FFmpeg
vf_scale.c
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1 /*
2  * Copyright (c) 2007 Bobby Bingham
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 /**
22  * @file
23  * scale video filter
24  */
25 
26 #include <float.h>
27 #include <stdio.h>
28 #include <string.h>
29 
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.h"
33 #include "framesync.h"
34 #include "libavutil/pixfmt.h"
35 #include "scale_eval.h"
36 #include "video.h"
37 #include "libavutil/eval.h"
38 #include "libavutil/imgutils_internal.h"
39 #include "libavutil/internal.h"
40 #include "libavutil/mem.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/parseutils.h"
43 #include "libavutil/pixdesc.h"
44 #include "libswscale/swscale.h"
45 
46 static const char *const var_names[] = {
47  "in_w", "iw",
48  "in_h", "ih",
49  "out_w", "ow",
50  "out_h", "oh",
51  "a",
52  "sar",
53  "dar",
54  "hsub",
55  "vsub",
56  "ohsub",
57  "ovsub",
58  "n",
59  "t",
60 #if FF_API_FRAME_PKT
61  "pos",
62 #endif
63  "ref_w", "rw",
64  "ref_h", "rh",
65  "ref_a",
66  "ref_sar",
67  "ref_dar", "rdar",
68  "ref_hsub",
69  "ref_vsub",
70  "ref_n",
71  "ref_t",
72  "ref_pos",
73  /* Legacy variables for scale2ref */
74  "main_w",
75  "main_h",
76  "main_a",
77  "main_sar",
78  "main_dar", "mdar",
79  "main_hsub",
80  "main_vsub",
81  "main_n",
82  "main_t",
83  "main_pos",
84  NULL
85 };
86 
87 enum var_name {
88  VAR_IN_W, VAR_IW,
89  VAR_IN_H, VAR_IH,
90  VAR_OUT_W, VAR_OW,
91  VAR_OUT_H, VAR_OH,
92  VAR_A,
93  VAR_SAR,
94  VAR_DAR,
95  VAR_HSUB,
96  VAR_VSUB,
97  VAR_OHSUB,
98  VAR_OVSUB,
99  VAR_N,
100  VAR_T,
101 #if FF_API_FRAME_PKT
102  VAR_POS,
103 #endif
104  VAR_REF_W, VAR_RW,
105  VAR_REF_H, VAR_RH,
106  VAR_REF_A,
107  VAR_REF_SAR,
108  VAR_REF_DAR, VAR_RDAR,
109  VAR_REF_HSUB,
110  VAR_REF_VSUB,
111  VAR_REF_N,
112  VAR_REF_T,
113  VAR_REF_POS,
114  VAR_S2R_MAIN_W,
115  VAR_S2R_MAIN_H,
116  VAR_S2R_MAIN_A,
117  VAR_S2R_MAIN_SAR,
118  VAR_S2R_MAIN_DAR, VAR_S2R_MDAR,
119  VAR_S2R_MAIN_HSUB,
120  VAR_S2R_MAIN_VSUB,
121  VAR_S2R_MAIN_N,
122  VAR_S2R_MAIN_T,
123  VAR_S2R_MAIN_POS,
124  VARS_NB
125 };
126 
127 enum EvalMode {
128  EVAL_MODE_INIT,
129  EVAL_MODE_FRAME,
130  EVAL_MODE_NB
131 };
132 
133 typedef struct ScaleContext {
134  const AVClass *class;
135  SwsContext *sws;
136  FFFrameSync fs;
137 
138  /**
139  * New dimensions. Special values are:
140  * 0 = original width/height
141  * -1 = keep original aspect
142  * -N = try to keep aspect but make sure it is divisible by N
143  */
144  int w, h;
145  char *size_str;
146  double param[2]; // sws params
147 
148  int hsub, vsub; ///< chroma subsampling
149  int slice_y; ///< top of current output slice
150  int interlaced;
151  int uses_ref;
152 
153  char *w_expr; ///< width expression string
154  char *h_expr; ///< height expression string
155  AVExpr *w_pexpr;
156  AVExpr *h_pexpr;
157  double var_values[VARS_NB];
158 
159  char *flags_str;
160 
161  int in_color_matrix;
162  int out_color_matrix;
163  int in_primaries;
164  int out_primaries;
165  int in_transfer;
166  int out_transfer;
167  int in_range;
168  int out_range;
169 
170  int in_chroma_loc;
171  int out_chroma_loc;
172  int out_h_chr_pos;
173  int out_v_chr_pos;
174  int in_h_chr_pos;
175  int in_v_chr_pos;
176 
177  int force_original_aspect_ratio;
178  int force_divisible_by;
179 
180  int eval_mode; ///< expression evaluation mode
181 
182 } ScaleContext;
183 
184 const FFFilter ff_vf_scale2ref;
185 #define IS_SCALE2REF(ctx) ((ctx)->filter == &ff_vf_scale2ref.p)
186 
187 static int config_props(AVFilterLink *outlink);
188 
189 static int check_exprs(AVFilterContext *ctx)
190 {
191  ScaleContext *scale = ctx->priv;
192  unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
193 
194  if (!scale->w_pexpr && !scale->h_pexpr)
195  return AVERROR(EINVAL);
196 
197  if (scale->w_pexpr)
198  av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
199  if (scale->h_pexpr)
200  av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
201 
202  if (vars_w[VAR_OUT_W] || vars_w[VAR_OW]) {
203  av_log(ctx, AV_LOG_ERROR, "Width expression cannot be self-referencing: '%s'.\n", scale->w_expr);
204  return AVERROR(EINVAL);
205  }
206 
207  if (vars_h[VAR_OUT_H] || vars_h[VAR_OH]) {
208  av_log(ctx, AV_LOG_ERROR, "Height expression cannot be self-referencing: '%s'.\n", scale->h_expr);
209  return AVERROR(EINVAL);
210  }
211 
212  if ((vars_w[VAR_OUT_H] || vars_w[VAR_OH]) &&
213  (vars_h[VAR_OUT_W] || vars_h[VAR_OW])) {
214  av_log(ctx, AV_LOG_WARNING, "Circular references detected for width '%s' and height '%s' - possibly invalid.\n", scale->w_expr, scale->h_expr);
215  }
216 
217  if (vars_w[VAR_REF_W] || vars_h[VAR_REF_W] ||
218  vars_w[VAR_RW] || vars_h[VAR_RW] ||
219  vars_w[VAR_REF_H] || vars_h[VAR_REF_H] ||
220  vars_w[VAR_RH] || vars_h[VAR_RH] ||
221  vars_w[VAR_REF_A] || vars_h[VAR_REF_A] ||
222  vars_w[VAR_REF_SAR] || vars_h[VAR_REF_SAR] ||
223  vars_w[VAR_REF_DAR] || vars_h[VAR_REF_DAR] ||
224  vars_w[VAR_RDAR] || vars_h[VAR_RDAR] ||
225  vars_w[VAR_REF_HSUB] || vars_h[VAR_REF_HSUB] ||
226  vars_w[VAR_REF_VSUB] || vars_h[VAR_REF_VSUB] ||
227  vars_w[VAR_REF_N] || vars_h[VAR_REF_N] ||
228  vars_w[VAR_REF_T] || vars_h[VAR_REF_T] ||
229  vars_w[VAR_REF_POS] || vars_h[VAR_REF_POS]) {
230  scale->uses_ref = 1;
231  }
232 
233  if (!IS_SCALE2REF(ctx) &&
234  (vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
235  vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
236  vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
237  vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
238  vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
239  vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] ||
240  vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] ||
241  vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
242  vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
243  vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
244  vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
245  av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n");
246  return AVERROR(EINVAL);
247  }
248 
249  if (!IS_SCALE2REF(ctx) &&
250  (vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
251  vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
252  vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
253  vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
254  vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
255  vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] ||
256  vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] ||
257  vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
258  vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
259  vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
260  vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
261  av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n");
262  return AVERROR(EINVAL);
263  }
264 
265  if (scale->eval_mode == EVAL_MODE_INIT &&
266  (vars_w[VAR_N] || vars_h[VAR_N] ||
267  vars_w[VAR_T] || vars_h[VAR_T] ||
268 #if FF_API_FRAME_PKT
269  vars_w[VAR_POS] || vars_h[VAR_POS] ||
270 #endif
271  vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
272  vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
273  vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
274  av_log(ctx, AV_LOG_ERROR, "Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode.\n");
275  return AVERROR(EINVAL);
276  }
277 
278  return 0;
279 }
280 
281 static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
282 {
283  ScaleContext *scale = ctx->priv;
284  int ret, is_inited = 0;
285  char *old_str_expr = NULL;
286  AVExpr *old_pexpr = NULL;
287 
288  if (str_expr) {
289  old_str_expr = av_strdup(str_expr);
290  if (!old_str_expr)
291  return AVERROR(ENOMEM);
292  av_opt_set(scale, var, args, 0);
293  }
294 
295  if (*pexpr_ptr) {
296  old_pexpr = *pexpr_ptr;
297  *pexpr_ptr = NULL;
298  is_inited = 1;
299  }
300 
301  ret = av_expr_parse(pexpr_ptr, args, var_names,
302  NULL, NULL, NULL, NULL, 0, ctx);
303  if (ret < 0) {
304  av_log(ctx, AV_LOG_ERROR, "Cannot parse expression for %s: '%s'\n", var, args);
305  goto revert;
306  }
307 
308  ret = check_exprs(ctx);
309  if (ret < 0)
310  goto revert;
311 
312  if (is_inited && (ret = config_props(ctx->outputs[0])) < 0)
313  goto revert;
314 
315  av_expr_free(old_pexpr);
316  old_pexpr = NULL;
317  av_freep(&old_str_expr);
318 
319  return 0;
320 
321 revert:
322  av_expr_free(*pexpr_ptr);
323  *pexpr_ptr = NULL;
324  if (old_str_expr) {
325  av_opt_set(scale, var, old_str_expr, 0);
326  av_free(old_str_expr);
327  }
328  if (old_pexpr)
329  *pexpr_ptr = old_pexpr;
330 
331  return ret;
332 }
333 
334 static av_cold int preinit(AVFilterContext *ctx)
335 {
336  ScaleContext *scale = ctx->priv;
