// Copyright 2012 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.

// -----------------------------------------------------------------------------

//

// Image transforms and color space conversion methods for lossless decoder.

//

// Authors: Vikas Arora (vikaas.arora@gmail.com)

// Jyrki Alakuijala (jyrki@google.com)

// Urvang Joshi (urvang@google.com)

#include "src/dsp/dsp.h"

#include <assert.h>

#include <math.h>

#include <stdlib.h>

#include "src/dec/vp8li_dec.h"

#include "src/utils/endian_inl_utils.h"

#include "src/dsp/lossless.h"

#include "src/dsp/lossless_common.h"

#define MAX_DIFF_COST (1e30f)

//------------------------------------------------------------------------------

// Image transforms.

static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) {

return (((a0 ^ a1) & 0xfefefefeu) >> 1) + (a0 & a1);

}

static WEBP_INLINE uint32_t Average3(uint32_t a0, uint32_t a1, uint32_t a2) {

return Average2(Average2(a0, a2), a1);

}

static WEBP_INLINE uint32_t Average4(uint32_t a0, uint32_t a1,

uint32_t a2, uint32_t a3) {

return Average2(Average2(a0, a1), Average2(a2, a3));

}

static WEBP_INLINE uint32_t Clip255(uint32_t a) {

if (a < 256) {

return a;

}

// return 0, when a is a negative integer.

// return 255, when a is positive.

return ~a >> 24;

}

static WEBP_INLINE int AddSubtractComponentFull(int a, int b, int c) {

return Clip255(a + b - c);

}

static WEBP_INLINE uint32_t ClampedAddSubtractFull(uint32_t c0, uint32_t c1,

uint32_t c2) {

const int a = AddSubtractComponentFull(c0 >> 24, c1 >> 24, c2 >> 24);

const int r = AddSubtractComponentFull((c0 >> 16) & 0xff,

(c1 >> 16) & 0xff,

(c2 >> 16) & 0xff);

const int g = AddSubtractComponentFull((c0 >> 8) & 0xff,

(c1 >> 8) & 0xff,

(c2 >> 8) & 0xff);

const int b = AddSubtractComponentFull(c0 & 0xff, c1 & 0xff, c2 & 0xff);

return ((uint32_t)a << 24) | (r << 16) | (g << 8) | b;

}

static WEBP_INLINE int AddSubtractComponentHalf(int a, int b) {

return Clip255(a + (a - b) / 2);

}

static WEBP_INLINE uint32_t ClampedAddSubtractHalf(uint32_t c0, uint32_t c1,

uint32_t c2) {

const uint32_t ave = Average2(c0, c1);

const int a = AddSubtractComponentHalf(ave >> 24, c2 >> 24);

const int r = AddSubtractComponentHalf((ave >> 16) & 0xff, (c2 >> 16) & 0xff);

const int g = AddSubtractComponentHalf((ave >> 8) & 0xff, (c2 >> 8) & 0xff);

const int b = AddSubtractComponentHalf((ave >> 0) & 0xff, (c2 >> 0) & 0xff);

return ((uint32_t)a << 24) | (r << 16) | (g << 8) | b;

}

// gcc <= 4.9 on ARM generates incorrect code in Select() when Sub3() is

// inlined.

#if defined(__arm__) && LOCAL_GCC_VERSION <= 0x409

# define LOCAL_INLINE __attribute__ ((noinline))

#else

# define LOCAL_INLINE WEBP_INLINE

#endif

static LOCAL_INLINE int Sub3(int a, int b, int c) {

const int pb = b - c;

const int pa = a - c;

return abs(pb) - abs(pa);

}

#undef LOCAL_INLINE

static WEBP_INLINE uint32_t Select(uint32_t a, uint32_t b, uint32_t c) {

const int pa_minus_pb =

Sub3((a >> 24) , (b >> 24) , (c >> 24) ) +

Sub3((a >> 16) & 0xff, (b >> 16) & 0xff, (c >> 16) & 0xff) +

Sub3((a >> 8) & 0xff, (b >> 8) & 0xff, (c >> 8) & 0xff) +

Sub3((a ) & 0xff, (b ) & 0xff, (c ) & 0xff);

return (pa_minus_pb <= 0) ? a : b;

}

//------------------------------------------------------------------------------

// Predictors

static uint32_t Predictor0_C(uint32_t left, const uint32_t* const top) {

(void)top;

