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https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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263 lines
9.7 KiB
C
263 lines
9.7 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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#include <assert.h>
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#include <limits.h>
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#include "config/aom_scale_rtcd.h"
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#include "aom_dsp/aom_dsp_common.h"
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#include "aom_dsp/psnr.h"
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#include "aom_mem/aom_mem.h"
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#include "aom_ports/mem.h"
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#include "av1/common/av1_loopfilter.h"
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#include "av1/common/onyxc_int.h"
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#include "av1/common/quant_common.h"
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#include "av1/encoder/av1_quantize.h"
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#include "av1/encoder/encoder.h"
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#include "av1/encoder/picklpf.h"
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static void yv12_copy_plane(const YV12_BUFFER_CONFIG *src_bc,
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YV12_BUFFER_CONFIG *dst_bc, int plane) {
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switch (plane) {
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case 0: aom_yv12_copy_y(src_bc, dst_bc); break;
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case 1: aom_yv12_copy_u(src_bc, dst_bc); break;
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case 2: aom_yv12_copy_v(src_bc, dst_bc); break;
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default: assert(plane >= 0 && plane <= 2); break;
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}
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}
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int av1_get_max_filter_level(const AV1_COMP *cpi) {
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if (cpi->oxcf.pass == 2) {
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return cpi->twopass.section_intra_rating > 8 ? MAX_LOOP_FILTER * 3 / 4
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: MAX_LOOP_FILTER;
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} else {
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return MAX_LOOP_FILTER;
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}
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}
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static int64_t try_filter_frame(const YV12_BUFFER_CONFIG *sd,
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AV1_COMP *const cpi, int filt_level,
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int partial_frame, int plane, int dir) {
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AV1_COMMON *const cm = &cpi->common;
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int64_t filt_err;
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assert(plane >= 0 && plane <= 2);
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int filter_level[2] = { filt_level, filt_level };
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if (plane == 0 && dir == 0) filter_level[1] = cm->lf.filter_level[1];
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if (plane == 0 && dir == 1) filter_level[0] = cm->lf.filter_level[0];
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// set base filters for use of get_filter_level when in DELTA_Q_LF mode
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switch (plane) {
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case 0:
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cm->lf.filter_level[0] = filter_level[0];
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cm->lf.filter_level[1] = filter_level[1];
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break;
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case 1: cm->lf.filter_level_u = filter_level[0]; break;
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case 2: cm->lf.filter_level_v = filter_level[0]; break;
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}
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// TODO(any): please enable multi-thread and remove the flag when loop
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// filter mask is compatible with multi-thread.
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#if LOOP_FILTER_BITMASK
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av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, 0, plane,
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plane + 1, partial_frame);
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#else
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if (cpi->num_workers > 1)
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av1_loop_filter_frame_mt(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, plane,
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plane + 1, partial_frame, cpi->workers,
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cpi->num_workers, &cpi->lf_row_sync);
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else
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av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, plane,
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plane + 1, partial_frame);
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#endif
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filt_err = aom_get_sse_plane(sd, cm->frame_to_show, plane,
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cm->seq_params.use_highbitdepth);
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// Re-instate the unfiltered frame
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yv12_copy_plane(&cpi->last_frame_uf, cm->frame_to_show, plane);
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return filt_err;
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}
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static int search_filter_level(const YV12_BUFFER_CONFIG *sd, AV1_COMP *cpi,
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int partial_frame,
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const int *last_frame_filter_level,
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double *best_cost_ret, int plane, int dir) {
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const AV1_COMMON *const cm = &cpi->common;
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const int min_filter_level = 0;
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const int max_filter_level = av1_get_max_filter_level(cpi);
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int filt_direction = 0;
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int64_t best_err;
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int filt_best;
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MACROBLOCK *x = &cpi->td.mb;
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// Start the search at the previous frame filter level unless it is now out of
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// range.
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int lvl;
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switch (plane) {
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case 0: lvl = last_frame_filter_level[dir]; break;
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case 1: lvl = last_frame_filter_level[2]; break;
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case 2: lvl = last_frame_filter_level[3]; break;
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default: assert(plane >= 0 && plane <= 2); return 0;
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}
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int filt_mid = clamp(lvl, min_filter_level, max_filter_level);
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int filter_step = filt_mid < 16 ? 4 : filt_mid / 4;
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// Sum squared error at each filter level
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int64_t ss_err[MAX_LOOP_FILTER + 1];
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// Set each entry to -1
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memset(ss_err, 0xFF, sizeof(ss_err));
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yv12_copy_plane(cm->frame_to_show, &cpi->last_frame_uf, plane);
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best_err = try_filter_frame(sd, cpi, filt_mid, partial_frame, plane, dir);
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filt_best = filt_mid;
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ss_err[filt_mid] = best_err;
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while (filter_step > 0) {
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const int filt_high = AOMMIN(filt_mid + filter_step, max_filter_level);
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const int filt_low = AOMMAX(filt_mid - filter_step, min_filter_level);
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// Bias against raising loop filter in favor of lowering it.
