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-rw-r--r--drivers/webp/utils/utils.h182
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diff --git a/drivers/webp/utils/utils.h b/drivers/webp/utils/utils.h
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--- a/drivers/webp/utils/utils.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.
-// -----------------------------------------------------------------------------
-//
-// Misc. common utility functions
-//
-// Authors: Skal (pascal.massimino@gmail.com)
-// Urvang (urvang@google.com)
-
-#ifndef WEBP_UTILS_UTILS_H_
-#define WEBP_UTILS_UTILS_H_
-
-#ifdef HAVE_CONFIG_H
-#include "webp/config.h"
-#endif
-
-#include <assert.h>
-
-#include "../dsp/dsp.h"
-#include "webp/types.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-//------------------------------------------------------------------------------
-// Memory allocation
-
-// This is the maximum memory amount that libwebp will ever try to allocate.
-#define WEBP_MAX_ALLOCABLE_MEMORY (1ULL << 40)
-
-// size-checking safe malloc/calloc: verify that the requested size is not too
-// large, or return NULL. You don't need to call these for constructs like
-// malloc(sizeof(foo)), but only if there's picture-dependent size involved
-// somewhere (like: malloc(num_pixels * sizeof(*something))). That's why this
-// safe malloc() borrows the signature from calloc(), pointing at the dangerous
-// underlying multiply involved.
-WEBP_EXTERN(void*) WebPSafeMalloc(uint64_t nmemb, size_t size);
-// Note that WebPSafeCalloc() expects the second argument type to be 'size_t'
-// in order to favor the "calloc(num_foo, sizeof(foo))" pattern.
-WEBP_EXTERN(void*) WebPSafeCalloc(uint64_t nmemb, size_t size);
-
-// Companion deallocation function to the above allocations.
-WEBP_EXTERN(void) WebPSafeFree(void* const ptr);
-
-//------------------------------------------------------------------------------
-// Alignment
-
-#define WEBP_ALIGN_CST 31
-#define WEBP_ALIGN(PTR) (((uintptr_t)(PTR) + WEBP_ALIGN_CST) & ~WEBP_ALIGN_CST)
-
-#if defined(WEBP_FORCE_ALIGNED)
-#include <string.h>
-// memcpy() is the safe way of moving potentially unaligned 32b memory.
-static WEBP_INLINE uint32_t WebPMemToUint32(const uint8_t* const ptr) {
- uint32_t A;
- memcpy(&A, (const int*)ptr, sizeof(A));
- return A;
-}
-static WEBP_INLINE void WebPUint32ToMem(uint8_t* const ptr, uint32_t val) {
- memcpy(ptr, &val, sizeof(val));
-}
-#else
-static WEBP_UBSAN_IGNORE_UNDEF WEBP_INLINE
-uint32_t WebPMemToUint32(const uint8_t* const ptr) {
- return *(const uint32_t*)ptr;
-}
-static WEBP_UBSAN_IGNORE_UNDEF WEBP_INLINE
-void WebPUint32ToMem(uint8_t* const ptr, uint32_t val) {
- *(uint32_t*)ptr = val;
-}
-#endif
-
-//------------------------------------------------------------------------------
-// Reading/writing data.
-
-// Read 16, 24 or 32 bits stored in little-endian order.
-static WEBP_INLINE int GetLE16(const uint8_t* const data) {
- return (int)(data[0] << 0) | (data[1] << 8);
-}
-
-static WEBP_INLINE int GetLE24(const uint8_t* const data) {
- return GetLE16(data) | (data[2] << 16);
-}
-
-static WEBP_INLINE uint32_t GetLE32(const uint8_t* const data) {
- return GetLE16(data) | ((uint32_t)GetLE16(data + 2) << 16);
-}
-
-// Store 16, 24 or 32 bits in little-endian order.
-static WEBP_INLINE void PutLE16(uint8_t* const data, int val) {
- assert(val < (1 << 16));
- data[0] = (val >> 0);
- data[1] = (val >> 8);
-}
-
-static WEBP_INLINE void PutLE24(uint8_t* const data, int val) {
- assert(val < (1 << 24));
- PutLE16(data, val & 0xffff);
- data[2] = (val >> 16);
-}
-
-static WEBP_INLINE void PutLE32(uint8_t* const data, uint32_t val) {
- PutLE16(data, (int)(val & 0xffff));
- PutLE16(data + 2, (int)(val >> 16));
-}
-
-// Returns (int)floor(log2(n)). n must be > 0.
-// use GNU builtins where available.
-#if defined(__GNUC__) && \
- ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
-static WEBP_INLINE int BitsLog2Floor(uint32_t n) {
- return 31 ^ __builtin_clz(n);
-}
-#elif defined(_MSC_VER) && _MSC_VER > 1310 && \
- (defined(_M_X64) || defined(_M_IX86))
-#include <intrin.h>
-#pragma intrinsic(_BitScanReverse)
-
-static WEBP_INLINE int BitsLog2Floor(uint32_t n) {
- unsigned long first_set_bit;
- _BitScanReverse(&first_set_bit, n);
- return first_set_bit;
-}
-#else
-static WEBP_INLINE int BitsLog2Floor(uint32_t n) {
- int log = 0;
- uint32_t value = n;
- int i;
-
- for (i = 4; i >= 0; --i) {
- const int shift = (1 << i);
- const uint32_t x = value >> shift;
- if (x != 0) {
- value = x;
- log += shift;
- }
- }
- return log;
-}
-#endif
-
-//------------------------------------------------------------------------------
-// Pixel copying.
-
-struct WebPPicture;
-
-// Copy width x height pixels from 'src' to 'dst' honoring the strides.
-WEBP_EXTERN(void) WebPCopyPlane(const uint8_t* src, int src_stride,
- uint8_t* dst, int dst_stride,
- int width, int height);
-
-// Copy ARGB pixels from 'src' to 'dst' honoring strides. 'src' and 'dst' are
-// assumed to be already allocated and using ARGB data.
-WEBP_EXTERN(void) WebPCopyPixels(const struct WebPPicture* const src,
- struct WebPPicture* const dst);
-
-//------------------------------------------------------------------------------
-// Unique colors.
-
-// Returns count of unique colors in 'pic', assuming pic->use_argb is true.
-// If the unique color count is more than MAX_COLOR_COUNT, returns
-// MAX_COLOR_COUNT+1.
-// If 'palette' is not NULL and number of unique colors is less than or equal to
-// MAX_COLOR_COUNT, also outputs the actual unique colors into 'palette'.
-// Note: 'palette' is assumed to be an array already allocated with at least
-// MAX_COLOR_COUNT elements.
-WEBP_EXTERN(int) WebPGetColorPalette(const struct WebPPicture* const pic,
- uint32_t* const palette);
-
-//------------------------------------------------------------------------------
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif /* WEBP_UTILS_UTILS_H_ */