776 lines
28 KiB
C
776 lines
28 KiB
C
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// YUV->RGB conversion functions
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//
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// Author: Skal (pascal.massimino@gmail.com)
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#include "./yuv.h"
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#if defined(WEBP_USE_SSE2)
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#include <emmintrin.h>
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//-----------------------------------------------------------------------------
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// Convert spans of 32 pixels to various RGB formats for the fancy upsampler.
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// These constants are 14b fixed-point version of ITU-R BT.601 constants.
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// R = (19077 * y + 26149 * v - 14234) >> 6
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// G = (19077 * y - 6419 * u - 13320 * v + 8708) >> 6
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// B = (19077 * y + 33050 * u - 17685) >> 6
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static void ConvertYUV444ToRGB(const __m128i* const Y0,
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const __m128i* const U0,
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const __m128i* const V0,
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__m128i* const R,
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__m128i* const G,
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__m128i* const B) {
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const __m128i k19077 = _mm_set1_epi16(19077);
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const __m128i k26149 = _mm_set1_epi16(26149);
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const __m128i k14234 = _mm_set1_epi16(14234);
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// 33050 doesn't fit in a signed short: only use this with unsigned arithmetic
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const __m128i k33050 = _mm_set1_epi16((short)33050);
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const __m128i k17685 = _mm_set1_epi16(17685);
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const __m128i k6419 = _mm_set1_epi16(6419);
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const __m128i k13320 = _mm_set1_epi16(13320);
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const __m128i k8708 = _mm_set1_epi16(8708);
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const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077);
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const __m128i R0 = _mm_mulhi_epu16(*V0, k26149);
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const __m128i R1 = _mm_sub_epi16(Y1, k14234);
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const __m128i R2 = _mm_add_epi16(R1, R0);
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const __m128i G0 = _mm_mulhi_epu16(*U0, k6419);
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const __m128i G1 = _mm_mulhi_epu16(*V0, k13320);
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const __m128i G2 = _mm_add_epi16(Y1, k8708);
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const __m128i G3 = _mm_add_epi16(G0, G1);
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const __m128i G4 = _mm_sub_epi16(G2, G3);
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// be careful with the saturated *unsigned* arithmetic here!
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const __m128i B0 = _mm_mulhi_epu16(*U0, k33050);
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const __m128i B1 = _mm_adds_epu16(B0, Y1);
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const __m128i B2 = _mm_subs_epu16(B1, k17685);
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// use logical shift for B2, which can be larger than 32767
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*R = _mm_srai_epi16(R2, 6); // range: [-14234, 30815]
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*G = _mm_srai_epi16(G4, 6); // range: [-10953, 27710]
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*B = _mm_srli_epi16(B2, 6); // range: [0, 34238]
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}
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// Load the bytes into the *upper* part of 16b words. That's "<< 8", basically.
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static WEBP_INLINE __m128i Load_HI_16(const uint8_t* src) {
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const __m128i zero = _mm_setzero_si128();
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return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src));
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}
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// Load and replicate the U/V samples
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static WEBP_INLINE __m128i Load_UV_HI_8(const uint8_t* src) {
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const __m128i zero = _mm_setzero_si128();
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const __m128i tmp0 = _mm_cvtsi32_si128(*(const uint32_t*)src);
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const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0);
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return _mm_unpacklo_epi16(tmp1, tmp1); // replicate samples
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}
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// Convert 32 samples of YUV444 to R/G/B
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static void YUV444ToRGB(const uint8_t* const y,
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const uint8_t* const u,
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const uint8_t* const v,
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__m128i* const R, __m128i* const G, __m128i* const B) {
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const __m128i Y0 = Load_HI_16(y), U0 = Load_HI_16(u), V0 = Load_HI_16(v);
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ConvertYUV444ToRGB(&Y0, &U0, &V0, R, G, B);
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}
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// Convert 32 samples of YUV420 to R/G/B
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static void YUV420ToRGB(const uint8_t* const y,
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const uint8_t* const u,
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const uint8_t* const v,
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__m128i* const R, __m128i* const G, __m128i* const B) {
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const __m128i Y0 = Load_HI_16(y), U0 = Load_UV_HI_8(u), V0 = Load_UV_HI_8(v);
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ConvertYUV444ToRGB(&Y0, &U0, &V0, R, G, B);
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}
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// Pack R/G/B/A results into 32b output.
