| // Copyright 2012 Google Inc. All Rights Reserved. |
| // |
| // This code is licensed under the same terms as WebM: |
| // Software License Agreement: http://www.webmproject.org/license/software/ |
| // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
| // ----------------------------------------------------------------------------- |
| // |
| // Color Cache for WebP Lossless |
| // |
| // Author: Jyrki Alakuijala (jyrki@google.com) |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include "./color_cache.h" |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| extern "C" { |
| #endif |
| |
| //------------------------------------------------------------------------------ |
| // VP8LColorCache. |
| |
| int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) { |
| int hash_size; |
| assert(cc != NULL); |
| |
| if (hash_bits == 0) hash_bits = 1; |
| hash_size = 1 << hash_bits; |
| cc->colors_ = (uint32_t*)calloc(hash_size, sizeof(*cc->colors_)); |
| if (cc->colors_ == NULL) return 0; |
| cc->hash_shift_ = 32 - hash_bits; |
| return 1; |
| } |
| |
| void VP8LColorCacheClear(VP8LColorCache* const cc) { |
| if (cc != NULL) { |
| free(cc->colors_); |
| cc->colors_ = NULL; |
| } |
| } |
| |
| #if defined(__cplusplus) || defined(c_plusplus) |
| } |
| #endif |