android build

CMakeLists.txt

@@ -1,6 +1,6 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.14)
 
-project(ncmdump LANGUAGES CXX)
+project("ncmdump")
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -10,10 +10,6 @@ set(WITH_ZLIB OFF)
 set(BUILD_TESTING OFF)
 add_subdirectory(taglib)
 
-if(MSVC)
-  add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/execution-charset:utf-8>")
-endif()
-
 FILE(GLOB COMMON_HEADERS src/include/*.h)
 FILE(GLOB COMMON_SOURCES src/ncmcrypt.cpp src/utils/*.cpp)
 FILE(GLOB EXECUTABLE_SOURCES src/main.cpp)
@@ -21,66 +17,20 @@ FILE(GLOB LIBRARY_HEADERS src/lib/libncmdump.h)
 FILE(GLOB LIBRARY_SOURCES src/lib/*.cpp)
 FILE(GLOB WIN_SOURCES src/platform/win32_init.cpp)
 
-if(WIN32)
+add_library(ncmdump_lib SHARED
-  add_executable(ncmdump_exec
+  ${COMMON_HEADERS}
-    ${COMMON_HEADERS}
+  ${COMMON_SOURCES}
-    ${COMMON_SOURCES}
+  ${LIBRARY_HEADERS}
-    ${EXECUTABLE_SOURCES}
+  ${LIBRARY_SOURCES})
-    ${WIN_SOURCES}
-  )
-  add_library(ncmdump_lib SHARED
-    ${COMMON_HEADERS}
-    ${COMMON_SOURCES}
-    ${LIBRARY_HEADERS}
-    ${LIBRARY_SOURCES}
-    ${WIN_SOURCES}
-  )
 
-  set_target_properties(ncmdump_lib PROPERTIES OUTPUT_NAME "libncmdump")
+set_target_properties(ncmdump_lib PROPERTIES OUTPUT_NAME "ncmdump")
 
-  target_include_directories(ncmdump_lib PRIVATE src/include)
+target_include_directories(ncmdump_lib PRIVATE src/include)
 
-  target_link_libraries(ncmdump_lib tag)
+target_link_libraries(ncmdump_lib tag)
-  target_include_directories(ncmdump_lib PRIVATE taglib)
+target_include_directories(ncmdump_lib PRIVATE taglib)
-  target_include_directories(ncmdump_lib PRIVATE taglib/taglib)
+target_include_directories(ncmdump_lib PRIVATE taglib/taglib)
-  target_include_directories(ncmdump_lib PRIVATE taglib/taglib/toolkit)
+target_include_directories(ncmdump_lib PRIVATE taglib/taglib/toolkit)
-  target_include_directories(ncmdump_lib PRIVATE taglib/taglib/mpeg/id3v2)
+target_include_directories(ncmdump_lib PRIVATE taglib/taglib/mpeg/id3v2)
-
-  if(CMAKE_COMPILER_IS_GNUCXX)
-    # static link when using MinGW
-    target_link_options(ncmdump_exec PRIVATE -static)
-    target_link_options(ncmdump_lib PRIVATE -static)
-  endif()
-else()
-  add_executable(ncmdump_exec
-    ${COMMON_HEADERS}
-    ${COMMON_SOURCES}
-    ${EXECUTABLE_SOURCES}
-  )
-endif()
-
-# all executable target
-set_target_properties(ncmdump_exec PROPERTIES OUTPUT_NAME "ncmdump")
-target_include_directories(ncmdump_exec PRIVATE src/include)
-
-target_link_libraries(ncmdump_exec tag)
-target_include_directories(ncmdump_exec PRIVATE taglib)
-target_include_directories(ncmdump_exec PRIVATE taglib/taglib)
-target_include_directories(ncmdump_exec PRIVATE taglib/taglib/toolkit)
-target_include_directories(ncmdump_exec PRIVATE taglib/taglib/mpeg/id3v2)
 
 include(GNUInstallDirs)
-
-if(WIN32)
-  install(TARGETS ncmdump_exec ncmdump_lib
-    BUNDLE DESTINATION .
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-  )
-else()
-  install(TARGETS ncmdump_exec
-    BUNDLE DESTINATION .
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-  )
-endif()

