static void test1(string[] args)
{
ProbaFrame gen = new ProbaFrame(100000000, 0.1);
Stream test_frame = gen.generate();
gen.WriteFile("../../test_frame3.txt");
//Stream test_frame = new FileStream("../../test_frame2.txt", FileMode.Open, FileAccess.Read);
MemoryStream temp = new MemoryStream(5);
using (CoreDumpDeltaWriter <Deflate_Encoder, Deflate_Decoder> test = new CoreDumpDeltaWriter <Deflate_Encoder, Deflate_Decoder>())
{
test.Coder = new Deflate_Encoder();
CoderPropID[] propIDs =
{
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker,
};
Int32 dictionary = 1 << 23;
Int32 posStateBits = 2;
Int32 litContextBits = 0; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 2;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 1;
Int32 numFastBytes = 128;
string mf = "bt4";//match finder
bool eos = true;
object[] properties =
{
(Int32)(dictionary),
(Int32)(posStateBits),
(Int32)(litContextBits),
(Int32)(litPosBits),
(Int32)(algorithm),
(Int32)(numFastBytes),
mf,
eos,
};
//test.Coder.SetCoderProperties(propIDs, properties);
File.Delete("../../test_3.LZMA");
test.OpenNewFile("../../test_3.LZMA");
Console.WriteLine("frame de taille : " + test_frame.Length);
Stopwatch sw = new Stopwatch();
for (int i = 0; i < n_frame; i++)
{
Console.WriteLine("frame " + i.ToString());
test_frame.Seek(0, SeekOrigin.Begin);
sw.Start();
test.AddFrame(test_frame);
sw.Stop();
Console.WriteLine("frame " + i.ToString() + " fait en " + sw.Elapsed);
sw.Reset();
}
System.Console.WriteLine("fini");
test.FinishTree();
//test.Coder.WriteCoderProperties(temp);
}
CoreDumpDeltaWriter <Deflate_Encoder, Deflate_Decoder> test2 = new CoreDumpDeltaWriter <Deflate_Encoder, Deflate_Decoder>();
test2.readOnlyOpen("../../test_3.LZMA");
test2.Decoder = new Deflate_Decoder();
//test2.Decoder.SetDecoderProperties(temp.ToArray());
test_retrieve(0, test_frame, test2);
test_retrieve(1, test_frame, test2);
test_retrieve(53, test_frame, test2);
test_retrieve(260, test_frame, test2);
test_retrieve(136, test_frame, test2);
test_retrieve(n_frame - 1, test_frame, test2);
rand_test(100, n_frame, test_frame, test2);
while (!Console.KeyAvailable)
{
;
}
}
/*
*
* -a{N}: set compression mode 0 = fast, 1 = normal
* default: 1 (normal)
*
* d{N}: Sets Dictionary size - [0, 30], default: 23 (8MB)
* The maximum value for dictionary size is 1 GB = 2^30 bytes.
* Dictionary size is calculated as DictionarySize = 2^N bytes.
* For decompressing file compressed by LZMA method with dictionary
* size D = 2^N you need about D bytes of memory (RAM).
*
* -fb{N}: set number of fast bytes - [5, 273], default: 128
* Usually big number gives a little bit better compression ratio
* and slower compression process.
*
* -lc{N}: set number of literal context bits - [0, 8], default: 3
* Sometimes lc=4 gives gain for big files.
*
* -lp{N}: set number of literal pos bits - [0, 4], default: 0
* lp switch is intended for periodical data when period is
* equal 2^N. For example, for 32-bit (4 bytes)
* periodical data you can use lp=2. Often it's better to set lc0,
* if you change lp switch.
*
* -pb{N}: set number of pos bits - [0, 4], default: 2
* pb switch is intended for periodical data
* when period is equal 2^N.
*
* -mf{MF_ID}: set Match Finder. Default: bt4.
* Algorithms from hc* group doesn't provide good compression
* ratio, but they often works pretty fast in combination with
* fast mode (-a0).
*
* Memory requirements depend from dictionary size
* (parameter "d" in table below).
*
* MF_ID Memory Description
*
* bt2 d * 9.5 + 4MB Binary Tree with 2 bytes hashing.
* bt3 d * 11.5 + 4MB Binary Tree with 3 bytes hashing.
* bt4 d * 11.5 + 4MB Binary Tree with 4 bytes hashing.
* hc4 d * 7.5 + 4MB Hash Chain with 4 bytes hashing.
*
* -eos: write End Of Stream marker. By default LZMA doesn't write
* eos marker, since LZMA decoder knows uncompressed size
* stored in .lzma file header.
*
* -si: Read data from stdin (it will write End Of Stream marker).
* -so: Write data to stdout
*
*
*
* */
static void generate_file(string file_name, int n_frame, int frame_size)
{
ProbaFrame gen = new ProbaFrame(frame_size, 0.1);
Stream test_frame = gen.generate();
using (CoreDumpDeltaWriter <Deflate_Encoder, Deflate_Decoder> test = new CoreDumpDeltaWriter <Deflate_Encoder, Deflate_Decoder>())
{
test.Coder = new Deflate_Encoder();
CoderPropID[] propIDs =
{
CoderPropID.DictionarySize,
CoderPropID.PosStateBits,
CoderPropID.LitContextBits,
CoderPropID.LitPosBits,
CoderPropID.Algorithm,
CoderPropID.NumFastBytes,
CoderPropID.MatchFinder,
CoderPropID.EndMarker,
};
Int32 dictionary = 1 << 23;
Int32 posStateBits = 2;
Int32 litContextBits = 0; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 2;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 1;
Int32 numFastBytes = 128;
string mf = "bt4";//match finder
bool eos = true;
object[] properties =
{
(Int32)(dictionary),
(Int32)(posStateBits),
(Int32)(litContextBits),
(Int32)(litPosBits),
(Int32)(algorithm),
(Int32)(numFastBytes),
mf,
eos,
};
//test.Coder.SetCoderProperties(propIDs, properties);
File.Delete(file_name);
test.OpenNewFile(file_name);
Console.WriteLine("frame de taille : " + test_frame.Length);
Stopwatch sw = new Stopwatch();
for (int i = 0; i < n_frame; i++)
{
Console.WriteLine("frame " + i.ToString());
test_frame.Seek(0, SeekOrigin.Begin);
sw.Start();
test.AddFrame(test_frame);
sw.Stop();
Console.WriteLine("frame " + i.ToString() + " fait en " + sw.Elapsed);
sw.Reset();
}
System.Console.WriteLine("fini");
test.FinishTree();
//test.Coder.WriteCoderProperties(temp);
}
}
