/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="File.IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public File(File.IFileAbstraction abstraction,
ReadStyle propertiesStyle)
: base(abstraction)
{
Magic = 85; // Panasonic uses 0x55
Read (propertiesStyle);
}
public AsfProperties(AsfHeaderObject header, ReadStyle style) : base(style)
{
duration = TimeSpan.Zero;
//codecId = 0;
//channels = 0;
//sampleRate = 0;
//bytesPerSecond = 0;
foreach (AsfObject obj in header.Children)
{
if (obj is AsfFilePropertiesObject)
duration = ((AsfFilePropertiesObject)obj).PlayDuration;
if (obj is AsfStreamPropertiesObject && bytesPerSecond == 0)
{
AsfStreamPropertiesObject stream = (AsfStreamPropertiesObject)obj;
if (!stream.StreamType.Equals(AsfGuid.AsfAudioMedia))
continue;
ByteVector data = stream.TypeSpecificData;
codecId = data.Mid(0, 2).ToShort(false);
channels = data.Mid(2, 2).ToShort(false);
sampleRate = data.Mid(4, 4).ToUInt(false);
bytesPerSecond = data.Mid(8, 4).ToUInt(false);
}
}
}
protected override void ReadStart(long start, ReadStyle propertiesStyle)
{
if ((propertiesStyle != ReadStyle.None) && !AudioHeader.Find(out this.first_header, this, start, 0x4000))
{
throw new CorruptFileException("MPEG audio header not found.");
}
}
protected OggFlacFile(string file, ReadStyle propertiesStyle) : base(file)
{
//comment = null;
//properties = null;
//stream_info_data = null;
//xiph_comment_data = null;
//stream_start = 0;
//stream_length = 0;
//scanned = false;
//has_xiph_comment = false;
//comment_packet = 0;
try
{
Mode = FileAccessMode.Read;
}
catch (TagLibException)
{
scanned = true;
return;
}
Read(propertiesStyle);
Mode = FileAccessMode.Closed;
}
public FlacFile(string file, ReadStyle propertiesStyle) : base (file)
{
//id3v2Tag = null;
//id3v1Tag = null;
//comment = null;
//properties = null;
//flac_start = 0;
//stream_start = 0;
//stream_length = 0;
//scanned = false;
tag = new CombinedTag();
try
{
Mode = FileAccessMode.Read;
}
catch (TagLibException)
{
return;
}
Read(propertiesStyle);
Mode = FileAccessMode.Closed;
}
protected override void ReadStart(long start, ReadStyle propertiesStyle)
{
if ((this.header_block == null) || (propertiesStyle != ReadStyle.None))
{
base.Seek(start);
this.header_block = base.ReadBlock(0x20);
}
}
private void Read(ReadStyle propertiesStyle)
{
AsfHeaderObject header = new AsfHeaderObject(this, 0);
asfTag = new AsfTag(header);
if (propertiesStyle != ReadStyle.None)
properties = new AsfProperties(header, propertiesStyle);
}
public FlacProperties(ByteVector data, long streamLength, ReadStyle style) : base(style)
{
duration = TimeSpan.Zero;
//bitrate = 0;
//sample_rate = 0;
//sample_width = 0;
//channels = 0;
Read(data, streamLength); // the old version of this had style as the third parameter
}
private void Read(bool read_tags, ReadStyle style, out uint aiff_size, out long tag_start, out long tag_end)
{
base.Seek(0L);
if (base.ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException("File does not begin with AIFF identifier");
}
aiff_size = base.ReadBlock(4).ToUInt(true);
tag_start = -1L;
tag_end = -1L;
if ((this.header_block == null) && (style != ReadStyle.None))
{
long offset = base.Find(CommIdentifier, 0L);
if (offset == -1L)
{
throw new CorruptFileException("No Common chunk available in AIFF file.");
}
base.Seek(offset);
this.header_block = base.ReadBlock(0x1a);
StreamHeader header = new StreamHeader(this.header_block, (long) ((ulong) aiff_size));
ICodec[] codecs = new ICodec[] { header };
this.properties = new TagLib.Properties(TimeSpan.Zero, codecs);
}
long num2 = -1L;
if (base.Find(SoundIdentifier, 0L, ID3Identifier) == -1L)
{
num2 = base.Find(ID3Identifier, 0L);
}
long num3 = base.Find(SoundIdentifier, 0L);
if (num3 == -1L)
{
throw new CorruptFileException("No Sound chunk available in AIFF file.");
}
base.Seek(num3 + 4L);
long startPosition = (((long) base.ReadBlock(4).ToULong(true)) + num3) + 4L;
if (num2 == -1L)
{
num2 = base.Find(ID3Identifier, startPosition);
}
if (num2 > -1L)
{
if (read_tags && (this.tag == null))
{
this.tag = new TagLib.Id3v2.Tag(this, num2 + 8L);
}
base.Seek(num2 + 4L);
uint num6 = base.ReadBlock(4).ToUInt(true) + 8;
long num7 = num2;
base.InvariantStartPosition = num7;
tag_start = num7;
num7 = tag_start + num6;
base.InvariantEndPosition = num7;
tag_end = num7;
}
}
public File (File.IFileAbstraction abstraction,
ReadStyle propertiesStyle) : base (abstraction)
{
Mode = AccessMode.Read;
try {
tag = new GroupedComment ();
Read (propertiesStyle);
TagTypesOnDisk = TagTypes;
} finally {
Mode = AccessMode.Closed;
}
}
private void Read(ReadStyle propertiesStyle)
{
this.tag = new CombinedTag();
base.Mode = TagLib.File.AccessMode.Read;
try
{
FileParser parser = new FileParser(this);
if (propertiesStyle == ReadStyle.None)
{
parser.ParseTag();
}
else
{
parser.ParseTagAndProperties();
}
base.InvariantStartPosition = parser.MdatStartPosition;
base.InvariantEndPosition = parser.MdatEndPosition;
this.udta_box = parser.UserDataBox;
