chromium/third_party/libwebp/src/src/dsp/lossless_enc_sse41.c

// Copyright 2015 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.
// -----------------------------------------------------------------------------
//
// SSE4.1 variant of methods for lossless encoder
//
// Author: Skal ([email protected])

#include "src/dsp/dsp.h"

#if defined(WEBP_USE_SSE41)
#include <assert.h>
#include <smmintrin.h>
#include "src/dsp/lossless.h"

//------------------------------------------------------------------------------
// Cost operations.

static WEBP_INLINE uint32_t HorizontalSum_SSE41(__m128i cost) { … }

static uint32_t ExtraCost_SSE41(const uint32_t* const a, int length) { … }

static uint32_t ExtraCostCombined_SSE41(const uint32_t* const a,
                                        const uint32_t* const b, int length) { … }

//------------------------------------------------------------------------------
// Subtract-Green Transform

static void SubtractGreenFromBlueAndRed_SSE41(uint32_t* argb_data,
                                              int num_pixels) { … }

//------------------------------------------------------------------------------
// Color Transform

// For sign-extended multiplying constants, pre-shifted by 5:
#define CST_5b(X) …

#define MK_CST_16 …

static void CollectColorBlueTransforms_SSE41(const uint32_t* argb, int stride,
                                             int tile_width, int tile_height,
                                             int green_to_blue, int red_to_blue,
                                             int histo[]) { … }

static void CollectColorRedTransforms_SSE41(const uint32_t* argb, int stride,
                                            int tile_width, int tile_height,
                                            int green_to_red, int histo[]) { … }

#undef MK_CST_16

//------------------------------------------------------------------------------
// Entry point

extern void VP8LEncDspInitSSE41(void);

WEBP_TSAN_IGNORE_FUNCTION void VP8LEncDspInitSSE41(void) { … }

#else  // !WEBP_USE_SSE41

WEBP_DSP_INIT_STUB(VP8LEncDspInitSSE41)

#endif  // WEBP_USE_SSE41