/* * 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.
*/
/*!\file * \brief Declares functions used in palette search.
*/ #ifndef AOM_AV1_ENCODER_PALETTE_H_ #define AOM_AV1_ENCODER_PALETTE_H_
void AV1_K_MEANS_RENAME(av1_k_means, 1)(const int16_t *data, int16_t *centroids,
uint8_t *indices, int n, int k, int max_itr); void AV1_K_MEANS_RENAME(av1_k_means, 2)(const int16_t *data, int16_t *centroids,
uint8_t *indices, int n, int k, int max_itr); /*!\endcond */
/*!\brief Calculates the cluster to which each data point belong. * * \ingroup palette_mode_search * \param[in] data The data points whose cluster indices are * to be computed. The data layout is * NUM_DATA_POINTS X DATA_DIM. * \param[in] centroids Pointer to the centroids. The data layout * is NUM_CENTROIDS X DATA_DIM. * \param[in] indices Pointer to store the computed indices. * \param[in] n Number of data points. * \param[in] k Number of clusters. * \param[in] dim Data dimension. * * \remark Returns nothing, but saves each data's cluster index in \a indices.
*/ staticinlinevoid av1_calc_indices(const int16_t *data, const int16_t *centroids, uint8_t *indices, int n, int k, int dim) {
assert(n > 0);
assert(k > 0); if (dim == 1) {
av1_calc_indices_dim1(data, centroids, indices, /*total_dist=*/NULL, n, k);
} elseif (dim == 2) {
av1_calc_indices_dim2(data, centroids, indices, /*total_dist=*/NULL, n, k);
} else {
assert(0 && "Untemplated k means dimension");
}
}
/*!\brief Performs k-means cluster on the data. * * \ingroup palette_mode_search * \param[in] data The data points to be clustered. The data * layout is NUM_DATA_POINTS X DATA_DIM. * \param[in] centroids Pointer to store the computed centroids. * The data layout is * NUM_CENTROIDS X DATA_DIM. * \param[in] indices Pointer to store the computed indices. For * each training data. * \param[in] n Number of data points. * \param[in] k Number of clusters. * \param[in] dim Data dimension. * \param[in] max_itr Maximum number of iterations to run. * * \remark Returns nothing, but saves each cluster's centroid in centroids and * each data's cluster index in \a indices. * * \attention The output centroids are rounded off to nearest integers.
*/ staticinlinevoid av1_k_means(const int16_t *data, int16_t *centroids,
uint8_t *indices, int n, int k, int dim, int max_itr) {
assert(n > 0);
assert(k > 0); if (dim == 1) {
AV1_K_MEANS_RENAME(av1_k_means, 1)(data, centroids, indices, n, k, max_itr);
} elseif (dim == 2) {
AV1_K_MEANS_RENAME(av1_k_means, 2)(data, centroids, indices, n, k, max_itr);
} else {
assert(0 && "Untemplated k means dimension");
}
}
/*!\brief Checks what colors are in the color cache. * * \ingroup palette_mode_search * \param[in] color_cache A cache of colors. * \param[in] n_cache Number of colors in the cache. * \param[in] colors New base colors. * \param[in] n_colors Number of new colors. * \param[in] cache_color_found Stores what cached colors are presented in * colors. * \param[in] out_cache_colors Stores what colors are not in the cache. * * \return Returns the number of colors that are not in cache. In addition, * records whether each cache color is presented in colors in cache_color_found, * and stores and stores the out of cache colors 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);
/*!\brief Gets the rate cost for each delta-encoding v palette. * * \ingroup palette_mode_search * \param[in] pmi Struct that stores the palette mode info. * \param[in] bit_depth Pixel bitdepth of the sequence. * \param[in] zero_count Stores the number of zero deltas. * \param[in] min_bits Minimum bits for the deltas. Sets to * bit_depth - 4. * * \return Returns the number of bits used to transmit each v palette color * delta and assigns 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);
/*!\brief Gets the rate cost for transmitting luma palette color values. * * \ingroup palette_mode_search * \param[in] pmi Struct that stores the palette mode info. * \param[in] color_cache Color cache presented at the decoder. * \param[in] n_cache Number of colors in the cache. * \param[in] bit_depth Pixel bitdepth of the sequence. * * \return Returns the rate needed to transmit the palette. Note that this does * not include the cost of transmitted the color map.
*/ int av1_palette_color_cost_y(const PALETTE_MODE_INFO *const pmi, const uint16_t *color_cache, int n_cache, int bit_depth);
/*!\brief Gets the rate cost for transmitting luma palette chroma values. * * \ingroup palette_mode_search * \param[in] pmi Struct that stores the palette mode info. * \param[in] color_cache Color cache presented at the decoder. * \param[in] n_cache Number of colors in the cache. * \param[in] bit_depth Pixel bitdepth of the sequence. * * \return Returns the rate needed to transmit the palette. Note that this does * not include the cost of transmitted the color map.
*/ int av1_palette_color_cost_uv(const PALETTE_MODE_INFO *const pmi, const uint16_t *color_cache, int n_cache, int bit_depth);
/*!\brief Search for the best palette in the luma plane. * * \ingroup palette_mode_search * \callergraph * This function is used in both inter and intra frame coding.
*/ void av1_rd_pick_palette_intra_sby( conststruct AV1_COMP *cpi, struct macroblock *x, BLOCK_SIZE bsize, int dc_mode_cost, MB_MODE_INFO *best_mbmi, uint8_t *best_palette_color_map,
int64_t *best_rd, int *rate, int *rate_tokenonly, int64_t *distortion,
uint8_t *skippable, int *beat_best_rd, struct PICK_MODE_CONTEXT *ctx,
uint8_t *best_blk_skip, uint8_t *tx_type_map);
/*!\brief Search for the best palette in the chroma plane. * * \ingroup palette_mode_search * \callergraph * This function is used in both inter and intra frame coding.
*/ void av1_rd_pick_palette_intra_sbuv(conststruct AV1_COMP *cpi, struct macroblock *x, int dc_mode_cost,
uint8_t *best_palette_color_map,
MB_MODE_INFO *const best_mbmi,
int64_t *best_rd, int *rate, int *rate_tokenonly, int64_t *distortion,
uint8_t *skippable);
/*!\brief Resets palette color map for chroma channels.
*/ void av1_restore_uv_color_map(conststruct AV1_COMP *cpi, struct macroblock *x);
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