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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 <stdio.h>
27 #include <string.h>
28 
29 #include "avfilter.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "video.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/eval.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/parseutils.h"
39 #include "libavutil/pixdesc.h"
40 #include "libavutil/imgutils.h"
41 #include "libavutil/avassert.h"
42 #include "libswscale/swscale.h"
43 
44 static const char *const var_names[] = {
45  "in_w", "iw",
46  "in_h", "ih",
47  "out_w", "ow",
48  "out_h", "oh",
49  "a",
50  "sar",
51  "dar",
52  "hsub",
53  "vsub",
54  "ohsub",
55  "ovsub",
56  NULL
57 };
58 
59 enum var_name {
72 };
73 
74 enum EvalMode {
78 };
79 
80 
81 typedef struct ScaleContext {
82  const AVClass *class;
83  struct SwsContext *sws; ///< software scaler context
84  struct SwsContext *isws[2]; ///< software scaler context for interlaced material
86 
87  /**
88  * New dimensions. Special values are:
89  * 0 = original width/height
90  * -1 = keep original aspect
91  * -N = try to keep aspect but make sure it is divisible by N
92  */
93  int w, h;
94  char *size_str;
95  unsigned int flags; ///sws flags
96  double param[2]; // sws params
97 
98  int hsub, vsub; ///< chroma subsampling
99  int slice_y; ///< top of current output slice
100  int input_is_pal; ///< set to 1 if the input format is paletted
101  int output_is_pal; ///< set to 1 if the output format is paletted
103 
104  char *w_expr; ///< width expression string
105  char *h_expr; ///< height expression string
106  char *flags_str;
107 
110 
111  int in_range;
113 
118 
120 
122 
123  int eval_mode; ///< expression evaluation mode
124 
125 } ScaleContext;
126 
128 
130 {
131  ScaleContext *scale = ctx->priv;
132  int ret;
133 
134  if (scale->size_str && (scale->w_expr || scale->h_expr)) {
135  av_log(ctx, AV_LOG_ERROR,
136  "Size and width/height expressions cannot be set at the same time.\n");
137  return AVERROR(EINVAL);
138  }
139 
140  if (scale->w_expr && !scale->h_expr)
141  FFSWAP(char *, scale->w_expr, scale->size_str);
142 
143  if (scale->size_str) {
144  char buf[32];
145  if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
146  av_log(ctx, AV_LOG_ERROR,
147  "Invalid size '%s'\n", scale->size_str);
148  return ret;
149  }
150  snprintf(buf, sizeof(buf)-1, "%d", scale->w);
151  av_opt_set(scale, "w", buf, 0);
152  snprintf(buf, sizeof(buf)-1, "%d", scale->h);
153  av_opt_set(scale, "h", buf, 0);
154  }
155  if (!scale->w_expr)
156  av_opt_set(scale, "w", "iw", 0);
157  if (!scale->h_expr)
158  av_opt_set(scale, "h", "ih", 0);
159 
160  av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
161  scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
162 
163  scale->flags = 0;
164 
165  if (scale->flags_str) {
166  const AVClass *class = sws_get_class();
167  const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
169  int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
170  if (ret < 0)
171  return ret;
172  }
173  scale->opts = *opts;
174  *opts = NULL;
175 
176  return 0;
177 }
178 
180 {
181  ScaleContext *scale = ctx->priv;
182  sws_freeContext(scale->sws);
183  sws_freeContext(scale->isws[0]);
184  sws_freeContext(scale->isws[1]);
185  scale->sws = NULL;
186  av_dict_free(&scale->opts);
187 }
188 
190 {
192  enum AVPixelFormat pix_fmt;
193  int ret;
194 
195  if (ctx->inputs[0]) {
196  const AVPixFmtDescriptor *desc = NULL;
197  formats = NULL;
198  while ((desc = av_pix_fmt_desc_next(desc))) {
199  pix_fmt = av_pix_fmt_desc_get_id(desc);
200  if ((sws_isSupportedInput(pix_fmt) ||
202  && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
203  return ret;
204  }
205  }
206  if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0)
207  return ret;
208  }
209  if (ctx->outputs[0]) {
210  const AVPixFmtDescriptor *desc = NULL;
211  formats = NULL;
212  while ((desc = av_pix_fmt_desc_next(desc))) {
213  pix_fmt = av_pix_fmt_desc_get_id(desc);
214  if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
216  && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
217  return ret;
218  }
219  }
220  if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0)
221  return ret;
222  }
223 
224  return 0;
225 }
226 
227 static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
228 {
229  if (!s)
230  s = "bt601";
231 
232  if (s && strstr(s, "bt709")) {
233  colorspace = AVCOL_SPC_BT709;