if (((this.udta_box != null) && (this.udta_box.GetChild(BoxType.Meta) != null)) && (this.udta_box.GetChild(BoxType.Meta).GetChild(BoxType.Ilst) != null))
{
base.TagTypesOnDisk |= TagTypes.Apple;
}
if (this.udta_box == null)
{
this.udta_box = new IsoUserDataBox();
}
this.apple_tag = new AppleTag(this.udta_box);
TagLib.Tag[] tags = new TagLib.Tag[] { this.apple_tag };
this.tag.SetTags(tags);
if (propertiesStyle == ReadStyle.None)
{
base.Mode = TagLib.File.AccessMode.Closed;
}
else
{
IsoMovieHeaderBox movieHeaderBox = parser.MovieHeaderBox;
if (movieHeaderBox == null)
{
base.Mode = TagLib.File.AccessMode.Closed;
throw new CorruptFileException("mvhd box not found.");
}
IsoAudioSampleEntry audioSampleEntry = parser.AudioSampleEntry;
IsoVisualSampleEntry visualSampleEntry = parser.VisualSampleEntry;
ICodec[] codecs = new ICodec[] { audioSampleEntry, visualSampleEntry };
this.properties = new TagLib.Properties(movieHeaderBox.Duration, codecs);
}
}
finally
{
base.Mode = TagLib.File.AccessMode.Closed;
}
}
public OggVorbisProperties(OggVorbisFile file, ReadStyle style) : base(style)
{
duration = TimeSpan.Zero;
//bitrate = 0;
//sample_rate = 0;
//channels = 0;
//vorbis_version = 0;
//bitrate_maximum = 0;
//bitrate_nominal = 0;
//bitrate_minimum = 0;
Read(file); // the old version of this had style as the second parameter
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="File.IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public File(File.IFileAbstraction abstraction,
ReadStyle propertiesStyle)
: base(abstraction)
{
ImageTag = new CombinedImageTag (TagTypes.TiffIFD | TagTypes.XMP);
Mode = AccessMode.Read;
try {
Read (propertiesStyle);
TagTypesOnDisk = TagTypes;
} finally {
Mode = AccessMode.Closed;
}
}
public File(TagLib.File.IFileAbstraction abstraction, ReadStyle propertiesStyle) : base(abstraction)
{
base.Mode = TagLib.File.AccessMode.Read;
try
{
this.tag = new GroupedComment();
this.Read(propertiesStyle);
base.TagTypesOnDisk = base.TagTypes;
}
finally
{
base.Mode = TagLib.File.AccessMode.Closed;
}
}
//////////////////////////////////////////////////////////////////////////
// public methods
//////////////////////////////////////////////////////////////////////////
public MpegProperties (MpegFile file, ReadStyle style) : base (style)
{
this.file = file;
duration = TimeSpan.Zero;
//bitrate = 0;
//sample_rate = 0;
//channels = 0;
version = MpegVersion.One;
//layer = 0;
channel_mode = MpegChannelMode.Stereo;
//is_copyrighted = false;
//is_original = false;
Read();
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified path in the local file
/// system and specified read style.
/// </summary>
/// <param name="path">
/// A <see cref="string" /> object containing the path of the
/// file to use in the new instance.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="path" /> is <see langword="null" />.
/// </exception>
public File (string path, ReadStyle propertiesStyle, CUETools.Processor.CUEToolsTagger _tagger)
: base (path, propertiesStyle)
{
tagger = _tagger;
// Make sure we have a tag.
switch (tagger)
{
case CUETools.Processor.CUEToolsTagger.APEv2:
GetTag(TagTypes.Ape, true);
break;
case CUETools.Processor.CUEToolsTagger.ID3v2:
GetTag(TagTypes.Id3v2, true);
break;
}
}
private GeoInfo()
{
this.m_CurrentReadStyle = ReadStyle.ClosestResolution;
this.m_ClutterlayerIndex = 0;
this.m_geoClutterCalcBound = null;
this.m_HeightlayerIndex = 0;
this.m_geoHeightCalcBound = null;
this.m_BuildinglayerIndex = 0;
this.m_geoBuildingCalcBound = null;
this.pointThreadTag = new object();
this.lineThreadTag = new object();
this.boundThreadTag = new object();
this.m_IsGeoXYLinePointCalc = false;
this.m_ClutterIDInLine = null;
this.m_PointListOfClutterID = null;
}
public File(TagLib.File.IFileAbstraction abstraction, ReadStyle propertiesStyle) : base(abstraction)
{
base.Mode = TagLib.File.AccessMode.Read;
try
{
uint num;
long num2;
long num3;
this.Read(true, propertiesStyle, out num, out num2, out num3);
}
finally
{
base.Mode = TagLib.File.AccessMode.Closed;
}
base.TagTypesOnDisk = base.TagTypes;
this.GetTag(TagTypes.None | TagTypes.Id3v2, true);
}
//////////////////////////////////////////////////////////////////////////
// public methods
//////////////////////////////////////////////////////////////////////////
public OggVorbisFile (string file, ReadStyle properties_style) : base (file)
{
//comment = null;
//properties = null;
try
{
Mode = FileAccessMode.Read;
}
catch (TagLibException)
{
return;
}
Read(properties_style);
Mode = FileAccessMode.Closed;
}
public AsfFile(string file, ReadStyle propertiesStyle) : base(file)
{
//asfTag = null;
//properties = null;
try
{
Mode = FileAccessMode.Read;
}
catch (TagLibException)
{
return;
}
Read(propertiesStyle);
Mode = FileAccessMode.Closed;
}
private void Read(ReadStyle propertiesStyle)
{
base.Mode = TagLib.File.AccessMode.Read;
try
{
this.tag = new TagLib.NonContainer.Tag(this);
base.InvariantStartPosition = this.tag.ReadStart();
base.TagTypesOnDisk |= this.StartTag.TagTypes;
