1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
|
/*
* Copyright © 2019, VideoLAN and dav1d authors
* Copyright © 2019, Michail Alvanos
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "src/ppc/dav1d_types.h"
#include "src/ppc/looprestoration.h"
#if BITDEPTH == 8
#define REST_UNIT_STRIDE (400)
static inline i32x4 iclip_vec(i32x4 v, const i32x4 minv, const i32x4 maxv) {
v = vec_max(minv, v);
v = vec_min(maxv, v);
return v;
}
#define APPLY_FILTER_H(v, f, ssum1, ssum2) do { \
i16x8 ktmp_u16_high = (i16x8) u8h_to_u16(v); \
i16x8 ktmp_u16_low = (i16x8) u8l_to_u16(v); \
ssum1 = vec_madd(ktmp_u16_high, f, ssum1); \
ssum2 = vec_madd(ktmp_u16_low, f, ssum2); \
} while (0)
static void wiener_filter_h_vsx(int32_t *hor_ptr,
uint8_t *tmp_ptr,
const int16_t filterh[8],
const int w, const int h)
{
static const i32x4 zerov = vec_splats(0);
static const i32x4 seven_vec = vec_splats(7);
static const i32x4 bitdepth_added_vec = vec_splats(1 << 14);
static const i32x4 round_bits_vec = vec_splats(3);
static const i32x4 rounding_off_vec = vec_splats(1<<2);
static const i32x4 clip_limit_v = vec_splats((1 << 13) - 1);
i16x8 filterhvall = vec_vsx_ld(0, filterh);
i16x8 filterhv0 = vec_splat( filterhvall, 0);
i16x8 filterhv1 = vec_splat( filterhvall, 1);
i16x8 filterhv2 = vec_splat( filterhvall, 2);
i16x8 filterhv3 = vec_splat( filterhvall, 3);
i16x8 filterhv4 = vec_splat( filterhvall, 4);
i16x8 filterhv5 = vec_splat( filterhvall, 5);
i16x8 filterhv6 = vec_splat( filterhvall, 6);
for (int j = 0; j < h + 6; j++) {
for (int i = 0; i < w; i+=16) {
i32x4 sum1 = bitdepth_added_vec;
i32x4 sum2 = bitdepth_added_vec;
i32x4 sum3 = bitdepth_added_vec;
i32x4 sum4 = bitdepth_added_vec;
u8x16 tmp_v0 = vec_ld(0, &tmp_ptr[i]);
u8x16 tmp_v7 = vec_ld(0, &tmp_ptr[i+16]);
u8x16 tmp_v1 = vec_sld( tmp_v7, tmp_v0, 15);
u8x16 tmp_v2 = vec_sld( tmp_v7, tmp_v0, 14);
u8x16 tmp_v3 = vec_sld( tmp_v7, tmp_v0, 13);
u8x16 tmp_v4 = vec_sld( tmp_v7, tmp_v0, 12);
u8x16 tmp_v5 = vec_sld( tmp_v7, tmp_v0, 11);
u8x16 tmp_v6 = vec_sld( tmp_v7, tmp_v0, 10);
u16x8 tmp_u16_high = u8h_to_u16(tmp_v3);
u16x8 tmp_u16_low = u8l_to_u16(tmp_v3);
i32x4 tmp_expanded1 = i16h_to_i32(tmp_u16_high);
i32x4 tmp_expanded2 = i16l_to_i32(tmp_u16_high);
i32x4 tmp_expanded3 = i16h_to_i32(tmp_u16_low);
i32x4 tmp_expanded4 = i16l_to_i32(tmp_u16_low);
i16x8 ssum1 = (i16x8) zerov;
i16x8 ssum2 = (i16x8) zerov;
APPLY_FILTER_H(tmp_v0, filterhv0, ssum1, ssum2);
APPLY_FILTER_H(tmp_v1, filterhv1, ssum1, ssum2);
APPLY_FILTER_H(tmp_v2, filterhv2, ssum1, ssum2);
APPLY_FILTER_H(tmp_v3, filterhv3, ssum1, ssum2);
APPLY_FILTER_H(tmp_v4, filterhv4, ssum1, ssum2);
APPLY_FILTER_H(tmp_v5, filterhv5, ssum1, ssum2);
APPLY_FILTER_H(tmp_v6, filterhv6, ssum1, ssum2);
sum1 += i16h_to_i32(ssum1) + (tmp_expanded1 << seven_vec);
sum2 += i16l_to_i32(ssum1) + (tmp_expanded2 << seven_vec);
sum3 += i16h_to_i32(ssum2) + (tmp_expanded3 << seven_vec);
sum4 += i16l_to_i32(ssum2) + (tmp_expanded4 << seven_vec);
sum1 = (sum1 + rounding_off_vec) >> round_bits_vec;
sum2 = (sum2 + rounding_off_vec) >> round_bits_vec;
sum3 = (sum3 + rounding_off_vec) >> round_bits_vec;
sum4 = (sum4 + rounding_off_vec) >> round_bits_vec;
sum1 = iclip_vec(sum1, zerov, clip_limit_v);
sum2 = iclip_vec(sum2, zerov, clip_limit_v);
sum3 = iclip_vec(sum3, zerov, clip_limit_v);
