public Collection <IExifValue> Read(byte[] data)
{
var result = new Collection <IExifValue>();
if (data == null || data.Length == 0)
{
return(result);
}
_reader = new EndianReader(data);
if (_reader.ReadString(4) == "Exif")
{
if (_reader.ReadShortMSB() != 0)
{
return(result);
}
_startIndex = 6;
}
_isLittleEndian = _reader.ReadString(2) == "II";
if (ReadShort() != 0x002A)
{
return(result);
}
var ifdOffset = ReadLong();
AddValues(result, ifdOffset);
var thumbnailOffset = ReadLong();
ReadThumbnail(thumbnailOffset);
if (_exifOffset != 0)
{
AddValues(result, _exifOffset);
}
if (_gpsOffset != 0)
{
AddValues(result, _gpsOffset);
}
return(result);
}
public void Read(byte[] data)
{
Values.Clear();
InvalidTags.Clear();
if (data == null || data.Length == 0)
{
return;
}
_reader = new EndianReader(data);
if (_reader.ReadString(4) == "Exif")
{
if (_reader.ReadShortMSB() != 0)
{
return;
}
_startIndex = 6;
}
_isLittleEndian = _reader.ReadString(2) == "II";
if (ReadShort() != 0x002A)
{
return;
}
var ifdOffset = ReadLong();
AddValues(Values, ifdOffset);
var thumbnailOffset = ReadLong();
ReadThumbnail(thumbnailOffset);
if (_exifOffset != 0)
{
AddValues(Values, _exifOffset);
}
if (_gpsOffset != 0)
{
AddValues(Values, _gpsOffset);
}
}
private ushort ReadShort() => (_isLittleEndian ? _reader.ReadShortLSB() : _reader.ReadShortMSB()) ?? 0;