(void)left;

return ARGB_BLACK;

}

static uint32_t Predictor1_C(uint32_t left, const uint32_t* const top) {

(void)top;

return left;

}

static uint32_t Predictor2_C(uint32_t left, const uint32_t* const top) {

(void)left;

return top[0];

}

static uint32_t Predictor3_C(uint32_t left, const uint32_t* const top) {

(void)left;

return top[1];

}

static uint32_t Predictor4_C(uint32_t left, const uint32_t* const top) {

(void)left;

return top[-1];

}

static uint32_t Predictor5_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Average3(left, top[0], top[1]);

return pred;

}

static uint32_t Predictor6_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Average2(left, top[-1]);

return pred;

}

static uint32_t Predictor7_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Average2(left, top[0]);

return pred;

}

static uint32_t Predictor8_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Average2(top[-1], top[0]);

(void)left;

return pred;

}

static uint32_t Predictor9_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Average2(top[0], top[1]);

(void)left;

return pred;

}

static uint32_t Predictor10_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Average4(left, top[-1], top[0], top[1]);

return pred;

}

static uint32_t Predictor11_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = Select(top[0], left, top[-1]);

return pred;

}

static uint32_t Predictor12_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = ClampedAddSubtractFull(left, top[0], top[-1]);

return pred;

}

static uint32_t Predictor13_C(uint32_t left, const uint32_t* const top) {

const uint32_t pred = ClampedAddSubtractHalf(left, top[0], top[-1]);

return pred;

}

GENERATE_PREDICTOR_ADD(Predictor0_C, PredictorAdd0_C)

static void PredictorAdd1_C(const uint32_t* in, const uint32_t* upper,

int num_pixels, uint32_t* out) {

int i;

uint32_t left = out[-1];

for (i = 0; i < num_pixels; ++i) {

out[i] = left = VP8LAddPixels(in[i], left);

}

(void)upper;

}

GENERATE_PREDICTOR_ADD(Predictor2_C, PredictorAdd2_C)

GENERATE_PREDICTOR_ADD(Predictor3_C, PredictorAdd3_C)

GENERATE_PREDICTOR_ADD(Predictor4_C, PredictorAdd4_C)

GENERATE_PREDICTOR_ADD(Predictor5_C, PredictorAdd5_C)

GENERATE_PREDICTOR_ADD(Predictor6_C, PredictorAdd6_C)

GENERATE_PREDICTOR_ADD(Predictor7_C, PredictorAdd7_C)

GENERATE_PREDICTOR_ADD(Predictor8_C, PredictorAdd8_C)

GENERATE_PREDICTOR_ADD(Predictor9_C, PredictorAdd9_C)

GENERATE_PREDICTOR_ADD(Predictor10_C, PredictorAdd10_C)

GENERATE_PREDICTOR_ADD(Predictor11_C, PredictorAdd11_C)

GENERATE_PREDICTOR_ADD(Predictor12_C, PredictorAdd12_C)

GENERATE_PREDICTOR_ADD(Predictor13_C, PredictorAdd13_C)

//------------------------------------------------------------------------------

// Inverse prediction.

static void PredictorInverseTransform_C(const VP8LTransform* const transform,

int y_start, int y_end,

const uint32_t* in, uint32_t* out) {

const int width = transform->xsize_;

if (y_start == 0) { // First Row follows the L (mode=1) mode.

PredictorAdd0_C(in, NULL, 1, out);

PredictorAdd1_C(in + 1, NULL, width - 1, out + 1);

in += width;

out += width;

++y_start;

}

{

int y = y_start;

const int tile_width = 1 << transform->bits_;

const int mask = tile_width - 1;

const int tiles_per_row = VP8LSubSampleSize(width, transform->bits_);

const uint32_t* pred_mode_base =

transform->data_ + (y >> transform->bits_) * tiles_per_row;

while (y < y_end) {

const uint32_t* pred_mode_src = pred_mode_base;

int x = 1;

// First pixel follows the T (mode=2) mode.