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static WEBP_INLINE void PackAndStore4(const __m128i* const R,
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const __m128i* const G,
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const __m128i* const B,
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const __m128i* const A,
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uint8_t* const dst) {
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const __m128i rb = _mm_packus_epi16(*R, *B);
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const __m128i ga = _mm_packus_epi16(*G, *A);
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const __m128i rg = _mm_unpacklo_epi8(rb, ga);
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const __m128i ba = _mm_unpackhi_epi8(rb, ga);
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const __m128i RGBA_lo = _mm_unpacklo_epi16(rg, ba);
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const __m128i RGBA_hi = _mm_unpackhi_epi16(rg, ba);
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_mm_storeu_si128((__m128i*)(dst + 0), RGBA_lo);
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_mm_storeu_si128((__m128i*)(dst + 16), RGBA_hi);
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}
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// Pack R/G/B/A results into 16b output.
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static WEBP_INLINE void PackAndStore4444(const __m128i* const R,
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const __m128i* const G,
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const __m128i* const B,
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const __m128i* const A,
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uint8_t* const dst) {
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#if !defined(WEBP_SWAP_16BIT_CSP)
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const __m128i rg0 = _mm_packus_epi16(*R, *G);
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const __m128i ba0 = _mm_packus_epi16(*B, *A);
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#else
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const __m128i rg0 = _mm_packus_epi16(*B, *A);
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const __m128i ba0 = _mm_packus_epi16(*R, *G);
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#endif
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const __m128i mask_0xf0 = _mm_set1_epi8(0xf0);
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const __m128i rb1 = _mm_unpacklo_epi8(rg0, ba0); // rbrbrbrbrb...
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const __m128i ga1 = _mm_unpackhi_epi8(rg0, ba0); // gagagagaga...
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const __m128i rb2 = _mm_and_si128(rb1, mask_0xf0);
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const __m128i ga2 = _mm_srli_epi16(_mm_and_si128(ga1, mask_0xf0), 4);
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const __m128i rgba4444 = _mm_or_si128(rb2, ga2);
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_mm_storeu_si128((__m128i*)dst, rgba4444);
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}
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// Pack R/G/B results into 16b output.
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static WEBP_INLINE void PackAndStore565(const __m128i* const R,
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const __m128i* const G,
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const __m128i* const B,
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uint8_t* const dst) {
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const __m128i r0 = _mm_packus_epi16(*R, *R);
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const __m128i g0 = _mm_packus_epi16(*G, *G);
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const __m128i b0 = _mm_packus_epi16(*B, *B);
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const __m128i r1 = _mm_and_si128(r0, _mm_set1_epi8(0xf8));
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const __m128i b1 = _mm_and_si128(_mm_srli_epi16(b0, 3), _mm_set1_epi8(0x1f));
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const __m128i g1 = _mm_srli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0xe0)), 5);
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const __m128i g2 = _mm_slli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0x1c)), 3);
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const __m128i rg = _mm_or_si128(r1, g1);
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const __m128i gb = _mm_or_si128(g2, b1);
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#if !defined(WEBP_SWAP_16BIT_CSP)
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const __m128i rgb565 = _mm_unpacklo_epi8(rg, gb);
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#else
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const __m128i rgb565 = _mm_unpacklo_epi8(gb, rg);
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#endif
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_mm_storeu_si128((__m128i*)dst, rgb565);
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}
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// Function used several times in PlanarTo24b.
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// It samples the in buffer as follows: one every two unsigned char is stored
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// at the beginning of the buffer, while the other half is stored at the end.
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static WEBP_INLINE void PlanarTo24bHelper(const __m128i* const in /*in[6]*/,
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__m128i* const out /*out[6]*/) {
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const __m128i v_mask = _mm_set1_epi16(0x00ff);
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// Take one every two upper 8b values.
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out[0] = _mm_packus_epi16(_mm_and_si128(in[0], v_mask),
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_mm_and_si128(in[1], v_mask));
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out[1] = _mm_packus_epi16(_mm_and_si128(in[2], v_mask),
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_mm_and_si128(in[3], v_mask));
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out[2] = _mm_packus_epi16(_mm_and_si128(in[4], v_mask),
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_mm_and_si128(in[5], v_mask));
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// Take one every two lower 8b values.
