Line data Source code
1 : /*
2 : * Copyright (c) 2018 Paul B Mahol
3 : *
4 : * This file is part of FFmpeg.
5 : *
6 : * FFmpeg is free software; you can redistribute it and/or
7 : * modify it under the terms of the GNU Lesser General Public
8 : * License as published by the Free Software Foundation; either
9 : * version 2.1 of the License, or (at your option) any later version.
10 : *
11 : * FFmpeg is distributed in the hope that it will be useful,
12 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 : * Lesser General Public License for more details.
15 : *
16 : * You should have received a copy of the GNU Lesser General Public
17 : * License along with FFmpeg; if not, write to the Free Software
18 : * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 : */
20 :
21 : /*
22 : * Based on paper: A Simple and Efficient Deblocking Algorithm for Low Bit-Rate Video Coding.
23 : */
24 :
25 : #include "libavutil/imgutils.h"
26 : #include "libavutil/opt.h"
27 : #include "libavutil/pixdesc.h"
28 :
29 : #include "avfilter.h"
30 : #include "formats.h"
31 : #include "internal.h"
32 : #include "video.h"
33 :
34 : enum FilterType { WEAK, STRONG, NB_FILTER };
35 :
36 : typedef struct DeblockContext {
37 : const AVClass *class;
38 : const AVPixFmtDescriptor *desc;
39 : int filter;
40 : int block;
41 : int planes;
42 : float alpha;
43 : float beta;
44 : float gamma;
45 : float delta;
46 :
47 : int ath;
48 : int bth;
49 : int gth;
50 : int dth;
51 : int max;
52 : int depth;
53 : int bpc;
54 : int nb_planes;
55 : int planewidth[4];
56 : int planeheight[4];
57 :
58 : void (*deblockh)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
59 : int ath, int bth, int gth, int dth, int max);
60 : void (*deblockv)(uint8_t *dst, ptrdiff_t dst_linesize, int block,
61 : int ath, int bth, int gth, int dth, int max);
62 : } DeblockContext;
63 :
64 0 : static int query_formats(AVFilterContext *ctx)
65 : {
66 : static const enum AVPixelFormat pixel_fmts[] = {
67 : AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
68 : AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
69 : AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
70 : AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
71 : AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
72 : AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
73 : AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
74 : AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
75 : AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
76 : AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
77 : AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
78 : AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
79 : AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
80 : AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
81 : AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
82 : AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
83 : AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY16,
84 : AV_PIX_FMT_NONE
85 : };
86 0 : AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
87 0 : if (!formats)
88 0 : return AVERROR(ENOMEM);
89 0 : return ff_set_common_formats(ctx, formats);
90 : }
91 :
92 : #define WEAK_HFILTER(name, type, ldiv) \
93 : static void deblockh##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
94 : int ath, int bth, int gth, int dth, int max) \
95 : { \
96 : type *dst; \
97 : int x; \
98 : \
