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vf_tinterlace.c
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1 /*
2  * Copyright (c) 2017 Thomas Mundt <tmundt75@gmail.com>
3  * Copyright (c) 2011 Stefano Sabatini
4  * Copyright (c) 2010 Baptiste Coudurier
5  * Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with FFmpeg if not, write to the Free Software Foundation, Inc.,
21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22  */
23 
24 /**
25  * @file
26  * temporal field interlace filter, ported from MPlayer/libmpcodecs
27  */
28 
29 #include "libavutil/opt.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/avassert.h"
32 #include "avfilter.h"
33 #include "internal.h"
34 #include "tinterlace.h"
35 
36 #define OFFSET(x) offsetof(TInterlaceContext, x)
37 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
38 
39 static const AVOption tinterlace_options[] = {
40  {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"},
41  {"merge", "merge fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE}, INT_MIN, INT_MAX, FLAGS, "mode"},
42  {"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"},
43  {"drop_odd", "drop odd fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_ODD}, INT_MIN, INT_MAX, FLAGS, "mode"},
44  {"pad", "pad alternate lines with black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PAD}, INT_MIN, INT_MAX, FLAGS, "mode"},
45  {"interleave_top", "interleave top and bottom fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, "mode"},
46  {"interleave_bottom", "interleave bottom and top fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "mode"},
47  {"interlacex2", "interlace fields from two consecutive frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLACEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
48  {"mergex2", "merge fields keeping same frame rate", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
49 
50  {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
51  {"low_pass_filter", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
52  {"vlpf", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
53  {"complex_filter", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
54  {"cvlpf", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
55  {"exact_tb", "force a timebase which can represent timestamps exactly", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_EXACT_TB}, INT_MIN, INT_MAX, FLAGS, "flags" },
56 
57  {NULL}
58 };
59 
60 AVFILTER_DEFINE_CLASS(tinterlace);
61 
62 static const AVOption interlace_options[] = {
63  { "scan", "scanning mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_INTERLEAVE_TOP}, 0, MODE_NB-1, FLAGS, "mode"},
64  { "tff", "top field first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
65  { "bff", "bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, .unit = "mode"},
66  { "lowpass", "set vertical low-pass filter", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = TINTERLACE_FLAG_VLPF}, 0,INT_MAX, 0, "flags" },
67  { "off", "disable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, FLAGS, "flags" },
68  { "linear", "linear vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
69  { "complex", "complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
70 
71  { NULL }
72 };
73 
74 AVFILTER_DEFINE_CLASS(interlace);
75 
76 #define FULL_SCALE_YUVJ_FORMATS \
77  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
78 
79 static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = {
81 };
82 
83 static const AVRational standard_tbs[] = {
84  {1, 25},
85  {1, 30},
86  {1001, 30000},
87 };
88 
90 {
91  static const enum AVPixelFormat pix_fmts[] = {
103  };
104 
105  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
106  if (!fmts_list)
107  return AVERROR(ENOMEM);
108  return ff_set_common_formats(ctx, fmts_list);
109 }
110 
111 static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
112  ptrdiff_t mref, ptrdiff_t pref, int clip_max)
113 {
114  const uint8_t *srcp_above = srcp + mref;
115  const uint8_t *srcp_below = srcp + pref;
116  int i;
117  for (i = 0; i < width; i++) {
118  // this calculation is an integer representation of
119  // '0.5 * current + 0.25 * above + 0.25 * below'
120  // '1 +' is for rounding.
121  dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
122  }
123 }
124 
125 static void lowpass_line_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
126  ptrdiff_t mref, ptrdiff_t pref, int clip_max)
127 {
128  uint16_t *dstp = (uint16_t *)dst8;
129  const uint16_t *srcp = (const uint16_t *)src8;
130  const uint16_t *srcp_above = srcp + mref / 2;
131  const uint16_t *srcp_below = srcp + pref / 2;
132  int i, src_x;
133  for (i = 0; i < width; i++) {
134  // this calculation is an integer representation of
135  // '0.5 * current + 0.25 * above + 0.25 * below'
136  // '1 +' is for rounding.
