public void Parse(Stream stream)
{
uint b = 0;
int rem = 0;
byte c = (byte)StreamUtil.GetBit(stream, ref rem, ref b, 1);
if (c != 0)
{
int scale_bits = (int)StreamUtil.GetBit(stream, ref rem, ref b, 5);
scale_x = (short)StreamUtil.GetBit(stream, ref rem, ref b, scale_bits);
scale_y = (short)StreamUtil.GetBit(stream, ref rem, ref b, scale_bits);
}
c = (byte)StreamUtil.GetBit(stream, ref rem, ref b, 1);
if (c != 0)
{
int rotate_bits = (int)StreamUtil.GetBit(stream, ref rem, ref b, 5);
rotate_skew0 = (short)StreamUtil.GetBit(stream, ref rem, ref b, rotate_bits);
rotate_skew1 = (short)StreamUtil.GetBit(stream, ref rem, ref b, rotate_bits);
}
int translate_bits = (int)StreamUtil.GetBit(stream, ref rem, ref b, 5);
translate_x = (short)StreamUtil.GetBit(stream, ref rem, ref b, translate_bits);
translate_y = (short)StreamUtil.GetBit(stream, ref rem, ref b, translate_bits);
}
public void SaveJPG(string dir)
{
if (!dir.EndsWith("\\"))
{
dir += "\\";
}
Directory.CreateDirectory(dir);
int count = 1;
byte[] jpeg_tables = null;
for (int i = 0; i < tag_list_.Count; ++i)
{
if ((int)tag_list_[i].tag == (int)ObjectType.DefineBitsJPEG || (int)tag_list_[i].tag == (int)ObjectType.DefineBitsJPEG2 ||
(int)tag_list_[i].tag == (int)ObjectType.DefineBitsJPEG3)
{
FileStream fs = null;
try
{
fs = new FileStream(dir + count.ToString("0000") + ".jpg", FileMode.Create, FileAccess.Write);
if ((int)tag_list_[i].tag == (int)ObjectType.DefineBitsJPEG3)
{
// 最初の2バイトはタグなので無視
data_reader_.BaseStream.Seek(tag_list_[i].position + 2, SeekOrigin.Begin);
int image_data_size = data_reader_.ReadInt32();
StreamUtil.Copy(data_stream_, fs, image_data_size);
}
else
{
const int header_size = 20;
byte[] pre_search = new byte[6];
data_stream_.Seek(tag_list_[i].position, SeekOrigin.Begin);
data_stream_.Read(pre_search, 0, pre_search.Length);
int offset = 2;
if (pre_search[3] == 0xD9 && pre_search[5] == 0xD8)
{
offset += 4;
}
data_stream_.Seek(tag_list_[i].position + offset, SeekOrigin.Begin);
StreamUtil.Copy(data_stream_, fs, header_size);
if (tag_list_[i].tag == 6 && jpeg_tables != null)
{
fs.Write(jpeg_tables, 2, jpeg_tables.Length - 4); // 最初と最後2バイトずつは除く
}
StreamUtil.Copy(data_stream_, fs, (int)tag_list_[i].size - header_size - offset);
}
++count;
}
finally
{
if (fs != null)
{
fs.Close();
}
}
}
else if ((int)tag_list_[i].tag == (int)ObjectType.JPEGTables)
{
jpeg_tables = new byte[tag_list_[i].size];
data_stream_.Seek(tag_list_[i].position, SeekOrigin.Begin);
data_stream_.Read(jpeg_tables, 0, (int)tag_list_[i].size);
}
}
}