337 
338  scale->sws = sws_alloc_context();
339  if (!scale->sws)
340  return AVERROR(ENOMEM);
341 
342  // set threads=0, so we can later check whether the user modified it
343  scale->sws->threads = 0;
344 
345  ff_framesync_preinit(&scale->fs);
346 
347  return 0;
348 }
349 
350 static int do_scale(FFFrameSync *fs);
351 
352 static av_cold int init(AVFilterContext *ctx)
353 {
354  ScaleContext *scale = ctx->priv;
355  int ret;
356 
357  if (IS_SCALE2REF(ctx))
358  av_log(ctx, AV_LOG_WARNING, "scale2ref is deprecated, use scale=rw:rh instead\n");
359 
360  if (scale->size_str && (scale->w_expr || scale->h_expr)) {
361  av_log(ctx, AV_LOG_ERROR,
362  "Size and width/height expressions cannot be set at the same time.\n");
363  return AVERROR(EINVAL);
364  }
365 
366  if (scale->w_expr && !scale->h_expr)
367  FFSWAP(char *, scale->w_expr, scale->size_str);
368 
369  if (scale->size_str) {
370  char buf[32];
371  if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
372  av_log(ctx, AV_LOG_ERROR,
373  "Invalid size '%s'\n", scale->size_str);
374  return ret;
375  }
376  snprintf(buf, sizeof(buf)-1, "%d", scale->w);
377  av_opt_set(scale, "w", buf, 0);
378  snprintf(buf, sizeof(buf)-1, "%d", scale->h);
379  av_opt_set(scale, "h", buf, 0);
380  }
381  if (!scale->w_expr)
382  av_opt_set(scale, "w", "iw", 0);
383  if (!scale->h_expr)
384  av_opt_set(scale, "h", "ih", 0);
385 
386  ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
387  if (ret < 0)
388  return ret;
389 
390  ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
391  if (ret < 0)
392  return ret;
393 
394  if (scale->in_primaries != -1 && !sws_test_primaries(scale->in_primaries, 0)) {
395  av_log(ctx, AV_LOG_ERROR, "Unsupported input primaries '%s'\n",
396  av_color_primaries_name(scale->in_primaries));
397  return AVERROR(EINVAL);
398  }
399 
400  if (scale->out_primaries != -1 && !sws_test_primaries(scale->out_primaries, 1)) {
401  av_log(ctx, AV_LOG_ERROR, "Unsupported output primaries '%s'\n",
402  av_color_primaries_name(scale->out_primaries));
403  return AVERROR(EINVAL);
404  }
405 
406  if (scale->in_transfer != -1 && !sws_test_transfer(scale->in_transfer, 0)) {
407  av_log(ctx, AV_LOG_ERROR, "Unsupported input transfer '%s'\n",
408  av_color_transfer_name(scale->in_transfer));
409  return AVERROR(EINVAL);
410  }
411 
412  if (scale->out_transfer != -1 && !sws_test_transfer(scale->out_transfer, 1)) {
413  av_log(ctx, AV_LOG_ERROR, "Unsupported output transfer '%s'\n",
414  av_color_transfer_name(scale->out_transfer));
415  return AVERROR(EINVAL);
416  }
417 
418  if (scale->in_color_matrix != -1 && !sws_test_colorspace(scale->in_color_matrix, 0)) {
419  av_log(ctx, AV_LOG_ERROR, "Unsupported input color matrix '%s'\n",
420  av_color_space_name(scale->in_color_matrix));
421  return AVERROR(EINVAL);
422  }
423 
424  if (scale->out_color_matrix != -1 && !sws_test_colorspace(scale->out_color_matrix, 1)) {
425  av_log(ctx, AV_LOG_ERROR, "Unsupported output color matrix '%s'\n",
426  av_color_space_name(scale->out_color_matrix));
427  return AVERROR(EINVAL);
428  }
429 
430  av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
431  scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
432 
433  if (scale->flags_str && *scale->flags_str) {
434  ret = av_opt_set(scale->sws, "sws_flags", scale->flags_str, 0);
435  if (ret < 0)
436  return ret;
437  }
438 
439  for (int i = 0; i < FF_ARRAY_ELEMS(scale->param); i++)
440  if (scale->param[i] != DBL_MAX)
441  scale->sws->scaler_params[i] = scale->param[i];
442 
443  scale->sws->src_h_chr_pos = scale->in_h_chr_pos;
444  scale->sws->src_v_chr_pos = scale->in_v_chr_pos;
445  scale->sws->dst_h_chr_pos = scale->out_h_chr_pos;
446  scale->sws->dst_v_chr_pos = scale->out_v_chr_pos;
447 
448  // use generic thread-count if the user did not set it explicitly
449  if (!scale->sws->threads)
450  scale->sws->threads = ff_filter_get_nb_threads(ctx);
451 
452  if (!IS_SCALE2REF(ctx) && scale->uses_ref) {
453  AVFilterPad pad = {
454  .name = "ref",
455  .type = AVMEDIA_TYPE_VIDEO,
456  };
457  ret = ff_append_inpad(ctx, &pad);
458  if (ret < 0)
459  return ret;
460  }
461 
462  return 0;
463 }
464 
465 static av_cold void uninit(AVFilterContext *ctx)
466 {
467  ScaleContext *scale = ctx->priv;
468  av_expr_free(scale->w_pexpr);
469  av_expr_free(scale->h_pexpr);
470  scale->w_pexpr = scale->h_pexpr = NULL;
471  ff_framesync_uninit(&scale->fs);
472  sws_free_context(&scale->sws);
473 }
474 
475 static int query_formats(const AVFilterContext *ctx,
476  AVFilterFormatsConfig **cfg_in,
477  AVFilterFormatsConfig **cfg_out)
478 {
479  const ScaleContext *scale = ctx->priv;
480  AVFilterFormats *formats;
481  const AVPixFmtDescriptor *desc;
482  enum AVPixelFormat pix_fmt;
483  int ret;
484 
485  desc = NULL;
486  formats = NULL;
487  while ((desc = av_pix_fmt_desc_next(desc))) {
488  pix_fmt = av_pix_fmt_desc_get_id(desc);
489  if (sws_test_format(pix_fmt, 0)) {
490  if ((ret = ff_add_format(&formats, pix_fmt)) < 0)
491  return ret;
492  }
493  }
494  if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
495  return ret;
496 
497  desc = NULL;
498  formats = NULL;
499  while ((desc = av_pix_fmt_desc_next(desc))) {
500  pix_fmt = av_pix_fmt_desc_get_id(desc);
501  if (sws_test_format(pix_fmt, 1) || pix_fmt == AV_PIX_FMT_PAL8) {
502  if ((ret = ff_add_format(&formats, pix_fmt)) < 0)
503  return ret;
504  }
505  }
506  if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
507  return ret;
508 
509  /* accept all supported inputs, even if user overrides their properties */
510  formats = ff_all_color_spaces();
511  for (int i = 0; i < formats->nb_formats; i++) {
512  if (!sws_test_colorspace(formats->formats[i], 0)) {
513  for (int j = i--; j + 1 < formats->nb_formats; j++)
514  formats->formats[j] = formats->formats[j + 1];
515  formats->nb_formats--;
516  }
517  }
518  if ((ret = ff_formats_ref(formats, &cfg_in[0]->color_spaces)) < 0)
519  return ret;
520 
521  if ((ret = ff_formats_ref(ff_all_color_ranges(),
522  &cfg_in[0]->color_ranges)) < 0)
523  return ret;
524 
525  /* propagate output properties if overridden */
526  if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED) {
527  formats = ff_make_formats_list_singleton(scale->out_color_matrix);
528  } else {
529  formats = ff_all_color_spaces();
530  for (int i = 0; i < formats->nb_formats; i++) {
531  if (!sws_test_colorspace(formats->formats[i], 1)) {
532  for (int j = i--; j + 1 < formats->nb_formats; j++)
533  formats->formats[j] = formats->formats[j + 1];
534  formats->nb_formats--;
535  }
536  }
537  }
538  if ((ret = ff_formats_ref(formats, &cfg_out[0]->color_spaces)) < 0)
539  return ret;
540 
541  formats = scale->out_range != AVCOL_RANGE_UNSPECIFIED
542  ? ff_make_formats_list_singleton(scale->out_range)
543  : ff_all_color_ranges();
544  if ((ret = ff_formats_ref(formats, &cfg_out[0]->color_ranges)) < 0)
545  return ret;
546 
547  return 0;
548 }
549 
550 static int scale_eval_dimensions(AVFilterContext *ctx)
551 {
552  ScaleContext *scale = ctx->priv;
553  const char scale2ref = IS_SCALE2REF(ctx);
554  const AVFilterLink *inlink = scale2ref ? ctx->inputs[1] : ctx->inputs[0];
555  const AVFilterLink *outlink = ctx->outputs[0];
556  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
557  const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
558  char *expr;
559  int eval_w, eval_h;
560  int ret;
561  double res;
562  const AVPixFmtDescriptor *main_desc;
563  const AVFilterLink *main_link;
564 
565  if (scale2ref) {
566  main_link = ctx->inputs[0];
567  main_desc = av_pix_fmt_desc_get(main_link->format);
568  }
569 
570  scale->var_values[VAR_IN_W] = scale->var_values[VAR_IW] = inlink->w;
571  scale->var_values[VAR_IN_H] = scale->var_values[VAR_IH] = inlink->h;
572  scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = NAN;
573  scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = NAN;
574  scale->var_values[VAR_A] = (double) inlink->w / inlink->h;
575  scale->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
576  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
577  scale->var_values[VAR_DAR] = scale->var_values[VAR_A] * scale->var_values[VAR_SAR];
578  scale->var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
579  scale->var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
580  scale->var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
581  scale->var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
582 
583  if (scale2ref) {
584  scale->var_values[VAR_S2R_MAIN_W] = main_link->w;
585  scale->var_values[VAR_S2R_MAIN_H] = main_link->h;
586  scale->var_values[VAR_S2R_MAIN_A] = (double) main_link->w / main_link->h;
587  scale->var_values[VAR_S2R_MAIN_SAR] = main_link->sample_aspect_ratio.num ?
