| // 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 (pascal.massimino@gmail.com) |
| |
| #ifndef WEBP_ENC_COST_H_ |
| #define WEBP_ENC_COST_H_ |
| |
| #include "./vp8enci.h" |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| // approximate cost per level: |
| extern const uint16_t VP8LevelFixedCosts[MAX_LEVEL + 1]; |
| extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) |
| |
| // Cost of coding one event with probability 'proba'. |
| static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { |
| return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; |
| } |
| |
| // Level cost calculations |
| extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; |
| void VP8CalculateLevelCosts(VP8Proba* const proba); |
| static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { |
| return VP8LevelFixedCosts[level] |
| + table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : 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]; |
| |
| //------------------------------------------------------------------------------ |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } // extern "C" |
| #endif |
| |
| #endif /* WEBP_ENC_COST_H_ */ |
