webp: Make it a module and unbundle libwebp thirdparty files

Note that there are two Godot-specific changes made to libwebp
for the javascript/HTML5 platform. They are documented in the
README.md.

1 files changed, 0 insertions, 795 deletions

diff --git a/drivers/webp/dsp/dec.c b/drivers/webp/dsp/dec.c
deleted file mode 100644
index e92d693362..0000000000
--- a/drivers/webp/dsp/dec.c
+++ /dev/null
@@ -1,795 +0,0 @@
-// Copyright 2010 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.
-// -----------------------------------------------------------------------------
-//
-// Speed-critical decoding functions, default plain-C implementations.
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include "./dsp.h"
-#include "../dec/vp8i.h"
-#include "../utils/utils.h"
-
-//------------------------------------------------------------------------------
-
-static WEBP_INLINE uint8_t clip_8b(int v) {
-  return (!(v & ~0xff)) ? v : (v < 0) ? 0 : 255;
-}
-
-//------------------------------------------------------------------------------
-// Transforms (Paragraph 14.4)
-
-#define STORE(x, y, v) \
-  dst[x + y * BPS] = clip_8b(dst[x + y * BPS] + ((v) >> 3))
-
-#define STORE2(y, dc, d, c) do {    \
-  const int DC = (dc);              \
-  STORE(0, y, DC + (d));            \
-  STORE(1, y, DC + (c));            \
-  STORE(2, y, DC - (c));            \
-  STORE(3, y, DC - (d));            \
-} while (0)
-
-#define MUL1(a) ((((a) * 20091) >> 16) + (a))
-#define MUL2(a) (((a) * 35468) >> 16)
-
-static void TransformOne(const int16_t* in, uint8_t* dst) {
-  int C[4 * 4], *tmp;
-  int i;
-  tmp = C;
-  for (i = 0; i < 4; ++i) {    // vertical pass
-    const int a = in[0] + in[8];    // [-4096, 4094]
-    const int b = in[0] - in[8];    // [-4095, 4095]
-    const int c = MUL2(in[4]) - MUL1(in[12]);   // [-3783, 3783]
-    const int d = MUL1(in[4]) + MUL2(in[12]);   // [-3785, 3781]
-    tmp[0] = a + d;   // [-7881, 7875]
-    tmp[1] = b + c;   // [-7878, 7878]
-    tmp[2] = b - c;   // [-7878, 7878]
-    tmp[3] = a - d;   // [-7877, 7879]
-    tmp += 4;
-    in++;
-  }
-  // Each pass is expanding the dynamic range by ~3.85 (upper bound).
-  // The exact value is (2. + (20091 + 35468) / 65536).
-  // After the second pass, maximum interval is [-3794, 3794], assuming
-  // an input in [-2048, 2047] interval. We then need to add a dst value
-  // in the [0, 255] range.
-  // In the worst case scenario, the input to clip_8b() can be as large as
-  // [-60713, 60968].
-  tmp = C;
-  for (i = 0; i < 4; ++i) {    // horizontal pass
-    const int dc = tmp[0] + 4;
-    const int a =  dc +  tmp[8];
-    const int b =  dc -  tmp[8];
-    const int c = MUL2(tmp[4]) - MUL1(tmp[12]);
-    const int d = MUL1(tmp[4]) + MUL2(tmp[12]);
-    STORE(0, 0, a + d);
-    STORE(1, 0, b + c);
-    STORE(2, 0, b - c);
-    STORE(3, 0, a - d);
-    tmp++;
-    dst += BPS;
-  }
-}
-
-// Simplified transform when only in[0], in[1] and in[4] are non-zero
-static void TransformAC3(const int16_t* in, uint8_t* dst) {
-  const int a = in[0] + 4;
