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111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
#pragma once
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/*****************************************************************************
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* This file is part of Kvazaar HEVC encoder.
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*
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* Copyright (C) 2013-2015 Tampere University of Technology and others (see
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* COPYING file).
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*
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* Kvazaar is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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*
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* Kvazaar is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with Kvazaar. If not, see <http://www.gnu.org/licenses/>.
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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 "kvazaar.h"
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typedef struct {
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kvz_pixel left[2 * 128 + 3];
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kvz_pixel top[2 * 128 + 3];
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} kvz_intra_ref;
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typedef struct
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{
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kvz_intra_ref ref;
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kvz_intra_ref filtered_ref;
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bool filtered_initialized;
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} kvz_intra_references;
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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 kvz_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 Generage angular predictions.
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* \param width Width in pixels, range 4..32.
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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 out_left_ref Left reference pixels, index 0 is the top-left.
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* \param out_top_ref Top reference pixels, index 0 is the top-left.
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*/
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void kvz_intra_build_reference(
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const int_fast8_t log2_width,
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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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kvz_intra_references *const refs,
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bool entropy_sync);
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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 kvz_intra_predict(
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encoder_state_t *const state,
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kvz_intra_references *refs,
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int_fast8_t log2_width,
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int_fast8_t mode,
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color_t color,
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kvz_pixel *dst,
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bool filter_boundary);
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void kvz_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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int8_t mode_luma,
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int8_t mode_chroma,
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cu_info_t *cur_cu,
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lcu_t *lcu);
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