this.ReadStart(base.InvariantStartPosition, propertiesStyle);
base.InvariantEndPosition = (base.InvariantStartPosition != base.Length) ? this.tag.ReadEnd() : base.Length;
base.TagTypesOnDisk |= this.EndTag.TagTypes;
this.ReadEnd(base.InvariantEndPosition, propertiesStyle);
this.properties = (propertiesStyle == ReadStyle.None) ? null : this.ReadProperties(base.InvariantStartPosition, base.InvariantEndPosition, propertiesStyle);
}
finally
{
base.Mode = TagLib.File.AccessMode.Closed;
}
}
private void Read(ReadStyle propertiesStyle)
{
long num;
Dictionary<uint, Bitstream> dictionary = this.ReadStreams(null, out num);
List<ICodec> codecs = new List<ICodec>();
base.InvariantStartPosition = num;
base.InvariantEndPosition = base.Length;
foreach (uint num2 in dictionary.Keys)
{
this.tag.AddComment(num2, dictionary[num2].Codec.CommentData);
codecs.Add(dictionary[num2].Codec);
}
if (propertiesStyle != ReadStyle.None)
{
PageHeader lastPageHeader = this.LastPageHeader;
TimeSpan duration = dictionary[lastPageHeader.StreamSerialNumber].GetDuration(lastPageHeader.AbsoluteGranularPosition);
this.properties = new TagLib.Properties(duration, codecs);
}
}
public WavPackFile(string file, ReadStyle propertiesStyle) : base(file)
{
//apeTag = null;
//id3v1Tag = null;
tag = new CombinedTag();
//properties = null;
try
{
Mode = FileAccessMode.Read;
}
catch (TagLibException)
{
return;
}
Read(propertiesStyle);
Mode = FileAccessMode.Closed;
}
public File (File.IFileAbstraction abstraction,
ReadStyle propertiesStyle) : base (abstraction)
{
uint riff_size;
long tag_start, tag_end;
Mode = AccessMode.Read;
try {
Read (true, propertiesStyle, out riff_size,
out tag_start, out tag_end);
} finally {
Mode = AccessMode.Closed;
}
TagTypesOnDisk = TagTypes;
GetTag (TagTypes.Id3v2, true);
GetTag (TagTypes.RiffInfo, true);
GetTag (TagTypes.MovieId, true);
GetTag (TagTypes.DivX, true);
}
public static TagLib.File Create(IFileAbstraction abstraction, string mimetype, ReadStyle propertiesStyle)
{
TagLib.File file3;
if (mimetype == null)
{
string str = string.Empty;
int startIndex = abstraction.Name.LastIndexOf(".") + 1;
if ((startIndex >= 1) && (startIndex < abstraction.Name.Length))
{
str = abstraction.Name.Substring(startIndex, abstraction.Name.Length - startIndex);
}
mimetype = "taglib/" + str.ToLower(CultureInfo.InvariantCulture);
}
foreach (FileTypeResolver resolver in file_type_resolvers)
{
TagLib.File file = resolver(abstraction, mimetype, propertiesStyle);
if (file != null)
{
return file;
}
}
if (!FileTypes.AvailableTypes.ContainsKey(mimetype))
{
object[] args = new object[] { abstraction.Name, mimetype };
throw new UnsupportedFormatException(string.Format(CultureInfo.InvariantCulture, "{0} ({1})", args));
}
Type type = FileTypes.AvailableTypes[mimetype];
try
{
object[] objArray2 = new object[] { abstraction, propertiesStyle };
TagLib.File file2 = (TagLib.File) Activator.CreateInstance(type, objArray2);
file2.MimeType = mimetype;
file3 = file2;
}
catch (TargetInvocationException exception)
{
throw exception.InnerException;
}
return file3;
}
public Mpeg4File(string file, ReadStyle propertiesStyle) : base(file)
{
// Nullify for safety.
//tag = null;
//properties = null;
// Try to open read support.
try
{
Mode = FileAccessMode.Read;
}
catch (TagLibException)
{
return;
}
// Read
Read(propertiesStyle);
// Be nice and close.
Mode = FileAccessMode.Closed;
}
private void Read (ReadStyle properties_style)
{
long end;
Dictionary<uint, Bitstream> streams = ReadStreams (null, out end);
List<ICodec> codecs = new List<ICodec> ();
InvariantStartPosition = end;
InvariantEndPosition = Length;
foreach (uint id in streams.Keys)
{
tag.AddComment (id, streams [id].Codec.CommentData);
codecs.Add (streams [id].Codec);
}
if (properties_style == ReadStyle.None)
return;
PageHeader last_header = LastPageHeader;
TimeSpan duration = streams [last_header.StreamSerialNumber].GetDuration (last_header.AbsoluteGranularPosition);
properties = new Properties (duration, codecs);
}
public GeoInfo(IGeoDataMgr IGeoDataMgr)
{
this.m_CurrentReadStyle = ReadStyle.ClosestResolution;
this.m_ClutterlayerIndex = 0;
this.m_geoClutterCalcBound = null;
this.m_HeightlayerIndex = 0;
this.m_geoHeightCalcBound = null;
this.m_BuildinglayerIndex = 0;
this.m_geoBuildingCalcBound = null;
this.pointThreadTag = new object();
this.lineThreadTag = new object();
this.boundThreadTag = new object();
this.m_IsGeoXYLinePointCalc = false;
this.m_ClutterIDInLine = null;
this.m_PointListOfClutterID = null;
this.m_GeoDataMgr = IGeoDataMgr;
this.m_DemDataColletion = new Dictionary<DemDataType, List<IGeoRasterData>>();
this.m_DemDataColletion.Add(DemDataType.Clutter, this.m_GeoDataMgr.ClutterRasterData);
this.m_DemDataColletion.Add(DemDataType.Height, this.m_GeoDataMgr.HeightRasterData);
this.m_DemDataColletion.Add(DemDataType.Building, this.m_GeoDataMgr.BuildingRasterData);
this.InitGetValueByPointDelegate();
}
/// <summary>
/// Reads format specific information at the end of the
/// file.
