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vf_tinterlace.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
3  * Copyright (c) 2010 Baptiste Coudurier
4  * Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with FFmpeg if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 /**
24  * @file
25  * temporal field interlace filter, ported from MPlayer/libmpcodecs
26  */
27 
28 #include "libavutil/opt.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/avassert.h"
31 #include "avfilter.h"
32 #include "internal.h"
33 #include "tinterlace.h"
34 
35 #define OFFSET(x) offsetof(TInterlaceContext, x)
36 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
37 #define TINTERLACE_FLAG_VLPF 01
38 #define TINTERLACE_FLAG_EXACT_TB 2
39 
40 static const AVOption tinterlace_options[] = {
41  {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"},
42  {"merge", "merge fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE}, INT_MIN, INT_MAX, FLAGS, "mode"},
43  {"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"},
44  {"drop_odd", "drop odd fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_ODD}, INT_MIN, INT_MAX, FLAGS, "mode"},
45  {"pad", "pad alternate lines with black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PAD}, INT_MIN, INT_MAX, FLAGS, "mode"},
46  {"interleave_top", "interleave top and bottom fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, "mode"},
47  {"interleave_bottom", "interleave bottom and top fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "mode"},
48  {"interlacex2", "interlace fields from two consecutive frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLACEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
49  {"mergex2", "merge fields keeping same frame rate", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
50 
51  {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
52  {"low_pass_filter", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
53  {"vlpf", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
54  {"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" },
55 
56  {NULL}
57 };
58 
59 AVFILTER_DEFINE_CLASS(tinterlace);
60 
61 #define FULL_SCALE_YUVJ_FORMATS \
62  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
63 
64 static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = {
66 };
67 
68 static const AVRational standard_tbs[] = {
69  {1, 25},
70  {1, 30},
71  {1001, 30000},
72 };
73 
75 {
76  static const enum AVPixelFormat pix_fmts[] = {
83  };
84 
85  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
86  if (!fmts_list)
87  return AVERROR(ENOMEM);
88  return ff_set_common_formats(ctx, fmts_list);
89 }
90 
91 static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
92  const uint8_t *srcp_above, const uint8_t *srcp_below)
93 {
94  int i;
95  for (i = 0; i < width; i++) {
96  // this calculation is an integer representation of
97  // '0.5 * current + 0.25 * above + 0.25 * below'
98  // '1 +' is for rounding.
99  dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
100  }
101 }
102 
104 {
105  TInterlaceContext *tinterlace = ctx->priv;
106 
107  av_frame_free(&tinterlace->cur );
108  av_frame_free(&tinterlace->next);
109  av_freep(&tinterlace->black_data[0]);
110 }
111 
112 static int config_out_props(AVFilterLink *outlink)
113 {
114  AVFilterContext *ctx = outlink->src;
115  AVFilterLink *inlink = outlink->src->inputs[0];
116  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
117  TInterlaceContext *tinterlace = ctx->priv;
118  int i;
119 
120  tinterlace->vsub = desc->log2_chroma_h;
121  outlink->w = inlink->w;
122  outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2?
