//http://id3.org/id3v2.4.0-structure
private void Parse4(Stream stream)
{
HeaderLength = ID3Utils.ReadInt32(stream, false);
byte[] flags = ID3Utils.Read(stream, 1);
Flags = (ID3v2ExtendedHeaderFlags)flags[0];
if ((Flags & ID3v2ExtendedHeaderFlags.CrcPresent) == ID3v2ExtendedHeaderFlags.CrcPresent)
{
CRC = ID3Utils.Read(stream, 5);
}
if ((Flags & ID3v2ExtendedHeaderFlags.Restrict) == ID3v2ExtendedHeaderFlags.Restrict)
{
//%ppqrrstt
TagSizeRestriction = (ID3v2TagSizeRestriction)(flags[0] & 0xC0); //p --> last 2 bit
TextEncodingRestriction = (ID3v2TextEncodingRestriction)(flags[0] & 0x20); //q
TextFieldSizeRestriction = (ID3v2TextFieldSizeRestriction)(flags[0] & 0x18); //r
ImageEncodingRestriction = (ID3v2ImageEncodingRestriction)(flags[0] & 0x4); //s
ImageSizeRestriction = (ID3v2ImageSizeRestriction)(flags[0] & 0x3); //t
}
if ((flags[0] & 0x8F) != 0)
{
throw new ID3Exception("Invalid Extendedheaderflags");
}
}
public Frame GetFrame(FrameHeader header, ID3Version version, Stream stream)
{
var frame = GetFrame(header.FrameID, version, header);
frame.DecodeContent(ID3Utils.Read(stream, header.FrameSize));
return(frame);
}
private void Parse2(Stream stream)
{
byte[] buffer = ID3Utils.Read(stream, 6);
FrameID = ID3Utils.ReadString(buffer, 0, 3, ID3Utils.Iso88591);
FrameSize = ID3Utils.ReadInt32(buffer, 3, false, 3);
//Flags not supported
Flags = FrameFlags.None;
}
private void Parse4(Stream stream)
{
byte[] buffer = ID3Utils.Read(stream, 10);
FrameID = ID3Utils.ReadString(buffer, 0, 4, ID3Utils.Iso88591);
FrameSize = ID3Utils.ReadInt32(buffer, 4, true, 4);
byte[] flags = new byte[] { buffer[8], buffer[9] };
//%0abc0000 Framestatusflags
if ((flags[0] & 0x40) == 0)
{
Flags |= FrameFlags.PreserveTagAltered;
}
if ((flags[0] & 0x20) == 0)
{
Flags |= FrameFlags.PreserveFileAltered;
}
if ((flags[0] & 0x10) != 0)
{
Flags |= FrameFlags.ReadOnly;
}
//%0h00kmnp Frameformatflags
if ((flags[1] & 0x40) != 0)
{
Flags |= FrameFlags.GroupIdentified;
GroupIdentifier = ID3Utils.Read(stream, 1)[0];
FrameSize -= 1;
}
if ((flags[1] & 0x8) != 0)
{
Flags |= FrameFlags.Compressed;
}
if ((flags[1] & 0x4) != 0)
{
Flags |= FrameFlags.Encrypted;
_encryptionMethod = ID3Utils.Read(stream, 1)[0];
FrameSize -= 1;
}
if ((flags[1] & 0x2) != 0)
{
Flags |= FrameFlags.UnsyncApplied; //todo: tag allgemein benachrichtigen?
}
if ((flags[1] & 0x1) != 0)
{
Flags |= FrameFlags.DataLengthIndicatorPresent;
_dataLengthIndicator = ID3Utils.ReadInt32(stream, true);
FrameSize -= 4;
}
}
private void Parse3(Stream stream)
{
HeaderLength = ID3Utils.ReadInt32(stream, false);
byte[] flags = ID3Utils.Read(stream, 2);
PaddingSize = ID3Utils.ReadInt32(stream, false);
if ((flags[0] & 0x7F) != 0 || flags[1] != 0)
{
throw new ID3Exception("Invalid ExtendedHeaderflags");
}
//Flags = (ID3v2ExtendedHeaderFlags)flags[0];
if ((flags[0] & 0x80) != 0)
{
Flags |= ID3v2ExtendedHeaderFlags.CrcPresent;
CRC = ID3Utils.Read(stream, 4);
}
}
private void Parse3(Stream stream)
{
byte[] buffer = ID3Utils.Read(stream, 10);
FrameID = ID3Utils.ReadString(buffer, 0, 4, ID3Utils.Iso88591);
FrameSize = ID3Utils.ReadInt32(buffer, 4, false, 4);
byte[] flags = new byte[] { buffer[8], buffer[9] };
//%abc00000
if ((flags[0] & 0x80) == 0)
{
Flags |= FrameFlags.PreserveTagAltered;
}
if ((flags[0] & 0x40) == 0)
{
Flags |= FrameFlags.PreserveFileAltered;
}
if ((flags[0] & 0x20) != 0)
{
Flags |= FrameFlags.ReadOnly;
}
//%ijk00000
if ((flags[1] & 0x80) != 0)
{
Flags |= FrameFlags.Compressed;
_uncompressedSize = ID3Utils.ReadInt32(stream, false);
FrameSize -= 4;
}
if ((flags[1] & 0x40) != 0)
{
Flags |= FrameFlags.Encrypted;
_encryptionMethod = ID3Utils.Read(stream, 1)[0];
FrameSize -= 1;
}
if ((flags[1] & 0x20) != 0)
{
Flags |= FrameFlags.GroupIdentified;
GroupIdentifier = ID3Utils.Read(stream, 1)[0];
FrameSize -= 1;
}
}