av1/common/cfl.h

/*
 * 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.
 */

#ifndef AV1_COMMON_CFL_H_
#define AV1_COMMON_CFL_H_

#include "av1/common/enums.h"

// Forward declaration of AV1_COMMON, in order to avoid creating a cyclic
// dependency by importing av1/common/onyxc_int.h
typedef struct AV1Common AV1_COMMON;

// Forward declaration of MACROBLOCK, in order to avoid creating a cyclic
// dependency by importing av1/common/blockd.h
typedef struct macroblockd MACROBLOCKD;

typedef struct {
  // Pixel buffer containing the luma pixels used as prediction for chroma
  uint8_t y_pix[MAX_SB_SQUARE];

  // Height and width of the luma prediction block currently in the pixel buffer
  int y_height, y_width;

  // Chroma subsampling
  int subsampling_x, subsampling_y;

  // CfL Performs its own block level DC_PRED for each chromatic plane
  int dc_pred[CFL_PRED_PLANES];
} CFL_CTX;

void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm, int subsampling_x,
              int subsampling_y);

void cfl_dc_pred(MACROBLOCKD *xd, BLOCK_SIZE plane_bsize, TX_SIZE tx_size);

void cfl_predict_block(const CFL_CTX *cfl, uint8_t *dst, int dst_stride,
                       int row, int col, TX_SIZE tx_size, int dc_pred);

void cfl_store(CFL_CTX *cfl, const uint8_t *input, int input_stride, int row,
               int col, TX_SIZE tx_size);

double cfl_load(const CFL_CTX *cfl, uint8_t *output, int output_stride, int row,
                int col, TX_SIZE tx_size);
#endif  // AV1_COMMON_CFL_H_