1 // Copyright 2012 Google Inc. All Rights Reserved. 2 // 3 // This code is licensed under the same terms as WebM: 4 // Software License Agreement: http://www.webmproject.org/license/software/ 5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ 6 // ----------------------------------------------------------------------------- 7 // 8 // Color Cache for WebP Lossless 9 // 10 // Author: Jyrki Alakuijala (jyrki (at) google.com) 11 12 #include <assert.h> 13 #include <stdlib.h> 14 #include "./color_cache.h" 15 #include "../utils/utils.h" 16 17 #if defined(__cplusplus) || defined(c_plusplus) 18 extern "C" { 19 #endif 20 21 //------------------------------------------------------------------------------ 22 // VP8LColorCache. 23 24 int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) { 25 const int hash_size = 1 << hash_bits; 26 assert(cc != NULL); 27 assert(hash_bits > 0); 28 cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size, 29 sizeof(*cc->colors_)); 30 if (cc->colors_ == NULL) return 0; 31 cc->hash_shift_ = 32 - hash_bits; 32 return 1; 33 } 34 35 void VP8LColorCacheClear(VP8LColorCache* const cc) { 36 if (cc != NULL) { 37 free(cc->colors_); 38 cc->colors_ = NULL; 39 } 40 } 41 42 #if defined(__cplusplus) || defined(c_plusplus) 43 } 44 #endif 45
