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// Copyright 2016 Google Inc. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the COPYING file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS. All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.
// -----------------------------------------------------------------------------
//
// MSA variant of methods for lossless decoder
//
// Author: Prashant Patil (prashant.patil@imgtec.com)
#include "./dsp.h"
#if defined(WEBP_USE_MSA)
#include "./lossless.h"
#include "./msa_macro.h"
//------------------------------------------------------------------------------
// Colorspace conversion functions
#define CONVERT16_BGRA_XXX(psrc, pdst, m0, m1, m2) do { \
v16u8 src0, src1, src2, src3, dst0, dst1, dst2; \
LD_UB4(psrc, 16, src0, src1, src2, src3); \
VSHF_B2_UB(src0, src1, src1, src2, m0, m1, dst0, dst1); \
dst2 = VSHF_UB(src2, src3, m2); \
ST_UB2(dst0, dst1, pdst, 16); \
ST_UB(dst2, pdst + 32); \
} while (0)
#define CONVERT12_BGRA_XXX(psrc, pdst, m0, m1, m2) do { \
uint32_t pix_w; \
v16u8 src0, src1, src2, dst0, dst1, dst2; \
LD_UB3(psrc, 16, src0, src1, src2); \
VSHF_B2_UB(src0, src1, src1, src2, m0, m1, dst0, dst1); \
dst2 = VSHF_UB(src2, src2, m2); \
ST_UB2(dst0, dst1, pdst, 16); \
pix_w = __msa_copy_s_w((v4i32)dst2, 0); \
SW(pix_w, pdst + 32); \
} while (0)
#define CONVERT8_BGRA_XXX(psrc, pdst, m0, m1) do { \
uint64_t pix_d; \
v16u8 src0, src1, src2, dst0, dst1; \
LD_UB2(psrc, 16, src0, src1); \
VSHF_B2_UB(src0, src1, src1, src2, m0, m1, dst0, dst1); \
ST_UB(dst0, pdst); \
pix_d = __msa_copy_s_d((v2i64)dst1, 0); \
SD(pix_d, pdst + 16); \
} while (0)
#define CONVERT4_BGRA_XXX(psrc, pdst, m) do { \
const v16u8 src0 = LD_UB(psrc); \
const v16u8 dst0 = VSHF_UB(src0, src0, m); \
uint64_t pix_d = __msa_copy_s_d((v2i64)dst0, 0); \
uint32_t pix_w = __msa_copy_s_w((v4i32)dst0, 2); \
SD(pix_d, pdst + 0); \
SW(pix_w, pdst + 8); \
} while (0)
#define CONVERT1_BGRA_BGR(psrc, pdst) do { \
const int32_t b = (psrc)[0]; \
const int32_t g = (psrc)[1]; \
const int32_t r = (psrc)[2]; \
(pdst)[0] = b; \
(pdst)[1] = g; \
(pdst)[2] = r; \
} while (0)
#define CONVERT1_BGRA_RGB(psrc, pdst) do { \
const int32_t b = (psrc)[0]; \
const int32_t g = (psrc)[1]; \
const int32_t r = (psrc)[2]; \
(pdst)[0] = r; \
(pdst)[1] = g; \
(pdst)[2] = b; \
} while (0)
#define TRANSFORM_COLOR_INVERSE_8(src0, src1, dst0, dst1, \
c0, c1, mask0, mask1) do { \
v8i16 g0, g1, t0, t1, t2, t3; \
v4i32 t4, t5; \
VSHF_B2_SH(src0, src0, src1, src1, mask0, mask0, g0, g1); \
DOTP_SB2_SH(g0, g1, c0, c0, t0, t1); \
SRAI_H2_SH(t0, t1, 5); \
t0 = __msa_addv_h(t0, (v8i16)src0); \
t1 = __msa_addv_h(t1, (v8i16)src1); \
t4 = __msa_srli_w((v4i32)t0, 16); \
t5 = __msa_srli_w((v4i32)t1, 16); \
DOTP_SB2_SH(t4, t5, c1, c1, t2, t3); \
SRAI_H2_SH(t2, t3, 5); \
ADD2(t0, t2, t1, t3, t0, t1); \
VSHF_B2_UB(src0, t0, src1, t1, mask1, mask1, dst0, dst1); \
} while (0)
#define TRANSFORM_COLOR_INVERSE_4(src, dst, c0, c1, mask0, mask1) do { \
const v16i8 g0 = VSHF_SB(src, src, mask0); \
v8i16 t0 = __msa_dotp_s_h(c0, g0); \
v8i16 t1; \
v4i32 t2; \
t0 = SRAI_H(t0, 5); \
t0 = __msa_addv_h(t0, (v8i16)src); \
t2 = __msa_srli_w((v4i32)t0, 16); \
t1 = __msa_dotp_s_h(c1, (v16i8)t2); \
t1 = SRAI_H(t1, 5); \
t0 = t0 + t1; \
