1 /*
2 * BobWeaver Deinterlacing Filter
3 * Copyright (C) 2016 Thomas Mundt <loudmax@yahoo.de>
4 *
5 * Based on YADIF (Yet Another Deinterlacing Filter)
6 * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
7 * 2010 James Darnley <james.darnley@gmail.com>
8 *
9 * With use of Weston 3 Field Deinterlacing Filter algorithm
10 * Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved
11 * Author of de-interlace algorithm: Jim Easterbrook for BBC R&D
12 * Based on the process described by Martin Weston for BBC R&D
13 *
14 * This file is part of FFmpeg.
15 *
16 * FFmpeg is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU Lesser General Public
18 * License as published by the Free Software Foundation; either
19 * version 2.1 of the License, or (at your option) any later version.
20 *
21 * FFmpeg is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 * Lesser General Public License for more details.
25 *
26 * You should have received a copy of the GNU Lesser General Public
27 * License along with FFmpeg; if not, write to the Free Software
28 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 */
30
31 #include "libavutil/avassert.h"
32 #include "libavutil/common.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/imgutils.h"
36 #include "avfilter.h"
37 #include "formats.h"
38 #include "internal.h"
39 #include "video.h"
40 #include "bwdif.h"
41
42 /*
43 * Filter coefficients coef_lf and coef_hf taken from BBC PH-2071 (Weston 3 Field Deinterlacer).
44 * Used when there is spatial and temporal interpolation.
45 * Filter coefficients coef_sp are used when there is spatial interpolation only.
46 * Adjusted for matching visual sharpness impression of spatial and temporal interpolation.
47 */
48 static const uint16_t coef_lf[2] = { 4309, 213 };
49 static const uint16_t coef_hf[3] = { 5570, 3801, 1016 };
50 static const uint16_t coef_sp[2] = { 5077, 981 };
51
52 typedef struct ThreadData {
53 AVFrame *frame;
54 int plane;
55 int w, h;
56 int parity;
57 int tff;
58 } ThreadData;
59
60 #define FILTER_INTRA() \
61 for (x = 0; x < w; x++) { \
62 interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
63 dst[0] = av_clip(interpol, 0, clip_max); \
64 \
65 dst++; \
66 cur++; \
67 }
68
69 #define FILTER1() \
70 for (x = 0; x < w; x++) { \
71 int c = cur[mrefs]; \
72 int d = (prev2[0] + next2[0]) >> 1; \
73 int e = cur[prefs]; \
74 int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
75 int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \
76 int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \
77 int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
78 \
79 if (!diff) { \
80 dst[0] = d; \
81 } else {
82
83 #define SPAT_CHECK() \
84 int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \
85 int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \
86 int dc = d - c; \
87 int de = d - e; \
88 int max = FFMAX3(de, dc, FFMIN(b, f)); \
89 int min = FFMIN3(de, dc, FFMAX(b, f)); \
90 diff = FFMAX3(diff, min, -max);
91
92 #define FILTER_LINE() \
93 SPAT_CHECK() \
94 if (FFABS(c - e) > temporal_diff0) { \
95 interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \
96 - coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \
97 + coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \
98 + coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
99 } else { \
100 interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
101 }
102
103 #define FILTER_EDGE() \
104 if (spat) { \
105 SPAT_CHECK() \
106 } \
107 interpol = (c + e) >> 1;
108
109 #define FILTER2() \
110 if (interpol > d + diff) \
111 interpol = d + diff; \
112 else if (interpol < d - diff) \
113 interpol = d - diff; \
114 \
115 dst[0] = av_clip(interpol, 0, clip_max); \
116 } \
117 \
118 dst++; \
119 cur++; \
120 prev++; \
121 next++; \
122 prev2++; \
123 next2++; \
124 }
125
filter_intra(void * dst1,void * cur1,int w,int prefs,int mrefs,int prefs3,int mrefs3,int parity,int clip_max)126 static void filter_intra(void *dst1, void *cur1, int w, int prefs, int mrefs,
127 int prefs3, int mrefs3, int parity, int clip_max)
128 {
129 uint8_t *dst = dst1;
130 uint8_t *cur = cur1;
131 int interpol, x;
132
133 FILTER_INTRA()
134 }
135
filter_line_c(void * dst1,void * prev1,void * cur1,void * next1,int w,int prefs,int mrefs,int prefs2,int mrefs2,int prefs3,int mrefs3,int prefs4,int mrefs4,int parity,int clip_max)136 static void filter_line_c(void *dst1, void *prev1, void *cur1, void *next1,
137 int w, int prefs, int mrefs, int prefs2, int mrefs2,
138 int prefs3, int mrefs3, int prefs4, int mrefs4,
139 int parity, int clip_max)
140 {
141 uint8_t *dst = dst1;
142 uint8_t *prev = prev1;
143 uint8_t *cur = cur1;
144 uint8_t *next = next1;
145 uint8_t *prev2 = parity ? prev : cur ;
146 uint8_t *next2 = parity ? cur : next;
