15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright 2011 Google Inc. All Rights Reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 3eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// Use of this source code is governed by a BSD-style license 4eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// that can be found in the COPYING file in the root of the source 5eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// tree. An additional intellectual property rights grant can be found 6eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// in the file PATENTS. All contributing project authors may 7eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// be found in the AUTHORS file in the root of the source tree. 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ----------------------------------------------------------------------------- 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Cost tables for level and modes. 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Author: Skal (pascal.massimino@gmail.com) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef WEBP_ENC_COST_H_ 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define WEBP_ENC_COST_H_ 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "./vp8enci.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__cplusplus) || defined(c_plusplus) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern "C" { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 23c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)// approximate cost per level: 24c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)extern const uint16_t VP8LevelFixedCosts[MAX_LEVEL + 1]; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Cost of coding one event with probability 'proba'. 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Level cost calculations 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void VP8CalculateLevelCosts(VP8Proba* const proba); 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return VP8LevelFixedCosts[level] 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) + table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : level]; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Mode costs 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern const uint16_t VP8FixedCostsUV[4]; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern const uint16_t VP8FixedCostsI16[4]; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES]; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__cplusplus) || defined(c_plusplus) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // extern "C" 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif /* WEBP_ENC_COST_H_ */ 52