PredictorAdd2_C(in, out - width, 1, out);

// .. the rest:

while (x < width) {

const VP8LPredictorAddSubFunc pred_func =

VP8LPredictorsAdd[((*pred_mode_src++) >> 8) & 0xf];

int x_end = (x & ~mask) + tile_width;

if (x_end > width) x_end = width;

pred_func(in + x, out + x - width, x_end - x, out + x);

x = x_end;

}

in += width;

out += width;

++y;

if ((y & mask) == 0) { // Use the same mask, since tiles are squares.

pred_mode_base += tiles_per_row;

}

}

}

}

// Add green to blue and red channels (i.e. perform the inverse transform of

// 'subtract green').

void VP8LAddGreenToBlueAndRed_C(const uint32_t* src, int num_pixels,

uint32_t* dst) {

int i;

for (i = 0; i < num_pixels; ++i) {

const uint32_t argb = src[i];

const uint32_t green = ((argb >> 8) & 0xff);

uint32_t red_blue = (argb & 0x00ff00ffu);

red_blue += (green << 16) | green;

red_blue &= 0x00ff00ffu;

dst[i] = (argb & 0xff00ff00u) | red_blue;

}

}

static WEBP_INLINE int ColorTransformDelta(int8_t color_pred,

int8_t color) {

return ((int)color_pred * color) >> 5;

}

static WEBP_INLINE void ColorCodeToMultipliers(uint32_t color_code,

VP8LMultipliers* const m) {

m->green_to_red_ = (color_code >> 0) & 0xff;

m->green_to_blue_ = (color_code >> 8) & 0xff;

m->red_to_blue_ = (color_code >> 16) & 0xff;

}

void VP8LTransformColorInverse_C(const VP8LMultipliers* const m,

const uint32_t* src, int num_pixels,

uint32_t* dst) {

int i;

for (i = 0; i < num_pixels; ++i) {

const uint32_t argb = src[i];

const uint32_t green = argb >> 8;

const uint32_t red = argb >> 16;

int new_red = red & 0xff;

int new_blue = argb & 0xff;

new_red += ColorTransformDelta(m->green_to_red_, green);

new_red &= 0xff;

new_blue += ColorTransformDelta(m->green_to_blue_, green);

new_blue += ColorTransformDelta(m->red_to_blue_, new_red);

new_blue &= 0xff;

dst[i] = (argb & 0xff00ff00u) | (new_red << 16) | (new_blue);

}

}

// Color space inverse transform.

static void ColorSpaceInverseTransform_C(const VP8LTransform* const transform,

int y_start, int y_end,

const uint32_t* src, uint32_t* dst) {

const int width = transform->xsize_;

const int tile_width = 1 << transform->bits_;

const int mask = tile_width - 1;

const int safe_width = width & ~mask;

const int remaining_width = width - safe_width;

const int tiles_per_row = VP8LSubSampleSize(width, transform->bits_);

int y = y_start;

const uint32_t* pred_row =

transform->data_ + (y >> transform->bits_) * tiles_per_row;

while (y < y_end) {

const uint32_t* pred = pred_row;

VP8LMultipliers m = { 0, 0, 0 };

const uint32_t* const src_safe_end = src + safe_width;

const uint32_t* const src_end = src + width;

while (src < src_safe_end) {

ColorCodeToMultipliers(*pred++, &m);

VP8LTransformColorInverse(&m, src, tile_width, dst);

src += tile_width;

dst += tile_width;

}

if (src < src_end) { // Left-overs using C-version.

ColorCodeToMultipliers(*pred++, &m);

VP8LTransformColorInverse(&m, src, remaining_width, dst);

src += remaining_width;

dst += remaining_width;

}

++y;

if ((y & mask) == 0) pred_row += tiles_per_row;

}

}

// Separate out pixels packed together using pixel-bundling.

// We define two methods for ARGB data (uint32_t) and alpha-only data (uint8_t).

