libwebp: update to 0.5.0

third_party/libwebp/dsp/upsampling_mips_dsp_r2.c

-// Copyright 2011 Google Inc. All Rights Reserved.
+// 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 to RGB upsampling functions.
 //
-// Author: somnath@google.com (Somnath Banerjee)
+// Author(s): Branimir Vasic (branimir.vasic@imgtec.com)
+//            Djordje Pesut  (djordje.pesut@imgtec.com)
 
 #include "./dsp.h"
+
+// Code is disabled for now, in favor of the plain-C version
+// TODO(djordje.pesut): adapt the code to reflect the C-version.
+#if 0 // defined(WEBP_USE_MIPS_DSP_R2)
+
+#include <assert.h>
 #include "./yuv.h"
 
-#include <assert.h>
+#if !defined(WEBP_YUV_USE_TABLE)
+
+#define YUV_TO_RGB(Y, U, V, R, G, B) do {                                      \
+    const int t1 = kYScale * Y;                                                \
+    const int t2 = kVToG * V;                                                  \
+    R = kVToR * V;                                                             \
+    G = kUToG * U;                                                             \
+    B = kUToB * U;                                                             \
+    R = t1 + R;                                                                \
+    G = t1 - G;                                                                \
+    B = t1 + B;                                                                \
+    R = R + kRCst;                                                             \
+    G = G - t2 + kGCst;                                                        \
+    B = B + kBCst;                                                             \
+    __asm__ volatile (                                                         \
+      "shll_s.w         %[" #R "],      %[" #R "],        9          \n\t"     \
+      "shll_s.w         %[" #G "],      %[" #G "],        9          \n\t"     \
+      "shll_s.w         %[" #B "],      %[" #B "],        9          \n\t"     \
+      "precrqu_s.qb.ph  %[" #R "],      %[" #R "],        $zero      \n\t"     \
+      "precrqu_s.qb.ph  %[" #G "],      %[" #G "],        $zero      \n\t"     \
+      "precrqu_s.qb.ph  %[" #B "],      %[" #B "],        $zero      \n\t"     \
+      "srl              %[" #R "],      %[" #R "],        24         \n\t"     \
+      "srl              %[" #G "],      %[" #G "],        24         \n\t"     \
+      "srl              %[" #B "],      %[" #B "],        24         \n\t"     \
+      : [R]"+r"(R), [G]"+r"(G), [B]"+r"(B)                                     \
+      :                                                                        \
+    );                                                                         \
+  } while (0)
+
+static WEBP_INLINE void YuvToRgb(int y, int u, int v, uint8_t* const rgb) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  rgb[0] = r;
+  rgb[1] = g;
+  rgb[2] = b;
+}
+static WEBP_INLINE void YuvToBgr(int y, int u, int v, uint8_t* const bgr) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  bgr[0] = b;
+  bgr[1] = g;
+  bgr[2] = r;
+}
+static WEBP_INLINE void YuvToRgb565(int y, int u, int v, uint8_t* const rgb) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  {
+    const int rg = (r & 0xf8) | (g >> 5);
+    const int gb = ((g << 3) & 0xe0) | (b >> 3);
+#ifdef WEBP_SWAP_16BIT_CSP
+    rgb[0] = gb;
+    rgb[1] = rg;
+#else
+    rgb[0] = rg;
+    rgb[1] = gb;
+#endif
+  }
+}
+static WEBP_INLINE void YuvToRgba4444(int y, int u, int v,
+                                      uint8_t* const argb) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  {
+    const int rg = (r & 0xf0) | (g >> 4);
+    const int ba = (b & 0xf0) | 0x0f;     // overwrite the lower 4 bits
+#ifdef WEBP_SWAP_16BIT_CSP
+    argb[0] = ba;
+    argb[1] = rg;
+#else
+    argb[0] = rg;
+    argb[1] = ba;
+#endif
+   }
+}
+#endif  // WEBP_YUV_USE_TABLE
+
+//-----------------------------------------------------------------------------
+// Alpha handling variants
+
+static WEBP_INLINE void YuvToArgb(uint8_t y, uint8_t u, uint8_t v,
+                                  uint8_t* const argb) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  argb[0] = 0xff;
+  argb[1] = r;
+  argb[2] = g;
+  argb[3] = b;
+}
+static WEBP_INLINE void YuvToBgra(uint8_t y, uint8_t u, uint8_t v,
+                                  uint8_t* const bgra) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  bgra[0] = b;
+  bgra[1] = g;
+  bgra[2] = r;
+  bgra[3] = 0xff;
+}
+static WEBP_INLINE void YuvToRgba(uint8_t y, uint8_t u, uint8_t v,
+                                  uint8_t* const rgba) {
+  int r, g, b;
+  YUV_TO_RGB(y, u, v, r, g, b);
+  rgba[0] = r;
+  rgba[1] = g;
+  rgba[2] = b;
+  rgba[3] = 0xff;
+}
 
