Mplayer 移植

 关于mplayer移植网上资料很多，但都很混乱。在此，我做了一个关于mplayer 的详细总结。在做之前最好在解压源码包后，先通过./configure --help看一下相关配置。

X86的LINUX上已经自带了解码库，不需要另外安装解码库，而arm平台自己做的文件系统没有解码库，需要另外安装解码库。

下载MPlayer:MPlayer-1.0rc2.tar.bz2
        解码库：libmad-0.15.0b.tar.gz

一、在x86的LINUX上安装mplayer

1 #./configure （./configure    --enable-gui    –-enable-live    –-language=zh ）
        2 #make
        3 #make install

此时在MPlayer-1.0rc2目录下会生成可执行文件mplayer.
        把它拷贝到/bin/目录下。要执行时：
        #/bin/mpalyer /路径/要播放的媒体文件名；
        #/bin/mplayer a.mp3

二、移植mplayer到arm平台的LINUX上（使用4.3.2编译器）

1 配置安装libmad

(如果不先配置安装libmad，则在make mplayer时出现找不到mad.h 错误)
        echo PATH=/usr/local/arm/3.3.2/bin:$PATH

(1)#./configure --enable-fpm=arm --host=arm-none-linux-gnueabi --disable-shared --disable-debugging        --prefix=/usr/local/arm/3.3.2/lib CC=arm-none-linux-gnueabi-gcc

参数解析：
        --enable-fpm=arm
        --host=arm-none-linux-gnueabi
        --disable-shared
        --disable-debugging
        --prefix=/home/linux/libmad(make install 安装路径)
        CC=arm-none-linux-gnueabi-gcc(4.3.2的交叉编译工具链)

(2)#make

注意如果出现error:unrecognized command line option "-fforce-mem"错误，需要修改makefile,去掉--fforce-mem标志(因为arm-eabi编译器都不支持这个选项)

(3)#make install

此时会在/home/linux目录下生成include目录和lib目录。
        其中liclude目录下有文件 mad.h
        lib 目录有文件 libmad.a libmad.la

2 配置安装mplayer

(1)#./configure    --host-cc=gcc    --cc=arm-none-linux-gnueabi-gcc    --target=arm-linux    --enable-static    --enable-ossaudio    --prefix=/tmp/mplayer-rc2     --disable-win32dll    --disable-dvdread    --enable-fbdev    --disable-mencoder    --disable-live --disable-mp3lib --enable-mad --enable-libavcodec_a    --disable-armv5te    --disable-armv6    --disable-dvdnav    --disable-dvdread    --disable-dvdread-internal        with-extraincdir=/usr/local/arm/3.3.2/lib/include        --with-extralibdir=/usr/local/arm/3.3.2/lib/lib

参数解析：
        --host-cc=gcc         # C compiler for tools needed while building [gcc]
        --cc=arm-none-linux-gnueabi-gcc        #C compiler to build MPlayer [gcc]
        --target=arm-linux        #target platform (i386-linux, arm-linux, etc)
        --enable-static        #build a statically linked binary
        --enable-ossaudio        #enable OSS audio output [autodetect]
        --prefix=/tmp/mplayer-rc2        #prefix directory for installation [/usr/local]
        --disable-win32dll         # disable Win32 DLL support [enabled]
        --disable-dvdread        #disable libdvdread [autodetect]
        --enable-fbdev        #enable FBDev video output [autodetect]
        --disable-mencoder        #disable MEncoder (A/V encoder) compilation [enable] 使能编码器编辑
        --disable-live        #disable LIVE555 Streaming Media [autodetect] 让Mpalyer不支持流媒体协议
        --disable-mp3lib        # disable builtin mp3lib [enabled]
        --enable-mad        #disable libmad (MPEG audio) support [autodetect]
        --enable-libavcodec_a        #disable static libavcodec [autodetect]
        --disable-armv5te        #disable DSP extensions (ARM) [autodetect]
        --disable-armv6        #disable ARMv6 (ARM) [autodetect]
        --with-extraincdir=/usr/local/arm/3.3.2/lib/include        #指明mad.h文件所在路径
        --with-extralibdir=/usr/local/arm/3.3.2/lib/lib        #指明limad相关链接库所在路径

(2)#make

其中可能会遇到如下问题：

1.Error:motion_comp_arm_s.S

在libmpeg2/motion_comp_arm_s.S文件的最前面加上如下的内容：

#ifndef HAVE_PLD
        .macro pld reg
        .endm
        #endif

2.vo_ivtv.c:79: error: storage size of ’sd’ isn’t known

vo_ivtv.c:80: error: storage size of ’sd1′ isn’t known

添加--disable-ivtv

3. undefined reference to `video_out_ivtv'

在文件 file libvo/video_out.c, 找到
        #ifdef HAVE_DXR2
        extern vo_functions_t video_out_dxr2;
        #endif
        extern vo_functions_t video_out_dxr3;
        #ifdef HAVE_IVTV
        extern vo_functions_t video_out_ivtv;
        #endif
        edit it like this:
        #ifdef HAVE_DXR2
        extern vo_functions_t video_out_dxr2;
        #endif
        #ifdef HAVE_DXR3    //这一句是要添加的
        extern vo_functions_t video_out_dxr3;
        #endif    //这句是要添加的
        #ifdef HAVE_IVTV
        extern vo_functions_t video_out_ivtv;
        #endif

使用arm-linux-gcc 3.3.2编译mplayer可能会出现in.h头文件错误如下：

/usr/local/arm/3.3.2/include/netinet/in.h:259: parse error before '(' token
        /usr/local/arm/3.3.2/include/netinet/in.h:259: parse error before "__u32"
        /usr/local/arm/3.3.2/include/netinet/in.h:260: parse error before '(' token
        /usr/local/arm/3.3.2/include/netinet/in.h:260: parse error before "__u16"
        /usr/local/arm/3.3.2/include/netinet/in.h:262: parse error before '(' token
        /usr/local/arm/3.3.2/include/netinet/in.h:262: parse error before "__u32"

需要修改一下/usr/local/arm/3.3.2/include/netinet/in.h中,在 __BEGIN_DECLS 后面增加下述文字

#undef ntohl
        #undef ntohs
        #undef htonl
        #undef htons

(3) make install(出现提示不认识的文件。因为是ARM平台运行的文件，所有不认识)

install -m 755 -s mplayer /tmp/mplayer-rc2/bin
        strip: Unable to recognise the format of the input file `/tmp/mplayer-rc2/bin/mplayer'
        此时在MPlayer-1.0rc2目录下会生成可执行文件mplayer.
        把它拷贝到/bin/目录下。

要执行时：

#/bin/mpalyer /路径/要播放的媒体文件名；
        #/bin/mplayer -ac mad a.mp3

三、MPlayer slave命令

在命令中添加 -slave 和 -quiet就可以通过命令设置Mplayer实现相应的功能。在mplayer源码中的，/DOCS/tech/slave.txt中对这些命令有详细的解析。