1 /*
2 * Copyright (c) 2010 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 #include <stdlib.h>
13 #include <stdio.h>
14
15 #include "./vpx_dsp_rtcd.h"
16 #include "./vpx_config.h"
17 #include "./vpx_scale_rtcd.h"
18 #include "./vp9_rtcd.h"
19
20 #include "vpx_dsp/vpx_dsp_common.h"
21 #include "vpx_dsp/postproc.h"
22 #include "vpx_ports/mem.h"
23 #include "vpx_ports/system_state.h"
24 #include "vpx_scale/vpx_scale.h"
25 #include "vpx_scale/yv12config.h"
26
27 #include "vp9/common/vp9_onyxc_int.h"
28 #include "vp9/common/vp9_postproc.h"
29
30 #if CONFIG_VP9_POSTPROC
31
32 static const uint8_t q_diff_thresh = 20;
33 static const uint8_t last_q_thresh = 170;
34 extern const int16_t vpx_rv[];
35
36 #if CONFIG_VP9_HIGHBITDEPTH
37 static const int16_t kernel5[] = { 1, 1, 4, 1, 1 };
38
vp9_highbd_post_proc_down_and_across_c(const uint16_t * src_ptr,uint16_t * dst_ptr,int src_pixels_per_line,int dst_pixels_per_line,int rows,int cols,int flimit)39 void vp9_highbd_post_proc_down_and_across_c(const uint16_t *src_ptr,
40 uint16_t *dst_ptr,
41 int src_pixels_per_line,
42 int dst_pixels_per_line, int rows,
43 int cols, int flimit) {
44 uint16_t const *p_src;
45 uint16_t *p_dst;
46 int row, col, i, v, kernel;
47 int pitch = src_pixels_per_line;
48 uint16_t d[8];
49
50 for (row = 0; row < rows; row++) {
51 // post_proc_down for one row.
52 p_src = src_ptr;
53 p_dst = dst_ptr;
54
55 for (col = 0; col < cols; col++) {
56 kernel = 4;
57 v = p_src[col];
58
59 for (i = -2; i <= 2; i++) {
60 if (abs(v - p_src[col + i * pitch]) > flimit) goto down_skip_convolve;
61
62 kernel += kernel5[2 + i] * p_src[col + i * pitch];
63 }
64
65 v = (kernel >> 3);
66
67 down_skip_convolve:
68 p_dst[col] = v;
69 }
70
71 /* now post_proc_across */
72 p_src = dst_ptr;
73 p_dst = dst_ptr;
74
75 for (i = 0; i < 8; i++) d[i] = p_src[i];
76
77 for (col = 0; col < cols; col++) {
78 kernel = 4;
79 v = p_src[col];
80
81 d[col & 7] = v;
82
83 for (i = -2; i <= 2; i++) {
84 if (abs(v - p_src[col + i]) > flimit) goto across_skip_convolve;
85
86 kernel += kernel5[2 + i] * p_src[col + i];
87 }
88
89 d[col & 7] = (kernel >> 3);
90
91 across_skip_convolve:
92 if (col >= 2) p_dst[col - 2] = d[(col - 2) & 7];
93 }
94
95 /* handle the last two pixels */
96 p_dst[col - 2] = d[(col - 2) & 7];
97 p_dst[col - 1] = d[(col - 1) & 7];
98
99 /* next row */
100 src_ptr += pitch;
101 dst_ptr += dst_pixels_per_line;
102 }
103 }
104 #endif // CONFIG_VP9_HIGHBITDEPTH
105
q2mbl(int x)106 static int q2mbl(int x) {
107 if (x < 20) x = 20;
108
109 x = 50 + (x - 50) * 10 / 8;
110 return x * x / 3;
111 }
112
113 #if CONFIG_VP9_HIGHBITDEPTH
vp9_highbd_mbpost_proc_across_ip_c(uint16_t * src,int pitch,int rows,int cols,int flimit)114 void vp9_highbd_mbpost_proc_across_ip_c(uint16_t *src, int pitch, int rows,
115 int cols, int flimit) {
116 int r, c, i;
117
118 uint16_t *s = src;
119 uint16_t d[16];
120
