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/*
* 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 AOM_AV1_COMMON_CDEF_H_
#define AOM_AV1_COMMON_CDEF_H_
#define CDEF_STRENGTH_BITS 6
#define CDEF_PRI_STRENGTHS 16
#define CDEF_SEC_STRENGTHS 4
#include "config/aom_config.h"
#include "aom/aom_integer.h"
#include "aom_ports/mem.h"
#include "av1/common/av1_common_int.h"
#include "av1/common/cdef_block.h"
enum { TOP, LEFT, BOTTOM, RIGHT, BOUNDARIES } UENUM1BYTE(BOUNDARY);
struct AV1CdefSyncData;
/*!\brief Parameters related to CDEF Block */
typedef struct {
uint16_t *src; /*!< CDEF intermediate buffer */
uint16_t *top_linebuf[MAX_MB_PLANE]; /*!< CDEF top line buffer */
uint16_t *bot_linebuf[MAX_MB_PLANE]; /*!< CDEF bottom line buffer */
uint8_t *dst; /*!< CDEF destination buffer */
cdef_list
dlist[MI_SIZE_64X64 * MI_SIZE_64X64]; /*!< CDEF 8x8 block positions */
int xdec; /*!< Sub-sampling X */
int ydec; /*!< Sub-sampling X */
int mi_wide_l2; /*!< Pixels per mi unit in width */
int mi_high_l2; /*!< Pixels per mi unit in height */
int frame_boundary[BOUNDARIES]; /*!< frame boundaries */
int damping; /*!< CDEF damping factor */
int coeff_shift; /*!< Bit-depth based shift for calculating filter strength */
int level; /*!< CDEF filtering level */
int sec_strength; /*!< CDEF secondary strength */
int cdef_count; /*!< Number of CDEF sub-blocks in superblock */
int dir[CDEF_NBLOCKS]
[CDEF_NBLOCKS]; /*!< CDEF filter direction for all 8x8 sub-blocks*/
int var[CDEF_NBLOCKS][CDEF_NBLOCKS]; /*!< variance for all 8x8 sub-blocks */
int dst_stride; /*!< CDEF destination buffer stride */
int coffset; /*!< current superblock offset in a row */
int roffset; /*!< current row offset */
} CdefBlockInfo;
static INLINE int sign(int i) { return i < 0 ? -1 : 1; }
static INLINE int constrain(int diff, int threshold, int damping) {
if (!threshold) return 0;
const int shift = AOMMAX(0, damping - get_msb(threshold));
return sign(diff) *
AOMMIN(abs(diff), AOMMAX(0, threshold - (abs(diff) >> shift)));
}
#ifdef __cplusplus
extern "C" {
#endif
int av1_cdef_compute_sb_list(const CommonModeInfoParams *const mi_params,
int mi_row, int mi_col, cdef_list *dlist,
BLOCK_SIZE bsize);
typedef void (*cdef_init_fb_row_t)(
const AV1_COMMON *const cm, const MACROBLOCKD *const xd,
CdefBlockInfo *const fb_info, uint16_t **const linebuf, uint16_t *const src,
struct AV1CdefSyncData *const cdef_sync, int fbr);
/*!\brief Function for applying CDEF to a frame
*
* \ingroup in_loop_cdef
* This function applies CDEF to a frame.
*
* \param[in, out] frame Compressed frame buffer
* \param[in, out] cm Pointer to top level common structure
* \param[in] xd Pointer to common current coding block structure
* \param[in] cdef_init_fb_row_fn Function Pointer
*
* \remark Nothing is returned. Instead, the filtered frame is output in
* \c frame.
*/
void av1_cdef_frame(YV12_BUFFER_CONFIG *frame, AV1_COMMON *const cm,
MACROBLOCKD *xd, cdef_init_fb_row_t cdef_init_fb_row_fn);
void av1_cdef_fb_row(const AV1_COMMON *const cm, MACROBLOCKD *xd,
uint16_t **const linebuf, uint16_t **const colbuf,
uint16_t *const src, int fbr,
cdef_init_fb_row_t cdef_init_fb_row_fn,
struct AV1CdefSyncData *const cdef_sync,
struct aom_internal_error_info *error_info);
void av1_cdef_init_fb_row(const AV1_COMMON *const cm,
const MACROBLOCKD *const xd,
CdefBlockInfo *const fb_info,
uint16_t **const linebuf, uint16_t *const src,
struct AV1CdefSyncData *const cdef_sync, int fbr);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_COMMON_CDEF_H_
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