51 строка
1.9 KiB
C
51 строка
1.9 KiB
C
/*
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* Copyright (c) 2015 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef AV1_ENCODER_PALETTE_H_
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#define AV1_ENCODER_PALETTE_H_
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#include "av1/common/blockd.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Given 'n' 'data' points and 'k' 'centroids' each of dimension 'dim',
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// calculate the centroid 'indices' for the data points.
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void av1_calc_indices(const float *data, const float *centroids,
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uint8_t *indices, int n, int k, int dim);
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// Given 'n' 'data' points and an initial guess of 'k' 'centroids' each of
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// dimension 'dim', runs up to 'max_itr' iterations of k-means algorithm to get
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// updated 'centroids' and the centroid 'indices' for elements in 'data'.
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// Note: the output centroids are rounded off to nearest integers.
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void av1_k_means(const float *data, float *centroids, uint8_t *indices, int n,
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int k, int dim, int max_itr);
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// Given a list of centroids, returns the unique number of centroids 'k', and
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// puts these unique centroids in first 'k' indices of 'centroids' array.
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// Ideally, the centroids should be rounded to integers before calling this
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// method.
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int av1_remove_duplicates(float *centroids, int num_centroids);
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// Returns the number of colors in 'src'.
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int av1_count_colors(const uint8_t *src, int stride, int rows, int cols);
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#if CONFIG_AOM_HIGHBITDEPTH
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// Same as av1_count_colors(), but for high-bitdepth mode.
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int av1_count_colors_highbd(const uint8_t *src8, int stride, int rows, int cols,
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int bit_depth);
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#endif // CONFIG_AOM_HIGHBITDEPTH
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif /* AV1_ENCODER_PALETTE_H_ */
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