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// 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"
#include "../utils/utils.h"
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
//------------------------------------------------------------------------------
// VP8LColorCache.
int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) {
const int hash_size = 1 << hash_bits;
assert(cc != NULL);
assert(hash_bits > 0);
cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)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
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