Ubuntu交叉编译Lame库到Android
本次交叉编译是在Ubuntu20.4上进行的。
一、下载lame的源码：
进入官网：https://sourceforge.net/projects/lame/files/lame/
选择3.100版本的
在ubuntu解压lame：
tar -xzf lame-3.100.tar.gz二、下载及安装NDK：
在NDK 下载NDK 下载 | Android NDK | Android Developers下载Liunx平台的NDK。
本次交叉编译下载的android-ndk-r28c-linux.zip版本的。
下载解压后安装，具体的过程在前面的文章已经做介绍，需要的可详细查看文章：
三、创建脚本android_lame_build.sh：
进入lame-3.100的文件下创建android_lame_build.sh。
android_lame_build.sh编译脚本代码如下：
#!/bin/bash
# 设置变量
NDK_HOME=/home/wyy/Android/android-ndk-r28c
SYSTEM=linux-x86_64
#HOST=aarch64-linux-android
#ARCH=arm64-v8a
API=24
TOOLCHAIN=${NDK_HOME}/toolchains/llvm/prebuilt/${SYSTEM}
# 目标架构 (可修改为: arm-v7a arm64-v8a x86 x86_64)
ARCH=${1:-"arm-v7a"}
#ARCH=${1:-"arm64-v8a"}
# 设置目标架构相关参数
case $ARCH in
arm-v7a)
HOST="armv7a-linux-androideabi"
ARCH="armeabi-v7a"
CPU="armv7-a"
;;
arm64-v8a)
HOST="aarch64-linux-android"
ARCH="arm64-v8a"
CPU="armv8-a"
;;
x86)
HOST="i686-linux-android"
ABI="x86"
CPU="i686"
;;
x86_64)
HOST="x86_64-linux-android"
ARCH="x86_64"
CPU="x86-64"
;;
*)
echo "不支持的架构: $ARCH"
echo "支持的架构: arm-v7a, arm64-v8a, x86, x86_64"
exit 1
;;
esac
# 输出目录
PREFIX="$(pwd)/android-build/${ARCH}"
mkdir -p ${PREFIX}
# 设置工具链
export AR=${TOOLCHAIN}/bin/llvm-ar
export CC=${TOOLCHAIN}/bin/${HOST}${API}-clang
export CXX=${TOOLCHAIN}/bin/${HOST}${API}-clang++
export LD=${TOOLCHAIN}/bin/ld
export AS=${CC}
export RANLIB=${TOOLCHAIN}/bin/llvm-ranlib
export STRIP=${TOOLCHAIN}/bin/llvm-strip
# 设置编译标志
export CFLAGS="-fPIC -O3"
export LDFLAGS="-pie"
echo "配置 LAME for Android ${ARCH}..."
./configure \
--host=${HOST} \
--target=${HOST} \
--enable-shared \
--enable-static \
--prefix=${PREFIX} \
--disable-frontend # 禁用前端程序(不需要用于Android)
if [ $? -ne 0 ]; then
echo "配置失败!"
exit 1
fi
# 修复版本脚本问题 - 移除对未定义符号的引用
echo "修复版本脚本问题..."
if [ -f "include/libmp3lame.sym" ]; then
# 移除对 lame_init_old 的引用
sed -i '/lame_init_old/d' include/libmp3lame.sym
echo "已修复 include/libmp3lame.sym"
fi
echo "编译 LAME..."
make clean
make -j$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)
if [ $? -ne 0 ]; then
echo "编译失败!"
# 如果仍然失败，尝试禁用版本脚本
echo "尝试禁用版本脚本..."
make clean
# 重新配置，禁用版本脚本
./configure \
--host=${HOST} \
--target=${HOST} \
--enable-shared \
--enable-static \
--prefix=${PREFIX} \
--disable-frontend \
--disable-version-script # 禁用版本脚本
make -j$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || echo 4)
if [ $? -ne 0 ]; then
echo "仍然编译失败!"
exit 1
fi
fi
echo "安装 LAME 到 ${PREFIX}..."
make install
if [ $? -ne 0 ]; then
echo "安装失败!"
