新增 bitcode 支持.
iOS port of opencore-amr
Refer to README which is from original package. Refer to build_ios_xcode5.sh for build details. Please note arm64 and x86_64 requires Xcode 5 or higher. Current AppStore submission requires Xcode 6.
Build_ios_*.sh is modified from http://blog.csdn.net/favormm/article/details/6772097
Note that AMR-NB is for narrow band http://en.wikipedia.org/wiki/Adaptive_Multi-Rate_audio_codec
For AMR-WB encoding, refer to http://sourceforge.net/projects/opencore-amr/files/vo-amrwbenc/ or AMR Codecs as Shared Libraries http://www.penguin.cz/~utx/amr