137  src_x = av_le2ne16(srcp[i]) << 1;
138  dstp[i] = av_le2ne16((1 + src_x + av_le2ne16(srcp_above[i])
139  + av_le2ne16(srcp_below[i])) >> 2);
140  }
141 }
142 
143 static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
144  ptrdiff_t mref, ptrdiff_t pref, int clip_max)
145 {
146  const uint8_t *srcp_above = srcp + mref;
147  const uint8_t *srcp_below = srcp + pref;
148  const uint8_t *srcp_above2 = srcp + mref * 2;
149  const uint8_t *srcp_below2 = srcp + pref * 2;
150  int i, src_x, src_ab;
151  for (i = 0; i < width; i++) {
152  // this calculation is an integer representation of
153  // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
154  // '4 +' is for rounding.
155  src_x = srcp[i] << 1;
156  src_ab = srcp_above[i] + srcp_below[i];
157  dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1)
158  - srcp_above2[i] - srcp_below2[i]) >> 3);
159  // Prevent over-sharpening:
160  // dst must not exceed src when the average of above and below
161  // is less than src. And the other way around.
162  if (src_ab > src_x) {
163  if (dstp[i] < srcp[i])
164  dstp[i] = srcp[i];
165  } else if (dstp[i] > srcp[i])
166  dstp[i] = srcp[i];
167  }
168 }
169 
170 static void lowpass_line_complex_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
171  ptrdiff_t mref, ptrdiff_t pref, int clip_max)
172 {
173  uint16_t *dstp = (uint16_t *)dst8;
174  const uint16_t *srcp = (const uint16_t *)src8;
175  const uint16_t *srcp_above = srcp + mref / 2;
176  const uint16_t *srcp_below = srcp + pref / 2;
177  const uint16_t *srcp_above2 = srcp + mref;
178  const uint16_t *srcp_below2 = srcp + pref;
179  int i, dst_le, src_le, src_x, src_ab;
180  for (i = 0; i < width; i++) {
181  // this calculation is an integer representation of
182  // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
183  // '4 +' is for rounding.
184  src_le = av_le2ne16(srcp[i]);
185  src_x = src_le << 1;
186  src_ab = av_le2ne16(srcp_above[i]) + av_le2ne16(srcp_below[i]);
187  dst_le = av_clip((4 + ((src_le + src_x + src_ab) << 1)
188  - av_le2ne16(srcp_above2[i])
189  - av_le2ne16(srcp_below2[i])) >> 3, 0, clip_max);
190  // Prevent over-sharpening:
191  // dst must not exceed src when the average of above and below
192  // is less than src. And the other way around.
193  if (src_ab > src_x) {
194  if (dst_le < src_le)
195  dstp[i] = av_le2ne16(src_le);
196  else
197  dstp[i] = av_le2ne16(dst_le);
198  } else if (dst_le > src_le) {
199  dstp[i] = av_le2ne16(src_le);
200  } else
201  dstp[i] = av_le2ne16(dst_le);
202  }
203 }
204 
206 {
207  TInterlaceContext *tinterlace = ctx->priv;
208 
209  av_frame_free(&tinterlace->cur );
210  av_frame_free(&tinterlace->next);
211  av_freep(&tinterlace->black_data[0]);
212 }
213 
214 static int config_out_props(AVFilterLink *outlink)
215 {
216  AVFilterContext *ctx = outlink->src;
217  AVFilterLink *inlink = outlink->src->inputs[0];
219  TInterlaceContext *tinterlace = ctx->priv;
220  int i;
221 
222  tinterlace->vsub = desc->log2_chroma_h;
223  outlink->w = inlink->w;
224  outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2?
