2014-03-27 00:05:45 +01:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
|
|
|
|
*
|
|
|
|
* Use of this source code is governed by a BSD-style license
|
|
|
|
* that can be found in the LICENSE file in the root of the source
|
|
|
|
* tree. An additional intellectual property rights grant can be found
|
|
|
|
* in the file PATENTS. All contributing project authors may
|
|
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <limits.h>
|
|
|
|
#include <math.h>
|
2015-08-31 23:36:35 +02:00
|
|
|
#include "vpx_dsp/vpx_dsp_common.h"
|
2015-08-10 20:28:04 +02:00
|
|
|
#include "vpx_ports/system_state.h"
|
2014-03-27 00:05:45 +01:00
|
|
|
|
2015-05-15 05:21:01 +02:00
|
|
|
#include "vp9/encoder/vp9_aq_complexity.h"
|
2014-11-07 17:32:50 +01:00
|
|
|
#include "vp9/encoder/vp9_aq_variance.h"
|
|
|
|
#include "vp9/encoder/vp9_encodeframe.h"
|
2014-03-27 00:05:45 +01:00
|
|
|
#include "vp9/common/vp9_seg_common.h"
|
|
|
|
#include "vp9/encoder/vp9_segmentation.h"
|
|
|
|
|
2016-07-27 05:43:23 +02:00
|
|
|
#define AQ_C_SEGMENTS 5
|
|
|
|
#define DEFAULT_AQ2_SEG 3 // Neutral Q segment
|
2014-11-27 11:50:56 +01:00
|
|
|
#define AQ_C_STRENGTHS 3
|
2016-07-27 05:43:23 +02:00
|
|
|
static const double aq_c_q_adj_factor[AQ_C_STRENGTHS][AQ_C_SEGMENTS] = {
|
|
|
|
{ 1.75, 1.25, 1.05, 1.00, 0.90 },
|
|
|
|
{ 2.00, 1.50, 1.15, 1.00, 0.85 },
|
|
|
|
{ 2.50, 1.75, 1.25, 1.00, 0.80 }
|
|
|
|
};
|
|
|
|
static const double aq_c_transitions[AQ_C_STRENGTHS][AQ_C_SEGMENTS] = {
|
|
|
|
{ 0.15, 0.30, 0.55, 2.00, 100.0 },
|
|
|
|
{ 0.20, 0.40, 0.65, 2.00, 100.0 },
|
|
|
|
{ 0.25, 0.50, 0.75, 2.00, 100.0 }
|
|
|
|
};
|
|
|
|
static const double aq_c_var_thresholds[AQ_C_STRENGTHS][AQ_C_SEGMENTS] = {
|
|
|
|
{ -4.0, -3.0, -2.0, 100.00, 100.0 },
|
|
|
|
{ -3.5, -2.5, -1.5, 100.00, 100.0 },
|
|
|
|
{ -3.0, -2.0, -1.0, 100.00, 100.0 }
|
|
|
|
};
|
2014-11-27 11:50:56 +01:00
|
|
|
|
2014-09-03 01:34:09 +02:00
|
|
|
static int get_aq_c_strength(int q_index, vpx_bit_depth_t bit_depth) {
|
2014-06-04 15:14:14 +02:00
|
|
|
// Approximate base quatizer (truncated to int)
|
2014-09-03 01:34:09 +02:00
|
|
|
const int base_quant = vp9_ac_quant(q_index, 0, bit_depth) / 4;
|
2014-11-27 11:50:56 +01:00
|
|
|
return (base_quant > 10) + (base_quant > 25);
|
2014-06-04 15:14:14 +02:00
|
|
|
}
|
2014-03-27 00:05:45 +01:00
|
|
|
|
|
|
|
void vp9_setup_in_frame_q_adj(VP9_COMP *cpi) {
|
|
|
|
VP9_COMMON *const cm = &cpi->common;
|
|
|
|
struct segmentation *const seg = &cm->seg;
|
|
|
|
|
|
|
|
// Make SURE use of floating point in this function is safe.