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int64_t bias = (best_err >> (15 - (filt_mid / 8))) * filter_step;
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if ((cpi->oxcf.pass == 2) && (cpi->twopass.section_intra_rating < 20))
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bias = (bias * cpi->twopass.section_intra_rating) / 20;
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// yx, bias less for large block size
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if (cm->tx_mode != ONLY_4X4) bias >>= 1;
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if (filt_direction <= 0 && filt_low != filt_mid) {
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// Get Low filter error score
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if (ss_err[filt_low] < 0) {
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ss_err[filt_low] =
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try_filter_frame(sd, cpi, filt_low, partial_frame, plane, dir);
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}
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// If value is close to the best so far then bias towards a lower loop
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// filter value.
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if (ss_err[filt_low] < (best_err + bias)) {
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// Was it actually better than the previous best?
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if (ss_err[filt_low] < best_err) {
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best_err = ss_err[filt_low];
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}
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filt_best = filt_low;
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}
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}
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// Now look at filt_high
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if (filt_direction >= 0 && filt_high != filt_mid) {
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if (ss_err[filt_high] < 0) {
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ss_err[filt_high] =
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try_filter_frame(sd, cpi, filt_high, partial_frame, plane, dir);
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}
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// If value is significantly better than previous best, bias added against
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// raising filter value
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if (ss_err[filt_high] < (best_err - bias)) {
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best_err = ss_err[filt_high];
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filt_best = filt_high;
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}
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}
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// Half the step distance if the best filter value was the same as last time
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if (filt_best == filt_mid) {
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filter_step /= 2;
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filt_direction = 0;
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} else {
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filt_direction = (filt_best < filt_mid) ? -1 : 1;
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filt_mid = filt_best;
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}
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}
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// Update best error
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best_err = ss_err[filt_best];
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if (best_cost_ret) *best_cost_ret = RDCOST_DBL(x->rdmult, 0, best_err);
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return filt_best;
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}
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void av1_pick_filter_level(const YV12_BUFFER_CONFIG *sd, AV1_COMP *cpi,
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LPF_PICK_METHOD method) {
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AV1_COMMON *const cm = &cpi->common;
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const int num_planes = av1_num_planes(cm);
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struct loopfilter *const lf = &cm->lf;
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(void)sd;
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lf->sharpness_level = 0;
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cpi->td.mb.rdmult = cpi->rd.RDMULT;
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if (method == LPF_PICK_MINIMAL_LPF) {
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lf->filter_level[0] = 0;
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lf->filter_level[1] = 0;
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} else if (method >= LPF_PICK_FROM_Q) {
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const int min_filter_level = 0;
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const int max_filter_level = av1_get_max_filter_level(cpi);
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const int q = av1_ac_quant_Q3(cm->base_qindex, 0, cm->seq_params.bit_depth);
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// These values were determined by linear fitting the result of the
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// searched level for 8 bit depth:
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// Keyframes: filt_guess = q * 0.06699 - 1.60817
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// Other frames: filt_guess = q * 0.02295 + 2.48225
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//
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// And high bit depth separately:
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// filt_guess = q * 0.316206 + 3.87252
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int filt_guess;
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switch (cm->seq_params.bit_depth) {
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case AOM_BITS_8:
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filt_guess = (cm->frame_type == KEY_FRAME)
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? ROUND_POWER_OF_TWO(q * 17563 - 421574, 18)
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: ROUND_POWER_OF_TWO(q * 6017 + 650707, 18);
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break;
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case AOM_BITS_10:
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filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 4060632, 20);
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break;
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case AOM_BITS_12:
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filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 16242526, 22);
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break;
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default:
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assert(0 &&
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"bit_depth should be AOM_BITS_8, AOM_BITS_10 "
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"or AOM_BITS_12");
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return;
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}
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if (cm->seq_params.bit_depth != AOM_BITS_8 && cm->frame_type == KEY_FRAME)
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filt_guess -= 4;
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// TODO(chengchen): retrain the model for Y, U, V filter levels
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lf->filter_level[0] = clamp(filt_guess, min_filter_level, max_filter_level);
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lf->filter_level[1] = clamp(filt_guess, min_filter_level, max_filter_level);
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lf->filter_level_u = clamp(filt_guess, min_filter_level, max_filter_level);
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lf->filter_level_v = clamp(filt_guess, min_filter_level, max_filter_level);
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} else {
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const int last_frame_filter_level[4] = { lf->filter_level[0],
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lf->filter_level[1],
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lf->filter_level_u,
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lf->filter_level_v };
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lf->filter_level[0] = lf->filter_level[1] =
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search_filter_level(sd, cpi, method == LPF_PICK_FROM_SUBIMAGE,
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last_frame_filter_level, NULL, 0, 2);
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lf->filter_level[0] =
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search_filter_level(sd, cpi, method == LPF_PICK_FROM_SUBIMAGE,
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last_frame_filter_level, NULL, 0, 0);
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lf->filter_level[1] =
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search_filter_level(sd, cpi, method == LPF_PICK_FROM_SUBIMAGE,
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last_frame_filter_level, NULL, 0, 1);
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if (num_planes > 1) {
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lf->filter_level_u =
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search_filter_level(sd, cpi, method == LPF_PICK_FROM_SUBIMAGE,
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last_frame_filter_level, NULL, 1, 0);
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lf->filter_level_v =
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search_filter_level(sd, cpi, method == LPF_PICK_FROM_SUBIMAGE,
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last_frame_filter_level, NULL, 2, 0);
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}
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}
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}
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