dst = VSHF_UB(src, t0, mask1); \
} while (0)
static void ConvertBGRAToRGBA(const uint32_t* src,
int num_pixels, uint8_t* dst) {
int i;
const uint8_t* ptemp_src = (const uint8_t*)src;
uint8_t* ptemp_dst = (uint8_t*)dst;
v16u8 src0, dst0;
const v16u8 mask = { 2, 1, 0, 3, 6, 5, 4, 7, 10, 9, 8, 11, 14, 13, 12, 15 };
while (num_pixels >= 8) {
v16u8 src1, dst1;
LD_UB2(ptemp_src, 16, src0, src1);
VSHF_B2_UB(src0, src0, src1, src1, mask, mask, dst0, dst1);
ST_UB2(dst0, dst1, ptemp_dst, 16);
ptemp_src += 32;
ptemp_dst += 32;
num_pixels -= 8;
}
if (num_pixels > 0) {
if (num_pixels >= 4) {
src0 = LD_UB(ptemp_src);
dst0 = VSHF_UB(src0, src0, mask);
ST_UB(dst0, ptemp_dst);
ptemp_src += 16;
ptemp_dst += 16;
num_pixels -= 4;
}
for (i = 0; i < num_pixels; i++) {
const uint8_t b = ptemp_src[2];
const uint8_t g = ptemp_src[1];
const uint8_t r = ptemp_src[0];
const uint8_t a = ptemp_src[3];
ptemp_dst[0] = b;
ptemp_dst[1] = g;
ptemp_dst[2] = r;
ptemp_dst[3] = a;
ptemp_src += 4;
ptemp_dst += 4;
}
}
}
static void ConvertBGRAToBGR(const uint32_t* src,
int num_pixels, uint8_t* dst) {
const uint8_t* ptemp_src = (const uint8_t*)src;
uint8_t* ptemp_dst = (uint8_t*)dst;
const v16u8 mask0 = { 0, 1, 2, 4, 5, 6, 8, 9, 10, 12, 13, 14,
16, 17, 18, 20 };
const v16u8 mask1 = { 5, 6, 8, 9, 10, 12, 13, 14, 16, 17, 18, 20,
21, 22, 24, 25 };
const v16u8 mask2 = { 10, 12, 13, 14, 16, 17, 18, 20, 21, 22, 24, 25,
26, 28, 29, 30 };
while (num_pixels >= 16) {
CONVERT16_BGRA_XXX(ptemp_src, ptemp_dst, mask0, mask1, mask2);
ptemp_src += 64;
ptemp_dst += 48;
num_pixels -= 16;
}
if (num_pixels > 0) {
if (num_pixels >= 12) {
CONVERT12_BGRA_XXX(ptemp_src, ptemp_dst, mask0, mask1, mask2);
ptemp_src += 48;
ptemp_dst += 36;
num_pixels -= 12;
} else if (num_pixels >= 8) {
CONVERT8_BGRA_XXX(ptemp_src, ptemp_dst, mask0, mask1);
ptemp_src += 32;
ptemp_dst += 24;
num_pixels -= 8;
} else if (num_pixels >= 4) {
CONVERT4_BGRA_XXX(ptemp_src, ptemp_dst, mask0);
ptemp_src += 16;
ptemp_dst += 12;
num_pixels -= 4;
}
if (num_pixels == 3) {
CONVERT1_BGRA_BGR(ptemp_src + 0, ptemp_dst + 0);
CONVERT1_BGRA_BGR(ptemp_src + 4, ptemp_dst + 3);
CONVERT1_BGRA_BGR(ptemp_src + 8, ptemp_dst + 6);
} else if (num_pixels == 2) {
CONVERT1_BGRA_BGR(ptemp_src + 0, ptemp_dst + 0);
CONVERT1_BGRA_BGR(ptemp_src + 4, ptemp_dst + 3);
} else if (num_pixels == 1) {
CONVERT1_BGRA_BGR(ptemp_src, ptemp_dst);
}
}
}
static void ConvertBGRAToRGB(const uint32_t* src,
int num_pixels, uint8_t* dst) {
const uint8_t* ptemp_src = (const uint8_t*)src;
uint8_t* ptemp_dst = (uint8_t*)dst;
const v16u8 mask0 = { 2, 1, 0, 6, 5, 4, 10, 9, 8, 14, 13, 12,
18, 17, 16, 22 };
const v16u8 mask1 = { 5, 4, 10, 9, 8, 14, 13, 12, 18, 17, 16, 22,
21, 20, 26, 25 };
const v16u8 mask2 = { 8, 14, 13, 12, 18, 17, 16, 22, 21, 20, 26, 25,
24, 30, 29, 28 };
while (num_pixels >= 16) {
CONVERT16_BGRA_XXX(ptemp_src, ptemp_dst, mask0, mask1, mask2);
ptemp_src += 64;
ptemp_dst += 48;
num_pixels -= 16;
}
if (num_pixels) {
if (num_pixels >= 12) {
CONVERT12_BGRA_XXX(ptemp_src, ptemp_dst, mask0, mask1, mask2);
ptemp_src += 48;
ptemp_dst += 36;
num_pixels -= 12;
} else if (num_pixels >= 8) {
CONVERT8_BGRA_XXX(ptemp_src, ptemp_dst, mask0, mask1);
ptemp_src += 32;
ptemp_dst += 24;
num_pixels -= 8;
} else if (num_pixels >= 4) {