/// </summary>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or
/// <see
/// cref="ReadStyle.None" />
/// to ignore the properties.
/// </param>
protected override void ReadEnd(long end,
ReadStyle propertiesStyle)
{
}
public static File Create(string path, string mimetype, ReadStyle propertiesStyle)
{
return(Create(new LocalFileAbstraction(path), mimetype, propertiesStyle));
}
/// <summary>
/// Reads the tags stored at the end of the file into the
/// current instance.
/// </summary>
/// <returns>
/// A <see cref="long" /> value indicating the seek position
/// in the file at which the read tags begin. This also
/// marks the seek position at which the media ends.
/// </returns>
public long ReadEnd(ReadStyle style)
{
return(EndTag.Read(style));
}
/// <summary>
/// Reads format specific information at the end of the
/// file.
/// </summary>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
protected override void ReadEnd(long end, ReadStyle propertiesStyle)
{
// Make sure we have ID3v1 and ID3v2 tags.
GetTag(TagTypes.Id3v1, true);
GetTag(TagTypes.Id3v2, true);
}
/// <summary>
/// Reads the audio properties from the file represented by
/// the current instance.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value containing the seek position
/// at which the tags end and the media data begins.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <returns>
/// A <see cref="TagLib.Properties" /> object describing the
/// media properties of the file represented by the current
/// instance.
/// </returns>
/// <remarks>
/// This method is called ONLY IF the file is constructed
/// with a read style other than <see cref="ReadStyle.None"
/// />, and as such MUST NOT return <see langword="null" />.
/// It is guaranteed that <see cref="ReadStart" /> and <see
/// cref="ReadEnd" /> will have been called first and this
/// method should be strictly used to perform final
/// processing on already read data.
/// </remarks>
protected abstract Properties ReadProperties(long start,
long end,
ReadStyle propertiesStyle);
protected File(string path, ReadStyle propertiesStyle)
: base(path)
{
Read(propertiesStyle);
}
/// <summary>
/// Reads format specific information at the end of the
/// file.
/// </summary>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
protected override void ReadEnd(long end,
ReadStyle propertiesStyle)
{
// Make sure we have an APE tag.
GetTag(TagTypes.Ape, true);
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public File(File.IFileAbstraction abstraction,
ReadStyle propertiesStyle)
: base(abstraction, propertiesStyle)
{
}
protected override Properties ReadProperties(long start, long end, ReadStyle propertiesStyle)
{
first_header.SetStreamLength(end - start);
return(new Properties(TimeSpan.Zero, first_header));
}
protected override void ReadEnd(long end, ReadStyle propertiesStyle)
{
GetTag(TagTypes.Id3v1, true);
GetTag(TagTypes.Id3v2, true);
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public File(File.IFileAbstraction abstraction,
ReadStyle propertiesStyle) : base(abstraction)
{
Magic = 85; // Panasonic uses 0x55
Read(propertiesStyle);
}
/// <summary>
/// Reads format specific information at the end of the
/// file.
/// </summary>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
protected override void ReadEnd (long end,
ReadStyle propertiesStyle)
{
// Make sure we have ID3v1 and ID3v2 tags.
GetTag (TagTypes.Id3v1, true);
GetTag (TagTypes.Id3v2, true);
if (propertiesStyle == ReadStyle.None ||
start_time == null)
return;
RFindMarker (ref end, Marker.SystemSyncPacket);
end_time = ReadTimestamp (end + 4);
}
/// <summary>
/// Reads the tags stored at the start of the file into the
/// current instance.
/// </summary>
/// <returns>
/// A <see cref="long" /> value indicating the seek position
/// in the file at which the read tags end. This also
/// marks the seek position at which the media begins.
/// </returns>
public long ReadStart(ReadStyle style)
{
return(StartTag.Read(style));
}
public static File Create(string path, ReadStyle style)
{
return(Create(path, null, style));
}
/// <summary>
/// Reads the file with a specified read style.
/// </summary>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
private void Read(ReadStyle propertiesStyle)
{
// TODO: Support Id3v2 boxes!!!
tag = new CombinedTag();
Mode = AccessMode.Read;
try
{
FileParser parser = new FileParser(this);
if (propertiesStyle == ReadStyle.None)
{
parser.ParseTag();
}
else
{
parser.ParseTagAndProperties();
}
InvariantStartPosition = parser.MdatStartPosition;
InvariantEndPosition = parser.MdatEndPosition;
udta_boxes.AddRange(parser.UserDataBoxes);
// Ensure our collection contains at least a single empty box
if (udta_boxes.Count == 0)
{
IsoUserDataBox dummy = new IsoUserDataBox();
udta_boxes.Add(dummy);
}
// Check if a udta with ILST actually exists
if (IsAppleTagUdtaPresent())
{
TagTypesOnDisk |= TagTypes.Apple; //There is an udta present with ILST info
}
// Find the udta box with the Apple Tag ILST
IsoUserDataBox udtaBox = FindAppleTagUdta();
if (null == udtaBox)
{
udtaBox = new IsoUserDataBox();
}
apple_tag = new AppleTag(udtaBox);
tag.SetTags(apple_tag);
// If we're not reading properties, we're done.
if (propertiesStyle == ReadStyle.None)
{
Mode = AccessMode.Closed;
return;
}
// Get the movie header box.
