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vf_yadif.c
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1 /*
2  * Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
3  * 2010 James Darnley <james.darnley@gmail.com>
4  *
5  * FFmpeg is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * FFmpeg is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with FFmpeg; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 
20 #include "libavutil/avassert.h"
21 #include "libavutil/cpu.h"
22 #include "libavutil/common.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
25 #include "libavutil/imgutils.h"
26 #include "avfilter.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "video.h"
30 #include "yadif.h"
31 
32 typedef struct ThreadData {
33  AVFrame *frame;
34  int plane;
35  int w, h;
36  int parity;
37  int tff;
38 } ThreadData;
39 
40 #define CHECK(j)\
41  { int score = FFABS(cur[mrefs - 1 + (j)] - cur[prefs - 1 - (j)])\
42  + FFABS(cur[mrefs +(j)] - cur[prefs -(j)])\
43  + FFABS(cur[mrefs + 1 + (j)] - cur[prefs + 1 - (j)]);\
44  if (score < spatial_score) {\
45  spatial_score= score;\
46  spatial_pred= (cur[mrefs +(j)] + cur[prefs -(j)])>>1;\
47 
48 /* The is_not_edge argument here controls when the code will enter a branch
49  * which reads up to and including x-3 and x+3. */
50 
51 #define FILTER(start, end, is_not_edge) \
52  for (x = start; x < end; x++) { \
53  int c = cur[mrefs]; \
54  int d = (prev2[0] + next2[0])>>1; \
55  int e = cur[prefs]; \
56  int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
57  int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e) )>>1; \
58  int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
59  int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
60  int spatial_pred = (c+e) >> 1; \
61  \
62  if (is_not_edge) {\
63  int spatial_score = FFABS(cur[mrefs - 1] - cur[prefs - 1]) + FFABS(c-e) \
64  + FFABS(cur[mrefs + 1] - cur[prefs + 1]) - 1; \
65  CHECK(-1) CHECK(-2) }} }} \
66  CHECK( 1) CHECK( 2) }} }} \
67  }\
68  \
69  if (!(mode&2)) { \
70  int b = (prev2[2 * mrefs] + next2[2 * mrefs])>>1; \
71  int f = (prev2[2 * prefs] + next2[2 * prefs])>>1; \
72  int max = FFMAX3(d - e, d - c, FFMIN(b - c, f - e)); \
73  int min = FFMIN3(d - e, d - c, FFMAX(b - c, f - e)); \
74  \
75  diff = FFMAX3(diff, min, -max); \
76  } \
77  \
78  if (spatial_pred > d + diff) \
79  spatial_pred = d + diff; \
80  else if (spatial_pred < d - diff) \
81  spatial_pred = d - diff; \
82  \
83  dst[0] = spatial_pred; \
84  \
85  dst++; \
86  cur++; \
87  prev++; \
88  next++; \
89  prev2++; \
90  next2++; \
91  }
92 
93 static void filter_line_c(void *dst1,
94  void *prev1, void *cur1, void *next1,
95  int w, int prefs, int mrefs, int parity, int mode)
96 {
97  uint8_t *dst = dst1;
98  uint8_t *prev = prev1;
99  uint8_t *cur = cur1;
100  uint8_t *next = next1;
101  int x;
102  uint8_t *prev2 = parity ? prev : cur ;
103  uint8_t *next2 = parity ? cur : next;
104 
105  /* The function is called with the pointers already pointing to data[3] and
106  * with 6 subtracted from the width. This allows the FILTER macro to be
107  * called so that it processes all the pixels normally. A constant value of
108  * true for is_not_edge lets the compiler ignore the if statement. */
109  FILTER(0, w, 1)
110 }
111 
112 #define MAX_ALIGN 8
113 static void filter_edges(void *dst1, void *prev1, void *cur1, void *next1,
114  int w, int prefs, int mrefs, int parity, int mode)
115 {
116  uint8_t *dst = dst1;
117  uint8_t *prev = prev1;
118  uint8_t *cur = cur1;
119  uint8_t *next = next1;
120  int x;
121  uint8_t *prev2 = parity ? prev : cur ;
122  uint8_t *next2 = parity ? cur : next;
123 
124  /* Only edge pixels need to be processed here. A constant value of false
125  * for is_not_edge should let the compiler ignore the whole branch. */
126  FILTER(0, 3, 0)
127 
128  dst = (uint8_t*)dst1 + w - (MAX_ALIGN-1);
