#------------------------------------------------------------------------------ # File: ASF.pm # # Description: Read ASF/WMA/WMV meta information # # Revisions: 12/23/2005 - P. Harvey Created # # References: 1) http://www.microsoft.com/windows/windowsmedia/format/asfspec.aspx # 2) http://www.adobe.com/devnet/xmp/pdfs/XMPSpecificationPart3.pdf (Oct 2008) #------------------------------------------------------------------------------ package Image::ExifTool::ASF; use strict; use vars qw($VERSION); use Image::ExifTool qw(:DataAccess :Utils); use Image::ExifTool::Exif; use Image::ExifTool::RIFF; $VERSION = '1.25'; sub ProcessASF($$;$); sub ProcessContentDescription($$$); sub ProcessExtendedContentDescription($$$); sub ProcessMetadata($$$); sub ProcessPicture($$$); sub ProcessCodecList($$$); # GUID definitions my %errorCorrection = ( '20FB5700-5B55-11CF-A8FD-00805F5C442B' => 'No Error Correction', 'BFC3CD50-618F-11CF-8BB2-00AA00B4E220' => 'Audio Spread', ); my %streamType = ( 'F8699E40-5B4D-11CF-A8FD-00805F5C442B' => 'Audio', 'BC19EFC0-5B4D-11CF-A8FD-00805F5C442B' => 'Video', '59DACFC0-59E6-11D0-A3AC-00A0C90348F6' => 'Command', 'B61BE100-5B4E-11CF-A8FD-00805F5C442B' => 'JFIF', '35907DE0-E415-11CF-A917-00805F5C442B' => 'Degradable JPEG', '91BD222C-F21C-497A-8B6D-5AA86BFC0185' => 'File Transfer', '3AFB65E2-47EF-40F2-AC2C-70A90D71D343' => 'Binary', ); my %mutex = ( 'D6E22A00-35DA-11D1-9034-00A0C90349BE' => 'MutexLanguage', 'D6E22A01-35DA-11D1-9034-00A0C90349BE' => 'MutexBitrate', 'D6E22A02-35DA-11D1-9034-00A0C90349BE' => 'MutexUnknown', ); my %bandwidthSharing = ( 'AF6060AA-5197-11D2-B6AF-00C04FD908E9' => 'SharingExclusive', 'AF6060AB-5197-11D2-B6AF-00C04FD908E9' => 'SharingPartial', ); my %typeSpecific = ( '776257D4-C627-41CB-8F81-7AC7FF1C40CC' => 'WebStreamMediaSubtype', 'DA1E6B13-8359-4050-B398-388E965BF00C' => 'WebStreamFormat', ); my %advancedContentEncryption = ( '7A079BB6-DAA4-4e12-A5CA-91D38DC11A8D' => 'DRMNetworkDevices', ); # ASF top level objects %Image::ExifTool::ASF::Main = ( PROCESS_PROC => \&ProcessASF, NOTES => q{ The ASF format is used by Windows WMA and WMV files, and DIVX videos. Tag ID's aren't listed because they are huge 128-bit GUID's that would ruin the formatting of this table. }, '75B22630-668E-11CF-A6D9-00AA0062CE6C' => { Name => 'Header', SubDirectory => { TagTable => 'Image::ExifTool::ASF::Header', Size => 6 }, }, '75B22636-668E-11CF-A6D9-00AA0062CE6C' => 'Data', '33000890-E5B1-11CF-89F4-00A0C90349CB' => 'SimpleIndex', 'D6E229D3-35DA-11D1-9034-00A0C90349BE' => 'Index', 'FEB103F8-12AD-4C64-840F-2A1D2F7AD48C' => 'MediaIndex', '3CB73FD0-0C4A-4803-953D-EDF7B6228F0C' => 'TimecodeIndex', 'BE7ACFCB-97A9-42E8-9C71-999491E3AFAC' => { #2 Name => 'XMP', SubDirectory => { TagTable => 'Image::ExifTool::XMP::Main' }, }, ); # ASF header objects %Image::ExifTool::ASF::Header = ( PROCESS_PROC => \&ProcessASF, '8CABDCA1-A947-11CF-8EE4-00C00C205365' => { Name => 'FileProperties', SubDirectory => { TagTable => 'Image::ExifTool::ASF::FileProperties' }, }, 'B7DC0791-A9B7-11CF-8EE6-00C00C205365' => { Name => 'StreamProperties', SubDirectory => { TagTable => 'Image::ExifTool::ASF::StreamProperties' }, }, '5FBF03B5-A92E-11CF-8EE3-00C00C205365' => { Name => 'HeaderExtension', SubDirectory => { TagTable => 'Image::ExifTool::ASF::HeaderExtension', Size => 22 }, }, '86D15240-311D-11D0-A3A4-00A0C90348F6' => { Name => 'CodecList', SubDirectory => { TagTable => 'Image::ExifTool::ASF::CodecList' }, }, '1EFB1A30-0B62-11D0-A39B-00A0C90348F6' => 'ScriptCommand', 'F487CD01-A951-11CF-8EE6-00C00C205365' => 'Marker', 'D6E229DC-35DA-11D1-9034-00A0C90349BE' => 'BitrateMutualExclusion', '75B22635-668E-11CF-A6D9-00AA0062CE6C' => 'ErrorCorrection', '75B22633-668E-11CF-A6D9-00AA0062CE6C' => { Name => 'ContentDescription', SubDirectory => { TagTable => 'Image::ExifTool::ASF::ContentDescr' }, }, '2211B3FA-BD23-11D2-B4B7-00A0C955FC6E' => { Name => 'ContentBranding', SubDirectory => { TagTable => 'Image::ExifTool::ASF::ContentBranding' }, }, 'D2D0A440-E307-11D2-97F0-00A0C95EA850' => { Name => 'ExtendedContentDescr', SubDirectory => { TagTable => 'Image::ExifTool::ASF::ExtendedDescr' }, }, '7BF875CE-468D-11D1-8D82-006097C9A2B2' => 'StreamBitrateProps', '2211B3FB-BD23-11D2-B4B7-00A0C955FC6E' => 'ContentEncryption', '298AE614-2622-4C17-B935-DAE07EE9289C' => 'ExtendedContentEncryption', '2211B3FC-BD23-11D2-B4B7-00A0C955FC6E' => 'DigitalSignature', '1806D474-CADF-4509-A4BA-9AABCB96AAE8' => 'Padding', ); %Image::ExifTool::ASF::ContentDescr = ( PROCESS_PROC => \&ProcessContentDescription, GROUPS => { 2 => 'Video' }, 0 => 'Title', 1 => { Name => 'Author', Groups => { 2 => 'Author' } }, 2 => { Name => 'Copyright', Groups => { 2 => 'Author' } }, 3 => 'Description', 4 => 'Rating', ); %Image::ExifTool::ASF::ContentBranding = ( PROCESS_PROC => \&ProcessContentBranding, GROUPS => { 2 => 'Author' }, 0 => { Name => 'BannerImageType', PrintConv => { 0 => 'None', 1 => 'Bitmap', 2 => 'JPEG', 3 => 'GIF', }, }, 1 => { Name => 'BannerImage', Groups => { 2 => 'Preview' }, Binary => 1 }, 2 => 'BannerImageURL', 3 => 'CopyrightURL', ); # Note: Many of these tags are similar to those in Image::ExifTool::Microsoft::Xtra # and Image::ExifTool::WTV::Metadata # (tags in this table may have a leading "WM/" removed) %Image::ExifTool::ASF::ExtendedDescr = ( PROCESS_PROC => \&ProcessExtendedContentDescription, GROUPS => { 2 => 'Video' }, ASFLeakyBucketPairs => { Binary => 1 }, AspectRatioX => {}, AspectRatioY => {}, Author => { Groups => { 2 => 'Author' } }, AverageLevel => {}, BannerImageData => {}, BannerImageType => {}, BannerImageURL => {}, Bitrate => { PrintConv => 'ConvertBitrate($val)' }, Broadcast => {}, BufferAverage => {}, Can_Skip_Backward => {}, Can_Skip_Forward => {}, Copyright => { Groups => { 2 => 'Author' } }, CopyrightURL => { Groups => { 2 => 'Author' } }, CurrentBitrate => { PrintConv => 'ConvertBitrate($val)' }, Description => {}, DRM_ContentID => {}, DRM_DRMHeader_ContentDistributor => {}, DRM_DRMHeader_ContentID => {}, DRM_DRMHeader_IndividualizedVersion => {}, DRM_DRMHeader_KeyID => {}, DRM_DRMHeader_LicenseAcqURL => {}, DRM_DRMHeader_SubscriptionContentID => {}, DRM_DRMHeader => {}, DRM_IndividualizedVersion => {}, DRM_KeyID => {}, DRM_LASignatureCert => {}, DRM_LASignatureLicSrvCert => {}, DRM_LASignaturePrivKey => {}, DRM_LASignatureRootCert => {}, DRM_LicenseAcqURL => {}, DRM_V1LicenseAcqURL => {}, Duration => { PrintConv => 'ConvertDuration($val)' }, FileSize => {}, HasArbitraryDataStream => {}, HasAttachedImages => {}, HasAudio => {}, HasFileTransferStream => {}, HasImage => {}, HasScript => {}, HasVideo => {}, Is_Protected => {}, Is_Trusted => {}, IsVBR => {}, NSC_Address => {}, NSC_Description => {}, NSC_Email => {}, NSC_Name => {}, NSC_Phone => {}, NumberOfFrames => {}, OptimalBitrate => { PrintConv => 'ConvertBitrate($val)' }, PeakValue => {}, Rating => {}, Seekable => {}, Signature_Name => {}, Stridable => {}, Title => {}, VBRPeak => {}, # "WM/" tags... AlbumArtist => {}, AlbumCoverURL => {}, AlbumTitle => {}, ASFPacketCount => {}, ASFSecurityObjectsSize => {}, AudioFileURL => {}, AudioSourceURL => {}, AuthorURL => { Groups => { 2 => 'Author' } }, BeatsPerMinute => {}, Category => {}, Codec => {}, Composer => {}, Conductor => {}, ContainerFormat => {}, ContentDistributor => {}, ContentGroupDescription => {}, Director => {}, DRM => {}, DVDID => {}, EncodedBy => {}, EncodingSettings => {}, EncodingTime => { Groups => { 2 => 'Time' }, PrintConv => '$self->ConvertDateTime($val)' }, Genre => {}, GenreID => {}, InitialKey => {}, ISRC => {}, Language => {}, Lyrics => {}, Lyrics_Synchronised => {}, MCDI => {}, MediaClassPrimaryID => { ValueConv => 'Image::ExifTool::ASF::GetGUID($val)' }, MediaClassSecondaryID => { ValueConv => 'Image::ExifTool::ASF::GetGUID($val)' }, MediaCredits => {}, MediaIsDelay => {}, MediaIsFinale => {}, MediaIsLive => {}, MediaIsPremiere => {}, MediaIsRepeat => {}, MediaIsSAP => {}, MediaIsStereo => {}, MediaIsSubtitled => {}, MediaIsTape => {}, MediaNetworkAffiliation => {}, MediaOriginalBroadcastDateTime => { Groups => { 2 => 'Time' }, ValueConv => '$val=~tr/-T/: /; $val', PrintConv => '$self->ConvertDateTime($val)', }, MediaOriginalChannel => {}, MediaStationCallSign => {}, MediaStationName => {}, ModifiedBy => {}, Mood => {}, OriginalAlbumTitle => {}, OriginalArtist => {}, OriginalFilename => 'OriginalFileName', OriginalLyricist => {}, OriginalReleaseTime => { Groups => { 2 => 'Time' }, ValueConv => '$val=~tr/-T/: /; $val', PrintConv => '$self->ConvertDateTime($val)', }, OriginalReleaseYear => { Groups => { 2 => 'Time' } }, ParentalRating => {}, ParentalRatingReason => {}, PartOfSet => {}, PeakBitrate => { PrintConv => 'ConvertBitrate($val)' }, Period => {}, Picture => { SubDirectory => { TagTable => 'Image::ExifTool::ASF::Picture', }, }, PlaylistDelay => {}, Producer => {}, PromotionURL => {}, ProtectionType => {}, Provider => {}, ProviderCopyright => {}, ProviderRating => {}, ProviderStyle => {}, Publisher => {}, RadioStationName => {}, RadioStationOwner => {}, SharedUserRating => {}, StreamTypeInfo => {}, SubscriptionContentID => {}, SubTitle => 'Subtitle', SubTitleDescription => 'SubtitleDescription', Text => {}, ToolName => {}, ToolVersion => {}, Track => {}, TrackNumber => {}, UniqueFileIdentifier => {}, UserWebURL => {}, VideoClosedCaptioning => {}, VideoFrameRate => {}, VideoHeight => {}, VideoWidth => {}, WMADRCAverageReference => {}, WMADRCAverageTarget => {}, WMADRCPeakReference => {}, WMADRCPeakTarget => {}, WMCollectionGroupID => {}, WMCollectionID => {}, WMContentID => {}, Writer => { Groups => { 2 => 'Author' } }, Year => { Groups => { 2 => 'Time' } }, ); %Image::ExifTool::ASF::Picture = ( PROCESS_PROC => \&ProcessPicture, GROUPS => { 2 => 'Image' }, 0 => { Name => 'PictureType', PrintConv => { # (Note: Duplicated in ID3, ASF and FLAC modules!) 