lossless_msa.c 12.6 KB
Newer Older
wester committed
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355
// 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