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out[3] = _mm_packus_epi16(_mm_srli_epi16(in[0], 8), _mm_srli_epi16(in[1], 8));
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out[4] = _mm_packus_epi16(_mm_srli_epi16(in[2], 8), _mm_srli_epi16(in[3], 8));
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out[5] = _mm_packus_epi16(_mm_srli_epi16(in[4], 8), _mm_srli_epi16(in[5], 8));
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}
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// Pack the planar buffers
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// rrrr... rrrr... gggg... gggg... bbbb... bbbb....
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// triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ...
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static WEBP_INLINE void PlanarTo24b(__m128i* const in /*in[6]*/, uint8_t* rgb) {
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// The input is 6 registers of sixteen 8b but for the sake of explanation,
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// let's take 6 registers of four 8b values.
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// To pack, we will keep taking one every two 8b integer and move it
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// around as follows:
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// Input:
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// r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7
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// Split the 6 registers in two sets of 3 registers: the first set as the even
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// 8b bytes, the second the odd ones:
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// r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7
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// Repeat the same permutations twice more:
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// r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7
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// r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7
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__m128i tmp[6];
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PlanarTo24bHelper(in, tmp);
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PlanarTo24bHelper(tmp, in);
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PlanarTo24bHelper(in, tmp);
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// We need to do it two more times than the example as we have sixteen bytes.
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PlanarTo24bHelper(tmp, in);
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PlanarTo24bHelper(in, tmp);
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_mm_storeu_si128((__m128i*)(rgb + 0), tmp[0]);
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_mm_storeu_si128((__m128i*)(rgb + 16), tmp[1]);
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_mm_storeu_si128((__m128i*)(rgb + 32), tmp[2]);
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_mm_storeu_si128((__m128i*)(rgb + 48), tmp[3]);
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_mm_storeu_si128((__m128i*)(rgb + 64), tmp[4]);
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_mm_storeu_si128((__m128i*)(rgb + 80), tmp[5]);
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}
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#undef MK_UINT32
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void VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n < 32; n += 8, dst += 32) {
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__m128i R, G, B;
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YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B);
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PackAndStore4(&R, &G, &B, &kAlpha, dst);
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}
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}
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void VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n < 32; n += 8, dst += 32) {
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__m128i R, G, B;
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YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B);
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PackAndStore4(&B, &G, &R, &kAlpha, dst);
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}
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}
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void VP8YuvToArgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n < 32; n += 8, dst += 32) {
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__m128i R, G, B;
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YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B);
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PackAndStore4(&kAlpha, &R, &G, &B, dst);
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}
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}
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void VP8YuvToRgba444432(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n < 32; n += 8, dst += 16) {
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__m128i R, G, B;
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YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B);
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PackAndStore4444(&R, &G, &B, &kAlpha, dst);
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}
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}
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void VP8YuvToRgb56532(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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int n;
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for (n = 0; n < 32; n += 8, dst += 16) {
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__m128i R, G, B;
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YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B);
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PackAndStore565(&R, &G, &B, dst);
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}
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}
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void VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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__m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
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__m128i rgb[6];
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YUV444ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0);
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YUV444ToRGB(y + 8, u + 8, v + 8, &R1, &G1, &B1);
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YUV444ToRGB(y + 16, u + 16, v + 16, &R2, &G2, &B2);
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YUV444ToRGB(y + 24, u + 24, v + 24, &R3, &G3, &B3);
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// Cast to 8b and store as RRRRGGGGBBBB.
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rgb[0] = _mm_packus_epi16(R0, R1);
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rgb[1] = _mm_packus_epi16(R2, R3);
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rgb[2] = _mm_packus_epi16(G0, G1);
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rgb[3] = _mm_packus_epi16(G2, G3);
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rgb[4] = _mm_packus_epi16(B0, B1);
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rgb[5] = _mm_packus_epi16(B2, B3);
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// Pack as RGBRGBRGBRGB.
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PlanarTo24b(rgb, dst);
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}
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void VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst) {
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__m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
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__m128i bgr[6];
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YUV444ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0);
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YUV444ToRGB(y + 8, u + 8, v + 8, &R1, &G1, &B1);
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YUV444ToRGB(y + 16, u + 16, v + 16, &R2, &G2, &B2);
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YUV444ToRGB(y + 24, u + 24, v + 24, &R3, &G3, &B3);
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// Cast to 8b and store as BBBBGGGGRRRR.
