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-rw-r--r--drivers/webp/dsp/lossless.h372
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diff --git a/drivers/webp/dsp/lossless.h b/drivers/webp/dsp/lossless.h
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index 7709b4fe85..0000000000
--- a/drivers/webp/dsp/lossless.h
+++ /dev/null
@@ -1,372 +0,0 @@
-// 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 "webp/types.h"
-#include "webp/decode.h"
-
-#include "../enc/histogram.h"
-#include "../utils/utils.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifdef WEBP_EXPERIMENTAL_FEATURES
-#include "../enc/delta_palettization.h"
-#endif // WEBP_EXPERIMENTAL_FEATURES
-
-//------------------------------------------------------------------------------
-// Decoding
-
-typedef uint32_t (*VP8LPredictorFunc)(uint32_t left, const uint32_t* const top);
-extern VP8LPredictorFunc VP8LPredictors[16];
-
-typedef void (*VP8LProcessBlueAndRedFunc)(uint32_t* argb_data, int num_pixels);
-extern VP8LProcessBlueAndRedFunc 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 (*VP8LTransformColorFunc)(const VP8LMultipliers* const m,
- uint32_t* argb_data, int num_pixels);
-extern VP8LTransformColorFunc 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);
-
-// color mapping related functions.
-static WEBP_INLINE uint32_t VP8GetARGBIndex(uint32_t idx) {
- return (idx >> 8) & 0xff;
-}
-
-static WEBP_INLINE uint8_t VP8GetAlphaIndex(uint8_t idx) {
- return idx;
-}
-
-static WEBP_INLINE uint32_t VP8GetARGBValue(uint32_t val) {
- return val;
-}
-
-static WEBP_INLINE uint8_t VP8GetAlphaValue(uint32_t val) {
- return (val >> 8) & 0xff;
-}
-
-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,
- uint32_t* data, int num_pixels);
-
-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(uint32_t* data, int num_pixels);
-
-// Must be called before calling any of the above methods.
-void VP8LDspInit(void);
-
-//------------------------------------------------------------------------------
-// Encoding
-
-extern VP8LProcessBlueAndRedFunc VP8LSubtractGreenFromBlueAndRed;
-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[]);
-
-//------------------------------------------------------------------------------
-// Image transforms.
-
-void VP8LResidualImage(int width, int height, int bits, int low_effort,
- uint32_t* const argb, uint32_t* const argb_scratch,
- uint32_t* const image, int near_lossless, int exact,
- int used_subtract_green);
-
-void VP8LColorSpaceTransform(int width, int height, int bits, int quality,
- uint32_t* const argb, uint32_t* image);
-
-//------------------------------------------------------------------------------
-// Misc methods.
-
-// Computes sampled size of 'size' when sampling using 'sampling bits'.
-static WEBP_INLINE uint32_t VP8LSubSampleSize(uint32_t size,
- uint32_t sampling_bits) {
- return (size + (1 << sampling_bits) - 1) >> sampling_bits;
-}
-
-// Converts near lossless quality into max number of bits shaved off.
-static WEBP_INLINE int VP8LNearLosslessBits(int near_lossless_quality) {
- // 100 -> 0
- // 80..99 -> 1
- // 60..79 -> 2
- // 40..59 -> 3
- // 20..39 -> 4
- // 0..19 -> 5
- return 5 - near_lossless_quality / 20;
-}
-
-// -----------------------------------------------------------------------------
-// Faster logarithm for integers. Small values use a look-up table.
-
-// The threshold till approximate version of log_2 can be used.
-// Practically, we can get rid of the call to log() as the two values match to
-// very high degree (the ratio of these two is 0.99999x).
-// Keeping a high threshold for now.
-#define APPROX_LOG_WITH_CORRECTION_MAX 65536
-#define APPROX_LOG_MAX 4096
-#define LOG_2_RECIPROCAL 1.44269504088896338700465094007086
-#define LOG_LOOKUP_IDX_MAX 256
-extern const float kLog2Table[LOG_LOOKUP_IDX_MAX];
-extern const float kSLog2Table[LOG_LOOKUP_IDX_MAX];
-typedef float (*VP8LFastLog2SlowFunc)(uint32_t v);
-
-extern VP8LFastLog2SlowFunc VP8LFastLog2Slow;
-extern VP8LFastLog2SlowFunc VP8LFastSLog2Slow;
-
-static WEBP_INLINE float VP8LFastLog2(uint32_t v) {
- return (v < LOG_LOOKUP_IDX_MAX) ? kLog2Table[v] : VP8LFastLog2Slow(v);
-}
-// Fast calculation of v * log2(v) for integer input.
-static WEBP_INLINE float VP8LFastSLog2(uint32_t v) {
- return (v < LOG_LOOKUP_IDX_MAX) ? kSLog2Table[v] : VP8LFastSLog2Slow(v);
-}
-
-// -----------------------------------------------------------------------------
-// Huffman-cost related functions.
-
-typedef double (*VP8LCostFunc)(const uint32_t* population, int length);
-typedef double (*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 steak, 1=non-zero streak
- int streaks[2][2]; // [zero/non-zero][streak<3 / streak>=3]
-} VP8LStreaks;
-
-typedef VP8LStreaks (*VP8LCostCombinedCountFunc)(const uint32_t* X,
- const uint32_t* Y, int length);
-
-extern VP8LCostCombinedCountFunc VP8LHuffmanCostCombinedCount;
-
-typedef struct { // small struct to hold bit entropy results
- double 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.
