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-rw-r--r--thirdparty/libwebp/utils/utils.c330
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diff --git a/thirdparty/libwebp/utils/utils.c b/thirdparty/libwebp/utils/utils.c
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--- a/thirdparty/libwebp/utils/utils.c
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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
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include <stdlib.h>
-#include <string.h> // for memcpy()
-#include "../webp/decode.h"
-#include "../webp/encode.h"
-#include "../webp/format_constants.h" // for MAX_PALETTE_SIZE
-#include "./utils.h"
-
-// If PRINT_MEM_INFO is defined, extra info (like total memory used, number of
-// alloc/free etc) is printed. For debugging/tuning purpose only (it's slow,
-// and not multi-thread safe!).
-// An interesting alternative is valgrind's 'massif' tool:
-// http://valgrind.org/docs/manual/ms-manual.html
-// Here is an example command line:
-/* valgrind --tool=massif --massif-out-file=massif.out \
- --stacks=yes --alloc-fn=WebPSafeMalloc --alloc-fn=WebPSafeCalloc
- ms_print massif.out
-*/
-// In addition:
-// * if PRINT_MEM_TRAFFIC is defined, all the details of the malloc/free cycles
-// are printed.
-// * if MALLOC_FAIL_AT is defined, the global environment variable
-// $MALLOC_FAIL_AT is used to simulate a memory error when calloc or malloc
-// is called for the nth time. Example usage:
-// export MALLOC_FAIL_AT=50 && ./examples/cwebp input.png
-// * if MALLOC_LIMIT is defined, the global environment variable $MALLOC_LIMIT
-// sets the maximum amount of memory (in bytes) made available to libwebp.
-// This can be used to emulate environment with very limited memory.
-// Example: export MALLOC_LIMIT=64000000 && ./examples/dwebp picture.webp
-
-// #define PRINT_MEM_INFO
-// #define PRINT_MEM_TRAFFIC
-// #define MALLOC_FAIL_AT
-// #define MALLOC_LIMIT
-
-//------------------------------------------------------------------------------
-// Checked memory allocation
-
-#if defined(PRINT_MEM_INFO)
-
-#include <stdio.h>
-
-static int num_malloc_calls = 0;
-static int num_calloc_calls = 0;
-static int num_free_calls = 0;
-static int countdown_to_fail = 0; // 0 = off
-
-typedef struct MemBlock MemBlock;
-struct MemBlock {
- void* ptr_;
- size_t size_;
- MemBlock* next_;
-};
-
-static MemBlock* all_blocks = NULL;
-static size_t total_mem = 0;
-static size_t total_mem_allocated = 0;
-static size_t high_water_mark = 0;
-static size_t mem_limit = 0;
-
-static int exit_registered = 0;
-
-static void PrintMemInfo(void) {
- fprintf(stderr, "\nMEMORY INFO:\n");
- fprintf(stderr, "num calls to: malloc = %4d\n", num_malloc_calls);
- fprintf(stderr, " calloc = %4d\n", num_calloc_calls);
- fprintf(stderr, " free = %4d\n", num_free_calls);
- fprintf(stderr, "total_mem: %u\n", (uint32_t)total_mem);
- fprintf(stderr, "total_mem allocated: %u\n", (uint32_t)total_mem_allocated);
- fprintf(stderr, "high-water mark: %u\n", (uint32_t)high_water_mark);
- while (all_blocks != NULL) {
- MemBlock* b = all_blocks;
- all_blocks = b->next_;
- free(b);
- }
-}
-
-static void Increment(int* const v) {
- if (!exit_registered) {
-#if defined(MALLOC_FAIL_AT)
- {
- const char* const malloc_fail_at_str = getenv("MALLOC_FAIL_AT");
- if (malloc_fail_at_str != NULL) {
- countdown_to_fail = atoi(malloc_fail_at_str);
- }
- }
-#endif
-#if defined(MALLOC_LIMIT)
- {
- const char* const malloc_limit_str = getenv("MALLOC_LIMIT");
- if (malloc_limit_str != NULL) {
- mem_limit = atoi(malloc_limit_str);
- }
- }
-#endif
- (void)countdown_to_fail;
- (void)mem_limit;
- atexit(PrintMemInfo);
- exit_registered = 1;
- }
- ++*v;
-}
-
-static void AddMem(void* ptr, size_t size) {
- if (ptr != NULL) {
- MemBlock* const b = (MemBlock*)malloc(sizeof(*b));
- if (b == NULL) abort();
- b->next_ = all_blocks;
- all_blocks = b;
- b->ptr_ = ptr;
- b->size_ = size;
- total_mem += size;
- total_mem_allocated += size;
-#if defined(PRINT_MEM_TRAFFIC)
-#if defined(MALLOC_FAIL_AT)
- fprintf(stderr, "fail-count: %5d [mem=%u]\n",
- num_malloc_calls + num_calloc_calls, (uint32_t)total_mem);
-#else
- fprintf(stderr, "Mem: %u (+%u)\n", (uint32_t)total_mem, (uint32_t)size);
-#endif
-#endif
- if (total_mem > high_water_mark) high_water_mark = total_mem;
- }
-}
-
-static void SubMem(void* ptr) {
- if (ptr != NULL) {
- MemBlock** b = &all_blocks;
- // Inefficient search, but that's just for debugging.