-  const int c4 = MUL2(in[4]);
-  const int d4 = MUL1(in[4]);
-  const int c1 = MUL2(in[1]);
-  const int d1 = MUL1(in[1]);
-  STORE2(0, a + d4, d1, c1);
-  STORE2(1, a + c4, d1, c1);
-  STORE2(2, a - c4, d1, c1);
-  STORE2(3, a - d4, d1, c1);
-}
-#undef MUL1
-#undef MUL2
-#undef STORE2
-
-static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) {
-  TransformOne(in, dst);
-  if (do_two) {
-    TransformOne(in + 16, dst + 4);
-  }
-}
-
-static void TransformUV(const int16_t* in, uint8_t* dst) {
-  VP8Transform(in + 0 * 16, dst, 1);
-  VP8Transform(in + 2 * 16, dst + 4 * BPS, 1);
-}
-
-static void TransformDC(const int16_t* in, uint8_t* dst) {
-  const int DC = in[0] + 4;
-  int i, j;
-  for (j = 0; j < 4; ++j) {
-    for (i = 0; i < 4; ++i) {
-      STORE(i, j, DC);
-    }
-  }
-}
-
-static void TransformDCUV(const int16_t* in, uint8_t* dst) {
-  if (in[0 * 16]) VP8TransformDC(in + 0 * 16, dst);
-  if (in[1 * 16]) VP8TransformDC(in + 1 * 16, dst + 4);
-  if (in[2 * 16]) VP8TransformDC(in + 2 * 16, dst + 4 * BPS);
-  if (in[3 * 16]) VP8TransformDC(in + 3 * 16, dst + 4 * BPS + 4);
-}
-
-#undef STORE
-
-//------------------------------------------------------------------------------
-// Paragraph 14.3
-
-static void TransformWHT(const int16_t* in, int16_t* out) {
-  int tmp[16];
-  int i;
-  for (i = 0; i < 4; ++i) {
-    const int a0 = in[0 + i] + in[12 + i];
-    const int a1 = in[4 + i] + in[ 8 + i];
-    const int a2 = in[4 + i] - in[ 8 + i];
-    const int a3 = in[0 + i] - in[12 + i];
-    tmp[0  + i] = a0 + a1;
-    tmp[8  + i] = a0 - a1;
-    tmp[4  + i] = a3 + a2;
-    tmp[12 + i] = a3 - a2;
-  }
-  for (i = 0; i < 4; ++i) {
-    const int dc = tmp[0 + i * 4] + 3;    // w/ rounder
-    const int a0 = dc             + tmp[3 + i * 4];
-    const int a1 = tmp[1 + i * 4] + tmp[2 + i * 4];
-    const int a2 = tmp[1 + i * 4] - tmp[2 + i * 4];
-    const int a3 = dc             - tmp[3 + i * 4];
-    out[ 0] = (a0 + a1) >> 3;
-    out[16] = (a3 + a2) >> 3;
-    out[32] = (a0 - a1) >> 3;
-    out[48] = (a3 - a2) >> 3;
-    out += 64;
-  }
-}
-
-void (*VP8TransformWHT)(const int16_t* in, int16_t* out);
-
-//------------------------------------------------------------------------------
-// Intra predictions
-
-#define DST(x, y) dst[(x) + (y) * BPS]
-
-static WEBP_INLINE void TrueMotion(uint8_t* dst, int size) {
-  const uint8_t* top = dst - BPS;
-  const uint8_t* const clip0 = VP8kclip1 - top[-1];
-  int y;
-  for (y = 0; y < size; ++y) {
-    const uint8_t* const clip = clip0 + dst[-1];
-    int x;
-    for (x = 0; x < size; ++x) {
-      dst[x] = clip[top[x]];
-    }
-    dst += BPS;
-  }
-}
-static void TM4(uint8_t* dst)   { TrueMotion(dst, 4); }
-static void TM8uv(uint8_t* dst) { TrueMotion(dst, 8); }
-static void TM16(uint8_t* dst)  { TrueMotion(dst, 16); }
-
-//------------------------------------------------------------------------------
-// 16x16
-
-static void VE16(uint8_t* dst) {     // vertical
-  int j;
-  for (j = 0; j < 16; ++j) {
-    memcpy(dst + j * BPS, dst - BPS, 16);
-  }
