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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AV1_ENCODER_PALETTE_H_
+#define AOM_AV1_ENCODER_PALETTE_H_
+
+#include "av1/common/blockd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define AV1_K_MEANS_RENAME(func, dim) func##_dim##dim
+
+void AV1_K_MEANS_RENAME(av1_calc_indices, 1)(const int *data,
+ const int *centroids,
+ uint8_t *indices, int n, int k);
+void AV1_K_MEANS_RENAME(av1_calc_indices, 2)(const int *data,
+ const int *centroids,
+ uint8_t *indices, int n, int k);
+void AV1_K_MEANS_RENAME(av1_k_means, 1)(const int *data, int *centroids,
+ uint8_t *indices, int n, int k,
+ int max_itr);
+void AV1_K_MEANS_RENAME(av1_k_means, 2)(const int *data, int *centroids,
+ uint8_t *indices, int n, int k,
+ int max_itr);
+
+// Given 'n' 'data' points and 'k' 'centroids' each of dimension 'dim',
+// calculate the centroid 'indices' for the data points.
+static INLINE void av1_calc_indices(const int *data, const int *centroids,
+ uint8_t *indices, int n, int k, int dim) {
+ if (dim == 1) {
+ AV1_K_MEANS_RENAME(av1_calc_indices, 1)(data, centroids, indices, n, k);
+ } else if (dim == 2) {
+ AV1_K_MEANS_RENAME(av1_calc_indices, 2)(data, centroids, indices, n, k);
+ } else {
+ assert(0 && "Untemplated k means dimension");
+ }
+}
+
+// Given 'n' 'data' points and an initial guess of 'k' 'centroids' each of
+// dimension 'dim', runs up to 'max_itr' iterations of k-means algorithm to get
+// updated 'centroids' and the centroid 'indices' for elements in 'data'.
+// Note: the output centroids are rounded off to nearest integers.
+static INLINE void av1_k_means(const int *data, int *centroids,
+ uint8_t *indices, int n, int k, int dim,
+ int max_itr) {
+ if (dim == 1) {
+ AV1_K_MEANS_RENAME(av1_k_means, 1)(data, centroids, indices, n, k, max_itr);
+ } else if (dim == 2) {
+ AV1_K_MEANS_RENAME(av1_k_means, 2)(data, centroids, indices, n, k, max_itr);
+ } else {
+ assert(0 && "Untemplated k means dimension");
+ }
+}
+
+// Given a list of centroids, returns the unique number of centroids 'k', and
+// puts these unique centroids in first 'k' indices of 'centroids' array.
+// Ideally, the centroids should be rounded to integers before calling this
+// method.
+int av1_remove_duplicates(int *centroids, int num_centroids);
+
+// Given a color cache and a set of base colors, find if each cache color is
+// present in the base colors, record the binary results in "cache_color_found".
+// Record the colors that are not in the color cache in "out_cache_colors".
+int av1_index_color_cache(const uint16_t *color_cache, int n_cache,
+ const uint16_t *colors, int n_colors,
+ uint8_t *cache_color_found, int *out_cache_colors);
+
+// Return the number of bits used to transmit each v palette color delta;
+// assign zero_count with the number of deltas being 0.
+int av1_get_palette_delta_bits_v(const PALETTE_MODE_INFO *const pmi,
+ int bit_depth, int *zero_count, int *min_bits);
+
+// Return the rate cost for transmitting luma palette color values.
+int av1_palette_color_cost_y(const PALETTE_MODE_INFO *const pmi,
+ uint16_t *color_cache, int n_cache, int bit_depth);
+
+// Return the rate cost for transmitting chroma palette color values.
+int av1_palette_color_cost_uv(const PALETTE_MODE_INFO *const pmi,
+ uint16_t *color_cache, int n_cache,
+ int bit_depth);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // AOM_AV1_ENCODER_PALETTE_H_