Special handle on DC only inverse 8x8 2D-DCT
authorJingning Han <jingning@google.com>
Fri, 26 Jul 2013 21:11:37 +0000 (14:11 -0700)
committerJingning Han <jingning@google.com>
Fri, 26 Jul 2013 21:16:51 +0000 (14:16 -0700)
commit325e0aa6505eb480f5a55e072e195cbc3db0aacf
treef9ca4cd8e73ec48217cf2de27583846da8d32fba
parent52256cdbcaf07e637c964f92671dfc82321f2125
Special handle on DC only inverse 8x8 2D-DCT

This commit enables a special handle for the 8x8 inverse 2D-DCT,
where only DC coefficient is quantized to be non-zero. For bus_cif
at 2000 kbps, it provides about 1% speed-up at speed 0.

Change-Id: I2523222359eec26b144cf8fd4c63a4ad63b1b011
vp9/common/vp9_idct.c
vp9/common/vp9_rtcd_defs.sh
vp9/common/x86/vp9_idct_intrin_sse2.c
vp9/decoder/vp9_idct_blk.c
vp9/encoder/vp9_encodemb.c