madplay在AM335X上移植

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madplay在AM335X上移植

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1、下载与解压

     分享一个源码附件： madplay移植.rar (1.53 MB, 下载次数: 1044)

2016-3-25 14:30 上传

点击文件名下载附件

     将下载好的文件放到自定一个目录下(里面有四个文件)

     本人放到了：/home/voip_server_am335x_project/app/app/madplay/目录下了

     分别解压这四个文件

     #tar xvzf zlib-1.1.4.tar.gz

     #tar xvzf libid3tag-0.15.1b.tar.gz

     #tar xvzf libmad-0.15.1b.tar.gz

     #tar xvzf madplay-0.15.2b.tar.gz

     并新建一个安装目录

     #mkdir install

2、编译与安装

     a)编译zlib-1.1.4

     #cd zlib-1.1.4/

     #./configure --prefix=./configure --prefix=/home/voip_server_am335x_project/app/app/madplay/install

     更改Makefile     

     #gedit Makefile
     改为：CC=arm-linux-gnueabihf-gcc
              AR=arm-linux-gnueabihf-ar rc
              RANLIB=arm-linux-gnueabihf-ranlib
     #make
     #make install   
     b)编译libid3tag-0.15.1b
     #cd ../libid3tag-0.15.1b/
     #./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc --prefix=/home/voip_server_am335x_project/app/app/madplay/install CPPFLAGS=-I/home/voip_server_am335x_project/app/app/madplay/install/include LDFLAGS=-L/home/voip_server_am335x_project/app/app/madplay/install/lib
     #make
     编译时会发生如下错误：
/home/voip_server_am335x_project/app/app/madplay/lib-install/lib/libz.a: could not read symbols: Bad value
collect2: error: ld returned 1 exit status
     这时要重新编译上一个库zlib-1.1.4
     回到上个zlib-1.1.4目录中
     #cd ../zlib-1.1.4/
     更改Makefile               
     #gedit Makefile
     改为：CFLAGS=-O3 -DHAVE_UNISTD_H -DUSE_MMAP -fPIC （就是在最后添加-fPIC选项）
     重新编译安装
     #make clean ; make ; make install;     

    回到libid3tag-0.15.1b目录中，继续编译
    #cd ../libid3tag-0.15.1b/
     #make
     #make install
     c)编译libmad-0.15.1b
     #cd ../libmad-0.15.1b/
     #./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc --prefix=/home/voip_server_am335x_project/app/app/madplay/install CPPFLAGS=-I/home/voip_server_am335x_project/app/app/madplay/install/include LDFLAGS=-L/home/voip_server_am335x_project/app/app/madplay/install/lib
     #make
     编译时会发生如下错误：
arm-linux-gnueabihf-gcc: error: unrecognized command line option '-fforce-mem'
      这个要在Makefile中去了-fforce-mem
     #gedit Makefile
     将：CFLAGS = -Wall -g -O -fforce-mem -fforce-addr -fthread-jumps -fcse-follow-jumps -fcse-skip-blocks -fexpensive-optimizations -fregmove -fschedule-insns2 -fstrength-reduce
     改为：CFLAGS = -Wall -g -O  -fforce-addr -fthread-jumps -fcse-follow-jumps -fcse-skip-blocks -fexpensive-optimizations -fregmove -fschedule-insns2 -fstrength-reduce      


     保存继续编译
     #make
     编译时又发生如下错误：
/tmp/ccrtagSq.s: Assembler messages:/tmp/ccrtagSq.s:2696: Error: selected processor does not support Thumb mode `rsc r0,r0,#0'
/tmp/ccrtagSq.s:2901: Error: selected processor does not support Thumb mode `rsc r8,r8,#0'
/tmp/ccrtagSq.s:3580: Error: selected processor does not support Thumb mode `rsc r0,r0,#0'
/tmp/ccrtagSq.s:3782: Error: selected processor does not support Thumb mode `rsc r8,r8,#0'
Makefile:383: recipe for target 'synth.lo' failed
make[2]: *** [synth.lo] Error 1
      这个问题折磨了我好久T_T,到网上找了好久也没有结果。。。。

      在我看./configure -h 时看到了--enable-speed          optimize for speed over accuracy这一项，我就好奇加上了这一项，结果编译通过了，瞎猫碰见了死耗子，嘿嘿^_^ ……
      这时我们要重新配置Makefile，在原来的后面加上 --enable-speed
     #./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc --prefix=/home/voip_server_am335x_project/app/app/madplay/install CPPFLAGS=-I/home/voip_server_am335x_project/app/app/madplay/install/include LDFLAGS=-L/home/voip_server_am335x_project/app/app/madplay/install/lib --enable-speed
      生成Makefile后同样去了-fforce-mem选项重新编译     
     #make
     #make install     
      d)编译madplay-0.15.2b
     #cd ../madplay-0.15.2b/
     #./configure --host=arm-linux-gnueabihf CC=arm-linux-gnueabihf-gcc --prefix=/home/voip_server_am335x_project/app/app/madplay/install CPPFLAGS=-I/home/voip_server_am335x_project/app/app/madplay/install/include LDFLAGS=-L/home/voip_server_am335x_project/app/app/madplay/install/lib
     #make
     #make install
3、移植到目标板上        
     将install目录下bin中的madplay复制到目标板/usr/sbin/目录中
     将install目录下lib中的libid3tag.so  libid3tag.so.0  libid3tag.so.0.3.0  libmad.so  libmad.so.0  libmad.so.0.2.1复制到目标板/usr/sbin/目录中 （复制时要注意链接文件，cp命令要加上-rfa）。
end
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最后在播放测试时报错，如下：
audio: /dev/dsp: No such file or directory
这要重配置内核
<*>Device Drivers--->


     <*>sound card support --->


           <*>advanced linux soune architecture -->               


                       <*>OSS Mixer API


                       <*>OSS PCM (digital audio) API

编译运行
此时播放测试又报错，如下：
ASoC: unmatched rate symmetry: 8000 - 44100
output: ioctl(SNDCTL_DSP_SPEED): Invalid argument

这要修改内核驱动代码
打开linux-3.18.24\sound\soc\davinci\davinci-mcasp.c文件
修改：#define DAVINCI_MCASP_RATES        SNDRV_PCM_RATE_8000_192000
为：#define DAVINCI_MCASP_RATES        SNDRV_PCM_RATE_44100
保存编译运行
此时可以播放MP3文件了^_^