ref: babbd5d170d080ea69c602a7ab8b824a27aaa0a2
parent: 5a18106fb7829ecb2a6f8413ff5c34fc6419ea6e
author: Jingning Han <jingning@google.com>
date: Wed Feb 13 04:03:21 EST 2013
Forward butterfly hybrid transform This patch includes 4x4, 8x8, and 16x16 forward butterfly ADST/DCT hybrid transform. The kernel of 4x4 ADST is sin((2k+1)*(n+1)/(2N+1)). The kernel of 8x8/16x16 ADST is of the form sin((2k+1)*(2n+1)/4N). Change-Id: I8f1ab3843ce32eb287ab766f92e0611e1c5cb4c1