exit 1
fi
echo "LAME 已成功编译并安装到 ${PREFIX}"
四、编译android_lame_build.sh：
修改脚本的代码分别对arm-v7a、arm64-v8a架构编译：
# 目标架构 (可修改为: arm-v7a arm64-v8a x86 x86_64)
ARCH=${1:-"arm-v7a"}
#ARCH=${1:-"arm64-v8a"}sh编译脚本：
sudo sh android_lame_build.sh 
五、编译结果：
编译完成后在android-buildw文件夹下生成arm-v7a、arm64-v8a两个架构的编译结果：
六、在编译FFmpeg过程中加入第三方lame库编译：
此次编译是基于文章 Ubuntu系统下交叉编译Android的X264库 的android_x264_build.sh基础上进行改造编译的，感兴趣的可以翻回去回顾一下具体内容。
#!/bin/bash
# 用于编译android平台的脚本
# NDK所在目录
NDK_PATH=/home/wyy/Android/android-ndk-r28c
# 主机平台
HOST_PLATFORM=linux-x86_64
# minSdkVersion
API=24 # 提高到 API 24 以避免 fseeko64/ftello64 问题
TOOLCHAINS="$NDK_PATH/toolchains/llvm/prebuilt/$HOST_PLATFORM"
SYSROOT="$NDK_PATH/toolchains/llvm/prebuilt/$HOST_PLATFORM/sysroot"
# 生成 -fpic 与位置无关的代码
CFLAG="-D__ANDROID_API__=$API -Os -fPIC -DANDROID -D_FILE_OFFSET_BITS=64"
LDFLAG="-lc -lm -ldl -llog "
# 输出目录
PREFIX=$(pwd)/android_build
# 日志输出目录
CONFIG_LOG_PATH=${PREFIX}/log
# 公共配置
COMMON_OPTIONS=
# 交叉配置
CONFIGURATION=
# 第三方库路径
X264_BASE_PATH="/home/wyy/X264/x264/android_build"
LAME_BASE_PATH="/home/wyy/mp3lame/lame-3.100/android-build"
# 创建必要的目录
mkdir -p ${PREFIX} ${CONFIG_LOG_PATH}
build() {
APP_ABI=$1
echo "======== > Start build $APP_ABI"
# 重置变量
EXTRA_CFLAGS="$CFLAG"
EXTRA_LDFLAGS="$LDFLAG"
EXTRA_OPTIONS=""
case ${APP_ABI} in
armeabi-v7a)
ARCH="arm"
CPU="armv7-a"
MARCH="armv7-a"
TARGET=armv7a-linux-androideabi
CC="$TOOLCHAINS/bin/$TARGET$API-clang"
CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
LD="$TOOLCHAINS/bin/$TARGET$API-clang"
# 交叉编译工具前缀
CROSS_PREFIX="$TOOLCHAINS/bin/arm-linux-androideabi-"
# 设置架构特定路径
X264_ARCH_PATH="$X264_BASE_PATH/arm-v7a"
LAME_ARCH_PATH="$LAME_BASE_PATH/armeabi-v7a"
# 添加架构特定标志
EXTRA_CFLAGS="$EXTRA_CFLAGS -mfloat-abi=softfp -mfpu=neon -marm -march=$MARCH"
EXTRA_OPTIONS="--enable-neon --cpu=$CPU"
;;
arm64-v8a)
ARCH="aarch64"
CPU="armv8-a"
TARGET=aarch64-linux-android
CC="$TOOLCHAINS/bin/$TARGET$API-clang"
CXX="$TOOLCHAINS/bin/$TARGET$API-clang++"
LD="$TOOLCHAINS/bin/$TARGET$API-clang"
CROSS_PREFIX="$TOOLCHAINS/bin/aarch64-linux-android-"
# 设置架构特定路径
X264_ARCH_PATH="$X264_BASE_PATH/arm64-v8a"
LAME_ARCH_PATH="$LAME_BASE_PATH/arm64-v8a"
;;
esac
# 设置x264和lame的路径
X264_INCLUDE="$X264_ARCH_PATH/include"
X264_LIB="$X264_ARCH_PATH/lib"
LAME_INCLUDE="$LAME_ARCH_PATH/include"
LAME_LIB="$LAME_ARCH_PATH/lib"
echo "-------- > X264_INCLUDE: $X264_INCLUDE"
echo "-------- > X264_LIB: $X264_LIB"
echo "-------- > LAME_INCLUDE: $LAME_INCLUDE"
echo "-------- > LAME_LIB: $LAME_LIB"
# 检查x264库是否存在
if [ ! -f "$X264_LIB/libx264.so" ]; then
echo "错误: 找不到x264共享库文件在 $X264_LIB"
echo "请先编译x264库或检查路径是否正确"
return 1
fi
# 检查lame库是否存在
if [ ! -f "$LAME_LIB/libmp3lame.so" ]; then
echo "错误: 找不到mp3lame共享库文件在 $LAME_LIB"
echo "请先编译mp3lame库或检查路径是否正确"
return 1
fi
# 设置pkg-config路径
export PKG_CONFIG_PATH="$X264_LIB/pkgconfig:$LAME_LIB/pkgconfig"
# 尝试使用pkg-config获取x264标志
if pkg-config --exists x264; then
X264_CFLAGS=$(pkg-config --cflags x264)
X264_LIBS=$(pkg-config --libs x264)
echo "-------- > 使用pkg-config获取x264标志"
else
echo "-------- > pkg-config找不到x264，使用手动标志"
X264_CFLAGS="-I$X264_INCLUDE"
X264_LIBS="-L$X264_LIB -lx264"
fi
# 添加x264和lame标志
EXTRA_CFLAGS="$EXTRA_CFLAGS $X264_CFLAGS -I$LAME_INCLUDE"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS $X264_LIBS -L$LAME_LIB -lmp3lame"
echo "-------- > Start clean workspace"
make clean > /dev/null 2>&1
echo "-------- > Start build configuration"
CONFIGURATION="$COMMON_OPTIONS"
CONFIGURATION="$CONFIGURATION --logfile=$CONFIG_LOG_PATH/config_$APP_ABI.log"
CONFIGURATION="$CONFIGURATION --prefix=$PREFIX"
CONFIGURATION="$CONFIGURATION --libdir=$PREFIX/libs/$APP_ABI"
CONFIGURATION="$CONFIGURATION --incdir=$PREFIX/includes/$APP_ABI"
CONFIGURATION="$CONFIGURATION --pkgconfigdir=$PREFIX/pkgconfig/$APP_ABI"
CONFIGURATION="$CONFIGURATION --cross-prefix=$CROSS_PREFIX"
CONFIGURATION="$CONFIGURATION --arch=$ARCH"
