75 lines
2.5 KiB
C#
75 lines
2.5 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace libncmdump_demo_cli
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{
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/// <summary>
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/// NeteaseCrypt C# Wrapper
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/// </summary>
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class NeteaseCrypt
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{
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const string DLL_PATH = "libncmdump.dll";
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[DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
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private static extern IntPtr CreateNeteaseCrypt(IntPtr path);
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[DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
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private static extern int Dump(IntPtr NeteaseCrypt, IntPtr outputPath);
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[DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
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private static extern void FixMetadata(IntPtr NeteaseCrypt);
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[DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
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private static extern void DestroyNeteaseCrypt(IntPtr NeteaseCrypt);
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private IntPtr NeteaseCryptClass = IntPtr.Zero;
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/// <summary>
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/// 创建 NeteaseCrypt 类的实例。
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/// </summary>
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/// <param name="FileName">网易云音乐 ncm 加密文件路径</param>
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public NeteaseCrypt(string FileName)
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{
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byte[] bytes = Encoding.UTF8.GetBytes(FileName);
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IntPtr inputPtr = Marshal.AllocHGlobal(bytes.Length + 1);
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Marshal.Copy(bytes, 0, inputPtr, bytes.Length);
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Marshal.WriteByte(inputPtr, bytes.Length, 0);
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NeteaseCryptClass = CreateNeteaseCrypt(inputPtr);
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}
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/// <summary>
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/// 启动转换过程。
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/// </summary>
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/// <param name="OutputPath">指定一个路径输出，如果为空，则输出到原路径</param>
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/// <returns>返回一个整数，指示转储过程的结果。如果成功，返回0；如果失败，返回1。</returns>
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public int Dump(string OutputPath)
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{
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byte[] bytes = Encoding.UTF8.GetBytes(OutputPath);
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IntPtr outputPtr = Marshal.AllocHGlobal(bytes.Length + 1);
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Marshal.Copy(bytes, 0, outputPtr, bytes.Length);
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Marshal.WriteByte(outputPtr, bytes.Length, 0);
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return Dump(NeteaseCryptClass, outputPtr);
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}
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/// <summary>
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/// 修复音乐文件元数据。
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/// </summary>
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public void FixMetadata()
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{
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FixMetadata(NeteaseCryptClass);
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}
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/// <summary>
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/// 销毁 NeteaseCrypt 类的实例。
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/// </summary>
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public void Destroy()
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{
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DestroyNeteaseCrypt(NeteaseCryptClass);
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}
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}
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}
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