234  } else if (s && strstr(s, "fcc")) {
235  colorspace = AVCOL_SPC_FCC;
236  } else if (s && strstr(s, "smpte240m")) {
237  colorspace = AVCOL_SPC_SMPTE240M;
238  } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
239  colorspace = AVCOL_SPC_BT470BG;
240  } else if (s && strstr(s, "bt2020")) {
241  colorspace = AVCOL_SPC_BT2020_NCL;
242  }
243 
244  if (colorspace < 1 || colorspace > 10 || colorspace == 8) {
245  colorspace = AVCOL_SPC_BT470BG;
246  }
247 
248  return sws_getCoefficients(colorspace);
249 }
250 
251 static int config_props(AVFilterLink *outlink)
252 {
253  AVFilterContext *ctx = outlink->src;
254  AVFilterLink *inlink0 = outlink->src->inputs[0];
255  AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
256  outlink->src->inputs[1] :
257  outlink->src->inputs[0];
258  enum AVPixelFormat outfmt = outlink->format;
259  ScaleContext *scale = ctx->priv;
261  const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
262  int64_t w, h;
263  double var_values[VARS_NB], res;
264  char *expr;
265  int ret;
266  int factor_w, factor_h;
267 
268  var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
269  var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
270  var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
271  var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
272  var_values[VAR_A] = (double) inlink->w / inlink->h;
273  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
274  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
275  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
276  var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
277  var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
278  var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
279  var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
280 
281  /* evaluate width and height */
282  av_expr_parse_and_eval(&res, (expr = scale->w_expr),
283  var_names, var_values,
284  NULL, NULL, NULL, NULL, NULL, 0, ctx);
285  scale->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
286  if ((ret = av_expr_parse_and_eval(&res, (expr = scale->h_expr),
287  var_names, var_values,
288  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
289  goto fail;
290  scale->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
291  /* evaluate again the width, as it may depend on the output height */
292  if ((ret = av_expr_parse_and_eval(&res, (expr = scale->w_expr),
293  var_names, var_values,
294  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
295  goto fail;
296  scale->w = res;
297 
298  w = scale->w;
299  h = scale->h;
300 
301  /* Check if it is requested that the result has to be divisible by a some
302  * factor (w or h = -n with n being the factor). */
303  factor_w = 1;
304  factor_h = 1;
305  if (w < -1) {
306  factor_w = -w;
307  }
308  if (h < -1) {
309  factor_h = -h;
310  }
311 
312  if (w < 0 && h < 0)
313  scale->w = scale->h = 0;
314 
315  if (!(w = scale->w))
316  w = inlink->w;
317  if (!(h = scale->h))
318  h = inlink->h;
319 
320  /* Make sure that the result is divisible by the factor we determined
321  * earlier. If no factor was set, it is nothing will happen as the default
322  * factor is 1 */
323  if (w < 0)
324  w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w;
325  if (h < 0)
326  h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h;
327 
328  /* Note that force_original_aspect_ratio may overwrite the previous set
329  * dimensions so that it is not divisible by the set factors anymore. */
330  if (scale->force_original_aspect_ratio) {
331  int tmp_w = av_rescale(h, inlink->w, inlink->h);
332  int tmp_h = av_rescale(w, inlink->h, inlink->w);
333 
334  if (scale->force_original_aspect_ratio == 1) {
335  w = FFMIN(tmp_w, w);
336  h = FFMIN(tmp_h, h);
337  } else {
338  w = FFMAX(tmp_w, w);
339  h = FFMAX(tmp_h, h);
340  }
341  }
342 
343  if (w > INT_MAX || h > INT_MAX ||
344  (h * inlink->w) > INT_MAX ||
345  (w * inlink->h) > INT_MAX)
346  av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
347 
348  outlink->w = w;
349  outlink->h = h;
350 
351  /* TODO: make algorithm configurable */
352 
353  scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL ||
355  if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
358 
359  if (scale->sws)
360  sws_freeContext(scale->sws);
361  if (scale->isws[0])
362  sws_freeContext(scale->isws[0]);
363  if (scale->isws[1])
364  sws_freeContext(scale->isws[1]);
365  scale->isws[0] = scale->isws[1] = scale->sws = NULL;