225  inlink->h*2 : inlink->h;
226  if (tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2)
228  av_make_q(2, 1));
229 
230  if (tinterlace->mode == MODE_PAD) {
231  uint8_t black[4] = { 0, 0, 0, 16 };
232  int ret;
233  ff_draw_init(&tinterlace->draw, outlink->format, 0);
234  ff_draw_color(&tinterlace->draw, &tinterlace->color, black);
236  tinterlace->color.comp[0].u8[0] = 0;
237  ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
238  outlink->w, outlink->h, outlink->format, 16);
239  if (ret < 0)
240  return ret;
241 
242  ff_fill_rectangle(&tinterlace->draw, &tinterlace->color, tinterlace->black_data,
243  tinterlace->black_linesize, 0, 0, outlink->w, outlink->h);
244  }
245  if (tinterlace->flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)
246  && !(tinterlace->mode == MODE_INTERLEAVE_TOP
247  || tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) {
248  av_log(ctx, AV_LOG_WARNING, "low_pass_filter flags ignored with mode %d\n",
249  tinterlace->mode);
251  }
252  tinterlace->preout_time_base = inlink->time_base;
253  if (tinterlace->mode == MODE_INTERLACEX2) {
254  tinterlace->preout_time_base.den *= 2;
255  outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1});
256  outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2});
257  } else if (tinterlace->mode == MODE_MERGEX2) {
258  outlink->frame_rate = inlink->frame_rate;
259  outlink->time_base = inlink->time_base;
260  } else if (tinterlace->mode != MODE_PAD) {
261  outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2});
262  outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1});
263  }
264 
265  for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){
266  if (!av_cmp_q(standard_tbs[i], outlink->time_base))
267  break;
268  }
269  if (i == FF_ARRAY_ELEMS(standard_tbs) ||
270  (tinterlace->flags & TINTERLACE_FLAG_EXACT_TB))
271  outlink->time_base = tinterlace->preout_time_base;
272 
273  tinterlace->csp = av_pix_fmt_desc_get(outlink->format);
274  if (tinterlace->flags & TINTERLACE_FLAG_CVLPF) {
275  if (tinterlace->csp->comp[0].depth > 8)
276  tinterlace->lowpass_line = lowpass_line_complex_c_16;
277  else
278  tinterlace->lowpass_line = lowpass_line_complex_c;
279  if (ARCH_X86)
280  ff_tinterlace_init_x86(tinterlace);
281  } else if (tinterlace->flags & TINTERLACE_FLAG_VLPF) {
282  if (tinterlace->csp->comp[0].depth > 8)
283  tinterlace->lowpass_line = lowpass_line_c_16;
284  else
285  tinterlace->lowpass_line = lowpass_line_c;
286  if (ARCH_X86)
287  ff_tinterlace_init_x86(tinterlace);
288  }
289 
290  av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n", tinterlace->mode,
291  (tinterlace->flags & TINTERLACE_FLAG_CVLPF) ? "complex" :
292  (tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "linear" : "off",
293  inlink->h, outlink->h);
294 
295  return 0;
296 }
297 
298 #define FIELD_UPPER 0
299 #define FIELD_LOWER 1
300 #define FIELD_UPPER_AND_LOWER 2
301 
302 /**
303  * Copy picture field from src to dst.
304  *
305  * @param src_field copy from upper, lower field or both
306  * @param interleave leave a padding line between each copied line
307  * @param dst_field copy to upper or lower field,
308  * only meaningful when interleave is selected
309  * @param flags context flags
310  */
311 static inline
313  uint8_t *dst[4], int dst_linesize[4],
314  const uint8_t *src[4], int src_linesize[4],
315  enum AVPixelFormat format, int w, int src_h,
316  int src_field, int interleave, int dst_field,
317  int flags)
318 {
320  int hsub = desc->log2_chroma_w;
321  int plane, vsub = desc->log2_chroma_h;
322  int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
323  int h;
324 
325  for (plane = 0; plane < desc->nb_components; plane++) {
326  int lines = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(src_h, vsub) : src_h;
327  int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w;
328  uint8_t *dstp = dst[plane];
329  const uint8_t *srcp = src[plane];
330  int srcp_linesize = src_linesize[plane] * k;
331  int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
332  int clip_max = (1 << tinterlace->csp->comp[plane].depth) - 1;
333 
334  lines = (lines + (src_field == FIELD_UPPER)) / k;
335  if (src_field == FIELD_LOWER)
336  srcp += src_linesize[plane];
337  if (interleave && dst_field == FIELD_LOWER)
338  dstp += dst_linesize[plane];
339  // Low-pass filtering is required when creating an interlaced destination from
340  // a progressive source which contains high-frequency vertical detail.
341  // Filtering will reduce interlace 'twitter' and Moire patterning.