123  inlink->h*2 : inlink->h;
124  if (tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2)
126  av_make_q(2, 1));
127 
128  if (tinterlace->mode == MODE_PAD) {
129  uint8_t black[4] = { 16, 128, 128, 16 };
130  int i, ret;
132  black[0] = black[3] = 0;
133  ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
134  outlink->w, outlink->h, outlink->format, 16);
135  if (ret < 0)
136  return ret;
137 
138  /* fill black picture with black */
139  for (i = 0; i < 4 && tinterlace->black_data[i]; i++) {
140  int h = i == 1 || i == 2 ? AV_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h) : outlink->h;
141  memset(tinterlace->black_data[i], black[i],
142  tinterlace->black_linesize[i] * h);
143  }
144  }
145  if ((tinterlace->flags & TINTERLACE_FLAG_VLPF)
146  && !(tinterlace->mode == MODE_INTERLEAVE_TOP
147  || tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) {
148  av_log(ctx, AV_LOG_WARNING, "low_pass_filter flag ignored with mode %d\n",
149  tinterlace->mode);
150  tinterlace->flags &= ~TINTERLACE_FLAG_VLPF;
151  }
152  tinterlace->preout_time_base = inlink->time_base;
153  if (tinterlace->mode == MODE_INTERLACEX2) {
154  tinterlace->preout_time_base.den *= 2;
155  outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1});
156  outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2});
157  } else if (tinterlace->mode == MODE_MERGEX2) {
158  outlink->frame_rate = inlink->frame_rate;
159  outlink->time_base = inlink->time_base;
160  } else if (tinterlace->mode != MODE_PAD) {
161  outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2});
162  outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1});
163  }
164 
165  for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){
166  if (!av_cmp_q(standard_tbs[i], outlink->time_base))
167  break;
168  }
169  if (i == FF_ARRAY_ELEMS(standard_tbs) ||
170  (tinterlace->flags & TINTERLACE_FLAG_EXACT_TB))
171  outlink->time_base = tinterlace->preout_time_base;
172 
173  if (tinterlace->flags & TINTERLACE_FLAG_VLPF) {
174  tinterlace->lowpass_line = lowpass_line_c;
175  if (ARCH_X86)
176  ff_tinterlace_init_x86(tinterlace);
177  }
178 
179  av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n",
180  tinterlace->mode, (tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "on" : "off",
181  inlink->h, outlink->h);
182 
183  return 0;
184 }
185 
186 #define FIELD_UPPER 0
187 #define FIELD_LOWER 1
188 #define FIELD_UPPER_AND_LOWER 2
189 
190 /**
191  * Copy picture field from src to dst.
192  *
193  * @param src_field copy from upper, lower field or both
194  * @param interleave leave a padding line between each copied line
195  * @param dst_field copy to upper or lower field,
196  * only meaningful when interleave is selected
197  * @param flags context flags
198  */
199 static inline
201  uint8_t *dst[4], int dst_linesize[4],
202  const uint8_t *src[4], int src_linesize[4],
203  enum AVPixelFormat format, int w, int src_h,
204  int src_field, int interleave, int dst_field,
205  int flags)
206 {
207  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
208  int hsub = desc->log2_chroma_w;
209  int plane, vsub = desc->log2_chroma_h;
210  int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
211  int h;
212 
213  for (plane = 0; plane < desc->nb_components; plane++) {
214  int lines = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(src_h, vsub) : src_h;
215  int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w;
216  uint8_t *dstp = dst[plane];
217  const uint8_t *srcp = src[plane];
218 
219  lines = (lines + (src_field == FIELD_UPPER)) / k;
220  if (src_field == FIELD_LOWER)
221  srcp += src_linesize[plane];
222  if (interleave && dst_field == FIELD_LOWER)
223  dstp += dst_linesize[plane];
224  if (flags & TINTERLACE_FLAG_VLPF) {
225  // Low-pass filtering is required when creating an interlaced destination from
226  // a progressive source which contains high-frequency vertical detail.
227  // Filtering will reduce interlace 'twitter' and Moire patterning.
228  int srcp_linesize = src_linesize[plane] * k;
229  int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
230  for (h = lines; h > 0; h--) {
231  const uint8_t *srcp_above = srcp - src_linesize[plane];
232  const uint8_t *srcp_below = srcp + src_linesize[plane];
233  if (h == lines) srcp_above = srcp; // there is no line above
234  if (h == 1) srcp_below = srcp; // there is no line below
235 
236  tinterlace->lowpass_line(dstp, cols, srcp, srcp_above, srcp_below);
237  dstp += dstp_linesize;
238  srcp += srcp_linesize;
239  }
240  } else {
241  av_image_copy_plane(dstp, dst_linesize[plane] * (interleave ? 2 : 1),
242  srcp, src_linesize[plane]*k, cols, lines);
243  }
244  }
245 }
246 
247 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
248 {
249  AVFilterContext *ctx = inlink->dst;
250  AVFilterLink *outlink = ctx->outputs[0];
251  TInterlaceContext *tinterlace = ctx->priv;
252  AVFrame *cur, *next, *out;
253  int field, tff, ret;
254 
255  av_frame_free(&tinterlace->cur);
256  tinterlace->cur = tinterlace->next;
257  tinterlace->next = picref;
258 
259  cur = tinterlace->cur;
260  next = tinterlace->next;
261  /* we need at least two frames */
262  if (!tinterlace->cur)
263  return 0;
264 
265  switch (tinterlace->mode) {
266  case MODE_MERGEX2: /* move the odd frame into the upper field of the new image, even into