README.md

@@ -1,9 +1,13 @@
-# ncmdump
+# ncmdump-android
 
 使用本程序可将下载的网易云音乐缓存文件（ncm）转换为 mp3 或 flac 格式
 
 ## 简介
 
+本分支是ncmdump在Android平台上的移植，taglib的android调整改自[taglib-ndk](https://github.com/tumugin/taglib-ndk)
+
+下为原简介：
+
 该版本为最早的 C++ 版本，也是作者开发的市面上第一个支持 ncm 转换的程序
 
 源码复刻自 anonymous5l/ncmdump (2021年10月6日，原作者已经删库)
@@ -18,7 +22,7 @@
 
 ### 命令行工具
 
-从 [Release](https://github.com/taurusxin/ncmdump/releases) 下载最新版本的对应系统的已编译好的二进制文件
+用法与原版相同
 
 使用 `-h` 或 `--help` 参数来打印帮助
 
@@ -65,9 +69,7 @@ ncmdump -d source_dir -o output_dir -r
 
 ### 动态库
 
-或者，如果你想利用此项目进行二次开发，例如在你的 C#、Python、Java 等项目中调用，你可以使用 `libncmdump` 动态库，具体使用方法见仓库的 `example` 文件夹
+或者，如果你想利用此项目进行二次开发，例如在你的Android应用中调用，你可以使用 `libncmdump` 动态库，具体使用方法如下
-
-请注意！如果你在 Windows 下开发，传递到库构造函数的文件名编码**必须为 UTF-8 编码**，否则会抛出运行时错误。
 
 ## 编译项目
 
@@ -84,34 +86,31 @@ cd ncmdump
 git submodule update --init --recursive
 ```
 
-使用 CMake 配置项目。Windows 下若使用 GNU 套件，推荐使用 [msys2](https://www.msys2.org/) 或者 [winlibs](https://winlibs.com/)
+调整CMakeLists.txt
 
-```shell
+# Android Studio
-# Windows MinGW
+置于你项目的cpp文件夹下
-cmake -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release -B build
 
-# Windows MSVC
+编译Android项目时自动编译，生成numdump和libncmdump.so
-cmake -G "Visual Studio 17 2022" -A x64 -B build
 
-# Linux / macOS
+# 使用
-cmake -DCMAKE_BUILD_TYPE=Release -B build
+```kotlin
+init {
+        System.loadLibrary("ncmdump") // 你的库名
+    }
 
-# 如果需要在 macOS 下交叉编译，可以指定 `CMAKE_OSX_ARCHITECTURES` 变量来指明目标系统架构
+external fun DumpFileTo(inputFilePath: String, outputCachePath: String): Int
-cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_OSX_ARCHITECTURES=arm64 -B build  # arm64
-cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_OSX_ARCHITECTURES=x86_64 -B build  # Intel-based
 ```
 
-编译项目
+# DumpFileTo用法
+inputFilePath：输入文件路径
+outputCachePath:输出文件路径
+返回：
+-1（失败）
+0（成功）
 
-```shell
+# 注意
-# Windows MSVC 需要在构建阶段指定 --config Release
+在 Android 11 以上的版本，Android对文件读取和写入有较严格的规定，因此上述目录应为应用私有的目录（比如cache）
-cmake --build build -j 8 --config Release
-
-# Windows MinGW / Linux / macOS
-cmake --build build -j 8
-```
-
-你可以在 `build` 文件夹下找到编译好的二进制文件，以及一个可供其它项目使用的动态库(Windows Only)，使用方法见仓库的 `example` 文件夹
 
 [![Powered by DartNode]( https://dartnode.com/branding/DN-Open-Source-sm.png)]( https://dartnode.com "Powered by DartNode - Free VPS for Open Source")
 