129  prev = (uint8_t*)prev1 + w - (MAX_ALIGN-1);
130  cur = (uint8_t*)cur1 + w - (MAX_ALIGN-1);
131  next = (uint8_t*)next1 + w - (MAX_ALIGN-1);
132  prev2 = (uint8_t*)(parity ? prev : cur);
133  next2 = (uint8_t*)(parity ? cur : next);
134 
135  FILTER(w - (MAX_ALIGN-1), w - 3, 1)
136  FILTER(w - 3, w, 0)
137 }
138 
139 
140 static void filter_line_c_16bit(void *dst1,
141  void *prev1, void *cur1, void *next1,
142  int w, int prefs, int mrefs, int parity,
143  int mode)
144 {
145  uint16_t *dst = dst1;
146  uint16_t *prev = prev1;
147  uint16_t *cur = cur1;
148  uint16_t *next = next1;
149  int x;
150  uint16_t *prev2 = parity ? prev : cur ;
151  uint16_t *next2 = parity ? cur : next;
152  mrefs /= 2;
153  prefs /= 2;
154 
155  FILTER(0, w, 1)
156 }
157 
158 static void filter_edges_16bit(void *dst1, void *prev1, void *cur1, void *next1,
159  int w, int prefs, int mrefs, int parity, int mode)
160 {
161  uint16_t *dst = dst1;
162  uint16_t *prev = prev1;
163  uint16_t *cur = cur1;
164  uint16_t *next = next1;
165  int x;
166  uint16_t *prev2 = parity ? prev : cur ;
167  uint16_t *next2 = parity ? cur : next;
168  mrefs /= 2;
169  prefs /= 2;
170 
171  FILTER(0, 3, 0)
172 
173  dst = (uint16_t*)dst1 + w - (MAX_ALIGN/2-1);
174  prev = (uint16_t*)prev1 + w - (MAX_ALIGN/2-1);
175  cur = (uint16_t*)cur1 + w - (MAX_ALIGN/2-1);
176  next = (uint16_t*)next1 + w - (MAX_ALIGN/2-1);
177  prev2 = (uint16_t*)(parity ? prev : cur);
178  next2 = (uint16_t*)(parity ? cur : next);
179 
180  FILTER(w - (MAX_ALIGN/2-1), w - 3, 1)
181  FILTER(w - 3, w, 0)
182 }
183 
184 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
185 {
186  YADIFContext *s = ctx->priv;
187  ThreadData *td = arg;
188  int refs = s->cur->linesize[td->plane];
189  int df = (s->csp->comp[td->plane].depth_minus1 + 8) / 8;
190  int pix_3 = 3 * df;
191  int slice_start = (td->h * jobnr ) / nb_jobs;
192  int slice_end = (td->h * (jobnr+1)) / nb_jobs;
193  int y;
194 
195  /* filtering reads 3 pixels to the left/right; to avoid invalid reads,
196  * we need to call the c variant which avoids this for border pixels
197  */
198  for (y = slice_start; y < slice_end; y++) {
199  if ((y ^ td->parity) & 1) {
200  uint8_t *prev = &s->prev->data[td->plane][y * refs];
201  uint8_t *cur = &s->cur ->data[td->plane][y * refs];
202  uint8_t *next = &s->next->data[td->plane][y * refs];
203  uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]];
204  int mode = y == 1 || y + 2 == td->h ? 2 : s->mode;
205  s->filter_line(dst + pix_3, prev + pix_3, cur + pix_3,
206  next + pix_3, td->w - (3 + MAX_ALIGN/df-1),
207  y + 1 < td->h ? refs : -refs,
208  y ? -refs : refs,
209  td->parity ^ td->tff, mode);
210  s->filter_edges(dst, prev, cur, next, td->w,
211  y + 1 < td->h ? refs : -refs,
212  y ? -refs : refs,
213  td->parity ^ td->tff, mode);
214  } else {
215  memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]],
216  &s->cur->data[td->plane][y * refs], td->w * df);
217  }
218  }
219  return 0;
220 }
221 
222 static void filter(AVFilterContext *ctx, AVFrame *dstpic,
223  int parity, int tff)
224 {
225  YADIFContext *yadif = ctx->priv;
226  ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff };
227  int i;
228 
229  for (i = 0; i < yadif->csp->nb_components; i++) {
230  int w = dstpic->width;
231  int h = dstpic->height;
232 
233  if (i == 1 || i == 2) {
234  w = FF_CEIL_RSHIFT(w, yadif->csp->log2_chroma_w);
235  h = FF_CEIL_RSHIFT(h, yadif->csp->log2_chroma_h);
236  }
237 
238 
239  td.w = w;
240  td.h = h;
241  td.plane = i;
242 
243  ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(h, ctx->graph->nb_threads));
244  }
245 
246  emms_c();
247 }
248 
249 static int return_frame(AVFilterContext *ctx, int is_second)
250 {
251  YADIFContext *yadif = ctx->priv;
252  AVFilterLink *link = ctx->outputs[0];
253  int tff, ret;
254 
255  if (yadif->parity == -1) {
256  tff = yadif->cur->interlaced_frame ?