588  (double) main_link->sample_aspect_ratio.num / main_link->sample_aspect_ratio.den : 1;
589  scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] =
590  scale->var_values[VAR_S2R_MAIN_A] * scale->var_values[VAR_S2R_MAIN_SAR];
591  scale->var_values[VAR_S2R_MAIN_HSUB] = 1 << main_desc->log2_chroma_w;
592  scale->var_values[VAR_S2R_MAIN_VSUB] = 1 << main_desc->log2_chroma_h;
593  }
594 
595  if (scale->uses_ref) {
596  const AVFilterLink *reflink = ctx->inputs[1];
597  const AVPixFmtDescriptor *ref_desc = av_pix_fmt_desc_get(reflink->format);
598  scale->var_values[VAR_REF_W] = scale->var_values[VAR_RW] = reflink->w;
599  scale->var_values[VAR_REF_H] = scale->var_values[VAR_RH] = reflink->h;
600  scale->var_values[VAR_REF_A] = (double) reflink->w / reflink->h;
601  scale->var_values[VAR_REF_SAR] = reflink->sample_aspect_ratio.num ?
602  (double) reflink->sample_aspect_ratio.num / reflink->sample_aspect_ratio.den : 1;
603  scale->var_values[VAR_REF_DAR] = scale->var_values[VAR_RDAR] =
604  scale->var_values[VAR_REF_A] * scale->var_values[VAR_REF_SAR];
605  scale->var_values[VAR_REF_HSUB] = 1 << ref_desc->log2_chroma_w;
606  scale->var_values[VAR_REF_VSUB] = 1 << ref_desc->log2_chroma_h;
607  }
608 
609  res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
610  eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
611 
612  res = av_expr_eval(scale->h_pexpr, scale->var_values, NULL);
613  if (isnan(res)) {
614  expr = scale->h_expr;
615  ret = AVERROR(EINVAL);
616  goto fail;
617  }
618  eval_h = scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = (int) res == 0 ? inlink->h : (int) res;
619 
620  res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
621  if (isnan(res)) {
622  expr = scale->w_expr;
623  ret = AVERROR(EINVAL);
624  goto fail;
625  }
626  eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
627 
628  scale->w = eval_w;
629  scale->h = eval_h;
630 
631  return 0;
632 
633 fail:
634  av_log(ctx, AV_LOG_ERROR,
635  "Error when evaluating the expression '%s'.\n", expr);
636  return ret;
637 }
638 
639 static int config_props(AVFilterLink *outlink)
640 {
641  AVFilterContext *ctx = outlink->src;
642  AVFilterLink *inlink0 = outlink->src->inputs[0];
643  AVFilterLink *inlink = IS_SCALE2REF(ctx) ?
644  outlink->src->inputs[1] :
645  outlink->src->inputs[0];
646  ScaleContext *scale = ctx->priv;
647  uint8_t *flags_val = NULL;
648  int ret;
649 
650  if ((ret = scale_eval_dimensions(ctx)) < 0)
651  goto fail;
652 
653  outlink->w = scale->w;
654  outlink->h = scale->h;
655 
656  ret = ff_scale_adjust_dimensions(inlink, &outlink->w, &outlink->h,
657  scale->force_original_aspect_ratio,
658  scale->force_divisible_by);
659 
660  if (ret < 0)
661  goto fail;
662 
663  if (outlink->w > INT_MAX ||
664  outlink->h > INT_MAX ||
665  (outlink->h * inlink->w) > INT_MAX ||
666  (outlink->w * inlink->h) > INT_MAX)
667  av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
668 
669  /* TODO: make algorithm configurable */
670 
671  if (inlink0->sample_aspect_ratio.num){
672  outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
673  } else
674  outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
675 
676  av_opt_get(scale->sws, "sws_flags", 0, &flags_val);
677  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s csp:%s range:%s sar:%d/%d -> w:%d h:%d fmt:%s csp:%s range:%s sar:%d/%d flags:%s\n",
678  inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
679  av_color_space_name(inlink->colorspace), av_color_range_name(inlink->color_range),
680  inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
681  outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
682  av_color_space_name(outlink->colorspace), av_color_range_name(outlink->color_range),
683  outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
684  flags_val);
685  av_freep(&flags_val);
686 
687  if (!IS_SCALE2REF(ctx)) {
688  ff_framesync_uninit(&scale->fs);
689  ret = ff_framesync_init(&scale->fs, ctx, ctx->nb_inputs);
690  if (ret < 0)
691  return ret;
692  scale->fs.on_event = do_scale;
693  scale->fs.in[0].time_base = ctx->inputs[0]->time_base;
694  scale->fs.in[0].sync = 1;
695  scale->fs.in[0].before = EXT_STOP;
696  scale->fs.in[0].after = EXT_STOP;
697  if (scale->uses_ref) {
698  av_assert0(ctx->nb_inputs == 2);
699  scale->fs.in[1].time_base = ctx->inputs[1]->time_base;
700  scale->fs.in[1].sync = 0;
701  scale->fs.in[1].before = EXT_NULL;
702  scale->fs.in[1].after = EXT_INFINITY;
703  }
704 
705  ret = ff_framesync_configure(&scale->fs);
706  if (ret < 0)
707  return ret;
708  }
709 
710  return 0;
711 
712 fail:
713  return ret;
714 }
715 
716 static int config_props_ref(AVFilterLink *outlink)
717 {
718  AVFilterLink *inlink = outlink->src->inputs[1];
719  FilterLink *il = ff_filter_link(inlink);
720  FilterLink *ol = ff_filter_link(outlink);
721 
722  outlink->w = inlink->w;
723  outlink->h = inlink->h;
724  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
725  outlink->time_base = inlink->time_base;
726  ol->frame_rate = il->frame_rate;
727  outlink->colorspace = inlink->colorspace;
728  outlink->color_range = inlink->color_range;
729 
730  return 0;
731 }
732 
733 static int request_frame(AVFilterLink *outlink)
734 {
735  return ff_request_frame(outlink->src->inputs[0]);
736 }
737 
738 static int request_frame_ref(AVFilterLink *outlink)
739 {
740  return ff_request_frame(outlink->src->inputs[1]);
741 }
742 
743 /* Takes over ownership of *frame_in, passes ownership of *frame_out to caller */
744 static int scale_frame(AVFilterLink *link, AVFrame **frame_in,
745  AVFrame **frame_out)
746 {
747  FilterLink *inl = ff_filter_link(link);
748  AVFilterContext *ctx = link->dst;
749  ScaleContext *scale = ctx->priv;
750  AVFilterLink *outlink = ctx->outputs[0];
751  AVFrame *out, *in = *frame_in;
752  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
753  char buf[32];
754  int ret, flags_orig, frame_changed;
755 
756  *frame_in = NULL;
757 
758  frame_changed = in->width != link->w ||
759  in->height != link->h ||
760  in->format != link->format ||
761  in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
762  in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
763  in->colorspace != link->colorspace ||
764  in->color_range != link->color_range;
765 
766  if (scale->eval_mode == EVAL_MODE_FRAME || frame_changed) {
767  unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
768 
769  av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
770  av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
771 
772  if (scale->eval_mode == EVAL_MODE_FRAME &&
773  !frame_changed &&
774  !IS_SCALE2REF(ctx) &&
775  !(vars_w[VAR_N] || vars_w[VAR_T]
776 #if FF_API_FRAME_PKT
777  || vars_w[VAR_POS]
778 #endif
779  ) &&
780  !(vars_h[VAR_N] || vars_h[VAR_T]
781 #if FF_API_FRAME_PKT
782  || vars_h[VAR_POS]
783 #endif
784  ) &&
785  scale->w && scale->h)
786  goto scale;
787 
788  if (scale->eval_mode == EVAL_MODE_INIT) {
789  snprintf(buf, sizeof(buf) - 1, "%d", scale->w);
790  av_opt_set(scale, "w", buf, 0);
791  snprintf(buf, sizeof(buf) - 1, "%d", scale->h);
792  av_opt_set(scale, "h", buf, 0);
793 
794  ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
795  if (ret < 0)
796  goto err;
797 
798  ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
799  if (ret < 0)
800  goto err;
801  }
802 
803  if (IS_SCALE2REF(ctx)) {
804  scale->var_values[VAR_S2R_MAIN_N] = inl->frame_count_out;
805  scale->var_values[VAR_S2R_MAIN_T] = TS2T(in->pts, link->time_base);
806 #if FF_API_FRAME_PKT
807 FF_DISABLE_DEPRECATION_WARNINGS
808  scale->var_values[VAR_S2R_MAIN_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
809 FF_ENABLE_DEPRECATION_WARNINGS
810 #endif
811  } else {
812  scale->var_values[VAR_N] = inl->frame_count_out;
813  scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
814 #if FF_API_FRAME_PKT
815 FF_DISABLE_DEPRECATION_WARNINGS
816  scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
817 FF_ENABLE_DEPRECATION_WARNINGS
818 #endif
819  }
820 
821  link->dst->inputs[0]->format = in->format;
822  link->dst->inputs[0]->w = in->width;
823  link->dst->inputs[0]->h = in->height;
824  link->dst->inputs[0]->colorspace = in->colorspace;
825  link->dst->inputs[0]->color_range = in->color_range;
826 
827  link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
828  link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
829 
830  if ((ret = config_props(outlink)) < 0)
831  goto err;
832  }
833 
834 scale:
835  scale->hsub = desc->log2_chroma_w;
836  scale->vsub = desc->log2_chroma_h;
837 
838  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
839  if (!out) {
840  ret = AVERROR(ENOMEM);
841  goto err;
842  }
843 
844  if (scale->in_color_matrix != -1)
