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diff --git a/media/libwebp/src/dsp/lossless.h b/media/libwebp/src/dsp/lossless.h
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+// 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 (vikaas.arora@gmail.com)
+// Jyrki Alakuijala (jyrki@google.com)
+
+#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
+
+typedef uint32_t (*VP8LPredictorFunc)(const uint32_t* const left,
+ const uint32_t* const top);
+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.
+typedef void (*VP8LPredictorAddSubFunc)(const uint32_t* in,
+ const uint32_t* upper, int num_pixels,
+ uint32_t* out);
+extern VP8LPredictorAddSubFunc VP8LPredictorsAdd[16];
+extern VP8LPredictorAddSubFunc VP8LPredictorsAdd_C[16];
+
+typedef void (*VP8LProcessDecBlueAndRedFunc)(const uint32_t* src,
+ int num_pixels, uint32_t* dst);
+extern VP8LProcessDecBlueAndRedFunc VP8LAddGreenToBlueAndRed;
+
+typedef struct {
+ // Note: the members are uint8_t, so that any negative values are
+ // automatically converted to "mod 256" values.
+ uint8_t green_to_red_;
+ uint8_t green_to_blue_;
+ uint8_t red_to_blue_;
+} VP8LMultipliers;
+typedef void (*VP8LTransformColorInverseFunc)(const VP8LMultipliers* const m,
+ const uint32_t* src,
+ int num_pixels, uint32_t* dst);
+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.
+typedef void (*VP8LConvertFunc)(const uint32_t* src, int num_pixels,
+ uint8_t* dst);
+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);
+
+typedef void (*VP8LMapARGBFunc)(const uint32_t* src,
+ const uint32_t* const color_map,
+ uint32_t* dst, int y_start,
+ int y_end, int width);
+typedef void (*VP8LMapAlphaFunc)(const uint8_t* src,
+ const uint32_t* const color_map,
+ uint8_t* dst, int y_start,
+ int y_end, int width);
+
+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
+
+typedef void (*VP8LProcessEncBlueAndRedFunc)(uint32_t* dst, int num_pixels);
+extern VP8LProcessEncBlueAndRedFunc VP8LSubtractGreenFromBlueAndRed;
+typedef void (*VP8LTransformColorFunc)(const VP8LMultipliers* const m,
+ uint32_t* dst, int num_pixels);
+extern VP8LTransformColorFunc VP8LTransformColor;
+typedef void (*VP8LCollectColorBlueTransformsFunc)(
+ const uint32_t* argb, int stride,
+ int tile_width, int tile_height,
+ int green_to_blue, int red_to_blue, int histo[]);
+extern VP8LCollectColorBlueTransformsFunc VP8LCollectColorBlueTransforms;
+
+typedef void (*VP8LCollectColorRedTransformsFunc)(
+ const uint32_t* argb, int stride,
+ int tile_width, int tile_height,
+ int green_to_red, int histo[]);
+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.
+
+typedef float (*VP8LCostFunc)(const uint32_t* population, int length);
+typedef float (*VP8LCostCombinedFunc)(const uint32_t* X, const uint32_t* Y,
+ int length);
+typedef float (*VP8LCombinedShannonEntropyFunc)(const int X[256],
+ const int Y[256]);
+
+extern VP8LCostFunc VP8LExtraCost;
+extern VP8LCostCombinedFunc VP8LExtraCostCombined;
+extern VP8LCombinedShannonEntropyFunc VP8LCombinedShannonEntropy;
+
+typedef struct { // small struct to hold counters
+ int counts[2]; // index: 0=zero streak, 1=non-zero streak
+ int streaks[2][2]; // [zero/non-zero][streak<3 / streak>=3]
+} VP8LStreaks;
+
+typedef struct { // small struct to hold bit entropy results
+ float entropy; // entropy
+ uint32_t sum; // sum of the population
+ int nonzeros; // number of non-zero elements in the population
+ uint32_t max_val; // maximum value in the population
+ uint32_t nonzero_code; // index of the last non-zero in the population
+} 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.
+typedef void (*VP8LGetCombinedEntropyUnrefinedFunc)(
+ const uint32_t X[], const uint32_t Y[], int length,
+ VP8LBitEntropy* const bit_entropy, VP8LStreaks* const stats);
+extern VP8LGetCombinedEntropyUnrefinedFunc VP8LGetCombinedEntropyUnrefined;
+
+// Get the entropy for the distribution 'X'.
+typedef void (*VP8LGetEntropyUnrefinedFunc)(const uint32_t X[], int length,
+ VP8LBitEntropy* const bit_entropy,
+ VP8LStreaks* const stats);
+extern VP8LGetEntropyUnrefinedFunc VP8LGetEntropyUnrefined;
+
+void VP8LBitsEntropyUnrefined(const uint32_t* const array, int n,
+ VP8LBitEntropy* const entropy);
+
+typedef void (*VP8LAddVectorFunc)(const uint32_t* a, const uint32_t* b,
+ uint32_t* out, int size);
+extern VP8LAddVectorFunc VP8LAddVector;
+typedef void (*VP8LAddVectorEqFunc)(const uint32_t* a, uint32_t* out, int size);
+extern VP8LAddVectorEqFunc VP8LAddVectorEq;
+void VP8LHistogramAdd(const VP8LHistogram* const a,
+ const VP8LHistogram* const b,
+ VP8LHistogram* const out);
+
+// -----------------------------------------------------------------------------
+// PrefixEncode()
+
+typedef int (*VP8LVectorMismatchFunc)(const uint32_t* const array1,
+ const uint32_t* const array2, int length);
+// Returns the first index where array1 and array2 are different.
+extern VP8LVectorMismatchFunc VP8LVectorMismatch;
+
+typedef void (*VP8LBundleColorMapFunc)(const uint8_t* const row, int width,
+ int xbits, uint32_t* dst);
+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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