-}
-
-static void HE16(uint8_t* dst) {     // horizontal
-  int j;
-  for (j = 16; j > 0; --j) {
-    memset(dst, dst[-1], 16);
-    dst += BPS;
-  }
-}
-
-static WEBP_INLINE void Put16(int v, uint8_t* dst) {
-  int j;
-  for (j = 0; j < 16; ++j) {
-    memset(dst + j * BPS, v, 16);
-  }
-}
-
-static void DC16(uint8_t* dst) {    // DC
-  int DC = 16;
-  int j;
-  for (j = 0; j < 16; ++j) {
-    DC += dst[-1 + j * BPS] + dst[j - BPS];
-  }
-  Put16(DC >> 5, dst);
-}
-
-static void DC16NoTop(uint8_t* dst) {   // DC with top samples not available
-  int DC = 8;
-  int j;
-  for (j = 0; j < 16; ++j) {
-    DC += dst[-1 + j * BPS];
-  }
-  Put16(DC >> 4, dst);
-}
-
-static void DC16NoLeft(uint8_t* dst) {  // DC with left samples not available
-  int DC = 8;
-  int i;
-  for (i = 0; i < 16; ++i) {
-    DC += dst[i - BPS];
-  }
-  Put16(DC >> 4, dst);
-}
-
-static void DC16NoTopLeft(uint8_t* dst) {  // DC with no top and left samples
-  Put16(0x80, dst);
-}
-
-VP8PredFunc VP8PredLuma16[NUM_B_DC_MODES];
-
-//------------------------------------------------------------------------------
-// 4x4
-
-#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2)
-#define AVG2(a, b) (((a) + (b) + 1) >> 1)
-
-static void VE4(uint8_t* dst) {    // vertical
-  const uint8_t* top = dst - BPS;
-  const uint8_t vals[4] = {
-    AVG3(top[-1], top[0], top[1]),
-    AVG3(top[ 0], top[1], top[2]),
-    AVG3(top[ 1], top[2], top[3]),
-    AVG3(top[ 2], top[3], top[4])
-  };
-  int i;
-  for (i = 0; i < 4; ++i) {
-    memcpy(dst + i * BPS, vals, sizeof(vals));
-  }
-}
-
-static void HE4(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));
-}
-
-static void DC4(uint8_t* dst) {   // DC
-  uint32_t dc = 4;
-  int i;
-  for (i = 0; i < 4; ++i) dc += dst[i - BPS] + dst[-1 + i * BPS];
-  dc >>= 3;
-  for (i = 0; i < 4; ++i) memset(dst + i * BPS, dc, 4);
-}
-
-static void RD4(uint8_t* dst) {   // Down-right
-  const int I = dst[-1 + 0 * BPS];
-  const int J = dst[-1 + 1 * BPS];
-  const int K = dst[-1 + 2 * BPS];
-  const int L = dst[-1 + 3 * BPS];
-  const int X = dst[-1 - BPS];
-  const int A = dst[0 - BPS];
-  const int B = dst[1 - BPS];
-  const int C = dst[2 - BPS];
-  const int D = dst[3 - BPS];
-  DST(0, 3)                                     = AVG3(J, K, L);
-  DST(1, 3) = DST(0, 2)                         = AVG3(I, J, K);
-  DST(2, 3) = DST(1, 2) = DST(0, 1)             = AVG3(X, I, J);
-  DST(3, 3) = DST(2, 2) = DST(1, 1) = DST(0, 0) = AVG3(A, X, I);
-              DST(3, 2) = DST(2, 1) = DST(1, 0) = AVG3(B, A, X);
-                          DST(3, 1) = DST(2, 0) = AVG3(C, B, A);
-                                      DST(3, 0) = AVG3(D, C, B);
-}
-
-static void LD4(uint8_t* dst) {   // Down-Left
-  const int A = dst[0 - BPS];
-  const int B = dst[1 - BPS];
-  const int C = dst[2 - BPS];
-  const int D = dst[3 - BPS];
-  const int E = dst[4 - BPS];
-  const int F = dst[5 - BPS];
-  const int G = dst[6 - BPS];
-  const int H = dst[7 - BPS];
-  DST(0, 0)                                     = AVG3(A, B, C);
