Use the upstream version of libwebp, v0.4.3.

third_party/libwebp/dsp/yuv_sse2.c

+// Copyright 2014 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.
+// -----------------------------------------------------------------------------
+//
+// YUV->RGB conversion functions
+//
+// Author: Skal (pascal.massimino@gmail.com)
+
+#include "./yuv.h"
+
+#if defined(WEBP_USE_SSE2)
+
+#include <emmintrin.h>
+#include <string.h>   // for memcpy
+
+typedef union {   // handy struct for converting SSE2 registers
+  int32_t i32[4];
+  uint8_t u8[16];
+  __m128i m;
+} VP8kCstSSE2;
+
+#if defined(WEBP_YUV_USE_SSE2_TABLES)
+
+#include "./yuv_tables_sse2.h"
+
+void VP8YUVInitSSE2(void) {}
+
+#else
+
+static int done_sse2 = 0;
+static VP8kCstSSE2 VP8kUtoRGBA[256], VP8kVtoRGBA[256], VP8kYtoRGBA[256];
+
+void VP8YUVInitSSE2(void) {
+  if (!done_sse2) {
+    int i;
+    for (i = 0; i < 256; ++i) {
+      VP8kYtoRGBA[i].i32[0] =
+        VP8kYtoRGBA[i].i32[1] =
+        VP8kYtoRGBA[i].i32[2] = (i - 16) * kYScale + YUV_HALF2;
+      VP8kYtoRGBA[i].i32[3] = 0xff << YUV_FIX2;
+
+      VP8kUtoRGBA[i].i32[0] = 0;
+      VP8kUtoRGBA[i].i32[1] = -kUToG * (i - 128);
+      VP8kUtoRGBA[i].i32[2] =  kUToB * (i - 128);
+      VP8kUtoRGBA[i].i32[3] = 0;
+
+      VP8kVtoRGBA[i].i32[0] =  kVToR * (i - 128);
+      VP8kVtoRGBA[i].i32[1] = -kVToG * (i - 128);
+      VP8kVtoRGBA[i].i32[2] = 0;
+      VP8kVtoRGBA[i].i32[3] = 0;
+    }
+    done_sse2 = 1;
+
+#if 0   // code used to generate 'yuv_tables_sse2.h'
+    printf("static const VP8kCstSSE2 VP8kYtoRGBA[256] = {\n");
+    for (i = 0; i < 256; ++i) {
+      printf("  {{0x%.8x, 0x%.8x, 0x%.8x, 0x%.8x}},\n",
+             VP8kYtoRGBA[i].i32[0], VP8kYtoRGBA[i].i32[1],
+             VP8kYtoRGBA[i].i32[2], VP8kYtoRGBA[i].i32[3]);
+    }
+    printf("};\n\n");
+    printf("static const VP8kCstSSE2 VP8kUtoRGBA[256] = {\n");
+    for (i = 0; i < 256; ++i) {
+      printf("  {{0, 0x%.8x, 0x%.8x, 0}},\n",
+             VP8kUtoRGBA[i].i32[1], VP8kUtoRGBA[i].i32[2]);
+    }
+    printf("};\n\n");
+    printf("static VP8kCstSSE2 VP8kVtoRGBA[256] = {\n");
+    for (i = 0; i < 256; ++i) {
+      printf("  {{0x%.8x, 0x%.8x, 0, 0}},\n",
+             VP8kVtoRGBA[i].i32[0], VP8kVtoRGBA[i].i32[1]);
+    }
+    printf("};\n\n");
+#endif
+  }
+}
+
+#endif  // WEBP_YUV_USE_SSE2_TABLES
+
+//-----------------------------------------------------------------------------
+
+static WEBP_INLINE __m128i LoadUVPart(int u, int v) {
+  const __m128i u_part = _mm_loadu_si128(&VP8kUtoRGBA[u].m);
+  const __m128i v_part = _mm_loadu_si128(&VP8kVtoRGBA[v].m);
+  const __m128i uv_part = _mm_add_epi32(u_part, v_part);
+  return uv_part;
+}
+
+static WEBP_INLINE __m128i GetRGBA32bWithUV(int y, const __m128i uv_part) {
+  const __m128i y_part = _mm_loadu_si128(&VP8kYtoRGBA[y].m);
+  const __m128i rgba1 = _mm_add_epi32(y_part, uv_part);
+  const __m128i rgba2 = _mm_srai_epi32(rgba1, YUV_FIX2);
+  return rgba2;
+}
+