 //------------------------------------------------------------------------------
 // Fancy upsampler
 
 #ifdef FANCY_UPSAMPLING
 
-// Fancy upsampling functions to convert YUV to RGB
-WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST];
-
 // Given samples laid out in a square as:
 //  [a b]
 //  [c d]
 // we interpolate u/v as:
 //  ([9*a + 3*b + 3*c +   d    3*a + 9*b + 3*c +   d] + [8 8]) / 16
 //  ([3*a +   b + 9*c + 3*d      a + 3*b + 3*c + 9*d]   [8 8]) / 16
 
 // We process u and v together stashed into 32bit (16bit each).
 #define LOAD_UV(u, v) ((u) | ((v) << 16))
 
@@ skipping 49 matching lines @@
     }                                                                          \
     if (bottom_y != NULL) {                                                    \
       const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2;              \
       FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16),                         \
            bottom_dst + (len - 1) * XSTEP);                                    \
     }                                                                          \
   }                                                                            \
 }
 
 // All variants implemented.
-UPSAMPLE_FUNC(UpsampleRgbLinePair,  VP8YuvToRgb,  3)
-UPSAMPLE_FUNC(UpsampleBgrLinePair,  VP8YuvToBgr,  3)
-UPSAMPLE_FUNC(UpsampleRgbaLinePair, VP8YuvToRgba, 4)
-UPSAMPLE_FUNC(UpsampleBgraLinePair, VP8YuvToBgra, 4)
-UPSAMPLE_FUNC(UpsampleArgbLinePair, VP8YuvToArgb, 4)
-UPSAMPLE_FUNC(UpsampleRgba4444LinePair, VP8YuvToRgba4444, 2)
-UPSAMPLE_FUNC(UpsampleRgb565LinePair,  VP8YuvToRgb565,  2)
+UPSAMPLE_FUNC(UpsampleRgbLinePair,      YuvToRgb,      3)
+UPSAMPLE_FUNC(UpsampleBgrLinePair,      YuvToBgr,      3)
+UPSAMPLE_FUNC(UpsampleRgbaLinePair,     YuvToRgba,     4)
+UPSAMPLE_FUNC(UpsampleBgraLinePair,     YuvToBgra,     4)
+UPSAMPLE_FUNC(UpsampleArgbLinePair,     YuvToArgb,     4)
+UPSAMPLE_FUNC(UpsampleRgba4444LinePair, YuvToRgba4444, 2)
+UPSAMPLE_FUNC(UpsampleRgb565LinePair,   YuvToRgb565,   2)
 
 #undef LOAD_UV
 #undef UPSAMPLE_FUNC
 
-#endif  // FANCY_UPSAMPLING
+//------------------------------------------------------------------------------
+// Entry point
 
-//------------------------------------------------------------------------------
+extern void WebPInitUpsamplersMIPSdspR2(void);
 