#define COLOR_INDEX_INVERSE(FUNC_NAME, F_NAME, STATIC_DECL, TYPE, BIT_SUFFIX, \

GET_INDEX, GET_VALUE) \

static void F_NAME(const TYPE* src, const uint32_t* const color_map, \

TYPE* dst, int y_start, int y_end, int width) { \

int y; \

for (y = y_start; y < y_end; ++y) { \

int x; \

for (x = 0; x < width; ++x) { \

*dst++ = GET_VALUE(color_map[GET_INDEX(*src++)]); \

} \

} \

} \

STATIC_DECL void FUNC_NAME(const VP8LTransform* const transform, \

int y_start, int y_end, const TYPE* src, \

TYPE* dst) { \

int y; \

const int bits_per_pixel = 8 >> transform->bits_; \

const int width = transform->xsize_; \

const uint32_t* const color_map = transform->data_; \

if (bits_per_pixel < 8) { \

const int pixels_per_byte = 1 << transform->bits_; \

const int count_mask = pixels_per_byte - 1; \

const uint32_t bit_mask = (1 << bits_per_pixel) - 1; \

for (y = y_start; y < y_end; ++y) { \

uint32_t packed_pixels = 0; \

int x; \

for (x = 0; x < width; ++x) { \

/* We need to load fresh 'packed_pixels' once every */ \

/* 'pixels_per_byte' increments of x. Fortunately, pixels_per_byte */ \

/* is a power of 2, so can just use a mask for that, instead of */ \

/* decrementing a counter. */ \

if ((x & count_mask) == 0) packed_pixels = GET_INDEX(*src++); \

*dst++ = GET_VALUE(color_map[packed_pixels & bit_mask]); \

packed_pixels >>= bits_per_pixel; \

} \

} \

} else { \

VP8LMapColor##BIT_SUFFIX(src, color_map, dst, y_start, y_end, width); \

} \

}

COLOR_INDEX_INVERSE(ColorIndexInverseTransform_C, MapARGB_C, static,

uint32_t, 32b, VP8GetARGBIndex, VP8GetARGBValue)

COLOR_INDEX_INVERSE(VP8LColorIndexInverseTransformAlpha, MapAlpha_C, ,

uint8_t, 8b, VP8GetAlphaIndex, VP8GetAlphaValue)

#undef COLOR_INDEX_INVERSE

void VP8LInverseTransform(const VP8LTransform* const transform,

int row_start, int row_end,

const uint32_t* const in, uint32_t* const out) {

const int width = transform->xsize_;

assert(row_start < row_end);

assert(row_end <= transform->ysize_);

switch (transform->type_) {

case SUBTRACT_GREEN:

VP8LAddGreenToBlueAndRed(in, (row_end - row_start) * width, out);

break;

case PREDICTOR_TRANSFORM:

PredictorInverseTransform_C(transform, row_start, row_end, in, out);

if (row_end != transform->ysize_) {

// The last predicted row in this iteration will be the top-pred row

// for the first row in next iteration.

memcpy(out - width, out + (row_end - row_start - 1) * width,

width * sizeof(*out));

}

break;

case CROSS_COLOR_TRANSFORM:

ColorSpaceInverseTransform_C(transform, row_start, row_end, in, out);

break;

case COLOR_INDEXING_TRANSFORM:

if (in == out && transform->bits_ > 0) {

// Move packed pixels to the end of unpacked region, so that unpacking

// can occur seamlessly.

// Also, note that this is the only transform that applies on

// the effective width of VP8LSubSampleSize(xsize_, bits_). All other

// transforms work on effective width of xsize_.

const int out_stride = (row_end - row_start) * width;

const int in_stride = (row_end - row_start) *

VP8LSubSampleSize(transform->xsize_, transform->bits_);

uint32_t* const src = out + out_stride - in_stride;

memmove(src, out, in_stride * sizeof(*src));

ColorIndexInverseTransform_C(transform, row_start, row_end, src, out);

} else {

ColorIndexInverseTransform_C(transform, row_start, row_end, in, out);

}

break;

}

}

//------------------------------------------------------------------------------

// Color space conversion.

static int is_big_endian(void) {

static const union {

uint16_t w;

uint8_t b[2];

} tmp = { 1 };

return (tmp.b[0] != 1);

}

void VP8LConvertBGRAToRGB_C(const uint32_t* src,

int num_pixels, uint8_t* dst) {

const uint32_t* const src_end = src + num_pixels;

while (src < src_end) {

const uint32_t argb = *src++;

*dst++ = (argb >> 16) & 0xff;

*dst++ = (argb >> 8) & 0xff;

*dst++ = (argb >> 0) & 0xff;

}

}

void VP8LConvertBGRAToRGBA_C(const uint32_t* src,

int num_pixels, uint8_t* dst) {

const uint32_t* const src_end = src + num_pixels;

while (src < src_end) {

const uint32_t argb = *src++;

*dst++ = (argb >> 16) & 0xff;

*dst++ = (argb >> 8) & 0xff;

*dst++ = (argb >> 0) & 0xff;

*dst++ = (argb >> 24) & 0xff;

