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376 lines
15 KiB
C
376 lines
15 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AV1_COMMON_RESTORATION_H_
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#define AV1_COMMON_RESTORATION_H_
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#include "aom_ports/mem.h"
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#include "config/aom_config.h"
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#include "av1/common/blockd.h"
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#include "av1/common/enums.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define CLIP(x, lo, hi) ((x) < (lo) ? (lo) : (x) > (hi) ? (hi) : (x))
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#define RINT(x) ((x) < 0 ? (int)((x)-0.5) : (int)((x) + 0.5))
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#define RESTORATION_PROC_UNIT_SIZE 64
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// Filter tile grid offset upwards compared to the superblock grid
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#define RESTORATION_UNIT_OFFSET 8
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#define SGRPROJ_BORDER_VERT 3 // Vertical border used for Sgr
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#define SGRPROJ_BORDER_HORZ 3 // Horizontal border used for Sgr
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#define WIENER_BORDER_VERT 2 // Vertical border used for Wiener
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#define WIENER_HALFWIN 3
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#define WIENER_BORDER_HORZ (WIENER_HALFWIN) // Horizontal border for Wiener
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// RESTORATION_BORDER_VERT determines line buffer requirement for LR.
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// Should be set at the max of SGRPROJ_BORDER_VERT and WIENER_BORDER_VERT.
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// Note the line buffer needed is twice the value of this macro.
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#if SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
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#define RESTORATION_BORDER_VERT (SGRPROJ_BORDER_VERT)
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#else
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#define RESTORATION_BORDER_VERT (WIENER_BORDER_VERT)
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#endif // SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
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#if SGRPROJ_BORDER_HORZ >= WIENER_BORDER_HORZ
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#define RESTORATION_BORDER_HORZ (SGRPROJ_BORDER_HORZ)
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#else
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#define RESTORATION_BORDER_HORZ (WIENER_BORDER_HORZ)
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#endif // SGRPROJ_BORDER_VERT >= WIENER_BORDER_VERT
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// How many border pixels do we need for each processing unit?
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#define RESTORATION_BORDER 3
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// How many rows of deblocked pixels do we save above/below each processing
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// stripe?
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#define RESTORATION_CTX_VERT 2
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// Additional pixels to the left and right in above/below buffers
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// It is RESTORATION_BORDER_HORZ rounded up to get nicer buffer alignment
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#define RESTORATION_EXTRA_HORZ 4
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// Pad up to 20 more (may be much less is needed)
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#define RESTORATION_PADDING 20
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#define RESTORATION_PROC_UNIT_PELS \
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((RESTORATION_PROC_UNIT_SIZE + RESTORATION_BORDER_HORZ * 2 + \
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RESTORATION_PADDING) * \
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(RESTORATION_PROC_UNIT_SIZE + RESTORATION_BORDER_VERT * 2 + \
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RESTORATION_PADDING))
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#define RESTORATION_UNITSIZE_MAX 256
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#define RESTORATION_UNITPELS_HORZ_MAX \
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(RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_HORZ + 16)
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#define RESTORATION_UNITPELS_VERT_MAX \
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((RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_VERT + \
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RESTORATION_UNIT_OFFSET))
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#define RESTORATION_UNITPELS_MAX \
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(RESTORATION_UNITPELS_HORZ_MAX * RESTORATION_UNITPELS_VERT_MAX)
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// Two 32-bit buffers needed for the restored versions from two filters
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// TODO(debargha, rupert): Refactor to not need the large tilesize to be stored
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// on the decoder side.
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#define SGRPROJ_TMPBUF_SIZE (RESTORATION_UNITPELS_MAX * 2 * sizeof(int32_t))
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#define SGRPROJ_EXTBUF_SIZE (0)
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#define SGRPROJ_PARAMS_BITS 4
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#define SGRPROJ_PARAMS (1 << SGRPROJ_PARAMS_BITS)
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// Precision bits for projection
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#define SGRPROJ_PRJ_BITS 7
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// Restoration precision bits generated higher than source before projection
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#define SGRPROJ_RST_BITS 4
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// Internal precision bits for core selfguided_restoration
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#define SGRPROJ_SGR_BITS 8
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#define SGRPROJ_SGR (1 << SGRPROJ_SGR_BITS)
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#define SGRPROJ_PRJ_MIN0 (-(1 << SGRPROJ_PRJ_BITS) * 3 / 4)
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#define SGRPROJ_PRJ_MAX0 (SGRPROJ_PRJ_MIN0 + (1 << SGRPROJ_PRJ_BITS) - 1)
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#define SGRPROJ_PRJ_MIN1 (-(1 << SGRPROJ_PRJ_BITS) / 4)
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#define SGRPROJ_PRJ_MAX1 (SGRPROJ_PRJ_MIN1 + (1 << SGRPROJ_PRJ_BITS) - 1)
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#define SGRPROJ_PRJ_SUBEXP_K 4
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#define SGRPROJ_BITS (SGRPROJ_PRJ_BITS * 2 + SGRPROJ_PARAMS_BITS)
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#define MAX_RADIUS 2 // Only 1, 2, 3 allowed
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#define MAX_NELEM ((2 * MAX_RADIUS + 1) * (2 * MAX_RADIUS + 1))
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#define SGRPROJ_MTABLE_BITS 20
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#define SGRPROJ_RECIP_BITS 12
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#define WIENER_HALFWIN1 (WIENER_HALFWIN + 1)
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#define WIENER_WIN (2 * WIENER_HALFWIN + 1)
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#define WIENER_WIN2 ((WIENER_WIN) * (WIENER_WIN))
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#define WIENER_TMPBUF_SIZE (0)
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#define WIENER_EXTBUF_SIZE (0)
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// If WIENER_WIN_CHROMA == WIENER_WIN - 2, that implies 5x5 filters are used for
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// chroma. To use 7x7 for chroma set WIENER_WIN_CHROMA to WIENER_WIN.