257  yadif->cur->top_field_first : 1;
258  } else {
259  tff = yadif->parity ^ 1;
260  }
261 
262  if (is_second) {
263  yadif->out = ff_get_video_buffer(link, link->w, link->h);
264  if (!yadif->out)
265  return AVERROR(ENOMEM);
266 
267  av_frame_copy_props(yadif->out, yadif->cur);
268  yadif->out->interlaced_frame = 0;
269  }
270 
271  filter(ctx, yadif->out, tff ^ !is_second, tff);
272 
273  if (is_second) {
274  int64_t cur_pts = yadif->cur->pts;
275  int64_t next_pts = yadif->next->pts;
276 
277  if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
278  yadif->out->pts = cur_pts + next_pts;
279  } else {
280  yadif->out->pts = AV_NOPTS_VALUE;
281  }
282  }
283  ret = ff_filter_frame(ctx->outputs[0], yadif->out);
284 
285  yadif->frame_pending = (yadif->mode&1) && !is_second;
286  return ret;
287 }
288 
289 static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
290 {
291  int i;
292  for (i = 0; i < yadif->csp->nb_components; i++)
293  if (a->linesize[i] != b->linesize[i])
294  return 1;
295  return 0;
296 }
297 
298 static void fixstride(AVFilterLink *link, AVFrame *f)
299 {
300  AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
301  if(!dst)
302  return;
303  av_frame_copy_props(dst, f);
304  av_image_copy(dst->data, dst->linesize,
305  (const uint8_t **)f->data, f->linesize,
306  dst->format, dst->width, dst->height);
307  av_frame_unref(f);
308  av_frame_move_ref(f, dst);
309  av_frame_free(&dst);
310 }
311 
312 static int filter_frame(AVFilterLink *link, AVFrame *frame)
313 {
314  AVFilterContext *ctx = link->dst;
315  YADIFContext *yadif = ctx->priv;
316 
317  av_assert0(frame);
318 
319  if (yadif->frame_pending)
320  return_frame(ctx, 1);
321 
322  if (yadif->prev)
323  av_frame_free(&yadif->prev);
324  yadif->prev = yadif->cur;
325  yadif->cur = yadif->next;
326  yadif->next = frame;
327 
328  if (!yadif->cur)
329  return 0;
330 
331  if (checkstride(yadif, yadif->next, yadif->cur)) {
332  av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
333  fixstride(link, yadif->next);
334  }
335  if (checkstride(yadif, yadif->next, yadif->cur))
336  fixstride(link, yadif->cur);
337  if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
338  fixstride(link, yadif->prev);
339  if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
340  av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
341  return -1;
342  }
343 
344  if ((yadif->deint && !yadif->cur->interlaced_frame) || ctx->is_disabled) {
345  yadif->out = av_frame_clone(yadif->cur);
346  if (!yadif->out)
347  return AVERROR(ENOMEM);
348 
349  av_frame_free(&yadif->prev);
350  if (yadif->out->pts != AV_NOPTS_VALUE)
351  yadif->out->pts *= 2;
352  return ff_filter_frame(ctx->outputs[0], yadif->out);
353  }
354 
355  if (!yadif->prev &&
356  !(yadif->prev = av_frame_clone(yadif->cur)))
357  return AVERROR(ENOMEM);
358 
359  yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
360  if (!yadif->out)
361  return AVERROR(ENOMEM);
362 
363  av_frame_copy_props(yadif->out, yadif->cur);
364  yadif->out->interlaced_frame = 0;
365 
366  if (yadif->out->pts != AV_NOPTS_VALUE)
367  yadif->out->pts *= 2;
368 
369  return return_frame(ctx, 0);
370 }
371 
372 static int request_frame(AVFilterLink *link)
373 {
374  AVFilterContext *ctx = link->src;
375  YADIFContext *yadif = ctx->priv;
376 
377  if (yadif->frame_pending) {
378  return_frame(ctx, 1);
379  return 0;
380  }
381 
382  do {
383  int ret;
384 
385  if (yadif->eof)
386  return AVERROR_EOF;
387 
388  ret = ff_request_frame(link->src->inputs[0]);
389 
390  if (ret == AVERROR_EOF && yadif->cur) {
391  AVFrame *next = av_frame_clone(yadif->next);
392 
393  if (!next)
394  return AVERROR(ENOMEM);
395 
396  next->pts = yadif->next->pts * 2 - yadif->cur->pts;
397 
398  filter_frame(link->src->inputs[0], next);
399  yadif->eof = 1;
400  } else if (ret < 0) {
401  return ret;
402  }
403  } while (!yadif->cur);
404 
405  return 0;
406 }
407 
408 static av_cold void uninit(AVFilterContext *ctx)
409 {
410  YADIFContext *yadif = ctx->priv;
411 