+static WEBP_INLINE __m128i GetRGBA32b(int y, int u, int v) {
+  const __m128i uv_part = LoadUVPart(u, v);
+  return GetRGBA32bWithUV(y, uv_part);
+}
+
+static WEBP_INLINE void YuvToRgbSSE2(uint8_t y, uint8_t u, uint8_t v,
+                                     uint8_t* const rgb) {
+  const __m128i tmp0 = GetRGBA32b(y, u, v);
+  const __m128i tmp1 = _mm_packs_epi32(tmp0, tmp0);
+  const __m128i tmp2 = _mm_packus_epi16(tmp1, tmp1);
+  // Note: we store 8 bytes at a time, not 3 bytes! -> memory stomp
+  _mm_storel_epi64((__m128i*)rgb, tmp2);
+}
+
+static WEBP_INLINE void YuvToBgrSSE2(uint8_t y, uint8_t u, uint8_t v,
+                                     uint8_t* const bgr) {
+  const __m128i tmp0 = GetRGBA32b(y, u, v);
+  const __m128i tmp1 = _mm_shuffle_epi32(tmp0, _MM_SHUFFLE(3, 0, 1, 2));
+  const __m128i tmp2 = _mm_packs_epi32(tmp1, tmp1);
+  const __m128i tmp3 = _mm_packus_epi16(tmp2, tmp2);
+  // Note: we store 8 bytes at a time, not 3 bytes! -> memory stomp
+  _mm_storel_epi64((__m128i*)bgr, tmp3);
+}
+
+//-----------------------------------------------------------------------------
+// Convert spans of 32 pixels to various RGB formats for the fancy upsampler.
+
+#ifdef FANCY_UPSAMPLING
+
+void VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
+                    uint8_t* dst) {
+  int n;
+  for (n = 0; n < 32; n += 4) {
+    const __m128i tmp0_1 = GetRGBA32b(y[n + 0], u[n + 0], v[n + 0]);
+    const __m128i tmp0_2 = GetRGBA32b(y[n + 1], u[n + 1], v[n + 1]);
+    const __m128i tmp0_3 = GetRGBA32b(y[n + 2], u[n + 2], v[n + 2]);
+    const __m128i tmp0_4 = GetRGBA32b(y[n + 3], u[n + 3], v[n + 3]);
+    const __m128i tmp1_1 = _mm_packs_epi32(tmp0_1, tmp0_2);
+    const __m128i tmp1_2 = _mm_packs_epi32(tmp0_3, tmp0_4);
+    const __m128i tmp2 = _mm_packus_epi16(tmp1_1, tmp1_2);
+    _mm_storeu_si128((__m128i*)dst, tmp2);
+    dst += 4 * 4;
+  }
+}
+
+void VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
+                    uint8_t* dst) {
+  int n;
+  for (n = 0; n < 32; n += 2) {
+    const __m128i tmp0_1 = GetRGBA32b(y[n + 0], u[n + 0], v[n + 0]);
+    const __m128i tmp0_2 = GetRGBA32b(y[n + 1], u[n + 1], v[n + 1]);
+    const __m128i tmp1_1 = _mm_shuffle_epi32(tmp0_1, _MM_SHUFFLE(3, 0, 1, 2));
+    const __m128i tmp1_2 = _mm_shuffle_epi32(tmp0_2, _MM_SHUFFLE(3, 0, 1, 2));
+    const __m128i tmp2_1 = _mm_packs_epi32(tmp1_1, tmp1_2);
+    const __m128i tmp3 = _mm_packus_epi16(tmp2_1, tmp2_1);
+    _mm_storel_epi64((__m128i*)dst, tmp3);
+    dst += 4 * 2;
+  }
+}
+
+void VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
+                   uint8_t* dst) {
+  int n;
+  uint8_t tmp0[2 * 3 + 5 + 15];
+  uint8_t* const tmp = (uint8_t*)((uintptr_t)(tmp0 + 15) & ~15);  // align
+  for (n = 0; n < 30; ++n) {   // we directly stomp the *dst memory
+    YuvToRgbSSE2(y[n], u[n], v[n], dst + n * 3);
+  }
+  // Last two pixels are special: we write in a tmp buffer before sending
+  // to dst.