147 int interpol, x;
148
149 FILTER1()
150 FILTER_LINE()
151 FILTER2()
152 }
153
filter_edge(void * dst1,void * prev1,void * cur1,void * next1,int w,int prefs,int mrefs,int prefs2,int mrefs2,int parity,int clip_max,int spat)154 static void filter_edge(void *dst1, void *prev1, void *cur1, void *next1,
155 int w, int prefs, int mrefs, int prefs2, int mrefs2,
156 int parity, int clip_max, int spat)
157 {
158 uint8_t *dst = dst1;
159 uint8_t *prev = prev1;
160 uint8_t *cur = cur1;
161 uint8_t *next = next1;
162 uint8_t *prev2 = parity ? prev : cur ;
163 uint8_t *next2 = parity ? cur : next;
164 int interpol, x;
165
166 FILTER1()
167 FILTER_EDGE()
168 FILTER2()
169 }
170
filter_intra_16bit(void * dst1,void * cur1,int w,int prefs,int mrefs,int prefs3,int mrefs3,int parity,int clip_max)171 static void filter_intra_16bit(void *dst1, void *cur1, int w, int prefs, int mrefs,
172 int prefs3, int mrefs3, int parity, int clip_max)
173 {
174 uint16_t *dst = dst1;
175 uint16_t *cur = cur1;
176 int interpol, x;
177
178 FILTER_INTRA()
179 }
180
filter_line_c_16bit(void * dst1,void * prev1,void * cur1,void * next1,int w,int prefs,int mrefs,int prefs2,int mrefs2,int prefs3,int mrefs3,int prefs4,int mrefs4,int parity,int clip_max)181 static void filter_line_c_16bit(void *dst1, void *prev1, void *cur1, void *next1,
182 int w, int prefs, int mrefs, int prefs2, int mrefs2,
183 int prefs3, int mrefs3, int prefs4, int mrefs4,
184 int parity, int clip_max)
185 {
186 uint16_t *dst = dst1;
187 uint16_t *prev = prev1;
188 uint16_t *cur = cur1;
189 uint16_t *next = next1;
190 uint16_t *prev2 = parity ? prev : cur ;
191 uint16_t *next2 = parity ? cur : next;
192 int interpol, x;
193
194 FILTER1()
195 FILTER_LINE()
196 FILTER2()
197 }
198
filter_edge_16bit(void * dst1,void * prev1,void * cur1,void * next1,int w,int prefs,int mrefs,int prefs2,int mrefs2,int parity,int clip_max,int spat)199 static void filter_edge_16bit(void *dst1, void *prev1, void *cur1, void *next1,
200 int w, int prefs, int mrefs, int prefs2, int mrefs2,
201 int parity, int clip_max, int spat)
202 {
203 uint16_t *dst = dst1;
204 uint16_t *prev = prev1;
205 uint16_t *cur = cur1;
206 uint16_t *next = next1;
207 uint16_t *prev2 = parity ? prev : cur ;
208 uint16_t *next2 = parity ? cur : next;
209 int interpol, x;
210
211 FILTER1()
212 FILTER_EDGE()
213 FILTER2()
214 }
215
filter_slice(AVFilterContext * ctx,void * arg,int jobnr,int nb_jobs)216 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
217 {
218 BWDIFContext *s = ctx->priv;
219 YADIFContext *yadif = &s->yadif;
220 ThreadData *td = arg;
221 int linesize = yadif->cur->linesize[td->plane];
222 int clip_max = (1 << (yadif->csp->comp[td->plane].depth)) - 1;
223 int df = (yadif->csp->comp[td->plane].depth + 7) / 8;
224 int refs = linesize / df;
225 int slice_start = (td->h * jobnr ) / nb_jobs;
226 int slice_end = (td->h * (jobnr+1)) / nb_jobs;
227 int y;
228
229 for (y = slice_start; y < slice_end; y++) {
230 if ((y ^ td->parity) & 1) {
231 uint8_t *prev = &yadif->prev->data[td->plane][y * linesize];
232 uint8_t *cur = &yadif->cur ->data[td->plane][y * linesize];
233 uint8_t *next = &yadif->next->data[td->plane][y * linesize];
234 uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]];
235 if (yadif->current_field == YADIF_FIELD_END) {
236 s->filter_intra(dst, cur, td->w, (y + df) < td->h ? refs : -refs,
237 y > (df - 1) ? -refs : refs,
238 (y + 3*df) < td->h ? 3 * refs : -refs,
239 y > (3*df - 1) ? -3 * refs : refs,
240 td->parity ^ td->tff, clip_max);
241 } else if ((y < 4) || ((y + 5) > td->h)) {
242 s->filter_edge(dst, prev, cur, next, td->w,
243 (y + df) < td->h ? refs : -refs,
244 y > (df - 1) ? -refs : refs,
245 refs << 1, -(refs << 1),
246 td->parity ^ td->tff, clip_max,
247 (y < 2) || ((y + 3) > td->h) ? 0 : 1);
248 } else {
249 s->filter_line(dst, prev, cur, next, td->w,
250 refs, -refs, refs << 1, -(refs << 1),
251 3 * refs, -3 * refs, refs << 2, -(refs << 2),
252 td->parity ^ td->tff, clip_max);
253 }
254 } else {
255 memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]],
256 &yadif->cur->data[td->plane][y * linesize], td->w * df);
257 }
258 }
259 return 0;
260 }
261
filter(AVFilterContext * ctx,AVFrame * dstpic,int parity,int tff)262 static void filter(AVFilterContext *ctx, AVFrame *dstpic,
263 int parity, int tff)
264 {
265 BWDIFContext *bwdif = ctx->priv;
266 YADIFContext *yadif = &bwdif->yadif;
267 ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff };
268 int i;
269
270 for (i = 0; i < yadif->csp->nb_components; i++) {
271 int w = dstpic->width;
272 int h = dstpic->height;
273
274 if (i == 1 || i == 2) {
275 w = AV_CEIL_RSHIFT(w, yadif->csp->log2_chroma_w);
276 h = AV_CEIL_RSHIFT(h, yadif->csp->log2_chroma_h);
277 }
278