example/csharp/NeteaseCrypt.cs

@@ -1,74 +0,0 @@
-using System;
-using System.Runtime.InteropServices;
-
-namespace libncmdump_demo_cli
-{
-    /// <summary>
-    /// NeteaseCrypt C# Wrapper
-    /// </summary>
-    class NeteaseCrypt
-    {
-        const string DLL_PATH = "libncmdump.dll";
-
-        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
-        private static extern IntPtr CreateNeteaseCrypt(IntPtr path);
-
-        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
-        private static extern int Dump(IntPtr NeteaseCrypt, IntPtr outputPath);
-
-        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
-        private static extern void FixMetadata(IntPtr NeteaseCrypt);
-
-        [DllImport(DLL_PATH, CallingConvention = CallingConvention.Cdecl)]
-        private static extern void DestroyNeteaseCrypt(IntPtr NeteaseCrypt);
-
-        private IntPtr NeteaseCryptClass = IntPtr.Zero;
-
-        /// <summary>
-        /// 创建 NeteaseCrypt 类的实例。
-        /// </summary>
-        /// <param name="FileName">网易云音乐 ncm 加密文件路径</param>
-        public NeteaseCrypt(string FileName)
-        {
-            byte[] bytes = Encoding.UTF8.GetBytes(FileName);
-
-            IntPtr inputPtr = Marshal.AllocHGlobal(bytes.Length + 1);
-            Marshal.Copy(bytes, 0, inputPtr, bytes.Length);
-            Marshal.WriteByte(inputPtr, bytes.Length, 0);
-
-            NeteaseCryptClass = CreateNeteaseCrypt(inputPtr);
-        }
-
-        /// <summary>
-        /// 启动转换过程。
-        /// </summary>
-        /// <param name="OutputPath">指定一个路径输出，如果为空，则输出到原路径</param>
-        /// <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>
-        public int Dump(string OutputPath)
-        {
-            byte[] bytes = Encoding.UTF8.GetBytes(OutputPath);
-
-            IntPtr outputPtr = Marshal.AllocHGlobal(bytes.Length + 1);
-            Marshal.Copy(bytes, 0, outputPtr, bytes.Length);
-            Marshal.WriteByte(outputPtr, bytes.Length, 0);
-
-            return Dump(NeteaseCryptClass, outputPtr);
-        }
-
-        /// <summary>
-        /// 修复音乐文件元数据。
-        /// </summary>
-        public void FixMetadata()
-        {
-            FixMetadata(NeteaseCryptClass);
-        }
-
-        /// <summary>
-        /// 销毁 NeteaseCrypt 类的实例。
-        /// </summary>
-        public void Destroy()
-        {
-            DestroyNeteaseCrypt(NeteaseCryptClass);
-        }
-    }
-}

example/csharp/Program.cs

@@ -1,26 +0,0 @@
-using System;
-using System.Threading.Tasks;
-
-namespace libncmdump_demo_cli
-{
-    internal class Program
-    {
-        static void Main(string[] args)
-        {
-            // 文件名
-            string filePath = "test.ncm";
-
-            // 创建 NeteaseCrypt 类的实例
-            NeteaseCrypt neteaseCrypt = new NeteaseCrypt(filePath);
-
-            // 启动转换过程
-            int result = neteaseCrypt.Dump("");  // 为空则输出到源
-
-            // 修复元数据
-            neteaseCrypt.FixMetadata();
-
-            // [务必]销毁 NeteaseCrypt 类的实例
-            neteaseCrypt.Destroy();
-        }
-    }
-}

src/lib/libncmdump.cpp

@@ -1,5 +1,6 @@
 #include "libncmdump.h"
 #include <filesystem>
+#include <jni.h>
 
 namespace fs = std::filesystem;
 
@@ -29,3 +30,33 @@ extern "C" {
         delete neteaseCrypt;
     }
 }
+
+extern "C" JNIEXPORT jint JNICALL
+Java_com_pks_dencm_NativeConverter_DumpFileTo( // 替换为你的包名和类名
+        JNIEnv* env,
+        jobject /* this */,
+        jstring filePathJ,
+        jstring outputFolderJ) { // 这个 outputFolder 是 C++ 用来构造完整输出文件路径的目录
+
+    const char* ncmFilePathNativeChars = env->GetStringUTFChars(filePathJ, nullptr);
+    const char* outputDirNativeChars = env->GetStringUTFChars(outputFolderJ, nullptr);
+
+    if (ncmFilePathNativeChars == nullptr || outputDirNativeChars == nullptr) {
+        if (ncmFilePathNativeChars) env->ReleaseStringUTFChars(filePathJ, ncmFilePathNativeChars);
+        if (outputDirNativeChars) env->ReleaseStringUTFChars(outputFolderJ, outputDirNativeChars);
+        return -2; // JNI string conversion error
+    }
+
+    // 将 C 风格字符串转换为 std::filesystem::path
+    fs::path inputPath = fs::u8path(ncmFilePathNativeChars); // 从 C-string 构建 path
+    fs::path outputDirectoryForCpp = fs::u8path(outputDirNativeChars); // 从 C-string 构建 path
+
+    try{
+        NeteaseCrypt crypt(inputPath.u8string());
+        crypt.Dump(outputDirectoryForCpp.u8string());
+        crypt.FixMetadata();
+        return 0;
+    }catch (...){
+        return -1;
+    }
+}