IsoMovieHeaderBox mvhd_box = parser.MovieHeaderBox;
if (mvhd_box == null)
{
Mode = AccessMode.Closed;
throw new CorruptFileException(
"mvhd box not found.");
}
IsoAudioSampleEntry audio_sample_entry =
parser.AudioSampleEntry;
IsoVisualSampleEntry visual_sample_entry =
parser.VisualSampleEntry;
// Read the properties.
properties = new Properties(mvhd_box.Duration,
audio_sample_entry, visual_sample_entry);
}
finally
{
Mode = AccessMode.Closed;
}
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified path in the local file
/// system and specified read style.
/// </summary>
/// <param name="path">
/// A <see cref="string" /> object containing the path of the
/// file to use in the new instance.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="path" /> is <see langword="null" />.
/// </exception>
public File(string path, ReadStyle propertiesStyle)
: base(path, propertiesStyle)
{
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified path in the local file
/// system and specified read style.
/// </summary>
/// <param name="path">
/// A <see cref="string" /> object containing the path of the
/// file to use in the new instance.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="path" /> is <see langword="null" />.
/// </exception>
public File(string path, ReadStyle propertiesStyle)
: this(new LocalFileAbstraction(path), propertiesStyle)
{
}
/// <summary>
/// Reads the contents of the current instance determining
/// the size of the riff data, the area the tagging is in,
/// and optionally reading in the tags and media properties.
/// </summary>
/// <param name="read_tags">
/// If <see langword="true" />, any tags found will be read
/// into the current instance.
/// </param>
/// <param name="style">
/// A <see cref="ReadStyle"/> value specifying how the media
/// data is to be read into the current instance.
/// </param>
/// <param name="aiff_size">
/// A <see cref="uint"/> value reference to be filled with
/// the size of the RIFF data as read from the file.
/// </param>
/// <param name="tag_start">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// starts.
/// </param>
/// <param name="tag_end">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// ends.
/// </param>
/// <exception cref="CorruptFileException">
/// The file does not begin with <see cref="FileIdentifier"
/// />.
/// </exception>
private void Read(bool read_tags, ReadStyle style,
out uint aiff_size, out long tag_start,
out long tag_end)
{
Seek(0);
if (ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException(
"File does not begin with AIFF identifier");
}
aiff_size = ReadBlock(4).ToUInt(true);
tag_start = -1;
tag_end = -1;
// Get the properties of the file
if (header_block == null &&
style != ReadStyle.None)
{
long common_chunk_pos = Find(CommIdentifier, 0);
if (common_chunk_pos == -1)
{
throw new CorruptFileException(
"No Common chunk available in AIFF file.");
}
Seek(common_chunk_pos);
header_block = ReadBlock((int)StreamHeader.Size);
StreamHeader header = new StreamHeader(header_block, aiff_size);
properties = new Properties(TimeSpan.Zero, header);
}
// Now we search for the ID3 chunk.
// Normally it appears after the Sound data chunk. But as the order of
// chunks is free, it might be the case that the ID3 chunk appears before
// the sound data chunk.
// So we search first for the Sound data chunk and see, if an ID3 chunk appears before
long id3_chunk_pos = -1;
long sound_chunk_pos = Find(SoundIdentifier, 0, ID3Identifier);
if (sound_chunk_pos == -1)
{
// The ID3 chunk appears before the Sound chunk
id3_chunk_pos = Find(ID3Identifier, 0);
}
// Now let's look for the Sound chunk again
// Since a previous return value of -1 does mean, that the ID3 chunk was found first
sound_chunk_pos = Find(SoundIdentifier, 0);
if (sound_chunk_pos == -1)
{
throw new CorruptFileException(
"No Sound chunk available in AIFF file.");
}
// Get the length of the Sound chunk and use this as a start value to look for the ID3 chunk
Seek(sound_chunk_pos + 4);
ulong sound_chunk_length = ReadBlock(4).ToULong(true);
long start_search_pos = (long)sound_chunk_length + sound_chunk_pos + 4;
if (id3_chunk_pos == -1)
{
id3_chunk_pos = Find(ID3Identifier, start_search_pos);
}
if (id3_chunk_pos > -1)
{
if (read_tags && tag == null)
{
tag = new Id3v2.Tag(this,
id3_chunk_pos + 8);
}
// Get the length of the tag out of the ID3 chunk
Seek(id3_chunk_pos + 4);
uint tag_size = ReadBlock(4).ToUInt(true) + 8;
tag_start = InvariantStartPosition = id3_chunk_pos;
tag_end = InvariantEndPosition = tag_start + tag_size;
}
}
/// <summary>
/// Reads format specific information at the end of the
/// file.
/// </summary>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <remarks>
/// This method is called by the constructor immediately
/// after the tags at the end of the file have been read
/// and as such (so the internal seek mechanism is close to
/// the end). It should be used for reading any content
/// specific information, such as an audio header from the
/// end of the file.
/// </remarks>
protected virtual void ReadEnd(long end,
ReadStyle propertiesStyle)
{
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="AudioFile" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="TagLib.File.IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public AudioFile(IFileAbstraction abstraction, ReadStyle propertiesStyle)
: base(abstraction, propertiesStyle)
{
}
/// <summary>
/// Reads the file with a specified read style.
