wav和amr互转

苹果录音的格式为wav, 该格式文件体积较大(10秒100k左右), 为了缩小体积同时兼顾安卓, 可以将其转换成amr格式(能将100k缩小至10k左右, 安卓能播放amr格式, 苹果于ios4.3以后便不支持amr)

本文通过opencore-arm(下载最新库文件)将wav转换为amr

opencore-amr下载后

1.首先新建一个文件夹，将下载到的opencore-amr-0.1.5.tar.gz压缩包放到里面，然后进入这个文件夹，在里面创建build.sh文件(xcode中创建也可以),将以下脚本粘贴到文件里面

复制这段脚本时注意每行代码的后面不要有空格, 该段代码摘自大神大招致胜的博客, 由于第二个configure中没有 --host=arm-apple-darwin \ 导致编译不成功(本文已加)

#!/bin/sh    set -xe    VERSION="0.1.5"  SDKVERSION="10.3"  LIBSRCNAME="opencore-amr"    CURRENTPATH=`pwd`    mkdir -p "${CURRENTPATH}/src"  tar zxvf ${LIBSRCNAME}-${VERSION}.tar.gz -C "${CURRENTPATH}/src"  cd "${CURRENTPATH}/src/${LIBSRCNAME}-${VERSION}"    DEVELOPER=`xcode-select -print-path`  DEST="${CURRENTPATH}/lib-ios"  mkdir -p "${DEST}"    ARCHS="armv7 armv7s arm64 i386 x86_64"  # ARCHS="armv7"  LIBS="libopencore-amrnb.a libopencore-amrwb.a"    DEVELOPER=`xcode-select -print-path`    for arch in $ARCHS; do  case $arch in  arm*)    IOSV="-miphoneos-version-min=7.0"  if [ $arch == "arm64" ]  then  IOSV="-miphoneos-version-min=7.0"  fi    echo "Building for iOS $arch ****************"  SDKROOT="$(xcrun --sdk iphoneos --show-sdk-path)"  CC="$(xcrun --sdk iphoneos -f clang)"  CXX="$(xcrun --sdk iphoneos -f clang++)"  CPP="$(xcrun -sdk iphonesimulator -f clang++)"  CFLAGS="-isysroot $SDKROOT -arch $arch $IOSV -isystem $SDKROOT/usr/include -fembed-bitcode"  CXXFLAGS=$CFLAGS  CPPFLAGS=$CFLAGS  export CC CXX CFLAGS CXXFLAGS CPPFLAGS    ./configure \  --host=arm-apple-darwin \--prefix=$DEST \  --disable-shared --enable-static  ;;  *)  IOSV="-mios-simulator-version-min=7.0"  echo "Building for iOS $arch*****************"    SDKROOT=`xcodebuild -version -sdk iphonesimulator Path`  CC="$(xcrun -sdk iphoneos -f clang)"  CXX="$(xcrun -sdk iphonesimulator -f clang++)"  CPP="$(xcrun -sdk iphonesimulator -f clang++)"  CFLAGS="-isysroot $SDKROOT -arch $arch $IOSV -isystem $SDKROOT/usr/include -fembed-bitcode"  CXXFLAGS=$CFLAGS  CPPFLAGS=$CFLAGS  export CC CXX CFLAGS CXXFLAGS CPPFLAGS  ./configure \  --host=arm-apple-darwin \  --prefix=$DEST \  --disable-shared  ;;  esac  make > /dev/null  make install  make clean  for i in $LIBS; do  mv $DEST/lib/$i $DEST/lib/$i.$arch  done  done    for i in $LIBS; do  input=""  for arch in $ARCHS; do  input="$input $DEST/lib/$i.$arch"  done  lipo -create -output $DEST/lib/$i $input  done

2.修改build.sh的权限，打开终端，cd到新建的文件夹，使用命令 chmod  777 build.sh 修改权限.

3.修改完成之后在终端执行 ./build.sh 完成后如图

头文件

.a库(使用libopencore-amrnb.a, libopencore-amrwb.a)

demo(包括.sh文件, 已编译好的库, 转换代码)

参考博客: 

https://my.oschina.net/jeans/blog/69937

http://blog.csdn.net/devday/article/details/49357289

http://www.jianshu.com/p/f70a371c978d