366  if (inlink0->w == outlink->w &&
367  inlink0->h == outlink->h &&
368  !scale->out_color_matrix &&
369  scale->in_range == scale->out_range &&
370  inlink0->format == outlink->format)
371  ;
372  else {
373  struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
374  int i;
375 
376  for (i = 0; i < 3; i++) {
377  struct SwsContext **s = swscs[i];
378  *s = sws_alloc_context();
379  if (!*s)
380  return AVERROR(ENOMEM);
381 
382  av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
383  av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
384  av_opt_set_int(*s, "src_format", inlink0->format, 0);
385  av_opt_set_int(*s, "dstw", outlink->w, 0);
386  av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
387  av_opt_set_int(*s, "dst_format", outfmt, 0);
388  av_opt_set_int(*s, "sws_flags", scale->flags, 0);
389  av_opt_set_int(*s, "param0", scale->param[0], 0);
390  av_opt_set_int(*s, "param1", scale->param[1], 0);
391  if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
392  av_opt_set_int(*s, "src_range",
393  scale->in_range == AVCOL_RANGE_JPEG, 0);
394  if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
395  av_opt_set_int(*s, "dst_range",
396  scale->out_range == AVCOL_RANGE_JPEG, 0);
397 
398  if (scale->opts) {
399  AVDictionaryEntry *e = NULL;
400  while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
401  if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
402  return ret;
403  }
404  }
405  /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
406  * MPEG-2 chroma positions are used by convention
407  * XXX: support other 4:2:0 pixel formats */
408  if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) {
409  scale->in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
410  }
411 
412  if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) {
413  scale->out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
414  }
415 
416  av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
417  av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0);
418  av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
419  av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0);
420 
421  if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
422  return ret;
423  if (!scale->interlaced)
424  break;
425  }
426  }
427 
428  if (inlink->sample_aspect_ratio.num){
429  outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
430  } else
431  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
432 
433  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n",
434  inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
436  outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
437  outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
438  scale->flags);
439  return 0;
440 
441 fail:
443  "Error when evaluating the expression '%s'.\n"
444  "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
445  expr, scale->w_expr, scale->h_expr);
446  return ret;
447 }
448 
449 static int config_props_ref(AVFilterLink *outlink)
450 {
451  AVFilterLink *inlink = outlink->src->inputs[1];
452 
453  outlink->w = inlink->w;
454  outlink->h = inlink->h;
455  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
456  outlink->time_base = inlink->time_base;
457 
458  return 0;
459 }
460 
461 static int request_frame(AVFilterLink *outlink)
462 {
463  return ff_request_frame(outlink->src->inputs[0]);
464 }
465 
466 static int request_frame_ref(AVFilterLink *outlink)
467 {
468  return ff_request_frame(outlink->src->inputs[1]);
469 }
470 
471 static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
472 {
473  ScaleContext *scale = link->dst->priv;
474  const uint8_t *in[4];
475  uint8_t *out[4];
476  int in_stride[4],out_stride[4];
477  int i;
478 
479  for(i=0; i<4; i++){
480  int vsub= ((i+1)&2) ? scale->vsub : 0;
481  in_stride[i] = cur_pic->linesize[i] * mul;
482  out_stride[i] = out_buf->linesize[i] * mul;
483  in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
484  out[i] = out_buf->data[i] + field * out_buf->linesize[i];
485  }
486  if(scale->input_is_pal)
487  in[1] = cur_pic->data[1];
488  if(scale->output_is_pal)
489  out[1] = out_buf->data[1];
490 
491  return sws_scale(sws, in, in_stride, y/mul, h,
492  out,out_stride);
493 }
494 
495 static int filter_frame(AVFilterLink *link, AVFrame *in)
496 {
497  ScaleContext *scale = link->dst->priv;
498  AVFilterLink *outlink = link->dst->outputs[0];
499  AVFrame *out;
501  char buf[32];
