FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2021 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			#include "libavutil/common.h"
22			#include "libavutil/imgutils.h"
23			#include "libavutil/opt.h"
24			#include "libavutil/pixdesc.h"
25			#include "avfilter.h"
26			#include "filters.h"
27			#include "video.h"
28
29			typedef struct ESTDIFContext {
30			const AVClass *class;
31
32			int mode; ///< 0 is frame, 1 is field
33			int parity; ///< frame field parity
34			int deint; ///< which frames to deinterlace
35			int rslope; ///< best edge slope search radius
36			int redge; ///< best edge match search radius
37			int ecost; ///< edge cost for edge matching
38			int mcost; ///< middle cost for edge matching
39			int dcost; ///< distance cost for edge matching
40			int interp; ///< type of interpolation
41			int linesize[4]; ///< bytes of pixel data per line for each plane
42			int planewidth[4]; ///< width of each plane
43			int planeheight[4]; ///< height of each plane
44			int field; ///< which field are we on, 0 or 1
45			int eof;
46			int depth;
47			int max;
48			int nb_planes;
49			int nb_threads;
50			AVFrame *prev;
51
52			void (*interpolate)(struct ESTDIFContext *s, uint8_t *dst,
53			const uint8_t *prev_line, const uint8_t *next_line,
54			const uint8_t *prev2_line, const uint8_t *next2_line,
55			const uint8_t *prev3_line, const uint8_t *next3_line,
56			int x, int width, int rslope, int redge,
57			int depth, int *K);
58
59			unsigned (*mid_8[3])(const uint8_t *const prev,
60			const uint8_t *const next,
61			const uint8_t *const prev2,
62			const uint8_t *const next2,
63			const uint8_t *const prev3,
64			const uint8_t *const next3,
65			int end, int x, int k, int depth);
66
67			unsigned (*mid_16[3])(const uint16_t *const prev,
68			const uint16_t *const next,
69			const uint16_t *const prev2,
70			const uint16_t *const next2,
71			const uint16_t *const prev3,
72			const uint16_t *const next3,
73			int end, int x, int k, int depth);
74			} ESTDIFContext;
75
76			#define MAX_R 15
77			#define S (MAX_R * 2 + 1)
78
79			#define OFFSET(x) offsetof(ESTDIFContext, x)
80			#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
81			#define CONST(name, help, val, u) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, .unit = u }
82
83			static const AVOption estdif_options[] = {
84			{ "mode", "specify the mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, .unit = "mode" },
85			CONST("frame", "send one frame for each frame", 0, "mode"),
86			CONST("field", "send one frame for each field", 1, "mode"),
87			{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=-1}, -1, 1, FLAGS, .unit = "parity" },
88			CONST("tff", "assume top field first", 0, "parity"),
89			CONST("bff", "assume bottom field first", 1, "parity"),
90			CONST("auto", "auto detect parity", -1, "parity"),
91			{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "deint" },
92			CONST("all", "deinterlace all frames", 0, "deint"),
93			CONST("interlaced", "only deinterlace frames marked as interlaced", 1, "deint"),
94			{ "rslope", "specify the search radius for edge slope tracing", OFFSET(rslope), AV_OPT_TYPE_INT, {.i64=1}, 1, MAX_R, FLAGS },
95			{ "redge", "specify the search radius for best edge matching", OFFSET(redge), AV_OPT_TYPE_INT, {.i64=2}, 0, MAX_R, FLAGS },
96			{ "ecost", "specify the edge cost for edge matching", OFFSET(ecost), AV_OPT_TYPE_INT, {.i64=2}, 0, 50, FLAGS },
97			{ "mcost", "specify the middle cost for edge matching", OFFSET(mcost), AV_OPT_TYPE_INT, {.i64=1}, 0, 50, FLAGS },
98			{ "dcost", "specify the distance cost for edge matching", OFFSET(dcost), AV_OPT_TYPE_INT, {.i64=1}, 0, 50, FLAGS },
99			{ "interp", "specify the type of interpolation", OFFSET(interp), AV_OPT_TYPE_INT, {.i64=1}, 0, 2, FLAGS, .unit = "interp" },
100			CONST("2p", "two-point interpolation", 0, "interp"),