845  in->colorspace = scale->in_color_matrix;
846  if (scale->in_primaries != -1)
847  in->color_primaries = scale->in_primaries;
848  if (scale->in_transfer != -1)
849  in->color_trc = scale->in_transfer;
850  if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
851  in->color_range = scale->in_range;
852  in->chroma_location = scale->in_chroma_loc;
853 
854  flags_orig = in->flags;
855  if (scale->interlaced > 0)
856  in->flags |= AV_FRAME_FLAG_INTERLACED;
857  else if (!scale->interlaced)
858  in->flags &= ~AV_FRAME_FLAG_INTERLACED;
859 
860  av_frame_copy_props(out, in);
861  out->width = outlink->w;
862  out->height = outlink->h;
863  out->color_range = outlink->color_range;
864  out->colorspace = outlink->colorspace;
865  if (scale->out_chroma_loc != AVCHROMA_LOC_UNSPECIFIED)
866  out->chroma_location = scale->out_chroma_loc;
867  if (scale->out_primaries != -1)
868  out->color_primaries = scale->out_primaries;
869  if (scale->out_transfer != -1)
870  out->color_trc = scale->out_transfer;
871 
872  if (out->width != in->width || out->height != in->height) {
873  av_frame_side_data_remove_by_props(&out->side_data, &out->nb_side_data,
874  AV_SIDE_DATA_PROP_SIZE_DEPENDENT);
875  }
876 
877  if (in->color_primaries != out->color_primaries || in->color_trc != out->color_trc) {
878  av_frame_side_data_remove_by_props(&out->side_data, &out->nb_side_data,
879  AV_SIDE_DATA_PROP_COLOR_DEPENDENT);
880  }
881 
882  av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
883  (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
884  (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
885  INT_MAX);
886 
887  if (sws_is_noop(out, in)) {
888  av_frame_free(&out);
889  in->flags = flags_orig;
890  *frame_out = in;
891  return 0;
892  }
893 
894  if (out->format == AV_PIX_FMT_PAL8) {
895  out->format = AV_PIX_FMT_BGR8;
896  avpriv_set_systematic_pal2((uint32_t*) out->data[1], out->format);
897  }
898 
899  ret = sws_scale_frame(scale->sws, out, in);
900  av_frame_free(&in);
901  out->flags = flags_orig;
902  out->format = outlink->format; /* undo PAL8 handling */
903  if (ret < 0)
904  av_frame_free(&out);
905  *frame_out = out;
906  return ret;
907 
908 err:
909  av_frame_free(&in);
910  return ret;
911 }
912 
913 static int do_scale(FFFrameSync *fs)
914 {
915  AVFilterContext *ctx = fs->parent;
916  ScaleContext *scale = ctx->priv;
917  AVFilterLink *outlink = ctx->outputs[0];
918  AVFrame *out, *in = NULL, *ref = NULL;
919  int ret = 0, frame_changed;
920 
921  ret = ff_framesync_get_frame(fs, 0, &in, 1);
922  if (ret < 0)
923  goto err;
924 
925  if (scale->uses_ref) {
926  ret = ff_framesync_get_frame(fs, 1, &ref, 0);
927  if (ret < 0)
928  goto err;
929  }
930 
931  if (ref) {
932  AVFilterLink *reflink = ctx->inputs[1];
933  FilterLink *rl = ff_filter_link(reflink);
934 
935  frame_changed = ref->width != reflink->w ||
936  ref->height != reflink->h ||
937  ref->format != reflink->format ||
938  ref->sample_aspect_ratio.den != reflink->sample_aspect_ratio.den ||
939  ref->sample_aspect_ratio.num != reflink->sample_aspect_ratio.num ||
940  ref->colorspace != reflink->colorspace ||
941  ref->color_range != reflink->color_range;
942 
943  if (frame_changed) {
944  reflink->format = ref->format;
945  reflink->w = ref->width;
946  reflink->h = ref->height;
947  reflink->sample_aspect_ratio.num = ref->sample_aspect_ratio.num;
948  reflink->sample_aspect_ratio.den = ref->sample_aspect_ratio.den;
949  reflink->colorspace = ref->colorspace;
950  reflink->color_range = ref->color_range;
951 
952  ret = config_props(outlink);
953  if (ret < 0)
954  goto err;
955  }
956 
957  if (scale->eval_mode == EVAL_MODE_FRAME) {
958  scale->var_values[VAR_REF_N] = rl->frame_count_out;
959  scale->var_values[VAR_REF_T] = TS2T(ref->pts, reflink->time_base);
960 #if FF_API_FRAME_PKT
961 FF_DISABLE_DEPRECATION_WARNINGS
962  scale->var_values[VAR_REF_POS] = ref->pkt_pos == -1 ? NAN : ref->pkt_pos;
963 FF_ENABLE_DEPRECATION_WARNINGS
964 #endif
965  }
966  }
967 
968  ret = scale_frame(ctx->inputs[0], &in, &out);
969  if (ret < 0)
970  goto err;
971 
972  av_assert0(out);
973  out->pts = av_rescale_q(fs->pts, fs->time_base, outlink->time_base);
974  return ff_filter_frame(outlink, out);
975 
976 err:
977  av_frame_free(&in);
978  return ret;
979 }
980 
981 static int filter_frame(AVFilterLink *link, AVFrame *in)
982 {
983  AVFilterContext *ctx = link->dst;
984  AVFilterLink *outlink = ctx->outputs[0];
985  AVFrame *out;
986  int ret;
987 
988  ret = scale_frame(link, &in, &out);
989  if (out)
990  return ff_filter_frame(outlink, out);
991 
992  return ret;
993 }
994 
995 static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
996 {
997  FilterLink *l = ff_filter_link(link);
998  ScaleContext *scale = link->dst->priv;
999  AVFilterLink *outlink = link->dst->outputs[1];
1000  int frame_changed;
1001 
1002  frame_changed = in->width != link->w ||
1003  in->height != link->h ||
1004  in->format != link->format ||
1005  in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
1006  in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
1007  in->colorspace != link->colorspace ||
1008  in->color_range != link->color_range;
1009 
1010  if (frame_changed) {
1011  link->format = in->format;
1012  link->w = in->width;
1013  link->h = in->height;
1014  link->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
1015  link->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
1016  link->colorspace = in->colorspace;
1017  link->color_range = in->color_range;
1018 
1019  config_props_ref(outlink);
1020  }
1021 
1022  if (scale->eval_mode == EVAL_MODE_FRAME) {
1023  scale->var_values[VAR_N] = l->frame_count_out;
1024  scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
1025 #if FF_API_FRAME_PKT
1026 FF_DISABLE_DEPRECATION_WARNINGS
1027  scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
1028 FF_ENABLE_DEPRECATION_WARNINGS
1029 #endif
1030  }
1031 
1032  return ff_filter_frame(outlink, in);
1033 }
1034 
1035 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
1036  char *res, int res_len, int flags)
1037 {
1038  ScaleContext *scale = ctx->priv;
1039  char *str_expr;
1040  AVExpr **pexpr_ptr;
1041  int ret, w, h;
1042 
1043  w = !strcmp(cmd, "width") || !strcmp(cmd, "w");
1044  h = !strcmp(cmd, "height") || !strcmp(cmd, "h");
1045 
1046  if (w || h) {
1047  str_expr = w ? scale->w_expr : scale->h_expr;
1048  pexpr_ptr = w ? &scale->w_pexpr : &scale->h_pexpr;
1049 
1050  ret = scale_parse_expr(ctx, str_expr, pexpr_ptr, cmd, args);
1051  } else
1052  ret = AVERROR(ENOSYS);
1053 
1054  if (ret < 0)
1055  av_log(ctx, AV_LOG_ERROR, "Failed to process command. Continuing with existing parameters.\n");
1056 
1057  return ret;
1058 }
1059 
1060 static int activate(AVFilterContext *ctx)
1061 {
1062  ScaleContext *scale = ctx->priv;
1063  return ff_framesync_activate(&scale->fs);
1064 }
1065 
1066 static const AVClass *child_class_iterate(void **iter)
1067 {
1068  switch ((uintptr_t) *iter) {
1069  case 0:
1070  *iter = (void*)(uintptr_t) 1;
1071  return sws_get_class();
1072  case 1:
1073  *iter = (void*)(uintptr_t) 2;
1074  return &ff_framesync_class;
1075  }
1076 
1077  return NULL;
1078 }
1079 
1080 static void *child_next(void *obj, void *prev)
1081 {
1082  ScaleContext *s = obj;
1083  if (!prev)
1084  return s->sws;
1085  if (prev == s->sws)
1086  return &s->fs;
1087  return NULL;
1088 }
1089 
1090 #define OFFSET(x) offsetof(ScaleContext, x)
1091 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
1092 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
1093 
1094 static const AVOption scale_options[] = {
1095  { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1096  { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1097  { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1098  { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1099  { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "" }, .flags = FLAGS },
1100  { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
1101  { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
1102  { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
1103  { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_SPC_NB-1, .flags = FLAGS, .unit = "color" },
1104  { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_INT, { .i64 = AVCOL_SPC_UNSPECIFIED }, 0, AVCOL_SPC_NB-1, .flags = FLAGS, .unit = "color"},
1105  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "color" },
1106  { "bt601", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1107  { "bt470", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1108  { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1109  { "bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709}, 0, 0, FLAGS, .unit = "color" },
