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use same macros as row_gcc.cc

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R=harryjin@google.com
BUG=libyuv:488

Review URL: https://codereview.chromium.org/1343863002 .
This commit is contained in:
Frank Barchard 2015-09-14 15:36:10 -07:00
parent fcacbfb27f
commit 909160b3b5
1 changed files with 21 additions and 14 deletions
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35
source/row_neon.cc
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@ -134,32 +134,39 @@ extern "C" {
"vqshrun.s16 d22, q9, #6 \n" /* R */ \
"vqshrun.s16 d21, q0, #6 \n" /* G */
// YUV to RGB conversion constants.
// BT.601 YUV to RGB reference
// R = (Y - 16) * 1.164 - V * -1.596
// G = (Y - 16) * 1.164 - U * 0.391 - V * 0.813
// B = (Y - 16) * 1.164 - U * -2.018
// Y contribution to R,G,B. Scale and bias.
// TODO(fbarchard): Consider moving constants into a common header.
#define YG 18997 /* round(1.164 * 64 * 256 * 256 / 257) */
#define YGB 1160 /* 1.164 * 64 * 16 - adjusted for even error distribution */
#define YGB -1160 /* 1.164 * 64 * -16 + 64 / 2 */
// U and V contributions to R,G,B.
#define UB -128 /* -min(128, round(2.018 * 64)) */
#define UG 25 /* -round(-0.391 * 64) */
#define VG 52 /* -round(-0.813 * 64) */
#define VR -102 /* -round(1.596 * 64) */
#define UB -128 /* max(-128, round(-2.018 * 64)) */
#define UG 25 /* round(0.391 * 64) */
#define VG 52 /* round(0.813 * 64) */
#define VR -102 /* round(-1.596 * 64) */
// Bias values to subtract 16 from Y and 128 from U and V.
#define BB (UB * 128 - YGB)
#define BG (UG * 128 + VG * 128 - YGB)
#define BR (VR * 128 - YGB)
#define BB (UB * 128 + YGB)
#define BG (UG * 128 + VG * 128 + YGB)
#define BR (VR * 128 + YGB)
YuvConstantsNEON SIMD_ALIGNED(kYuvConstantsNEON) = {
{ 128, 128, 128, 128, 102, 102, 102, 102, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 25, 25, 25, 25, 52, 52, 52, 52, 0, 0, 0, 0, 0, 0, 0, 0 },
{ -UB, -UB, -UB, -UB, -VR, -VR, -VR, -VR, 0, 0, 0, 0, 0, 0, 0, 0 },
{ UG, UG, UG, UG, VG, VG, VG, VG, 0, 0, 0, 0, 0, 0, 0, 0 },
{ BB, BG, BR, 0, 0, 0, 0, 0 },
{ 0x0101 * YG, 0, 0, 0 }
};
static uvec8 kUVToRB = { 128, 128, 128, 128, 102, 102, 102, 102,
0, 0, 0, 0, 0, 0, 0, 0 };
static uvec8 kUVToG = { 25, 25, 25, 25, 52, 52, 52, 52,
// TODO(fbarchard): replace these with structure.
static uvec8 kUVToRB = { -UB, -UB, -UB, -UB, -VR, -VR, -VR, -VR,
0, 0, 0, 0, 0, 0, 0, 0 },
static uvec8 kUVToG = { UG, UG, UG, UG, VG, VG, VG, VG,
0, 0, 0, 0, 0, 0, 0, 0 };
static vec16 kUVBiasBGR = { BB, BG, BR, 0, 0, 0, 0, 0 };
static vec32 kYToRgb = { 0x0101 * YG, 0, 0, 0 };