101			CONST("4p", "four-point interpolation", 1, "interp"),
102			CONST("6p", "six-point interpolation", 2, "interp"),
103			{ NULL }
104			};
105
106			AVFILTER_DEFINE_CLASS(estdif);
107
108			static const enum AVPixelFormat pix_fmts[] = {
109			AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
110			AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
111			AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
112			AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
113			AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
114			AV_PIX_FMT_YUVJ411P,
115			AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
116			AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
117			AV_PIX_FMT_GRAY8,
118			AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
119			AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
120			AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
121			AV_PIX_FMT_YUV440P10,
122			AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
123			AV_PIX_FMT_YUV440P12,
124			AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
125			AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
126			AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
127			AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
128			AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
129			AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
130			AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
131			AV_PIX_FMT_NONE
132			};
133
134		✗	static int config_output(AVFilterLink *outlink)
135			{
136		✗	FilterLink *outl = ff_filter_link(outlink);
137		✗	AVFilterContext *ctx = outlink->src;
138		✗	AVFilterLink *inlink = ctx->inputs[0];
139		✗	FilterLink *inl = ff_filter_link(inlink);
140		✗	ESTDIFContext *s = ctx->priv;
141
142		✗	outlink->time_base = av_mul_q(inlink->time_base, (AVRational){1, 2});
143		✗	if (s->mode)
144		✗	outl->frame_rate = av_mul_q(inl->frame_rate, (AVRational){2, 1});
145
146		✗	return 0;
147			}
148
149			typedef struct ThreadData {
150			AVFrame *out, *in;
151			} ThreadData;
152
153			#define MIDL(type, ss) \
154			static unsigned midl_##ss(const type *const prev, \
155			const type *const next, \
156			int end, int x, int k) \
157			{ \
158			return (prev[av_clip(x + k, 0, end)] + \
159			next[av_clip(x - k, 0, end)] + 1) >> 1; \
160			}
161
162		✗	MIDL(uint8_t, 8)
163		✗	MIDL(uint16_t, 16)
164
165			#define MID2(type, ss) \
166			static unsigned mid2_##ss(const type *const prev, \
167			const type *const next, \
168			const type *const prev2, \
169			const type *const next2, \
170			const type *const prev3, \
171			const type *const next3, \
172			int end, int x, int k, int depth) \
173			{ \
174			return (prev[av_clip(x + k, 0, end)] + \
175			next[av_clip(x - k, 0, end)] + 1) >> 1; \
176			}
177
178		✗	MID2(uint8_t, 8)
179		✗	MID2(uint16_t, 16)
180
181			#define MID4(type, ss) \
182			static unsigned mid4_##ss(const type *const prev, \
183			const type *const next, \
184			const type *const prev2, \
185			const type *const next2, \
186			const type *const prev3, \
187			const type *const next3, \
188			int end, int x, int k, int depth) \
189			{ \
190			return av_clip_uintp2_c(( \
191			9 * (prev[av_clip(x + k, 0, end)] + \
192			next[av_clip(x - k, 0, end)]) - \
193			1 * (prev2[av_clip(x + k*3, 0, end)] + \
194			next2[av_clip(x - k*3, 0, end)]) + 8) >> 4, \
195			depth); \
196			}
197
198		✗	MID4(uint8_t, 8)
199		✗	MID4(uint16_t, 16)
200
201			#define MID6(type, ss) \
202			static unsigned mid6_##ss(const type *const prev, \
203			const type *const next, \
204			const type *const prev2, \
205			const type *const next2, \
206			const type *const prev3, \
207			const type *const next3, \
208			int end, int x, int k, int depth) \
209			{ \
210			return av_clip_uintp2_c(( \
211			20 * (prev[av_clip(x + k, 0, end)] + \
212			next[av_clip(x - k, 0, end)]) - \
213			5 * (prev2[av_clip(x + k*3, 0, end)] + \