343  int x = !!(flags & TINTERLACE_FLAG_CVLPF);
344  for (h = lines; h > 0; h--) {
345  ptrdiff_t pref = src_linesize[plane];
346  ptrdiff_t mref = -pref;
347  if (h >= (lines - x)) mref = 0; // there is no line above
348  else if (h <= (1 + x)) pref = 0; // there is no line below
349 
350  tinterlace->lowpass_line(dstp, cols, srcp, mref, pref, clip_max);
351  dstp += dstp_linesize;
352  srcp += srcp_linesize;
353  }
354  } else {
355  if (tinterlace->csp->comp[plane].depth > 8)
356  cols *= 2;
357  av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines);
358  }
359  }
360 }
361 
362 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
363 {
364  AVFilterContext *ctx = inlink->dst;
365  AVFilterLink *outlink = ctx->outputs[0];
366  TInterlaceContext *tinterlace = ctx->priv;
367  AVFrame *cur, *next, *out;
368  int field, tff, ret;
369 
370  av_frame_free(&tinterlace->cur);
371  tinterlace->cur = tinterlace->next;
372  tinterlace->next = picref;
373 
374  cur = tinterlace->cur;
375  next = tinterlace->next;
376  /* we need at least two frames */
377  if (!tinterlace->cur)
378  return 0;
379 
380  switch (tinterlace->mode) {
381  case MODE_MERGEX2: /* move the odd frame into the upper field of the new image, even into
382  * the lower field, generating a double-height video at same framerate */
383  case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
384  * the lower field, generating a double-height video at half framerate */
385  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
386  if (!out)
387  return AVERROR(ENOMEM);
388  av_frame_copy_props(out, cur);
389  out->height = outlink->h;
390  out->interlaced_frame = 1;
391  out->top_field_first = 1;
393 
394  /* write odd frame lines into the upper field of the new frame */
395  copy_picture_field(tinterlace, out->data, out->linesize,
396  (const uint8_t **)cur->data, cur->linesize,
397  inlink->format, inlink->w, inlink->h,
398  FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_LOWER : FIELD_UPPER : FIELD_UPPER, tinterlace->flags);
399  /* write even frame lines into the lower field of the new frame */
400  copy_picture_field(tinterlace, out->data, out->linesize,
401  (const uint8_t **)next->data, next->linesize,
402  inlink->format, inlink->w, inlink->h,
403  FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_UPPER : FIELD_LOWER : FIELD_LOWER, tinterlace->flags);
404  if (tinterlace->mode != MODE_MERGEX2)
405  av_frame_free(&tinterlace->next);
406  break;
407 
408  case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
409  case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
410  out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);
411  if (!out)
412  return AVERROR(ENOMEM);
413  av_frame_free(&tinterlace->next);
414  break;
415 
416  case MODE_PAD: /* expand each frame to double height, but pad alternate
417  * lines with black; framerate unchanged */
418  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
419  if (!out)
420  return AVERROR(ENOMEM);
421  av_frame_copy_props(out, cur);
422  out->height = outlink->h;
424 
425  field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
426  /* copy upper and lower fields */
427  copy_picture_field(tinterlace, out->data, out->linesize,
428  (const uint8_t **)cur->data, cur->linesize,
429  inlink->format, inlink->w, inlink->h,
430  FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags);
431  /* pad with black the other field */
432  copy_picture_field(tinterlace, out->data, out->linesize,
433  (const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
434  inlink->format, inlink->w, inlink->h,
435  FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags);
436  break;
437 
438  /* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
439  * halving the frame rate and preserving image height */
440  case MODE_INTERLEAVE_TOP: /* top field first */
441  case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
442  tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
443  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
444  if (!out)
445  return AVERROR(ENOMEM);
446  av_frame_copy_props(out, cur);
447  out->interlaced_frame = 1;
448  out->top_field_first = tff;
449 
450  /* copy upper/lower field from cur */
451  copy_picture_field(tinterlace, out->data, out->linesize,
452  (const uint8_t **)cur->data, cur->linesize,
453  inlink->format, inlink->w, inlink->h,
