!getid3_flac::FLACparseSEEKTABLE($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
+						return false;
+					}
+					break;
+
+				case 'VORBIS_COMMENT':
+					$OldOffset = ftell($fd);
+					fseek($fd, 0 - $METAdataBlockLength, SEEK_CUR);
+					getid3_ogg::ParseVorbisCommentsFilepointer($fd, $ThisFileInfo);
+					fseek($fd, $OldOffset, SEEK_SET);
+					break;
+
+				case 'CUESHEET':
+					if (!getid3_flac::FLACparseCUESHEET($ThisFileInfo_flac_METAdataBlockTypeText_raw['block_data'], $ThisFileInfo)) {
+						return false;
+					}
+					break;
+
+				default:
+					$ThisFileInfo['warning'][] = 'Unhandled METADATA_BLOCK_HEADER.BLOCK_TYPE ('.$METAdataBlockType.') at offset '.$METAdataBlockOffset;
+					break;
+			}
+
+		} while ($METAdataLastBlockFlag === false);
+
+
+		if (isset($ThisFileInfo['flac']['STREAMINFO'])) {
+			$ThisFileInfo['flac']['compressed_audio_bytes']   = $ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset'];
+			$ThisFileInfo['flac']['uncompressed_audio_bytes'] = $ThisFileInfo['flac']['STREAMINFO']['samples_stream'] * $ThisFileInfo['flac']['STREAMINFO']['channels'] * ($ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'] / 8);
+			if ($ThisFileInfo['flac']['uncompressed_audio_bytes'] == 0) {
+				$ThisFileInfo['error'][] = 'Corrupt FLAC file: uncompressed_audio_bytes == zero';
+				return false;
+			}
+			$ThisFileInfo['flac']['compression_ratio']        = $ThisFileInfo['flac']['compressed_audio_bytes'] / $ThisFileInfo['flac']['uncompressed_audio_bytes'];
+		}
+
+		// set md5_data_source - built into flac 0.5+
+		if (isset($ThisFileInfo['flac']['STREAMINFO']['audio_signature'])) {
+
+			if ($ThisFileInfo['flac']['STREAMINFO']['audio_signature'] === str_repeat("\x00", 16)) {
+
+				$ThisFileInfo['warning'][] = 'FLAC STREAMINFO.audio_signature is null (known issue with libOggFLAC)';
+
+			} else {
+
+				$ThisFileInfo['md5_data_source'] = '';
+				$md5 = $ThisFileInfo['flac']['STREAMINFO']['audio_signature'];
+				for ($i = 0; $i < strlen($md5); $i++) {
+					$ThisFileInfo['md5_data_source'] .= str_pad(dechex(ord($md5{$i})), 2, '00', STR_PAD_LEFT);
+				}
+				if (!preg_match('/^[0-9a-f]{32}$/', $ThisFileInfo['md5_data_source'])) {
+					unset($ThisFileInfo['md5_data_source']);
+				}
+
+			}
+
+		}
+
+		$ThisFileInfo['audio']['bits_per_sample'] = $ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'];
+		if ($ThisFileInfo['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
+			$ThisFileInfo['warning'][] = 'FLAC calculates MD5 data strangely on 8-bit audio, so the stored md5_data_source value will not match the decoded WAV file';
+		}
+		if (!empty($ThisFileInfo['ogg']['vendor'])) {
+			$ThisFileInfo['audio']['encoder'] = $ThisFileInfo['ogg']['vendor'];
+		}
+
+		return true;
+	}
+
+	function FLACmetaBlockTypeLookup($blocktype) {
+		static $FLACmetaBlockTypeLookup = array();
+		if (empty($FLACmetaBlockTypeLookup)) {
+			$FLACmetaBlockTypeLookup[0] = 'STREAMINFO';
+			$FLACmetaBlockTypeLookup[1] = 'PADDING';
+			$FLACmetaBlockTypeLookup[2] = 'APPLICATION';
+			$FLACmetaBlockTypeLookup[3] = 'SEEKTABLE';
+			$FLACmetaBlockTypeLookup[4] = 'VORBIS_COMMENT';
+			$FLACmetaBlockTypeLookup[5] = 'CUESHEET';
+		}
+		return (isset($FLACmetaBlockTypeLookup[$blocktype]) ? $FLACmetaBlockTypeLookup[$blocktype] : 'reserved');
+	}
+
+	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');
+	}
+
+	function FLACparseSTREAMINFO($METAdataBlockData, &$ThisFileInfo) {
+		$offset = 0;
+		$ThisFileInfo['flac']['STREAMINFO']['min_block_size']  = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2));
+		$offset += 2;
+		$ThisFileInfo['flac']['STREAMINFO']['max_block_size']  = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2));
+		$offset += 2;
+		$ThisFileInfo['flac']['STREAMINFO']['min_frame_size']  = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 3));
+		$offset += 3;
+		$ThisFileInfo['flac']['STREAMINFO']['max_frame_size']  = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 3));
+		$offset += 3;
+
+		$SampleRateChannelsSampleBitsStreamSamples             = getid3_lib::BigEndian2Bin(substr($METAdataBlockData, $offset, 8));
+		$ThisFileInfo['flac']['STREAMINFO']['sample_rate']     = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples,  0, 20));
+		$ThisFileInfo['flac']['STREAMINFO']['channels']        = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 20,  3)) + 1;
+		$ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'] = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 23,  5)) + 1;
