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- #------------------------------------------------------------------------------
- # 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 = '1.23';
- 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',
- );
- %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' } },
- 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' } },
- MediaOriginalChannel => {},
- MediaStationCallSign => {},
- MediaStationName => {},
- ModifiedBy => {},
- Mood => {},
- OriginalAlbumTitle => {},
- OriginalArtist => {},
- OriginalFilename => 'OriginalFileName',
- OriginalLyricist => {},
- OriginalReleaseTime => { Groups => { 2 => 'Time' } },
- 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 => 'PlayDuration',
- Format => 'int64u',
- 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 2003-2016, 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<http://www.microsoft.com/windows/windowsmedia/format/asfspec.aspx>
- =back
- =head1 SEE ALSO
- L<Image::ExifTool::TagNames/ASF Tags>,
- L<Image::ExifTool(3pm)|Image::ExifTool>
- =cut
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