/* * Copyright (c) 2020, 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 high level functions to search through intra modes. */ #ifndef AOM_AV1_ENCODER_INTRA_MODE_SEARCH_H_ #define AOM_AV1_ENCODER_INTRA_MODE_SEARCH_H_ #include "av1/encoder/encoder.h" #ifdef __cplusplus extern "C" { #endif /*! \brief Variables related to intra-mode search during inter frame coding. * * \ingroup intra_mode_search * This is a set of variables used during intra-mode search for inter frames. * This includes an histogram of gradient speed features and a cache of uv * prediction to avoid repeated search of chroma prediction. */ IntraModeSearchState; /*!\brief Evaluate a given luma intra-mode for inter frames. * * \ingroup intra_mode_search * \callgraph * \callergraph * This function handles an intra-mode luma prediction when the current frame * is an inter frame. This is the intra-mode counterpart of handle_inter_mode. * This function performs an intra luma prediction using the mode specified by * x->e_mbd.mi[0]->mode. This function does *not* support palette mode * prediction in the luma channel. * * \param[in,out] intra_search_state Structure to intra search state. * \param[in] cpi Top-level encoder structure. * \param[in,out] x Pointer to structure holding all the * data for the current macroblock. * \param[in] bsize Current partition block size. * \param[in] ref_frame_cost The entropy cost for signaling that the * current ref frame is an intra frame. * \param[in] ctx Structure to hold the number of 4x4 blks * to copy tx_type and txfm_skip arrays. * \param[out] rd_stats_y Struct to keep track of the current * intra-mode's rd_stats (luma only). * \param[in] best_rd Best RD seen for this block so far. * \param[out] mode_cost_y The cost needed to signal the current * intra mode. * \param[out] rd_y The rdcost of the chosen mode. * \param[in] best_model_rd Best model RD seen for this block so far * \param[in] top_intra_model_rd Top intra model RD seen for this * block so far. * * \return Returns 1 if a valid intra mode is found, 0 otherwise. * The corresponding values in x->e_mbd.mi[0], rd_stats_y, mode_cost_y, and * rd_y are also updated. Moreover, in the first evaluation with directional * mode, a prune_mask computed with histogram of gradient is also stored in * intra_search_state. */ int av1_handle_intra_y_mode(IntraModeSearchState *intra_search_state, const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, unsigned int ref_frame_cost, const PICK_MODE_CONTEXT *ctx, RD_STATS *rd_stats_y, int64_t best_rd, int *mode_cost_y, int64_t *rd_y, int64_t *best_model_rd, int64_t top_intra_model_rd[]); /*!\brief Search through all chroma intra-modes for inter frames. * * \ingroup intra_mode_search * \callgraph * \callergraph * This function handles intra-mode chroma prediction when the current frame * is an inter frame. This is done by calling \ref av1_rd_pick_intra_sbuv_mode * with some additional book-keeping. * * \param[in,out] intra_search_state Structure to intra search state. * \param[in] cpi Top-level encoder structure. * \param[in,out] x Pointer to structure holding all the * data for the current macroblock. * \param[in] bsize Current partition block size. * \param[out] rd_stats Struct to keep track of the current * intra-mode's rd_stats (all planes). * \param[out] rd_stats_y Struct to keep track of the current * intra-mode's rd_stats (luma only). * \param[out] rd_stats_uv Struct to keep track of the current * intra-mode's rd_stats (chroma only). * \param[in] best_rd Best RD seen for this block so far. * * \return Returns 1 if a valid intra mode is found, 0 otherwise. * The corresponding values in x->e_mbd.mi[0], rd_stats(_y|_uv) are also * updated. Moreover, in the first evocation of the function, the chroma intra * mode result is cached in intra_search_state to be used in subsequent calls. */ int av1_search_intra_uv_modes_in_interframe( IntraModeSearchState *intra_search_state, const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, RD_STATS *rd_stats, const RD_STATS *rd_stats_y, RD_STATS *rd_stats_uv, int64_t best_rd); /*!\brief Evaluate luma palette mode for inter frames. * * \ingroup intra_mode_search * \callergraph * \callgraph * This function handles luma palette mode when the current frame is an * inter frame. * * \param[in] intra_search_state Structure to hold the best luma intra mode * and cache chroma prediction for speed up. * \param[in] cpi Top-level encoder structure. * \param[in] x Pointer to structure holding all the data * for the current macroblock. * \param[in] bsize Current partition block size. * \param[in] ref_frame_cost The entropy cost for signaling that the * current ref frame is an intra frame. * \param[in] ctx Structure to hold the number of 4x4 blks to * copy the tx_type and txfm_skip arrays. * \param[in] this_rd_cost Struct to keep track of palette mode's * rd_stats. * \param[in] best_rd Best RD seen for this block so far. * * \return Returns whether luma palette mode can skip the txfm. The * corresponding mbmi, this_rd_costs, intra_search_state, and tx_type arrays in * ctx are also updated. */ int av1_search_palette_mode(IntraModeSearchState *intra_search_state, const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, unsigned int ref_frame_cost, PICK_MODE_CONTEXT *ctx, RD_STATS *this_rd_cost, int64_t best_rd); /*!