godot/thirdparty/libwebp/src/dsp/filters.c

// Copyright 2011 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.
// -----------------------------------------------------------------------------
//
// Spatial prediction using various filters
//
// Author: Urvang ([email protected])

#include "src/dsp/dsp.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>

//------------------------------------------------------------------------------
// Helpful macro.

#define DCHECK …

#if !WEBP_NEON_OMIT_C_CODE
static WEBP_INLINE void PredictLine_C(const uint8_t* src, const uint8_t* pred,
                                      uint8_t* dst, int length, int inverse) { … }

//------------------------------------------------------------------------------
// Horizontal filter.

static WEBP_INLINE void DoHorizontalFilter_C(const uint8_t* in,
                                             int width, int height, int stride,
                                             int row, int num_rows,
                                             int inverse, uint8_t* out) { … }

//------------------------------------------------------------------------------
// Vertical filter.

static WEBP_INLINE void DoVerticalFilter_C(const uint8_t* in,
                                           int width, int height, int stride,
                                           int row, int num_rows,
                                           int inverse, uint8_t* out) { … }
#endif  // !WEBP_NEON_OMIT_C_CODE

//------------------------------------------------------------------------------
// Gradient filter.

static WEBP_INLINE int GradientPredictor_C(uint8_t a, uint8_t b, uint8_t c) { … }

#if !WEBP_NEON_OMIT_C_CODE
static WEBP_INLINE void DoGradientFilter_C(const uint8_t* in,
                                           int width, int height, int stride,
                                           int row, int num_rows,
                                           int inverse, uint8_t* out) { … }
#endif  // !WEBP_NEON_OMIT_C_CODE

#undef DCHECK

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

#if !WEBP_NEON_OMIT_C_CODE
static void HorizontalFilter_C(const uint8_t* data, int width, int height,
                               int stride, uint8_t* filtered_data) { … }

static void VerticalFilter_C(const uint8_t* data, int width, int height,
                             int stride, uint8_t* filtered_data) { … }

static void GradientFilter_C(const uint8_t* data, int width, int height,
                             int stride, uint8_t* filtered_data) { … }
#endif  // !WEBP_NEON_OMIT_C_CODE

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

static void NoneUnfilter_C(const uint8_t* prev, const uint8_t* in,
                           uint8_t* out, int width) { … }

static void HorizontalUnfilter_C(const uint8_t* prev, const uint8_t* in,
                                 uint8_t* out, int width) { … }

#if !WEBP_NEON_OMIT_C_CODE
static void VerticalUnfilter_C(const uint8_t* prev, const uint8_t* in,
                               uint8_t* out, int width) { … }
#endif  // !WEBP_NEON_OMIT_C_CODE

static void GradientUnfilter_C(const uint8_t* prev, const uint8_t* in,
                               uint8_t* out, int width) { … }

//------------------------------------------------------------------------------
// Init function

WebPFilterFunc WebPFilters[WEBP_FILTER_LAST];
WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST];

extern VP8CPUInfo VP8GetCPUInfo;
extern void VP8FiltersInitMIPSdspR2(void);
extern void VP8FiltersInitMSA(void);
extern void VP8FiltersInitNEON(void);
extern void VP8FiltersInitSSE2(void);

WEBP_DSP_INIT_FUNC(VP8FiltersInit) { … }