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bgr[0] = _mm_packus_epi16(B0, B1);
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bgr[1] = _mm_packus_epi16(B2, B3);
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bgr[2] = _mm_packus_epi16(G0, G1);
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bgr[3] = _mm_packus_epi16(G2, G3);
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bgr[4] = _mm_packus_epi16(R0, R1);
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bgr[5] = _mm_packus_epi16(R2, R3);
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// Pack as BGRBGRBGRBGR.
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PlanarTo24b(bgr, dst);
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}
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//-----------------------------------------------------------------------------
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// Arbitrary-length row conversion functions
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static void YuvToRgbaRow(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst, int len) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n + 8 <= len; n += 8, dst += 32) {
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__m128i R, G, B;
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YUV420ToRGB(y, u, v, &R, &G, &B);
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PackAndStore4(&R, &G, &B, &kAlpha, dst);
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y += 8;
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u += 4;
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v += 4;
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}
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for (; n < len; ++n) { // Finish off
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VP8YuvToRgba(y[0], u[0], v[0], dst);
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dst += 4;
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y += 1;
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u += (n & 1);
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v += (n & 1);
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}
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}
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static void YuvToBgraRow(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst, int len) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n + 8 <= len; n += 8, dst += 32) {
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__m128i R, G, B;
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YUV420ToRGB(y, u, v, &R, &G, &B);
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PackAndStore4(&B, &G, &R, &kAlpha, dst);
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y += 8;
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u += 4;
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v += 4;
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}
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for (; n < len; ++n) { // Finish off
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VP8YuvToBgra(y[0], u[0], v[0], dst);
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dst += 4;
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y += 1;
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u += (n & 1);
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v += (n & 1);
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}
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}
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static void YuvToArgbRow(const uint8_t* y, const uint8_t* u, const uint8_t* v,
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uint8_t* dst, int len) {
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const __m128i kAlpha = _mm_set1_epi16(255);
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int n;
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for (n = 0; n + 8 <= len; n += 8, dst += 32) {
|
|
__m128i R, G, B;
|
|
YUV420ToRGB(y, u, v, &R, &G, &B);
|
|
PackAndStore4(&kAlpha, &R, &G, &B, dst);
|
|
y += 8;
|
|
u += 4;
|
|
v += 4;
|
|
}
|
|
for (; n < len; ++n) { // Finish off
|
|
VP8YuvToArgb(y[0], u[0], v[0], dst);
|
|
dst += 4;
|
|
y += 1;
|
|
u += (n & 1);
|
|
v += (n & 1);
|
|
}
|
|
}
|
|
|
|
static void YuvToRgbRow(const uint8_t* y, const uint8_t* u, const uint8_t* v,
|
|
uint8_t* dst, int len) {
|
|
int n;
|
|
for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) {
|
|
__m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
|
|
__m128i rgb[6];
|
|
|
|
YUV420ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0);
|
|
YUV420ToRGB(y + 8, u + 4, v + 4, &R1, &G1, &B1);
|
|
YUV420ToRGB(y + 16, u + 8, v + 8, &R2, &G2, &B2);
|
|
YUV420ToRGB(y + 24, u + 12, v + 12, &R3, &G3, &B3);
|
|
|
|
// Cast to 8b and store as RRRRGGGGBBBB.
|
|
rgb[0] = _mm_packus_epi16(R0, R1);
|
|
rgb[1] = _mm_packus_epi16(R2, R3);
|
|
rgb[2] = _mm_packus_epi16(G0, G1);
|
|
rgb[3] = _mm_packus_epi16(G2, G3);
|
|
rgb[4] = _mm_packus_epi16(B0, B1);
|
|
rgb[5] = _mm_packus_epi16(B2, B3);
|
|
|
|
// Pack as RGBRGBRGBRGB.
|
|
PlanarTo24b(rgb, dst);
|
|
|
|
y += 32;
|
|
u += 16;
|
|
v += 16;
|
|
}
|
|
for (; n < len; ++n) { // Finish off
|
|
VP8YuvToRgb(y[0], u[0], v[0], dst);
|
|
dst += 3;
|
|
y += 1;
|
|
u += (n & 1);
|
|
v += (n & 1);
|
|
}
|
|
}
|
|
|
|
static void YuvToBgrRow(const uint8_t* y, const uint8_t* u, const uint8_t* v,
|
|
uint8_t* dst, int len) {
|
|
int n;
|
|
for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) {
|
|
__m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3;
|
|
__m128i bgr[6];
|
|
|
|
YUV420ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0);
|
|
YUV420ToRGB(y + 8, u + 4, v + 4, &R1, &G1, &B1);
|
|
YUV420ToRGB(y + 16, u + 8, v + 8, &R2, &G2, &B2);
|
|
YUV420ToRGB(y + 24, u + 12, v + 12, &R3, &G3, &B3);
|
|
|
|
// Cast to 8b and store as BBBBGGGGRRRR.