502  int in_range;
503 
505  av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
506 
507  if( in->width != link->w
508  || in->height != link->h
509  || in->format != link->format
511  int ret;
512 
513  if (scale->eval_mode == EVAL_MODE_INIT) {
514  snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
515  av_opt_set(scale, "w", buf, 0);
516  snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
517  av_opt_set(scale, "h", buf, 0);
518  }
519 
520  link->dst->inputs[0]->format = in->format;
521  link->dst->inputs[0]->w = in->width;
522  link->dst->inputs[0]->h = in->height;
523 
526 
527 
528  if ((ret = config_props(outlink)) < 0)
529  return ret;
530  }
531 
532  if (!scale->sws)
533  return ff_filter_frame(outlink, in);
534 
535  scale->hsub = desc->log2_chroma_w;
536  scale->vsub = desc->log2_chroma_h;
537 
538  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
539  if (!out) {
540  av_frame_free(&in);
541  return AVERROR(ENOMEM);
542  }
543 
544  av_frame_copy_props(out, in);
545  out->width = outlink->w;
546  out->height = outlink->h;
547 
548  if(scale->output_is_pal)
549  avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
550 
551  in_range = av_frame_get_color_range(in);
552 
553  if ( scale->in_color_matrix
554  || scale->out_color_matrix
555  || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
556  || in_range != AVCOL_RANGE_UNSPECIFIED
557  || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
558  int in_full, out_full, brightness, contrast, saturation;
559  const int *inv_table, *table;
560 
561  sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
562  (int **)&table, &out_full,
563  &brightness, &contrast, &saturation);
564 
565  if (scale->in_color_matrix)
566  inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in));
567  if (scale->out_color_matrix)
569  else if (scale->in_color_matrix)
570  table = inv_table;
571 
572  if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
573  in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
574  else if (in_range != AVCOL_RANGE_UNSPECIFIED)
575  in_full = (in_range == AVCOL_RANGE_JPEG);
576  if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
577  out_full = (scale->out_range == AVCOL_RANGE_JPEG);
578 
579  sws_setColorspaceDetails(scale->sws, inv_table, in_full,
580  table, out_full,
581  brightness, contrast, saturation);
582  if (scale->isws[0])
583  sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
584  table, out_full,
585  brightness, contrast, saturation);
586  if (scale->isws[1])
587  sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
588  table, out_full,
589  brightness, contrast, saturation);
590 
592  }
593 
595  (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
596  (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
597  INT_MAX);
598 
599  if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
600  scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
601  scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
602  }else if (scale->nb_slices) {
603  int i, slice_h, slice_start, slice_end = 0;
604  const int nb_slices = FFMIN(scale->nb_slices, link->h);
605  for (i = 0; i < nb_slices; i++) {
606  slice_start = slice_end;
607  slice_end = (link->h * (i+1)) / nb_slices;
608  slice_h = slice_end - slice_start;
609  scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
610  }
611  }else{
612  scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
613  }
614 
615  av_frame_free(&in);
616  return ff_filter_frame(outlink, out);
617 }
618 
620 {
621  AVFilterLink *outlink = link->dst->outputs[1];
622 
623  return ff_filter_frame(outlink, in);
624 }
625 
626 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
627  char *res, int res_len, int flags)
628 {
629  ScaleContext *scale = ctx->priv;
630  int ret;
631 
632  if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
633  || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
634 
635  int old_w = scale->w;
636  int old_h = scale->h;
637  AVFilterLink *outlink = ctx->outputs[0];
638 
639  av_opt_set(scale, cmd, args, 0);
640  if ((ret = config_props(outlink)) < 0) {
641  scale->w = old_w;
642  scale->h = old_h;
643  }
644  } else
645  ret = AVERROR(ENOSYS);
646 
647  return ret;
648 }
649 
650 static const AVClass *child_class_next(const AVClass *prev)
651 {
652  return prev ? NULL : sws_get_class();
653 }
654 
655 #define OFFSET(x) offsetof(ScaleContext, x)
656 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