+		$ThisFileInfo['flac']['STREAMINFO']['samples_stream']  = getid3_lib::Bin2Dec(substr($SampleRateChannelsSampleBitsStreamSamples, 28, 36));
+		$offset += 8;
+
+		$ThisFileInfo['flac']['STREAMINFO']['audio_signature'] =               substr($METAdataBlockData, $offset, 16);
+		$offset += 16;
+
+		if (!empty($ThisFileInfo['flac']['STREAMINFO']['sample_rate'])) {
+
+			$ThisFileInfo['audio']['bitrate_mode']     = 'vbr';
+			$ThisFileInfo['audio']['sample_rate']      = $ThisFileInfo['flac']['STREAMINFO']['sample_rate'];
+			$ThisFileInfo['audio']['channels']         = $ThisFileInfo['flac']['STREAMINFO']['channels'];
+			$ThisFileInfo['audio']['bits_per_sample']  = $ThisFileInfo['flac']['STREAMINFO']['bits_per_sample'];
+			$ThisFileInfo['playtime_seconds']          = $ThisFileInfo['flac']['STREAMINFO']['samples_stream'] / $ThisFileInfo['flac']['STREAMINFO']['sample_rate'];
+			$ThisFileInfo['audio']['bitrate']          = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
+
+		} else {
+
+			$ThisFileInfo['error'][] = 'Corrupt METAdata block: STREAMINFO';
+			return false;
+
+		}
+		return true;
+	}
+
+
+	function FLACparseAPPLICATION($METAdataBlockData, &$ThisFileInfo) {
+		$offset = 0;
+		$ApplicationID = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 4));
+		$offset += 4;
+		$ThisFileInfo['flac']['APPLICATION'][$ApplicationID]['name'] = getid3_flac::FLACapplicationIDLookup($ApplicationID);
+		$ThisFileInfo['flac']['APPLICATION'][$ApplicationID]['data'] = substr($METAdataBlockData, $offset);
+		$offset = $METAdataBlockLength;
+
+		return true;
+	}
+
+
+	function FLACparseSEEKTABLE($METAdataBlockData, &$ThisFileInfo) {
+		$offset = 0;
+		$METAdataBlockLength = strlen($METAdataBlockData);
+		$placeholderpattern = str_repeat("\xFF", 8);
+		while ($offset < $METAdataBlockLength) {
+			$SampleNumberString = substr($METAdataBlockData, $offset, 8);
+			$offset += 8;
+			if ($SampleNumberString == $placeholderpattern) {
+
+				// placeholder point
+				@$ThisFileInfo['flac']['SEEKTABLE']['placeholders']++;
+				$offset += 10;
+
+			} else {
+
+				$SampleNumber                                                = getid3_lib::BigEndian2Int($SampleNumberString);
+				$ThisFileInfo['flac']['SEEKTABLE'][$SampleNumber]['offset']  = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8));
+				$offset += 8;
+				$ThisFileInfo['flac']['SEEKTABLE'][$SampleNumber]['samples'] = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 2));
+				$offset += 2;
+
+			}
+		}
+		return true;
+	}
+
+	function FLACparseCUESHEET($METAdataBlockData, &$ThisFileInfo) {
+		$offset = 0;
+		$ThisFileInfo['flac']['CUESHEET']['media_catalog_number'] =          trim(substr($METAdataBlockData, $offset, 128), "\0");
+		$offset += 128;
+		$ThisFileInfo['flac']['CUESHEET']['lead_in_samples']      = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 8));
+		$offset += 8;
+		$ThisFileInfo['flac']['CUESHEET']['flags']['is_cd']       = (bool) (getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1)) & 0x80);
+		$offset += 1;
+
+		$offset += 258; // reserved
+
+		$ThisFileInfo['flac']['CUESHEET']['number_tracks']        = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
+		$offset += 1;
+
+		for ($track = 0; $track < $ThisFileInfo['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;
+
+			$ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['sample_offset']         = $TrackSampleOffset;
+
+			$ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['isrc']                  =               substr($METAdataBlockData, $offset, 12);
+			$offset += 12;
+
+			$TrackFlagsRaw                                                                     = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
+			$offset += 1;
+			$ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['is_audio']     = (bool) ($TrackFlagsRaw & 0x80);
+			$ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['flags']['pre_emphasis'] = (bool) ($TrackFlagsRaw & 0x40);
+
+			$offset += 13; // reserved
+
+			$ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['index_points']          = getid3_lib::BigEndian2Int(substr($METAdataBlockData, $offset, 1));
+			$offset += 1;
+
+			for ($index = 0; $index < $ThisFileInfo['flac']['CUESHEET']['tracks'][$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
+
+				$ThisFileInfo['flac']['CUESHEET']['tracks'][$TrackNumber]['indexes'][$IndexNumber] = $IndexSampleOffset;
+			}
+		}
+		return true;
+	}
+
+}
+
+?>
\ No newline at end of file