LZMA C# SDK 子线程压缩与解压缩 Unity3d实例

参考雨松的LZMA SDK使用方法：
http://www.xuanyusong.com/archives/3095 转自http://blog.csdn.net/huutu http://www.thisisgame.com.cn
计划在项目中使用 不压缩的Assetbundle ，所以需要对Assetbundle 进行手动压缩打包，因为之前有对 十万个冷笑话的打包分析，所以这次坚定选择 LZMA压缩算法来压缩Assetbundle。

转自http://blog.csdn.net/huutu http://www.thisisgame.com.cn
Note：

因为暂时不知道LZMA如何压缩与解压文件夹，所以目前是计划对文件夹进行UPK打包成UPK文件，然后LZMA压缩。解压的话先解压出来UPK文件，然后读取UPK文件来释放出源文件。

LZMA 官网下载SDK
http://www.7-zip.org/sdk.html
下载过来后直接把C#里面的7zip拖到Unity中，这时Setting.cs 会报错，删除它。

Note：

本文示例中的 LZMA SDK源代码被我修改了。

转自http://blog.csdn.net/huutu http://www.thisisgame.com.cn
代码如下：

using UnityEngine;
using System.Collections;
using SevenZip;
using System.IO;
using UnityEditor;
using System;
using System.Threading;
using UnityEngine.UI;

public class NewBehaviourScript : MonoBehaviour {

[SerializeField]
Slider m_Slider;

CodeProgress m_CodeProgress=null;//进度;

Thread m_CompressThread=null; //压缩线程;
Thread m_DecompressThread=null; //解压缩线程;

string ApplicationdataPath=string.Empty;

private float m_Percent=0f;

// Use this for initialization
void Start ()
{
ApplicationdataPath=Application.dataPath;

m_CodeProgress=new CodeProgress(SetProgressPercent);
}

void Update()
{
if(m_Percent>0f)
{
m_Slider.value=m_Percent;
if(m_Percent==1f)
{
Debug.Log("m_Percent==1f");
m_Percent=0f;
AssetDatabase.Refresh();
}
}
}

void OnGUI()
{
if(GUI.Button(new Rect(100,100,100,100),"Compress"))
{
m_Slider.value=0f;
m_CompressThread=new Thread(new ThreadStart(TestCompress));
m_CompressThread.Start();
}

if(GUI.Button(new Rect(300,100,100,100),"DeCompress"))
{
m_Slider.value=0f;
m_DecompressThread=new Thread(new ThreadStart(TestDeCompress));
m_DecompressThread.Start();
}
}

void TestCompress()
{
try
{
Compress(ApplicationdataPath+"/lib.UPK",ApplicationdataPath+"/lib.ZUPK");
}
catch(Exception ex)
{
Debug.Log(ex);
}
}

void TestDeCompress()
{
try
{
DeCompress(ApplicationdataPath+"/lib.ZUPK",ApplicationdataPath+"/lib1.UPK");
}
catch(Exception ex)
{
Debug.Log(ex);
}
}

void SetProgressPercent(Int64 fileSize,Int64 processSize)
{
m_Percent=(float)processSize/fileSize;
}

void Compress(string inpath,string outpath)
{
SevenZip.Compression.LZMA.Encoder encoder=new SevenZip.Compression.LZMA.Encoder();
FileStream inputFS=new FileStream(inpath,FileMode.Open);
FileStream outputFS=new FileStream(outpath,FileMode.Create);

encoder.WriteCoderProperties(outputFS);

outputFS.Write(System.BitConverter.GetBytes(inputFS.Length),0,8);

encoder.Code(inputFS,outputFS,inputFS.Length,-1,m_CodeProgress);
outputFS.Flush();
outputFS.Close();
inputFS.Close();
}

void DeCompress(string inpath,string outpath)
{
SevenZip.Compression.LZMA.Decoder decoder=new SevenZip.Compression.LZMA.Decoder();
FileStream inputFS=new FileStream(inpath,FileMode.Open);
FileStream outputFS=new FileStream(outpath,FileMode.Create);

int propertiesSize=SevenZip.Compression.LZMA.Encoder.kPropSize;
byte[] properties=new byte[propertiesSize];
inputFS.Read(properties,0,properties.Length);

byte[] fileLengthBytes=new byte[8];
inputFS.Read(fileLengthBytes,0,8);
long fileLength=System.BitConverter.ToInt64(fileLengthBytes,0);

decoder.SetDecoderProperties(properties);
decoder.Code(inputFS,outputFS,inputFS.Length,fileLength,m_CodeProgress);
outputFS.Flush();
outputFS.Close();
inputFS.Close();
}

}

class CodeProgress:ICodeProgress
{
public delegate void ProgressDelegate(Int64 fileSize,Int64 processSize);

public ProgressDelegate m_ProgressDelegate=null;

public CodeProgress(ProgressDelegate del)
{
m_ProgressDelegate=del;
}

public void SetProgress(Int64 inSize, Int64 outSize)
{

}

public void SetProgressPercent(Int64 fileSize,Int64 processSize)
{
m_ProgressDelegate(fileSize,processSize);
}
}
转自http://blog.csdn.net/huutu http://www.thisisgame.com.cn 示例工程下载：

百度网盘

链接: http://pan.baidu.com/s/1jGlEDPO 密码: wure

CSDN下载

关于UPK打包

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