1110  { "fcc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_FCC}, 0, 0, FLAGS, .unit = "color" },
1111  { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE240M}, 0, 0, FLAGS, .unit = "color" },
1112  { "bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, 0, 0, FLAGS, .unit = "color" },
1113  { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
1114  { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
1115  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
1116  { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
1117  { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1118  { "limited", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1119  { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1120  { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1121  { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1122  { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1123  { "in_chroma_loc", "set input chroma sample location", OFFSET(in_chroma_loc), AV_OPT_TYPE_INT, { .i64 = AVCHROMA_LOC_UNSPECIFIED }, 0, AVCHROMA_LOC_NB-1, .flags = FLAGS, .unit = "chroma_loc" },
1124  { "out_chroma_loc", "set output chroma sample location", OFFSET(out_chroma_loc), AV_OPT_TYPE_INT, { .i64 = AVCHROMA_LOC_UNSPECIFIED }, 0, AVCHROMA_LOC_NB-1, .flags = FLAGS, .unit = "chroma_loc" },
1125  {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "chroma_loc"},
1126  {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "chroma_loc"},
1127  {"left", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_LEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1128  {"center", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_CENTER}, 0, 0, FLAGS, .unit = "chroma_loc"},
1129  {"topleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOPLEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1130  {"top", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOP}, 0, 0, FLAGS, .unit = "chroma_loc"},
1131  {"bottomleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOMLEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1132  {"bottom", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOM}, 0, 0, FLAGS, .unit = "chroma_loc"},
1133  { "in_primaries", "set input primaries", OFFSET(in_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_PRI_NB-1, .flags = FLAGS, .unit = "primaries" },
1134  { "out_primaries", "set output primaries", OFFSET(out_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_PRI_NB-1, .flags = FLAGS, .unit = "primaries"},
1135  {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "primaries"},
1136  {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT709}, 0, 0, FLAGS, .unit = "primaries"},
1137  {"bt470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470M}, 0, 0, FLAGS, .unit = "primaries"},
1138  {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470BG}, 0, 0, FLAGS, .unit = "primaries"},
1139  {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE170M}, 0, 0, FLAGS, .unit = "primaries"},
1140  {"smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE240M}, 0, 0, FLAGS, .unit = "primaries"},
1141  {"film", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_FILM}, 0, 0, FLAGS, .unit = "primaries"},
1142  {"bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT2020}, 0, 0, FLAGS, .unit = "primaries"},
1143  {"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE428}, 0, 0, FLAGS, .unit = "primaries"},
1144  {"smpte431", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE431}, 0, 0, FLAGS, .unit = "primaries"},
1145  {"smpte432", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE432}, 0, 0, FLAGS, .unit = "primaries"},
1146  {"jedec-p22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_JEDEC_P22}, 0, 0, FLAGS, .unit = "primaries"},
1147  {"ebu3213", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_EBU3213}, 0, 0, FLAGS, .unit = "primaries"},
1148  { "in_transfer", "set output color transfer", OFFSET(in_transfer), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_TRC_NB-1, .flags = FLAGS, .unit = "transfer"},
1149  {"out_transfer", "set output color transfer", OFFSET(out_transfer), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_TRC_NB-1, .flags = FLAGS, .unit = "transfer"},
1150  {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "transfer"},
1151  {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709}, 0, 0, FLAGS, .unit = "transfer"},
1152  {"bt470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA22}, 0, 0, FLAGS, .unit = "transfer"},
1153  {"gamma22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA22}, 0, 0, FLAGS, .unit = "transfer"},
1154  {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA28}, 0, 0, FLAGS, .unit = "transfer"},
1155  {"gamma28", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA28}, 0, 0, FLAGS, .unit = "transfer"},
1156  {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE170M}, 0, 0, FLAGS, .unit = "transfer"},
1157  {"smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE240M}, 0, 0, FLAGS, .unit = "transfer"},
1158  {"linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_LINEAR}, 0, 0, FLAGS, .unit = "transfer"},
1159  {"iec61966-2-1", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_1}, 0, 0, FLAGS, .unit = "transfer"},
1160  {"srgb", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_1}, 0, 0, FLAGS, .unit = "transfer"},
1161  {"iec61966-2-4", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_4}, 0, 0, FLAGS, .unit = "transfer"},
1162  {"xvycc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_4}, 0, 0, FLAGS, .unit = "transfer"},
1163  {"bt1361e", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT1361_ECG}, 0, 0, FLAGS, .unit = "transfer"},
1164  {"bt2020-10", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_10}, 0, 0, FLAGS, .unit = "transfer"},
1165  {"bt2020-12", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_12}, 0, 0, FLAGS, .unit = "transfer"},
1166  {"smpte2084", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084}, 0, 0, FLAGS, .unit = "transfer"},
1167  {"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE428}, 0, 0, FLAGS, .unit = "transfer"},
1168  {"arib-std-b67", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67}, 0, 0, FLAGS, .unit = "transfer"},
1169  { "in_v_chr_pos", "input vertical chroma position in luma grid/256" , OFFSET(in_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
1170  { "in_h_chr_pos", "input horizontal chroma position in luma grid/256", OFFSET(in_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
1171  { "out_v_chr_pos", "output vertical chroma position in luma grid/256" , OFFSET(out_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
1172  { "out_h_chr_pos", "output horizontal chroma position in luma grid/256", OFFSET(out_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS },
1173  { "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, .unit = "force_oar" },
1174  { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, .unit = "force_oar" },
1175  { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, .unit = "force_oar" },
1176  { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, .unit = "force_oar" },
1177  { "force_divisible_by", "enforce that the output resolution is divisible by a defined integer when force_original_aspect_ratio is used", OFFSET(force_divisible_by), AV_OPT_TYPE_INT, { .i64 = 1}, 1, 256, FLAGS },
1178  { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1179  { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1180  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, .unit = "eval" },
1181  { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
1182  { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
1183  { NULL }
1184 };
1185 
1186 static const AVClass scale_class = {
1187  .class_name = "scale",
1188  .item_name = av_default_item_name,
1189  .option = scale_options,
1190  .version = LIBAVUTIL_VERSION_INT,
1191  .category = AV_CLASS_CATEGORY_FILTER,
1192  .child_class_iterate = child_class_iterate,
1193  .child_next = child_next,
1194 };
1195 
1196 static const AVFilterPad avfilter_vf_scale_inputs[] = {
1197  {
1198  .name = "default",
1199  .type = AVMEDIA_TYPE_VIDEO,
1200  },
1201 };
1202 
1203 static const AVFilterPad avfilter_vf_scale_outputs[] = {
1204  {
1205  .name = "default",
1206  .type = AVMEDIA_TYPE_VIDEO,
1207  .config_props = config_props,
1208  },
1209 };
1210 
1211 const FFFilter ff_vf_scale = {
1212  .p.name = "scale",
1213  .p.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
1214  .p.priv_class = &scale_class,
1215  .p.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
1216  .preinit = preinit,
1217  .init = init,
1218  .uninit = uninit,
1219  .priv_size = sizeof(ScaleContext),
1220  FILTER_INPUTS(avfilter_vf_scale_inputs),