657 
658 static const AVOption scale_options[] = {
659  { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
660  { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
661  { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
662  { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
663  { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
664  { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
665  { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
666  { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
667  { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS },
668  { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
669  { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
670  { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
671  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
672  { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
673  { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
674  { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
675  { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
676  { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
677  { "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 },
678  { "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 },
679  { "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 },
680  { "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 },
681  { "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, "force_oar" },
682  { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
683  { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
684  { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
685  { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
686  { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
687  { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
688  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
689  { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
690  { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
691  { NULL }
692 };
693 
694 static const AVClass scale_class = {
695  .class_name = "scale",
696  .item_name = av_default_item_name,
697  .option = scale_options,
698  .version = LIBAVUTIL_VERSION_INT,
699  .category = AV_CLASS_CATEGORY_FILTER,
700  .child_class_next = child_class_next,
701 };
702 
704  {
705  .name = "default",
706  .type = AVMEDIA_TYPE_VIDEO,
707  .filter_frame = filter_frame,
708  },
709  { NULL }
710 };
711 
713  {
714  .name = "default",
715  .type = AVMEDIA_TYPE_VIDEO,
716  .config_props = config_props,
717  },
718  { NULL }
719 };
720 
722  .name = "scale",
723  .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
724  .init_dict = init_dict,
725  .uninit = uninit,
726  .query_formats = query_formats,
727  .priv_size = sizeof(ScaleContext),
728  .priv_class = &scale_class,
729  .inputs = avfilter_vf_scale_inputs,
730  .outputs = avfilter_vf_scale_outputs,
732 };
733 
734 static const AVClass scale2ref_class = {
735  .class_name = "scale2ref",
736  .item_name = av_default_item_name,
737  .option = scale_options,
738  .version = LIBAVUTIL_VERSION_INT,
739  .category = AV_CLASS_CATEGORY_FILTER,
740  .child_class_next = child_class_next,
741 };
742 
744  {
745  .name = "default",
746  .type = AVMEDIA_TYPE_VIDEO,
747  .filter_frame = filter_frame,
748  },
749  {
750  .name = "ref",
751  .type = AVMEDIA_TYPE_VIDEO,
752  .filter_frame = filter_frame_ref,
753  },
754  { NULL }
755 };
756 
758  {
759  .name = "default",
760  .type = AVMEDIA_TYPE_VIDEO,
761  .config_props = config_props,
762  .request_frame= request_frame,
763  },
764  {
765  .name = "ref",
766  .type = AVMEDIA_TYPE_VIDEO,
767  .config_props = config_props_ref,
768  .request_frame= request_frame_ref,
769  },
770  { NULL }
771 };
772 
773 AVFilter ff_vf_scale2ref = {
774  .name = "scale2ref",
775  .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
776  .init_dict = init_dict,
777  .uninit = uninit,
778  .query_formats = query_formats,
779  .priv_size = sizeof(ScaleContext),
780  .priv_class = &scale2ref_class,
781  .inputs = avfilter_vf_scale2ref_inputs,
782  .outputs = avfilter_vf_scale2ref_outputs,
784 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:431
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
Definition: vf_scale.c:129
static enum AVPixelFormat pix_fmt
#define FLAGS
Definition: vf_scale.c:656
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
int in_h_chr_pos
Definition: vf_scale.c:116
AVOption.