214			next2[av_clip(x - k*3, 0, end)]) + \
215			1 * (prev3[av_clip(x + k*5, 0, end)] + \
216			next3[av_clip(x - k*5, 0, end)]) + 16) >> 5, \
217			depth); \
218			}
219
220		✗	MID6(uint8_t, 8)
221		✗	MID6(uint16_t, 16)
222
223			#define DIFF(type, ss) \
224			static unsigned diff_##ss(const type *const prev, \
225			const type *const next, \
226			int x, int y) \
227			{ \
228			return FFABS(prev[x] - next[y]); \
229			}
230
231		✗	DIFF(uint8_t, 8)
232		✗	DIFF(uint16_t, 16)
233
234			#define COST(type, ss) \
235			static unsigned cost_##ss(const type *const prev, \
236			const type *const next, \
237			int end, int x, int k) \
238			{ \
239			const int m = midl_##ss(prev, next, end, x, k); \
240			const int p = prev[x]; \
241			const int n = next[x]; \
242			\
243			return FFABS(p - m) + FFABS(n - m); \
244			}
245
246		✗	COST(uint8_t, 8)
247		✗	COST(uint16_t, 16)
248
249			#define INTERPOLATE(type, atype, amax, ss) \
250			static void interpolate_##ss(ESTDIFContext *s, uint8_t *ddst, \
251			const uint8_t *const pprev_line, \
252			const uint8_t *const nnext_line, \
253			const uint8_t *const pprev2_line, \
254			const uint8_t *const nnext2_line, \
255			const uint8_t *const pprev3_line, \
256			const uint8_t *const nnext3_line, \
257			int x, int width, int rslope, \
258			int redge, int depth, \
259			int *K) \
260			{ \
261			type *dst = (type *)ddst; \
262			const type *const prev_line = (const type *const)pprev_line; \
263			const type *const prev2_line = (const type *const)pprev2_line; \
264			const type *const prev3_line = (const type *const)pprev3_line; \
265			const type *const next_line = (const type *const)nnext_line; \
266			const type *const next2_line = (const type *const)nnext2_line; \
267			const type *const next3_line = (const type *const)nnext3_line; \
268			const int interp = s->interp; \
269			const int ecost = s->ecost; \
270			const int dcost = s->dcost; \
271			const int mcost = s->mcost; \
272			atype sd[S], sD[S], di = 0; \
273			const int end = width - 1; \
274			atype dmin = amax; \
275			int id = 0, iD = 0; \
276			int k = *K; \
277			\
278			for (int i = -rslope; i <= rslope && abs(k) > rslope; i++) { \
279			atype sum = 0; \
280			\
281			for (int j = -redge; j <= redge; j++) { \
282			const int xx = av_clip(x + i + j, 0, end); \
283			const int yy = av_clip(x - i + j, 0, end); \
284			sum += diff_##ss(prev_line, next_line, xx, yy); \
285			sum += diff_##ss(prev2_line, prev_line, xx, yy); \
286			sum += diff_##ss(next_line, next2_line, xx, yy); \
287			} \
288			\
289			sD[i + rslope] = ecost * sum; \
290			sD[i + rslope] += mcost * cost_##ss(prev_line, next_line, end, x, i);\
291			sD[i + rslope] += dcost * abs(i); \
292			\
293			if (dmin > sD[i + rslope]) { \
294			dmin = sD[i + rslope]; \
295			di = 1; \
296			iD = i; \
297			} \
298			} \
299			\
300			for (int i = -rslope; i <= rslope; i++) { \
301			atype sum = 0; \
302			\
303			for (int j = -redge; j <= redge; j++) { \
304			const int xx = av_clip(x + k + i + j, 0, end); \
305			const int yy = av_clip(x - k - i + j, 0, end); \
306			sum += diff_##ss(prev_line, next_line, xx, yy); \
307			sum += diff_##ss(prev2_line, prev_line, xx, yy); \
308			sum += diff_##ss(next_line, next2_line, xx, yy); \
309			} \
310			\
311			sd[i + rslope] = ecost * sum; \
312			sd[i + rslope] += mcost * cost_##ss(prev_line, next_line, end, x, k+i);\
313			sd[i + rslope] += dcost * abs(k + i); \
314			\
315			if (dmin > sd[i + rslope]) { \
316			dmin = sd[i + rslope]; \
317			di = 0; \
318			id = i; \
319			} \
320			} \
321			\
322			k = di ? iD : k + id; \
323			\
324			dst[x] = s->mid_##ss[interp](prev_line, next_line, \
325			prev2_line, next2_line, \
326			prev3_line, next3_line, \
327			end, x, k, depth); \
328			\
329			*K = k; \
330			}
331
332		✗	INTERPOLATE(uint8_t, unsigned, UINT_MAX, 8)
333		✗	INTERPOLATE(uint16_t, uint64_t, UINT64_MAX, 16)
