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Diffstat (limited to 'media/libaom/src/av1/common/restoration.h')
| -rw-r--r-- | media/libaom/src/av1/common/restoration.h | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/media/libaom/src/av1/common/restoration.h b/media/libaom/src/av1/common/restoration.h new file mode 100644 index 000000000..d834f9270 --- /dev/null +++ b/media/libaom/src/av1/common/restoration.h @@ -0,0 +1,377 @@ +/* + * 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_RESTORATION_H_ +#define AOM_AV1_COMMON_RESTORATION_H_ + +#include "aom_ports/mem.h" +#include "config/aom_config.h" + +#include "av1/common/blockd.h" +#include "av1/common/enums.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 + +// Filter tile grid offset upwards compared to the superblock grid +#define RESTORATION_UNIT_OFFSET 8 + +#define SGRPROJ_BORDER_VERT 3 // Vertical border used for Sgr +#define SGRPROJ_BORDER_HORZ 3 // Horizontal border used for Sgr + +#define WIENER_BORDER_VERT 2 // Vertical border used for Wiener +#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 + +// How many border pixels do we need for each processing unit? +#define RESTORATION_BORDER 3 + +// How many rows of deblocked pixels do we save above/below each processing +// stripe? +#define RESTORATION_CTX_VERT 2 + +// 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 + +// 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_UNITSIZE_MAX 256 +#define RESTORATION_UNITPELS_HORZ_MAX \ + (RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_HORZ + 16) +#define RESTORATION_UNITPELS_VERT_MAX \ + ((RESTORATION_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_BORDER_VERT + \ + RESTORATION_UNIT_OFFSET)) +#define RESTORATION_UNITPELS_MAX \ + (RESTORATION_UNITPELS_HORZ_MAX * RESTORATION_UNITPELS_VERT_MAX) + +// 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_UNITPELS_MAX * 2 * sizeof(int32_t)) + +#define SGRPROJ_EXTBUF_SIZE (0) +#define SGRPROJ_PARAMS_BITS 4 +#define SGRPROJ_PARAMS (1 << SGRPROJ_PARAMS_BITS) + +// 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) + +#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) + +#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_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_WIN2_CHROMA ((WIENER_WIN_CHROMA) * (WIENER_WIN_CHROMA)) + +#define WIENER_FILT_PREC_BITS 7 +#define WIENER_FILT_STEP (1 << WIENER_FILT_PREC_BITS) + +// 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 + +#define LR_TILE_ROW 0 +#define LR_TILE_COL 0 +#define LR_TILE_COLS 1 + +typedef struct { + int r[2]; // radii + int s[2]; // sgr parameters for r[0] and r[1], based on GenSgrprojVtable() +} sgr_params_type; + +typedef struct { + RestorationType restoration_type; + WienerInfo wiener_info; + SgrprojInfo sgrproj_info; +} RestorationUnitInfo; + +// 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_UNITSIZE_MAX * 3 / 2 + 2 * RESTORATION_EXTRA_HORZ) + +// Similarly, the column buffers (used when we're at a vertical tile edge +// that we can't filter across) need space for one processing unit's worth +// of pixels, plus the top/bottom border width +#define RESTORATION_COLBUFFER_HEIGHT \ + (RESTORATION_PROC_UNIT_SIZE + 2 * RESTORATION_BORDER) + +typedef struct { + // Temporary buffers to save/restore 3 lines above/below the restoration + // stripe. + uint16_t tmp_save_above[RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH]; + uint16_t tmp_save_below[RESTORATION_BORDER][RESTORATION_LINEBUFFER_WIDTH]; +} RestorationLineBuffers; + +typedef struct { + uint8_t *stripe_boundary_above; + uint8_t *stripe_boundary_below; + int stripe_boundary_stride; + int stripe_boundary_size; +} RestorationStripeBoundaries; + +typedef struct { + RestorationType