|
|
bgr[0] = _mm_packus_epi16(B0, B1);
|
|
bgr[1] = _mm_packus_epi16(B2, B3);
|
|
bgr[2] = _mm_packus_epi16(G0, G1);
|
|
bgr[3] = _mm_packus_epi16(G2, G3);
|
|
bgr[4] = _mm_packus_epi16(R0, R1);
|
|
bgr[5] = _mm_packus_epi16(R2, R3);
|
|
|
|
// Pack as BGRBGRBGRBGR.
|
|
PlanarTo24b(bgr, dst);
|
|
|
|
y += 32;
|
|
u += 16;
|
|
v += 16;
|
|
}
|
|
for (; n < len; ++n) { // Finish off
|
|
VP8YuvToBgr(y[0], u[0], v[0], dst);
|
|
dst += 3;
|
|
y += 1;
|
|
u += (n & 1);
|
|
v += (n & 1);
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Entry point
|
|
|
|
extern void WebPInitSamplersSSE2(void);
|
|
|
|
WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE2(void) {
|
|
WebPSamplers[MODE_RGB] = YuvToRgbRow;
|
|
WebPSamplers[MODE_RGBA] = YuvToRgbaRow;
|
|
WebPSamplers[MODE_BGR] = YuvToBgrRow;
|
|
WebPSamplers[MODE_BGRA] = YuvToBgraRow;
|
|
WebPSamplers[MODE_ARGB] = YuvToArgbRow;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// RGB24/32 -> YUV converters
|
|
|
|
// Load eight 16b-words from *src.
|
|
#define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src))
|
|
// Store either 16b-words into *dst
|
|
#define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V))
|
|
|
|
// Function that inserts a value of the second half of the in buffer in between
|
|
// every two char of the first half.
|
|
static WEBP_INLINE void RGB24PackedToPlanarHelper(
|
|
const __m128i* const in /*in[6]*/, __m128i* const out /*out[6]*/) {
|
|
out[0] = _mm_unpacklo_epi8(in[0], in[3]);
|
|
out[1] = _mm_unpackhi_epi8(in[0], in[3]);
|
|
out[2] = _mm_unpacklo_epi8(in[1], in[4]);
|
|
out[3] = _mm_unpackhi_epi8(in[1], in[4]);
|
|
out[4] = _mm_unpacklo_epi8(in[2], in[5]);
|
|
out[5] = _mm_unpackhi_epi8(in[2], in[5]);
|
|
}
|
|
|
|
// Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers:
|
|
// rrrr... rrrr... gggg... gggg... bbbb... bbbb....
|
|
// Similar to PlanarTo24bHelper(), but in reverse order.
