一、废话
最近学习,第一步就是编译.我们需要编译FFmpag,x264,fdk_aac，下面是x264,网上说的很多都是几百年前的，我亲测完美可用
还是那句话 我能力有限，但是我希望我写的东西能够让更多的人能够接受.我也是刚刚接触.做一个记录，也希望能够对其他人有好处.
联系我可以直接评论，也可以加我QQ：11635423
准备：1.fdk_aac的源码 git clone https://android.googlesource.com/platform/external/aac
3.需要下载cmake 直接在cmd里面就可以了,之前的FFmpeg和x264都是cygwin里面的.现在不用.需要设置cmake环境变量,加入到path里面
4.编译脚本.这个脚本自己去理解吧.我也是一知半解--脚本名称：CMakeLists.txt
cmake_minimum_required ( VERSION 2.8 )
if (CMAKE_SYSTEM_NAME STREQUAL Android )
if ( NOT CMAKE_SYSTEM_PROCESSOR )
set ( CMAKE_SYSTEM_PROCESSOR armeabi-v7a )
endif ()
if ( NOT CMAKE_SYSTEM_VERSION )
set ( CMAKE_SYSTEM_VERSION 8 )
endif ()
if ( NOT NDK_TOOLCHAIN_VERSION)
set ( NDK_TOOLCHAIN_VERSION 4.8 )
endif ()
set ( ANDROID_NDK_ROOT $ENV{ANDROID_NDK_ROOT} )
find_path ( TOOLCHAIN_ROOT bin PATHS ${ANDROID_NDK_ROOT}/toolchains/arm-linux-androideabi-${NDK_TOOLCHAIN_VERSION}/prebuilt/* )
include ( CMakeForceCompiler )
find_program ( CMAKE_C_COMPILER arm-linux-androideabi-gcc PATHS ${TOOLCHAIN_ROOT}/bin )
find_program ( CMAKE_CXX_COMPILER arm-linux-androideabi-g++ PATHS ${TOOLCHAIN_ROOT}/bin )
find_program ( CMAKE_AR arm-linux-androideabi-ar PATHS ${TOOLCHAIN_ROOT}/bin )
cmake_force_c_compiler ( ${CMAKE_C_COMPILER} GNU )
cmake_force_cxx_compiler ( ${CMAKE_CXX_COMPILER} GNU )
set ( CMAKE_SYSROOT ${ANDROID_NDK_ROOT}/platforms/android-${CMAKE_SYSTEM_VERSION}/arch-arm CACHE PATH "" )
set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
endif ()
project ( fdk-aac )
if ( NOT INCLUDE_INSTALL_DIR )
set ( INCLUDE_INSTALL_DIR include )
endif ()
if ( NOT ARCHIVE_INSTALL_DIR )
set ( ARCHIVE_INSTALL_DIR lib/static )
endif ()
if ( NOT IS_DIRECTORY ${FDK_AAC_SOURCE_DIR} )
message ( FATAL_ERROR "FDK_AAC_SOURCE_DIR=${FDK_AAC_SOURCE_DIR} is not a dir" )
endif ()
if ( CMAKE_SYSTEM_NAME STREQUAL Android )
add_definitions (
--sysroot=${CMAKE_SYSROOT}
-fPIC
-march=armv7-a
-mfpu=vfpv3-d16
-DANDROID
-mhard-float
-D_NDK_MATH_NO_SOFTFP=1
-lm_hard )
endif ()
add_definitions (
-fno-rtti
-fno-exceptions )
set ( SOURCE_FILES )
foreach ( subdir
libAACdec libAACenc libFDK
libMpegTPDec libMpegTPEnc
libPCMutils
libSBRdec libSBRenc
libSYS )
set ( __inc_dir ${FDK_AAC_SOURCE_DIR}/${subdir}/include )
include_directories ( ${__inc_dir} )
install ( DIRECTORY ${__inc_dir}/ DESTINATION ${INCLUDE_INSTALL_DIR}/fdk-aac/ )
file ( GLOB __src_files
${FDK_AAC_SOURCE_DIR}/${subdir}/src/*.cpp
${FDK_AAC_SOURCE_DIR}/${subdir}/src/*.h )
list ( APPEND SOURCE_FILES ${__src_files} )
endforeach ()
add_library ( fdk-aac STATIC
${SOURCE_FILES} )
install ( TARGETS fdk-aac
ARCHIVE DESTINATION ${ARCHIVE_INSTALL_DIR} )
三、编译
这个的编译相对简单 ，只要下载cmake就可以了.直接cmake就可以了.
2.执行cmake 命令
cmake -G "MinGW Makefiles" -DCMAKE_SYSTEM_NAME=Andr
oid -DFDK_AAC_SOURCE_DIR="E:/soft/source/fdk_aac/aac" E:\qupai_code_eclipse\code
\ThirdParty\Build\fdk-aac -DCMAKE_MAKE_PROGRAM=E:\android-ndk-r9c\prebuilt\windo
ws\bin\make.exe
注意：DFDK_AAC_SOURCE_DIR="你的fdk_aac的源码地址"
E:\qupai_code_eclipse\code\ThirdParty\Build\fdk-aac ----这里是你的CMakeLists.txt地址
DCMAKE_MAKE_PROGRAM=NDK的make地址