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#define WIENER_WIN_CHROMA (WIENER_WIN - 2)
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#define WIENER_FILT_PREC_BITS 7
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#define WIENER_FILT_STEP (1 << WIENER_FILT_PREC_BITS)
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// Central values for the taps
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#define WIENER_FILT_TAP0_MIDV (3)
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#define WIENER_FILT_TAP1_MIDV (-7)
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#define WIENER_FILT_TAP2_MIDV (15)
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#define WIENER_FILT_TAP3_MIDV \
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(WIENER_FILT_STEP - 2 * (WIENER_FILT_TAP0_MIDV + WIENER_FILT_TAP1_MIDV + \
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WIENER_FILT_TAP2_MIDV))
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#define WIENER_FILT_TAP0_BITS 4
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#define WIENER_FILT_TAP1_BITS 5
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#define WIENER_FILT_TAP2_BITS 6
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#define WIENER_FILT_BITS \
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((WIENER_FILT_TAP0_BITS + WIENER_FILT_TAP1_BITS + WIENER_FILT_TAP2_BITS) * 2)
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#define WIENER_FILT_TAP0_MINV \
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(WIENER_FILT_TAP0_MIDV - (1 << WIENER_FILT_TAP0_BITS) / 2)
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#define WIENER_FILT_TAP1_MINV \
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(WIENER_FILT_TAP1_MIDV - (1 << WIENER_FILT_TAP1_BITS) / 2)
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#define WIENER_FILT_TAP2_MINV \
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(WIENER_FILT_TAP2_MIDV - (1 << WIENER_FILT_TAP2_BITS) / 2)
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#define WIENER_FILT_TAP0_MAXV \
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(WIENER_FILT_TAP0_MIDV - 1 + (1 << WIENER_FILT_TAP0_BITS) / 2)
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#define WIENER_FILT_TAP1_MAXV \
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(WIENER_FILT_TAP1_MIDV - 1 + (1 << WIENER_FILT_TAP1_BITS) / 2)
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#define WIENER_FILT_TAP2_MAXV \
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(WIENER_FILT_TAP2_MIDV - 1 + (1 << WIENER_FILT_TAP2_BITS) / 2)
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#define WIENER_FILT_TAP0_SUBEXP_K 1
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#define WIENER_FILT_TAP1_SUBEXP_K 2
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#define WIENER_FILT_TAP2_SUBEXP_K 3
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// Max of SGRPROJ_TMPBUF_SIZE, DOMAINTXFMRF_TMPBUF_SIZE, WIENER_TMPBUF_SIZE
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#define RESTORATION_TMPBUF_SIZE (SGRPROJ_TMPBUF_SIZE)
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// Max of SGRPROJ_EXTBUF_SIZE, WIENER_EXTBUF_SIZE
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#define RESTORATION_EXTBUF_SIZE (WIENER_EXTBUF_SIZE)
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// Check the assumptions of the existing code
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#if SUBPEL_TAPS != WIENER_WIN + 1
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#error "Wiener filter currently only works if SUBPEL_TAPS == WIENER_WIN + 1"
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#endif
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#if WIENER_FILT_PREC_BITS != 7
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#error "Wiener filter currently only works if WIENER_FILT_PREC_BITS == 7"
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#endif
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#define LR_TILE_ROW 0
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#define LR_TILE_COL 0
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#define LR_TILE_COLS 1
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typedef struct {
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int r[2]; // radii
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int s[2]; // sgr parameters for r[0] and r[1], based on GenSgrprojVtable()
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} sgr_params_type;
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typedef struct {
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RestorationType restoration_type;
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WienerInfo wiener_info;
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SgrprojInfo sgrproj_info;
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} RestorationUnitInfo;
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// A restoration line buffer needs space for two lines plus a horizontal filter
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// margin of RESTORATION_EXTRA_HORZ on each side.
