// Copyright 2012 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. // ----------------------------------------------------------------------------- // // Image transforms and color space conversion methods for lossless decoder. // // Authors: Vikas Arora ([email protected]) // Jyrki Alakuijala ([email protected]) #ifndef WEBP_DSP_LOSSLESS_H_ #define WEBP_DSP_LOSSLESS_H_ #include "src/webp/types.h" #include "src/webp/decode.h" #include "src/enc/histogram_enc.h" #include "src/utils/utils.h" #ifdef __cplusplus extern "C" { #endif //------------------------------------------------------------------------------ // Decoding VP8LPredictorFunc; extern VP8LPredictorFunc VP8LPredictors[16]; uint32_t VP8LPredictor0_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor1_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor2_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor3_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor4_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor5_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor6_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor7_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor8_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor9_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor10_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor11_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor12_C(const uint32_t* const left, const uint32_t* const top); uint32_t VP8LPredictor13_C(const uint32_t* const left, const uint32_t* const top); // These Add/Sub function expects upper[-1] and out[-1] to be readable. VP8LPredictorAddSubFunc; extern VP8LPredictorAddSubFunc VP8LPredictorsAdd[16]; extern VP8LPredictorAddSubFunc VP8LPredictorsAdd_C[16]; VP8LProcessDecBlueAndRedFunc; extern VP8LProcessDecBlueAndRedFunc VP8LAddGreenToBlueAndRed; VP8LMultipliers; VP8LTransformColorInverseFunc; extern VP8LTransformColorInverseFunc VP8LTransformColorInverse; struct VP8LTransform; // Defined in dec/vp8li.h. // Performs inverse transform of data given transform information, start and end // rows. Transform will be applied to rows [row_start, row_end[. // The *in and *out pointers refer to source and destination data respectively // corresponding to the intermediate row (row_start). void VP8LInverseTransform(const struct VP8LTransform* const transform, int row_start, int row_end, const uint32_t* const in, uint32_t* const out); // Color space conversion. VP8LConvertFunc; extern VP8LConvertFunc VP8LConvertBGRAToRGB; extern VP8LConvertFunc VP8LConvertBGRAToRGBA; extern VP8LConvertFunc VP8LConvertBGRAToRGBA4444; extern VP8LConvertFunc VP8LConvertBGRAToRGB565; extern VP8LConvertFunc VP8LConvertBGRAToBGR; // Converts from BGRA to other color spaces. void VP8LConvertFromBGRA(const uint32_t* const in_data, int num_pixels, WEBP_CSP_MODE out_colorspace, uint8_t* const rgba); VP8LMapARGBFunc; VP8LMapAlphaFunc; extern VP8LMapARGBFunc VP8LMapColor32b; extern VP8LMapAlphaFunc VP8LMapColor8b; // Similar to the static method ColorIndexInverseTransform() that is part of // lossless.c, but used only for alpha decoding. It takes uint8_t (rather than // uint32_t) arguments for 'src' and 'dst'. void VP8LColorIndexInverseTransformAlpha( const struct VP8LTransform* const transform, int y_start, int y_end, const uint8_t* src, uint8_t* dst); // Expose some C-only fallback functions void VP8LTransformColorInverse_C(const VP8LMultipliers* const m, const uint32_t* src, int num_pixels, uint32_t* dst); void VP8LConvertBGRAToRGB_C(const uint32_t* src, int num_pixels, uint8_t* dst); void VP8LConvertBGRAToRGBA_C(const uint32_t* src, int num_pixels, uint8_t* dst); void VP8LConvertBGRAToRGBA4444_C(const uint32_t* src, int num_pixels, uint8_t* dst); void VP8LConvertBGRAToRGB565_C(const uint32_t* src, int num_pixels, uint8_t* dst); void VP8LConvertBGRAToBGR_C(const uint32_t* src, int num_pixels, uint8_t* dst); void VP8LAddGreenToBlueAndRed_C(const uint32_t* src, int num_pixels, uint32_t* dst); // Must be called before calling any of the above methods. void VP8LDspInit(void); //------------------------------------------------------------------------------ // Encoding VP8LProcessEncBlueAndRedFunc; extern VP8LProcessEncBlueAndRedFunc VP8LSubtractGreenFromBlueAndRed; VP8LTransformColorFunc; extern VP8LTransformColorFunc VP8LTransformColor; VP8LCollectColorBlueTransformsFunc; extern VP8LCollectColorBlueTransformsFunc VP8LCollectColorBlueTransforms; VP8LCollectColorRedTransformsFunc; extern VP8LCollectColorRedTransformsFunc VP8LCollectColorRedTransforms; // Expose some C-only fallback functions void VP8LTransformColor_C(const VP8LMultipliers* const m, uint32_t* data, int num_pixels); void VP8LSubtractGreenFromBlueAndRed_C(uint32_t* argb_data, int num_pixels); void VP8LCollectColorRedTransforms_C(const uint32_t* argb, int stride, int tile_width, int tile_height, int green_to_red, int histo[]); void VP8LCollectColorBlueTransforms_C(const uint32_t* argb, int stride, int tile_width, int tile_height, int green_to_blue, int red_to_blue, int histo[]); extern VP8LPredictorAddSubFunc VP8LPredictorsSub[16]; extern VP8LPredictorAddSubFunc VP8LPredictorsSub_C[16]; // ----------------------------------------------------------------------------- // Huffman-cost related functions. VP8LCostFunc; VP8LCostCombinedFunc; VP8LCombinedShannonEntropyFunc; extern VP8LCostFunc VP8LExtraCost; extern VP8LCostCombinedFunc VP8LExtraCostCombined; extern VP8LCombinedShannonEntropyFunc VP8LCombinedShannonEntropy; VP8LStreaks; VP8LBitEntropy; void VP8LBitEntropyInit(VP8LBitEntropy* const entropy); // Get the combined symbol bit entropy and Huffman cost stats for the // distributions 'X' and 'Y'. Those results can then be refined according to // codec specific heuristics. VP8LGetCombinedEntropyUnrefinedFunc; extern VP8LGetCombinedEntropyUnrefinedFunc VP8LGetCombinedEntropyUnrefined; // Get the entropy for the distribution 'X'. VP8LGetEntropyUnrefinedFunc; extern VP8LGetEntropyUnrefinedFunc VP8LGetEntropyUnrefined; void VP8LBitsEntropyUnrefined(const uint32_t* const array, int n, VP8LBitEntropy* const entropy); VP8LAddVectorFunc; extern VP8LAddVectorFunc VP8LAddVector; VP8LAddVectorEqFunc; extern VP8LAddVectorEqFunc VP8LAddVectorEq; void VP8LHistogramAdd(const VP8LHistogram* const a, const VP8LHistogram* const b, VP8LHistogram* const out); // ----------------------------------------------------------------------------- // PrefixEncode() VP8LVectorMismatchFunc; // Returns the first index where array1 and array2 are different. extern VP8LVectorMismatchFunc VP8LVectorMismatch; VP8LBundleColorMapFunc; extern VP8LBundleColorMapFunc VP8LBundleColorMap; void VP8LBundleColorMap_C(const uint8_t* const row, int width, int xbits, uint32_t* dst); // Must be called before calling any of the above methods. void VP8LEncDspInit(void); //------------------------------------------------------------------------------ #ifdef __cplusplus } // extern "C" #endif #endif // WEBP_DSP_LOSSLESS_H_
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