\brief Evaluate luma palette mode for inter frames. * * \ingroup intra_mode_search * \callergraph * \callgraph * This function handles luma palette mode when the current frame is an * inter frame. * * \param[in] cpi Top-level encoder structure. * \param[in] x Pointer to structure holding all the data * for the current macroblock. * \param[in] bsize Current partition block size. * \param[in] ref_frame_cost The entropy cost for signaling that the * current ref frame is an intra frame. * \param[in] ctx Structure to hold the number of 4x4 blks to * copy the tx_type and txfm_skip arrays. * \param[in] this_rd_cost Struct to keep track of palette mode's * rd_stats. * \param[in] best_rd Best RD seen for this block so far. */ void av1_search_palette_mode_luma(const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, unsigned int ref_frame_cost, PICK_MODE_CONTEXT *ctx, RD_STATS *this_rd_cost, int64_t best_rd); /*!\brief Perform intra-mode search on luma channels for intra frames. * * \ingroup intra_mode_search * \callgraph * \callergraph * This function performs intra-mode search on the luma channel when the * current frame is intra-only. This function does not search intrabc mode, * but it does search palette and filter_intra. * * \param[in] cpi Top-level encoder structure. * \param[in] x Pointer to structure holding all the data * for the current macroblock. * \param[in] rate The total rate needed to predict the current * chroma block. * \param[in] rate_tokenonly The rate without the cost of sending the * prediction modes. * chroma block. * after the reconstruction. * \param[in] distortion The chroma distortion of the best prediction * after the reconstruction. * \param[in] skippable Whether we can skip txfm process. * \param[in] bsize Current partition block size. * \param[in] best_rd Best RD seen for this block so far. * \param[in] ctx Structure to hold the number of 4x4 blks to * copy the tx_type and txfm_skip arrays. * * \return Returns the rd_cost if this function finds a mode better than * best_rd, otherwise returns INT64_MAX. This also updates the mbmi, the rate * and distortion, and the tx_type arrays in ctx. */ int64_t av1_rd_pick_intra_sby_mode(const AV1_COMP *const cpi, MACROBLOCK *x, int *rate, int *rate_tokenonly, int64_t *distortion, uint8_t *skippable, BLOCK_SIZE bsize, int64_t best_rd, PICK_MODE_CONTEXT *ctx); /*!\brief Perform intra-mode search on chroma channels. * * \ingroup intra_mode_search * \callergraph * \callgraph * This function performs intra-mode search on the chroma channels. Just like * \ref av1_rd_pick_intra_sby_mode(), this function searches over palette mode * (filter_intra is not available on chroma planes). Unlike \ref * av1_rd_pick_intra_sby_mode() this function is used by both inter and intra * frames. * * \param[in] cpi Top-level encoder structure. * \param[in] x Pointer to structure holding all the data * for the current macroblock. * \param[in] rate The total rate needed to predict the current * chroma block. * \param[in] rate_tokenonly The rate without the cost of sending the * prediction modes. * chroma block. * after the reconstruction. * \param[in] distortion The chroma distortion of the best prediction * after the reconstruction. * \param[in] skippable Whether we can skip txfm process. * \param[in] bsize Current partition block size. * \param[in] max_tx_size The maximum tx_size available * * \return Returns the rd_cost of the best uv mode found. This also updates the * mbmi, the rate and distortion, distortion. */ int64_t av1_rd_pick_intra_sbuv_mode(const AV1_COMP *const cpi, MACROBLOCK *x, int *rate, int *rate_tokenonly, int64_t *distortion, uint8_t *skippable, BLOCK_SIZE bsize, TX_SIZE max_tx_size); /*! \brief Return the number of colors in src. Used by palette mode. */ void av1_count_colors(const uint8_t *src, int stride, int rows, int cols, int *val_count, int *num_colors); /*! \brief See \ref av1_count_colors(), but for highbd. */ void av1_count_colors_highbd(const uint8_t *src8, int stride, int rows, int cols, int bit_depth, int *val_count, int *val_count_8bit, int *num_color_bins, int *num_colors); /*! \brief Initializes the \ref IntraModeSearchState struct. */ static inline void init_intra_mode_search_state( IntraModeSearchState *intra_search_state) { … } /*! \brief set the luma intra mode and delta angles for a given mode index. * The total number of luma intra mode is LUMA_MODE_COUNT = 61. * The first 13 modes are from DC_PRED to PAETH_PRED, followed by directional * modes. Each of the main 8 directional modes have 6 = MAX_ANGLE_DELTA * 2 * delta angles. * \param[in] mode_idx mode index in intra mode decision * process. * \param[in] mbmi Pointer to structure holding the mode * info for the current macroblock. * \param[in] reorder_delta_angle_eval Indicates whether to reorder the * evaluation of delta angle modes. */ void set_y_mode_and_delta_angle(const int mode_idx, MB_MODE_INFO *const mbmi, int reorder_delta_angle_eval); #ifdef __cplusplus } // extern "C" #endif #endif // AOM_AV1_ENCODER_INTRA_MODE_SEARCH_H_
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