Linux交叉编译vlc

apt-get install gcc-mingw-w64-i686 g++-mingw-w64-i686 mingw-w64-tools
# for x64
#apt-get install gcc-mingw-w64-x86-64 g++-mingw-w64-x86-64 mingw-w64-tools
apt-get install lua5.1 libtool automake autoconf autopoint make 
apt-get install gettext pkg-config git subversion cmake cvs zip p7zip-full nsis bzip2

从这里下载mingw-w64-i686-dev.deb。以及可能的依赖项，见这里mingw-w64-common.deb。dpkg -i *.deb 安装之。

git clone git://git.videolan.org/vlc.git
cd vlc
mkdir -p contrib/win32
cd contrib/win32
../bootstrap --host=i686-w64-mingw32
make prebuilt

x64需要删除文件 rm -f ../i686-w64-mingw32/bin/moc ../i686-w64-mingw32/bin/uic ../i686-w64-mingw32/bin/rcc

注意：若使用prebuilt库，合适的版本很重要，若编译各种奇奇怪怪的问题，可以考虑换一个prebuilt压缩包

./bootstrap
mkdir win32 && cd win32
export PKG_CONFIG_LIBDIR=$HOME/vlc/contrib/i686-w64-mingw32/lib/pkgconfig
../configure --help  #确认选项
../configure --host=i686-w64-mingw32 \
	--disable-sout \
	--enable-static=false \
	--disable-nls \
	--disable-debug \
	--disable-gprof \
	--disable-cprof \
	--disable-coverage \
	--disable-lua \
	--disable-httpd \
	--disable-dc1394 \
	--disable-dv1394 \
	--disable-dvdread \
	--disable-dvdnav \
	--disable-bluray \
	--disable-smbclient \
	--disable-sftp \
	--disable-vcd \
	--disable-vcdx \
	--disable-screen \
	--disable-vnc \
	--disable-freerdp \
	--disable-chromaprint \
	--disable-chromecast \
	--disable-taglib \
	--disable-upnp \
	--disable-qt
make

vlc的界面是qt写的，那货用linux交叉编译，死活编译不过，也不知道问题在哪里

为了减少尺寸，首先应该裁剪一些不需要的功能，这样就可以砍掉大部分plugin的dll。

其次，在configure时，默认的编译选项是”-g -O2“。我们可以在configure之前设置环境变量CFLAGS、CXXFLAGS，取消-g选项。

export CFLAGS="-O2"
export CXXFLAGS="-O2"

不过笔者亲测，发现dll还是很多，若使用官方prebuilt的库。比如libavcodec就有40多M，若-g甚至到了50M。尝试很多办法，都没有讲大小缩下去。最后发现官方prebuilt的库都包含完整调试信息。所以直接干掉就行了。

find vlc/win32 -name "*.dll" -type f | xargs -i strip --strip-all {}

最新的vlc（2.*.*)已经将浏览器插件作为一个独立的工程实现，所以为了编译，先单独下载源码。安装一些依赖的库

git clone git://git.videolan.org/npapi-vlc.git
apt-get install libwine-dev

cd npapi-vlc
./autogen.sh

# 在vlc编译环境目录下查找libvlc.pc所在目录
export PKG_CONFIG_LIBDIR=/home/king/vlc/win32/_win32/lib/pkgconfig/
# 写死，我不需要编译firefox和chrome的插件
export FETCH_NPAPI_FALSE="#"
# 根据vlc编译环境来设置
export LIBVLC_CFLAGS="-I/home/king/vlc/include/ -O2"
# 同样查找libvlc.dll来设置
export LIBVLC_LIBS="-L/home/king/vlc/win32/lib/.libs/ -lvlc"
# 只编译activex。npapi需要去google code下载一些东西，那玩意被强了。
./configure --host=i686-w64-mingw32 --disable-npapi
make -j8

