List <CDirectoryEntry> ReadDes(BinaryReader br)
{
List <CDirectoryEntry> des = new List <CDirectoryEntry>();
short count = br.ReadInt16();
for (int i = 0; i < count; i++)
{
CDirectoryEntry de = new CDirectoryEntry();
de.Tag = br.ReadInt16();
short type = br.ReadInt16();
de.Type = (CDirectoryEntry.Types)type;
de.Count = br.ReadInt32();
de.ValueOffset = br.ReadInt32();
des.Add(de);
System.Diagnostics.Trace.WriteLine(de);
}
return(des);
}
public bool Open(Stream stream)
{
this.DirectoryEntrys.Clear();
long start_pos = stream.Position;
BinaryReader br = new BinaryReader(stream);
byte[] bb = br.ReadBytes(2);
short ss = br.ReadInt16();
int offset = br.ReadInt32();
br.BaseStream.Seek(start_pos + offset, SeekOrigin.Begin);
while (true)
{
List <CDirectoryEntry> des = this.ReadDes(br);
this.DirectoryEntrys.AddRange(des);
CDirectoryEntry exifusb = des.FirstOrDefault(x => x.Tag == -30871);
if (exifusb != null)
{
long oldpos = br.BaseStream.Position;
br.BaseStream.Position = start_pos + exifusb.ValueOffset;
des = this.ReadDes(br);
CDirectoryEntry exposure_time = des.FirstOrDefault(x => x.Tag == -32102);
br.BaseStream.Position = start_pos + exposure_time.ValueOffset;
int a = br.ReadInt32();
int b = br.ReadInt32();
this.DirectoryEntrys.AddRange(des);
br.BaseStream.Position = oldpos;
}
offset = br.ReadInt32();
if (offset == 0)
{
break;
}
br.BaseStream.Position = start_pos + offset;
}
br.Close();
return(true);
}