-  DST(1, 0) = DST(0, 1)                         = AVG3(B, C, D);
-  DST(2, 0) = DST(1, 1) = DST(0, 2)             = AVG3(C, D, E);
-  DST(3, 0) = DST(2, 1) = DST(1, 2) = DST(0, 3) = AVG3(D, E, F);
-              DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G);
-                          DST(3, 2) = DST(2, 3) = AVG3(F, G, H);
-                                      DST(3, 3) = AVG3(G, H, H);
-}
-
-static void VR4(uint8_t* dst) {   // Vertical-Right
-  const int I = dst[-1 + 0 * BPS];
-  const int J = dst[-1 + 1 * BPS];
-  const int K = dst[-1 + 2 * BPS];
-  const int X = dst[-1 - BPS];
-  const int A = dst[0 - BPS];
-  const int B = dst[1 - BPS];
-  const int C = dst[2 - BPS];
-  const int D = dst[3 - BPS];
-  DST(0, 0) = DST(1, 2) = AVG2(X, A);
-  DST(1, 0) = DST(2, 2) = AVG2(A, B);
-  DST(2, 0) = DST(3, 2) = AVG2(B, C);
-  DST(3, 0)             = AVG2(C, D);
-
-  DST(0, 3) =             AVG3(K, J, I);
-  DST(0, 2) =             AVG3(J, I, X);
-  DST(0, 1) = DST(1, 3) = AVG3(I, X, A);
-  DST(1, 1) = DST(2, 3) = AVG3(X, A, B);
-  DST(2, 1) = DST(3, 3) = AVG3(A, B, C);
-  DST(3, 1) =             AVG3(B, C, D);
-}
-
-static void VL4(uint8_t* dst) {   // Vertical-Left
-  const int A = dst[0 - BPS];
-  const int B = dst[1 - BPS];
-  const int C = dst[2 - BPS];
-  const int D = dst[3 - BPS];
-  const int E = dst[4 - BPS];
-  const int F = dst[5 - BPS];
-  const int G = dst[6 - BPS];
-  const int H = dst[7 - BPS];
-  DST(0, 0) =             AVG2(A, B);
-  DST(1, 0) = DST(0, 2) = AVG2(B, C);
-  DST(2, 0) = DST(1, 2) = AVG2(C, D);
-  DST(3, 0) = DST(2, 2) = AVG2(D, E);
-
-  DST(0, 1) =             AVG3(A, B, C);
-  DST(1, 1) = DST(0, 3) = AVG3(B, C, D);
-  DST(2, 1) = DST(1, 3) = AVG3(C, D, E);
-  DST(3, 1) = DST(2, 3) = AVG3(D, E, F);
-              DST(3, 2) = AVG3(E, F, G);
-              DST(3, 3) = AVG3(F, G, H);
-}
-
-static void HU4(uint8_t* dst) {   // Horizontal-Up
-  const int I = dst[-1 + 0 * BPS];
-  const int J = dst[-1 + 1 * BPS];
-  const int K = dst[-1 + 2 * BPS];
-  const int L = dst[-1 + 3 * BPS];
-  DST(0, 0) =             AVG2(I, J);
-  DST(2, 0) = DST(0, 1) = AVG2(J, K);
-  DST(2, 1) = DST(0, 2) = AVG2(K, L);
-  DST(1, 0) =             AVG3(I, J, K);
-  DST(3, 0) = DST(1, 1) = AVG3(J, K, L);
-  DST(3, 1) = DST(1, 2) = AVG3(K, L, L);
-  DST(3, 2) = DST(2, 2) =
-    DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L;
-}
-
-static void HD4(uint8_t* dst) {  // Horizontal-Down
-  const int I = dst[-1 + 0 * BPS];
-  const int J = dst[-1 + 1 * BPS];
-  const int K = dst[-1 + 2 * BPS];
-  const int L = dst[-1 + 3 * BPS];
-  const int X = dst[-1 - BPS];
-  const int A = dst[0 - BPS];
-  const int B = dst[1 - BPS];
-  const int C = dst[2 - BPS];
-
-  DST(0, 0) = DST(2, 1) = AVG2(I, X);
-  DST(0, 1) = DST(2, 2) = AVG2(J, I);
-  DST(0, 2) = DST(2, 3) = AVG2(K, J);
-  DST(0, 3)             = AVG2(L, K);
-
-  DST(3, 0)             = AVG3(A, B, C);
-  DST(2, 0)             = AVG3(X, A, B);
-  DST(1, 0) = DST(3, 1) = AVG3(I, X, A);
-  DST(1, 1) = DST(3, 2) = AVG3(J, I, X);
-  DST(1, 2) = DST(3, 3) = AVG3(K, J, I);