0 => 'Other', 1 => '32x32 PNG Icon', 2 => 'Other Icon', 3 => 'Front Cover', 4 => 'Back Cover', 5 => 'Leaflet', 6 => 'Media', 7 => 'Lead Artist', 8 => 'Artist', 9 => 'Conductor', 10 => 'Band', 11 => 'Composer', 12 => 'Lyricist', 13 => 'Recording Studio or Location', 14 => 'Recording Session', 15 => 'Performance', 16 => 'Capture from Movie or Video', 17 => 'Bright(ly) Colored Fish', 18 => 'Illustration', 19 => 'Band Logo', 20 => 'Publisher Logo', }, }, 1 => 'PictureMIMEType', 2 => 'PictureDescription', 3 => { Name => 'Picture', Groups => { 2 => 'Preview' }, Binary => 1, }, ); %Image::ExifTool::ASF::FileProperties = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, GROUPS => { 2 => 'Video' }, 0 => { Name => 'FileID', Format => 'binary[16]', ValueConv => 'Image::ExifTool::ASF::GetGUID($val)', }, 16 => { Name => 'FileLength', Format => 'int64u' }, 24 => { Name => 'CreationDate', Format => 'int64u', Groups => { 2 => 'Time' }, # time is in 100 ns intervals since 0:00 UTC Jan 1, 1601 ValueConv => q{ # (89 leap years between 1601 and 1970) my $t = $val / 1e7 - (((1970-1601)*365+89)*24*3600); return Image::ExifTool::ConvertUnixTime($t) . 'Z'; }, PrintConv => '$self->ConvertDateTime($val)', }, 32 => { Name => 'DataPackets', Format => 'int64u' }, 40 => { Name => 'Duration', Format => 'int64u', Notes => 'called PlayDuration by the ASF spec', Priority => 0, ValueConv => '$val / 1e7', PrintConv => 'ConvertDuration($val)', }, 48 => { Name => 'SendDuration', Format => 'int64u', ValueConv => '$val / 1e7', PrintConv => 'ConvertDuration($val)', }, 56 => { Name => 'Preroll', Format => 'int64u' }, 64 => { Name => 'Flags', Format => 'int32u' }, 68 => { Name => 'MinPacketSize',Format => 'int32u' }, 72 => { Name => 'MaxPacketSize',Format => 'int32u' }, 76 => { Name => 'MaxBitrate', Format => 'int32u', PrintConv => 'ConvertBitrate($val)' }, ); %Image::ExifTool::ASF::StreamProperties = ( PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData, GROUPS => { 2 => 'Video' }, NOTES => 'Tags with index 54 and greater are conditional based on the StreamType.', 0 => { Name => 'StreamType', Format => 'binary[16]', RawConv => sub { # set ASF_STREAM_TYPE for use in conditional tags my ($val, $et) = @_; $$et{ASF_STREAM_TYPE} = $streamType{GetGUID($val)} || ''; return $val; }, ValueConv => 'Image::ExifTool::ASF::GetGUID($val)', PrintConv => \%streamType, }, 16 => { Name => 'ErrorCorrectionType', Format => 'binary[16]', ValueConv => 'Image::ExifTool::ASF::GetGUID($val)', PrintConv => \%errorCorrection, }, 32 => { Name => 'TimeOffset', Format => 'int64u', ValueConv => '$val / 1e7', PrintConv => '"$val s"', }, 48 => { Name => 'StreamNumber', Format => 'int16u', PrintConv => '($val & 0x7f) . ($val & 0x8000 ? " (encrypted)" : "")', }, 54 => [ { Condition => '$self->{ASF_STREAM_TYPE} eq "Audio"', Name => 'AudioCodecID', Format => 'int16u', PrintHex => 1, SeparateTable => 'RIFF