godot/thirdparty/libwebp/src/enc/cost_enc.h

// 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.
// -----------------------------------------------------------------------------
//
// Cost tables for level and modes.
//
// Author: Skal ([email protected])

#ifndef WEBP_ENC_COST_ENC_H_
#define WEBP_ENC_COST_ENC_H_

#include <assert.h>
#include <stdlib.h>
#include "src/enc/vp8i_enc.h"

#ifdef __cplusplus
extern "C" {
#endif

// On-the-fly info about the current set of residuals. Handy to avoid
// passing zillions of params.
VP8Residual;
struct VP8Residual { … };

void VP8InitResidual(int first, int coeff_type,
                     VP8Encoder* const enc, VP8Residual* const res);

int VP8RecordCoeffs(int ctx, const VP8Residual* const res);

// Record proba context used.
static WEBP_INLINE int VP8RecordStats(int bit, proba_t* const stats) { … }

// Cost of coding one event with probability 'proba'.
static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { … }

// Level cost calculations
extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2];
void VP8CalculateLevelCosts(VP8EncProba* const proba);
static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { … }

// Mode costs
extern const uint16_t VP8FixedCostsUV[4];
extern const uint16_t VP8FixedCostsI16[4];
extern const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES];

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

#ifdef __cplusplus
}    // extern "C"
#endif

#endif  // WEBP_ENC_COST_ENC_H_