|
|
static WEBP_INLINE void RGB24PackedToPlanar(const uint8_t* const rgb,
|
|
__m128i* const out /*out[6]*/) {
|
|
__m128i tmp[6];
|
|
tmp[0] = _mm_loadu_si128((const __m128i*)(rgb + 0));
|
|
tmp[1] = _mm_loadu_si128((const __m128i*)(rgb + 16));
|
|
tmp[2] = _mm_loadu_si128((const __m128i*)(rgb + 32));
|
|
tmp[3] = _mm_loadu_si128((const __m128i*)(rgb + 48));
|
|
tmp[4] = _mm_loadu_si128((const __m128i*)(rgb + 64));
|
|
tmp[5] = _mm_loadu_si128((const __m128i*)(rgb + 80));
|
|
|
|
RGB24PackedToPlanarHelper(tmp, out);
|
|
RGB24PackedToPlanarHelper(out, tmp);
|
|
RGB24PackedToPlanarHelper(tmp, out);
|
|
RGB24PackedToPlanarHelper(out, tmp);
|
|
RGB24PackedToPlanarHelper(tmp, out);
|
|
}
|
|
|
|
// Convert 8 packed ARGB to r[], g[], b[]
|
|
static WEBP_INLINE void RGB32PackedToPlanar(const uint32_t* const argb,
|
|
__m128i* const r,
|
|
__m128i* const g,
|
|
__m128i* const b) {
|
|
const __m128i zero = _mm_setzero_si128();
|
|
const __m128i in0 = LOAD_16(argb + 0); // argb3 | argb2 | argb1 | argb0
|
|
const __m128i in1 = LOAD_16(argb + 4); // argb7 | argb6 | argb5 | argb4
|
|
// column-wise transpose
|
|
const __m128i A0 = _mm_unpacklo_epi8(in0, in1);
|
|
const __m128i A1 = _mm_unpackhi_epi8(in0, in1);
|
|
const __m128i B0 = _mm_unpacklo_epi8(A0, A1);
|
|
const __m128i B1 = _mm_unpackhi_epi8(A0, A1);
|
|
// C0 = g7 g6 ... g1 g0 | b7 b6 ... b1 b0
|
|
// C1 = a7 a6 ... a1 a0 | r7 r6 ... r1 r0
|
|
const __m128i C0 = _mm_unpacklo_epi8(B0, B1);
|
|
const __m128i C1 = _mm_unpackhi_epi8(B0, B1);
|
|
// store 16b
|
|
*r = _mm_unpacklo_epi8(C1, zero);
|
|
*g = _mm_unpackhi_epi8(C0, zero);
|
|
*b = _mm_unpacklo_epi8(C0, zero);
|
|
}
|
|
|
|
// This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX
|
|
// It's a macro and not a function because we need to use immediate values with
|
|
// srai_epi32, e.g.
|
|
#define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \
|
|
ROUNDER, DESCALE_FIX, OUT) do { \
|
|
const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG); \
|
|
const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG); \
|
|
const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB); \
|
|
const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB); \
|
|
const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo); \
|
|
const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi); \
|
|
const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER); \
|
|
const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER); \
|
|
const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX); \
|
|
const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX); \
|
|
(OUT) = _mm_packs_epi32(V5_lo, V5_hi); \
|
|
} while (0)
|
|
|
|
#define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A))
|
|
static WEBP_INLINE void ConvertRGBToY(const __m128i* const R,
|
|
const __m128i* const G,
|
|
const __m128i* const B,
|
|
__m128i* const Y) {
|
|
const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384);
|
|
const __m128i kGB_y = MK_CST_16(16384, 6420);
|
|
const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF);
|
|
|
|
const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G);
|
|
const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G);
|
|
const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B);
|
|
const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B);
|
|
TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y);
|
|
}
|
|
|
|
static WEBP_INLINE void ConvertRGBToUV(const __m128i* const R,
|
|
const __m128i* const G,
|
|
const __m128i* const B,
|
|
__m128i* const U, __m128i* const V) {
|
|
const __m128i kRG_u = MK_CST_16(-9719, -19081);
|
|
const __m128i kGB_u = MK_CST_16(0, 28800);
|
|
const __m128i kRG_v = MK_CST_16(28800, 0);
|
|
const __m128i kGB_v = MK_CST_16(-24116, -4684);
|
|
const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2);
|
|
|
|
const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G);
|
|
const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G);
|
|
const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B);
|
|
const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B);
|
|
TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u,
|
|
kHALF_UV, YUV_FIX + 2, *U);
|
|
TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v,
|
|
kHALF_UV, YUV_FIX + 2, *V);
|
|
}
|
|
|
|
#undef MK_CST_16
|
|
#undef TRANSFORM
|
|
|
|
static void ConvertRGB24ToY(const uint8_t* rgb, uint8_t* y, int width) {
|
|
const int max_width = width & ~31;
|
|
int i;
|
|
for (i = 0; i < max_width; rgb += 3 * 16 * 2) {
|
|
__m128i rgb_plane[6];
|
|
int j;
|
|
|
|
RGB24PackedToPlanar(rgb, rgb_plane);
|
|
|
|
for (j = 0; j < 2; ++j, i += 16) {
|
|
const __m128i zero = _mm_setzero_si128();
|
|
__m128i r, g, b, Y0, Y1;
|
|
|
|
// Convert to 16-bit Y.
|
|
r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero);
|
|
g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero);
|
|
b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero);
|
|
ConvertRGBToY(&r, &g, &b, &Y0);
|
|
|
|
// Convert to 16-bit Y.
