Line data Source code
1 : /*
2 : * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3 : *
4 : * Use of this source code is governed by a BSD-style license
5 : * that can be found in the LICENSE file in the root of the source
6 : * tree. An additional intellectual property rights grant can be found
7 : * in the file PATENTS. All contributing project authors may
8 : * be found in the AUTHORS file in the root of the source tree.
9 : */
10 :
11 : #include <math.h>
12 :
13 : #include "vpx_ports/mem.h"
14 : #include "vpx_ports/system_state.h"
15 :
16 : #include "vp9/encoder/vp9_aq_variance.h"
17 :
18 : #include "vp9/common/vp9_seg_common.h"
19 :
20 : #include "vp9/encoder/vp9_ratectrl.h"
21 : #include "vp9/encoder/vp9_rd.h"
22 : #include "vp9/encoder/vp9_segmentation.h"
23 :
24 : #define ENERGY_MIN (-4)
25 : #define ENERGY_MAX (1)
26 : #define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN + 1)
27 : #define ENERGY_IN_BOUNDS(energy) \
28 : assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX)
29 :
30 : static const double rate_ratio[MAX_SEGMENTS] = { 2.5, 2.0, 1.5, 1.0,
31 : 0.75, 1.0, 1.0, 1.0 };
32 : static const int segment_id[ENERGY_SPAN] = { 0, 1, 1, 2, 3, 4 };
33 :
34 : #define SEGMENT_ID(i) segment_id[(i)-ENERGY_MIN]
35 :
36 : DECLARE_ALIGNED(16, static const uint8_t, vp9_64_zeros[64]) = { 0 };
37 : #if CONFIG_VP9_HIGHBITDEPTH
38 : DECLARE_ALIGNED(16, static const uint16_t, vp9_highbd_64_zeros[64]) = { 0 };
39 : #endif
40 :
41 0 : unsigned int vp9_vaq_segment_id(int energy) {
42 0 : ENERGY_IN_BOUNDS(energy);
43 0 : return SEGMENT_ID(energy);
44 : }
45 :
46 0 : void vp9_vaq_frame_setup(VP9_COMP *cpi) {
47 0 : VP9_COMMON *cm = &cpi->common;
48 0 : struct segmentation *seg = &cm->seg;
49 : int i;
50 :
51 0 : if (frame_is_intra_only(cm) || cm->error_resilient_mode ||
52 0 : cpi->refresh_alt_ref_frame || cpi->force_update_segmentation ||
53 0 : (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
54 0 : vp9_enable_segmentation(seg);
55 0 : vp9_clearall_segfeatures(seg);
56 :
57 0 : seg->abs_delta = SEGMENT_DELTADATA;
58 :
59 0 : vpx_clear_system_state();
60 :
61 0 : for (i = 0; i < MAX_SEGMENTS; ++i) {
62 0 : int qindex_delta =
63 0 : vp9_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex,
64 : rate_ratio[i], cm->bit_depth);
65 :
66 : // We don't allow qindex 0 in a segment if the base value is not 0.
67 : // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment
68 : // Q delta is sometimes applied without going back around the rd loop.
69 : // This could lead to an illegal combination of partition size and q.
70 0 : if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) {
71 0 : qindex_delta = -cm->base_qindex + 1;
72 : }
73 :
74 : // No need to enable SEG_LVL_ALT_Q for this segment.
75 0 : if (rate_ratio[i] == 1.0) {
76 0 : continue;
77 : }
78 :
79 0 : vp9_set_segdata(seg, i, SEG_LVL_ALT_Q, qindex_delta);
80 0 : vp9_enable_segfeature(seg, i, SEG_LVL_ALT_Q);
81 : }
82 : }
83 0 : }
84 :
85 : /* TODO(agrange, paulwilkins): The block_variance calls the unoptimized versions
86 : * of variance() and highbd_8_variance(). It should not.
