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Diffstat (limited to 'drivers/webp/utils/utils.h')
-rw-r--r-- | drivers/webp/utils/utils.h | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/drivers/webp/utils/utils.h b/drivers/webp/utils/utils.h deleted file mode 100644 index cef496af78..0000000000 --- a/drivers/webp/utils/utils.h +++ /dev/null @@ -1,182 +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. -// ----------------------------------------------------------------------------- -// -// 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_ */ |