/// </summary>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
private void Read(ReadStyle propertiesStyle)
{
// TODO: Support Id3v2 boxes!!!
tag = new CombinedTag();
Mode = AccessMode.Read;
try {
FileParser parser = new FileParser(this);
if (propertiesStyle == ReadStyle.None)
{
parser.ParseTag();
}
else
{
parser.ParseTagAndProperties();
}
InvariantStartPosition = parser.MdatStartPosition;
InvariantEndPosition = parser.MdatEndPosition;
udta_box = parser.UserDataBox;
if (udta_box != null && udta_box.GetChild(BoxType.Meta)
!= null && udta_box.GetChild(BoxType.Meta
).GetChild(BoxType.Ilst) != null)
{
TagTypesOnDisk |= TagTypes.Apple;
}
if (udta_box == null)
{
udta_box = new IsoUserDataBox();
}
apple_tag = new AppleTag(udta_box);
tag.SetTags(apple_tag);
// If we're not reading properties, we're done.
if (propertiesStyle == ReadStyle.None)
{
Mode = AccessMode.Closed;
return;
}
// Get the movie header box.
IsoMovieHeaderBox mvhd_box = parser.MovieHeaderBox;
if (mvhd_box == null)
{
Mode = AccessMode.Closed;
throw new CorruptFileException(
"mvhd box not found.");
}
IsoAudioSampleEntry audio_sample_entry =
parser.AudioSampleEntry;
IsoVisualSampleEntry visual_sample_entry =
parser.VisualSampleEntry;
// Read the properties.
properties = new Properties(mvhd_box.Duration,
audio_sample_entry, visual_sample_entry);
} finally {
Mode = AccessMode.Closed;
}
}
/// <summary>
/// Reads the contents of the current instance determining
/// the size of the riff data, the area the tagging is in,
/// and optionally reading in the tags and media properties.
/// </summary>
/// <param name="read_tags">
/// If <see langword="true" />, any tags found will be read
/// into the current instance.
/// </param>
/// <param name="style">
/// A <see cref="ReadStyle"/> value specifying how the media
/// data is to be read into the current instance.
/// </param>
/// <param name="aiff_size">
/// A <see cref="uint"/> value reference to be filled with
/// the size of the RIFF data as read from the file.
/// </param>
/// <param name="tag_start">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// starts.
/// </param>
/// <param name="tag_end">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// ends.
/// </param>
/// <exception cref="CorruptFileException">
/// The file does not begin with <see cref="FileIdentifier"
/// />.
/// </exception>
private void Read(bool read_tags, ReadStyle style,
out uint aiff_size, out long tag_start,
out long tag_end)
{
Seek(0);
if (ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException(
"File does not begin with AIFF identifier");
}
aiff_size = ReadBlock(4).ToUInt(true);
tag_start = -1;
tag_end = -1;
// Check formType
if (ReadBlock(4) != AIFFFormType)
{
throw new CorruptFileException(
"File form type is not AIFF");
}
long formBlockChunksPosition = Tell;
// Get the properties of the file
if (header_block == null &&
style != ReadStyle.None)
{
long common_chunk_pos = FindChunk(CommIdentifier, formBlockChunksPosition);
if (common_chunk_pos == -1)
{
throw new CorruptFileException(
"No Common chunk available in AIFF file.");
}
Seek(common_chunk_pos);
header_block = ReadBlock((int)StreamHeader.Size);
StreamHeader header = new StreamHeader(header_block, aiff_size);
properties = new Properties(TimeSpan.Zero, header);
}
// Search for the ID3 chunk
long id3_chunk_pos = FindChunk(ID3Identifier, formBlockChunksPosition);
// Search for the sound chunk
long sound_chunk_pos = FindChunk(SoundIdentifier, formBlockChunksPosition);
// Ensure there is a sound chunk for the file to be valid
if (sound_chunk_pos == -1)
{
throw new CorruptFileException(
"No Sound chunk available in AIFF file.");
}
// Get the length of the Sound chunk and use this as a start value to look for the ID3 chunk
Seek(sound_chunk_pos + 4);
// Read the id3 chunk
if (id3_chunk_pos > -1)
{
if (read_tags && tag == null)
{
tag = new Id3v2.Tag(this,
id3_chunk_pos + 8);
}
// Get the length of the tag out of the ID3 chunk
Seek(id3_chunk_pos + 4);
uint tag_size = ReadBlock(4).ToUInt(true) + 8;
tag_start = InvariantStartPosition = id3_chunk_pos;
tag_end = InvariantEndPosition = tag_start + tag_size;
}
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="TagLib.File.IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public File (IFileAbstraction abstraction, ReadStyle propertiesStyle)
: base (abstraction)
{
Read (propertiesStyle);
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="TagLib.File.IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langword="null"
/// />.
/// </exception>
public File(IFileAbstraction abstraction, ReadStyle propertiesStyle)
: base(abstraction)
{
ImageTag = new CombinedImageTag(TagTypes.XMP);
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified path in the local file
/// system and specified read style.
/// </summary>
/// <param name="path">
/// A <see cref="string" /> object containing the path of the
/// file to use in the new instance.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="path" /> is <see langword="null" />.
/// </exception>
public File (string path, ReadStyle propertiesStyle)
: base (path)
{
Read (propertiesStyle);
}
/// <summary>
/// Constructs and initializes a new instance of <see
/// cref="File" /> for a specified file abstraction and
/// specified read style.
/// </summary>
/// <param name="abstraction">
/// A <see cref="IFileAbstraction" /> object to use when
/// reading from and writing to the file.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="abstraction" /> is <see langref="null"
/// />.
