/* * 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_ #include "av1/common/blockd.h" #ifdef __cplusplus extern "C" { #endif struct AV1_COMP; struct PICK_MODE_CONTEXT; struct macroblock; /*!\cond */ #define AV1_K_MEANS_RENAME(func, dim) … 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. */ static inline void av1_calc_indices(const int16_t *data, const int16_t *centroids, uint8_t *indices, int n, int k, int dim) { … } /*!\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. */ static inline void av1_k_means(const int16_t *data, int16_t *centroids, uint8_t *indices, int n, int k, int dim, int max_itr) { … } /*!\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( const struct 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(const struct 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(const struct AV1_COMP *cpi, struct macroblock *x); #ifdef __cplusplus } // extern "C" #endif #endif // AOM_AV1_ENCODER_PALETTE_H_
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