CONVERT4_BGRA_XXX(ptemp_src, ptemp_dst, mask0);
ptemp_src += 16;
ptemp_dst += 12;
num_pixels -= 4;
}
if (num_pixels == 3) {
CONVERT1_BGRA_RGB(ptemp_src + 0, ptemp_dst + 0);
CONVERT1_BGRA_RGB(ptemp_src + 4, ptemp_dst + 3);
CONVERT1_BGRA_RGB(ptemp_src + 8, ptemp_dst + 6);
} else if (num_pixels == 2) {
CONVERT1_BGRA_RGB(ptemp_src + 0, ptemp_dst + 0);
CONVERT1_BGRA_RGB(ptemp_src + 4, ptemp_dst + 3);
} else if (num_pixels == 1) {
CONVERT1_BGRA_RGB(ptemp_src, ptemp_dst);
}
}
}
static void AddGreenToBlueAndRed(const uint32_t* const src, int num_pixels,
uint32_t* dst) {
int i;
const uint8_t* in = (const uint8_t*)src;
uint8_t* out = (uint8_t*)dst;
v16u8 src0, dst0, tmp0;
const v16u8 mask = { 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255,
13, 255, 13, 255 };
while (num_pixels >= 8) {
v16u8 src1, dst1, tmp1;
LD_UB2(in, 16, src0, src1);
VSHF_B2_UB(src0, src1, src1, src0, mask, mask, tmp0, tmp1);
ADD2(src0, tmp0, src1, tmp1, dst0, dst1);
ST_UB2(dst0, dst1, out, 16);
in += 32;
out += 32;
num_pixels -= 8;
}
if (num_pixels > 0) {
if (num_pixels >= 4) {
src0 = LD_UB(in);
tmp0 = VSHF_UB(src0, src0, mask);
dst0 = src0 + tmp0;
ST_UB(dst0, out);
in += 16;
out += 16;
num_pixels -= 4;
}
for (i = 0; i < num_pixels; i++) {
const uint8_t b = in[0];
const uint8_t g = in[1];
const uint8_t r = in[2];
out[0] = (b + g) & 0xff;
out[1] = g;
out[2] = (r + g) & 0xff;
out[4] = in[4];
out += 4;
}
}
}
static void TransformColorInverse(const VP8LMultipliers* const m,
const uint32_t* src, int num_pixels,
uint32_t* dst) {
v16u8 src0, dst0;
const v16i8 g2br = (v16i8)__msa_fill_w(m->green_to_blue_ |
(m->green_to_red_ << 16));
const v16i8 r2b = (v16i8)__msa_fill_w(m->red_to_blue_);
const v16u8 mask0 = { 1, 255, 1, 255, 5, 255, 5, 255, 9, 255, 9, 255,
13, 255, 13, 255 };
const v16u8 mask1 = { 16, 1, 18, 3, 20, 5, 22, 7, 24, 9, 26, 11,
28, 13, 30, 15 };
while (num_pixels >= 8) {
v16u8 src1, dst1;
LD_UB2(src, 4, src0, src1);
TRANSFORM_COLOR_INVERSE_8(src0, src1, dst0, dst1, g2br, r2b, mask0, mask1);
ST_UB2(dst0, dst1, dst, 4);
src += 8;
dst += 8;
num_pixels -= 8;
}
if (num_pixels > 0) {
if (num_pixels >= 4) {
src0 = LD_UB(src);
TRANSFORM_COLOR_INVERSE_4(src0, dst0, g2br, r2b, mask0, mask1);
ST_UB(dst0, dst);
src += 4;
dst += 4;
num_pixels -= 4;
}
if (num_pixels > 0) {
src0 = LD_UB(src);
TRANSFORM_COLOR_INVERSE_4(src0, dst0, g2br, r2b, mask0, mask1);
if (num_pixels == 3) {
const uint64_t pix_d = __msa_copy_s_d((v2i64)dst0, 0);
const uint32_t pix_w = __msa_copy_s_w((v4i32)dst0, 2);
SD(pix_d, dst + 0);
SW(pix_w, dst + 2);
} else if (num_pixels == 2) {
const uint64_t pix_d = __msa_copy_s_d((v2i64)dst0, 0);
SD(pix_d, dst);
} else {
const uint32_t pix_w = __msa_copy_s_w((v4i32)dst0, 0);
SW(pix_w, dst);
}
}
}
}
//------------------------------------------------------------------------------
// Entry point
extern void VP8LDspInitMSA(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8LDspInitMSA(void) {
VP8LConvertBGRAToRGBA = ConvertBGRAToRGBA;
VP8LConvertBGRAToBGR = ConvertBGRAToBGR;
VP8LConvertBGRAToRGB = ConvertBGRAToRGB;
VP8LAddGreenToBlueAndRed = AddGreenToBlueAndRed;
VP8LTransformColorInverse = TransformColorInverse;
}
#else // !WEBP_USE_MSA
WEBP_DSP_INIT_STUB(VP8LDspInitMSA)
#endif // WEBP_USE_MSA
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