Import libwebp image decoder library
Import libwebp image decoder library as external static library, as
preamble to adding support for WebP decoding into skia.
Change-Id: Ifee49924e73e72f875d13177702f2a0f19b5f9b0
diff --git a/src/dsp.c b/src/dsp.c
new file mode 100644
index 0000000..a64a9be
--- /dev/null
+++ b/src/dsp.c
@@ -0,0 +1,694 @@
+// Copyright 2010 Google Inc.
+//
+// This code is licensed under the same terms as WebM:
+// Software License Agreement: http://www.webmproject.org/license/software/
+// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
+// -----------------------------------------------------------------------------
+//
+// speed-critical functions.
+//
+// Author: Skal (pascal.massimino@gmail.com)
+
+#include "vp8i.h"
+
+#if defined(__SSE2__)
+#include <emmintrin.h>
+#endif
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+//-----------------------------------------------------------------------------
+// run-time tables (~4k)
+
+static uint8_t abs0[255 + 255 + 1]; // abs(i)
+static uint8_t abs1[255 + 255 + 1]; // abs(i)>>1
+static int8_t sclip1[1020 + 1020 + 1]; // clips [-1020, 1020] to [-128, 127]
+static int8_t sclip2[112 + 112 + 1]; // clips [-112, 112] to [-16, 15]
+static uint8_t clip1[255 + 510 + 1]; // clips [-255,510] to [0,255]
+
+static int tables_ok = 0;
+
+void VP8DspInitTables() {
+ if (!tables_ok) {
+ int i;
+ for (i = -255; i <= 255; ++i) {
+ abs0[255 + i] = (i < 0) ? -i : i;
+ abs1[255 + i] = abs0[255 + i] >> 1;
+ }
+ for (i = -1020; i <= 1020; ++i) {
+ sclip1[1020 + i] = (i < -128) ? -128 : (i > 127) ? 127 : i;
+ }
+ for (i = -112; i <= 112; ++i) {
+ sclip2[112 + i] = (i < -16) ? -16 : (i > 15) ? 15 : i;
+ }
+ for (i = -255; i <= 255 + 255; ++i) {
+ clip1[255 + i] = (i < 0) ? 0 : (i > 255) ? 255 : i;
+ }
+ tables_ok = 1;
+ }
+}
+
+static 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))
+
+static const int kC1 = 20091 + (1 << 16);
+static const int kC2 = 35468;
+#define MUL(a, b) (((a) * (b)) >> 16)
+
+static void Transform(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 = MUL(in[4], kC2) - MUL(in[12], kC1); // [-3783, 3783]
+ const int d = MUL(in[4], kC1) + MUL(in[12], kC2); // [-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. + (kC1 + kC2) / 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 = MUL(tmp[4], kC2) - MUL(tmp[12], kC1);
+ const int d = MUL(tmp[4], kC1) + MUL(tmp[12], kC2);
+ STORE(0, 0, a + d);
+ STORE(1, 0, b + c);
+ STORE(2, 0, b - c);
+ STORE(3, 0, a - d);
+ tmp++;
+ dst += BPS;
+ }
+}
+#undef MUL
+
+static void TransformUV(const int16_t* in, uint8_t* dst) {
+ Transform(in + 0 * 16, dst);
+ Transform(in + 1 * 16, dst + 4);
+ Transform(in + 2 * 16, dst + 4 * BPS);
+ Transform(in + 3 * 16, dst + 4 * BPS + 4);
+}
+
+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]) TransformDC(in + 0 * 16, dst);
+ if (in[1 * 16]) TransformDC(in + 1 * 16, dst + 4);