454  tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
455  tinterlace->flags);
456  /* copy lower/upper field from next */
457  copy_picture_field(tinterlace, out->data, out->linesize,
458  (const uint8_t **)next->data, next->linesize,
459  inlink->format, inlink->w, inlink->h,
460  tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
461  tinterlace->flags);
462  av_frame_free(&tinterlace->next);
463  break;
464  case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
465  /* output current frame first */
466  out = av_frame_clone(cur);
467  if (!out)
468  return AVERROR(ENOMEM);
469  out->interlaced_frame = 1;
470  if (cur->pts != AV_NOPTS_VALUE)
471  out->pts = cur->pts*2;
472 
473  out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
474  if ((ret = ff_filter_frame(outlink, out)) < 0)
475  return ret;
476 
477  /* output mix of current and next frame */
478  tff = next->top_field_first;
479  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
480  if (!out)
481  return AVERROR(ENOMEM);
482  av_frame_copy_props(out, next);
483  out->interlaced_frame = 1;
484  out->top_field_first = !tff;
485 
486  if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE)
487  out->pts = cur->pts + next->pts;
488  else
489  out->pts = AV_NOPTS_VALUE;
490  /* write current frame second field lines into the second field of the new frame */
491  copy_picture_field(tinterlace, out->data, out->linesize,
492  (const uint8_t **)cur->data, cur->linesize,
493  inlink->format, inlink->w, inlink->h,
494  tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
495  tinterlace->flags);
496  /* write next frame first field lines into the first field of the new frame */
497  copy_picture_field(tinterlace, out->data, out->linesize,
498  (const uint8_t **)next->data, next->linesize,
499  inlink->format, inlink->w, inlink->h,
500  tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
501  tinterlace->flags);
502  break;
503  default:
504  av_assert0(0);
505  }
506 
507  out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
508  ret = ff_filter_frame(outlink, out);
509  tinterlace->frame++;
510 
511  return ret;
512 }
513 
514 static const AVFilterPad tinterlace_inputs[] = {
515  {
516  .name = "default",
517  .type = AVMEDIA_TYPE_VIDEO,
518  .filter_frame = filter_frame,
519  },
520  { NULL }
521 };
522 
523 static const AVFilterPad tinterlace_outputs[] = {
524  {
525  .name = "default",
526  .type = AVMEDIA_TYPE_VIDEO,
527  .config_props = config_out_props,
528  },
529  { NULL }
530 };
531 
533  .name = "tinterlace",
534  .description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
535  .priv_size = sizeof(TInterlaceContext),
536  .uninit = uninit,
538  .inputs = tinterlace_inputs,
539  .outputs = tinterlace_outputs,
540  .priv_class = &tinterlace_class,
541 };
542 
543 
545  .name = "interlace",
546  .description = NULL_IF_CONFIG_SMALL("Convert progressive video into interlaced."),
547  .priv_size = sizeof(TInterlaceContext),
548  .uninit = uninit,
550  .inputs = tinterlace_inputs,
551  .outputs = tinterlace_outputs,
552  .priv_class = &interlace_class,
553 };
int plane
Definition: avisynth_c.h:422
#define NULL
Definition: coverity.c:32
planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
Definition: pixfmt.h:271
static enum AVPixelFormat full_scale_yuvj_pix_fmts[]
Definition: vf_tinterlace.c:79
static int query_formats(AVFilterContext *ctx)
Definition: vf_tinterlace.c:89
static const char * format[]
Definition: af_aiir.c:311
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2384
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
#define OFFSET(x)
Definition: vf_tinterlace.c:36
AVOption.
Definition: opt.h:246
planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:155
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define TINTERLACE_FLAG_CVLPF
Definition: tinterlace.h:38
static void lowpass_line_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8, ptrdiff_t mref, ptrdiff_t pref, int clip_max)
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:65
AVFrame * next
Definition: tinterlace.h:60
int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...
Definition: imgutils.c:192
#define FIELD_LOWER
static const AVOption interlace_options[]
Definition: vf_tinterlace.c:62
planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
Definition: pixfmt.h:185
int mode
TInterlaceMode, interlace mode selected.