-#if !defined(FANCY_UPSAMPLING)
-#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC)                                      \
-static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y,              \
-                      const uint8_t* top_u, const uint8_t* top_v,              \
-                      const uint8_t* bot_u, const uint8_t* bot_v,              \
-                      uint8_t* top_dst, uint8_t* bot_dst, int len) {           \
-  const int half_len = len >> 1;                                               \
-  int x;                                                                       \
-  assert(top_dst != NULL);                                                     \
-  {                                                                            \
-    for (x = 0; x < half_len; ++x) {                                           \
-      FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0);         \
-      FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4);         \
-    }                                                                          \
-    if (len & 1) FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x);  \
-  }                                                                            \
-  if (bot_dst != NULL) {                                                       \
-    for (x = 0; x < half_len; ++x) {                                           \
-      FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x + 0);         \
-      FUNC(bot_y[2 * x + 1], bot_u[x], bot_v[x], bot_dst + 8 * x + 4);         \
-    }                                                                          \
-    if (len & 1) FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x);  \
-  }                                                                            \
+WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplersMIPSdspR2(void) {
+  WebPUpsamplers[MODE_RGB]       = UpsampleRgbLinePair;
+  WebPUpsamplers[MODE_RGBA]      = UpsampleRgbaLinePair;
+  WebPUpsamplers[MODE_BGR]       = UpsampleBgrLinePair;
+  WebPUpsamplers[MODE_BGRA]      = UpsampleBgraLinePair;
+  WebPUpsamplers[MODE_ARGB]      = UpsampleArgbLinePair;
+  WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair;
+  WebPUpsamplers[MODE_RGB_565]   = UpsampleRgb565LinePair;
+  WebPUpsamplers[MODE_rgbA]      = UpsampleRgbaLinePair;
+  WebPUpsamplers[MODE_bgrA]      = UpsampleBgraLinePair;
+  WebPUpsamplers[MODE_Argb]      = UpsampleArgbLinePair;
+  WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair;
 }
 
-DUAL_SAMPLE_FUNC(DualLineSamplerBGRA, VP8YuvToBgra)
-DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb)
-#undef DUAL_SAMPLE_FUNC
-
-#endif  // !FANCY_UPSAMPLING
-
-WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) {
-  WebPInitUpsamplers();
-  VP8YUVInit();
-#ifdef FANCY_UPSAMPLING
-  return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB];
-#else
-  return (alpha_is_last ? DualLineSamplerBGRA : DualLineSamplerARGB);
-#endif
-}
+#endif  // FANCY_UPSAMPLING
 
 //------------------------------------------------------------------------------
 // YUV444 converter
 
 #define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP)                                    \
 static void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v,    \
                       uint8_t* dst, int len) {                                 \
   int i;                                                                       \
   for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * XSTEP]);           \
 }
 
-YUV444_FUNC(Yuv444ToRgb,      VP8YuvToRgb,  3)
-YUV444_FUNC(Yuv444ToBgr,      VP8YuvToBgr,  3)
-YUV444_FUNC(Yuv444ToRgba,     VP8YuvToRgba, 4)
-YUV444_FUNC(Yuv444ToBgra,     VP8YuvToBgra, 4)
-YUV444_FUNC(Yuv444ToArgb,     VP8YuvToArgb, 4)
-YUV444_FUNC(Yuv444ToRgba4444, VP8YuvToRgba4444, 2)
-YUV444_FUNC(Yuv444ToRgb565,   VP8YuvToRgb565, 2)
+YUV444_FUNC(Yuv444ToRgb,      YuvToRgb,      3)
+YUV444_FUNC(Yuv444ToBgr,      YuvToBgr,      3)
+YUV444_FUNC(Yuv444ToRgba,     YuvToRgba,     4)
+YUV444_FUNC(Yuv444ToBgra,     YuvToBgra,     4)
+YUV444_FUNC(Yuv444ToArgb,     YuvToArgb,     4)
+YUV444_FUNC(Yuv444ToRgba4444, YuvToRgba4444, 2)
+YUV444_FUNC(Yuv444ToRgb565,   YuvToRgb565,   2)
 
 #undef YUV444_FUNC
 
-const WebPYUV444Converter WebPYUV444Converters[MODE_LAST] = {
-  Yuv444ToRgb,       // MODE_RGB
-  Yuv444ToRgba,      // MODE_RGBA
-  Yuv444ToBgr,       // MODE_BGR
-  Yuv444ToBgra,      // MODE_BGRA
-  Yuv444ToArgb,      // MODE_ARGB
-  Yuv444ToRgba4444,  // MODE_RGBA_4444
-  Yuv444ToRgb565,    // MODE_RGB_565
-  Yuv444ToRgba,      // MODE_rgbA
-  Yuv444ToBgra,      // MODE_bgrA
-  Yuv444ToArgb,      // MODE_Argb
-  Yuv444ToRgba4444   // MODE_rgbA_4444
-};
+//------------------------------------------------------------------------------
+// Entry point
 