AudioEncoding', PrintConv => \%Image::ExifTool::RIFF::audioEncoding, }, { Condition => '$self->{ASF_STREAM_TYPE} =~ /^(Video|JFIF|Degradable JPEG)$/', Name => 'ImageWidth', Format => 'int32u', }, ], 56 => { Condition => '$self->{ASF_STREAM_TYPE} eq "Audio"', Name => 'AudioChannels', Format => 'int16u', }, 58 => [ { Condition => '$self->{ASF_STREAM_TYPE} eq "Audio"', Name => 'AudioSampleRate', Format => 'int32u', }, { Condition => '$self->{ASF_STREAM_TYPE} =~ /^(Video|JFIF|Degradable JPEG)$/', Name => 'ImageHeight', Format => 'int32u', }, ], ); %Image::ExifTool::ASF::HeaderExtension = ( PROCESS_PROC => \&ProcessASF, '14E6A5CB-C672-4332-8399-A96952065B5A' => 'ExtendedStreamProps', 'A08649CF-4775-4670-8A16-6E35357566CD' => 'AdvancedMutualExcl', 'D1465A40-5A79-4338-B71B-E36B8FD6C249' => 'GroupMutualExclusion', 'D4FED15B-88D3-454F-81F0-ED5C45999E24' => 'StreamPrioritization', 'A69609E6-517B-11D2-B6AF-00C04FD908E9' => 'BandwidthSharing', '7C4346A9-EFE0-4BFC-B229-393EDE415C85' => 'LanguageList', 'C5F8CBEA-5BAF-4877-8467-AA8C44FA4CCA' => { Name => 'Metadata', SubDirectory => { # have seen some tags same as ExtendedDescr, so use this table - PH TagTable => 'Image::ExifTool::ASF::ExtendedDescr', ProcessProc => \&ProcessMetadata, }, }, '44231C94-9498-49D1-A141-1D134E457054' => { Name => 'MetadataLibrary', SubDirectory => { # have seen some tags same as ExtendedDescr, so use this table - PH TagTable => 'Image::ExifTool::ASF::ExtendedDescr', ProcessProc => \&ProcessMetadata, }, }, 'D6E229DF-35DA-11D1-9034-00A0C90349BE' => 'IndexParameters', '6B203BAD-3F11-48E4-ACA8-D7613DE2CFA7' => 'TimecodeIndexParms', '75B22630-668E-11CF-A6D9-00AA0062CE6C' => 'Compatibility', '43058533-6981-49E6-9B74-AD12CB86D58C' => 'AdvancedContentEncryption', 'ABD3D211-A9BA-11cf-8EE6-00C00C205365' => 'Reserved1', ); %Image::ExifTool::ASF::CodecList = ( PROCESS_PROC => \&ProcessCodecList, VideoCodecName => {}, VideoCodecDescription => {}, AudioCodecName => {}, AudioCodecDescription => {}, OtherCodecName => {}, OtherCodecDescription => {}, ); #------------------------------------------------------------------------------ # Generate GUID from 16 bytes of binary data # Inputs: 0) data # Returns: GUID sub GetGUID($) { # must do some byte swapping my $val = shift; return $val unless length($val) == 16; my $buff = unpack('H*',pack('NnnNN',unpack('VvvNN',$val))); $buff =~ s/(.{8})(.{4})(.{4})(.{4})/$1-$2-$3-$4-/; return uc($buff); } #------------------------------------------------------------------------------ # Process ASF content description # Inputs: 0) ExifTool object reference, 1) dirInfo ref, 2) tag table reference # Returns: 1 on success sub ProcessContentDescription($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $dirLen = $$dirInfo{DirLen}; return 0 if $dirLen < 10; my @len = unpack('v5', $$dataPt); my $pos = 10; my $tag; foreach $tag (0..4) { my $len = shift @len; next unless $len; return 0 if $pos + $len > $dirLen; my $val = $et->Decode(substr($$dataPt,$pos,$len),'UCS2','II'); $et->HandleTag($tagTablePtr, $tag, $val); $pos += $len; } return 1; } #------------------------------------------------------------------------------ # Process ASF content branding # Inputs: 0) ExifTool object reference, 1) dirInfo ref, 2) tag table reference # Returns: 1 on success sub ProcessContentBranding($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $dirLen = $$dirInfo{DirLen}; return 0 if $dirLen < 40; # decode banner image type $et->HandleTag($tagTablePtr, 0, unpack('V', $$dataPt)); # decode banner image, banner URL and copyright URL my $pos = 4; my $tag; foreach $tag (1..3) { return 0 if $pos + 4 > $dirLen; my $size = unpack("x${pos}V", $$dataPt); $pos += 4; next unless $size; return 0 if $pos + $size > $dirLen; my $val = substr($$dataPt, $pos, $size); $et->HandleTag($tagTablePtr, $tag, $val); $pos += $size; } return 1; } #------------------------------------------------------------------------------ # Read ASF value # Inputs: 0) ExifTool object ref, 1) data reference, 2) value offset, # 3) format number, 4) size # Returns: converted value sub ReadASF($$$$$) { my ($et, $dataPt, $pos, $format, $size) = @_; my @vals; if ($format == 0) { # unicode string $vals[0] = $et->Decode(substr($$dataPt,$pos,$size),'UCS2','II'); } elsif ($format == 2) { # 4-byte boolean @vals = ReadValue($dataPt, $pos, 'int32u', undef, $size); foreach (@vals) { $_ = $_ ? 'True' : 'False'; } } elsif ($format == 3) { # int32u @vals = ReadValue($dataPt, $pos, 'int32u', undef, $size); } elsif ($format == 4) { # int64u @vals = ReadValue($dataPt, $pos, 'int64u', undef, $size); } elsif ($format == 5) { # int16u @vals = ReadValue($dataPt, $pos, 'int16u', undef, $size); } else { # any other format (including 1, byte array): return raw data $vals[0] = substr($$dataPt,$pos,$size); } return join ' ', @vals; } #------------------------------------------------------------------------------ # Process extended content description # Inputs: 0) ExifTool object reference, 1) dirInfo ref, 2) tag table reference # Returns: 1 on success sub ProcessExtendedContentDescription($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $dirLen = $$dirInfo{DirLen}; return 0 if $dirLen < 2; my $count = Get16u($dataPt, 0); $et->VerboseDir($dirInfo, $count); my $pos = 2; my $i; for ($i=0; $i<$count; ++$i) { return 0 if $pos + 6 > $dirLen; my $nameLen = unpack("x${pos}v", $$dataPt); $pos += 2; return 0 if $pos + $nameLen + 4 > $dirLen; my $tag = Image::ExifTool::Decode(undef,substr($$dataPt,$pos,$nameLen),'UCS2','II','Latin'); $tag =~ s/^WM\///; # remove leading "WM/" $pos += $nameLen; my ($dType, $dLen) = unpack("x${pos}v2", $$dataPt); $pos += 4; return 0 if $pos + $dLen > $dirLen; my $val = ReadASF($et,$dataPt,$pos,$dType,$dLen); $et->HandleTag($tagTablePtr, $tag, $val, DataPt => $dataPt, Start => $pos, Size => $dLen, ); $pos += $dLen; } return 1; } #------------------------------------------------------------------------------ # Process ASF metadata library (similar to ProcessExtendedContentDescription above) # Inputs: 0) ExifTool object reference, 1) dirInfo ref, 2) tag table reference # Returns: 1 on success sub ProcessMetadata($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $dirLen = $$dirInfo{DirLen}; return 0 if $dirLen < 2; my $count = Get16u($dataPt, 0); $et->VerboseDir($dirInfo, $count); my $pos = 2; my $i; for ($i=0; $i<$count; ++$i) { return 