private static void DumpHuffmanTable(DefineHuffmanTable huffmanTable)
{
Console.WriteLine("HuffmanTable {0}, {1}", huffmanTable.Length, huffmanTable.Tables.Count);
foreach (var value in huffmanTable.Tables.Values)
{
Console.WriteLine(" Table {0}, {1}", value.Index, value.Dictionary.Count);
}
}
public void Count()
{
using (var memory = new MemoryStream(Data))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
Assert.AreEqual(2, huffmanTable.Tables.Count);
}
}
public void Mark()
{
using (var memory = new MemoryStream(Data))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
Assert.AreEqual(0xFF, huffmanTable.Mark);
}
}
public void DataB2()
{
using (var memory = new MemoryStream(Data))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
var expected = new byte[] { 0x06, 0x04, 0x08, 0x05, 0x07, 0x03, 0x09, 0x00, 0x0A, 0x02, 0x01, 0x0C, 0x0B, 0x0D, 0x0E };
CollectionAssert.AreEqual(expected, huffmanTable.Tables.Skip(1).Single().Value.Data2);
}
}
public void DataA1()
{
using (var memory = new MemoryStream(Data))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
var expected = new byte[] { 0x00, 0x01, 0x04, 0x02, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
CollectionAssert.AreEqual(expected, huffmanTable.Tables.First().Value.Data1);
}
}
public void BadTag()
{
var badData = new byte[] { 0xFF, 0x00 };
using (var memory = new MemoryStream(badData))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
}
}
public void ShortLengthA()
{
var badData = new byte[] { 0xFF, 0xC4, 0x00, 0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
using (var memory = new MemoryStream(badData))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
}
}
/// <summary>
/// Writes to the specified stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="image">The image.</param>
/// <returns>
/// True if it writes successfully, false otherwise.
/// </returns>
public override bool Write(BinaryWriter stream, Image image)
{
new StartOfImage().Write(stream);
var QuantizationTableSegment = new DefineQuantizationTable(90);
QuantizationTableSegment.Write(stream);
new StartOfFrame(image).Write(stream);
var HuffmanTableSegment = new DefineHuffmanTable(null);
HuffmanTableSegment.Write(stream);
new StartOfScan(image, HuffmanTableSegment, QuantizationTableSegment).Write(stream);
new EndOfImage(null).Write(stream);
return(true);
}
public void LongLengthB()
{
var badData = new byte[]
{
0xFF, 0xC4, 0x00, 0x38, 0x00, 0x12, 0x11, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06,
0x03, 0x09, 0x07
};
using (var memory = new MemoryStream(badData))
using (var reader = new BinaryReader(memory))
{
var huffmanTable = new DefineHuffmanTable(reader);
}
}
public void DumpHuffmanTable()
{
const string directory = @"..\..\..\Samples\";
const string fileName2 = directory + "huff_simple0.jpg";
using (var fileStream = File.Open(fileName2, FileMode.Open, FileAccess.Read))
using (var binaryReader = new BinaryReader(fileStream))
{
binaryReader.BaseStream.Seek(0x000000D0u, SeekOrigin.Begin);
var huffmanTable = new DefineHuffmanTable(binaryReader);
Assert.AreEqual(0xFF, huffmanTable.Mark);
Assert.AreEqual(0xC4, huffmanTable.Tag);
Console.WriteLine(huffmanTable);
}
}
