Download patch
ref: 1f7f82bad48999805d1ee90f44848c5436c6cc1c parent: 5c1c1c834748e95d93643e471a372fc5e82d305c author: Licai Guo <guolicai@gmail.com> date: Fri Feb 21 08:49:49 EST 2014
Add ios support for encoder.