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https://chromium.googlesource.com/libyuv/libyuv
synced 2025-12-11 22:19:56 +08:00
Compute chroma using negative coefficients to extend range of U contribution on B to 2
BUG=324 TESTED=TestI420 R=tpsiaki@google.com Review URL: https://webrtc-codereview.appspot.com/41569004 git-svn-id: http://libyuv.googlecode.com/svn/trunk@1238 16f28f9a-4ce2-e073-06de-1de4eb20be90
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fbarchard@google.com
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319f047710
@ -1,6 +1,6 @@
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Name: libyuv
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URL: http://code.google.com/p/libyuv/
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Version: 1237
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Version: 1238
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License: BSD
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License File: LICENSE
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@ -11,6 +11,6 @@
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#ifndef INCLUDE_LIBYUV_VERSION_H_ // NOLINT
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#define INCLUDE_LIBYUV_VERSION_H_
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#define LIBYUV_VERSION 1237
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#define LIBYUV_VERSION 1238
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#endif // INCLUDE_LIBYUV_VERSION_H_ NOLINT
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@ -961,31 +961,42 @@ void I400ToARGBRow_C(const uint8* src_y, uint8* dst_argb, int width) {
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}
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// C reference code that mimics the YUV assembly.
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#define YG 19071 /* round(1.164 * 64 * 256) */
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#define YGB 1192 /* round(1.164 * 64 * 16) */
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#define UB 127 /* min(127, round(2.018 * 64)) */
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#define UG -25 /* round(-0.391 * 64) */
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#define UB -128 /* -min(128, round(2.018 * 64)) */
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#define UG 25 /* -round(-0.391 * 64) */
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#define UR 0
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#define VB 0
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#define VG -52 /* round(-0.813 * 64) */
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#define VR 102 /* round(1.596 * 64) */
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#define VG 52 /* -round(-0.813 * 64) */
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#define VR -102 /* -round(1.596 * 64) */
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// Bias
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#define BB (UB * 128 + VB * 128 + YGB)
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#define BG (UG * 128 + VG * 128 + YGB)
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#define BR (UR * 128 + VR * 128 + YGB)
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#define BB (UB * 128 + VB * 128 - YGB)
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#define BG (UG * 128 + VG * 128 - YGB)
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#define BR (UR * 128 + VR * 128 - YGB)
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static __inline void YuvPixel(uint8 y, uint8 u, uint8 v,
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uint8* b, uint8* g, uint8* r) {
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uint32 y1 = (uint32)(y * 0x0101 * YG) >> 16;
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*b = Clamp((int32)(u * UB + v * VB + y1 - BB) >> 6);
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*g = Clamp((int32)(u * UG + v * VG + y1 - BG) >> 6);
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*r = Clamp((int32)(u * UR + v * VR + y1 - BR) >> 6);
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*b = Clamp((int32)(y1 - (v * VB + u * UB) + BB) >> 6);
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*g = Clamp((int32)(y1 - (v * VG + u * UG) + BG) >> 6);
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*r = Clamp((int32)(y1 - (v * VR + u * UR) + BR) >> 6);
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}
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#undef YG
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#undef YGB
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#undef UB
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#undef UG
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#undef UR
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#undef VB
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#undef VG
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#undef VR
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#undef BB
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#undef BG
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#undef BR
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#if !defined(LIBYUV_DISABLE_NEON) && \
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(defined(__ARM_NEON__) || defined(__aarch64__) || defined(LIBYUV_NEON))
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// C mimic assembly.
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@ -24,21 +24,22 @@ extern "C" {
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#if !defined(LIBYUV_DISABLE_X86) && defined(_MSC_VER) && \
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(defined(_M_IX86) || defined(_M_X64))
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// C reference code that mimics the YUV assembly.