frame_restoration_type; + int restoration_unit_size; + + // 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; + RestorationStripeBoundaries boundaries; + int optimized_lr; +} 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; + +typedef void (*rest_unit_visitor_t)(const RestorationTileLimits *limits, + const AV1PixelRect *tile_rect, + int rest_unit_idx, void *priv, + int32_t *tmpbuf, + RestorationLineBuffers *rlbs); + +typedef struct FilterFrameCtxt { + const RestorationInfo *rsi; + int tile_stripe0; + int ss_x, ss_y; + int highbd, bit_depth; + uint8_t *data8, *dst8; + int data_stride, dst_stride; + AV1PixelRect tile_rect; +} FilterFrameCtxt; + +typedef struct AV1LrStruct { + rest_unit_visitor_t on_rest_unit; + FilterFrameCtxt ctxt[MAX_MB_PLANE]; + YV12_BUFFER_CONFIG *frame; + YV12_BUFFER_CONFIG *dst; +} AV1LrStruct; + +extern const sgr_params_type sgr_params[SGRPROJ_PARAMS]; +extern int sgrproj_mtable[SGRPROJ_PARAMS][2]; +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, const sgr_params_type *params); + +// 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. tile_rect gives the limits of the tile containing +// this unit. tile_stripe0 is the index of the first stripe in this tile. +// +// ss_x and ss_y are flags which should be 1 if this is a plane with +// horizontal/vertical subsampling, respectively. 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, + const RestorationStripeBoundaries *rsb, RestorationLineBuffers *rlbs, + const AV1PixelRect *tile_rect, int tile_stripe0, int ss_x, int ss_y, + int highbd, int bit_depth, uint8_t *data8, int stride, uint8_t *dst8, + int dst_stride, int32_t *tmpbuf, int optimized_lr); + +void av1_loop_restoration_filter_frame(YV12_BUFFER_CONFIG *frame, + struct AV1Common *cm, int optimized_lr, + void *lr_ctxt); +void av1_loop_restoration_precal(); + +typedef void (*rest_tile_start_visitor_t)(int tile_row, int tile_col, + void *priv); +struct AV1LrSyncData; + +typedef void (*sync_read_fn_t)(void *const lr_sync, int r, int c, int plane); + +typedef void (*sync_write_fn_t)(void *const lr_sync, int r, int c, + const int sb_cols, int plane); + +// Call on_rest_unit for each loop restoration unit in the plane. +void av1_foreach_rest_unit_in_plane(const struct AV1Common *cm, int plane, + rest_unit_visitor_t on_rest_unit, + void *priv, AV1PixelRect *tile_rect, + int32_t *tmpbuf, + RestorationLineBuffers *rlbs); + +// 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 unit. +// +// 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); + +void av1_loop_restoration_save_boundary_lines(const YV12_BUFFER_CONFIG *frame, + struct AV1Common *cm, + int after_cdef); +void av1_loop_restoration_filter_frame_init(AV1LrStruct *lr_ctxt, + YV12_BUFFER_CONFIG *frame, + struct AV1Common *cm, + int optimized_lr, int num_planes); +void av1_loop_restoration_copy_planes(AV1LrStruct *loop_rest_ctxt, + struct AV1Common *cm, int num_planes); +void av1_foreach_rest_unit_in_row( + RestorationTileLimits *limits, const AV1PixelRect *tile_rect, + rest_unit_visitor_t on_rest_unit, int row_number, int unit_size, + int unit_idx0, int hunits_per_tile, int vunits_per_tile, int plane, + void *priv, int32_t *tmpbuf, RestorationLineBuffers *rlbs, + sync_read_fn_t on_sync_read, sync_write_fn_t on_sync_write, + struct AV1LrSyncData *const lr_sync); +AV1PixelRect av1_whole_frame_rect(const struct AV1Common *cm, int is_uv); +int av1_lr_count_units_in_tile(int unit_size, int tile_size); +void av1_lr_sync_read_dummy(void *const lr_sync, int r, int c, int plane); +void av1_lr_sync_write_dummy(void *const lr_sync, int r, int c, + const int sb_cols, int plane); +#ifdef __cplusplus +} // extern "C" +#endif + +#endif // AOM_AV1_COMMON_RESTORATION_H_ |