267  * the lower field, generating a double-height video at same framerate */
268  case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
269  * the lower field, generating a double-height video at half framerate */
270  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
271  if (!out)
272  return AVERROR(ENOMEM);
273  av_frame_copy_props(out, cur);
274  out->height = outlink->h;
275  out->interlaced_frame = 1;
276  out->top_field_first = 1;
278 
279  /* write odd frame lines into the upper field of the new frame */
280  copy_picture_field(tinterlace, out->data, out->linesize,
281  (const uint8_t **)cur->data, cur->linesize,
282  inlink->format, inlink->w, inlink->h,
283  FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count & 1 ? FIELD_LOWER : FIELD_UPPER : FIELD_UPPER, tinterlace->flags);
284  /* write even frame lines into the lower field of the new frame */
285  copy_picture_field(tinterlace, out->data, out->linesize,
286  (const uint8_t **)next->data, next->linesize,
287  inlink->format, inlink->w, inlink->h,
288  FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count & 1 ? FIELD_UPPER : FIELD_LOWER : FIELD_LOWER, tinterlace->flags);
289  if (tinterlace->mode != MODE_MERGEX2)
290  av_frame_free(&tinterlace->next);
291  break;
292 
293  case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
294  case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
295  out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);
296  if (!out)
297  return AVERROR(ENOMEM);
298  av_frame_free(&tinterlace->next);
299  break;
300 
301  case MODE_PAD: /* expand each frame to double height, but pad alternate
302  * lines with black; framerate unchanged */
303  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
304  if (!out)
305  return AVERROR(ENOMEM);
306  av_frame_copy_props(out, cur);
307  out->height = outlink->h;
309 
310  field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
311  /* copy upper and lower fields */
312  copy_picture_field(tinterlace, out->data, out->linesize,
313  (const uint8_t **)cur->data, cur->linesize,
314  inlink->format, inlink->w, inlink->h,
315  FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags);
316  /* pad with black the other field */
317  copy_picture_field(tinterlace, out->data, out->linesize,
318  (const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
319  inlink->format, inlink->w, inlink->h,
320  FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags);
321  break;
322 
323  /* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
324  * halving the frame rate and preserving image height */
325  case MODE_INTERLEAVE_TOP: /* top field first */
326  case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
327  tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
328  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
329  if (!out)
330  return AVERROR(ENOMEM);
331  av_frame_copy_props(out, cur);
332  out->interlaced_frame = 1;
333  out->top_field_first = tff;
334 
335  /* copy upper/lower field from cur */
336  copy_picture_field(tinterlace, out->data, out->linesize,
337  (const uint8_t **)cur->data, cur->linesize,
338  inlink->format, inlink->w, inlink->h,
339  tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
340  tinterlace->flags);
341  /* copy lower/upper field from next */
342  copy_picture_field(tinterlace, out->data, out->linesize,
343  (const uint8_t **)next->data, next->linesize,
344  inlink->format, inlink->w, inlink->h,
345  tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
346  tinterlace->flags);
347  av_frame_free(&tinterlace->next);
348  break;
349  case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
350  /* output current frame first */
351  out = av_frame_clone(cur);
352  if (!out)
353  return AVERROR(ENOMEM);
354  out->interlaced_frame = 1;
355  if (cur->pts != AV_NOPTS_VALUE)
356  out->pts = cur->pts*2;
357 
358  out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
359  if ((ret = ff_filter_frame(outlink, out)) < 0)
360  return ret;
361 
362  /* output mix of current and next frame */
363  tff = next->top_field_first;
364  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
365  if (!out)
366  return AVERROR(ENOMEM);
367  av_frame_copy_props(out, next);
368  out->interlaced_frame = 1;
369  out->top_field_first = !tff;
370 
371  if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE)
372  out->pts = cur->pts + next->pts;
373  else
374  out->pts = AV_NOPTS_VALUE;
375  /* write current frame second field lines into the second field of the new frame */
376  copy_picture_field(tinterlace, out->data, out->linesize,
377  (const uint8_t **)cur->data, cur->linesize,
378  inlink->format, inlink->w, inlink->h,
379  tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
380  tinterlace->flags);
381  /* write next frame first field lines into the first field of the new frame */
382  copy_picture_field(tinterlace, out->data, out->linesize,
383  (const uint8_t **)next->data, next->linesize,
384  inlink->format, inlink->w, inlink->h,
385  tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
386  tinterlace->flags);
387  break;
388  default:
389  av_assert0(0);
390  }
391 
392  out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
393  ret = ff_filter_frame(outlink, out);
394  tinterlace->frame++;
395 
396  return ret;
397 }
398 
399 static const AVFilterPad tinterlace_inputs[] = {
