此文已由作者郑博授权网易云社区发布。
欢迎访问网易云社区，了解更多网易技术产品运营经验
最近开始开发UWP平台的App，项目需要用到Taglib进行音视频文件的标签信息读写，Google并没有现成的Binaries可以使用；下面记录下自己编译的全过程。
1.工具准备：
a)Taglib源码：https://taglib.github.io/releases/taglib-1.10.tar.gz （这里选用1.10版本，其他版本可以在https://taglib.github.io上下载）
b)Zlib源码：https://github.com/madler/zlib/archive/v1.2.8.zip （这里选用1.2.8版本，其他版本可以在https://github.com/madler/zlib/releases上下载）
c)CMake工具：https://cmake.org/files/v3.4/cmake-3.4.1-win32-x86.exe （这里选用3.4.1版本，因为3.4.0以后的版本才支持VS2015）
工具安装和源码解压过程不再赘述。
2.Zlib编译：
a)点击“Browse Source...”选择zlib源码的存储目录，点击“Browse Build...”选择工程目录（这里不建议跟源码放在一个目录中，因为UWP要3个平台）
b)点击“Configure”这是会弹出一个选择compiler的弹框，这里简单说明一下，X86选Visual Studio 14 2015，X64选Visual Studio 14 2015 Win64，ARM选Visual Studio 14 2015 ARM，3个平台均勾选Use default native compilers即可，选Finish进行确认
c)修改CMAKE_C_FLAGS，最末尾添加/DWINAPI_FAMILY=WINAPI_FAMILY_APP /D_WIN32_WINNT=0x0A00
d)修改CMAKE_C_STANDARD_LIBRARIES，清空全部字段，填写WindowsApp.lib
e)修改各种INSTALL路径，改成自己的目标目录即可，不再赘述
f)点击Generate，在工程目录里打开zlib.sln，右键INSTALL工程，Build完Zlib就编译完成了，3个平台方法一致
3.Taglib编译：
a)同zlib
b)同zlib
c)修改CMAKE_C_FLAGS & CMAKE_CXX_FLAGS，最末尾添加/D_UNICODE /DUNICODE /DWINAPI_FAMILY=WINAPI_FAMILY_APP /D_WIN32_WINNT=0x0A00
d)修改CMAKE_C_STANDARD_LIBRARIES & CMAKE_CXX_STANDARD_LIBRARIES，清空全部字段，填写WindowsApp.lib
e)勾选ENABLE_STATIC
f)配置ZLIB_INCLUDE_DIR/ZLIB_LIBRARY_DEBUG/ZLIB_LIBRARY_RELEASE
g)修改各种INSTALL路径，改成自己的目标目录即可，不再赘述
h)点击Generate生成工程文件
因为Taglib在文件操作时使用了CreateFileW，但是这些接口UWP上是禁止使用的，我们要修改taglib oolkit filestream.cpp，完整修改代码如下：
/***************************************************************************
copyright : (C) 2002 - 2008 by Scott Wheeler
email : wheeler@kde.org
***************************************************************************/
/***************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License version *
* 2.1 as published by the Free Software Foundation. *
* *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA *
* 02110-1301 USA *
* *
* Alternatively, this file is available under the Mozilla Public *
* License Version 1.1. You may obtain a copy of the License at *
* http://www.mozilla.org/MPL/ *
***************************************************************************/
#include "tfilestream.h"
#include "tstring.h"
#include "tdebug.h"
#ifdef _WIN32
# include
#else
# include
# include
#endif
#ifdef _WIN32
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
# include
/*
convert string to wstring
*/
std::wstring c2w(const char *data)
{
int size = MultiByteToWideChar(CP_UTF8, 0, data, -1, nullptr, 0);
if (size > 0) {
auto wstr = std::make_unique(size);
if (MultiByteToWideChar(CP_UTF8, 0, data, -1, wstr.get(), size) > 0) {
return std::wstring(wstr.get());
}
}
return std::wstring(L"");
}
#endif
#endif
using namespace TagLib;
namespace
{
#ifdef _WIN32
// Uses Win32 native API instead of POSIX API to reduce the resource consumption.
typedef FileName FileNameHandle;
typedef HANDLE FileHandle;
const FileHandle InvalidFileHandle = INVALID_HANDLE_VALUE;
inline FileHandle openFile(const FileName &path, bool readOnly)
{
const DWORD access = readOnly ? GENERIC_READ : (GENERIC_READ | GENERIC_WRITE);
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM)
const wchar_t *fp = NULL;
std::wstring wstr = path.wstr();
if (!wstr.empty())
fp = wstr.c_str();
else if (!path.str().empty()) {
wstr = c2w(path.str().c_str());
if (!wstr.empty())
fp = wstr.c_str();
}
if (fp)
return CreateFile2(fp, access, FILE_SHARE_READ, OPEN_EXISTING, NULL);
#else
if(!path.wstr().empty())
return CreateFileW(path.wstr().c_str(), access, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
else if(!path.str().empty())
return CreateFileA(path.str().c_str(), access, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
#endif
else
return InvalidFileHandle;
}
inline void closeFile(FileHandle file)
{
CloseHandle(file);
}
inline size_t readFile(FileHandle file, ByteVector &buffer)
{
DWORD length;
if(ReadFile(file, buffer.data(), static_cast(buffer.size()), &length, NULL))
return static_cast(length);
else
return 0;
}
inline size_t writeFile(FileHandle file, const ByteVector &buffer)
{
DWORD length;
if(WriteFile(file, buffer.data(), static_cast(buffer.size()), &length, NULL))
return static_cast(length);
else
return 0;
}
#else // _WIN32
struct FileNameHandle : public std::string
{
FileNameHandle(FileName name) : std::string(name) {}
operator FileName () const { return c_str(); }
};
typedef FILE* FileHandle;
const FileHandle InvalidFileHandle = 0;
inline FileHandle openFile(const FileName &path, bool readOnly)
{
return fopen(path, readOnly ? "rb" : "rb+");
}
inline void closeFile(FileHandle file)
{
fclose(file);
}
inline size_t readFile(FileHandle file, ByteVector &buffer)
{
return fread(buffer.data(), sizeof(char), buffer.size(), file);
}
inline size_t writeFile(FileHandle file, const ByteVector &buffer)
{
return fwrite(buffer.data(), sizeof(char), buffer.size(), file);
}
相关文章：
【推荐】 从golang的垃圾回收说起（上篇）
【推荐】 2018中国云原生用户大会：网易云深度解析微服务框架