|
2015-08-10 20:28:04 +02:00
|
|
|
vpx_clear_system_state();
|
2014-03-27 00:05:45 +01:00
|
|
|
|
2016-01-14 02:27:17 +01:00
|
|
|
if (frame_is_intra_only(cm) || cm->error_resilient_mode ||
|
2016-07-16 00:38:52 +02:00
|
|
|
cpi->refresh_alt_ref_frame || cpi->force_update_segmentation ||
|
2014-03-27 00:05:45 +01:00
|
|
|
(cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
|
|
|
|
int segment;
|
2014-09-03 01:34:09 +02:00
|
|
|
const int aq_strength = get_aq_c_strength(cm->base_qindex, cm->bit_depth);
|
2014-03-27 00:05:45 +01:00
|
|
|
|
|
|
|
// Clear down the segment map.
|
2015-04-24 05:47:40 +02:00
|
|
|
memset(cpi->segmentation_map, DEFAULT_AQ2_SEG, cm->mi_rows * cm->mi_cols);
|
2014-03-27 00:05:45 +01:00
|
|
|
|
|
|
|
vp9_clearall_segfeatures(seg);
|
|
|
|
|
2014-06-04 15:14:14 +02:00
|
|
|
// Segmentation only makes sense if the target bits per SB is above a
|
|
|
|
// threshold. Below this the overheads will usually outweigh any benefit.
|
|
|
|
if (cpi->rc.sb64_target_rate < 256) {
|
|
|
|
vp9_disable_segmentation(seg);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
vp9_enable_segmentation(seg);
|
|
|
|
|
2014-03-27 00:05:45 +01:00
|
|
|
// Select delta coding method.
|
|
|
|
seg->abs_delta = SEGMENT_DELTADATA;
|
|
|
|
|
2014-11-27 11:50:56 +01:00
|
|
|
// Default segment "Q" feature is disabled so it defaults to the baseline Q.
|
|
|
|
vp9_disable_segfeature(seg, DEFAULT_AQ2_SEG, SEG_LVL_ALT_Q);
|
2014-03-27 00:05:45 +01:00
|
|
|
|
|
|
|
// Use some of the segments for in frame Q adjustment.
|
2014-11-27 11:50:56 +01:00
|
|
|
for (segment = 0; segment < AQ_C_SEGMENTS; ++segment) {
|
|
|
|
int qindex_delta;
|
|
|
|
|
2016-07-27 05:43:23 +02:00
|
|
|
if (segment == DEFAULT_AQ2_SEG) continue;
|
2014-11-27 11:50:56 +01:00
|
|
|
|
2016-07-27 05:43:23 +02:00
|
|
|
qindex_delta = vp9_compute_qdelta_by_rate(
|
|
|
|
&cpi->rc, cm->frame_type, cm->base_qindex,
|
|
|
|
aq_c_q_adj_factor[aq_strength][segment], cm->bit_depth);
|
2014-06-03 14:03:49 +02:00
|
|
|
|
2014-06-04 15:14:14 +02:00
|
|
|
// For AQ complexity mode, we dont allow Q0 in a segment if the base
|
|
|
|
// Q is not 0. Q0 (lossless) implies 4x4 only and in AQ mode 2 a segment
|
|
|
|
// Q delta is sometimes applied without going back around the rd loop.
|
2014-06-03 14:03:49 +02:00
|
|
|
// This could lead to an illegal combination of partition size and q.
|
|
|
|
if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) {
|
|
|
|
qindex_delta = -cm->base_qindex + 1;
|
|
|
|
}
|
|
|
|
if ((cm->base_qindex + qindex_delta) > 0) {
|
|
|
|
vp9_enable_segfeature(seg, segment, SEG_LVL_ALT_Q);
|
|
|
|
vp9_set_segdata(seg, segment, SEG_LVL_ALT_Q, qindex_delta);
|
|
|
|
}
|
2014-03-27 00:05:45 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-11-25 15:54:55 +01:00
|
|
|
#define DEFAULT_LV_THRESH 10.0
|
2014-11-27 11:50:56 +01:00
|
|
|
#define MIN_DEFAULT_LV_THRESH 8.0
|
|
|
|
// Select a segment for the current block.
|
2014-06-04 15:14:14 +02:00
|
|
|
// The choice of segment for a block depends on the ratio of the projected
|
2014-11-27 11:50:56 +01:00
|
|
|
// bits for the block vs a target average and its spatial complexity.