-  DST(1, 3)             = AVG3(L, K, J);
-}
-
-#undef DST
-#undef AVG3
-#undef AVG2
-
-VP8PredFunc VP8PredLuma4[NUM_BMODES];
-
-//------------------------------------------------------------------------------
-// Chroma
-
-static void VE8uv(uint8_t* dst) {    // vertical
-  int j;
-  for (j = 0; j < 8; ++j) {
-    memcpy(dst + j * BPS, dst - BPS, 8);
-  }
-}
-
-static void HE8uv(uint8_t* dst) {    // horizontal
-  int j;
-  for (j = 0; j < 8; ++j) {
-    memset(dst, dst[-1], 8);
-    dst += BPS;
-  }
-}
-
-// helper for chroma-DC predictions
-static WEBP_INLINE void Put8x8uv(uint8_t value, uint8_t* dst) {
-  int j;
-  for (j = 0; j < 8; ++j) {
-    memset(dst + j * BPS, value, 8);
-  }
-}
-
-static void DC8uv(uint8_t* dst) {     // DC
-  int dc0 = 8;
-  int i;
-  for (i = 0; i < 8; ++i) {
-    dc0 += dst[i - BPS] + dst[-1 + i * BPS];
-  }
-  Put8x8uv(dc0 >> 4, dst);
-}
-
-static void DC8uvNoLeft(uint8_t* dst) {   // DC with no left samples
-  int dc0 = 4;
-  int i;
-  for (i = 0; i < 8; ++i) {
-    dc0 += dst[i - BPS];
-  }
-  Put8x8uv(dc0 >> 3, dst);
-}
-
-static void DC8uvNoTop(uint8_t* dst) {  // DC with no top samples
-  int dc0 = 4;
-  int i;
-  for (i = 0; i < 8; ++i) {
-    dc0 += dst[-1 + i * BPS];
-  }
-  Put8x8uv(dc0 >> 3, dst);
-}
-
-static void DC8uvNoTopLeft(uint8_t* dst) {    // DC with nothing
-  Put8x8uv(0x80, dst);
-}
-
-VP8PredFunc VP8PredChroma8[NUM_B_DC_MODES];
-
-//------------------------------------------------------------------------------
-// Edge filtering functions
-
-// 4 pixels in, 2 pixels out
-static WEBP_INLINE void do_filter2(uint8_t* p, int step) {
-  const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step];
-  const int a = 3 * (q0 - p0) + VP8ksclip1[p1 - q1];  // in [-893,892]
-  const int a1 = VP8ksclip2[(a + 4) >> 3];            // in [-16,15]
-  const int a2 = VP8ksclip2[(a + 3) >> 3];
-  p[-step] = VP8kclip1[p0 + a2];
-  p[    0] = VP8kclip1[q0 - a1];
-}
-
-// 4 pixels in, 4 pixels out
-static WEBP_INLINE void do_filter4(uint8_t* p, int step) {
-  const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step];
-  const int a = 3 * (q0 - p0);
-  const int a1 = VP8ksclip2[(a + 4) >> 3];
-  const int a2 = VP8ksclip2[(a + 3) >> 3];
-  const int a3 = (a1 + 1) >> 1;
-  p[-2*step] = VP8kclip1[p1 + a3];
-  p[-  step] = VP8kclip1[p0 + a2];
-  p[      0] = VP8kclip1[q0 - a1];
-  p[   step] = VP8kclip1[q1 - a3];
-}
-
-// 6 pixels in, 6 pixels out
-static WEBP_INLINE void do_filter6(uint8_t* p, int step) {
-  const int p2 = p[-3*step], p1 = p[-2*step], p0 = p[-step];
-  const int q0 = p[0], q1 = p[step], q2 = p[2*step];
-  const int a = VP8ksclip1[3 * (q0 - p0) + VP8ksclip1[p1 - q1]];
-  // a is in [-128,127], a1 in [-27,27], a2 in [-18,18] and a3 in [-9,9]
-  const int a1 = (27 * a + 63) >> 7;  // eq. to ((3 * a + 7) * 9) >> 7
-  const int a2 = (18 * a + 63) >> 7;  // eq. to ((2 * a + 7) * 9) >> 7
-  const int a3 = (9  * a + 63) >> 7;  // eq. to ((1 * a + 7) * 9) >> 7
-  p[-3*step] = VP8kclip1[p2 + a3];
-  p[-2*step] = VP8kclip1[p1 + a2];
