分类: 嵌入式
2015-07-03 21:51:20
mp3播放器madplay移植过程详解
15年6月6月21月21日21日日17:54:56
一、在PC机上编译测试
错误1:
cc1: error: unrecognized command line option “-fforce-mem”
在我编译安装的时候出现下面的错误
cc1:
error: unrecognized command line option
“-fforce-mem”
其实这个错误是编译安装libmad时候引起的,audacity包含libmad
解决方式是:找到libmad
configure之后的Makefile,
vi
Makefile
找到包含"-fforce-mem"字符串,将其删除,就ok了
原因是gcc
3.4 或者更高版本,已经将其去除了,所以会出现上面的错误!
Compiling libmad with gcc 3.4 or higher will produce the following error: cc1:
error: unrecognized command line option “-fforce-mem”. The build option “-fforce-mem” has been kicked out of gcc, so you
need to alter the makefile (just vi Makefile after you have
configured, hit “/” to search for the entry and delete it)
http://dev.firnow.com/course/6_system/linux/Linuxjs/20100520/202817.html
错误2:缺少zlib,安装之
derek@derek-virtual-machine:~/mini2440/madplay/src-x86/madplay-0.15.0b$ sudo aptitude install zlib1g-dev
http://www.cnblogs.com/lling1105/archive/2008/01/03/1024104.html
错误3:缺少mad.h头文件,加上之,注意加上CPPFLAGS标志-I
configure: error: mad.h was not found
*** You must first install libmad before you can build this package.
*** If libmad is already installed, you may need to use the CPPFLAGS
*** environment variable to specify its installed location, e.g. -I<dir>.
derek@derek-virtual-machine:~/mini2440/madplay/src-x86/madplay-0.15.0b$ ./configure --prefix=/home/derek/mini2440/madplay/target-x86/ CPPFLAGS=-I/home/derek/mini2440/madplay/target-x86/include
错误4:缺少libmad文件,加上之,注意加上LDFLAGS 标志-L
configure: error: libmad was not found
*** You must first install libmad before you can build this package.
*** If libmad is already installed, you may need to use the LDFLAGS
*** environment variable to specify its installed location, e.g. -L<dir>.
derek@derek-virtual-machine:~/mini2440/madplay/src-x86/madplay-0.15.0b$ ./configure --prefix=/home/derek/mini2440/madplay/target-x86/ CPPFLAGS=-I/home/derek/mini2440/madplay/target-x86/include LDFLAGS=-L/home/derek/mini2440/madplay/target-x86/lib
checking for gcc... gcc
checking for C compiler default output... configure: error: C compiler cannot create executables
See `config.log' for more details.
derek@derek-virtual-machine:~/mini2440/madplay/src-x86/madplay-0.15.0b$ sudo apt-get install build-essential g++
二、往arm目标机移植
错误1:
checking zlib.h usability... no
checking zlib.h presence... no
checking for zlib.h... no
configure: error: zlib.h was not found
*** You must first install zlib (libz) before you can build this package.
*** If zlib is already installed, you may need to use the CPPFLAGS
*** environment variable to specify its installed location, e.g. -I<dir>.
下载zlib-1.2.5.tar.gz解压,然后执行export CC=arm-linux-gcc,这个很重要,这样后面的在当前的shell中的默认都是arm-linux-gcc编译了
执行 export $CC 确认一下
在zlib目录下执行,
./configure --prefix=/home/derek/mini2440/madplay/target-arm
make && make install
zlib安装成功
在libid3tag目录下执行,libid3tag依赖与zlib,
./configure --host=arm-linux –prefix=/home/derek/mini2440/madplay/target-arm
如果还出现上述错误,则显示指定CPPFLAGS 和 LDFLAGS ,如下;
./configure --host=arm-linux --prefix=/home/derek/mini2440/madplay/target-arm CPPFLAGS=-I/home/derek/mini2440/madplay/target-arm/include LDFLAGS=-L/home/derek/mini2440/madplay/target-arm/lib
make && make install
libid3tag安装成功
在libmad目录下执行,
./configure --host=arm-linux –prefix=/home/derek/mini2440/madplay/target-arm
make && make install
libmad安装成功
在madplay目录下执行,
./configure --host=arm-linux --prefix=/home/derek/mini2440/madplay/target-arm CPPFLAGS=-I/home/derek/mini2440/madplay/target-arm/include LDFLAGS=-L/home/derek/mini2440/madplay/target-arm/lib