|
|
|
|
void vp9_caq_select_segment(VP9_COMP *cpi, MACROBLOCK *mb, BLOCK_SIZE bs,
|
|
|
|
int mi_row, int mi_col, int projected_rate) {
|
2014-03-27 00:05:45 +01:00
|
|
|
VP9_COMMON *const cm = &cpi->common;
|
|
|
|
|
|
|
|
const int mi_offset = mi_row * cm->mi_cols + mi_col;
|
|
|
|
const int bw = num_8x8_blocks_wide_lookup[BLOCK_64X64];
|
|
|
|
const int bh = num_8x8_blocks_high_lookup[BLOCK_64X64];
|
2015-08-18 03:19:22 +02:00
|
|
|
const int xmis = VPXMIN(cm->mi_cols - mi_col, num_8x8_blocks_wide_lookup[bs]);
|
|
|
|
const int ymis = VPXMIN(cm->mi_rows - mi_row, num_8x8_blocks_high_lookup[bs]);
|
2014-03-27 00:05:45 +01:00
|
|
|
int x, y;
|
2014-11-27 11:50:56 +01:00
|
|
|
int i;
|
2014-03-27 00:05:45 +01:00
|
|
|
unsigned char segment;
|
|
|
|
|
2014-11-27 11:50:56 +01:00
|
|
|
if (0) {
|
|
|
|
segment = DEFAULT_AQ2_SEG;
|
2014-03-27 00:05:45 +01:00
|
|
|
} else {
|
|
|
|
// Rate depends on fraction of a SB64 in frame (xmis * ymis / bw * bh).
|
|
|
|
// It is converted to bits * 256 units.
|
2016-07-27 05:43:23 +02:00
|
|
|
const int target_rate =
|
|
|
|
(cpi->rc.sb64_target_rate * xmis * ymis * 256) / (bw * bh);
|
2014-11-07 17:32:50 +01:00
|
|
|
double logvar;
|
2014-11-25 15:54:55 +01:00
|
|
|
double low_var_thresh;
|
2014-11-27 11:50:56 +01:00
|
|
|
const int aq_strength = get_aq_c_strength(cm->base_qindex, cm->bit_depth);
|
2014-11-25 15:54:55 +01:00
|
|
|
|
2015-08-10 20:28:04 +02:00
|
|
|
vpx_clear_system_state();
|
2016-07-27 05:43:23 +02:00
|
|
|
low_var_thresh = (cpi->oxcf.pass == 2) ? VPXMAX(cpi->twopass.mb_av_energy,
|
|
|
|
MIN_DEFAULT_LV_THRESH)
|
|
|
|
: DEFAULT_LV_THRESH;
|
2014-11-07 17:32:50 +01:00
|
|
|
|
2014-11-21 20:11:06 +01:00
|
|
|
vp9_setup_src_planes(mb, cpi->Source, mi_row, mi_col);
|
|
|
|
logvar = vp9_log_block_var(cpi, mb, bs);
|
2014-06-04 15:14:14 +02:00
|
|
|
|
2016-07-27 05:43:23 +02:00
|
|
|
segment = AQ_C_SEGMENTS - 1; // Just in case no break out below.
|
2014-11-27 11:50:56 +01:00
|
|
|
for (i = 0; i < AQ_C_SEGMENTS; ++i) {
|
|
|
|
// Test rate against a threshold value and variance against a threshold.
|
|
|
|
// Increasing segment number (higher variance and complexity) = higher Q.
|
2016-07-27 05:43:23 +02:00
|
|
|
if ((projected_rate < target_rate * aq_c_transitions[aq_strength][i]) &&
|
2014-11-27 11:50:56 +01:00
|
|
|
(logvar < (low_var_thresh + aq_c_var_thresholds[aq_strength][i]))) {
|
|
|
|
segment = i;
|
2014-06-04 15:14:14 +02:00
|
|
|
break;
|
|
|
|
}
|
2014-03-27 00:05:45 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Fill in the entires in the segment map corresponding to this SB64.
|
|
|
|
for (y = 0; y < ymis; y++) {
|
|
|
|
for (x = 0; x < xmis; x++) {
|
|
|
|
cpi->segmentation_map[mi_offset + y * cm->mi_cols + x] = segment;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|