121 for (r = 0; r < rows; r++) {
122 int sumsq = 0;
123 int sum = 0;
124
125 for (i = -8; i <= 6; i++) {
126 sumsq += s[i] * s[i];
127 sum += s[i];
128 d[i + 8] = 0;
129 }
130
131 for (c = 0; c < cols + 8; c++) {
132 int x = s[c + 7] - s[c - 8];
133 int y = s[c + 7] + s[c - 8];
134
135 sum += x;
136 sumsq += x * y;
137
138 d[c & 15] = s[c];
139
140 if (sumsq * 15 - sum * sum < flimit) {
141 d[c & 15] = (8 + sum + s[c]) >> 4;
142 }
143
144 s[c - 8] = d[(c - 8) & 15];
145 }
146
147 s += pitch;
148 }
149 }
150 #endif // CONFIG_VP9_HIGHBITDEPTH
151
152 #if CONFIG_VP9_HIGHBITDEPTH
vp9_highbd_mbpost_proc_down_c(uint16_t * dst,int pitch,int rows,int cols,int flimit)153 void vp9_highbd_mbpost_proc_down_c(uint16_t *dst, int pitch, int rows, int cols,
154 int flimit) {
155 int r, c, i;
156 const int16_t *rv3 = &vpx_rv[63 & rand()]; // NOLINT
157
158 for (c = 0; c < cols; c++) {
159 uint16_t *s = &dst[c];
160 int sumsq = 0;
161 int sum = 0;
162 uint16_t d[16];
163 const int16_t *rv2 = rv3 + ((c * 17) & 127);
164
165 for (i = -8; i <= 6; i++) {
166 sumsq += s[i * pitch] * s[i * pitch];
167 sum += s[i * pitch];
168 }
169
170 for (r = 0; r < rows + 8; r++) {
171 sumsq += s[7 * pitch] * s[7 * pitch] - s[-8 * pitch] * s[-8 * pitch];
172 sum += s[7 * pitch] - s[-8 * pitch];
173 d[r & 15] = s[0];
174
175 if (sumsq * 15 - sum * sum < flimit) {
176 d[r & 15] = (rv2[r & 127] + sum + s[0]) >> 4;
177 }
178
179 s[-8 * pitch] = d[(r - 8) & 15];
180 s += pitch;
181 }
182 }
183 }
184 #endif // CONFIG_VP9_HIGHBITDEPTH
185
deblock_and_de_macro_block(YV12_BUFFER_CONFIG * source,YV12_BUFFER_CONFIG * post,int q,int low_var_thresh,int flag,uint8_t * limits)186 static void deblock_and_de_macro_block(YV12_BUFFER_CONFIG *source,
187 YV12_BUFFER_CONFIG *post, int q,
188 int low_var_thresh, int flag,
189 uint8_t *limits) {
190 (void)low_var_thresh;
191 (void)flag;
192 #if CONFIG_VP9_HIGHBITDEPTH
193 if (source->flags & YV12_FLAG_HIGHBITDEPTH) {
194 double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
195 int ppl = (int)(level + .5);
196 vp9_highbd_post_proc_down_and_across(
197 CONVERT_TO_SHORTPTR(source->y_buffer),
198 CONVERT_TO_SHORTPTR(post->y_buffer), source->y_stride, post->y_stride,
199 source->y_height, source->y_width, ppl);
200
201 vp9_highbd_mbpost_proc_across_ip(CONVERT_TO_SHORTPTR(post->y_buffer),
202 post->y_stride, post->y_height,
203 post->y_width, q2mbl(q));
204
205 vp9_highbd_mbpost_proc_down(CONVERT_TO_SHORTPTR(post->y_buffer),
206 post->y_stride, post->y_height, post->y_width,
207 q2mbl(q));
208
209 vp9_highbd_post_proc_down_and_across(
210 CONVERT_TO_SHORTPTR(source->u_buffer),
211 CONVERT_TO_SHORTPTR(post->u_buffer), source->uv_stride, post->uv_stride,
212 source->uv_height, source->uv_width, ppl);
213 vp9_highbd_post_proc_down_and_across(
214 CONVERT_TO_SHORTPTR(source->v_buffer),
215 CONVERT_TO_SHORTPTR(post->v_buffer), source->uv_stride, post->uv_stride,