/// </exception>
protected File(File.IFileAbstraction abstraction,
ReadStyle propertiesStyle)
: base(abstraction)
{
Read(propertiesStyle);
}
/// <summary>
/// Reads the audio properties from the file represented by
/// the current instance.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value containing the seek position
/// at which the tags end and the media data begins.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <returns>
/// A <see cref="TagLib.Properties" /> object describing the
/// media properties of the file represented by the current
/// instance.
/// </returns>
protected override Properties ReadProperties(long start, long end, ReadStyle propertiesStyle)
{
var header = new StreamHeader(header_block, end - stream_start);
return(new Properties(TimeSpan.Zero, header));
}
/// <summary>
/// Reads format specific information at the start of the
/// file.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value containing the seek position
/// at which the tags end and the media data begins.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <remarks>
/// This method is called by the constructor immediately
/// after the tags at the start of the file have been read
/// and as such (so the internal seek mechanism is close to
/// the start). It should be used for reading any content
/// specific information, such as an audio header from the
/// start of the file.
/// </remarks>
protected virtual void ReadStart(long start,
ReadStyle propertiesStyle)
{
}
public static void WriteStandardPictures(string sample_file, string tmp_file,
ReadStyle readStyle = ReadStyle.Average,
TestTagLevel level = TestTagLevel.Medium)
{
if (System.IO.File.Exists(tmp_file))
{
System.IO.File.Delete(tmp_file);
}
File file = null;
try
{
System.IO.File.Copy(sample_file, tmp_file);
file = File.Create(tmp_file, readStyle);
}
finally { }
Assert.NotNull(file);
var pics = file.Tag.Pictures;
// Raw Picture data references
var raws = new ByteVector[3];
// Insert new picture
Array.Resize(ref pics, 3);
raws[0] = ByteVector.FromPath(sample_picture);
pics[0] = new Picture(sample_picture);
pics[0].Type = PictureType.BackCover;
pics[0].Description = "TEST description 1";
raws[1] = ByteVector.FromPath(sample_other);
pics[1] = new Picture(sample_other);
pics[1].Description = "TEST description 2";
raws[2] = raws[0];
pics[2] = new Picture(sample_picture);
pics[2].Filename = "renamed.gif";
pics[2].Type = PictureType.Other;
pics[2].Description = "TEST description 3";
file.Tag.Pictures = pics;
file.Save();
// Read back the tags
file = File.Create(tmp_file, readStyle);
Assert.NotNull(file);
pics = file.Tag.Pictures;
Assert.AreEqual(3, pics.Length);
// Lazy picture check
var isLazy = (readStyle & ReadStyle.PictureLazy) != 0;
for (int i = 0; i < 3; i++)
{
if (isLazy)
{
Assert.IsTrue(pics[i] is ILazy);
if (pics[i] is ILazy lazy)
{
Assert.IsFalse(lazy.IsLoaded);
}
}
else
{
if (pics[i] is ILazy lazy)
{
Assert.IsTrue(lazy.IsLoaded);
}
}
}
Assert.AreEqual("TEST description 1", pics[0].Description);
Assert.AreEqual("image/gif", pics[0].MimeType);
Assert.AreEqual(73, pics[0].Data.Count);
Assert.AreEqual(raws[0], pics[0].Data);
Assert.AreEqual("TEST description 2", pics[1].Description);
Assert.AreEqual(102400, pics[1].Data.Count);
Assert.AreEqual(raws[1], pics[1].Data);
Assert.AreEqual("TEST description 3", pics[2].Description);
Assert.AreEqual("image/gif", pics[2].MimeType);
Assert.AreEqual(73, pics[2].Data.Count);
Assert.AreEqual(raws[2], pics[2].Data);
// Types and Mime-Types assumed to be properly supported at Medium level test
if (level >= TestTagLevel.Medium)
{
Assert.AreEqual("audio/mp4", pics[1].MimeType);
Assert.AreEqual(PictureType.BackCover, pics[0].Type);
Assert.AreEqual(PictureType.NotAPicture, pics[1].Type);
Assert.AreEqual(PictureType.Other, pics[2].Type);
}
else
{
Assert.AreNotEqual(PictureType.NotAPicture, pics[0].Type);
Assert.AreEqual(PictureType.NotAPicture, pics[1].Type);
Assert.AreNotEqual(PictureType.NotAPicture, pics[2].Type);
}
// Filename assumed to be properly supported at High level test
if (level >= TestTagLevel.High)
{
Assert.AreEqual("apple_tags.m4a", pics[1].Filename);
}
else if (level >= TestTagLevel.Medium)
{
if (pics[1].Filename != null)
{
Assert.AreEqual("apple_tags.m4a", pics[1].Filename);
}
}
}
/// <summary>
/// Reads the contents of the current instance determining
/// the size of the riff data, the area the tagging is in,
/// and optionally reading in the tags and media properties.
/// </summary>
/// <param name="read_tags">
/// If <see langword="true" />, any tags found will be read
/// into the current instance.
/// </param>
/// <param name="style">
/// A <see cref="ReadStyle"/> value specifying how the media
/// data is to be read into the current instance.
/// </param>
/// <param name="riff_size">
/// A <see cref="uint"/> value reference to be filled with
/// the size of the RIFF data as read from the file.
/// </param>
/// <param name="tag_start">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// starts.
/// </param>
/// <param name="tag_end">
/// A <see cref="long" /> value reference to be filled with
/// the absolute seek position at which the tagging data
/// ends.
/// </param>
/// <exception cref="CorruptFileException">
/// The file does not begin with <see cref="FileIdentifier"
/// />.