1221  FILTER_OUTPUTS(avfilter_vf_scale_outputs),
1222  FILTER_QUERY_FUNC2(query_formats),
1223  .activate = activate,
1224  .process_command = process_command,
1225 };
1226 
1227 static const AVClass *scale2ref_child_class_iterate(void **iter)
1228 {
1229  const AVClass *c = *iter ? NULL : sws_get_class();
1230  *iter = (void*)(uintptr_t)c;
1231  return c;
1232 }
1233 
1234 static void *scale2ref_child_next(void *obj, void *prev)
1235 {
1236  ScaleContext *s = obj;
1237  if (!prev)
1238  return s->sws;
1239  return NULL;
1240 }
1241 
1242 static const AVClass scale2ref_class = {
1243  .class_name = "scale(2ref)",
1244  .item_name = av_default_item_name,
1245  .option = scale_options,
1246  .version = LIBAVUTIL_VERSION_INT,
1247  .category = AV_CLASS_CATEGORY_FILTER,
1248  .child_class_iterate = scale2ref_child_class_iterate,
1249  .child_next = scale2ref_child_next,
1250 };
1251 
1252 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
1253  {
1254  .name = "default",
1255  .type = AVMEDIA_TYPE_VIDEO,
1256  .filter_frame = filter_frame,
1257  },
1258  {
1259  .name = "ref",
1260  .type = AVMEDIA_TYPE_VIDEO,
1261  .filter_frame = filter_frame_ref,
1262  },
1263 };
1264 
1265 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
1266  {
1267  .name = "default",
1268  .type = AVMEDIA_TYPE_VIDEO,
1269  .config_props = config_props,
1270  .request_frame= request_frame,
1271  },
1272  {
1273  .name = "ref",
1274  .type = AVMEDIA_TYPE_VIDEO,
1275  .config_props = config_props_ref,
1276  .request_frame= request_frame_ref,
1277  },
1278 };
1279 
1280 const FFFilter ff_vf_scale2ref = {
1281  .p.name = "scale2ref",
1282  .p.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
1283  .p.priv_class = &scale2ref_class,
1284  .preinit = preinit,
1285  .init = init,
1286  .uninit = uninit,
1287  .priv_size = sizeof(ScaleContext),
1288  FILTER_INPUTS(avfilter_vf_scale2ref_inputs),
1289  FILTER_OUTPUTS(avfilter_vf_scale2ref_outputs),
1290  FILTER_QUERY_FUNC2(query_formats),
1291  .process_command = process_command,
1292 };
filter_frame_ref
static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
Definition: vf_scale.c:995
ScaleContext::param
double param[2]
Definition: vf_scale.c:146
VAR_S2R_MAIN_SAR
@ VAR_S2R_MAIN_SAR
Definition: vf_scale.c:117
formats
formats
Definition: signature.h:47
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:116
ScaleContext::fs
FFFrameSync fs
Definition: vf_scale.c:136
AVFrame::color_trc
enum AVColorTransferCharacteristic color_trc
Definition: frame.h:694
VAR_S2R_MAIN_A
@ VAR_S2R_MAIN_A
Definition: vf_scale.c:116
VAR_HSUB
@ VAR_HSUB
Definition: vf_scale.c:95
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
config_props_ref
static int config_props_ref(AVFilterLink *outlink)
Definition: vf_scale.c:716
ff_framesync_configure
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:137
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:215
AVFrame::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:690
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
TFLAGS
#define TFLAGS
Definition: vf_scale.c:1092
AVCOL_PRI_EBU3213
@ AVCOL_PRI_EBU3213
EBU Tech. 3213-E (nothing there) / one of JEDEC P22 group phosphors.
Definition: pixfmt.h:602
check_exprs
static int check_exprs(AVFilterContext *ctx)
Definition: vf_scale.c:189
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
var_name
var_name
Definition: noise.c:47
ScaleContext::in_primaries
int in_primaries
Definition: vf_scale.c:163
VAR_REF_POS
@ VAR_REF_POS
Definition: vf_scale.c:113
ff_framesync_uninit
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:301
out
FILE * out
Definition: movenc.c:55
ScaleContext
Definition: vf_scale.c:133
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1062
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3170
AVCOL_TRC_LINEAR
@ AVCOL_TRC_LINEAR
"Linear transfer characteristics"
Definition: pixfmt.h:620
AVCHROMA_LOC_BOTTOM
@ AVCHROMA_LOC_BOTTOM
Definition: pixfmt.h:743
ScaleContext::force_divisible_by
int force_divisible_by
Definition: vf_scale.c:178
VAR_REF_N
@ VAR_REF_N
Definition: vf_scale.c:111
ff_framesync_get_frame
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:269
avfilter_vf_scale2ref_outputs
static const AVFilterPad avfilter_vf_scale2ref_outputs[]
Definition: vf_scale.c:1265
FLAGS
#define FLAGS
Definition: vf_scale.c:1091
int64_t
long long int64_t
Definition: coverity.c:34
ScaleContext::flags_str
char * flags_str
Definition: vf_scale.c:159
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
AVFrame::color_primaries
enum AVColorPrimaries color_primaries
Definition: frame.h:692
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
AVFrame::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:701
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:262
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:403
AVCOL_TRC_NB
@ AVCOL_TRC_NB
Not part of ABI.
Definition: pixfmt.h:633
pixdesc.h
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:515
AVFrame::width
int width
Definition: frame.h:475
w
uint8_t w
Definition: llviddspenc.c:38
AVCOL_RANGE_JPEG
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:717
VAR_A
@ VAR_A
Definition: vf_scale.c:92
request_frame_ref
static int request_frame_ref(AVFilterLink *outlink)
Definition: vf_scale.c:738
sws_test_primaries
int sws_test_primaries(enum AVColorPrimaries primaries, int output)
Test if a given set of color primaries is supported.
Definition: utils.c:2924
AVOption
AVOption.
Definition: opt.h:429
AVCOL_SPC_NB
@ AVCOL_SPC_NB
Not part of ABI.
Definition: pixfmt.h:660
scale_parse_expr
static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
Definition: vf_scale.c:281
scale2ref_class
static const AVClass scale2ref_class
Definition: vf_scale.c:1242
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: vf_scale.c:733
av_pix_fmt_desc_next
const AVPixFmtDescriptor * av_pix_fmt_desc_next(const AVPixFmtDescriptor *prev)
Iterate over all pixel format descriptors known to libavutil.
Definition: pixdesc.c:3177
VAR_REF_T
@ VAR_REF_T
Definition: vf_scale.c:112
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:475
VAR_S2R_MAIN_HSUB
@ VAR_S2R_MAIN_HSUB
Definition: vf_scale.c:119
ScaleContext::var_values
double var_values[VARS_NB]
Definition: vf_scale.c:157
ScaleContext::out_range
int out_range
Definition: vf_scale.c:168
AVCOL_PRI_JEDEC_P22
@ AVCOL_PRI_JEDEC_P22
Definition: pixfmt.h:603
VAR_S2R_MDAR
@ VAR_S2R_MDAR
Definition: vf_scale.c:118
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:225
float.h
AVCOL_TRC_BT2020_12
@ AVCOL_TRC_BT2020_12
ITU-R BT2020 for 12-bit system.
Definition: pixfmt.h:627
EVAL_MODE_FRAME
@ EVAL_MODE_FRAME
Definition: vf_scale.c:129
VAR_S2R_MAIN_H
@ VAR_S2R_MAIN_H
Definition: vf_scale.c:115
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:683
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:203
FFFrameSync
Frame sync structure.
Definition: framesync.h:168
EXT_INFINITY
@ EXT_INFINITY
Extend the frame to infinity.
Definition: framesync.h:75
ScaleContext::in_h_chr_pos
int in_h_chr_pos
Definition: vf_scale.c:174
VAR_OUT_H
@ VAR_OUT_H
Definition: vf_scale.c:91
video.h
ff_make_formats_list_singleton
AVFilterFormats * ff_make_formats_list_singleton(int fmt)
Equivalent to ff_make_format_list({const int[]}{ fmt, -1 })
Definition: formats.c:529
ScaleContext::out_chroma_loc
int out_chroma_loc
Definition: vf_scale.c:171
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
av_expr_parse
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:710
VAR_S2R_MAIN_POS
@ VAR_S2R_MAIN_POS
Definition: vf_scale.c:123
AVFrame::chroma_location
enum AVChromaLocation chroma_location
Definition: frame.h:703
AVCOL_SPC_BT470BG
@ AVCOL_SPC_BT470BG
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
Definition: pixfmt.h:646
EXT_STOP
@ EXT_STOP
Completely stop all streams with this one.
Definition: framesync.h:65
ff_append_inpad
int ff_append_inpad(AVFilterContext *f, AVFilterPad *p)
Append a new input/output pad to the filter's list of such pads.
Definition: avfilter.c:127
AVCOL_TRC_IEC61966_2_1
@ AVCOL_TRC_IEC61966_2_1
IEC 61966-2-1 (sRGB or sYCC)
Definition: pixfmt.h:625
av_color_space_name
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:3546
VAR_DAR
@ VAR_DAR
Definition: vf_scale.c:94
avfilter_vf_scale_inputs
static const AVFilterPad avfilter_vf_scale_inputs[]
Definition: vf_scale.c:1196
fail
#define fail()
Definition: checkasm.h:193
VARS_NB
@ VARS_NB
Definition: vf_scale.c:124
AVCOL_TRC_GAMMA28
@ AVCOL_TRC_GAMMA28
also ITU-R BT470BG
Definition: pixfmt.h:617
VAR_REF_A
@ VAR_REF_A
Definition: vf_scale.c:106
ScaleContext::eval_mode
int eval_mode
expression evaluation mode
Definition: vf_scale.c:180
EXT_NULL
@ EXT_NULL
Ignore this stream and continue processing the other ones.
