diff options
Diffstat (limited to 'src/3rdparty/libwebp/src/enc/cost.h')
-rw-r--r-- | src/3rdparty/libwebp/src/enc/cost.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/3rdparty/libwebp/src/enc/cost.h b/src/3rdparty/libwebp/src/enc/cost.h new file mode 100644 index 0000000..3cbad1a --- /dev/null +++ b/src/3rdparty/libwebp/src/enc/cost.h @@ -0,0 +1,51 @@ +// 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" + +#ifdef __cplusplus +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]; + +//------------------------------------------------------------------------------ + +#ifdef __cplusplus +} // extern "C" +#endif + +#endif /* WEBP_ENC_COST_H_ */ |