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#define RESTORATION_LINEBUFFER_WIDTH \
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(RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_EXTRA_HORZ)
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// Similarly, the column buffers (used when we're at a vertical tile edge
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// that we can't filter across) need space for one processing unit's worth
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// of pixels, plus the top/bottom border width
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#define RESTORATION_COLBUFFER_HEIGHT \
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(RESTORATION_PROC_UNIT_SIZE + 2 * RESTORATION_BORDER)
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typedef struct {
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// Temporary buffers to save/restore 3 lines above/below the restoration
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// stripe.
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uint16_t tmp_save_above[RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH];
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uint16_t tmp_save_below[RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH];
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} RestorationLineBuffers;
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typedef struct {
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uint8_t *stripe_boundary_above;
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uint8_t *stripe_boundary_below;
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int stripe_boundary_stride;
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int stripe_boundary_size;
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} RestorationStripeBoundaries;
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typedef struct {
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RestorationType frame_restoration_type;
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int restoration_unit_size;
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// Fields below here are allocated and initialised by
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// av1_alloc_restoration_struct. (horz_)units_per_tile give the number of
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// restoration units in (one row of) the largest tile in the frame. The data
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// in unit_info is laid out with units_per_tile entries for each tile, which
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// have stride horz_units_per_tile.
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//
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// Even if there are tiles of different sizes, the data in unit_info is laid
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// out as if all tiles are of full size.
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int units_per_tile;
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int vert_units_per_tile, horz_units_per_tile;
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RestorationUnitInfo *unit_info;
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RestorationStripeBoundaries boundaries;
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int optimized_lr;
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} RestorationInfo;
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static INLINE void set_default_sgrproj(SgrprojInfo *sgrproj_info) {
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sgrproj_info->xqd[0] = (SGRPROJ_PRJ_MIN0 + SGRPROJ_PRJ_MAX0) / 2;
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sgrproj_info->xqd[1] = (SGRPROJ_PRJ_MIN1 + SGRPROJ_PRJ_MAX1) / 2;
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}
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static INLINE void set_default_wiener(WienerInfo *wiener_info) {
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wiener_info->vfilter[0] = wiener_info->hfilter[0] = WIENER_FILT_TAP0_MIDV;
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wiener_info->vfilter[1] = wiener_info->hfilter[1] = WIENER_FILT_TAP1_MIDV;
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wiener_info->vfilter[2] = wiener_info->hfilter[2] = WIENER_FILT_TAP2_MIDV;
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wiener_info->vfilter[WIENER_HALFWIN] = wiener_info->hfilter[WIENER_HALFWIN] =
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-2 *
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(WIENER_FILT_TAP2_MIDV + WIENER_FILT_TAP1_MIDV + WIENER_FILT_TAP0_MIDV);
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wiener_info->vfilter[4] = wiener_info->hfilter[4] = WIENER_FILT_TAP2_MIDV;
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wiener_info->vfilter[5] = wiener_info->hfilter[5] = WIENER_FILT_TAP1_MIDV;
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wiener_info->vfilter[6] = wiener_info->hfilter[6] = WIENER_FILT_TAP0_MIDV;
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}
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typedef struct {
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int h_start, h_end, v_start, v_end;
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} RestorationTileLimits;
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typedef void (*rest_unit_visitor_t)(const RestorationTileLimits *limits,
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const AV1PixelRect *tile_rect,
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int rest_unit_idx, void *priv,
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int32_t *tmpbuf,
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RestorationLineBuffers *rlbs);
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typedef struct FilterFrameCtxt {
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const RestorationInfo *rsi;
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int tile_stripe0;
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int ss_x, ss_y;
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int highbd, bit_depth;
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uint8_t *data8, *dst8;
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int data_stride, dst_stride;
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AV1PixelRect tile_rect;
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} FilterFrameCtxt;
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typedef struct AV1LrStruct {
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rest_unit_visitor_t on_rest_unit;
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FilterFrameCtxt ctxt[MAX_MB_PLANE];
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YV12_BUFFER_CONFIG *frame;
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YV12_BUFFER_CONFIG *dst;
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} AV1LrStruct;
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extern const sgr_params_type sgr_params[SGRPROJ_PARAMS];
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extern int sgrproj_mtable[SGRPROJ_PARAMS][2];
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extern const int32_t x_by_xplus1[256];
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extern const int32_t one_by_x[MAX_NELEM];
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void av1_alloc_restoration_struct(struct AV1Common *cm, RestorationInfo *rsi,
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int is_uv);
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void av1_free_restoration_struct(RestorationInfo *rst_info);
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void extend_frame(uint8_t *data, int width, int height, int stride,
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int border_horz, int border_vert, int highbd);
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void decode_xq(const int *xqd, int *xq, const sgr_params_type *params);
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// Filter a single loop restoration unit.