-//------------------------------------------------------------------------------
-// Main calls
+extern void WebPInitYUV444ConvertersMIPSdspR2(void);
 
-extern void WebPInitUpsamplersSSE2(void);
-extern void WebPInitUpsamplersNEON(void);
-
-static volatile VP8CPUInfo upsampling_last_cpuinfo_used2 =
-    (VP8CPUInfo)&upsampling_last_cpuinfo_used2;
-
-void WebPInitUpsamplers(void) {
-  if (upsampling_last_cpuinfo_used2 == VP8GetCPUInfo) return;
-
-#ifdef FANCY_UPSAMPLING
-  WebPUpsamplers[MODE_RGB]       = UpsampleRgbLinePair;
-  WebPUpsamplers[MODE_RGBA]      = UpsampleRgbaLinePair;
-  WebPUpsamplers[MODE_BGR]       = UpsampleBgrLinePair;
-  WebPUpsamplers[MODE_BGRA]      = UpsampleBgraLinePair;
-  WebPUpsamplers[MODE_ARGB]      = UpsampleArgbLinePair;
-  WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair;
-  WebPUpsamplers[MODE_RGB_565]   = UpsampleRgb565LinePair;
-  WebPUpsamplers[MODE_rgbA]      = UpsampleRgbaLinePair;
-  WebPUpsamplers[MODE_bgrA]      = UpsampleBgraLinePair;
-  WebPUpsamplers[MODE_Argb]      = UpsampleArgbLinePair;
-  WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair;
-
-  // If defined, use CPUInfo() to overwrite some pointers with faster versions.
-  if (VP8GetCPUInfo != NULL) {
-#if defined(WEBP_USE_SSE2)
-    if (VP8GetCPUInfo(kSSE2)) {
-      WebPInitUpsamplersSSE2();
-    }
-#endif
-#if defined(WEBP_USE_NEON)
-    if (VP8GetCPUInfo(kNEON)) {
-      WebPInitUpsamplersNEON();
-    }
-#endif
-  }
-#endif  // FANCY_UPSAMPLING
-  upsampling_last_cpuinfo_used2 = VP8GetCPUInfo;
+WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444ConvertersMIPSdspR2(void) {
+  WebPYUV444Converters[MODE_RGB]       = Yuv444ToRgb;
+  WebPYUV444Converters[MODE_RGBA]      = Yuv444ToRgba;
+  WebPYUV444Converters[MODE_BGR]       = Yuv444ToBgr;
+  WebPYUV444Converters[MODE_BGRA]      = Yuv444ToBgra;
+  WebPYUV444Converters[MODE_ARGB]      = Yuv444ToArgb;
+  WebPYUV444Converters[MODE_RGBA_4444] = Yuv444ToRgba4444;
+  WebPYUV444Converters[MODE_RGB_565]   = Yuv444ToRgb565;
+  WebPYUV444Converters[MODE_rgbA]      = Yuv444ToRgba;
+  WebPYUV444Converters[MODE_bgrA]      = Yuv444ToBgra;
+  WebPYUV444Converters[MODE_Argb]      = Yuv444ToArgb;
+  WebPYUV444Converters[MODE_rgbA_4444] = Yuv444ToRgba4444;
 }
 
-//------------------------------------------------------------------------------
+#else  // !WEBP_USE_MIPS_DSP_R2
+
+WEBP_DSP_INIT_STUB(WebPInitYUV444ConvertersMIPSdspR2)
+
+#endif  // WEBP_USE_MIPS_DSP_R2
+
+#if 1  // !(defined(FANCY_UPSAMPLING) && defined(WEBP_USE_MIPS_DSP_R2))
+WEBP_DSP_INIT_STUB(WebPInitUpsamplersMIPSdspR2)
+#endif