+  YuvToRgbSSE2(y[n + 0], u[n + 0], v[n + 0], tmp + 0);
+  YuvToRgbSSE2(y[n + 1], u[n + 1], v[n + 1], tmp + 3);
+  memcpy(dst + n * 3, tmp, 2 * 3);
+}
+
+void VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v,
+                   uint8_t* dst) {
+  int n;
+  uint8_t tmp0[2 * 3 + 5 + 15];
+  uint8_t* const tmp = (uint8_t*)((uintptr_t)(tmp0 + 15) & ~15);  // align
+  for (n = 0; n < 30; ++n) {
+    YuvToBgrSSE2(y[n], u[n], v[n], dst + n * 3);
+  }
+  YuvToBgrSSE2(y[n + 0], u[n + 0], v[n + 0], tmp + 0);
+  YuvToBgrSSE2(y[n + 1], u[n + 1], v[n + 1], tmp + 3);
+  memcpy(dst + n * 3, tmp, 2 * 3);
+}
+
+#endif  // FANCY_UPSAMPLING
+
+//-----------------------------------------------------------------------------
+// Arbitrary-length row conversion functions
+
+static void YuvToRgbaRowSSE2(const uint8_t* y,
+                             const uint8_t* u, const uint8_t* v,
+                             uint8_t* dst, int len) {
+  int n;
+  for (n = 0; n + 4 <= len; n += 4) {
+    const __m128i uv_0 = LoadUVPart(u[0], v[0]);
+    const __m128i uv_1 = LoadUVPart(u[1], v[1]);
+    const __m128i tmp0_1 = GetRGBA32bWithUV(y[0], uv_0);
+    const __m128i tmp0_2 = GetRGBA32bWithUV(y[1], uv_0);
+    const __m128i tmp0_3 = GetRGBA32bWithUV(y[2], uv_1);
+    const __m128i tmp0_4 = GetRGBA32bWithUV(y[3], uv_1);
+    const __m128i tmp1_1 = _mm_packs_epi32(tmp0_1, tmp0_2);
+    const __m128i tmp1_2 = _mm_packs_epi32(tmp0_3, tmp0_4);
+    const __m128i tmp2 = _mm_packus_epi16(tmp1_1, tmp1_2);
+    _mm_storeu_si128((__m128i*)dst, tmp2);
+    dst += 4 * 4;
+    y += 4;
+    u += 2;
+    v += 2;
+  }
+  // Finish off
+  while (n < len) {
+    VP8YuvToRgba(y[0], u[0], v[0], dst);
+    dst += 4;
+    ++y;
+    u += (n & 1);
+    v += (n & 1);
+    ++n;
+  }
+}
+
+static void YuvToBgraRowSSE2(const uint8_t* y,
+                             const uint8_t* u, const uint8_t* v,
+                             uint8_t* dst, int len) {
+  int n;
+  for (n = 0; n + 2 <= len; n += 2) {
+    const __m128i uv_0 = LoadUVPart(u[0], v[0]);
+    const __m128i tmp0_1 = GetRGBA32bWithUV(y[0], uv_0);
+    const __m128i tmp0_2 = GetRGBA32bWithUV(y[1], uv_0);
+    const __m128i tmp1_1 = _mm_shuffle_epi32(tmp0_1, _MM_SHUFFLE(3, 0, 1, 2));
+    const __m128i tmp1_2 = _mm_shuffle_epi32(tmp0_2, _MM_SHUFFLE(3, 0, 1, 2));
+    const __m128i tmp2_1 = _mm_packs_epi32(tmp1_1, tmp1_2);
+    const __m128i tmp3 = _mm_packus_epi16(tmp2_1, tmp2_1);
+    _mm_storel_epi64((__m128i*)dst, tmp3);