Definition: tinterlace.h:54
FFDrawContext draw
Definition: tinterlace.h:63
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
#define src
Definition: vp8dsp.c:254
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
int flags
flags affecting interlacing algorithm
Definition: tinterlace.h:56
AVFilter ff_vf_tinterlace
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#define FULL_SCALE_YUVJ_FORMATS
Definition: vf_tinterlace.c:76
BYTE int const BYTE * srcp
Definition: avisynth_c.h:813
const char * name
Pad name.
Definition: internal.h:60
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
Definition: vf_il.c:117
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:97
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
AVFilter ff_vf_interlace
static const AVOption tinterlace_options[]
Definition: vf_tinterlace.c:39
temporal field interlace filter, ported from MPlayer/libmpcodecs
AVOptions.
planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:247
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:311
int frame
number of the output frame
Definition: tinterlace.h:57
int black_linesize[4]
Definition: tinterlace.h:62
static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, ptrdiff_t mref, ptrdiff_t pref, int clip_max)
static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, ptrdiff_t mref, ptrdiff_t pref, int clip_max)
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
static void lowpass_line_complex_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8, ptrdiff_t mref, ptrdiff_t pref, int clip_max)
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:365
#define flags(name, subs,...)
Definition: cbs_h2645.c:263
int ff_fmt_is_in(int fmt, const int *fmts)
Tell if an integer is contained in the provided -1-terminated list of integers.
Definition: formats.c:254
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
Definition: pixfmt.h:161
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:172
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void ff_tinterlace_init_x86(TInterlaceContext *interlace)
int vsub
chroma vertical subsampling
Definition: tinterlace.h:58
BYTE * dstp
Definition: avisynth_c.h:813
#define AVERROR(e)
Definition: error.h:43
#define TINTERLACE_FLAG_VLPF
Definition: tinterlace.h:36
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define FLAGS
Definition: vf_tinterlace.c:37
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:231
planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:157
uint16_t width
Definition: gdv.c:47
static void copy_picture_field(TInterlaceContext *tinterlace, uint8_t *dst[4], int dst_linesize[4], const uint8_t *src[4], int src_linesize[4], enum AVPixelFormat format, int w, int src_h, int src_field, int interleave, int dst_field, int flags)
Copy picture field from src to dst.
simple assert() macros that are a bit more flexible than ISO C assert().
uint8_t u8[16]
Definition: drawutils.h:67
AVFILTER_DEFINE_CLASS(tinterlace)
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
#define FIELD_UPPER
static av_cold void uninit(AVFilterContext *ctx)
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext * ctx
Definition: movenc.c:48
planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
Definition: pixfmt.h:239
static const AVFilterPad tinterlace_outputs[]
static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVRational standard_tbs[]
Definition: vf_tinterlace.c:83
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:538
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define FF_ARRAY_ELEMS(a)
#define av_le2ne16(x)
Definition: bswap.h:95
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:173
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
FFDrawColor color
Definition: tinterlace.h:64
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:306
planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
Definition: pixfmt.h:273
uint8_t * black_data[4]
buffer used to fill padded lines
Definition: tinterlace.h:61
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
const char * name
Filter name.
Definition: avfilter.h:148
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:178
void(* lowpass_line)(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, ptrdiff_t mref, ptrdiff_t pref, int clip_max)
Definition: tinterlace.h:66
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
AVFrame * cur
Definition: tinterlace.h:59
static const AVFilterPad tinterlace_inputs[]
planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
Definition: pixfmt.h:183
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
union FFDrawColor::@189 comp[MAX_PLANES]
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
Definition: pixfmt.h:243
Y , 8bpp.
Definition: pixfmt.h:70
const AVPixFmtDescriptor * csp
Definition: tinterlace.h:65
static int config_out_props(AVFilterLink *outlink)
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
int den
Denominator.
Definition: rational.h:60
planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
Definition: pixfmt.h:181
#define TINTERLACE_FLAG_EXACT_TB
Definition: tinterlace.h:37
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:370
A list of supported formats for one end of a filter link.
Definition: formats.h:64
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:318
An instance of a filter.
Definition: avfilter.h:338
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
int height
Definition: frame.h:276
FILE * out
Definition: movenc.c:54
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:95
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
internal API functions
#define FIELD_UPPER_AND_LOWER
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVRational preout_time_base
Definition: tinterlace.h:55
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:652
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58