Definition: opt.h:245
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:143
AVFormatContext * ctx
Definition: movenc-test.c:48
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
Main libavfilter public API header.
enum AVColorRange av_frame_get_color_range(const AVFrame *frame)
const char * desc
Definition: nvenc.c:237
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
Definition: utils.c:981
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:435
static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
Definition: vf_scale.c:471
int num
numerator
Definition: rational.h:44
int in_v_chr_pos
Definition: vf_scale.c:117
int out_h_chr_pos
Definition: vf_scale.c:114
int eval_mode
expression evaluation mode
Definition: vf_scale.c:123
int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
Definition: utils.c:263
int force_original_aspect_ratio
Definition: vf_scale.c:119
static enum AVSampleFormat formats[]
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
const AVClass * sws_get_class(void)
Get the AVClass for swsContext.
Definition: options.c:95
int vsub
chroma subsampling
Definition: vf_scale.c:98
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
int output_is_pal
set to 1 if the output format is paletted
Definition: vf_scale.c:101
functionally identical to above
Definition: pixfmt.h:437
const char * name
Pad name.
Definition: internal.h:59
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:72
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:313
char * w_expr
width expression string
Definition: vf_scale.c:104
static int query_formats(AVFilterContext *ctx)
Definition: vf_scale.c:189
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1180
uint8_t
#define av_cold
Definition: attributes.h:82
av_warn_unused_result int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
Definition: utils.c:1142
char * h_expr
height expression string
Definition: vf_scale.c:105
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
AVOptions.
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:429
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:151
AVFilter ff_vf_scale2ref
Definition: vf_scale.c:127
static const int * parse_yuv_type(const char *s, enum AVColorSpace colorspace)
Definition: vf_scale.c:227
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
static const AVClass scale_class
Definition: vf_scale.c:694
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:314
external API header
#define av_log(a,...)
void av_frame_set_color_range(AVFrame *frame, enum AVColorRange val)
A filter pad used for either input or output.
Definition: internal.h:53
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:300
int av_expr_parse_and_eval(double *d, const char *s, const char *const *const_names, const double *const_values, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), void *opaque, int log_offset, void *log_ctx)
Parse and evaluate an expression.
Definition: eval.c:723
int width
width and height of the video frame
Definition: frame.h:232
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static const AVClass scale2ref_class
Definition: vf_scale.c:734
static const AVOption scale_options[]
Definition: vf_scale.c:658
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
int av_opt_eval_flags(void *obj, const AVOption *o, const char *val, int *flags_out)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
#define sws_isSupportedOutput(x)
static const struct endianess table[]
#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
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:202
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:534
simple assert() macros that are a bit more flexible than ISO C assert().
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:81
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_scale.c:626
int w
New dimensions.
Definition: vf_scale.c:93
static int config_props(AVFilterLink *outlink)
Definition: vf_scale.c:251
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
var_name
Definition: aeval.c:46
const AVOption * av_opt_find(void *obj, const char *name, const char *unit, int opt_flags, int search_flags)
Look for an option in an object.
Definition: opt.c:1561
common internal API header
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
char * out_color_matrix
Definition: vf_scale.c:109
enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc)
Definition: pixdesc.c:2212
#define AVCOL_SPC_YCGCO
Definition: pixfmt.h:443
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_scale.c:179
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
static const AVFilterPad avfilter_vf_scale_outputs[]
Definition: vf_scale.c:712
#define FFMIN(a, b)
Definition: common.h:96
double param[2]
sws flags
Definition: vf_scale.c:96
uint8_t interlaced
Definition: mxfenc.c:1823
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
static int request_frame(AVFilterLink *outlink)
Definition: vf_scale.c:461
ITU-R BT2020 non-constant luminance system.