- while (*b != NULL && (*b)->ptr_ != ptr) b = &(*b)->next_;
- if (*b == NULL) {
- fprintf(stderr, "Invalid pointer free! (%p)\n", ptr);
- abort();
- }
- {
- MemBlock* const block = *b;
- *b = block->next_;
- total_mem -= block->size_;
-#if defined(PRINT_MEM_TRAFFIC)
- fprintf(stderr, "Mem: %u (-%u)\n",
- (uint32_t)total_mem, (uint32_t)block->size_);
-#endif
- free(block);
- }
- }
-}
-
-#else
-#define Increment(v) do {} while (0)
-#define AddMem(p, s) do {} while (0)
-#define SubMem(p) do {} while (0)
-#endif
-
-// Returns 0 in case of overflow of nmemb * size.
-static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) {
- const uint64_t total_size = nmemb * size;
- if (nmemb == 0) return 1;
- if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0;
- if (total_size != (size_t)total_size) return 0;
-#if defined(PRINT_MEM_INFO) && defined(MALLOC_FAIL_AT)
- if (countdown_to_fail > 0 && --countdown_to_fail == 0) {
- return 0; // fake fail!
- }
-#endif
-#if defined(MALLOC_LIMIT)
- if (mem_limit > 0) {
- const uint64_t new_total_mem = (uint64_t)total_mem + total_size;
- if (new_total_mem != (size_t)new_total_mem ||
- new_total_mem > mem_limit) {
- return 0; // fake fail!
- }
- }
-#endif
-
- return 1;
-}
-
-void* WebPSafeMalloc(uint64_t nmemb, size_t size) {
- void* ptr;
- Increment(&num_malloc_calls);
- if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL;
- assert(nmemb * size > 0);
- ptr = malloc((size_t)(nmemb * size));
- AddMem(ptr, (size_t)(nmemb * size));
- return ptr;
-}
-
-void* WebPSafeCalloc(uint64_t nmemb, size_t size) {
- void* ptr;
- Increment(&num_calloc_calls);
- if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL;
- assert(nmemb * size > 0);
- ptr = calloc((size_t)nmemb, size);
- AddMem(ptr, (size_t)(nmemb * size));
- return ptr;
-}
-
-void WebPSafeFree(void* const ptr) {
- if (ptr != NULL) {
- Increment(&num_free_calls);
- SubMem(ptr);
- }
- free(ptr);
-}
-
-// Public API function.
-void WebPFree(void* ptr) {
- free(ptr);
-}
-
-//------------------------------------------------------------------------------
-
-void WebPCopyPlane(const uint8_t* src, int src_stride,
- uint8_t* dst, int dst_stride, int width, int height) {
- assert(src != NULL && dst != NULL);
- assert(src_stride >= width && dst_stride >= width);
- while (height-- > 0) {
- memcpy(dst, src, width);
- src += src_stride;
- dst += dst_stride;
- }
-}
-
-void WebPCopyPixels(const WebPPicture* const src, WebPPicture* const dst) {
- assert(src != NULL && dst != NULL);
- assert(src->width == dst->width && src->height == dst->height);
- assert(src->use_argb && dst->use_argb);
- WebPCopyPlane((uint8_t*)src->argb, 4 * src->argb_stride, (uint8_t*)dst->argb,
- 4 * dst->argb_stride, 4 * src->width, src->height);
-}
-
-//------------------------------------------------------------------------------
-
-#define COLOR_HASH_SIZE (MAX_PALETTE_SIZE * 4)
-#define COLOR_HASH_RIGHT_SHIFT 22 // 32 - log2(COLOR_HASH_SIZE).
-
-int WebPGetColorPalette(const WebPPicture* const pic, uint32_t* const palette) {
- int i;
- int x, y;
- int num_colors = 0;
- uint8_t in_use[COLOR_HASH_SIZE] = { 0 };
- uint32_t colors[COLOR_HASH_SIZE];
- static const uint64_t kHashMul = 0x1e35a7bdull;
- const uint32_t* argb = pic->argb;
- const int width = pic->width;
- const int height = pic->height;
- uint32_t last_pix = ~argb[0]; // so we're sure that last_pix != argb[0]
- assert(pic != NULL);
- assert(pic->use_argb);
-
- for (y = 0; y < height; ++y) {
- for (x = 0; x < width; ++x) {
- int key;
- if (argb[x] == last_pix) {
- continue;
- }
- last_pix = argb[x];
- key = ((last_pix * kHashMul) & 0xffffffffu) >> COLOR_HASH_RIGHT_SHIFT;
- while (1) {
- if (!in_use[key]) {
- colors[key] = last_pix;
- in_use[key] = 1;
- ++num_colors;
- if (num_colors > MAX_PALETTE_SIZE) {
- return MAX_PALETTE_SIZE + 1; // Exact count not needed.
- }
- break;
- } else if (colors[key] == last_pix) {
- break; // The color is already there.
- } else {
- // Some other color sits here, so do linear conflict resolution.
- ++key;
- key &= (COLOR_HASH_SIZE - 1); // Key mask.
- }
- }
- }
- argb += pic->argb_stride;
- }
-
- if (palette != NULL) { // Fill the colors into palette.
- num_colors = 0;
- for (i = 0; i < COLOR_HASH_SIZE; ++i) {
- if (in_use[i]) {
- palette[num_colors] = colors[i];
- ++num_colors;
- }
- }
- }
- return num_colors;
-}
-
-#undef COLOR_HASH_SIZE
-#undef COLOR_HASH_RIGHT_SHIFT
-
-//------------------------------------------------------------------------------
-
-#if defined(WEBP_NEED_LOG_TABLE_8BIT)
-const uint8_t WebPLogTable8bit[256] = { // 31 ^ clz(i)
- 0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
- 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
-};
-#endif
-
-//------------------------------------------------------------------------------
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