99 : dst = (type *)dstp; \
100 : dst_linesize /= ldiv; \
101 : \
102 : for (x = 0; x < block; x++) { \
103 : int delta = dst[x] - dst[x - dst_linesize]; \
104 : int A, B, C, D, a, b, c, d; \
105 : \
106 : if (FFABS(delta) >= ath || \
107 : FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
108 : FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= gth) \
109 : continue; \
110 : \
111 : A = dst[x - 2 * dst_linesize]; \
112 : B = dst[x - 1 * dst_linesize]; \
113 : C = dst[x + 0 * dst_linesize]; \
114 : D = dst[x + 1 * dst_linesize]; \
115 : \
116 : a = A + delta / 8; \
117 : b = B + delta / 2; \
118 : c = C - delta / 2; \
119 : d = D - delta / 8; \
120 : \
121 : dst[x - 2 * dst_linesize] = av_clip(a, 0, max); \
122 : dst[x - 1 * dst_linesize] = av_clip(b, 0, max); \
123 : dst[x + 0 * dst_linesize] = av_clip(c, 0, max); \
124 : dst[x + 1 * dst_linesize] = av_clip(d, 0, max); \
125 : } \
126 : }
127 :
128 0 : WEAK_HFILTER(8, uint8_t, 1)
129 0 : WEAK_HFILTER(16, uint16_t, 2)
130 :
131 : #define WEAK_VFILTER(name, type, ldiv) \
132 : static void deblockv##name##_weak(uint8_t *dstp, ptrdiff_t dst_linesize, int block, \
133 : int ath, int bth, int gth, int dth, int max) \
134 : { \
135 : type *dst; \
136 : int y; \
137 : \
138 : dst = (type *)dstp; \
139 : dst_linesize /= ldiv; \
140 : \
141 : for (y = 0; y < block; y++) { \
142 : int delta = dst[0] - dst[-1]; \
143 : int A, B, C, D, a, b, c, d; \
144 : \
145 : if (FFABS(delta) >= ath || \
146 : FFABS(dst[-1] - dst[-2]) >= bth || \
147 : FFABS(dst[0] - dst[1]) >= gth) \
148 : continue; \
149 : \
150 : A = dst[-2]; \
151 : B = dst[-1]; \
152 : C = dst[+0]; \
153 : D = dst[+1]; \
154 : \
155 : a = A + delta / 8; \
156 : b = B + delta / 2; \
157 : c = C - delta / 2; \
158 : d = D - delta / 8; \
159 : \
160 : dst[-2] = av_clip(a, 0, max); \
161 : dst[-1] = av_clip(b, 0, max); \
162 : dst[+0] = av_clip(c, 0, max); \
163 : dst[+1] = av_clip(d, 0, max); \
164 : \
165 : dst += dst_linesize; \
166 : } \
167 : }
168 :
169 0 : WEAK_VFILTER(8, uint8_t, 1)
170 0 : WEAK_VFILTER(16, uint16_t, 2)
171 :
172 : #define STRONG_HFILTER(name, type, ldiv) \
173 : static void deblockh##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
174 : int ath, int bth, int gth, int dth, int max) \
175 : { \
176 : type *dst; \
177 : int x; \
178 : \
179 : dst = (type *)dstp; \
180 : dst_linesize /= ldiv; \
181 : \
182 : for (x = 0; x < block; x++) { \
183 : int A, B, C, D, E, F, a, b, c, d, e, f; \
184 : int delta = dst[x] - dst[x - dst_linesize]; \
185 : \
186 : if (FFABS(delta) >= ath || \
187 : FFABS(dst[x - 1 * dst_linesize] - dst[x - 2 * dst_linesize]) >= bth || \
188 : FFABS(dst[x + 1 * dst_linesize] - dst[x + 2 * dst_linesize]) >= gth || \
189 : FFABS(dst[x + 0 * dst_linesize] - dst[x + 1 * dst_linesize]) >= dth) \
190 : continue; \
191 : \
192 : A = dst[x - 3 * dst_linesize]; \
193 : B = dst[x - 2 * dst_linesize]; \
194 : C = dst[x - 1 * dst_linesize]; \
195 : D = dst[x + 0 * dst_linesize]; \
196 : E = dst[x + 1 * dst_linesize]; \
197 : F = dst[x + 2 * dst_linesize]; \
198 : \
199 : a = A + delta / 8; \
200 : b = B + delta / 4; \
201 : c = C + delta / 2; \
202 : d = D - delta / 2; \
203 : e = E - delta / 4; \
204 : f = F - delta / 8; \
205 : \
206 : dst[x - 3 * dst_linesize] = av_clip(a, 0, max); \
207 : dst[x - 2 * dst_linesize] = av_clip(b, 0, max); \
208 : dst[x - 1 * dst_linesize] = av_clip(c, 0, max); \
209 : dst[x + 0 * dst_linesize] = av_clip(d, 0, max); \
