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Use post bias to adjust for Y - 16 to improve performance.

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BUG=388
TESTED=set LIBYUV_DISABLE_ASM=1 out\release\libyuv_unittest --gtest_catch_exceptions=0 --gtest_filter=*I420ToARGB_Opt
R=brucedawson@google.com, harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/35609004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1213 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
fbarchard@google.com 2014-12-30 00:02:06 +00:00
parent 40e3457574
commit 5304aaaed1
1 changed files with 24 additions and 24 deletions
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48
source/row_common.cc
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@ -940,27 +940,27 @@ void I400ToARGBRow_C(const uint8* src_y, uint8* dst_argb, int width) {
// C reference code that mimics the YUV assembly.
#define YG 74 /* (int8)(1.164 * 64 + 0.5) */
#define YG 74 /* (int8)round(1.164 * 64 + 0.5) */
#define UB 127 /* min(63,(int8)(2.018 * 64)) */
#define UG -25 /* (int8)(-0.391 * 64 - 0.5) */
#define UB 127 /* min(63,(int8)round(2.018 * 64)) */
#define UG -25 /* (int8)round(-0.391 * 64 - 0.5) */
#define UR 0
#define VB 0
#define VG -52 /* (int8)(-0.813 * 64 - 0.5) */
#define VR 102 /* (int8)(1.596 * 64 + 0.5) */
#define VG -52 /* (int8)round(-0.813 * 64 - 0.5) */
#define VR 102 /* (int8)round(1.596 * 64 + 0.5) */
// Bias
#define BB UB * 128 + VB * 128
#define BG UG * 128 + VG * 128
#define BR UR * 128 + VR * 128
#define BB (UB * 128 + VB * 128 + YG * 16)
#define BG (UG * 128 + VG * 128 + YG * 16)
#define BR (UR * 128 + VR * 128 + YG * 16)
static __inline void YuvPixel(uint8 y, uint8 u, uint8 v,
uint8* b, uint8* g, uint8* r) {
int32 y1 = ((int32)(y) - 16) * YG;
*b = Clamp((int32)((u * UB + v * VB) - (BB) + y1) >> 6);
*g = Clamp((int32)((u * UG + v * VG) - (BG) + y1) >> 6);
*r = Clamp((int32)((u * UR + v * VR) - (BR) + y1) >> 6);
uint32 y1 = (uint32)(y * YG);
*b = Clamp((int32)(u * UB + v * VB + y1 - BB) >> 6);
*g = Clamp((int32)(u * UG + v * VG + y1 - BG) >> 6);
*r = Clamp((int32)(u * UR + v * VR + y1 - BR) >> 6);
}
#if !defined(LIBYUV_DISABLE_NEON) && \
@ -1040,27 +1040,27 @@ void I422ToARGBRow_C(const uint8* src_y,
// * G = Y - 0.34414 * Cb - 0.71414 * Cr
// * B = Y + 1.77200 * Cb
#define YGJ 64 /* (int8)(1.000 * 64) */
#define YGJ 64 /* (int8)round(1.000 * 64) */
#define UBJ 113 /* (int8)(1.772 * 64) */
#define UGJ -22 /* (int8)(-0.34414 * 64) */
#define UBJ 113 /* (int8)round(1.772 * 64) */
#define UGJ -22 /* (int8)round(-0.34414 * 64) */
#define URJ 0
#define VBJ 0
#define VGJ -46 /* (int8)(-0.71414 * 64) */
#define VRJ 90 /* (int8)(1.402 * 64) */
#define VGJ -46 /* (int8)round(-0.71414 * 64) */
#define VRJ 90 /* (int8)round(1.402 * 64) */
// Bias
#define BBJ UBJ * 128 + VBJ * 128
#define BGJ UGJ * 128 + VGJ * 128
#define BRJ URJ * 128 + VRJ * 128
#define BBJ (UBJ * 128 + VBJ * 128)
#define BGJ (UGJ * 128 + VGJ * 128)
#define BRJ (URJ * 128 + VRJ * 128)
static __inline void YuvJPixel(uint8 y, uint8 u, uint8 v,
uint8* b, uint8* g, uint8* r) {
int32 y1 = ((int32)(y)) * YGJ;
*b = Clamp((int32)((u * UBJ + v * VBJ) - (BBJ) + y1) >> 6);
*g = Clamp((int32)((u * UGJ + v * VGJ) - (BGJ) + y1) >> 6);
*r = Clamp((int32)((u * URJ + v * VRJ) - (BRJ) + y1) >> 6);
uint32 y1 = (uint32)(y * YGJ);
*b = Clamp((int32)(u * UBJ + v * VBJ + y1 - BBJ) >> 6);
*g = Clamp((int32)(u * UGJ + v * VGJ + y1 - BGJ) >> 6);
*r = Clamp((int32)(u * URJ + v * VRJ + y1 - BRJ) >> 6);
}
void J422ToARGBRow_C(const uint8* src_y,