334
335		✗	static int deinterlace_slice(AVFilterContext *ctx, void *arg,
336			int jobnr, int nb_jobs)
337			{
338		✗	ESTDIFContext *s = ctx->priv;
339		✗	ThreadData *td = arg;
340		✗	AVFrame *out = td->out;
341		✗	AVFrame *in = td->in;
342		✗	const int rslope = s->rslope;
343		✗	const int redge = s->redge;
344		✗	const int depth = s->depth;
345		✗	const int interlaced = !!(in->flags & AV_FRAME_FLAG_INTERLACED);
346		✗	const int tff = (s->field == (s->parity == -1 ? interlaced ? !!(in->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) : 1 :
347		✗	s->parity ^ 1));
348
349		✗	for (int plane = 0; plane < s->nb_planes; plane++) {
350		✗	const uint8_t *src_data = in->data[plane];
351		✗	uint8_t *dst_data = out->data[plane];
352		✗	const int linesize = s->linesize[plane];
353		✗	const int width = s->planewidth[plane];
354		✗	const int height = s->planeheight[plane];
355		✗	const int src_linesize = in->linesize[plane];
356		✗	const int dst_linesize = out->linesize[plane];
357		✗	const int start = (height * jobnr) / nb_jobs;
358		✗	const int end = (height * (jobnr+1)) / nb_jobs;
359			const uint8_t *prev_line, *prev2_line, *next_line, *next2_line, *in_line;
360			const uint8_t *prev3_line, *next3_line;
361			uint8_t *out_line;
362			int y_out;
363
364		✗	y_out = start + (tff ^ (start & 1));
365
366		✗	in_line = src_data + (y_out * src_linesize);
367		✗	out_line = dst_data + (y_out * dst_linesize);
368
369		✗	while (y_out < end) {
370		✗	memcpy(out_line, in_line, linesize);
371		✗	y_out += 2;
372		✗	in_line += src_linesize * 2;
373		✗	out_line += dst_linesize * 2;
374			}
375
376		✗	y_out = start + ((!tff) ^ (start & 1));
377		✗	out_line = dst_data + (y_out * dst_linesize);
378
379		✗	for (int y = y_out; y < end; y += 2) {
380		✗	int y_prev3_in = y - 5;
381		✗	int y_next3_in = y + 5;
382		✗	int y_prev2_in = y - 3;
383		✗	int y_next2_in = y + 3;
384		✗	int y_prev_in = y - 1;
385		✗	int y_next_in = y + 1;
386			int k;
387
388		✗	while (y_prev3_in < 0)
389		✗	y_prev3_in += 2;
390
391		✗	while (y_next3_in >= height)
392		✗	y_next3_in -= 2;
393
394		✗	while (y_prev2_in < 0)
395		✗	y_prev2_in += 2;
396
397		✗	while (y_next2_in >= height)
398		✗	y_next2_in -= 2;
399
400		✗	while (y_prev_in < 0)
401		✗	y_prev_in += 2;
402
403		✗	while (y_next_in >= height)
404		✗	y_next_in -= 2;
405
406		✗	prev3_line = src_data + (y_prev3_in * src_linesize);
407		✗	next3_line = src_data + (y_next3_in * src_linesize);
408
409		✗	prev2_line = src_data + (y_prev2_in * src_linesize);
410		✗	next2_line = src_data + (y_next2_in * src_linesize);
411
412		✗	prev_line = src_data + (y_prev_in * src_linesize);
413		✗	next_line = src_data + (y_next_in * src_linesize);
414
415		✗	k = 0;
416
417		✗	for (int x = 0; x < width; x++) {
418		✗	s->interpolate(s, out_line,
419			prev_line, next_line,
420			prev2_line, next2_line,
421			prev3_line, next3_line,
422			x, width, rslope, redge, depth, &k);
423			}
424
425		✗	out_line += 2 * dst_linesize;
426			}
427			}
428
429		✗	return 0;
430			}
431
432		✗	static int filter(AVFilterContext *ctx, AVFrame *in, int64_t pts, int64_t duration)
433			{
434		✗	ESTDIFContext *s = ctx->priv;
435		✗	AVFilterLink *outlink = ctx->outputs[0];
436			AVFrame *out;
437			ThreadData td;
438
439		✗	out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
440		✗	if (!out)
441		✗	return AVERROR(ENOMEM);
442		✗	av_frame_copy_props(out, in);
443			#if FF_API_INTERLACED_FRAME
444			FF_DISABLE_DEPRECATION_WARNINGS
445		✗	out->interlaced_frame = 0;
446			FF_ENABLE_DEPRECATION_WARNINGS
447			#endif
448		✗	out->flags &= ~AV_FRAME_FLAG_INTERLACED;
449		✗	out->pts = pts;
450		✗	out->duration = duration;
451
452		✗	td.out = out; td.in = in;
453		✗	ff_filter_execute(ctx, deinterlace_slice, &td, NULL,
454		✗	FFMIN(s->planeheight[1] / 2, s->nb_threads));
455
456		✗	if (s->mode)
457		✗	s->field = !s->field;
458
