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 (at) 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 22 int 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 33 void VP8LColorCacheClear(VP8LColorCache* const cc) { 34 if (cc != NULL) { 35 WebPSafeFree(cc->colors_); 36 cc->colors_ = NULL; 37 } 38 } 39 40