216 source->uv_height, source->uv_width, ppl);
217 } else {
218 #endif // CONFIG_VP9_HIGHBITDEPTH
219 vp9_deblock(source, post, q, limits);
220 vpx_mbpost_proc_across_ip(post->y_buffer, post->y_stride, post->y_height,
221 post->y_width, q2mbl(q));
222 vpx_mbpost_proc_down(post->y_buffer, post->y_stride, post->y_height,
223 post->y_width, q2mbl(q));
224 #if CONFIG_VP9_HIGHBITDEPTH
225 }
226 #endif // CONFIG_VP9_HIGHBITDEPTH
227 }
228
vp9_deblock(const YV12_BUFFER_CONFIG * src,YV12_BUFFER_CONFIG * dst,int q,uint8_t * limits)229 void vp9_deblock(const YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst, int q,
230 uint8_t *limits) {
231 const int ppl =
232 (int)(6.0e-05 * q * q * q - 0.0067 * q * q + 0.306 * q + 0.0065 + 0.5);
233 #if CONFIG_VP9_HIGHBITDEPTH
234 if (src->flags & YV12_FLAG_HIGHBITDEPTH) {
235 int i;
236 const uint8_t *const srcs[3] = { src->y_buffer, src->u_buffer,
237 src->v_buffer };
238 const int src_strides[3] = { src->y_stride, src->uv_stride,
239 src->uv_stride };
240 const int src_widths[3] = { src->y_width, src->uv_width, src->uv_width };
241 const int src_heights[3] = { src->y_height, src->uv_height,
242 src->uv_height };
243
244 uint8_t *const dsts[3] = { dst->y_buffer, dst->u_buffer, dst->v_buffer };
245 const int dst_strides[3] = { dst->y_stride, dst->uv_stride,
246 dst->uv_stride };
247 for (i = 0; i < MAX_MB_PLANE; ++i) {
248 vp9_highbd_post_proc_down_and_across(
249 CONVERT_TO_SHORTPTR(srcs[i]), CONVERT_TO_SHORTPTR(dsts[i]),
250 src_strides[i], dst_strides[i], src_heights[i], src_widths[i], ppl);
251 }
252 } else {
253 #endif // CONFIG_VP9_HIGHBITDEPTH
254 int mbr;
255 const int mb_rows = src->y_height / 16;
256 const int mb_cols = src->y_width / 16;
257
258 memset(limits, (unsigned char)ppl, 16 * mb_cols);
259
260 for (mbr = 0; mbr < mb_rows; mbr++) {
261 vpx_post_proc_down_and_across_mb_row(
262 src->y_buffer + 16 * mbr * src->y_stride,
263 dst->y_buffer + 16 * mbr * dst->y_stride, src->y_stride,
264 dst->y_stride, src->y_width, limits, 16);
265 vpx_post_proc_down_and_across_mb_row(
266 src->u_buffer + 8 * mbr * src->uv_stride,
267 dst->u_buffer + 8 * mbr * dst->uv_stride, src->uv_stride,
268 dst->uv_stride, src->uv_width, limits, 8);
269 vpx_post_proc_down_and_across_mb_row(
270 src->v_buffer + 8 * mbr * src->uv_stride,
271 dst->v_buffer + 8 * mbr * dst->uv_stride, src->uv_stride,
272 dst->uv_stride, src->uv_width, limits, 8);
273 }
274 #if CONFIG_VP9_HIGHBITDEPTH
275 }
276 #endif // CONFIG_VP9_HIGHBITDEPTH
277 }
278
vp9_denoise(const YV12_BUFFER_CONFIG * src,YV12_BUFFER_CONFIG * dst,int q,uint8_t * limits)279 void vp9_denoise(const YV12_BUFFER_CONFIG *src, YV12_BUFFER_CONFIG *dst, int q,
280 uint8_t *limits) {
281 vp9_deblock(src, dst, q, limits);
282 }
283
swap_mi_and_prev_mi(VP9_COMMON * cm)284 static void swap_mi_and_prev_mi(VP9_COMMON *cm) {
285 // Current mip will be the prev_mip for the next frame.