+ if (in[2 * 16]) TransformDC(in + 2 * 16, dst + 4 * BPS);
+ if (in[3 * 16]) TransformDC(in + 3 * 16, dst + 4 * BPS + 4);
+}
+
+#undef STORE
+
+// default C implementations:
+VP8Idct VP8Transform = Transform;
+VP8Idct VP8TransformUV = TransformUV;
+VP8Idct VP8TransformDC = TransformDC;
+VP8Idct VP8TransformDCUV = TransformDCUV;
+
+//-----------------------------------------------------------------------------
+// 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) = TransformWHT;
+
+//-----------------------------------------------------------------------------
+// Intra predictions
+
+#define OUT(x, y) dst[(x) + (y) * BPS]
+
+static inline void TrueMotion(uint8_t *dst, int size) {
+ const uint8_t* top = dst - BPS;
+ const uint8_t* const clip0 = clip1 + 255 - 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 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);
+}
+
+//-----------------------------------------------------------------------------
+// 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];
+ *(uint32_t*)(dst + 0 * BPS) = 0x01010101U * AVG3(A, B, C);
+ *(uint32_t*)(dst + 1 * BPS) = 0x01010101U * AVG3(B, C, D);
+ *(uint32_t*)(dst + 2 * BPS) = 0x01010101U * AVG3(C, D, E);
+ *(uint32_t*)(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];
+ OUT(0, 3) = AVG3(J, K, L);
+ OUT(0, 2) = OUT(1, 3) = AVG3(I, J, K);
+ OUT(0, 1) = OUT(1, 2) = OUT(2, 3) = AVG3(X, I, J);
+ OUT(0, 0) = OUT(1, 1) = OUT(2, 2) = OUT(3, 3) = AVG3(A, X, I);
+ OUT(1, 0) = OUT(2, 1) = OUT(3, 2) = AVG3(B, A, X);
+ OUT(2, 0) = OUT(3, 1) = AVG3(C, B, A);
+ OUT(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];
+ OUT(0, 0) = AVG3(A, B, C);
+ OUT(1, 0) = OUT(0, 1) = AVG3(B, C, D);
+ OUT(2, 0) = OUT(1, 1) = OUT(0, 2) = AVG3(C, D, E);
+ OUT(3, 0) = OUT(2, 1) = OUT(1, 2) = OUT(0, 3) = AVG3(D, E, F);
+ OUT(3, 1) = OUT(2, 2) = OUT(1, 3) = AVG3(E, F, G);
+ OUT(3, 2) = OUT(2, 3) = AVG3(F, G, H);
+ OUT(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];
+ OUT(0, 0) = OUT(1, 2) = AVG2(X, A);
+ OUT(1, 0) = OUT(2, 2) = AVG2(A, B);
+ OUT(2, 0) = OUT(3, 2) = AVG2(B, C);
+ OUT(3, 0) = AVG2(C, D);
+
+ OUT(0, 3) = AVG3(K, J, I);
+ OUT(0, 2) = AVG3(J, I, X);
+ OUT(0, 1) = OUT(1, 3) = AVG3(I, X, A);
+ OUT(1, 1) = OUT(2, 3) = AVG3(X, A, B);
+ OUT(2, 1) = OUT(3, 3) = AVG3(A, B, C);
+ OUT(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];
+ OUT(0, 0) = AVG2(A, B);
+ OUT(1, 0) = OUT(0, 2) = AVG2(B, C);
+ OUT(2, 0) = OUT(1, 2) = AVG2(C, D);
+ OUT(3, 0) = OUT(2, 2) = AVG2(D, E);
+
+ OUT(0, 1) = AVG3(A, B, C);
+ OUT(1, 1) = OUT(0, 3) = AVG3(B, C, D);
+ OUT(2, 1) = OUT(1, 3) = AVG3(C, D, E);
+ OUT(3, 1) = OUT(2, 3) = AVG3(D, E, F);
+ OUT(3, 2) = AVG3(E, F, G);
+ OUT(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];
+ OUT(0, 0) = AVG2(I, J);
+ OUT(2, 0) = OUT(0, 1) = AVG2(J, K);
+ OUT(2, 1) = OUT(0, 2) = AVG2(K, L);
+ OUT(1, 0) = AVG3(I, J, K);
+ OUT(3, 0) = OUT(1, 1) = AVG3(J, K, L);
+ OUT(3, 1) = OUT(1, 2) = AVG3(K, L, L);
