OLD | NEW |
1 // Copyright 2011 Google Inc. | 1 // Copyright 2011 Google Inc. All Rights Reserved. |
2 // | 2 // |
3 // This code is licensed under the same terms as WebM: | 3 // This code is licensed under the same terms as WebM: |
4 // Software License Agreement: http://www.webmproject.org/license/software/ | 4 // Software License Agreement: http://www.webmproject.org/license/software/ |
5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ | 5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
6 // ----------------------------------------------------------------------------- | 6 // ----------------------------------------------------------------------------- |
7 // | 7 // |
8 // Cost tables for level and modes. | 8 // Cost tables for level and modes. |
9 // | 9 // |
10 // Author: Skal (pascal.massimino@gmail.com) | 10 // Author: Skal (pascal.massimino@gmail.com) |
11 | 11 |
12 #ifndef WEBP_ENC_COST_H_ | 12 #ifndef WEBP_ENC_COST_H_ |
13 #define WEBP_ENC_COST_H_ | 13 #define WEBP_ENC_COST_H_ |
14 | 14 |
15 #include "vp8enci.h" | 15 #include "./vp8enci.h" |
16 | 16 |
17 #if defined(__cplusplus) || defined(c_plusplus) | 17 #if defined(__cplusplus) || defined(c_plusplus) |
18 extern "C" { | 18 extern "C" { |
19 #endif | 19 #endif |
20 | 20 |
21 extern const uint16_t VP8LevelFixedCosts[2048]; // approximate cost per level | 21 extern const uint16_t VP8LevelFixedCosts[2048]; // approximate cost per level |
22 extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) | 22 extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p) |
23 | 23 |
24 // Cost of coding one event with probability 'proba'. | 24 // Cost of coding one event with probability 'proba'. |
25 static inline int VP8BitCost(int bit, uint8_t proba) { | 25 static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) { |
26 return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; | 26 return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba]; |
27 } | 27 } |
28 | 28 |
29 // Cost of coding 'nb' 1's and 'total-nb' 0's using 'proba' probability. | 29 // Cost of coding 'nb' 1's and 'total-nb' 0's using 'proba' probability. |
30 static inline uint64_t VP8BranchCost(uint64_t nb, uint64_t total, | 30 static WEBP_INLINE uint64_t VP8BranchCost(uint64_t nb, uint64_t total, |
31 uint8_t proba) { | 31 uint8_t proba) { |
32 return nb * VP8BitCost(1, proba) + (total - nb) * VP8BitCost(0, proba); | 32 return nb * VP8BitCost(1, proba) + (total - nb) * VP8BitCost(0, proba); |
33 } | 33 } |
34 | 34 |
35 // Level cost calculations | 35 // Level cost calculations |
36 extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; | 36 extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2]; |
37 void VP8CalculateLevelCosts(VP8Proba* const proba); | 37 void VP8CalculateLevelCosts(VP8Proba* const proba); |
38 static inline int VP8LevelCost(const uint16_t* const table, int level) { | 38 static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) { |
39 return VP8LevelFixedCosts[level] | 39 return VP8LevelFixedCosts[level] |
40 + table[level > MAX_VARIABLE_LEVEL ? MAX_VARIABLE_LEVEL : level]; | 40 + table[level > MAX_VARIABLE_LEVEL ? MAX_VARIABLE_LEVEL : level]; |
41 } | 41 } |
42 | 42 |
43 // Mode costs | 43 // Mode costs |
44 extern const uint16_t VP8FixedCostsUV[4]; | 44 extern const uint16_t VP8FixedCostsUV[4]; |
45 extern const uint16_t VP8FixedCostsI16[4]; | 45 extern const uint16_t VP8FixedCostsI16[4]; |
46 extern const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES]; | 46 extern const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES]; |
47 | 47 |
48 //------------------------------------------------------------------------------ | 48 //------------------------------------------------------------------------------ |
49 | 49 |
50 #if defined(__cplusplus) || defined(c_plusplus) | 50 #if defined(__cplusplus) || defined(c_plusplus) |
51 } // extern "C" | 51 } // extern "C" |
52 #endif | 52 #endif |
53 | 53 |
54 #endif /* WEBP_ENC_COST_H_ */ | 54 #endif /* WEBP_ENC_COST_H_ */ |
OLD | NEW |