public void DecompressBitStreamWithNoMarkerStart()
{
var compressed = new byte[] { 0x33, 0x33 };
var exception = Assert.Throws <InvalidDataException>(() => JpegLSCodec.Decompress(compressed));
Assert.AreEqual(JpegLSError.MissingJpegMarkerStart, exception.Data["JpegLSError"]);
}
public void DecodeBitStreamWithUnsupportedEncoding()
{
var compressed = new byte[]
{
0xFF, 0xD8, // Start Of Image (JPEG_SOI)
0xFF, 0xC3, // Start Of Frame (lossless, huffman) (JPEG_SOF_3)
0x00, 0x00 // Lenght of data of the marker
};
var exception = Assert.Throws <InvalidDataException>(() => JpegLSCodec.Decompress(compressed));
Assert.AreEqual(JpegLSError.UnsupportedEncoding, exception.Data["JpegLSError"]);
}
public void TestDecodeBitStreamWithUnknownJpegMarker()
{
var compressed = new byte[]
{
0xFF, 0xD8, // Start Of Image (JPEG_SOI)
0xFF, 0x01, // Undefined marker
0x00, 0x00 // Lenght of data of the marker
};
var exception = Assert.Throws <InvalidDataException>(() => JpegLSCodec.Decompress(compressed));
Assert.AreEqual(JpegLSError.UnknownJpegMarker, exception.Data["JpegLSError"]);
}
public void CompressOneByOneBlackAndWhite()
{
var info = new JpegLSMetadataInfo(1, 1, 1, 1);
var uncompressedOriginal = new byte[] { 1 };
var compressedSegment = JpegLSCodec.Compress(info, uncompressedOriginal);
var compressed = new byte[compressedSegment.Count];
Array.Copy(compressedSegment.Array, compressed, compressed.Length);
var uncompressed = JpegLSCodec.Decompress(compressed);
Assert.AreEqual(info.UncompressedSize, uncompressed.Length);
Assert.AreEqual(uncompressedOriginal, uncompressed);
}
public void Decompress()
{
var source = ReadAllBytes("T8C0E0.JLS");
var expected = ReadAllBytes("TEST8.PPM", 15);
var uncompressed = JpegLSCodec.Decompress(source);
var info = JpegLSCodec.GetMetadataInfo(source);
if (info.InterleaveMode == JpegLSInterleaveMode.None && info.ComponentCount == 3)
{
expected = TripletToPlanar(expected, info.Width, info.Height);
}
Assert.AreEqual(expected, uncompressed);
}
public void Compress()
{
var info = new JpegLSMetadataInfo(256, 256, 8, 3);
var uncompressedOriginal = ReadAllBytes("TEST8.PPM", 15);
uncompressedOriginal = TripletToPlanar(uncompressedOriginal, info.Width, info.Height);
var compressedSegment = JpegLSCodec.Compress(info, uncompressedOriginal);
var compressed = new byte[compressedSegment.Count];
Array.Copy(compressedSegment.Array, compressed, compressed.Length);
var compressedInfo = JpegLSCodec.GetMetadataInfo(compressed);
Assert.AreEqual(info, compressedInfo);
var uncompressed = JpegLSCodec.Decompress(compressed);
Assert.AreEqual(info.UncompressedSize, uncompressed.Length);
Assert.AreEqual(uncompressedOriginal, uncompressed);
}