enc_sse41.c | Explore in Territory

// 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 version of some encoding functions.
//
// Author: Skal ([email protected])

#include "src/dsp/dsp.h"

#if defined(WEBP_USE_SSE41)
#include <smmintrin.h>
#include <stdlib.h>  // for abs()

#include "src/dsp/common_sse2.h"
#include "src/enc/vp8i_enc.h"

//------------------------------------------------------------------------------
// Compute susceptibility based on DCT-coeff histograms.

static void CollectHistogram_SSE41(const uint8_t* ref, const uint8_t* pred,
                                   int start_block, int end_block,
                                   VP8Histogram* const histo) { … }

//------------------------------------------------------------------------------
// Texture distortion
//
// We try to match the spectral content (weighted) between source and
// reconstructed samples.

// Hadamard transform
// Returns the weighted sum of the absolute value of transformed coefficients.
// w[] contains a row-major 4 by 4 symmetric matrix.
static int TTransform_SSE41(const uint8_t* inA, const uint8_t* inB,
                            const uint16_t* const w) { … }

static int Disto4x4_SSE41(const uint8_t* const a, const uint8_t* const b,
                          const uint16_t* const w) { … }

static int Disto16x16_SSE41(const uint8_t* const a, const uint8_t* const b,
                            const uint16_t* const w) { … }

//------------------------------------------------------------------------------
// Quantization
//

// Generates a pshufb constant for shuffling 16b words.
#define PSHUFB_CST …

static WEBP_INLINE int DoQuantizeBlock_SSE41(int16_t in[16], int16_t out[16],
                                             const uint16_t* const sharpen,
                                             const VP8Matrix* const mtx) { … }

#undef PSHUFB_CST

static int QuantizeBlock_SSE41(int16_t in[16], int16_t out[16],
                               const VP8Matrix* const mtx) { … }

static int QuantizeBlockWHT_SSE41(int16_t in[16], int16_t out[16],
                                  const VP8Matrix* const mtx) { … }

static int Quantize2Blocks_SSE41(int16_t in[32], int16_t out[32],
                                 const VP8Matrix* const mtx) { … }

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

extern void VP8EncDspInitSSE41(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8EncDspInitSSE41(void) { … }

#else  // !WEBP_USE_SSE41

WEBP_DSP_INIT_STUB(VP8EncDspInitSSE41)

#endif  // WEBP_USE_SSE41
chromium/third_party/libwebp/src/src/dsp/enc_sse41.c
