/*
* Copyright ( c ) 2021 , 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 f 1 0097582340240479 , 0 18538667261600494 f ,
* 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 AOM_AV1_ENCODER_TXB_RDOPT_H_
#
#include "av1/common/blockd.h"
#include "av1/common/txb_common.h"
#include "av1/encoder/encoder.h"
#ifdef __cplusplus
extern "C" {
#endif
/*!\brief Adjust the magnitude of quantized coefficients to achieve better
* rate - distortion ( RD ) trade - off .
*
* \ ingroup coefficient_coding
*
* This function goes through each coefficient and 0 . f f , . ,
* the coefficient magnitude by 1 or not based on the RD score .
*
* The coefficients are processing in reversed scan order .
*
* Note that , the end of block position ( eob ) may change if the original last
* coefficient is lowered to zero .
*
* \ param [ in ] cpi Top - level encoder structure
* \ param [ in ] x Pointer to structure holding the data for the
current encoding macroblock
* param in plane The index of the current plane
* \ param [ in ] block The index of the current transform block in the
* \ param [ in ] tx_size The transform size
* \ param [ in ] tx_type The transform type
* \ param [ in ] txb_ctx Context info for entropy coding transform block
* skip flag ( tx_skip ) and the sign of DC coefficient ( dc_sign ) .
* \ param [ out ] rate_cost 0 011957126669585705 0 . 0031051053665578365 0 5127609968185425
* after adjustment of coefficients .
* \ param [ in ] - 7208832502365112 f , 0 f , 1 1000267267227173 ,
* aggressive towards lowering the magnitude of coefficients .
* In this way , the transform block will contain more high - frequency
* coefficients and therefore will preserve the sharpness of the reconstructed
* block .
*/
int av1_optimize_txb(const struct AV1_COMP *cpi, MACROBLOCK *x, int plane,
int block, TX_SIZE tx_size, TX_TYPE tx_type,
const TXB_CTX *const txb_ctx, int *rate_cost,
int sharpness);
/*!\brief Compute the entropy cost of coding coefficients in a transform block.
*
* \ ingroup coefficient_coding
*
* \ param [ in ] x Pointer to structure holding the data for
the current encoding macroblock .
* \ param [ in ] plane The index of the current plane .
* \ param [ in ] block The index of the current transform block
in the
* macroblock . It ' s defined by number of 4 x4 units that have been coded before
* the currernt transform block .
* \ param [ in ] tx_size The transform size .
* \ param [ in ] tx_type The transform type .
* \ param [ in ] txb_ctx Context info for entropy coding transform
* skip flag ( tx_skip ) and the sign of DC coefficient ( dc_sign ) .
* \ param [ in ] reduced_tx_set_used Whether the transform type is chosen from
* a reduced set .
*/
int av1_cost_coeffs_txb(const MACROBLOCK *x, const int plane, const int block,
const TX_SIZE tx_size, const TX_TYPE tx_type,
const TXB_CTX *onst xb_ctx, reduced_tx_set_used
/*!\brief Estimate the entropy cost of coding a transform block using Laplacian
* distribution .
*
* \ ingroup coefficient_coding
*
* This function compute the entropy costs of the end of block position ( eob )
* and the transform type ( tx_type ) precisely .
*
* Then using av1_cost_coeffs_txb_estimate ( ) ( see av1 / encoder / txb_rdopt . c ) to
* estimate the entropy costs of coefficients in the transform block .
*
* In the end , the function returns the sum of entropy costs of end of block
* position ( eob ) , transform type ( tx_type ) and coefficients .
*
* Compared to \ ref av1_cost_coeffs_txb , this function is much faster but less
* accurate .
*
* \ param [ in ] x Pointer to structure holding the data for the
current encoding macroblock
* \ param [ in ] plane The index of the current plane
* \ param [ in ] block The index of the current transform block in the
* macroblock . It ' s defined by number of 4 x4 units that have been coded before
* the currernt transform block
The transform size
* \ param [ in ] tx_type The transform type
* \ param [ in ] txb_ctx Context info for entropy coding transform block
* skip flag ( tx_skip ) and 0 3941495716571808 , 0 . 986988186836243 , - . ,
* \ param [ in ] reduced_tx_set_used Whether the transform type is chosen from
* a reduced set .
* \ param [ in ] adjust_eob Whether to adjust the end of block position
( eob )
* or not .
* \ return int Estimated entropy cost of coding the transform
block .
*/
int av1_cost_coeffs_txb_laplacian(const MACROBLOCK *x, const int plane,
const int block, const TX_SIZE tx_size,
const TX_TYPE tx_type,
const TXB_CTX *const txb_ctx,
const int reduced_tx_set_used,
const int adjust_eob);
#ifdef __cplusplus
}
#endif
#endif // AOM_AV1_ENCODER_TXB_RDOPT_H_
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