}

}

void VP8LConvertBGRAToRGBA4444_C(const uint32_t* src,

int num_pixels, uint8_t* dst) {

const uint32_t* const src_end = src + num_pixels;

while (src < src_end) {

const uint32_t argb = *src++;

const uint8_t rg = ((argb >> 16) & 0xf0) | ((argb >> 12) & 0xf);

const uint8_t ba = ((argb >> 0) & 0xf0) | ((argb >> 28) & 0xf);

#if (WEBP_SWAP_16BIT_CSP == 1)

*dst++ = ba;

*dst++ = rg;

#else

*dst++ = rg;

*dst++ = ba;

#endif

}

}

void VP8LConvertBGRAToRGB565_C(const uint32_t* src,

int num_pixels, uint8_t* dst) {

const uint32_t* const src_end = src + num_pixels;

while (src < src_end) {

const uint32_t argb = *src++;

const uint8_t rg = ((argb >> 16) & 0xf8) | ((argb >> 13) & 0x7);

const uint8_t gb = ((argb >> 5) & 0xe0) | ((argb >> 3) & 0x1f);

#if (WEBP_SWAP_16BIT_CSP == 1)

*dst++ = gb;

*dst++ = rg;

#else

*dst++ = rg;

*dst++ = gb;

#endif

}

}

void VP8LConvertBGRAToBGR_C(const uint32_t* src,

int num_pixels, uint8_t* dst) {

const uint32_t* const src_end = src + num_pixels;

while (src < src_end) {

const uint32_t argb = *src++;

*dst++ = (argb >> 0) & 0xff;

*dst++ = (argb >> 8) & 0xff;

*dst++ = (argb >> 16) & 0xff;

}

}

static void CopyOrSwap(const uint32_t* src, int num_pixels, uint8_t* dst,

int swap_on_big_endian) {

if (is_big_endian() == swap_on_big_endian) {

const uint32_t* const src_end = src + num_pixels;

while (src < src_end) {

const uint32_t argb = *src++;

WebPUint32ToMem(dst, BSwap32(argb));

dst += sizeof(argb);

}

} else {

memcpy(dst, src, num_pixels * sizeof(*src));

}

}

void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels,

WEBP_CSP_MODE out_colorspace, uint8_t* const rgba) {

switch (out_colorspace) {

case MODE_RGB:

VP8LConvertBGRAToRGB(in_data, num_pixels, rgba);

break;

case MODE_RGBA:

VP8LConvertBGRAToRGBA(in_data, num_pixels, rgba);

break;

case MODE_rgbA:

VP8LConvertBGRAToRGBA(in_data, num_pixels, rgba);

WebPApplyAlphaMultiply(rgba, 0, num_pixels, 1, 0);

break;

case MODE_BGR:

VP8LConvertBGRAToBGR(in_data, num_pixels, rgba);

break;

case MODE_BGRA:

CopyOrSwap(in_data, num_pixels, rgba, 1);

break;

case MODE_bgrA:

CopyOrSwap(in_data, num_pixels, rgba, 1);

WebPApplyAlphaMultiply(rgba, 0, num_pixels, 1, 0);

break;

case MODE_ARGB:

CopyOrSwap(in_data, num_pixels, rgba, 0);

break;

case MODE_Argb:

CopyOrSwap(in_data, num_pixels, rgba, 0);

WebPApplyAlphaMultiply(rgba, 1, num_pixels, 1, 0);

break;

case MODE_RGBA_4444:

VP8LConvertBGRAToRGBA4444(in_data, num_pixels, rgba);

break;

case MODE_rgbA_4444:

VP8LConvertBGRAToRGBA4444(in_data, num_pixels, rgba);

WebPApplyAlphaMultiply4444(rgba, num_pixels, 1, 0);

break;

case MODE_RGB_565:

VP8LConvertBGRAToRGB565(in_data, num_pixels, rgba);

break;

default:

assert(0); // Code flow should not reach here.