210 : dst[x + 1 * dst_linesize] = av_clip(e, 0, max); \
211 : dst[x + 2 * dst_linesize] = av_clip(f, 0, max); \
212 : } \
213 : }
214 :
215 0 : STRONG_HFILTER(8, uint8_t, 1)
216 0 : STRONG_HFILTER(16, uint16_t, 2)
217 :
218 : #define STRONG_VFILTER(name, type, ldiv) \
219 : static void deblockv##name##_strong(uint8_t *dstp, ptrdiff_t dst_linesize, int block,\
220 : int ath, int bth, int gth, int dth, int max) \
221 : { \
222 : type *dst; \
223 : int y; \
224 : \
225 : dst = (type *)dstp; \
226 : dst_linesize /= ldiv; \
227 : \
228 : for (y = 0; y < block; y++) { \
229 : int A, B, C, D, E, F, a, b, c, d, e, f; \
230 : int delta = dst[0] - dst[-1]; \
231 : \
232 : if (FFABS(delta) >= ath || \
233 : FFABS(dst[-1] - dst[-2]) >= bth || \
234 : FFABS(dst[+1] - dst[+2]) >= gth || \
235 : FFABS(dst[+0] - dst[+1]) >= dth) \
236 : continue; \
237 : \
238 : A = dst[-3]; \
239 : B = dst[-2]; \
240 : C = dst[-1]; \
241 : D = dst[+0]; \
242 : E = dst[+1]; \
243 : F = dst[+2]; \
244 : \
245 : a = A + delta / 8; \
246 : b = B + delta / 4; \
247 : c = C + delta / 2; \
248 : d = D - delta / 2; \
249 : e = E - delta / 4; \
250 : f = F - delta / 8; \
251 : \
252 : dst[-3] = av_clip(a, 0, max); \
253 : dst[-2] = av_clip(b, 0, max); \
254 : dst[-1] = av_clip(c, 0, max); \
255 : dst[+0] = av_clip(d, 0, max); \
256 : dst[+1] = av_clip(e, 0, max); \
257 : dst[+2] = av_clip(f, 0, max); \
258 : \
259 : dst += dst_linesize; \
260 : } \
261 : }
262 :
263 0 : STRONG_VFILTER(8, uint8_t, 1)
264 0 : STRONG_VFILTER(16, uint16_t, 2)
265 :
266 0 : static int config_output(AVFilterLink *outlink)
267 : {
268 0 : AVFilterContext *ctx = outlink->src;
269 0 : DeblockContext *s = ctx->priv;
270 0 : AVFilterLink *inlink = ctx->inputs[0];
271 :
272 0 : s->desc = av_pix_fmt_desc_get(outlink->format);
273 0 : if (!s->desc)
274 0 : return AVERROR_BUG;
275 0 : s->nb_planes = av_pix_fmt_count_planes(outlink->format);
276 0 : s->depth = s->desc->comp[0].depth;
277 0 : s->bpc = (s->depth + 7) / 8;
278 0 : s->max = (1 << s->depth) - 1;
279 0 : s->ath = s->alpha * s->max;
280 0 : s->bth = s->beta * s->max;
281 0 : s->gth = s->gamma * s->max;
282 0 : s->dth = s->delta * s->max;
283 :
284 0 : if (s->depth <= 8 && s->filter == WEAK) {
285 0 : s->deblockh = deblockh8_weak;
286 0 : s->deblockv = deblockv8_weak;
287 0 : } else if (s->depth >= 8 && s->filter == WEAK) {
288 0 : s->deblockh = deblockh16_weak;
289 0 : s->deblockv = deblockv16_weak;
290 : }
291 0 : if (s->depth <= 8 && s->filter == STRONG) {
292 0 : s->deblockh = deblockh8_strong;
293 0 : s->deblockv = deblockv8_strong;
294 0 : } else if (s->depth >= 8 && s->filter == STRONG) {
295 0 : s->deblockh = deblockh16_strong;
296 0 : s->deblockv = deblockv16_strong;
297 : }
298 :
299 0 : s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
300 0 : s->planewidth[0] = s->planewidth[3] = inlink->w;
301 :
302 0 : s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
303 0 : s->planeheight[0] = s->planeheight[3] = inlink->h;
304 :
305 0 : return 0;
306 : }
307 :
308 0 : static int filter_frame(AVFilterLink *inlink, AVFrame *in)
309 : {
310 0 : AVFilterContext *ctx = inlink->dst;
311 0 : AVFilterLink *outlink = ctx->outputs[0];
312 0 : DeblockContext *s = ctx->priv;
313 0 : const int block = s->block;
314 : AVFrame *out;
315 : int plane, x, y;
316 :
317 0 : if (av_frame_is_writable(in)) {
318 0 : out = in;
319 : } else {
320 0 : out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