-  p[-  step] = VP8kclip1[p0 + a1];
-  p[      0] = VP8kclip1[q0 - a1];
-  p[   step] = VP8kclip1[q1 - a2];
-  p[ 2*step] = VP8kclip1[q2 - a3];
-}
-
-static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) {
-  const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step];
-  return (VP8kabs0[p1 - p0] > thresh) || (VP8kabs0[q1 - q0] > thresh);
-}
-
-static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int t) {
-  const int p1 = p[-2 * step], p0 = p[-step], q0 = p[0], q1 = p[step];
-  return ((4 * VP8kabs0[p0 - q0] + VP8kabs0[p1 - q1]) <= t);
-}
-
-static WEBP_INLINE int needs_filter2(const uint8_t* p,
-                                     int step, int t, int it) {
-  const int p3 = p[-4 * step], p2 = p[-3 * step], p1 = p[-2 * step];
-  const int p0 = p[-step], q0 = p[0];
-  const int q1 = p[step], q2 = p[2 * step], q3 = p[3 * step];
-  if ((4 * VP8kabs0[p0 - q0] + VP8kabs0[p1 - q1]) > t) return 0;
-  return VP8kabs0[p3 - p2] <= it && VP8kabs0[p2 - p1] <= it &&
-         VP8kabs0[p1 - p0] <= it && VP8kabs0[q3 - q2] <= it &&
-         VP8kabs0[q2 - q1] <= it && VP8kabs0[q1 - q0] <= it;
-}
-
-//------------------------------------------------------------------------------
-// Simple In-loop filtering (Paragraph 15.2)
-
-static void SimpleVFilter16(uint8_t* p, int stride, int thresh) {
-  int i;
-  const int thresh2 = 2 * thresh + 1;
-  for (i = 0; i < 16; ++i) {
-    if (needs_filter(p + i, stride, thresh2)) {
-      do_filter2(p + i, stride);
-    }
-  }
-}
-
-static void SimpleHFilter16(uint8_t* p, int stride, int thresh) {
-  int i;
-  const int thresh2 = 2 * thresh + 1;
-  for (i = 0; i < 16; ++i) {
-    if (needs_filter(p + i * stride, 1, thresh2)) {
-      do_filter2(p + i * stride, 1);
-    }
-  }
-}
-
-static void SimpleVFilter16i(uint8_t* p, int stride, int thresh) {
-  int k;
-  for (k = 3; k > 0; --k) {
-    p += 4 * stride;
-    SimpleVFilter16(p, stride, thresh);
-  }
-}
-
-static void SimpleHFilter16i(uint8_t* p, int stride, int thresh) {
-  int k;
-  for (k = 3; k > 0; --k) {
-    p += 4;
-    SimpleHFilter16(p, stride, thresh);
-  }
-}
-
-//------------------------------------------------------------------------------
-// Complex In-loop filtering (Paragraph 15.3)
-
-static WEBP_INLINE void FilterLoop26(uint8_t* p,
-                                     int hstride, int vstride, int size,
-                                     int thresh, int ithresh, int hev_thresh) {
-  const int thresh2 = 2 * thresh + 1;
-  while (size-- > 0) {
-    if (needs_filter2(p, hstride, thresh2, ithresh)) {
-      if (hev(p, hstride, hev_thresh)) {
-        do_filter2(p, hstride);
-      } else {
-        do_filter6(p, hstride);
-      }
-    }
-    p += vstride;
-  }
-}
-
-static WEBP_INLINE void FilterLoop24(uint8_t* p,
-                                     int hstride, int vstride, int size,
-                                     int thresh, int ithresh, int hev_thresh) {
-  const int thresh2 = 2 * thresh + 1;
-  while (size-- > 0) {
-    if (needs_filter2(p, hstride, thresh2, ithresh)) {