}

}

//------------------------------------------------------------------------------

VP8LProcessDecBlueAndRedFunc VP8LAddGreenToBlueAndRed;

VP8LPredictorAddSubFunc VP8LPredictorsAdd[16];

VP8LPredictorFunc VP8LPredictors[16];

// exposed plain-C implementations

VP8LPredictorAddSubFunc VP8LPredictorsAdd_C[16];

VP8LPredictorFunc VP8LPredictors_C[16];

VP8LTransformColorInverseFunc VP8LTransformColorInverse;

VP8LConvertFunc VP8LConvertBGRAToRGB;

VP8LConvertFunc VP8LConvertBGRAToRGBA;

VP8LConvertFunc VP8LConvertBGRAToRGBA4444;

VP8LConvertFunc VP8LConvertBGRAToRGB565;

VP8LConvertFunc VP8LConvertBGRAToBGR;

VP8LMapARGBFunc VP8LMapColor32b;

VP8LMapAlphaFunc VP8LMapColor8b;

extern void VP8LDspInitSSE2(void);

extern void VP8LDspInitNEON(void);

extern void VP8LDspInitMIPSdspR2(void);

extern void VP8LDspInitMSA(void);

#define COPY_PREDICTOR_ARRAY(IN, OUT) do { \

(OUT)[0] = IN##0_C; \

(OUT)[1] = IN##1_C; \

(OUT)[2] = IN##2_C; \

(OUT)[3] = IN##3_C; \

(OUT)[4] = IN##4_C; \

(OUT)[5] = IN##5_C; \

(OUT)[6] = IN##6_C; \

(OUT)[7] = IN##7_C; \

(OUT)[8] = IN##8_C; \

(OUT)[9] = IN##9_C; \

(OUT)[10] = IN##10_C; \

(OUT)[11] = IN##11_C; \

(OUT)[12] = IN##12_C; \

(OUT)[13] = IN##13_C; \

(OUT)[14] = IN##0_C; /* <- padding security sentinels*/ \

(OUT)[15] = IN##0_C; \

} while (0);

WEBP_DSP_INIT_FUNC(VP8LDspInit) {

COPY_PREDICTOR_ARRAY(Predictor, VP8LPredictors)

COPY_PREDICTOR_ARRAY(Predictor, VP8LPredictors_C)

COPY_PREDICTOR_ARRAY(PredictorAdd, VP8LPredictorsAdd)

COPY_PREDICTOR_ARRAY(PredictorAdd, VP8LPredictorsAdd_C)

#if !WEBP_NEON_OMIT_C_CODE

VP8LAddGreenToBlueAndRed = VP8LAddGreenToBlueAndRed_C;

VP8LTransformColorInverse = VP8LTransformColorInverse_C;

VP8LConvertBGRAToRGBA = VP8LConvertBGRAToRGBA_C;

VP8LConvertBGRAToRGB = VP8LConvertBGRAToRGB_C;

VP8LConvertBGRAToBGR = VP8LConvertBGRAToBGR_C;

#endif

VP8LConvertBGRAToRGBA4444 = VP8LConvertBGRAToRGBA4444_C;

VP8LConvertBGRAToRGB565 = VP8LConvertBGRAToRGB565_C;

VP8LMapColor32b = MapARGB_C;

VP8LMapColor8b = MapAlpha_C;

// If defined, use CPUInfo() to overwrite some pointers with faster versions.

if (VP8GetCPUInfo != NULL) {

#if defined(WEBP_USE_SSE2)

if (VP8GetCPUInfo(kSSE2)) {

VP8LDspInitSSE2();

}

#endif

#if defined(WEBP_USE_MIPS_DSP_R2)

if (VP8GetCPUInfo(kMIPSdspR2)) {

VP8LDspInitMIPSdspR2();

}

#endif

#if defined(WEBP_USE_MSA)

if (VP8GetCPUInfo(kMSA)) {

VP8LDspInitMSA();

}

#endif

}

#if defined(WEBP_USE_NEON)

if (WEBP_NEON_OMIT_C_CODE ||

(VP8GetCPUInfo != NULL && VP8GetCPUInfo(kNEON))) {

VP8LDspInitNEON();

}

#endif

assert(VP8LAddGreenToBlueAndRed != NULL);

assert(VP8LTransformColorInverse != NULL);

assert(VP8LConvertBGRAToRGBA != NULL);

assert(VP8LConvertBGRAToRGB != NULL);

assert(VP8LConvertBGRAToBGR != NULL);

assert(VP8LConvertBGRAToRGBA4444 != NULL);

assert(VP8LConvertBGRAToRGB565 != NULL);

assert(VP8LMapColor32b != NULL);

assert(VP8LMapColor8b != NULL);

}

#undef COPY_PREDICTOR_ARRAY

//------------------------------------------------------------------------------