|
|
r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero);
|
|
g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero);
|
|
b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero);
|
|
ConvertRGBToY(&r, &g, &b, &Y1);
|
|
|
|
// Cast to 8-bit and store.
|
|
STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
|
|
}
|
|
}
|
|
for (; i < width; ++i, rgb += 3) { // left-over
|
|
y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF);
|
|
}
|
|
}
|
|
|
|
static void ConvertBGR24ToY(const uint8_t* bgr, uint8_t* y, int width) {
|
|
const int max_width = width & ~31;
|
|
int i;
|
|
for (i = 0; i < max_width; bgr += 3 * 16 * 2) {
|
|
__m128i bgr_plane[6];
|
|
int j;
|
|
|
|
RGB24PackedToPlanar(bgr, bgr_plane);
|
|
|
|
for (j = 0; j < 2; ++j, i += 16) {
|
|
const __m128i zero = _mm_setzero_si128();
|
|
__m128i r, g, b, Y0, Y1;
|
|
|
|
// Convert to 16-bit Y.
|
|
b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero);
|
|
g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero);
|
|
r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero);
|
|
ConvertRGBToY(&r, &g, &b, &Y0);
|
|
|
|
// Convert to 16-bit Y.
|
|
b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero);
|
|
g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero);
|
|
r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero);
|
|
ConvertRGBToY(&r, &g, &b, &Y1);
|
|
|
|
// Cast to 8-bit and store.
|
|
STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
|
|
}
|
|
}
|
|
for (; i < width; ++i, bgr += 3) { // left-over
|
|
y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF);
|
|
}
|
|
}
|
|
|
|
static void ConvertARGBToY(const uint32_t* argb, uint8_t* y, int width) {
|
|
const int max_width = width & ~15;
|
|
int i;
|
|
for (i = 0; i < max_width; i += 16) {
|
|
__m128i r, g, b, Y0, Y1;
|
|
RGB32PackedToPlanar(&argb[i + 0], &r, &g, &b);
|
|
ConvertRGBToY(&r, &g, &b, &Y0);
|
|
RGB32PackedToPlanar(&argb[i + 8], &r, &g, &b);
|
|
ConvertRGBToY(&r, &g, &b, &Y1);
|
|
STORE_16(_mm_packus_epi16(Y0, Y1), y + i);
|
|
}
|
|
for (; i < width; ++i) { // left-over
|
|
const uint32_t p = argb[i];
|
|
y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff,
|
|
YUV_HALF);
|
|
}
|
|
}
|
|
|
|
// Horizontal add (doubled) of two 16b values, result is 16b.
|
|
// in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ...
|
|
static void HorizontalAddPack(const __m128i* const A, const __m128i* const B,
|
|
__m128i* const out) {
|
|
const __m128i k2 = _mm_set1_epi16(2);
|
|
const __m128i C = _mm_madd_epi16(*A, k2);
|
|
const __m128i D = _mm_madd_epi16(*B, k2);
|
|
*out = _mm_packs_epi32(C, D);
|
|
}
|
|
|
|
static void ConvertARGBToUV(const uint32_t* argb, uint8_t* u, uint8_t* v,
|
|
int src_width, int do_store) {
|
|
const int max_width = src_width & ~31;
|
|
int i;
|
|
for (i = 0; i < max_width; i += 32, u += 16, v += 16) {
|
|
__m128i r0, g0, b0, r1, g1, b1, U0, V0, U1, V1;
|
|
RGB32PackedToPlanar(&argb[i + 0], &r0, &g0, &b0);
|
|
RGB32PackedToPlanar(&argb[i + 8], &r1, &g1, &b1);
|
|
HorizontalAddPack(&r0, &r1, &r0);
|
|
HorizontalAddPack(&g0, &g1, &g0);
|
|
HorizontalAddPack(&b0, &b1, &b0);
|
|
ConvertRGBToUV(&r0, &g0, &b0, &U0, &V0);
|
|
|
|
RGB32PackedToPlanar(&argb[i + 16], &r0, &g0, &b0);
|
|
RGB32PackedToPlanar(&argb[i + 24], &r1, &g1, &b1);
|
|
HorizontalAddPack(&r0, &r1, &r0);
|
|
HorizontalAddPack(&g0, &g1, &g0);
|
|
HorizontalAddPack(&b0, &b1, &b0);
|
|
ConvertRGBToUV(&r0, &g0, &b0, &U1, &V1);
|
|
|
|
U0 = _mm_packus_epi16(U0, U1);
|
|
V0 = _mm_packus_epi16(V0, V1);
|
|
if (!do_store) {
|
|
const __m128i prev_u = LOAD_16(u);
|
|
const __m128i prev_v = LOAD_16(v);
|
|
U0 = _mm_avg_epu8(U0, prev_u);
|
|
V0 = _mm_avg_epu8(V0, prev_v);
|
|
}
|
|
STORE_16(U0, u);
|
|
STORE_16(V0, v);
|
|
}
|
|
if (i < src_width) { // left-over
|
|
WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store);
|
|
}
|
|
}
|
|
|
|
// Convert 16 packed ARGB 16b-values to r[], g[], b[]
|
|
static WEBP_INLINE void RGBA32PackedToPlanar_16b(const uint16_t* const rgbx,
|
|
__m128i* const r,
|
|
__m128i* const g,
|
|
__m128i* const b) {
|
|
const __m128i in0 = LOAD_16(rgbx + 0); // r0 | g0 | b0 |x| r1 | g1 | b1 |x
|
|
const __m128i in1 = LOAD_16(rgbx + 8); // r2 | g2 | b2 |x| r3 | g3 | b3 |x
|
|
const __m128i in2 = LOAD_16(rgbx + 16); // r4 | ...
|
|
const __m128i in3 = LOAD_16(rgbx + 24); // r6 | ...
|
|
// column-wise transpose
|
|