321 0 : if (!out) {
322 0 : av_frame_free(&in);
323 0 : return AVERROR(ENOMEM);
324 : }
325 0 : av_frame_copy_props(out, in);
326 : }
327 :
328 0 : for (plane = 0; plane < s->nb_planes; plane++) {
329 0 : const int width = s->planewidth[plane];
330 0 : const int height = s->planeheight[plane];
331 0 : const uint8_t *src = (const uint8_t *)in->data[plane];
332 0 : uint8_t *dst = (uint8_t *)out->data[plane];
333 :
334 0 : if (in != out)
335 0 : av_image_copy_plane(dst, out->linesize[plane],
336 0 : src, in->linesize[plane],
337 0 : width * s->bpc, height);
338 :
339 0 : if (!((1 << plane) & s->planes))
340 0 : continue;
341 :
342 0 : for (x = block; x < width; x += block)
343 0 : s->deblockv(dst + x * s->bpc, out->linesize[plane],
344 : FFMIN(block, height), s->ath, s->bth, s->gth, s->dth, s->max);
345 :
346 0 : for (y = block; y < height; y += block) {
347 0 : dst += out->linesize[plane] * block;
348 :
349 0 : s->deblockh(dst, out->linesize[plane],
350 : FFMIN(block, width),
351 : s->ath, s->bth, s->gth, s->dth, s->max);
352 :
353 0 : for (x = block; x < width; x += block) {
354 0 : s->deblockh(dst + x * s->bpc, out->linesize[plane],
355 0 : FFMIN(block, width - x),
356 : s->ath, s->bth, s->gth, s->dth, s->max);
357 0 : s->deblockv(dst + x * s->bpc, out->linesize[plane],
358 0 : FFMIN(block, height - y),
359 : s->ath, s->bth, s->gth, s->dth, s->max);
360 : }
361 : }
362 : }
363 :
364 0 : if (in != out)
365 0 : av_frame_free(&in);
366 0 : return ff_filter_frame(outlink, out);
367 : }
368 :
369 : #define OFFSET(x) offsetof(DeblockContext, x)
370 : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
371 :
372 : static const AVOption deblock_options[] = {
373 : { "filter", "set type of filter", OFFSET(filter), AV_OPT_TYPE_INT, {.i64=STRONG},0, 1, FLAGS, "filter" },
374 : { "weak", 0, 0, AV_OPT_TYPE_CONST, {.i64=WEAK}, 0, 0, FLAGS, "filter" },
375 : { "strong", 0, 0, AV_OPT_TYPE_CONST, {.i64=STRONG},0, 0, FLAGS, "filter" },
376 : { "block", "set size of block", OFFSET(block), AV_OPT_TYPE_INT, {.i64=8}, 4, 512, FLAGS },
377 : { "alpha", "set 1st detection threshold", OFFSET(alpha), AV_OPT_TYPE_FLOAT, {.dbl=.098}, 0, 1, FLAGS },
378 : { "beta", "set 2nd detection threshold", OFFSET(beta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
379 : { "gamma", "set 3rd detection threshold", OFFSET(gamma), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
380 : { "delta", "set 4th detection threshold", OFFSET(delta), AV_OPT_TYPE_FLOAT, {.dbl=.05}, 0, 1, FLAGS },
381 : { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS },
382 : { NULL },
383 : };
384 :
385 : static const AVFilterPad inputs[] = {
386 : {
387 : .name = "default",
388 : .type = AVMEDIA_TYPE_VIDEO,
389 : .filter_frame = filter_frame,
390 : },
391 : { NULL }
392 : };
393 :
394 : static const AVFilterPad outputs[] = {
395 : {
396 : .name = "default",
397 : .type = AVMEDIA_TYPE_VIDEO,
398 : .config_props = config_output,
399 : },
400 : { NULL }
401 : };
402 :
403 : AVFILTER_DEFINE_CLASS(deblock);
404 :
405 : AVFilter ff_vf_deblock = {
406 : .name = "deblock",
407 : .description = NULL_IF_CONFIG_SMALL("Deblock video."),
408 : .priv_size = sizeof(DeblockContext),
409 : .priv_class = &deblock_class,
410 : .query_formats = query_formats,
411 : .inputs = inputs,
412 : .outputs = outputs,
413 : .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
414 : };
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