87 : */
88 0 : static void aq_variance(const uint8_t *a, int a_stride, const uint8_t *b,
89 : int b_stride, int w, int h, unsigned int *sse,
90 : int *sum) {
91 : int i, j;
92 :
93 0 : *sum = 0;
94 0 : *sse = 0;
95 :
96 0 : for (i = 0; i < h; i++) {
97 0 : for (j = 0; j < w; j++) {
98 0 : const int diff = a[j] - b[j];
99 0 : *sum += diff;
100 0 : *sse += diff * diff;
101 : }
102 :
103 0 : a += a_stride;
104 0 : b += b_stride;
105 : }
106 0 : }
107 :
108 : #if CONFIG_VP9_HIGHBITDEPTH
109 : static void aq_highbd_variance64(const uint8_t *a8, int a_stride,
110 : const uint8_t *b8, int b_stride, int w, int h,
111 : uint64_t *sse, uint64_t *sum) {
112 : int i, j;
113 :
114 : uint16_t *a = CONVERT_TO_SHORTPTR(a8);
115 : uint16_t *b = CONVERT_TO_SHORTPTR(b8);
116 : *sum = 0;
117 : *sse = 0;
118 :
119 : for (i = 0; i < h; i++) {
120 : for (j = 0; j < w; j++) {
121 : const int diff = a[j] - b[j];
122 : *sum += diff;
123 : *sse += diff * diff;
124 : }
125 : a += a_stride;
126 : b += b_stride;
127 : }
128 : }
129 :
130 : static void aq_highbd_8_variance(const uint8_t *a8, int a_stride,
131 : const uint8_t *b8, int b_stride, int w, int h,
132 : unsigned int *sse, int *sum) {
133 : uint64_t sse_long = 0;
134 : uint64_t sum_long = 0;
135 : aq_highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long);
136 : *sse = (unsigned int)sse_long;
137 : *sum = (int)sum_long;
138 : }
139 : #endif // CONFIG_VP9_HIGHBITDEPTH
140 :
141 0 : static unsigned int block_variance(VP9_COMP *cpi, MACROBLOCK *x,
142 : BLOCK_SIZE bs) {
143 0 : MACROBLOCKD *xd = &x->e_mbd;
144 : unsigned int var, sse;
145 0 : int right_overflow =
146 0 : (xd->mb_to_right_edge < 0) ? ((-xd->mb_to_right_edge) >> 3) : 0;
147 0 : int bottom_overflow =
148 0 : (xd->mb_to_bottom_edge < 0) ? ((-xd->mb_to_bottom_edge) >> 3) : 0;
149 :
150 0 : if (right_overflow || bottom_overflow) {
151 0 : const int bw = 8 * num_8x8_blocks_wide_lookup[bs] - right_overflow;
152 0 : const int bh = 8 * num_8x8_blocks_high_lookup[bs] - bottom_overflow;
153 : int avg;
154 : #if CONFIG_VP9_HIGHBITDEPTH
155 : if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
156 : aq_highbd_8_variance(x->plane[0].src.buf, x->plane[0].src.stride,
157 : CONVERT_TO_BYTEPTR(vp9_highbd_64_zeros), 0, bw, bh,
158 : &sse, &avg);
159 : sse >>= 2 * (xd->bd - 8);
160 : avg >>= (xd->bd - 8);
161 : } else {
162 : aq_variance(x->plane[0].src.buf, x->plane[0].src.stride, vp9_64_zeros, 0,
163 : bw, bh, &sse, &avg);
164 : }
165 : #else
166 0 : aq_variance(x->plane[0].src.buf, x->plane[0].src.stride, vp9_64_zeros, 0,
167 : bw, bh, &sse, &avg);
168 : #endif // CONFIG_VP9_HIGHBITDEPTH
169 0 : var = sse - (unsigned int)(((int64_t)avg * avg) / (bw * bh));
170 0 : return (unsigned int)(((uint64_t)256 * var) / (bw * bh));
171 : } else {
172 : #if CONFIG_VP9_HIGHBITDEPTH
173 : if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
174 : var =
175 : cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride,
176 : CONVERT_TO_BYTEPTR(vp9_highbd_64_zeros), 0, &sse);
177 : } else {
178 : var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride,
179 : vp9_64_zeros, 0, &sse);
180 : }
181 : #else
182 0 : var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride,
183 : vp9_64_zeros, 0, &sse);
184 : #endif // CONFIG_VP9_HIGHBITDEPTH
185 0 : return (unsigned int)(((uint64_t)256 * var) >> num_pels_log2_lookup[bs]);
186 : }
187 : }
188 :
189 0 : double vp9_log_block_var(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
190 0 : unsigned int var = block_variance(cpi, x, bs);
191 0 : vpx_clear_system_state();
192 0 : return log(var + 1.0);
193 : }
194 :
195 : #define DEFAULT_E_MIDPOINT 10.0
196 0 : int vp9_block_energy(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
197 : double energy;
198 : double energy_midpoint;
199 0 : vpx_clear_system_state();
200 0 : energy_midpoint =
201 0 : (cpi->oxcf.pass == 2) ? cpi->twopass.mb_av_energy : DEFAULT_E_MIDPOINT;
202 0 : energy = vp9_log_block_var(cpi, x, bs) - energy_midpoint;
203 0 : return clamp((int)round(energy), ENERGY_MIN, ENERGY_MAX);
204 : }
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