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45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
// Copyright 2012 Google Inc. All Rights Reserved.
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//
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// This code is licensed under the same terms as WebM:
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// Software License Agreement: http://www.webmproject.org/license/software/
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// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
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// -----------------------------------------------------------------------------
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//
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// Color Cache for WebP Lossless
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//
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// Author: Jyrki Alakuijala (jyrki@google.com)
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#include <assert.h>
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#include <stdlib.h>
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#include "./color_cache.h"
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#include "../utils/utils.h"
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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//------------------------------------------------------------------------------
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// VP8LColorCache.
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int VP8LColorCacheInit(VP8LColorCache* const cc, int hash_bits) {
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const int hash_size = 1 << hash_bits;
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assert(cc != NULL);
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assert(hash_bits > 0);
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cc->colors_ = (uint32_t*)WebPSafeCalloc((uint64_t)hash_size,
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sizeof(*cc->colors_));
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if (cc->colors_ == NULL) return 0;
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cc->hash_shift_ = 32 - hash_bits;
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return 1;
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}
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void VP8LColorCacheClear(VP8LColorCache* const cc) {
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if (cc != NULL) {
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free(cc->colors_);
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cc->colors_ = NULL;
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}
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}
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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