412  av_frame_free(&yadif->prev);
413  av_frame_free(&yadif->cur );
414  av_frame_free(&yadif->next);
415 }
416 
417 static int query_formats(AVFilterContext *ctx)
418 {
419  static const enum AVPixelFormat pix_fmts[] = {
420  AV_PIX_FMT_YUV420P,
421  AV_PIX_FMT_YUV422P,
422  AV_PIX_FMT_YUV444P,
423  AV_PIX_FMT_YUV410P,
424  AV_PIX_FMT_YUV411P,
425  AV_PIX_FMT_GRAY8,
426  AV_PIX_FMT_YUVJ420P,
427  AV_PIX_FMT_YUVJ422P,
428  AV_PIX_FMT_YUVJ444P,
429  AV_PIX_FMT_GRAY16,
430  AV_PIX_FMT_YUV440P,
431  AV_PIX_FMT_YUVJ440P,
432  AV_PIX_FMT_YUV420P9,
433  AV_PIX_FMT_YUV422P9,
434  AV_PIX_FMT_YUV444P9,
435  AV_PIX_FMT_YUV420P10,
436  AV_PIX_FMT_YUV422P10,
437  AV_PIX_FMT_YUV444P10,
438  AV_PIX_FMT_YUV420P12,
439  AV_PIX_FMT_YUV422P12,
440  AV_PIX_FMT_YUV444P12,
441  AV_PIX_FMT_YUV420P14,
442  AV_PIX_FMT_YUV422P14,
443  AV_PIX_FMT_YUV444P14,
444  AV_PIX_FMT_YUV420P16,
445  AV_PIX_FMT_YUV422P16,
446  AV_PIX_FMT_YUV444P16,
447  AV_PIX_FMT_YUVA420P,
448  AV_PIX_FMT_YUVA422P,
449  AV_PIX_FMT_YUVA444P,
450  AV_PIX_FMT_GBRP,
451  AV_PIX_FMT_GBRAP,
452  AV_PIX_FMT_NONE
453  };
454 
455  ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
456 
457  return 0;
458 }
459 
460 static int config_props(AVFilterLink *link)
461 {
462  AVFilterContext *ctx = link->src;
463  YADIFContext *s = link->src->priv;
464 
465  link->time_base.num = link->src->inputs[0]->time_base.num;
466  link->time_base.den = link->src->inputs[0]->time_base.den * 2;
467  link->w = link->src->inputs[0]->w;
468  link->h = link->src->inputs[0]->h;
469 
470  if(s->mode&1)
471  link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});
472 
473  if (link->w < 3 || link->h < 3) {
474  av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
475  return AVERROR(EINVAL);
476  }
477 
478  s->csp = av_pix_fmt_desc_get(link->format);
479  if (s->csp->comp[0].depth_minus1 / 8 == 1) {
480  s->filter_line = filter_line_c_16bit;
481  s->filter_edges = filter_edges_16bit;
482  } else {
483  s->filter_line = filter_line_c;
484  s->filter_edges = filter_edges;
485  }
486 
487  if (ARCH_X86)
488  ff_yadif_init_x86(s);
489 
490  return 0;
491 }
492 
493 
494 #define OFFSET(x) offsetof(YADIFContext, x)
495 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
496 
497 #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
498 
499 static const AVOption yadif_options[] = {
500  { "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, "mode"},
501  CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
502  CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
503  CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
504  CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
505 
506  { "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
507  CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
508  CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
509  CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
510 
511  { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
512  CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
513  CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
514 
515  { NULL }
516 };
517 
518 AVFILTER_DEFINE_CLASS(yadif);
519 
520 static const AVFilterPad avfilter_vf_yadif_inputs[] = {
521  {
522  .name = "default",
523  .type = AVMEDIA_TYPE_VIDEO,
524  .filter_frame = filter_frame,
525  },
526  { NULL }
527 };
528 
529 static const AVFilterPad avfilter_vf_yadif_outputs[] = {
530  {
531  .name = "default",
532  .type = AVMEDIA_TYPE_VIDEO,
533  .request_frame = request_frame,
534  .config_props = config_props,
535  },
536  { NULL }
537 };
538 
539 AVFilter ff_vf_yadif = {
540  .name = "yadif",
541  .description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
542  .priv_size = sizeof(YADIFContext),
543  .priv_class = &yadif_class,
544  .uninit = uninit,
545  .query_formats = query_formats,
546  .inputs = avfilter_vf_yadif_inputs,
547  .outputs = avfilter_vf_yadif_outputs,
548  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
549 };
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