400  {
401  .name = "default",
402  .type = AVMEDIA_TYPE_VIDEO,
403  .filter_frame = filter_frame,
404  },
405  { NULL }
406 };
407 
408 static const AVFilterPad tinterlace_outputs[] = {
409  {
410  .name = "default",
411  .type = AVMEDIA_TYPE_VIDEO,
412  .config_props = config_out_props,
413  },
414  { NULL }
415 };
416 
418  .name = "tinterlace",
419  .description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
420  .priv_size = sizeof(TInterlaceContext),
421  .uninit = uninit,
423  .inputs = tinterlace_inputs,
424  .outputs = tinterlace_outputs,
425  .priv_class = &tinterlace_class,
426 };
int plane
Definition: avisynth_c.h:291
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat full_scale_yuvj_pix_fmts[]
Definition: vf_tinterlace.c:64
static int query_formats(AVFilterContext *ctx)
Definition: vf_tinterlace.c:74
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2193
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
#define OFFSET(x)
Definition: vf_tinterlace.c:35
AVOption.
Definition: opt.h:245
AVFormatContext * ctx
Definition: movenc-test.c:48
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
Main libavfilter public API header.
AVFrame * next
Definition: tinterlace.h:53
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:191
#define FIELD_LOWER
int mode
TInterlaceMode, interlace mode selected.
Definition: tinterlace.h:47
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:66
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
static AVRational av_make_q(int num, int den)
Create a rational.
Definition: rational.h:53
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:49
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:61
BYTE int const BYTE * srcp
Definition: avisynth_c.h:676
const char * name
Pad name.
Definition: internal.h:59
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:313
#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:1180
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:102
uint8_t
#define av_cold
Definition: attributes.h:82
static const AVOption tinterlace_options[]
Definition: vf_tinterlace.c:40
temporal field interlace filter, ported from MPlayer/libmpcodecs
mode
Definition: f_perms.c:27
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:264
int frame
number of the output frame
Definition: tinterlace.h:50
static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, const uint8_t *srcp_above, const uint8_t *srcp_below)
Definition: vf_tinterlace.c:91
int black_linesize[4]
Definition: tinterlace.h:55
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:314
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:53
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 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:187
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:51
BYTE * dstp
Definition: avisynth_c.h:676
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void * priv
private data for use by the filter
Definition: avfilter.h:320
#define FLAGS
Definition: vf_tinterlace.c:36
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().
AVFILTER_DEFINE_CLASS(tinterlace)
#define TINTERLACE_FLAG_EXACT_TB
Definition: vf_tinterlace.c:38
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)
#define width
static const AVFilterPad tinterlace_outputs[]
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
#define src
Definition: vp9dsp.c:530
static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
static const AVRational standard_tbs[]
Definition: vf_tinterlace.c:68
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:468
#define FF_ARRAY_ELEMS(a)
FILE * out
Definition: movenc-test.c:54
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:188
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
static const char * format
Definition: movenc-test.c:47
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:259
uint8_t * black_data[4]
buffer used to fill padded lines
Definition: tinterlace.h:54
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
Filter definition.
Definition: avfilter.h:142
rational number numerator/denominator
Definition: rational.h:43
const char * name
Filter name.
Definition: avfilter.h:146
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:317
static void interleave(short *output, short **input, int channels, int samples)
Definition: resample.c:161
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
AVFrame * cur
Definition: tinterlace.h:52
static const AVFilterPad tinterlace_inputs[]
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
static int config_out_props(AVFilterLink *outlink)
void(* lowpass_line)(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, const uint8_t *srcp_above, const uint8_t *srcp_below)
Definition: tinterlace.h:56
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
int den
denominator
Definition: rational.h:45
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:319
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:305
int height
Definition: frame.h:232
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:100
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:287
internal API functions
#define FIELD_UPPER_AND_LOWER
AVRational preout_time_base
Definition: tinterlace.h:48
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:574
#define TINTERLACE_FLAG_VLPF
Definition: vf_tinterlace.c:37
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58