常见问题

checking for LIBVLC... yes
Package libvlc was not found in the pkg-config search path.
Perhaps you should add the directory containing `libvlc.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libvlc' found

king@debian:~/vlc/lib$ find /home/king/vlc -name libvlc.pc
/home/king/vlc/win32/lib/libvlc.pc
/home/king/vlc/win32/_win32/lib/pkgconfig/libvlc.pc

checking that generated files are newer than configure... done
configure: error: conditional "FETCH_NPAPI" was never defined.
Usually this means the macro was only invoked conditionally.

export FETCH_NPAPI_FALSE="#"

king@debian:~/npapi-vlc$ find . -name "*.dll"
./activex/.libs/axvlc.dll

替换插件图标

king@debian:~/npapi-vlc$ find . -name "*.bmp" -o -name "*.ico"
./share/pixmaps/win32/fullscreen.bmp
./share/pixmaps/win32/defullscreen.bmp
./share/pixmaps/win32/volume-muted.bmp
./share/pixmaps/win32/vlc.ico
./share/pixmaps/win32/volume.bmp
./share/pixmaps/win32/pause.bmp
./share/pixmaps/win32/play.bmp

经查，这些默认的bmp是灰度的，若改成彩色，可以将其存储为24色RGB，并且不要包含色彩空间信息

--- a/activex/plugin.cpp
+++ b/activex/plugin.cpp
@@ -228,23 +228,23 @@ VLCPlugin::VLCPlugin(VLCPluginClass *p_class, LPUNKNOWN pUnkOuter) :
 {
	 _ViewRC.hDeFullscreenBitmap =
		 LoadImage(DllGetModule(), MAKEINTRESOURCE(3),
-                  IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS);
+                  IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION);

	 _ViewRC.hBackgroundIcon =
		 (HICON) LoadImage(DllGetModule(), MAKEINTRESOURCE(8),
-                          IMAGE_ICON, 0, 0, LR_DEFAULTSIZE);
+                          IMAGE_ICON, 0, 0, LR_DEFAULTCOLOR);

将中央的图标可以支持任意尺寸，（注意：若ico有多张图片，那么GetIconInfo获取的大小不准确）

--- a/common/win32_fullscreen.cpp
+++ b/common/win32_fullscreen.cpp
@@ -655,9 +655,13 @@ LRESULT VLCHolderWnd::WindowProc(UINT uMsg, WPARAM wParam, LPARAM lParam)
			 HDC hDC = BeginPaint(hWnd(), &PaintStruct);
			 RECT rect;
			 GetClientRect(hWnd(), &rect);
-            int IconX = ((rect.right - rect.left) - GetSystemMetrics(SM_CXICON))/2;
-            int IconY = ((rect.bottom - rect.top) - GetSystemMetrics(SM_CYICON))/2;
-            DrawIcon(hDC, IconX, IconY, RC().hBackgroundIcon);
+
+            ICONINFO icon_info_;
+            ::GetIconInfo(RC().hBackgroundIcon,&icon_info_);
+
+            int IconX = ((rect.right - rect.left) - icon_info_.xHotspot)/2;
+            int IconY = ((rect.bottom - rect.top) - icon_info_.yHotspot)/2;
+            DrawIconEx(hDC, IconX, IconY, RC().hBackgroundIcon,icon_info_.xHotspot,icon_info_.yHotspot,0,NULL,DI_NORMAL);
			 EndPaint(hWnd(), &PaintStruct);
			 break;

--- a/configure.ac
+++ b/configure.ac
@@ -2,19 +2,19 @@ dnl Autoconf settings for vlc
 
 AC_COPYRIGHT([Copyright 2002-2014 VLC authors and VideoLAN])
 
-AC_INIT(vlc, 3.0.0-git)
+AC_INIT(King, 1.0.0)
 VERSION_MAJOR=3
 VERSION_MINOR=0
 VERSION_REVISION=0
 VERSION_EXTRA=0
-VERSION_DEV=git
+VERSION_DEV=0
 