+ OUT(3, 2) = OUT(2, 2) =
+ OUT(0, 3) = OUT(1, 3) = OUT(2, 3) = OUT(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];
+
+ OUT(0, 0) = OUT(2, 1) = AVG2(I, X);
+ OUT(0, 1) = OUT(2, 2) = AVG2(J, I);
+ OUT(0, 2) = OUT(2, 3) = AVG2(K, J);
+ OUT(0, 3) = AVG2(L, K);
+
+ OUT(3, 0) = AVG3(A, B, C);
+ OUT(2, 0) = AVG3(X, A, B);
+ OUT(1, 0) = OUT(3, 1) = AVG3(I, X, A);
+ OUT(1, 1) = OUT(3, 2) = AVG3(J, I, X);
+ OUT(1, 2) = OUT(3, 3) = AVG3(K, J, I);
+ OUT(1, 3) = AVG3(L, K, J);
+}
+
+#undef AVG3
+#undef AVG2
+
+//-----------------------------------------------------------------------------
+// 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 inline void Put8x8uv(uint64_t v, uint8_t* dst) {
+ int j;
+ for (j = 0; j < 8; ++j) {
+ *(uint64_t*)(dst + j * BPS) = v;
+ }
+}
+
+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((uint64_t)((dc0 >> 4) * 0x0101010101010101ULL), 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((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), 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((uint64_t)((dc0 >> 3) * 0x0101010101010101ULL), dst);
+}
+
+static void DC8uvNoTopLeft(uint8_t *dst) { // DC with nothing
+ Put8x8uv(0x8080808080808080ULL, dst);
+}
+
+//-----------------------------------------------------------------------------
+// default C implementations
+
+VP8PredFunc VP8PredLuma4[11] = {
+ DC4, TM4, VE4, HE4, RD4, VR4, LD4, VL4, HD4, HU4
+};
+
+VP8PredFunc VP8PredLuma16[7] = {
+ DC16, TM16, VE16, HE16,
+ DC16NoTop, DC16NoLeft, DC16NoTopLeft
+};
+
+VP8PredFunc VP8PredChroma8[7] = {
+ DC8uv, TM8uv, VE8uv, HE8uv,
+ DC8uvNoTop, DC8uvNoLeft, DC8uvNoTopLeft
+};
+
+//-----------------------------------------------------------------------------
+// Edge filtering functions
+
+// 4 pixels in, 2 pixels out
+static 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) + sclip1[1020 + p1 - q1];
+ const int a1 = sclip2[112 + ((a + 4) >> 3)];
+ const int a2 = sclip2[112 + ((a + 3) >> 3)];
+ p[-step] = clip1[255 + p0 + a2];
+ p[ 0] = clip1[255 + q0 - a1];
+}
+
+// 4 pixels in, 4 pixels out
+static 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 = sclip2[112 + ((a + 4) >> 3)];
+ const int a2 = sclip2[112 + ((a + 3) >> 3)];
+ const int a3 = (a1 + 1) >> 1;
+ p[-2*step] = clip1[255 + p1 + a3];
+ p[- step] = clip1[255 + p0 + a2];
+ p[ 0] = clip1[255 + q0 - a1];
+ p[ step] = clip1[255 + q1 - a3];
+}
+
+// 6 pixels in, 6 pixels out
+static 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 = sclip1[1020 + 3 * (q0 - p0) + sclip1[1020 + p1 - q1]];
+ 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] = clip1[255 + p2 + a3];
+ p[-2*step] = clip1[255 + p1 + a2];
+ p[- step] = clip1[255 + p0 + a1];
+ p[ 0] = clip1[255 + q0 - a1];
+ p[ step] = clip1[255 + q1 - a2];
+ p[ 2*step] = clip1[255 + q2 - a3];
+}
+
+static 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 (abs0[255 + p1 - p0] > thresh) || (abs0[255 + q1 - q0] > thresh);