Definition: framesync.h:70
VAR_IN_H
@ VAR_IN_H
Definition: vf_scale.c:89
EVAL_MODE_NB
@ EVAL_MODE_NB
Definition: vf_scale.c:130
ScaleContext::in_chroma_loc
int in_chroma_loc
Definition: vf_scale.c:170
sws_get_class
const AVClass * sws_get_class(void)
Get the AVClass for SwsContext.
Definition: options.c:106
av_opt_set
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:835
VAR_REF_W
@ VAR_REF_W
Definition: vf_scale.c:104
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:139
av_reduce
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:358
AVRational::num
int num
Numerator.
Definition: rational.h:59
OFFSET
#define OFFSET(x)
Definition: vf_scale.c:1090
AV_SIDE_DATA_PROP_SIZE_DEPENDENT
@ AV_SIDE_DATA_PROP_SIZE_DEPENDENT
Side data depends on the video dimensions.
Definition: frame.h:292
AVCOL_TRC_GAMMA22
@ AVCOL_TRC_GAMMA22
also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
Definition: pixfmt.h:616
preinit
static av_cold int preinit(AVFilterContext *ctx)
Definition: vf_scale.c:334
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
activate
static int activate(AVFilterContext *ctx)
Definition: vf_scale.c:1060
AV_PIX_FMT_BGR8
@ AV_PIX_FMT_BGR8
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:90
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
VAR_REF_H
@ VAR_REF_H
Definition: vf_scale.c:105
scale2ref_child_next
static void * scale2ref_child_next(void *obj, void *prev)
Definition: vf_scale.c:1234
FFFilter
Definition: filters.h:265
s
#define s(width, name)
Definition: cbs_vp9.c:198
VAR_OH
@ VAR_OH
Definition: vf_scale.c:91
AVCHROMA_LOC_TOP
@ AVCHROMA_LOC_TOP
Definition: pixfmt.h:741
AVCOL_PRI_NB
@ AVCOL_PRI_NB
Not part of ABI.
Definition: pixfmt.h:604
ScaleContext::out_primaries
int out_primaries
Definition: vf_scale.c:164
VAR_S2R_MAIN_W
@ VAR_S2R_MAIN_W
Definition: vf_scale.c:114
AVCOL_TRC_BT1361_ECG
@ AVCOL_TRC_BT1361_ECG
ITU-R BT1361 Extended Colour Gamut.
Definition: pixfmt.h:624
ScaleContext::slice_y
int slice_y
top of current output slice
Definition: vf_scale.c:149
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demux_decode.c:41
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Underlying C type is double.
Definition: opt.h:267
av_expr_count_vars
int av_expr_count_vars(AVExpr *e, unsigned *counter, int size)
Track the presence of variables and their number of occurrences in a parsed expression.
Definition: eval.c:782
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition: vf_scale.c:475
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:678
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_scale.c:352
VAR_OVSUB
@ VAR_OVSUB
Definition: vf_scale.c:98
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
filters.h
ScaleContext::uses_ref
int uses_ref
Definition: vf_scale.c:151
sws_test_colorspace
int sws_test_colorspace(enum AVColorSpace colorspace, int output)
Test if a given color space is supported.
Definition: utils.c:2907
ctx
AVFormatContext * ctx
Definition: movenc.c:49
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_scale.c:1035
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:792
AVCOL_PRI_SMPTE428
@ AVCOL_PRI_SMPTE428
SMPTE ST 428-1 (CIE 1931 XYZ)
Definition: pixfmt.h:598
av_rescale_q
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
AVExpr
Definition: eval.c:158
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
AVCOL_PRI_SMPTE240M
@ AVCOL_PRI_SMPTE240M
identical to above, also called "SMPTE C" even though it uses D65
Definition: pixfmt.h:595
ScaleContext::w_pexpr
AVExpr * w_pexpr
Definition: vf_scale.c:155
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
avpriv_set_systematic_pal2
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:178
NAN
#define NAN
Definition: mathematics.h:115
link
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a link
Definition: filter_design.txt:23
AVCOL_PRI_BT470BG
@ AVCOL_PRI_BT470BG
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
Definition: pixfmt.h:593
AVCOL_PRI_SMPTE170M
@ AVCOL_PRI_SMPTE170M
also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
Definition: pixfmt.h:594
ScaleContext::out_h_chr_pos
int out_h_chr_pos
Definition: vf_scale.c:172
av_color_range_name
const char * av_color_range_name(enum AVColorRange range)
Definition: pixdesc.c:3486
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
VAR_REF_DAR
@ VAR_REF_DAR
Definition: vf_scale.c:108
ff_framesync_class
const AVClass ff_framesync_class
Definition: framesync.c:54
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:75
NULL
#define NULL
Definition: coverity.c:32
ScaleContext::out_v_chr_pos
int out_v_chr_pos
Definition: vf_scale.c:173
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:726
VAR_POS
@ VAR_POS
Definition: noise.c:56
VAR_T
@ VAR_T
Definition: vf_scale.c:100
fs
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:200
AVCHROMA_LOC_LEFT
@ AVCHROMA_LOC_LEFT
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:738
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVCHROMA_LOC_TOPLEFT
@ AVCHROMA_LOC_TOPLEFT
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:740
sws_is_noop
int sws_is_noop(const AVFrame *dst, const AVFrame *src)
Check if a given conversion is a noop.
Definition: utils.c:2971
AVCOL_TRC_IEC61966_2_4
@ AVCOL_TRC_IEC61966_2_4
IEC 61966-2-4.
Definition: pixfmt.h:623
isnan
#define isnan(x)
Definition: libm.h:340
scale2ref_child_class_iterate
static const AVClass * scale2ref_child_class_iterate(void **iter)
Definition: vf_scale.c:1227
ScaleContext::in_range
int in_range
Definition: vf_scale.c:167
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:265
VAR_IN_W
@ VAR_IN_W
Definition: vf_scale.c:88
AVCOL_PRI_BT709
@ AVCOL_PRI_BT709
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP 177 Annex B
Definition: pixfmt.h:588
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
ff_add_format
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:504
parseutils.h
sws_test_format
int sws_test_format(enum AVPixelFormat format, int output)
Test if a given pixel format is supported.
Definition: utils.c:2902
ScaleContext::h_pexpr
AVExpr * h_pexpr
Definition: vf_scale.c:156
av_color_primaries_name
const char * av_color_primaries_name(enum AVColorPrimaries primaries)
Definition: pixdesc.c:3504
double
double
Definition: af_crystalizer.c:132
AVCOL_TRC_BT2020_10
@ AVCOL_TRC_BT2020_10
ITU-R BT2020 for 10-bit system.
Definition: pixfmt.h:626
ScaleContext::out_transfer
int out_transfer
Definition: vf_scale.c:166
ff_all_color_spaces
AVFilterFormats * ff_all_color_spaces(void)
Construct an AVFilterFormats representing all possible color spaces.
Definition: formats.c:630
AVCOL_RANGE_UNSPECIFIED
@ AVCOL_RANGE_UNSPECIFIED
Definition: pixfmt.h:683
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVFilterFormatsConfig
Lists of formats / etc.
Definition: avfilter.h:109
ScaleContext::out_color_matrix
int out_color_matrix
Definition: vf_scale.c:162
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:197
AV_CLASS_CATEGORY_FILTER
@ AV_CLASS_CATEGORY_FILTER
Definition: log.h:36
AVCOL_PRI_BT2020
@ AVCOL_PRI_BT2020
ITU-R BT2020.
Definition: pixfmt.h:597
VAR_IW
@ VAR_IW
Definition: vf_scale.c:88
ScaleContext::in_transfer
int in_transfer
Definition: vf_scale.c:165
ScaleContext::sws
SwsContext * sws
Definition: vf_scale.c:135
AVCOL_TRC_SMPTE2084
@ AVCOL_TRC_SMPTE2084
SMPTE ST 2084 for 10-, 12-, 14- and 16-bit systems.
Definition: pixfmt.h:628
AVCOL_PRI_SMPTE431
@ AVCOL_PRI_SMPTE431
SMPTE ST 431-2 (2011) / DCI P3.
Definition: pixfmt.h:600
eval.h
VAR_IH
@ VAR_IH
Definition: vf_scale.c:89
VAR_REF_SAR
@ VAR_REF_SAR
Definition: vf_scale.c:107
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
AVCOL_TRC_SMPTE240M
@ AVCOL_TRC_SMPTE240M
Definition: pixfmt.h:619
AVCOL_PRI_FILM
@ AVCOL_PRI_FILM
colour filters using Illuminant C
Definition: pixfmt.h:596
sws_alloc_context
SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext and set its fields to default values.
Definition: utils.c:1253
AVClass::child_next
void *(* child_next)(void *obj, void *prev)
Return next AVOptions-enabled child or NULL.
Definition: log.h:149
child_class_iterate
static const AVClass * child_class_iterate(void **iter)
Definition: vf_scale.c:1066
ScaleContext::w
int w
New dimensions.
Definition: vf_scale.c:144
AVFrame::time_base
AVRational time_base
Time base for the timestamps in this frame.