make && make install
madplay安装成功
到target-arm目录下执行,打包,通过上传至目标板:
tar cvzf target-arm.tar.gz target-arm/
ftp 192.168.1.230
然后将bin下的madplay重命名放到/usr/bin目录下
在将lib下的所有库放到/usr/lib目录下
三、也可以参考如下两片文章的做法:
http://blog.chinaunix.net/space.php?uid=23089249&do=blog&cuid=2139514
目标板
:博创2410s
编译器
:arm-linux-gcc-3.4.1
编译步骤:
1. 移植madplay前的准备。
madplay的移植需要以下的几个包:
(1)madplay-0.15.2b.tar.gz,
(2)libmad-0.15.1b.tar.gz,
(3)libid3tag-0.15.1b.tar.gz ,
(4) zlib-1.1.4.tar.gz。
其中前面三个包可以在 style="font-family:'Droid Sans Fallback, sans-serif';">下载,后一个包可以在 style="font-family:'Droid Sans Fallback, sans-serif';">中找到。
为了编译这个播放器,还需要一个交叉编译器,我用的是arm-linux-gcc
3.4.1版本。
下载地址:
2. 建立了一个名为“madplayer”的目录,我的madplayer目录为/arm2410s/madplayer。然后把四个gz都移动到这个目录下,解压并改名,同时还建立了一个名为“libz”的目录,作为库目录。
[root@localhost
madplayer]# tar zxvf madplay-0.15.2b.tar.gz
[root@localhost
madplayer]# mv madplay-0.15.2b madplay
[root@localhost
madplayer]# tar zxvf libmad-0.15.1b.tar.gz
[root@localhost
madplayer]# mv libmad-0.15.1b libmad
[root@localhost
madplayer]# tar zxvf libid3tag-0.15.1b.tar.gz
[root@localhost
madplayer]# mv libid3tag-0.15.1b libid3tag
[root@localhost
madplayer]# tar zxvf zlib-1.1.4.tar.gz
[root@localhost
madplayer]# mv zlib-1.1.4 zlib
[root@localhost madplayer]# mkdir
libz
3. 编译zlib-1.1.4(编译libid3tag需要用到)
先输入./configure
--prefix=/arm2410s/madplayer/libz。生成Makefile文件,
[root@localhost
madplayer]# cd zlib
[root@localhost zlib]# ./configure
--prefix=/arm2410s/madplayer/libz
[root@localhost zlib]# vi
Makefile
再修改(不能跟上面的步骤调转)makefile文件:
CC=/usr/local/arm/3.4.1/bin/arm-linux-gcc
AR=/usr/local/arm/3.4.1/bin/arm-linux-ar rcs
RANLIB=/usr/local/arm/3.4.1/bin/arm-linux-ranlib
注: 如果之前编译过,则先要把上次编译的结果清除:make distclean
接着make
然后make
install
[root@localhost zlib]#
make
[root@localhost zlib]# make
install
编译好之后就可以在上面prefix指定的目录下的lib目录下找到libz.a这个库。
4. 编译libid3tag
[root@localhost
zlib]# cd ../libid3tag
[root@localhost libid3tag]# ./configure
CC=/usr/local/arm/3.4.1/bin/arm-linux-gcc
--prefix=/arm2410s/madplayer/libz --host=arm-linux --disable-shared
CPPFLAGS=-I/arm2410s/madplayer/libz/include
LDFLAGS=-L/arm2410s/madplayer/libz/lib
[root@localhost
libid3tag]# make
[root@localhost libid3tag]# make install
5. 编译libmad
[root@localhost
libid3tag]# cd ../libid3tag
[root@localhost libmad]# ./configure
CC=/usr/local/arm/3.4.1/bin/arm-linux-gcc
--prefix=/arm2410s/madplayer/libz --host=arm-linux --disable-shared
CPPFLAGS=-I/arm2410s/madplayer/libz/include
LDFLAGS=-L/arm2410s/madplayer/libz/lib
[root@localhost libmad]#
make
[root@localhost libmad]# make install
6. 编译madplay
[root@localhost
libmad]# cd ../madplay
[root@localhost madplay]# ./configure
CC=/usr/local/arm/3.4.1/bin/arm-linux-gcc
--prefix=/arm2410s/madplayer/libz --host=arm-linux --disable-shared
--enable-static CPPFLAGS=-I/arm2410s/madplayer/libz/include
LDFLAGS=-L/arm2410s/madplayer/libz/lib
然后,make,生成了madplay可执行文件
[root@localhost
madplay]# make
7.把madplay可执行文件下载到板子上测试,输入
/tmp/madplayer/madplay
# ./madplay
NewDivide.mp3
美妙的歌曲荡漾耳边
注意,要想听到音乐,你得确保你已经安装了声卡驱动,否则你会出现类似以下的错误提示:
PEG
Audio Decoder 0.15.2 (beta) - Copyright (C) 2000-2004 Robert Leslie
et al.
audio: /dev/dsp: No such file or directory
编译中,可能遇到的问题:
如果出现这样的错误提示:
error:
libz was not found
*** You must first install zlib (libz) before
you can build this package.
*** If zlib is already installed, you
may need to use the LDFLAGS
*** environment variable to specify
its installed location, e.g. -L.