459		✗	return ff_filter_frame(outlink, out);
460			}
461
462		✗	static int config_input(AVFilterLink *inlink)
463			{
464		✗	AVFilterContext *ctx = inlink->dst;
465		✗	ESTDIFContext *s = ctx->priv;
466		✗	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
467			int ret;
468
469		✗	if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
470		✗	return ret;
471
472		✗	s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
473		✗	s->planeheight[0] = s->planeheight[3] = inlink->h;
474		✗	s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
475		✗	s->planewidth[0] = s->planewidth[3] = inlink->w;
476
477		✗	if (inlink->h < 3) {
478		✗	av_log(ctx, AV_LOG_ERROR, "Video of less than 3 lines is not supported\n");
479		✗	return AVERROR(EINVAL);
480			}
481
482		✗	s->nb_planes = av_pix_fmt_count_planes(inlink->format);
483		✗	s->nb_threads = ff_filter_get_nb_threads(ctx);
484		✗	s->depth = desc->comp[0].depth;
485		✗	s->interpolate = s->depth <= 8 ? interpolate_8 : interpolate_16;
486		✗	s->mid_8[0] = mid2_8;
487		✗	s->mid_8[1] = mid4_8;
488		✗	s->mid_8[2] = mid6_8;
489		✗	s->mid_16[0] = mid2_16;
490		✗	s->mid_16[1] = mid4_16;
491		✗	s->mid_16[2] = mid6_16;
492		✗	s->max = (1 << (s->depth)) - 1;
493
494		✗	return 0;
495			}
496		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *in)
497			{
498		✗	AVFilterContext *ctx = inlink->dst;
499		✗	ESTDIFContext *s = ctx->priv;
500			int ret;
501
502		✗	if (!s->prev) {
503		✗	s->prev = in;
504		✗	return 0;
505			}
506
507		✗	if ((s->deint && !(s->prev->flags & AV_FRAME_FLAG_INTERLACED)) || ctx->is_disabled) {
508		✗	s->prev->pts *= 2;
509		✗	s->prev->duration *= 2;
510		✗	ret = ff_filter_frame(ctx->outputs[0], s->prev);
511		✗	s->prev = in;
512		✗	return ret;
513			}
514
515		✗	ret = filter(ctx, s->prev, s->prev->pts * 2,
516		✗	s->prev->duration * (s->mode ? 1 : 2));
517		✗	if (ret < 0 || s->mode == 0) {
518		✗	av_frame_free(&s->prev);
519		✗	s->prev = in;
520		✗	return ret;
521			}
522
523		✗	ret = filter(ctx, s->prev, s->prev->pts + in->pts, in->duration);
524		✗	av_frame_free(&s->prev);
525		✗	s->prev = in;
526		✗	return ret;
527			}
528
529		✗	static int request_frame(AVFilterLink *link)
530			{
531		✗	FilterLink *l = ff_filter_link(link);
532		✗	AVFilterContext *ctx = link->src;
533		✗	ESTDIFContext *s = ctx->priv;
534			int ret;
535
536		✗	if (s->eof)
537		✗	return AVERROR_EOF;
538
539		✗	ret = ff_request_frame(ctx->inputs[0]);
540
541		✗	if (ret == AVERROR_EOF && s->prev) {
542		✗	AVFrame *next = av_frame_clone(s->prev);
543
544		✗	if (!next)
545		✗	return AVERROR(ENOMEM);
546
547		✗	next->pts = s->prev->pts + av_rescale_q(1, av_inv_q(l->frame_rate),
548		✗	ctx->outputs[0]->time_base);
549		✗	s->eof = 1;
550		✗	ret = filter_frame(ctx->inputs[0], next);
551		✗	} else if (ret < 0) {
552		✗	return ret;
553			}
554
555		✗	return ret;
556			}
557
558		✗	static av_cold void uninit(AVFilterContext *ctx)
559			{
560		✗	ESTDIFContext *s = ctx->priv;
561
562		✗	av_frame_free(&s->prev);
563		✗	}
564
565			static const AVFilterPad estdif_inputs[] = {
566			{
567			.name = "default",
568			.type = AVMEDIA_TYPE_VIDEO,
569			.filter_frame = filter_frame,
570			.config_props = config_input,
571			},
572			};
573
574			static const AVFilterPad estdif_outputs[] = {
575			{
576			.name = "default",
577			.type = AVMEDIA_TYPE_VIDEO,
578			.config_props = config_output,
579			.request_frame = request_frame,
580			},
581			};
582
583			const AVFilter ff_vf_estdif = {
584			.name = "estdif",
585			.description = NULL_IF_CONFIG_SMALL("Apply Edge Slope Tracing deinterlace."),
586			.priv_size = sizeof(ESTDIFContext),
587			.priv_class = &estdif_class,
588			.uninit = uninit,
589			FILTER_INPUTS(estdif_inputs),
590			FILTER_OUTPUTS(estdif_outputs),
591			FILTER_PIXFMTS_ARRAY(pix_fmts),
592			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
593			.process_command = ff_filter_process_command,
594			};
595