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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 AV1_COMMON_RESTORATION_H_
#define AV1_COMMON_RESTORATION_H_
#include "aom_ports/mem.h"
#include "./aom_config.h"
#include "av1/common/blockd.h"
#ifdef __cplusplus
extern "C" {
#endif
#define CLIP(x, lo, hi) ((x) < (lo) ? (lo) : (x) > (hi) ? (hi) : (x))
#define RINT(x) ((x) < 0 ? (int)((x)-0.5) : (int)((x) + 0.5))
#define RESTORATION_PROC_UNIT_SIZE 64
#if CONFIG_STRIPED_LOOP_RESTORATION
// Filter tile grid offset upwards compared to the superblock grid
#define RESTORATION_TILE_OFFSET 8
#endif
#if CONFIG_STRIPED_LOOP_RESTORATION
#define SGRPROJ_BORDER_VERT 2 // Vertical border used for Sgr
#else
#define SGRPROJ_BORDER_VERT 1 // Vertical border used for Sgr
#endif
#define SGRPROJ_BORDER_HORZ 2 // Horizontal border used for Sgr
#if CONFIG_STRIPED_LOOP_RESTORATION
#define WIENER_BORDER_VERT 2 // Vertical border used for Wiener
#else
#define WIENER_BORDER_VERT 3 // Vertical border used for Wiener
#endif
#define WIENER_HALFWIN 3
#define WIENER_BORDER_HORZ (WIENER_HALFWIN) // Horizontal border for Wiener
// RESTORATION_BORDER_VERT determines line buffer requirement for LR.
// Should be set at the max of SGRPROJ_BORDER_VERT and WIENER_BORDER_VERT.
// Note the line buffer needed is twice the value of this macro.
#if SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
#define RESTORATION_BORDER_VERT (SGRPROJ_BORDER_VERT)
#else
#define RESTORATION_BORDER_VERT (WIENER_BORDER_VERT)
#endif // SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
#if SGRPROJ_BORDER_HORZ >= WIENER_BORDER_HORZ
#define RESTORATION_BORDER_HORZ (SGRPROJ_BORDER_HORZ)
#else
#define RESTORATION_BORDER_HORZ (WIENER_BORDER_HORZ)
#endif // SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
#if CONFIG_STRIPED_LOOP_RESTORATION
// Additional pixels to the left and right in above/below buffers
// It is RESTORATION_BORDER_HORZ rounded up to get nicer buffer alignment
#define RESTORATION_EXTRA_HORZ 4
#endif
// Pad up to 20 more (may be much less is needed)
#define RESTORATION_PADDING 20
#define RESTORATION_PROC_UNIT_PELS \
((RESTORATION_PROC_UNIT_SIZE + RESTORATION_BORDER_HORZ * 2 + \
RESTORATION_PADDING) * \
(RESTORATION_PROC_UNIT_SIZE + RESTORATION_BORDER_VERT * 2 + \
RESTORATION_PADDING))
#define RESTORATION_TILESIZE_MAX 256
#if CONFIG_STRIPED_LOOP_RESTORATION
#define RESTORATION_TILEPELS_HORZ_MAX \
(RESTORATION_TILESIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_HORZ + 16)
#define RESTORATION_TILEPELS_VERT_MAX \
((RESTORATION_TILESIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_VERT + \
RESTORATION_TILE_OFFSET))
#define RESTORATION_TILEPELS_MAX \
(RESTORATION_TILEPELS_HORZ_MAX * RESTORATION_TILEPELS_VERT_MAX)
#else
#define RESTORATION_TILEPELS_MAX \
((RESTORATION_TILESIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_HORZ + 16) * \
(RESTORATION_TILESIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_VERT))
#endif
// Two 32-bit buffers needed for the restored versions from two filters
// TODO(debargha, rupert): Refactor to not need the large tilesize to be stored
// on the decoder side.