const __m128i A0 = _mm_unpacklo_epi16(in0, in1);
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const __m128i A1 = _mm_unpackhi_epi16(in0, in1);
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const __m128i A2 = _mm_unpacklo_epi16(in2, in3);
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const __m128i A3 = _mm_unpackhi_epi16(in2, in3);
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const __m128i B0 = _mm_unpacklo_epi16(A0, A1); // r0 r1 r2 r3 | g0 g1 ..
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const __m128i B1 = _mm_unpackhi_epi16(A0, A1); // b0 b1 b2 b3 | x x x x
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const __m128i B2 = _mm_unpacklo_epi16(A2, A3); // r4 r5 r6 r7 | g4 g5 ..
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const __m128i B3 = _mm_unpackhi_epi16(A2, A3); // b4 b5 b6 b7 | x x x x
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*r = _mm_unpacklo_epi64(B0, B2);
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*g = _mm_unpackhi_epi64(B0, B2);
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*b = _mm_unpacklo_epi64(B1, B3);
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}
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static void ConvertRGBA32ToUV(const uint16_t* rgb,
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uint8_t* u, uint8_t* v, int width) {
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const int max_width = width & ~15;
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const uint16_t* const last_rgb = rgb + 4 * max_width;
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while (rgb < last_rgb) {
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__m128i r, g, b, U0, V0, U1, V1;
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RGBA32PackedToPlanar_16b(rgb + 0, &r, &g, &b);
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ConvertRGBToUV(&r, &g, &b, &U0, &V0);
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RGBA32PackedToPlanar_16b(rgb + 32, &r, &g, &b);
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ConvertRGBToUV(&r, &g, &b, &U1, &V1);
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STORE_16(_mm_packus_epi16(U0, U1), u);
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STORE_16(_mm_packus_epi16(V0, V1), v);
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u += 16;
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v += 16;
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rgb += 2 * 32;
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}
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if (max_width < width) { // left-over
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WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width);
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}
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}
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//------------------------------------------------------------------------------
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|
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extern void WebPInitConvertARGBToYUVSSE2(void);
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|
|
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WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE2(void) {
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WebPConvertARGBToY = ConvertARGBToY;
|
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WebPConvertARGBToUV = ConvertARGBToUV;
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|
|
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WebPConvertRGB24ToY = ConvertRGB24ToY;
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WebPConvertBGR24ToY = ConvertBGR24ToY;
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|
|
|
WebPConvertRGBA32ToUV = ConvertRGBA32ToUV;
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|
}
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|
|
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#else // !WEBP_USE_SSE2
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|
|
|
WEBP_DSP_INIT_STUB(WebPInitSamplersSSE2)
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|
WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE2)
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|
|
|
#endif // WEBP_USE_SSE2
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