则是没有正确配置编译好zlib 导致的,如果要正确配置,参考步骤3。
最后编译出来的mdaplay 在开发板上运行时出现如下所示的提示:
madplay:
error while loading shared libraries: cannot open shared object
file: cannot load sharedobject file: No such file or
directory
则是因为在编译时没有设置好静态链接和共享库,正确的配置就是在编译,libid3tag、libmad 和madplay 时,加上disable-shared 选项,同时在madplay 的配置语句上加上enable-static设置为静态。
http://blog.mcuol.com/User/allenwoo/article/6754_1.htm
又是一篇公司技术文档啦!
如你们看了我的技术文档,去Genny杭州半导体面试或许很有优势哦
移植madplay 需要如下文件:madplay-b.tar.gz,libmad-0.15.1b.tar.gz,libid3tag-0.15.1b.tar.gz 和 zlib-1.2.3.tar.gz。
这里列出它们的下载地址:前三个文件的下载地址在这个网站可以找到相应的链接:
zlib-.tar.gz (zlib-1.2.3.tar.gz类似)的下载地址为:
1、配置编译环境
我们使用的是装有Vmware的RedHat开发环境,交叉编译器放/usr/local/arm-uclinux-tools/bin/目录下的。首先在根目录下面建立了一个名为“madplayer”的目录,然后把四个gz都解压到这个目录下面,同时还建立了一个名为“libz”的目录,作为存放所生成的文件的地方,总共在/madplayer目录下,有5 个目录。
[root@localhost madplayer]# ls
libid3tag-b libmad-0.15.1b libz madplay-0.15.2b zlib-1.2.3
[root@localhost madplayer]#
2、 编译zlib-
首先配置configure 文件,改动如下:
u 把AR=${AR-" ar rc"}改为:
AR=${AR-"/usr/local/arm-uclinux-tools/bin/arm-uclinux-elf-ar rcs"}
u 把RANLIB=${RANLIB-"ranlib"}改为:
RANLIB=${RANLIB-"/usr/local/arm-uclinux-tools/bin/arm-uclinux-elf-ranlib"}
u 把cc=${CC-gcc}改为:
cc=${CC-/usr/local/arm-uclinux-tools/bin/arm-uclinux-elf -gcc}
u 然后保存它,使用如下指令编译:
如果之前编译过,则先要把上次编译的结果清除:make distclean
然后输入:./configure --prefix=/root/madplayer/libz
待上步完成后,输入:make
然后再输入:make install
到此,编译zlib- 就算完成了。
3、 编译libid3tag-b
在完成zlib- 的编译后,才能进行libid3tag-0.15.1b 的编译。
配置Makefile:
CC=/usr/local/arm-uclinux-tools/bin/arm-uclinux-elf-gcc ./configure --host=arm-uclinux-elf --prefix=/root/madplayer/libz --disable-shared CPPFLAGS=-I/root/madplayer/libz/include
LDFLAGS=-L/root/madplayer/libz/lib;
然后使用:make,
最后使用:make install 完成libid3tag-b 的编译。
4、 编译libmad-b
配置Makefile:
CC=/usr/local/arm-uclinux-tools/bin/arm-uclinux-elf-gcc ./configure
--host=arm-uclinux-elf --prefix=/root/madplayer/libz –disable-shared
然后使用:make,生成所需的库文件;
最后使用:make install 完成libmad-b 的编译。
5、 编译madplay-b
配置Makefile:
CC=/usr/local/arm-uclinux-tools/bin/arm-uclinux-elf-gcc ./configure --host=arm-uclinux-elf --prefix=/root/madplayer/libz --disable-shared --enable-static CPPFLAGS=-I/root/madplayer/libz/include
LDFLAGS=-L/root/madplayer/libz/lib;
然后使用:make,最后在madplay-b 目录下面生成大小为617KB 的madplay的可执行文件。
6、 然收把madplay的可执行文件放到romfs的bin目录下,用genromfs工具形成romfs.img文件,烧到开发板。就可以正常的播放MP3 歌曲了。
缺省格式:madplay /yourname/*.mp3
7、 编译中,可能遇到的问题:
u 如果出现这样的错误提示:
error: libz was not found
*** You must first install zlib (libz) before you can build this package.
*** If zlib is already installed, you may need to use the LDFLAGS
*** environment variable to specify its installed location, e.g. -L
.
则是没有正确配置编译好zlib 导致的,如果要正确配置,参考步骤2。
u 最后编译出来的mdaplay 在开发板上运行时出现如下所示的提示:
madplay: error while loading shared libraries: cannot open shared object file: cannot load sharedobject file: No such file or directory
则是因为在编译时没有设置好静态链接和共享库,正确的配置就是在编译,libid3taglibmad 和madplay 时,加上disable-shared 选项,同时在madplay 的配置语句上加上enable-static设置为静态。
总结:关于madplayer播放器,虽然MAD is a high-quality MPEG audio decoder,支持MPEG-1,MPEG-2, All three audio layers— Layer I, Layer II, and Layer III (i.e. MP3),但是,由于其强大的功能,带来的是占用较大资源。另外,基于ARM7TFMI的音频处理器(GE9008)是否有足够快速强大的运算能力也是个问题。