CONFIGURATION="$CONFIGURATION --sysroot=$SYSROOT"
CONFIGURATION="$CONFIGURATION --cc=$CC"
CONFIGURATION="$CONFIGURATION --cxx=$CXX"
CONFIGURATION="$CONFIGURATION --ld=$LD"
# nm 和 strip
CONFIGURATION="$CONFIGURATION --nm=$TOOLCHAINS/bin/llvm-nm"
CONFIGURATION="$CONFIGURATION --strip=$TOOLCHAINS/bin/llvm-strip"
CONFIGURATION="$CONFIGURATION $EXTRA_OPTIONS"
echo "-------- > Start config makefile with $CONFIGURATION"
echo "-------- > Extra CFLAGS: $EXTRA_CFLAGS"
echo "-------- > Extra LDFLAGS: $EXTRA_LDFLAGS"
./configure ${CONFIGURATION} \
--extra-cflags="$EXTRA_CFLAGS" \
--extra-ldflags="$EXTRA_LDFLAGS" \
--pkg-config=$(which pkg-config) 2>&1 | tee $CONFIG_LOG_PATH/configure_$APP_ABI.log
# 检查configure是否成功
if [ $? -ne 0 ]; then
echo "-------- > Configure failed for $APP_ABI"
return 1
fi
echo "-------- > Start make $APP_ABI with -j4"
make -j4
if [ $? -ne 0 ]; then
echo "-------- > Make failed for $APP_ABI"
return 1
fi
echo "-------- > Start install $APP_ABI"
make install
if [ $? -ne 0 ]; then
echo "-------- > Install failed for $APP_ABI"
return 1
fi
echo "++++++++ > make and install $APP_ABI complete."
return 0
}
build_all() {
#配置开源协议声明
COMMON_OPTIONS="$COMMON_OPTIONS --enable-gpl"
#目标android平台
COMMON_OPTIONS="$COMMON_OPTIONS --target-os=android"
#取消默认的静态库
COMMON_OPTIONS="$COMMON_OPTIONS --disable-static"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-shared"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-protocols"
#开启交叉编译
COMMON_OPTIONS="$COMMON_OPTIONS --enable-cross-compile"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-optimizations"
COMMON_OPTIONS="$COMMON_OPTIONS --disable-debug"
#尽可能小
COMMON_OPTIONS="$COMMON_OPTIONS --enable-small"
COMMON_OPTIONS="$COMMON_OPTIONS --disable-doc"
#不要命令（执行文件）
COMMON_OPTIONS="$COMMON_OPTIONS --disable-programs" # do not build command line programs
COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffmpeg" # disable ffmpeg build
COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffplay" # disable ffplay build
COMMON_OPTIONS="$COMMON_OPTIONS --disable-ffprobe" # disable ffprobe build
COMMON_OPTIONS="$COMMON_OPTIONS --disable-symver"
COMMON_OPTIONS="$COMMON_OPTIONS --disable-network"
COMMON_OPTIONS="$COMMON_OPTIONS --disable-x86asm"
COMMON_OPTIONS="$COMMON_OPTIONS --disable-vulkan"
# 有条件地禁用asm，某些架构可能不支持
COMMON_OPTIONS="$COMMON_OPTIONS --disable-asm"
#启用
COMMON_OPTIONS="$COMMON_OPTIONS --enable-pthreads"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-mediacodec"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-jni"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-zlib"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-pic"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-muxer=flv"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=h264"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=mpeg4"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=mjpeg"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=png"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=vorbis"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=opus"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-decoder=flac"
#启用编码器
COMMON_OPTIONS="$COMMON_OPTIONS --enable-encoder=h264"
#libx264
COMMON_OPTIONS="$COMMON_OPTIONS --enable-libx264"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-encoder=libx264"
#mp3lame
COMMON_OPTIONS="$COMMON_OPTIONS --enable-libmp3lame"
COMMON_OPTIONS="$COMMON_OPTIONS --enable-encoder=libmp3lame"
echo "COMMON_OPTIONS=$COMMON_OPTIONS"
echo "PREFIX=$PREFIX"
echo "CONFIG_LOG_PATH=$CONFIG_LOG_PATH"
# 构建所有支持的架构
build "armeabi-v7a" || echo "Failed to build armeabi-v7a"
# build "arm64-v8a" || echo "Failed to build arm64-v8a"
}
echo "-------- Start --------"
build_all
echo "-------- End --------"七、编译结果的验证：
在本人github项目中可验证lame是否编译到ffmpeg中：
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