ORTP库的移植

1、准备源码
(1)下载ortp源码：https://github.com/dmonakhov/ortp
(2)存放到临时工作目录并解压

2、源码修改
(1)由于这个没有支持H.264，所以增加H.264的payload支持。

在src/avprofile.c中357行添加：
rtp_profile_set_payload(profile,96,&payload_type_h264);

3、配置和编译、安装
(1)进入ortp目录执行./autogen.sh

(2)错误1：./autogen.sh: line 44: libtoolize: command not found
   解决：sudo apt-get install libtool*
(2)错误2：libtoolize:   error: Please install GNU M4, or 'export M4=/path/to/gnu/m4'.
   解决：sudo apt-get install m4
(3)错误3：Automake - aclocal: command not found 
   解决：sudo apt-get install automake

运行结果：下面表示成功

+ aclocal
+ autoheader
+ automake --force-missing --add-missing --copy
configure.ac:41: installing './compile'
configure.ac:3: installing './config.guess'
configure.ac:3: installing './config.sub'
configure.ac:31: installing './install-sh'
configure.ac:31: installing './missing'
Makefile.am:20: warning: docdir was already defined in condition TRUE, which includes condition HAVE_DOXYGEN ...
configure.ac:2: ... 'docdir' previously defined here
Makefile.am:27: warning: <D: non-POSIX variable name
Makefile.am:60: warning: shell pwd: non-POSIX variable name
Makefile.am:60: (probably a GNU make extension)
src/Makefile.am:7: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
src/Makefile.am: installing './depcomp'
src/tests/Makefile.am:32: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
+ autoconf

(4)继续执行./configure --prefix=/tmp/ortp --host=arm-hisiv300-linux

--prefix：安装位置
--host：交叉编译工具链

(5)make && make install

4、到/tmp/ortp目录下查看移植好的库和头文件

[e-mail]:/tmp/ortp/lib$ ls
libortp.la  libortp.so  libortp.so.9  libortp.so.9.0.0  pkgconfig
[e-mail]:/tmp/ortp/lib$ cd ../include/
[e-mail]:/tmp/ortp/include$ ls
ortp
[e-mail]:/tmp/ortp/include$ cd ortp/
[e-mail]:/tmp/ortp/include/ortp$ ls
b64.h    logging.h  ortp_srtp.h    port.h  rtp.h         rtpsession.h sessionset.h  stun.h      telephonyevents.h
event.h  ortp.h     payloadtype.h  rtcp.h  rtpprofile.h  rtpsignaltable.h  str_utils.h   stun_udp.h  zrtp.h