-      if (hev(p, hstride, hev_thresh)) {
-        do_filter2(p, hstride);
-      } else {
-        do_filter4(p, hstride);
-      }
-    }
-    p += vstride;
-  }
-}
-
-// on macroblock edges
-static void VFilter16(uint8_t* p, int stride,
-                      int thresh, int ithresh, int hev_thresh) {
-  FilterLoop26(p, stride, 1, 16, thresh, ithresh, hev_thresh);
-}
-
-static void HFilter16(uint8_t* p, int stride,
-                      int thresh, int ithresh, int hev_thresh) {
-  FilterLoop26(p, 1, stride, 16, thresh, ithresh, hev_thresh);
-}
-
-// on three inner edges
-static void VFilter16i(uint8_t* p, int stride,
-                       int thresh, int ithresh, int hev_thresh) {
-  int k;
-  for (k = 3; k > 0; --k) {
-    p += 4 * stride;
-    FilterLoop24(p, stride, 1, 16, thresh, ithresh, hev_thresh);
-  }
-}
-
-static void HFilter16i(uint8_t* p, int stride,
-                       int thresh, int ithresh, int hev_thresh) {
-  int k;
-  for (k = 3; k > 0; --k) {
-    p += 4;
-    FilterLoop24(p, 1, stride, 16, thresh, ithresh, hev_thresh);
-  }
-}
-
-// 8-pixels wide variant, for chroma filtering
-static void VFilter8(uint8_t* u, uint8_t* v, int stride,
-                     int thresh, int ithresh, int hev_thresh) {
-  FilterLoop26(u, stride, 1, 8, thresh, ithresh, hev_thresh);
-  FilterLoop26(v, stride, 1, 8, thresh, ithresh, hev_thresh);
-}
-
-static void HFilter8(uint8_t* u, uint8_t* v, int stride,
-                     int thresh, int ithresh, int hev_thresh) {
-  FilterLoop26(u, 1, stride, 8, thresh, ithresh, hev_thresh);
-  FilterLoop26(v, 1, stride, 8, thresh, ithresh, hev_thresh);
-}
-
-static void VFilter8i(uint8_t* u, uint8_t* v, int stride,
-                      int thresh, int ithresh, int hev_thresh) {
-  FilterLoop24(u + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh);
-  FilterLoop24(v + 4 * stride, stride, 1, 8, thresh, ithresh, hev_thresh);
-}
-
-static void HFilter8i(uint8_t* u, uint8_t* v, int stride,
-                      int thresh, int ithresh, int hev_thresh) {
-  FilterLoop24(u + 4, 1, stride, 8, thresh, ithresh, hev_thresh);
-  FilterLoop24(v + 4, 1, stride, 8, thresh, ithresh, hev_thresh);
-}
-
-//------------------------------------------------------------------------------
-
-static void DitherCombine8x8(const uint8_t* dither, uint8_t* dst,
-                             int dst_stride) {
-  int i, j;
-  for (j = 0; j < 8; ++j) {
-    for (i = 0; i < 8; ++i) {
-      const int delta0 = dither[i] - VP8_DITHER_AMP_CENTER;
-      const int delta1 =
-          (delta0 + VP8_DITHER_DESCALE_ROUNDER) >> VP8_DITHER_DESCALE;
-      dst[i] = clip_8b((int)dst[i] + delta1);
-    }
-    dst += dst_stride;
-    dither += 8;
-  }
-}
-
-//------------------------------------------------------------------------------
-
-VP8DecIdct2 VP8Transform;
-VP8DecIdct VP8TransformAC3;
-VP8DecIdct VP8TransformUV;
-VP8DecIdct VP8TransformDC;
-VP8DecIdct VP8TransformDCUV;
-
-VP8LumaFilterFunc VP8VFilter16;
-VP8LumaFilterFunc VP8HFilter16;
-VP8ChromaFilterFunc VP8VFilter8;