0 if $pos + 12 > $dirLen; my ($index, $stream, $nameLen, $dType, $dLen) = unpack("x${pos}v4V", $$dataPt); $pos += 12; return 0 if $pos + $nameLen + $dLen > $dirLen; my $tag = Image::ExifTool::Decode(undef,substr($$dataPt,$pos,$nameLen),'UCS2','II','Latin'); $tag =~ s/^WM\///; # remove leading "WM/" $pos += $nameLen; my $val = ReadASF($et,$dataPt,$pos,$dType,$dLen); $et->HandleTag($tagTablePtr, $tag, $val, DataPt => $dataPt, Start => $pos, Size => $dLen, ); $pos += $dLen; } return 1; } #------------------------------------------------------------------------------ # Process WM/Picture preview # Inputs: 0) ExifTool object reference, 1) dirInfo ref, 2) tag table reference # Returns: 1 on success sub ProcessPicture($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $dirStart = $$dirInfo{DirStart}; my $dirLen = $$dirInfo{DirLen}; return 0 unless $dirLen > 9; # extract picture type and length my ($type, $picLen) = unpack("x${dirStart}CV", $$dataPt); $et->VerboseDir('Picture'); $et->HandleTag($tagTablePtr, 0, $type); # extract mime type and description strings (null-terminated unicode strings) my $n = $dirLen - 5 - $picLen; return 0 if $n & 0x01 or $n < 4; my $str = substr($$dataPt, $dirStart+5, $n); if ($str =~ /^((?:..)*?)\0\0((?:..)*?)\0\0/s) { my ($mime, $desc) = ($1, $2); $et->HandleTag($tagTablePtr, 1, $et->Decode($mime,'UCS2','II')); $et->HandleTag($tagTablePtr, 2, $et->Decode($desc,'UCS2','II')) if length $desc; } $et->HandleTag($tagTablePtr, 3, substr($$dataPt, $dirStart+5+$n, $picLen)); return 1; } #------------------------------------------------------------------------------ # Process codec list # Inputs: 0) ExifTool object reference, 1) dirInfo ref, 2) tag table reference # Returns: 1 on success sub ProcessCodecList($$$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $dataPt = $$dirInfo{DataPt}; my $dirLen = $$dirInfo{DirLen}; return 0 if $dirLen < 20; my $count = Get32u($dataPt, 16); $et->VerboseDir($dirInfo, $count); my $pos = 20; my $i; my %codecType = ( 1 => 'Video', 2 => 'Audio' ); for ($i=0; $i<$count; ++$i) { return 0 if $pos + 8 > $dirLen; my $type = ($codecType{Get16u($dataPt, $pos)} || 'Other') . 'Codec'; # stupid Windows programmers: these lengths are in characters (others are in bytes) my $nameLen = Get16u($dataPt, $pos + 2) * 2; $pos += 4; return 0 if $pos + $nameLen + 2 > $dirLen; my $name = $et->Decode(substr($$dataPt,$pos,$nameLen),'UCS2','II'); $et->HandleTag($tagTablePtr, "${type}Name", $name); my $descLen = Get16u($dataPt, $pos + $nameLen) * 2; $pos += $nameLen + 2; return 0 if $pos + $descLen + 2 > $dirLen; my $desc = $et->Decode(substr($$dataPt,$pos,$descLen),'UCS2','II'); $et->HandleTag($tagTablePtr, "${type}Description", $desc); my $infoLen = Get16u($dataPt, $pos + $descLen); $pos += $descLen + 2 + $infoLen; } return 1; } #------------------------------------------------------------------------------ # Extract information from a ASF file # Inputs: 0) ExifTool object reference, 1) dirInfo reference, 2) tag table ref # Returns: 1 on success, 0 if this wasn't a valid ASF file sub ProcessASF($$;$) { my ($et, $dirInfo, $tagTablePtr) = @_; my $raf = $$dirInfo{RAF}; my $verbose = $et->Options('Verbose'); my $rtnVal = 0; my $pos = 0; my ($buff, $err, @parentTable, @childEnd); for (;;) { last unless $raf->Read($buff, 24) == 24; $pos += 24; my $tag = GetGUID(substr($buff,0,16)); unless ($tagTablePtr) { # verify this is a valid ASF file last unless $tag eq '75B22630-668E-11CF-A6D9-00AA0062CE6C'; my $fileType = $$et{FILE_EXT}; $fileType = 'ASF' unless $fileType and $fileType =~ /^(ASF|WMV|WMA|DIVX)$/; $et->SetFileType($fileType); SetByteOrder('II'); $tagTablePtr = GetTagTable('Image::ExifTool::ASF::Main'); $rtnVal = 1; } my $size = Image::ExifTool::Get64u(\$buff, 16) - 24; if ($size < 0) { $err = 'Invalid ASF object size'; last; } if ($size > 0x7fffffff) { if ($size > 0x7fffffff * 4294967296) { $err = 'Invalid ASF object size'; } elsif ($et->Options('LargeFileSupport')) { if ($raf->Seek($size, 1)) { $et->VPrint(0, " Skipped large ASF object ($size bytes)\n"); $pos += $size; next; } $err = 'Error seeking past large ASF object'; } else { $err = 'Large ASF objects not supported (LargeFileSupport not set)'; } last; } # go back to parent tag table if done with previous children if (@childEnd and $pos >= $childEnd[-1]) { pop @childEnd; $tagTablePtr = pop @parentTable; $$et{INDENT} = substr($$et{INDENT},0,-2); } my $tagInfo = $et->GetTagInfo($tagTablePtr, $tag); $verbose and $et->VerboseInfo($tag, $tagInfo); if ($tagInfo) { my $subdir = $$tagInfo{SubDirectory}; if ($subdir) { my $subTable = GetTagTable($$subdir{TagTable}); if ($$subTable{PROCESS_PROC} eq \&ProcessASF) { if (defined $$subdir{Size}) { my $s = $$subdir{Size}; if ($verbose > 2) { $raf->Read($buff, $s) == $s or $err = 'Truncated file', last; $et->VerboseDump(\$buff); } elsif (not $raf->Seek($s, 1)) { $err = 'Seek error'; last; } # continue processing linearly using subTable push @parentTable, $tagTablePtr; push @childEnd, $pos + $size; $tagTablePtr = $subTable; $pos += $$subdir{Size}; if ($verbose) { $$et{INDENT} .= '| '; $et->VerboseDir($$tagInfo{Name}); } next; } } elsif ($raf->Read($buff, $size) == $size) { my %subdirInfo = ( DataPt => \$buff, DirStart => 0, DirLen => $size, DirName => $$tagInfo{Name}, ); $et->VerboseDump(\$buff) if $verbose > 2; unless ($et->ProcessDirectory(\%subdirInfo, $subTable, $$subdir{ProcessProc})) { $et->Warn("Error processing $$tagInfo{Name} directory"); } $pos += $size; next; } else { $err = 'Unexpected end of file'; last; } } } if ($verbose > 2) { $raf->Read($buff, $size) == $size or $err = 'Truncated file', last; $et->VerboseDump(\$buff); } elsif (not $raf->Seek($size, 1)) { # skip the block $err = 'Seek error'; last; } $pos += $size; } $err and $et->Warn($err); return $rtnVal; } 1; # end __END__ =head1 NAME Image::ExifTool::ASF - Read ASF/WMA/WMV meta information =head1 SYNOPSIS This module is used by Image::ExifTool =head1 DESCRIPTION This module contains routines required by Image::ExifTool to extract information from Microsoft Advanced Systems Format (ASF) files, including Windows Media Audio (WMA) and Windows Media Video (WMV) files. =head1 AUTHOR Copyright 2003-2018, Phil Harvey (phil at owl.phy.queensu.ca) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. =head1 REFERENCES =over 4 =item L =back =head1 SEE ALSO L, L =cut