#define SGRPROJ_TMPBUF_SIZE (RESTORATION_TILEPELS_MAX * 2 * sizeof(int32_t))
#define SGRPROJ_EXTBUF_SIZE (0)
#define SGRPROJ_PARAMS_BITS 4
#define SGRPROJ_PARAMS (1 << SGRPROJ_PARAMS_BITS)
#define USE_HIGHPASS_IN_SGRPROJ 0
// Precision bits for projection
#define SGRPROJ_PRJ_BITS 7
// Restoration precision bits generated higher than source before projection
#define SGRPROJ_RST_BITS 4
// Internal precision bits for core selfguided_restoration
#define SGRPROJ_SGR_BITS 8
#define SGRPROJ_SGR (1 << SGRPROJ_SGR_BITS)
#if USE_HIGHPASS_IN_SGRPROJ
#define SGRPROJ_PRJ_MIN0 (-(1 << SGRPROJ_PRJ_BITS) / 8)
#define SGRPROJ_PRJ_MAX0 (SGRPROJ_PRJ_MIN0 + (1 << SGRPROJ_PRJ_BITS) - 1)
#define SGRPROJ_PRJ_MIN1 (-(1 << SGRPROJ_PRJ_BITS) / 2)
#define SGRPROJ_PRJ_MAX1 (SGRPROJ_PRJ_MIN1 + (1 << SGRPROJ_PRJ_BITS) - 1)
#else
#define SGRPROJ_PRJ_MIN0 (-(1 << SGRPROJ_PRJ_BITS) * 3 / 4)
#define SGRPROJ_PRJ_MAX0 (SGRPROJ_PRJ_MIN0 + (1 << SGRPROJ_PRJ_BITS) - 1)
#define SGRPROJ_PRJ_MIN1 (-(1 << SGRPROJ_PRJ_BITS) / 4)
#define SGRPROJ_PRJ_MAX1 (SGRPROJ_PRJ_MIN1 + (1 << SGRPROJ_PRJ_BITS) - 1)
#endif // USE_HIGHPASS_IN_SGRPROJ
#define SGRPROJ_PRJ_SUBEXP_K 4
#define SGRPROJ_BITS (SGRPROJ_PRJ_BITS * 2 + SGRPROJ_PARAMS_BITS)
#define MAX_RADIUS 2 // Only 1, 2, 3 allowed
#define MAX_EPS 80 // Max value of eps
#define MAX_NELEM ((2 * MAX_RADIUS + 1) * (2 * MAX_RADIUS + 1))
#define SGRPROJ_MTABLE_BITS 20
#define SGRPROJ_RECIP_BITS 12
#define WIENER_HALFWIN1 (WIENER_HALFWIN + 1)
#define WIENER_WIN (2 * WIENER_HALFWIN + 1)
#define WIENER_WIN2 ((WIENER_WIN) * (WIENER_WIN))
#define WIENER_TMPBUF_SIZE (0)
#define WIENER_EXTBUF_SIZE (0)
// If WIENER_WIN_CHROMA == WIENER_WIN - 2, that implies 5x5 filters are used for
// chroma. To use 7x7 for chroma set WIENER_WIN_CHROMA to WIENER_WIN.
#define WIENER_WIN_CHROMA (WIENER_WIN - 2)
#define WIENER_FILT_PREC_BITS 7
#define WIENER_FILT_STEP (1 << WIENER_FILT_PREC_BITS)
// Whether to use high intermediate precision filtering
#define USE_WIENER_HIGH_INTERMEDIATE_PRECISION 1
// Central values for the taps
#define WIENER_FILT_TAP0_MIDV (3)
#define WIENER_FILT_TAP1_MIDV (-7)
#define WIENER_FILT_TAP2_MIDV (15)
#define WIENER_FILT_TAP3_MIDV \
(WIENER_FILT_STEP - \
2 * (WIENER_FILT_TAP0_MIDV + WIENER_FILT_TAP1_MIDV + \
WIENER_FILT_TAP2_MIDV))
#define WIENER_FILT_TAP0_BITS 4
#define WIENER_FILT_TAP1_BITS 5
#define WIENER_FILT_TAP2_BITS 6
#define WIENER_FILT_BITS \
((WIENER_FILT_TAP0_BITS + WIENER_FILT_TAP1_BITS + WIENER_FILT_TAP2_BITS) * 2)
#define WIENER_FILT_TAP0_MINV \
(WIENER_FILT_TAP0_MIDV - (1 << WIENER_FILT_TAP0_BITS) / 2)