Definition: pixfmt.h:439
static const AVClass * child_class_next(const AVClass *prev)
Definition: vf_scale.c:650
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
Definition: pixdesc.h:158
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
Definition: utils.c:2268
int interlaced
Definition: vf_scale.c:102
const int * sws_getCoefficients(int colorspace)
Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDet...
Definition: yuv2rgb.c:63
#define sws_isSupportedInput(x)
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
Definition: utils.c:846
char * flags_str
Definition: vf_scale.c:106
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:434
EvalMode
Definition: af_volume.h:39
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:452
FILE * out
Definition: movenc-test.c:54
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:244
static int config_props_ref(AVFilterLink *outlink)
Definition: vf_scale.c:449
static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
Definition: vf_scale.c:619
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:84
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
#define OFFSET(x)
Definition: vf_scale.c:655
AVFilter ff_vf_scale
Definition: vf_scale.c:721
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
struct SwsContext * sws
software scaler context
Definition: vf_scale.c:83
static int request_frame_ref(AVFilterLink *outlink)
Definition: vf_scale.c:466
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 AVFilterPad avfilter_vf_scale_inputs[]
Definition: vf_scale.c:703
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:259
static const AVFilterPad avfilter_vf_scale2ref_outputs[]
Definition: vf_scale.c:757
AVDictionary * opts
Definition: vf_scale.c:85
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
Definition: swscale.c:751
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
void * buf
Definition: avisynth_c.h:553
enum AVColorSpace av_frame_get_colorspace(const AVFrame *frame)
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:142
rational number numerator/denominator
Definition: rational.h:43
const char * name
Filter name.
Definition: avfilter.h:146
#define snprintf
Definition: snprintf.h:34
int input_is_pal
set to 1 if the input format is paletted
Definition: vf_scale.c:100
static const char *const var_names[]
Definition: vf_scale.c:44
unsigned int flags
Definition: vf_scale.c:95
misc parsing utilities
struct SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
Definition: utils.c:1059
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:317
int out_v_chr_pos
Definition: vf_scale.c:115
static int flags
Definition: cpu.c:47
struct SwsContext * isws[2]
software scaler context for interlaced material
Definition: vf_scale.c:84
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
static int filter_frame(AVFilterLink *link, AVFrame *in)
Definition: vf_scale.c:495
int in_range
Definition: vf_scale.c:111
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:451
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
double param[2]
Input parameters for scaling algorithms that need them.
int out_range
Definition: vf_scale.c:112
#define AV_OPT_SEARCH_FAKE_OBJ
The obj passed to av_opt_find() is fake – only a double pointer to AVClass instead of a required poin...
Definition: opt.h:565
char * size_str
Definition: vf_scale.c:94
char * key
Definition: dict.h:86
int den
denominator
Definition: rational.h:45
#define SWS_PARAM_DEFAULT
Definition: swscale.h:71
int slice_y
top of current output slice
Definition: vf_scale.c:99
Definition: vf_scale.c:64
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2051
char * value
Definition: dict.h:87
#define NAN
Definition: math.h:28
char * in_color_matrix
Definition: vf_scale.c:108
int nb_slices
Definition: vf_scale.c:121
AVDictionary * opts
Definition: movenc-test.c:50
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_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:369
#define FFSWAP(type, a, b)
Definition: common.h:99
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:2109
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:431
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:308
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:574
static const AVFilterPad avfilter_vf_scale2ref_inputs[]
Definition: vf_scale.c:743
simple arithmetic expression evaluator
const AVPixFmtDescriptor * av_pix_fmt_desc_next(const AVPixFmtDescriptor *prev)
Iterate over all pixel format descriptors known to libavutil.
Definition: pixdesc.c:2200