-VP8ChromaFilterFunc VP8HFilter8;
-VP8LumaFilterFunc VP8VFilter16i;
-VP8LumaFilterFunc VP8HFilter16i;
-VP8ChromaFilterFunc VP8VFilter8i;
-VP8ChromaFilterFunc VP8HFilter8i;
-VP8SimpleFilterFunc VP8SimpleVFilter16;
-VP8SimpleFilterFunc VP8SimpleHFilter16;
-VP8SimpleFilterFunc VP8SimpleVFilter16i;
-VP8SimpleFilterFunc VP8SimpleHFilter16i;
-
-void (*VP8DitherCombine8x8)(const uint8_t* dither, uint8_t* dst,
-                            int dst_stride);
-
-extern void VP8DspInitSSE2(void);
-extern void VP8DspInitSSE41(void);
-extern void VP8DspInitNEON(void);
-extern void VP8DspInitMIPS32(void);
-extern void VP8DspInitMIPSdspR2(void);
-extern void VP8DspInitMSA(void);
-
-static volatile VP8CPUInfo dec_last_cpuinfo_used =
-    (VP8CPUInfo)&dec_last_cpuinfo_used;
-
-WEBP_TSAN_IGNORE_FUNCTION void VP8DspInit(void) {
-  if (dec_last_cpuinfo_used == VP8GetCPUInfo) return;
-
-  VP8InitClipTables();
-
-  VP8TransformWHT = TransformWHT;
-  VP8Transform = TransformTwo;
-  VP8TransformUV = TransformUV;
-  VP8TransformDC = TransformDC;
-  VP8TransformDCUV = TransformDCUV;
-  VP8TransformAC3 = TransformAC3;
-
-  VP8VFilter16 = VFilter16;
-  VP8HFilter16 = HFilter16;
-  VP8VFilter8 = VFilter8;
-  VP8HFilter8 = HFilter8;
-  VP8VFilter16i = VFilter16i;
-  VP8HFilter16i = HFilter16i;
-  VP8VFilter8i = VFilter8i;
-  VP8HFilter8i = HFilter8i;
-  VP8SimpleVFilter16 = SimpleVFilter16;
-  VP8SimpleHFilter16 = SimpleHFilter16;
-  VP8SimpleVFilter16i = SimpleVFilter16i;
-  VP8SimpleHFilter16i = SimpleHFilter16i;
-
-  VP8PredLuma4[0] = DC4;
-  VP8PredLuma4[1] = TM4;
-  VP8PredLuma4[2] = VE4;
-  VP8PredLuma4[3] = HE4;
-  VP8PredLuma4[4] = RD4;
-  VP8PredLuma4[5] = VR4;
-  VP8PredLuma4[6] = LD4;
-  VP8PredLuma4[7] = VL4;
-  VP8PredLuma4[8] = HD4;
-  VP8PredLuma4[9] = HU4;
-
-  VP8PredLuma16[0] = DC16;
-  VP8PredLuma16[1] = TM16;
-  VP8PredLuma16[2] = VE16;
-  VP8PredLuma16[3] = HE16;
-  VP8PredLuma16[4] = DC16NoTop;
-  VP8PredLuma16[5] = DC16NoLeft;
-  VP8PredLuma16[6] = DC16NoTopLeft;
-
-  VP8PredChroma8[0] = DC8uv;
-  VP8PredChroma8[1] = TM8uv;
-  VP8PredChroma8[2] = VE8uv;
-  VP8PredChroma8[3] = HE8uv;
-  VP8PredChroma8[4] = DC8uvNoTop;
-  VP8PredChroma8[5] = DC8uvNoLeft;
-  VP8PredChroma8[6] = DC8uvNoTopLeft;
-
-  VP8DitherCombine8x8 = DitherCombine8x8;
-
-  // If defined, use CPUInfo() to overwrite some pointers with faster versions.
-  if (VP8GetCPUInfo != NULL) {
-#if defined(WEBP_USE_SSE2)
-    if (VP8GetCPUInfo(kSSE2)) {
-      VP8DspInitSSE2();
-#if defined(WEBP_USE_SSE41)
-      if (VP8GetCPUInfo(kSSE4_1)) {
-        VP8DspInitSSE41();
-      }
-#endif
-    }
-#endif
-#if defined(WEBP_USE_NEON)
-    if (VP8GetCPUInfo(kNEON)) {
-      VP8DspInitNEON();
-    }
-#endif
-#if defined(WEBP_USE_MIPS32)
-    if (VP8GetCPUInfo(kMIPS32)) {
-      VP8DspInitMIPS32();
-    }
-#endif
-#if defined(WEBP_USE_MIPS_DSP_R2)
-    if (VP8GetCPUInfo(kMIPSdspR2)) {
-      VP8DspInitMIPSdspR2();
-    }
-#endif
-#if defined(WEBP_USE_MSA)
-    if (VP8GetCPUInfo(kMSA)) {
-      VP8DspInitMSA();
-    }
-#endif
-  }
-  dec_last_cpuinfo_used = VP8GetCPUInfo;
-}