#define WIENER_FILT_TAP1_MINV \
(WIENER_FILT_TAP1_MIDV - (1 << WIENER_FILT_TAP1_BITS) / 2)
#define WIENER_FILT_TAP2_MINV \
(WIENER_FILT_TAP2_MIDV - (1 << WIENER_FILT_TAP2_BITS) / 2)
#define WIENER_FILT_TAP0_MAXV \
(WIENER_FILT_TAP0_MIDV - 1 + (1 << WIENER_FILT_TAP0_BITS) / 2)
#define WIENER_FILT_TAP1_MAXV \
(WIENER_FILT_TAP1_MIDV - 1 + (1 << WIENER_FILT_TAP1_BITS) / 2)
#define WIENER_FILT_TAP2_MAXV \
(WIENER_FILT_TAP2_MIDV - 1 + (1 << WIENER_FILT_TAP2_BITS) / 2)
#define WIENER_FILT_TAP0_SUBEXP_K 1
#define WIENER_FILT_TAP1_SUBEXP_K 2
#define WIENER_FILT_TAP2_SUBEXP_K 3
// Max of SGRPROJ_TMPBUF_SIZE, DOMAINTXFMRF_TMPBUF_SIZE, WIENER_TMPBUF_SIZE
#define RESTORATION_TMPBUF_SIZE (SGRPROJ_TMPBUF_SIZE)
// Max of SGRPROJ_EXTBUF_SIZE, WIENER_EXTBUF_SIZE
#define RESTORATION_EXTBUF_SIZE (WIENER_EXTBUF_SIZE)
// Check the assumptions of the existing code
#if SUBPEL_TAPS != WIENER_WIN + 1
#error "Wiener filter currently only works if SUBPEL_TAPS == WIENER_WIN + 1"
#endif
#if WIENER_FILT_PREC_BITS != 7
#error "Wiener filter currently only works if WIENER_FILT_PREC_BITS == 7"
#endif
typedef struct {
#if USE_HIGHPASS_IN_SGRPROJ
int corner;
int edge;
#else
int r1;
int e1;
#endif // USE_HIGHPASS_IN_SGRPROJ
int r2;
int e2;
} sgr_params_type;
typedef struct {
RestorationType restoration_type;
WienerInfo wiener_info;
SgrprojInfo sgrproj_info;
} RestorationUnitInfo;
#if CONFIG_STRIPED_LOOP_RESTORATION
// A restoration line buffer needs space for two lines plus a horizontal filter
// margin of RESTORATION_EXTRA_HORZ on each side.
#define RESTORATION_LINEBUFFER_WIDTH \
(RESTORATION_TILESIZE_MAX * 3 / 2 + 2 * RESTORATION_EXTRA_HORZ)
typedef struct {
// Temporary buffers to save/restore 3 lines above/below the restoration
// stripe.
uint16_t tmp_save_above[3][RESTORATION_LINEBUFFER_WIDTH];
uint16_t tmp_save_below[3][RESTORATION_LINEBUFFER_WIDTH];
} RestorationLineBuffers;
typedef struct {
uint8_t *stripe_boundary_above;
uint8_t *stripe_boundary_below;
int stripe_boundary_stride;
} RestorationStripeBoundaries;
#endif
typedef struct {
RestorationType frame_restoration_type;
int restoration_unit_size;
int procunit_width, procunit_height;
// Fields below here are allocated and initialised by
// av1_alloc_restoration_struct. (horz_)units_per_tile give the number of
// restoration units in (one row of) the largest tile in the frame. The data
// in unit_info is laid out with units_per_tile entries for each tile, which
// have stride horz_units_per_tile.
//
// Even if there are tiles of different sizes, the data in unit_info is laid
// out as if all tiles are of full size.