-void VP8LGetCombinedEntropyUnrefined(const uint32_t* const X,
- const uint32_t* const Y, int length,
- VP8LBitEntropy* const bit_entropy,
- VP8LStreaks* const stats);
-// Get the entropy for the distribution 'X'.
-void VP8LGetEntropyUnrefined(const uint32_t* const X, int length,
- VP8LBitEntropy* const bit_entropy,
- VP8LStreaks* const stats);
-
-void VP8LBitsEntropyUnrefined(const uint32_t* const array, int n,
- VP8LBitEntropy* const entropy);
-
-typedef void (*GetEntropyUnrefinedHelperFunc)(uint32_t val, int i,
- uint32_t* const val_prev,
- int* const i_prev,
- VP8LBitEntropy* const bit_entropy,
- VP8LStreaks* const stats);
-// Internal function used by VP8LGet*EntropyUnrefined.
-extern GetEntropyUnrefinedHelperFunc VP8LGetEntropyUnrefinedHelper;
-
-typedef void (*VP8LHistogramAddFunc)(const VP8LHistogram* const a,
- const VP8LHistogram* const b,
- VP8LHistogram* const out);
-extern VP8LHistogramAddFunc VP8LHistogramAdd;
-
-// -----------------------------------------------------------------------------
-// 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;
-
-static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) {
- const int log_floor = BitsLog2Floor(n);
- if (n == (n & ~(n - 1))) // zero or a power of two.
- return log_floor;
- else
- return log_floor + 1;
-}
-
-// Splitting of distance and length codes into prefixes and
-// extra bits. The prefixes are encoded with an entropy code
-// while the extra bits are stored just as normal bits.
-static WEBP_INLINE void VP8LPrefixEncodeBitsNoLUT(int distance, int* const code,
- int* const extra_bits) {
- const int highest_bit = BitsLog2Floor(--distance);
- const int second_highest_bit = (distance >> (highest_bit - 1)) & 1;
- *extra_bits = highest_bit - 1;
- *code = 2 * highest_bit + second_highest_bit;
-}
-
-static WEBP_INLINE void VP8LPrefixEncodeNoLUT(int distance, int* const code,
- int* const extra_bits,
- int* const extra_bits_value) {
- const int highest_bit = BitsLog2Floor(--distance);
- const int second_highest_bit = (distance >> (highest_bit - 1)) & 1;
- *extra_bits = highest_bit - 1;
- *extra_bits_value = distance & ((1 << *extra_bits) - 1);
- *code = 2 * highest_bit + second_highest_bit;
-}
-
-#define PREFIX_LOOKUP_IDX_MAX 512
-typedef struct {
- int8_t code_;
- int8_t extra_bits_;
-} VP8LPrefixCode;
-
-// These tables are derived using VP8LPrefixEncodeNoLUT.
-extern const VP8LPrefixCode kPrefixEncodeCode[PREFIX_LOOKUP_IDX_MAX];
-extern const uint8_t kPrefixEncodeExtraBitsValue[PREFIX_LOOKUP_IDX_MAX];
-static WEBP_INLINE void VP8LPrefixEncodeBits(int distance, int* const code,
- int* const extra_bits) {
- if (distance < PREFIX_LOOKUP_IDX_MAX) {
- const VP8LPrefixCode prefix_code = kPrefixEncodeCode[distance];
- *code = prefix_code.code_;
- *extra_bits = prefix_code.extra_bits_;
- } else {
- VP8LPrefixEncodeBitsNoLUT(distance, code, extra_bits);
- }
-}
-
-static WEBP_INLINE void VP8LPrefixEncode(int distance, int* const code,
- int* const extra_bits,
- int* const extra_bits_value) {
- if (distance < PREFIX_LOOKUP_IDX_MAX) {
- const VP8LPrefixCode prefix_code = kPrefixEncodeCode[distance];
- *code = prefix_code.code_;
- *extra_bits = prefix_code.extra_bits_;
- *extra_bits_value = kPrefixEncodeExtraBitsValue[distance];
- } else {
- VP8LPrefixEncodeNoLUT(distance, code, extra_bits, extra_bits_value);
- }
-}
-
-// Sum of each component, mod 256.
-static WEBP_INLINE uint32_t VP8LAddPixels(uint32_t a, uint32_t b) {
- const uint32_t alpha_and_green = (a & 0xff00ff00u) + (b & 0xff00ff00u);
- const uint32_t red_and_blue = (a & 0x00ff00ffu) + (b & 0x00ff00ffu);
- return (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu);
-}
-
-// Difference of each component, mod 256.
-static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) {
- const uint32_t alpha_and_green =
- 0x00ff00ffu + (a & 0xff00ff00u) - (b & 0xff00ff00u);
- const uint32_t red_and_blue =
- 0xff00ff00u + (a & 0x00ff00ffu) - (b & 0x00ff00ffu);
- return (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu);
-}
-
-void VP8LBundleColorMap(const uint8_t* const row, int width,
- int xbits, uint32_t* const 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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