45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
|
// 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
|