int units_per_tile;
int vert_units_per_tile, horz_units_per_tile;
RestorationUnitInfo *unit_info;
#if CONFIG_STRIPED_LOOP_RESTORATION
RestorationStripeBoundaries boundaries;
#endif
} RestorationInfo;
static INLINE void set_default_sgrproj(SgrprojInfo *sgrproj_info) {
sgrproj_info->xqd[0] = (SGRPROJ_PRJ_MIN0 + SGRPROJ_PRJ_MAX0) / 2;
sgrproj_info->xqd[1] = (SGRPROJ_PRJ_MIN1 + SGRPROJ_PRJ_MAX1) / 2;
}
static INLINE void set_default_wiener(WienerInfo *wiener_info) {
wiener_info->vfilter[0] = wiener_info->hfilter[0] = WIENER_FILT_TAP0_MIDV;
wiener_info->vfilter[1] = wiener_info->hfilter[1] = WIENER_FILT_TAP1_MIDV;
wiener_info->vfilter[2] = wiener_info->hfilter[2] = WIENER_FILT_TAP2_MIDV;
wiener_info->vfilter[WIENER_HALFWIN] = wiener_info->hfilter[WIENER_HALFWIN] =
-2 *
(WIENER_FILT_TAP2_MIDV + WIENER_FILT_TAP1_MIDV + WIENER_FILT_TAP0_MIDV);
wiener_info->vfilter[4] = wiener_info->hfilter[4] = WIENER_FILT_TAP2_MIDV;
wiener_info->vfilter[5] = wiener_info->hfilter[5] = WIENER_FILT_TAP1_MIDV;
wiener_info->vfilter[6] = wiener_info->hfilter[6] = WIENER_FILT_TAP0_MIDV;
}
typedef struct { int h_start, h_end, v_start, v_end; } RestorationTileLimits;
extern const sgr_params_type sgr_params[SGRPROJ_PARAMS];
extern int sgrproj_mtable[MAX_EPS][MAX_NELEM];
extern const int32_t x_by_xplus1[256];
extern const int32_t one_by_x[MAX_NELEM];
void av1_alloc_restoration_struct(struct AV1Common *cm, RestorationInfo *rsi,
int is_uv);
void av1_free_restoration_struct(RestorationInfo *rst_info);
void extend_frame(uint8_t *data, int width, int height, int stride,
int border_horz, int border_vert, int highbd);
void decode_xq(const int *xqd, int *xq);
// Filter a single loop restoration unit.
//
// limits is the limits of the unit. rui gives the mode to use for this unit
// and its coefficients. If striped loop restoration is enabled, rsb contains
// deblocked pixels to use for stripe boundaries; rlbs is just some space to
// use as a scratch buffer. ss_y is a flag which should be 1 if this is a plane
// with vertical subsampling.
//
// procunit_width and procunit_height are the width and height in which to
// process the data. highbd is a flag which should be 1 in high bit depth mode,
// in which case bit_depth is the bit depth.
//
// data8 is the frame data (pointing at the top-left corner of the frame, not
// the restoration unit) and stride is its stride. dst8 is the buffer where the
// results will be written and has stride dst_stride. Like data8, dst8 should
// point at the top-left corner of the frame.
//
// Finally tmpbuf is a scratch buffer used by the sgrproj filter which should
// be at least SGRPROJ_TMPBUF_SIZE big.
void av1_loop_restoration_filter_unit(const RestorationTileLimits *limits,
const RestorationUnitInfo *rui,
#if CONFIG_STRIPED_LOOP_RESTORATION
const RestorationStripeBoundaries *rsb,
RestorationLineBuffers *rlbs, int ss_y,
#endif
int procunit_height, int procunit_width,
int highbd, int bit_depth, uint8_t *data8,
int stride, uint8_t *dst8, int dst_stride,
int32_t *tmpbuf);
void av1_loop_restoration_filter_frame(YV12_BUFFER_CONFIG *frame,
struct AV1Common *cm,
RestorationInfo *rsi,
int components_pattern,
YV12_BUFFER_CONFIG *dst);
void av1_loop_restoration_precal();
typedef void (*rest_unit_visitor_t)(const RestorationTileLimits *limits,
int rest_unit_idx, void *priv);
typedef void (*rest_tile_start_visitor_t)(int tile_row, int tile_col,
void *priv);
// Call on_rest_unit for each loop restoration unit in the frame. At the start
// of each tile, call on_tile.
void av1_foreach_rest_unit_in_frame(const struct AV1Common *cm, int plane,
rest_tile_start_visitor_t on_tile,
rest_unit_visitor_t on_rest_unit,
void *priv);
// Return 1 iff the block at mi_row, mi_col with size bsize is a
// top-level superblock containing the top-left corner of at least one
// loop restoration tile.
//
// If the block is a top-level superblock, the function writes to
// *rcol0, *rcol1, *rrow0, *rrow1. The rectangle of restoration unit
// indices given by [*rcol0, *rcol1) x [*rrow0, *rrow1) are relative
// to the current tile, whose starting index is returned as
// *tile_tl_idx.
int av1_loop_restoration_corners_in_sb(const struct AV1Common *cm, int plane,
int mi_row, int mi_col, BLOCK_SIZE bsize,
int *rcol0, int *rcol1, int *rrow0,
int *rrow1, int *tile_tl_idx);
void av1_loop_restoration_save_boundary_lines(const YV12_BUFFER_CONFIG *frame,
struct AV1Common *cm);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AV1_COMMON_RESTORATION_H_