279 td.w = w;
280 td.h = h;
281 td.plane = i;
282
283 ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(h, ff_filter_get_nb_threads(ctx)));
284 }
285 if (yadif->current_field == YADIF_FIELD_END) {
286 yadif->current_field = YADIF_FIELD_NORMAL;
287 }
288
289 emms_c();
290 }
291
uninit(AVFilterContext * ctx)292 static av_cold void uninit(AVFilterContext *ctx)
293 {
294 BWDIFContext *bwdif = ctx->priv;
295 YADIFContext *yadif = &bwdif->yadif;
296
297 av_frame_free(&yadif->prev);
298 av_frame_free(&yadif->cur );
299 av_frame_free(&yadif->next);
300 }
301
query_formats(AVFilterContext * ctx)302 static int query_formats(AVFilterContext *ctx)
303 {
304 static const enum AVPixelFormat pix_fmts[] = {
305 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV420P,
306 AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
307 AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P,
308 AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
309 AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
310 AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
311 AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
312 AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
313 AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
314 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
315 AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
316 AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
317 AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
318 AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
319 AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
320 AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16,
321 AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
322 AV_PIX_FMT_NONE
323 };
324
325 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
326 if (!fmts_list)
327 return AVERROR(ENOMEM);
328
329 return ff_set_common_formats(ctx, fmts_list);
330 }
331
config_props(AVFilterLink * link)332 static int config_props(AVFilterLink *link)
333 {
334 AVFilterContext *ctx = link->src;
335 BWDIFContext *s = link->src->priv;
336 YADIFContext *yadif = &s->yadif;
337
338 link->time_base.num = link->src->inputs[0]->time_base.num;
339 link->time_base.den = link->src->inputs[0]->time_base.den * 2;
340 link->w = link->src->inputs[0]->w;
341 link->h = link->src->inputs[0]->h;
342
343 if(yadif->mode&1)
344 link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});
345
346 if (link->w < 3 || link->h < 4) {
347 av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or 4 lines is not supported\n");
348 return AVERROR(EINVAL);
349 }
350
351 yadif->csp = av_pix_fmt_desc_get(link->format);
352 yadif->filter = filter;
353 if (yadif->csp->comp[0].depth > 8) {
354 s->filter_intra = filter_intra_16bit;
355 s->filter_line = filter_line_c_16bit;
356 s->filter_edge = filter_edge_16bit;
357 } else {
358 s->filter_intra = filter_intra;
359 s->filter_line = filter_line_c;
360 s->filter_edge = filter_edge;
361 }
362
363 if (ARCH_X86)
364 ff_bwdif_init_x86(s);
365
366 return 0;
367 }
368
369
370 #define OFFSET(x) offsetof(YADIFContext, x)
371 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
372
373 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
374
375 static const AVOption bwdif_options[] = {
376 { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"},
377 CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
378 CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
379
380 { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
381 CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
382 CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
383 CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
384
385 { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
386 CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
387 CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
388
389 { NULL }
390 };
391
392 AVFILTER_DEFINE_CLASS(bwdif);
393
394 static const AVFilterPad avfilter_vf_bwdif_inputs[] = {
395 {
396 .name = "default",
397 .type = AVMEDIA_TYPE_VIDEO,
398 .filter_frame = ff_yadif_filter_frame,
399 },
400 { NULL }
401 };
402
403 static const AVFilterPad avfilter_vf_bwdif_outputs[] = {
404 {
405 .name = "default",
406 .type = AVMEDIA_TYPE_VIDEO,
407 .request_frame = ff_yadif_request_frame,
408 .config_props = config_props,
409 },
410 { NULL }
411 };
412
413 AVFilter ff_vf_bwdif = {
414 .name = "bwdif",
415 .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
416 .priv_size = sizeof(BWDIFContext),
417 .priv_class = &bwdif_class,
418 .uninit = uninit,
419 .query_formats = query_formats,
420 .inputs = avfilter_vf_bwdif_inputs,
421 .outputs = avfilter_vf_bwdif_outputs,
422 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
423 };
424