Definition: frame.h:530
scale_frame
static int scale_frame(AVFilterLink *link, AVFrame **frame_in, AVFrame **frame_out)
Definition: vf_scale.c:744
VAR_RH
@ VAR_RH
Definition: vf_scale.c:105
TS2T
#define TS2T(ts, tb)
Definition: filters.h:481
AVCHROMA_LOC_UNSPECIFIED
@ AVCHROMA_LOC_UNSPECIFIED
Definition: pixfmt.h:737
AVFrame::pkt_pos
attribute_deprecated int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:721
IS_SCALE2REF
#define IS_SCALE2REF(ctx)
Definition: vf_scale.c:185
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:490
scale_eval.h
VAR_RW
@ VAR_RW
Definition: vf_scale.c:104
FF_API_FRAME_PKT
#define FF_API_FRAME_PKT
Definition: version.h:109
ScaleContext::hsub
int hsub
Definition: vf_scale.c:148
VAR_OUT_W
@ VAR_OUT_W
Definition: vf_scale.c:90
imgutils_internal.h
sws_test_transfer
int sws_test_transfer(enum AVColorTransferCharacteristic trc, int output)
Test if a given color transfer function is supported.
Definition: utils.c:2930
ff_all_color_ranges
AVFilterFormats * ff_all_color_ranges(void)
Construct an AVFilterFormats representing all possible color ranges.
Definition: formats.c:646
av_pix_fmt_desc_get_id
enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc)
Definition: pixdesc.c:3189
filter_frame
static int filter_frame(AVFilterLink *link, AVFrame *in)
Definition: vf_scale.c:981
av_parse_video_size
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str)
Parse str and put in width_ptr and height_ptr the detected values.
Definition: parseutils.c:150
av_frame_side_data_remove_by_props
void av_frame_side_data_remove_by_props(AVFrameSideData ***sd, int *nb_sd, int props)
Remove and free all side data instances that match any of the given side data properties.
Definition: frame.c:963
AVCOL_TRC_BT709
@ AVCOL_TRC_BT709
also ITU-R BT1361
Definition: pixfmt.h:613
AVCOL_SPC_SMPTE240M
@ AVCOL_SPC_SMPTE240M
derived from 170M primaries and D65 white point, 170M is derived from BT470 System M's primaries
Definition: pixfmt.h:648
ScaleContext::vsub
int vsub
chroma subsampling
Definition: vf_scale.c:148
config_props
static int config_props(AVFilterLink *outlink)
Definition: vf_scale.c:639
interlaced
uint8_t interlaced
Definition: mxfenc.c:2270
VAR_SAR
@ VAR_SAR
Definition: vf_scale.c:93
VAR_RDAR
@ VAR_RDAR
Definition: vf_scale.c:108
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVCOL_SPC_BT2020_NCL
@ AVCOL_SPC_BT2020_NCL
ITU-R BT2020 non-constant luminance system.
Definition: pixfmt.h:651
VAR_S2R_MAIN_N
@ VAR_S2R_MAIN_N
Definition: vf_scale.c:121
internal.h
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:841
EvalMode
EvalMode
Definition: af_volume.h:39
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition: filters.h:239
AVFilterPad::name
const char * name
Pad name.
Definition: filters.h:44
AVCOL_SPC_UNSPECIFIED
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:643
ScaleContext::h_expr
char * h_expr
height expression string
Definition: vf_scale.c:154
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:662
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:700
AV_SIDE_DATA_PROP_COLOR_DEPENDENT
@ AV_SIDE_DATA_PROP_COLOR_DEPENDENT
Side data depends on the video color space.
Definition: frame.h:299
avfilter_vf_scale_outputs
static const AVFilterPad avfilter_vf_scale_outputs[]
Definition: vf_scale.c:1203
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:84
AVCOL_PRI_BT470M
@ AVCOL_PRI_BT470M
also FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:591
ret
ret
Definition: filter_design.txt:187
pixfmt.h
FFSWAP
#define FFSWAP(type, a, b)
Definition: macros.h:52
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:80
ScaleContext::in_color_matrix
int in_color_matrix
Definition: vf_scale.c:161
VAR_REF_HSUB
@ VAR_REF_HSUB
Definition: vf_scale.c:109
child_next
static void * child_next(void *obj, void *prev)
Definition: vf_scale.c:1080
ff_framesync_init
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:86
AVFrame::sample_aspect_ratio
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:510
ff_scale_adjust_dimensions
int ff_scale_adjust_dimensions(AVFilterLink *inlink, int *ret_w, int *ret_h, int force_original_aspect_ratio, int force_divisible_by)
Transform evaluated width and height obtained from ff_scale_eval_dimensions into actual target width ...
Definition: scale_eval.c:113
VAR_S2R_MAIN_T
@ VAR_S2R_MAIN_T
Definition: vf_scale.c:122
scale_eval_dimensions
static int scale_eval_dimensions(AVFilterContext *ctx)
Definition: vf_scale.c:550
var_names
static const char *const var_names[]
Definition: vf_scale.c:46
AVFrame::height
int height
Definition: frame.h:475
VAR_S2R_MAIN_DAR
@ VAR_S2R_MAIN_DAR
Definition: vf_scale.c:118
scale_options
static const AVOption scale_options[]
Definition: vf_scale.c:1094
AVCOL_TRC_ARIB_STD_B67
@ AVCOL_TRC_ARIB_STD_B67
ARIB STD-B67, known as "Hybrid log-gamma".
Definition: pixfmt.h:632
framesync.h
do_scale
static int do_scale(FFFrameSync *fs)
Definition: vf_scale.c:913
AVCHROMA_LOC_CENTER
@ AVCHROMA_LOC_CENTER
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:739
AVRational::den
int den
Denominator.
Definition: rational.h:60
AVCOL_SPC_FCC
@ AVCOL_SPC_FCC
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:645
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_scale.c:465
ScaleContext::force_original_aspect_ratio
int force_original_aspect_ratio
Definition: vf_scale.c:177
ref
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:117
AVCOL_TRC_SMPTE170M
@ AVCOL_TRC_SMPTE170M
also ITU-R BT601-6 525 or 625 / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
Definition: pixfmt.h:618
avfilter_vf_scale2ref_inputs
static const AVFilterPad avfilter_vf_scale2ref_inputs[]
Definition: vf_scale.c:1252
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
AVFilterContext
An instance of a filter.
Definition: avfilter.h:257
VAR_OW
@ VAR_OW
Definition: vf_scale.c:90
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:272
desc
const char * desc
Definition: libsvtav1.c:79
VAR_VSUB
@ VAR_VSUB
Definition: vf_scale.c:96
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
FFFilter::p
AVFilter p
The public AVFilter.
Definition: filters.h:269
mem.h
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AVCOL_PRI_SMPTE432
@ AVCOL_PRI_SMPTE432
SMPTE ST 432-1 (2010) / P3 D65 / Display P3.
Definition: pixfmt.h:601
ScaleContext::interlaced
int interlaced
Definition: vf_scale.c:150
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
scale
static void scale(int *out, const int *in, const int w, const int h, const int shift)
Definition: intra.c:291
VAR_N
@ VAR_N
Definition: vf_scale.c:99
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
ff_vf_scale2ref
const FFFilter ff_vf_scale2ref
Definition: vf_scale.c:184
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
scale_class
static const AVClass scale_class
Definition: vf_scale.c:1186
ScaleContext::w_expr
char * w_expr
width expression string
Definition: vf_scale.c:153
ff_vf_scale
const FFFilter ff_vf_scale
Definition: vf_scale.c:1211
sws_free_context
void sws_free_context(SwsContext **ctx)
Free the context and everything associated with it, and write NULL to the provided pointer.
Definition: utils.c:2557
EVAL_MODE_INIT
@ EVAL_MODE_INIT
Definition: vf_scale.c:128
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
AVCHROMA_LOC_NB
@ AVCHROMA_LOC_NB
Not part of ABI.
Definition: pixfmt.h:744
av_opt_get
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:1215
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVCOL_TRC_SMPTE428
@ AVCOL_TRC_SMPTE428
SMPTE ST 428-1.
Definition: pixfmt.h:630
VAR_REF_VSUB
@ VAR_REF_VSUB
Definition: vf_scale.c:110
sws_scale_frame
int sws_scale_frame(SwsContext *sws, AVFrame *dst, const AVFrame *src)
Scale source data from src and write the output to dst.
Definition: swscale.c:1355
h
h
Definition: vp9dsp_template.c:2070
ff_framesync_activate
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:352
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition: opt.h:276
VAR_OHSUB
@ VAR_OHSUB
Definition: vf_scale.c:97
AVCOL_SPC_BT709
@ AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / derived in SMPTE RP 177 Annex B
Definition: pixfmt.h:642
SwsContext
Main external API structure.
Definition: swscale.h:182
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
snprintf
#define snprintf
Definition: snprintf.h:34
ScaleContext::size_str
char * size_str
Definition: vf_scale.c:145
av_color_transfer_name
const char * av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
Definition: pixdesc.c:3525
VAR_S2R_MAIN_VSUB
@ VAR_S2R_MAIN_VSUB
Definition: vf_scale.c:120
AVCHROMA_LOC_BOTTOMLEFT
@ AVCHROMA_LOC_BOTTOMLEFT
Definition: pixfmt.h:742
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
ff_framesync_preinit
void ff_framesync_preinit(FFFrameSync *fs)
Pre-initialize a frame sync structure.
Definition: framesync.c:78
swscale.h
ScaleContext::h
int h
Definition: vf_scale.c:144
av_x_if_null
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:312
av_get_pix_fmt_name
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:3090
ScaleContext::in_v_chr_pos
int in_v_chr_pos
Definition: vf_scale.c:175
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