sum4 = iclip_vec(sum4, zerov, clip_limit_v);
vec_st(sum1, 0, &hor_ptr[i]);
vec_st(sum2, 16, &hor_ptr[i]);
vec_st(sum3, 32, &hor_ptr[i]);
vec_st(sum4, 48, &hor_ptr[i]);
}
tmp_ptr += REST_UNIT_STRIDE;
hor_ptr += REST_UNIT_STRIDE;
}
}
static inline i16x8 iclip_u8_vec(i16x8 v) {
static const i16x8 zerov = vec_splats((int16_t)0);
static const i16x8 maxv = vec_splats((int16_t)255);
v = vec_max(zerov, v);
v = vec_min(maxv, v);
return v;
}
#define APPLY_FILTER_V(index, f) do { \
i32x4 v1 = vec_ld( 0, &hor[(j + index) * REST_UNIT_STRIDE + i]); \
i32x4 v2 = vec_ld(16, &hor[(j + index) * REST_UNIT_STRIDE + i]); \
i32x4 v3 = vec_ld(32, &hor[(j + index) * REST_UNIT_STRIDE + i]); \
i32x4 v4 = vec_ld(48, &hor[(j + index) * REST_UNIT_STRIDE + i]); \
sum1 = sum1 + v1 * f; \
sum2 = sum2 + v2 * f; \
sum3 = sum3 + v3 * f; \
sum4 = sum4 + v4 * f; \
} while (0)
#define LOAD_AND_APPLY_FILTER_V(sumpixelv, hor) do { \
i32x4 sum1 = round_vec; \
i32x4 sum2 = round_vec; \
i32x4 sum3 = round_vec; \
i32x4 sum4 = round_vec; \
APPLY_FILTER_V(0, filterv0); \
APPLY_FILTER_V(1, filterv1); \
APPLY_FILTER_V(2, filterv2); \
APPLY_FILTER_V(3, filterv3); \
APPLY_FILTER_V(4, filterv4); \
APPLY_FILTER_V(5, filterv5); \
APPLY_FILTER_V(6, filterv6); \
sum1 = sum1 >> round_bits_vec; \
sum2 = sum2 >> round_bits_vec; \
sum3 = sum3 >> round_bits_vec; \
sum4 = sum4 >> round_bits_vec; \
i16x8 sum_short_packed_1 = (i16x8) vec_pack(sum1, sum2); \
i16x8 sum_short_packed_2 = (i16x8) vec_pack(sum3, sum4); \
sum_short_packed_1 = iclip_u8_vec(sum_short_packed_1); \
sum_short_packed_2 = iclip_u8_vec(sum_short_packed_2); \
sum_pixel = (u8x16) vec_pack(sum_short_packed_1, sum_short_packed_2); \
} while (0)
static inline void wiener_filter_v_vsx(uint8_t *p,
const ptrdiff_t stride,
const int32_t *hor,
const int16_t filterv[8],
const int w, const int h)
{
static const i32x4 round_bits_vec = vec_splats(11);
static const i32x4 round_vec = vec_splats((1 << 10) - (1 << 18));
i32x4 filterv0 = vec_splats((int32_t) filterv[0]);
i32x4 filterv1 = vec_splats((int32_t) filterv[1]);
i32x4 filterv2 = vec_splats((int32_t) filterv[2]);
i32x4 filterv3 = vec_splats((int32_t) filterv[3]);
i32x4 filterv4 = vec_splats((int32_t) filterv[4]);
i32x4 filterv5 = vec_splats((int32_t) filterv[5]);
i32x4 filterv6 = vec_splats((int32_t) filterv[6]);
for (int j = 0; j < h; j++) {
for (int i = 0; i <(w-w%16); i += 16) {
u8x16 sum_pixel;
LOAD_AND_APPLY_FILTER_V(sum_pixel, hor);
vec_vsx_st(sum_pixel, 0, &p[j * PXSTRIDE(stride) + i]);
}
// remaining loop
if (w & 0xf){
int i=w-w%16;
ALIGN_STK_16(uint8_t, tmp_out, 16,);
u8x16 sum_pixel;
LOAD_AND_APPLY_FILTER_V(sum_pixel, hor);
vec_vsx_st(sum_pixel, 0, tmp_out);
for (int k=0; i<w; i++, k++) {
p[j * PXSTRIDE(stride) + i] = tmp_out[k];
}
}
}
}
static inline void padding(uint8_t *dst, const uint8_t *p,
const ptrdiff_t stride, const uint8_t (*left)[4],
const uint8_t *lpf, int unit_w, const int stripe_h,
const enum LrEdgeFlags edges)
{
const int have_left = !!(edges & LR_HAVE_LEFT);
const int have_right = !!(edges & LR_HAVE_RIGHT);
// Copy more pixels if we don't have to pad them
unit_w += 3 * have_left + 3 * have_right;
uint8_t *dst_l = dst + 3 * !have_left;
p -= 3 * have_left;
lpf -= 3 * have_left;
if (edges & LR_HAVE_TOP) {
// Copy previous loop filtered rows
