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Diffstat (limited to 'drivers/webpold/enc/cost.h')
| -rw-r--r-- | drivers/webpold/enc/cost.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/webpold/enc/cost.h b/drivers/webpold/enc/cost.h new file mode 100644 index 0000000000..09b75b699d --- /dev/null +++ b/drivers/webpold/enc/cost.h @@ -0,0 +1,48 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// This code is licensed under the same terms as WebM: +// Software License Agreement: http://www.webmproject.org/license/software/ +// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// ----------------------------------------------------------------------------- +// +// 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 + +extern const uint16_t VP8LevelFixedCosts[2048]; // approximate cost per level +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_ */ |