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#define YG 19071 /* round(1.164 * 64 * 256) */
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#define YGB 1192 /* round(1.164 * 64 * 16) */
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#define UB 127 /* min(63,(int8)round(2.018 * 64)) */
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#define UG -25 /* (int8)round(-0.391 * 64 - 0.5) */
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#define UB -128 /* -min(128, round(2.018 * 64)) */
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#define UG 25 /* -round(-0.391 * 64) */
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#define UR 0
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#define VB 0
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#define VG -52 /* (int8)round(-0.813 * 64 - 0.5) */
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#define VR 102 /* (int8)round(1.596 * 64 + 0.5) */
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#define VG 52 /* -round(-0.813 * 64) */
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#define VR -102 /* -round(1.596 * 64) */
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// Bias
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#define BB (UB * 128 + VB * 128 + YGB)
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#define BG (UG * 128 + VG * 128 + YGB)
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#define BR (UR * 128 + VR * 128 + YGB)
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#define BB (UB * 128 + VB * 128 - YGB)
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#define BG (UG * 128 + VG * 128 - YGB)
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#define BR (UR * 128 + VR * 128 - YGB)
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static const vec8 kUVToB = {
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UB, VB, UB, VB, UB, VB, UB, VB, UB, VB, UB, VB, UB, VB, UB, VB
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@ -1514,9 +1515,12 @@ static const lvec16 kUVBiasR_AVX = {
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__asm vpmaddubsw ymm2, ymm0, kUVToR_AVX /* scale R UV */ \
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__asm vpmaddubsw ymm1, ymm0, kUVToG_AVX /* scale G UV */ \
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__asm vpmaddubsw ymm0, ymm0, kUVToB_AVX /* scale B UV */ \
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__asm vpsubw ymm2, ymm2, kUVBiasR_AVX /* unbias back to signed */ \
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__asm vpsubw ymm1, ymm1, kUVBiasG_AVX \
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__asm vpsubw ymm0, ymm0, kUVBiasB_AVX \
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__asm vmovdqu ymm3, kUVBiasR_AVX \
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__asm vpsubw ymm2, ymm3, ymm2 \
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__asm vmovdqu ymm3, kUVBiasG_AVX \
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__asm vpsubw ymm1, ymm3, ymm1 \
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__asm vmovdqu ymm3, kUVBiasB_AVX \
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__asm vpsubw ymm0, ymm3, ymm0 \
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/* Step 2: Find Y contribution to 16 R,G,B values */ \
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__asm vmovdqu xmm3, [eax] /* NOLINT */ \
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__asm lea eax, [eax + 16] \
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@ -1761,12 +1765,16 @@ void I422ToABGRRow_AVX2(const uint8* y_buf,
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/* Step 1: Find 4 UV contributions to 8 R,G,B values */ \
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__asm movdqa xmm1, xmm0 \
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__asm movdqa xmm2, xmm0 \
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__asm pmaddubsw xmm0, kUVToB /* scale B UV */ \
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__asm pmaddubsw xmm1, kUVToG /* scale G UV */ \
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__asm pmaddubsw xmm2, kUVToR /* scale R UV */ \
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__asm psubw xmm0, kUVBiasB /* unbias back to signed */ \
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__asm psubw xmm1, kUVBiasG \
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__asm psubw xmm2, kUVBiasR \
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__asm movdqa xmm3, xmm0 \
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__asm movdqa xmm0, kUVBiasB /* unbias back to signed */ \
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__asm pmaddubsw xmm1, kUVToB /* scale B UV */ \
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__asm psubw xmm0, xmm1 \
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__asm movdqa xmm1, kUVBiasG \
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__asm pmaddubsw xmm2, kUVToG /* scale G UV */ \
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__asm psubw xmm1, xmm2 \
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__asm movdqa xmm2, kUVBiasR \
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__asm pmaddubsw xmm3, kUVToR /* scale R UV */ \
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__asm psubw xmm2, xmm3 \
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/* Step 2: Find Y contribution to 8 R,G,B values */ \
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__asm movq xmm3, qword ptr [eax] /* NOLINT */ \
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__asm lea eax, [eax + 8] \
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@ -1788,12 +1796,16 @@ void I422ToABGRRow_AVX2(const uint8* y_buf,
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/* Step 1: Find 4 UV contributions to 8 R,G,B values */ \
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__asm movdqa xmm1, xmm0 \
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__asm movdqa xmm2, xmm0 \
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__asm pmaddubsw xmm0, kVUToB /* scale B UV */ \
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__asm pmaddubsw xmm1, kVUToG /* scale G UV */ \
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__asm pmaddubsw xmm2, kVUToR /* scale R UV */ \
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__asm psubw xmm0, kUVBiasB /* unbias back to signed */ \
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__asm psubw xmm1, kUVBiasG \
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__asm psubw xmm2, kUVBiasR \
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__asm movdqa xmm3, xmm0 \
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__asm movdqa xmm0, kUVBiasB /* unbias back to signed */ \
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__asm pmaddubsw xmm1, kVUToB /* scale B UV */ \
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__asm psubw xmm0, xmm1 \
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__asm movdqa xmm1, kUVBiasG \
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__asm pmaddubsw xmm2, kVUToG /* scale G UV */ \
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__asm psubw xmm1, xmm2 \
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__asm movdqa xmm2, kUVBiasR \
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__asm pmaddubsw xmm3, kVUToR /* scale R UV */ \
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__asm psubw xmm2, xmm3 \
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/* Step 2: Find Y contribution to 8 R,G,B values */ \
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__asm movq xmm3, qword ptr [eax] /* NOLINT */ \
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__asm lea eax, [eax + 8] \
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