+    dst += 4 * 2;
+    y += 2;
+    ++u;
+    ++v;
+  }
+  // Finish off
+  if (len & 1) {
+    VP8YuvToBgra(y[0], u[0], v[0], dst);
+  }
+}
+
+static void YuvToArgbRowSSE2(const uint8_t* y,
+                             const uint8_t* u, const uint8_t* v,
+                             uint8_t* dst, int len) {
+  int n;
+  for (n = 0; n + 2 <= len; n += 2) {
+    const __m128i uv_0 = LoadUVPart(u[0], v[0]);
+    const __m128i tmp0_1 = GetRGBA32bWithUV(y[0], uv_0);
+    const __m128i tmp0_2 = GetRGBA32bWithUV(y[1], uv_0);
+    const __m128i tmp1_1 = _mm_shuffle_epi32(tmp0_1, _MM_SHUFFLE(2, 1, 0, 3));
+    const __m128i tmp1_2 = _mm_shuffle_epi32(tmp0_2, _MM_SHUFFLE(2, 1, 0, 3));
+    const __m128i tmp2_1 = _mm_packs_epi32(tmp1_1, tmp1_2);
+    const __m128i tmp3 = _mm_packus_epi16(tmp2_1, tmp2_1);
+    _mm_storel_epi64((__m128i*)dst, tmp3);
+    dst += 4 * 2;
+    y += 2;
+    ++u;
+    ++v;
+  }
+  // Finish off
+  if (len & 1) {
+    VP8YuvToArgb(y[0], u[0], v[0], dst);
+  }
+}
+
+static void YuvToRgbRowSSE2(const uint8_t* y,
+                            const uint8_t* u, const uint8_t* v,
+                            uint8_t* dst, int len) {
+  int n;
+  for (n = 0; n + 2 < len; ++n) {   // we directly stomp the *dst memory
+    YuvToRgbSSE2(y[0], u[0], v[0], dst);  // stomps 8 bytes
+    dst += 3;
+    ++y;
+    u += (n & 1);
+    v += (n & 1);
+  }
+  VP8YuvToRgb(y[0], u[0], v[0], dst);
+  if (len > 1) {
+    VP8YuvToRgb(y[1], u[n & 1], v[n & 1], dst + 3);
+  }
+}
+
+static void YuvToBgrRowSSE2(const uint8_t* y,
+                            const uint8_t* u, const uint8_t* v,
+                            uint8_t* dst, int len) {
+  int n;
+  for (n = 0; n + 2 < len; ++n) {   // we directly stomp the *dst memory
+    YuvToBgrSSE2(y[0], u[0], v[0], dst);  // stomps 8 bytes
+    dst += 3;
+    ++y;
+    u += (n & 1);
+    v += (n & 1);
+  }
+  VP8YuvToBgr(y[0], u[0], v[0], dst + 0);
+  if (len > 1) {
+    VP8YuvToBgr(y[1], u[n & 1], v[n & 1], dst + 3);
+  }
+}
+
+#endif  // WEBP_USE_SSE2
+
+//------------------------------------------------------------------------------
+// Entry point
+
+extern void WebPInitSamplersSSE2(void);
+
+void WebPInitSamplersSSE2(void) {
+#if defined(WEBP_USE_SSE2)
+  WebPSamplers[MODE_RGB]  = YuvToRgbRowSSE2;
+  WebPSamplers[MODE_RGBA] = YuvToRgbaRowSSE2;
+  WebPSamplers[MODE_BGR]  = YuvToBgrRowSSE2;
+  WebPSamplers[MODE_BGRA] = YuvToBgraRowSSE2;
+  WebPSamplers[MODE_ARGB] = YuvToArgbRowSSE2;
+#endif  // WEBP_USE_SSE2
+}