+}
+
+static inline int needs_filter(const uint8_t* p, int step, int thresh) {
+ const int p1 = p[-2*step], p0 = p[-step], q0 = p[0], q1 = p[step];
+ return (2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) <= thresh;
+}
+
+static 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], p0 = p[-step];
+ const int q0 = p[0], q1 = p[step], q2 = p[2*step], q3 = p[3*step];
+ if ((2 * abs0[255 + p0 - q0] + abs1[255 + p1 - q1]) > t)
+ return 0;
+ return abs0[255 + p3 - p2] <= it && abs0[255 + p2 - p1] <= it &&
+ abs0[255 + p1 - p0] <= it && abs0[255 + q3 - q2] <= it &&
+ abs0[255 + q2 - q1] <= it && abs0[255 + q1 - q0] <= it;
+}
+
+//-----------------------------------------------------------------------------
+// Simple In-loop filtering (Paragraph 15.2)
+
+static void SimpleVFilter16(uint8_t* p, int stride, int thresh) {
+ int i;
+ for (i = 0; i < 16; ++i) {
+ if (needs_filter(p + i, stride, thresh)) {
+ do_filter2(p + i, stride);
+ }
+ }
+}
+
+static void SimpleHFilter16(uint8_t* p, int stride, int thresh) {
+ int i;
+ for (i = 0; i < 16; ++i) {
+ if (needs_filter(p + i * stride, 1, thresh)) {
+ 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 inline void FilterLoop26(uint8_t* p, int hstride, int vstride, int size,
+ int thresh, int ithresh, int hev_thresh) {
+ while (size-- > 0) {
+ if (needs_filter2(p, hstride, thresh, ithresh)) {
+ if (hev(p, hstride, hev_thresh)) {
+ do_filter2(p, hstride);
+ } else {
+ do_filter6(p, hstride);
+ }
+ }
+ p += vstride;
+ }
+}
+
+static inline void FilterLoop24(uint8_t* p, int hstride, int vstride, int size,
+ int thresh, int ithresh, int hev_thresh) {
+ while (size-- > 0) {
+ if (needs_filter2(p, hstride, thresh, 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);
+}
+
+//-----------------------------------------------------------------------------
+
+void (*VP8VFilter16)(uint8_t*, int, int, int, int) = VFilter16;
+void (*VP8HFilter16)(uint8_t*, int, int, int, int) = HFilter16;
+void (*VP8VFilter8)(uint8_t*, uint8_t*, int, int, int, int) = VFilter8;
+void (*VP8HFilter8)(uint8_t*, uint8_t*, int, int, int, int) = HFilter8;
+void (*VP8VFilter16i)(uint8_t*, int, int, int, int) = VFilter16i;
+void (*VP8HFilter16i)(uint8_t*, int, int, int, int) = HFilter16i;
+void (*VP8VFilter8i)(uint8_t*, uint8_t*, int, int, int, int) = VFilter8i;
+void (*VP8HFilter8i)(uint8_t*, uint8_t*, int, int, int, int) = HFilter8i;
+
+void (*VP8SimpleVFilter16)(uint8_t*, int, int) = SimpleVFilter16;
+void (*VP8SimpleHFilter16)(uint8_t*, int, int) = SimpleHFilter16;
+void (*VP8SimpleVFilter16i)(uint8_t*, int, int) = SimpleVFilter16i;
+void (*VP8SimpleHFilter16i)(uint8_t*, int, int) = SimpleHFilter16i;
+
+//-----------------------------------------------------------------------------
+
+void VP8DspInit() {
+ // later we'll plug some SSE2 variant here
+}
+
+#if defined(__cplusplus) || defined(c_plusplus)
+} // extern "C"
+#endif