-PKGDIR="vlc"
+PKGDIR="King"
 AC_SUBST(PKGDIR)
 
 CONFIGURE_LINE="`echo "$0 $ac_configure_args" | sed -e 's/\\\/\\\\\\\/g'`"
-CODENAME="Vetinari"
-COPYRIGHT_YEARS="1996-2014"
+CODENAME="Test"
+COPYRIGHT_YEARS="2013-2014"
 
 AC_CONFIG_SRCDIR(src/libvlc.c)
 AC_CONFIG_AUX_DIR(autotools)

#define COMPANY_STR "VLCVlan"
#define PROGRAM_STR "VLCVlanPlugin"
#define DESCRIPTION "VLCVlan ActiveX Plugin and IE Web Plugin"

[
  uuid(9BE31822-FDAD-461B-AD51-BE1D1C159921),
  helpstring("VLC control"),
  control
]
coclass VLCPlugin2
{
	[default] interface IVLCControl2;
	interface IVLCControl;
	[default, source] dispinterface DVLCEvents;
};

[axvlc.dll]
FileVersion=@VERSION_MAJOR@,@VERSION_MINOR@,@VERSION_REVISION@,0
clsid={9BE31822-FDAD-461B-AD51-BE1D1C159921}
RegisterServer=no
Hook=runinstaller

编译npapi插件

为了支持chrome，firefox等浏览器，需要使用npapi插件，编译之前，需要先下载npapi的sdk。代码在google code，不幸的是被强了。

翻墙下载代码svn checkout http://npapi-sdk.googlecode.com/svn/trunk/ npapi-sdk-read-only

export MOZILLA_CFLAGS="-I/home/king/npapi-sdk/headers/ -g2"
export CFLAGS="-I/home/king/npapi-sdk/headers/ -g2"
./configure --host=i686-w64-mingw32  #不要--disable-npapi
make -j8

同activex的插件，npapi/vlcplugin_win.cpp中读取图片的代码也需要同步更新

VlcPluginWin::VlcPluginWin(NPP instance, NPuint16_t mode) :
	VlcPluginBase(instance, mode), _NPWndProc(0),
	_WindowsManager(DllGetModule(), _ViewRC, &get_options())
{
	_ViewRC.hDeFullscreenBitmap =
		LoadImage(DllGetModule(), MAKEINTRESOURCE(3),
				  IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION);

	_ViewRC.hPlayBitmap =
		LoadImage(DllGetModule(), MAKEINTRESOURCE(4),
				  IMAGE_BITMAP, 0, 0, LR_CREATEDIBSECTION);

npapi使用type=”application/x-vlc-plugin”来定位（和activex的guid不同）插件，所以需要修改npapi/vlcshell.cpp

static char mimetype[] =
	/* MPEG-1 and MPEG-2 */
	"audio/mpeg:mp2,mp3,mpga,mpega:MPEG audio;"
	"audio/x-mpeg:mp2,mp3,mpga,mpega:MPEG audio;"
	"video/mpeg:mpg,mpeg,mpe:MPEG video;"
	"video/x-mpeg:mpg,mpeg,mpe:MPEG video;"

在firefox中的插件管理器可以看到一堆属性，这些定义在npapi/package/npvlc_rc.rc.in和npapi/package/vlc.r.in中。需要注意的是，下面三个要匹配更新

VALUE "MIMEType", "audio/mpeg|audio/x-mpeg|video/mpeg|video/x-mpeg|video/mpeg-system
VALUE "FileExtents", "mp2,mp3,mpga,mpega|mp2,mp3,mpga,mpega|mpg,mpeg,mpe
VALUE "FileOpenName","MPEG audio|MPEG audio|MPEG video|MPEG video

安装依赖库和工具

常见问题

替换插件图标

编译npapi插件

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