const uint8_t *const above_1 = lpf;
const uint8_t *const above_2 = above_1 + PXSTRIDE(stride);
pixel_copy(dst_l, above_1, unit_w);
pixel_copy(dst_l + REST_UNIT_STRIDE, above_1, unit_w);
pixel_copy(dst_l + 2 * REST_UNIT_STRIDE, above_2, unit_w);
} else {
// Pad with first row
pixel_copy(dst_l, p, unit_w);
pixel_copy(dst_l + REST_UNIT_STRIDE, p, unit_w);
pixel_copy(dst_l + 2 * REST_UNIT_STRIDE, p, unit_w);
if (have_left) {
pixel_copy(dst_l, &left[0][1], 3);
pixel_copy(dst_l + REST_UNIT_STRIDE, &left[0][1], 3);
pixel_copy(dst_l + 2 * REST_UNIT_STRIDE, &left[0][1], 3);
}
}
uint8_t *dst_tl = dst_l + 3 * REST_UNIT_STRIDE;
if (edges & LR_HAVE_BOTTOM) {
// Copy next loop filtered rows
const uint8_t *const below_1 = lpf + 6 * PXSTRIDE(stride);
const uint8_t *const below_2 = below_1 + PXSTRIDE(stride);
pixel_copy(dst_tl + stripe_h * REST_UNIT_STRIDE, below_1, unit_w);
pixel_copy(dst_tl + (stripe_h + 1) * REST_UNIT_STRIDE, below_2, unit_w);
pixel_copy(dst_tl + (stripe_h + 2) * REST_UNIT_STRIDE, below_2, unit_w);
} else {
// Pad with last row
const uint8_t *const src = p + (stripe_h - 1) * PXSTRIDE(stride);
pixel_copy(dst_tl + stripe_h * REST_UNIT_STRIDE, src, unit_w);
pixel_copy(dst_tl + (stripe_h + 1) * REST_UNIT_STRIDE, src, unit_w);
pixel_copy(dst_tl + (stripe_h + 2) * REST_UNIT_STRIDE, src, unit_w);
if (have_left) {
pixel_copy(dst_tl + stripe_h * REST_UNIT_STRIDE, &left[stripe_h - 1][1], 3);
pixel_copy(dst_tl + (stripe_h + 1) * REST_UNIT_STRIDE, &left[stripe_h - 1][1], 3);
pixel_copy(dst_tl + (stripe_h + 2) * REST_UNIT_STRIDE, &left[stripe_h - 1][1], 3);
}
}
// Inner UNIT_WxSTRIPE_H
for (int j = 0; j < stripe_h; j++) {
pixel_copy(dst_tl + 3 * have_left, p + 3 * have_left, unit_w - 3 * have_left);
dst_tl += REST_UNIT_STRIDE;
p += PXSTRIDE(stride);
}
if (!have_right) {
uint8_t *pad = dst_l + unit_w;
uint8_t *row_last = &dst_l[unit_w - 1];
// Pad 3x(STRIPE_H+6) with last column
for (int j = 0; j < stripe_h + 6; j++) {
pixel_set(pad, *row_last, 3);
pad += REST_UNIT_STRIDE;
row_last += REST_UNIT_STRIDE;
}
}
if (!have_left) {
// Pad 3x(STRIPE_H+6) with first column
for (int j = 0; j < stripe_h + 6; j++) {
pixel_set(dst, *dst_l, 3);
dst += REST_UNIT_STRIDE;
dst_l += REST_UNIT_STRIDE;
}
} else {
dst += 3 * REST_UNIT_STRIDE;
for (int j = 0; j < stripe_h; j++) {
pixel_copy(dst, &left[j][1], 3);
dst += REST_UNIT_STRIDE;
}
}
}
// FIXME Could split into luma and chroma specific functions,
// (since first and last tops are always 0 for chroma)
// FIXME Could implement a version that requires less temporary memory
// (should be possible to implement with only 6 rows of temp storage)
void dav1d_wiener_filter_vsx(uint8_t *p, const ptrdiff_t stride,
const uint8_t (*const left)[4],
const uint8_t *lpf,
const int w, const int h,
const LooprestorationParams *const params,
const enum LrEdgeFlags edges HIGHBD_DECL_SUFFIX)
{
const int16_t (*const filter)[8] = params->filter;
// Wiener filtering is applied to a maximum stripe height of 64 + 3 pixels
// of padding above and below
ALIGN_STK_16(uint8_t, tmp, 70 /*(64 + 3 + 3)*/ * REST_UNIT_STRIDE,);
padding(tmp, p, stride, left, lpf, w, h, edges);
ALIGN_STK_16(int32_t, hor, 70 /*(64 + 3 + 3)*/ * REST_UNIT_STRIDE + 64,);
wiener_filter_h_vsx(hor, tmp, filter[0], w, h);
wiener_filter_v_vsx(p, stride, hor, filter[1], w, h);
}
#endif
|
