1// Copyright 2012 Google Inc. All Rights Reserved. 2// 3// Use of this source code is governed by a BSD-style license 4// that can be found in the COPYING file in the root of the source 5// tree. An additional intellectual property rights grant can be found 6// in the file PATENTS. All contributing project authors may 7// be found in the AUTHORS file in the root of the source tree. 8// ----------------------------------------------------------------------------- 9// 10// Color Cache for WebP Lossless 11// 12// Author: Jyrki Alakuijala (jyrki@google.com) 13 14#include <assert.h> 15#include <stdlib.h> 16#include "./color_cache.h" 17#include "../utils/utils.h" 18 19//------------------------------------------------------------------------------ 20// VP8LColorCache. 21 22int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) { 23 const int hash_size = 1 << hash_bits; 24 assert(cc != NULL); 25 assert(hash_bits > 0); 26 cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size, 27 sizeof(*cc->colors_)); 28 if (cc->colors_ == NULL) return 0; 29 cc->hash_shift_ = 32 - hash_bits; 30 return 1; 31} 32 33void VP8LColorCacheClear(VP8LColorCache* const cc) { 34 if (cc != NULL) { 35 WebPSafeFree(cc->colors_); 36 cc->colors_ = NULL; 37 } 38} 39 40