286 MODE_INFO *temp = cm->postproc_state.prev_mip;
287 cm->postproc_state.prev_mip = cm->mip;
288 cm->mip = temp;
289
290 // Update the upper left visible macroblock ptrs.
291 cm->mi = cm->mip + cm->mi_stride + 1;
292 cm->postproc_state.prev_mi = cm->postproc_state.prev_mip + cm->mi_stride + 1;
293 }
294
vp9_post_proc_frame(struct VP9Common * cm,YV12_BUFFER_CONFIG * dest,vp9_ppflags_t * ppflags,int unscaled_width)295 int vp9_post_proc_frame(struct VP9Common *cm, YV12_BUFFER_CONFIG *dest,
296 vp9_ppflags_t *ppflags, int unscaled_width) {
297 const int q = VPXMIN(105, cm->lf.filter_level * 2);
298 const int flags = ppflags->post_proc_flag;
299 YV12_BUFFER_CONFIG *const ppbuf = &cm->post_proc_buffer;
300 struct postproc_state *const ppstate = &cm->postproc_state;
301
302 if (!cm->frame_to_show) return -1;
303
304 if (!flags) {
305 *dest = *cm->frame_to_show;
306 return 0;
307 }
308
309 vpx_clear_system_state();
310
311 // Alloc memory for prev_mip in the first frame.
312 if (cm->current_video_frame == 1) {
313 ppstate->last_base_qindex = cm->base_qindex;
314 ppstate->last_frame_valid = 1;
315 }
316
317 if ((flags & VP9D_MFQE) && ppstate->prev_mip == NULL) {
318 ppstate->prev_mip = vpx_calloc(cm->mi_alloc_size, sizeof(*cm->mip));
319 if (!ppstate->prev_mip) {
320 return 1;
321 }
322 ppstate->prev_mi = ppstate->prev_mip + cm->mi_stride + 1;
323 }
324
325 // Allocate post_proc_buffer_int if needed.
326 if ((flags & VP9D_MFQE) && !cm->post_proc_buffer_int.buffer_alloc) {
327 if ((flags & VP9D_DEMACROBLOCK) || (flags & VP9D_DEBLOCK)) {
328 const int width = ALIGN_POWER_OF_TWO(cm->width, 4);
329 const int height = ALIGN_POWER_OF_TWO(cm->height, 4);
330
331 if (vpx_alloc_frame_buffer(&cm->post_proc_buffer_int, width, height,
332 cm->subsampling_x, cm->subsampling_y,
333 #if CONFIG_VP9_HIGHBITDEPTH
334 cm->use_highbitdepth,
335 #endif // CONFIG_VP9_HIGHBITDEPTH
336 VP9_ENC_BORDER_IN_PIXELS,
337 cm->byte_alignment) < 0) {
338 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
339 "Failed to allocate MFQE framebuffer");
340 }
341
342 // Ensure that postproc is set to all 0s so that post proc
343 // doesn't pull random data in from edge.
