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162 lines
5.3 KiB
C
162 lines
5.3 KiB
C
#pragma once
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/*****************************************************************************
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* This file is part of uvg266 VVC encoder.
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*
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* Copyright (c) 2021, Tampere University, ITU/ISO/IEC, project contributors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* * Neither the name of the Tampere University or ITU/ISO/IEC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
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****************************************************************************/
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/**
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* \ingroup Reconstruction
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* \file
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* Intra prediction.
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*/
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#include "cu.h"
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#include "encoderstate.h"
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#include "global.h" // IWYU pragma: keep
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#include "uvg266.h"
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// Maximum possible reference line length for intra blocks
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#define INTRA_REF_LENGTH (2 * 128 + 3 + 33 * MAX_REF_LINE_IDX)
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typedef struct {
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uvg_pixel left[INTRA_REF_LENGTH];
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uvg_pixel top[INTRA_REF_LENGTH];
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} uvg_intra_ref;
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typedef struct
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{
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uvg_intra_ref ref;
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uvg_intra_ref filtered_ref;
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bool filtered_initialized;
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} uvg_intra_references;
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typedef struct
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{
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int16_t a;
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int16_t shift;
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int16_t b;
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} cclm_parameters_t;
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typedef struct {
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cu_info_t pred_cu;
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cclm_parameters_t cclm_parameters[2];
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double cost;
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double bits;
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double coeff_bits;
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double distortion;
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double lfnst_costs[3];
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} intra_search_data_t ;
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#define UVG_NUM_INTRA_MODES 67
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/**
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* \brief Function for deriving intra luma predictions
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* \param x x-coordinate of the PU in pixels
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* \param y y-coordinate of the PU in pixels
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* \param preds output buffer for 3 predictions
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* \param cur_pu PU to check
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* \param left_pu PU to the left of cur_pu
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* \param above_pu PU above cur_pu
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* \returns 1 if predictions are found, otherwise 0
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*/
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int8_t uvg_intra_get_dir_luma_predictor(
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const uint32_t x,
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const uint32_t y,
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int8_t *preds,
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const cu_info_t *const cur_pu,
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const cu_info_t *const left_pu,
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const cu_info_t *const above_pu);
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/**
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* \brief Build intra prediction reference buffers.
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* \param log2_width Log2 of width, range 2..5.
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* \param color What color pixels to use.
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* \param luma_px Luma coordinates of the prediction block.
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* \param pic_px Picture dimensions in luma pixels.
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* \param lcu LCU struct.
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* \param refs Pointer to top and left references.
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* \param entropy_sync Indicate that top right is not available if WPP is enabled.
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* \param extra_refs Additional left edge reference lines for use with MRL.
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* \param multi_ref_idx Multi reference line index for the prediction block.
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*/
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void uvg_intra_build_reference(
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const cu_loc_t* const cu_loc,
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const color_t color,
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const vector2d_t *const luma_px,
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const vector2d_t *const pic_px,
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const lcu_t *const lcu,
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uvg_intra_references *const refs,
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bool entropy_sync,
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uvg_pixel *extra_refs,
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uint8_t multi_ref_idx);
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/**
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* \brief Generate intra predictions.
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* \param refs Reference pixels used for the prediction.
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* \param log2_width Width of the predicted block.
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* \param mode Intra mode used for the prediction.
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* \param color Color of the prediction.
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* \param dst Buffer for the predicted pixels.
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* \param filter_boundary Whether to filter the boundary on modes 10 and 26.
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*/
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void uvg_intra_predict(
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const encoder_state_t* const state,
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uvg_intra_references* const refs,
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const cu_loc_t* const cu_loc,
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const color_t color,
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uvg_pixel* dst,
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const intra_search_data_t* data,
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const lcu_t* lcu,
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enum uvg_tree_type tree_type
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);
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void uvg_intra_recon_cu(
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encoder_state_t* const state,
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int x,
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int y,
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int depth,
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intra_search_data_t* search_data,
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cu_info_t *cur_cu,
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lcu_t *lcu,
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enum uvg_tree_type tree_type,
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bool recon_luma,
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bool recon_chroma);
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const cu_info_t* uvg_get_co_located_luma_cu(
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int x,
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int y,
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int width,
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int height,
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const lcu_t* const lcu,
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const cu_array_t* const cu_array,
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enum uvg_tree_type tree_type);
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int uvg_get_mip_flag_context(int x, int y, int width, int height, const lcu_t* lcu, cu_array_t* const cu_a);
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