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//
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// limits is the limits of the unit. rui gives the mode to use for this unit
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// and its coefficients. If striped loop restoration is enabled, rsb contains
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// deblocked pixels to use for stripe boundaries; rlbs is just some space to
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// use as a scratch buffer. tile_rect gives the limits of the tile containing
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// this unit. tile_stripe0 is the index of the first stripe in this tile.
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//
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// ss_x and ss_y are flags which should be 1 if this is a plane with
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// horizontal/vertical subsampling, respectively. highbd is a flag which should
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// be 1 in high bit depth mode, in which case bit_depth is the bit depth.
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//
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// data8 is the frame data (pointing at the top-left corner of the frame, not
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// the restoration unit) and stride is its stride. dst8 is the buffer where the
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// results will be written and has stride dst_stride. Like data8, dst8 should
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// point at the top-left corner of the frame.
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//
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// Finally tmpbuf is a scratch buffer used by the sgrproj filter which should
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// be at least SGRPROJ_TMPBUF_SIZE big.
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void av1_loop_restoration_filter_unit(
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const RestorationTileLimits *limits, const RestorationUnitInfo *rui,
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const RestorationStripeBoundaries *rsb, RestorationLineBuffers *rlbs,
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const AV1PixelRect *tile_rect, int tile_stripe0, int ss_x, int ss_y,
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int highbd, int bit_depth, uint8_t *data8, int stride, uint8_t *dst8,
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int dst_stride, int32_t *tmpbuf, int optimized_lr);
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void av1_loop_restoration_filter_frame(YV12_BUFFER_CONFIG *frame,
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struct AV1Common *cm, int optimized_lr,
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void *lr_ctxt);
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void av1_loop_restoration_precal();
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typedef void (*rest_tile_start_visitor_t)(int tile_row, int tile_col,
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void *priv);
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struct AV1LrSyncData;
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typedef void (*sync_read_fn_t)(void *const lr_sync, int r, int c, int plane);
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typedef void (*sync_write_fn_t)(void *const lr_sync, int r, int c,
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const int sb_cols, int plane);
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// Call on_rest_unit for each loop restoration unit in the plane.
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void av1_foreach_rest_unit_in_plane(const struct AV1Common *cm, int plane,
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rest_unit_visitor_t on_rest_unit,
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void *priv, AV1PixelRect *tile_rect,
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int32_t *tmpbuf,
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RestorationLineBuffers *rlbs);
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// Return 1 iff the block at mi_row, mi_col with size bsize is a
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// top-level superblock containing the top-left corner of at least one
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// loop restoration unit.
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//
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// If the block is a top-level superblock, the function writes to
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// *rcol0, *rcol1, *rrow0, *rrow1. The rectangle of restoration unit
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// indices given by [*rcol0, *rcol1) x [*rrow0, *rrow1) are relative
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// to the current tile, whose starting index is returned as
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// *tile_tl_idx.
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int av1_loop_restoration_corners_in_sb(const struct AV1Common *cm, int plane,
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int mi_row, int mi_col, BLOCK_SIZE bsize,
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int *rcol0, int *rcol1, int *rrow0,
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int *rrow1);
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void av1_loop_restoration_save_boundary_lines(const YV12_BUFFER_CONFIG *frame,
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struct AV1Common *cm,
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int after_cdef);
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void av1_loop_restoration_filter_frame_init(AV1LrStruct *lr_ctxt,
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YV12_BUFFER_CONFIG *frame,
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struct AV1Common *cm,
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int optimized_lr, int num_planes);
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void av1_loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt,
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struct AV1Common *cm, int num_planes);
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void av1_foreach_rest_unit_in_row(
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RestorationTileLimits *limits, const AV1PixelRect *tile_rect,
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rest_unit_visitor_t on_rest_unit, int row_number, int unit_size,
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int unit_idx0, int hunits_per_tile, int vunits_per_tile, int plane,
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void *priv, int32_t *tmpbuf, RestorationLineBuffers *rlbs,
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sync_read_fn_t on_sync_read, sync_write_fn_t on_sync_write,
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struct AV1LrSyncData *const lr_sync);
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AV1PixelRect av1_whole_frame_rect(const struct AV1Common *cm, int is_uv);
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int av1_lr_count_units_in_tile(int unit_size, int tile_size);
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void av1_lr_sync_read_dummy(void *const lr_sync, int r, int c, int plane);
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void av1_lr_sync_write_dummy(void *const lr_sync, int r, int c,
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const int sb_cols, int plane);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AV1_COMMON_RESTORATION_H_
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