344 memset(cm->post_proc_buffer_int.buffer_alloc, 128,
345 cm->post_proc_buffer.frame_size);
346 }
347 }
348
349 if (vpx_realloc_frame_buffer(&cm->post_proc_buffer, cm->width, cm->height,
350 cm->subsampling_x, cm->subsampling_y,
351 #if CONFIG_VP9_HIGHBITDEPTH
352 cm->use_highbitdepth,
353 #endif
354 VP9_DEC_BORDER_IN_PIXELS, cm->byte_alignment,
355 NULL, NULL, NULL) < 0)
356 vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
357 "Failed to allocate post-processing buffer");
358
359 if (flags & (VP9D_DEMACROBLOCK | VP9D_DEBLOCK)) {
360 if (!cm->postproc_state.limits) {
361 cm->postproc_state.limits =
362 vpx_calloc(unscaled_width, sizeof(*cm->postproc_state.limits));
363 }
364 }
365
366 if (flags & VP9D_ADDNOISE) {
367 if (!cm->postproc_state.generated_noise) {
368 cm->postproc_state.generated_noise = vpx_calloc(
369 cm->width + 256, sizeof(*cm->postproc_state.generated_noise));
370 if (!cm->postproc_state.generated_noise) return 1;
371 }
372 }
373
374 if ((flags & VP9D_MFQE) && cm->current_video_frame >= 2 &&
375 ppstate->last_frame_valid && cm->bit_depth == 8 &&
376 ppstate->last_base_qindex <= last_q_thresh &&
377 cm->base_qindex - ppstate->last_base_qindex >= q_diff_thresh) {
378 vp9_mfqe(cm);
379 // TODO(jackychen): Consider whether enable deblocking by default
380 // if mfqe is enabled. Need to take both the quality and the speed
381 // into consideration.
382 if ((flags & VP9D_DEMACROBLOCK) || (flags & VP9D_DEBLOCK)) {
383 vpx_yv12_copy_frame(ppbuf, &cm->post_proc_buffer_int);
384 }
385 if ((flags & VP9D_DEMACROBLOCK) && cm->post_proc_buffer_int.buffer_alloc) {
386 deblock_and_de_macro_block(&cm->post_proc_buffer_int, ppbuf,
387 q + (ppflags->deblocking_level - 5) * 10, 1, 0,
388 cm->postproc_state.limits);
389 } else if (flags & VP9D_DEBLOCK) {
390 vp9_deblock(&cm->post_proc_buffer_int, ppbuf, q,
391 cm->postproc_state.limits);
392 } else {
393 vpx_yv12_copy_frame(&cm->post_proc_buffer_int, ppbuf);
394 }
395 } else if (flags & VP9D_DEMACROBLOCK) {
396 deblock_and_de_macro_block(cm->frame_to_show, ppbuf,
397 q + (ppflags->deblocking_level - 5) * 10, 1, 0,
398 cm->postproc_state.limits);
399 } else if (flags & VP9D_DEBLOCK) {
400 vp9_deblock(cm->frame_to_show, ppbuf, q, cm->postproc_state.limits);
401 } else {
402 vpx_yv12_copy_frame(cm->frame_to_show, ppbuf);
403 }
404
405 ppstate->last_base_qindex = cm->base_qindex;
406 ppstate->last_frame_valid = 1;
407 if (flags & VP9D_ADDNOISE) {
408 const int noise_level = ppflags->noise_level;
409 if (ppstate->last_q != q || ppstate->last_noise != noise_level) {
410 double sigma;
411 vpx_clear_system_state();
412 sigma = noise_level + .5 + .6 * q / 63.0;
413 ppstate->clamp =
414 vpx_setup_noise(sigma, ppstate->generated_noise, cm->width + 256);
415 ppstate->last_q = q;
416 ppstate->last_noise = noise_level;
417 }
418 vpx_plane_add_noise(ppbuf->y_buffer, ppstate->generated_noise,
419 ppstate->clamp, ppstate->clamp, ppbuf->y_width,
420 ppbuf->y_height, ppbuf->y_stride);
421 }
422
423 *dest = *ppbuf;
424
425 /* handle problem with extending borders */
426 dest->y_width = cm->width;
427 dest->y_height = cm->height;
428 dest->uv_width = dest->y_width >> cm->subsampling_x;
429 dest->uv_height = dest->y_height >> cm->subsampling_y;
430
431 if (flags & VP9D_MFQE) swap_mi_and_prev_mi(cm);
432 return 0;
433 }
434 #endif // CONFIG_VP9_POSTPROC
435