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libwebp/src/enc/cost.h

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cosmetics: normalize copyright headers Change-Id: I5e2462b101e0447a4f15a1455c07131bc97a52dd
2012-01-06 23:49:06 +01:00
// Copyright 2011 Google Inc. All Rights Reserved.
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
//
// 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_
Updated the includes to relative paths. Change-Id: I0ea1a59dd0f6cb1df9f41e048e0c5a13e7fb8335
2011-12-01 11:00:03 +01:00
#include "./vp8enci.h"
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
fix bad saturation order in QuantizeBlock Saturation was done on input coeff, not quantized one. This saturation is not absolutely needed: output of FTransformWHT is in range [-16320, 16321]. At quality 100, max quantization steps is 8, so the maximal range used by QuantizeBlock() is [-2040, 2040]. But there's some extra bias (mtx->bias_[] and mtx->sharpen_[]) so it's better to leave this saturation check for now. addresses issue #145 Change-Id: I4b14f71cdc80c46f9eaadb2a4e8e03d396879d28
2013-03-24 16:47:41 +01:00
// approximate cost per level:
extern const uint16_t VP8LevelFixedCosts[MAX_LEVEL + 1];
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p)
// Cost of coding one event with probability 'proba'.
use WEBP_INLINE for inline function declarations removes a #define inline, objectionable in certain projects Change-Id: Iebe0ce0b25a030756304d402679ef769e5f854d1
2011-11-05 03:44:57 +01:00
static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) {
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba];
}
// Level cost calculations
encoder speed-up: hardcode special level values 1-3% faster Change-Id: Ib2131989fbf819bcbfa6456adbeea0ba27c914f7
2011-07-13 00:52:43 +02:00
extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2];
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
void VP8CalculateLevelCosts(VP8Proba* const proba);
use WEBP_INLINE for inline function declarations removes a #define inline, objectionable in certain projects Change-Id: Iebe0ce0b25a030756304d402679ef769e5f854d1
2011-11-05 03:44:57 +01:00
static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) {
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
return VP8LevelFixedCosts[level]
use 16bit counters for recording proba counts This proved being ok, even for large pictures, provided one takes care of overflow. When an overflow is bound to occur, the counters are renormalized. Overall, shaves ~12k of memory. Change-Id: I2ba21a407964fe1a34c352371cba15166e0c4548
2012-01-24 02:50:58 +01:00
+ table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : level];
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
}
// 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];
cosmetics: fix comment line lengths add additional '-' to //----... style comments globally instead of polluting further commits Change-Id: I951acc68b7b5384b4d6e235349b0067d1aa6fa8b
2011-08-25 23:22:32 +02:00
//------------------------------------------------------------------------------
a WebP encoder converts PNG & JPEG to WebP This is an experimental early version, with lot of room of later optimizations in both speed and quality. Compile with the usual `./configure && make` Command line example is examples/cwebp Usage: cwebp [options] -q quality input.png -o output.webp where 'quality' is between 0 (poor) to 100 (very good). Typical value is around 80. More encoding options with 'cwebp -longhelp' Change-Id: I577a94f6f622a0c44bdfa9daf1086ace89d45539
2011-02-19 08:33:46 +01:00
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"
#endif
harmonize the include guards and #endif comments
2011-09-07 07:31:28 +02:00
#endif /* WEBP_ENC_COST_H_ */
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