/// </exception>
private void Read(bool read_tags, ReadStyle style,
out uint riff_size, out long tag_start,
out long tag_end)
{
Seek(0);
if (ReadBlock(4) != FileIdentifier)
{
throw new CorruptFileException(
"File does not begin with RIFF identifier");
}
riff_size = ReadBlock(4).ToUInt(false);
ByteVector stream_format = ReadBlock(4);
tag_start = -1;
tag_end = -1;
long position = 12;
long length = Length;
uint size = 0;
TimeSpan duration = TimeSpan.Zero;
ICodec [] codecs = new ICodec [0];
// Read until there are less than 8 bytes to read.
do
{
bool tag_found = false;
Seek(position);
string fourcc = ReadBlock(4).ToString(StringType.UTF8);
size = ReadBlock(4).ToUInt(false);
switch (fourcc)
{
// "fmt " is used by Wave files to hold the
// WaveFormatEx structure.
case "fmt ":
if (style == ReadStyle.None ||
stream_format != "WAVE")
{
break;
}
Seek(position + 8);
codecs = new ICodec [] {
new WaveFormatEx(ReadBlock(18))
};
break;
// "data" contains the audio data for wave
// files. It's contents represent the invariant
// portion of the file and is used to determine
// the duration of a file. It should always
// appear after "fmt ".
case "data":
if (stream_format != "WAVE")
{
break;
}
InvariantStartPosition = position;
InvariantEndPosition = position + size;
if (style == ReadStyle.None ||
codecs.Length != 1 ||
!(codecs [0] is WaveFormatEx))
{
break;
}
duration += TimeSpan.FromSeconds(
(double)size / (double)
((WaveFormatEx)codecs [0])
.AverageBytesPerSecond);
break;
// Lists are used to store a variety of data
// collections. Read the type and act on it.
case "LIST":
{
switch (ReadBlock(4).ToString(StringType.UTF8))
{
// "hdlr" is used by AVI files to hold
// a media header and BitmapInfoHeader
// and WaveFormatEx structures.
case "hdrl":
if (style == ReadStyle.None ||
stream_format != "AVI ")
{
continue;
}
AviHeaderList header_list =
new AviHeaderList(this,
position + 12,
(int)(size - 4));
duration = header_list.Header.Duration;
codecs = header_list.Codecs;
break;
// "INFO" is a tagging format handled by
// the InfoTag class.
case "INFO":
if (read_tags && info_tag == null)
{
info_tag = new InfoTag(
this,
position + 12,
(int)(size - 4));
}
tag_found = true;
break;
// "MID " is a tagging format handled by
// the MovieIdTag class.
case "MID ":
if (read_tags && mid_tag == null)
{
mid_tag = new MovieIdTag(
this,
position + 12,
(int)(size - 4));
}
tag_found = true;
break;
// "movi" contains the media data for
// and AVI and its contents represent
// the invariant portion of the file.
case "movi":
if (stream_format != "AVI ")
{
break;
}
InvariantStartPosition = position;
InvariantEndPosition = position + size;
break;
}
break;
}
// "ID32" is a custom box for this format that
// contains an ID3v2 tag.
case "ID32":
if (read_tags && id32_tag == null)
{
id32_tag = new Id3v2.Tag(this,
position + 8);
}
tag_found = true;
break;
// "IDVX" is used by DivX and holds an ID3v1-
// style tag.
case "IDVX":
if (read_tags && divx_tag == null)
{
divx_tag = new DivXTag(this,
position + 8);
}
tag_found = true;
break;
// "JUNK" is a padding element that could be
// associated with tag data.
case "JUNK":
if (tag_end == position)
{
tag_end = position + 8 + size;
}
break;
}
// Determine the region of the file that
// contains tags.
if (tag_found)
{
if (tag_start == -1)
{
tag_start = position;
tag_end = position + 8 + size;
}
else if (tag_end == position)
{
tag_end = position + 8 + size;
}
}
// Move to the next item.
} while ((position += 8 + size) + 8 < length);
// If we're reading properties, and one were found,
// throw an exception. Otherwise, create the Properties
// object.
if (style != ReadStyle.None)
{
if (codecs.Length == 0)
{
throw new UnsupportedFormatException(
"Unsupported RIFF type.");
}
properties = new Properties(duration, codecs);
}
// If we're reading tags, update the combined tag.
if (read_tags)
{
tag.SetTags(id32_tag, info_tag, mid_tag, divx_tag);
}
}
/// <summary>
/// Reads the audio properties from the file represented by
/// the current instance.
/// </summary>
/// <param name="start">
/// A <see cref="long" /> value containing the seek position
/// at which the tags end and the media data begins.
/// </param>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
/// <returns>
/// A <see cref="TagLib.Properties" /> object describing the
/// media properties of the file represented by the current
/// instance.
/// </returns>
protected override Properties ReadProperties (long start,
long end,
ReadStyle propertiesStyle)
{
TimeSpan duration = start_time == null ?
TimeSpan.Zero : TimeSpan.FromSeconds (
end_time - (double) start_time);
return new Properties (duration, video_header,
audio_header);
}
/// <summary>
/// Reads format specific information at the end of the
/// file.
/// </summary>
/// <param name="end">
/// A <see cref="long" /> value containing the seek position
/// at which the media data ends and the tags begin.
/// </param>
/// <param name="propertiesStyle">
/// A <see cref="ReadStyle" /> value specifying at what level
/// of accuracy to read the media properties, or <see
/// cref="ReadStyle.None" /> to ignore the properties.
/// </param>
protected override void ReadEnd(long end,
ReadStyle propertiesStyle)
{
tag = new CombinedTag(metadata, base.Tag);
GetTag(TagTypes.Xiph, true);
}