예제 #1
0
static WEBP_INLINE void HE4(uint8_t* dst, const uint8_t* top) {    // horizontal
  const int X = top[-1];
  const int I = top[-2];
  const int J = top[-3];
  const int K = top[-4];
  const int L = top[-5];
  WebPUint32ToMem(dst + 0 * BPS, 0x01010101U * AVG3(X, I, J));
  WebPUint32ToMem(dst + 1 * BPS, 0x01010101U * AVG3(I, J, K));
  WebPUint32ToMem(dst + 2 * BPS, 0x01010101U * AVG3(J, K, L));
  WebPUint32ToMem(dst + 3 * BPS, 0x01010101U * AVG3(K, L, L));
}
예제 #2
0
파일: dec.c 프로젝트: cyberCBM/DetectO
static void HE4_C(uint8_t* dst) {    // horizontal
  const int A = dst[-1 - BPS];
  const int B = dst[-1];
  const int C = dst[-1 + BPS];
  const int D = dst[-1 + 2 * BPS];
  const int E = dst[-1 + 3 * BPS];
  WebPUint32ToMem(dst + 0 * BPS, 0x01010101U * AVG3(A, B, C));
  WebPUint32ToMem(dst + 1 * BPS, 0x01010101U * AVG3(B, C, D));
  WebPUint32ToMem(dst + 2 * BPS, 0x01010101U * AVG3(C, D, E));
  WebPUint32ToMem(dst + 3 * BPS, 0x01010101U * AVG3(D, E, E));
}
예제 #3
0
static void RescalerImportRowExpand_SSE2(WebPRescaler* const wrk,
                                         const uint8_t* src) {
  rescaler_t* frow = wrk->frow;
  const rescaler_t* const frow_end = frow + wrk->dst_width * wrk->num_channels;
  const int x_add = wrk->x_add;
  int accum = x_add;
  __m128i cur_pixels;

  // SSE2 implementation only works with 16b signed arithmetic at max.
  if (wrk->src_width < 8 || accum >= (1 << 15)) {
    WebPRescalerImportRowExpand_C(wrk, src);
    return;
  }

  assert(!WebPRescalerInputDone(wrk));
  assert(wrk->x_expand);
  if (wrk->num_channels == 4) {
    LoadTwoPixels_SSE2(src, &cur_pixels);
    src += 4;
    while (1) {
      const __m128i mult = _mm_set1_epi32(((x_add - accum) << 16) | accum);
      const __m128i out = _mm_madd_epi16(cur_pixels, mult);
      _mm_storeu_si128((__m128i*)frow, out);
      frow += 4;
      if (frow >= frow_end) break;
      accum -= wrk->x_sub;
      if (accum < 0) {
        LoadTwoPixels_SSE2(src, &cur_pixels);
        src += 4;
        accum += x_add;
      }
    }
  } else {
    int left;
    const uint8_t* const src_limit = src + wrk->src_width - 8;
    LoadEightPixels_SSE2(src, &cur_pixels);
    src += 7;
    left = 7;
    while (1) {
      const __m128i mult = _mm_cvtsi32_si128(((x_add - accum) << 16) | accum);
      const __m128i out = _mm_madd_epi16(cur_pixels, mult);
      assert(sizeof(*frow) == sizeof(uint32_t));
      WebPUint32ToMem((uint8_t*)frow, _mm_cvtsi128_si32(out));
      frow += 1;
      if (frow >= frow_end) break;
      accum -= wrk->x_sub;
      if (accum < 0) {
        if (--left) {
          cur_pixels = _mm_srli_si128(cur_pixels, 2);
        } else if (src <= src_limit) {
          LoadEightPixels_SSE2(src, &cur_pixels);
          src += 7;
          left = 7;
        } else {   // tail
          cur_pixels = _mm_srli_si128(cur_pixels, 2);
          cur_pixels = _mm_insert_epi16(cur_pixels, src[1], 1);
          src += 1;
          left = 1;
        }
        accum += x_add;
      }
    }
  }
  assert(accum == 0);
}