FFmpeg
vf_zscale.c
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1 /*
2  * Copyright (c) 2015 Paul B Mahol
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  * zscale video filter using z.lib library
24  */
25 
26 #include <float.h>
27 #include <stdio.h>
28 #include <string.h>
29 
30 #include <zimg.h>
31 
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35 #include "video.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/eval.h"
38 #include "libavutil/internal.h"
39 #include "libavutil/intreadwrite.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/parseutils.h"
43 #include "libavutil/pixdesc.h"
44 #include "libavutil/imgutils.h"
45 #include "libavutil/avassert.h"
46 
47 static const char *const var_names[] = {
48  "in_w", "iw",
49  "in_h", "ih",
50  "out_w", "ow",
51  "out_h", "oh",
52  "a",
53  "sar",
54  "dar",
55  "hsub",
56  "vsub",
57  "ohsub",
58  "ovsub",
59  NULL
60 };
61 
62 enum var_name {
75 };
76 
77 typedef struct ZScaleContext {
78  const AVClass *class;
79 
80  /**
81  * New dimensions. Special values are:
82  * 0 = original width/height
83  * -1 = keep original aspect
84  * -N = try to keep aspect but make sure it is divisible by N
85  */
86  int w, h;
87  int dither;
88  int filter;
90  int trc;
91  int primaries;
92  int range;
93  int chromal;
95  int trc_in;
97  int range_in;
99  char *size_str;
102 
103  char *w_expr; ///< width expression string
104  char *h_expr; ///< height expression string
105 
110 
112 
113  void *tmp;
114  size_t tmp_size;
115 
116  zimg_image_format src_format, dst_format;
117  zimg_image_format alpha_src_format, alpha_dst_format;
118  zimg_graph_builder_params alpha_params, params;
119  zimg_filter_graph *alpha_graph, *graph;
120 
121  enum AVColorSpace in_colorspace, out_colorspace;
123  enum AVColorPrimaries in_primaries, out_primaries;
124  enum AVColorRange in_range, out_range;
125  enum AVChromaLocation in_chromal, out_chromal;
126 } ZScaleContext;
127 
129 {
130  ZScaleContext *s = ctx->priv;
131  int ret;
132 
133  if (s->size_str && (s->w_expr || s->h_expr)) {
134  av_log(ctx, AV_LOG_ERROR,
135  "Size and width/height expressions cannot be set at the same time.\n");
136  return AVERROR(EINVAL);
137  }
138 
139  if (s->w_expr && !s->h_expr)
140  FFSWAP(char *, s->w_expr, s->size_str);
141 
142  if (s->size_str) {
143  char buf[32];
144  if ((ret = av_parse_video_size(&s->w, &s->h, s->size_str)) < 0) {
145  av_log(ctx, AV_LOG_ERROR,
146  "Invalid size '%s'\n", s->size_str);
147  return ret;
148  }
149  snprintf(buf, sizeof(buf)-1, "%d", s->w);
150  av_opt_set(s, "w", buf, 0);
151  snprintf(buf, sizeof(buf)-1, "%d", s->h);
152  av_opt_set(s, "h", buf, 0);
153  }
154  if (!s->w_expr)
155  av_opt_set(s, "w", "iw", 0);
156  if (!s->h_expr)
157  av_opt_set(s, "h", "ih", 0);
158 
159  return 0;
160 }
161 
163 {
164  static const enum AVPixelFormat pixel_fmts[] = {
185  };
186  int ret;
187 
188  ret = ff_formats_ref(ff_make_format_list(pixel_fmts), &ctx->inputs[0]->out_formats);
189  if (ret < 0)
190  return ret;
191  return ff_formats_ref(ff_make_format_list(pixel_fmts), &ctx->outputs[0]->in_formats);
192 }
193 
194 static int config_props(AVFilterLink *outlink)
195 {
196  AVFilterContext *ctx = outlink->src;
197  AVFilterLink *inlink = outlink->src->inputs[0];
198  ZScaleContext *s = ctx->priv;
200  const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
201  int64_t w, h;
202  double var_values[VARS_NB], res;
203  char *expr;
204  int ret;
205  int factor_w, factor_h;
206 
207  var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
208  var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
209  var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
210  var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
211  var_values[VAR_A] = (double) inlink->w / inlink->h;
212  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
213  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
214  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
215  var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
216  var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
217  var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
218  var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
219 
220  /* evaluate width and height */
221  av_expr_parse_and_eval(&res, (expr = s->w_expr),
222  var_names, var_values,
223  NULL, NULL, NULL, NULL, NULL, 0, ctx);
224  s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
225  if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
226  var_names, var_values,
227  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
228  goto fail;
229  s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
230  /* evaluate again the width, as it may depend on the output height */
231  if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
232  var_names, var_values,
233  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
234  goto fail;
235  s->w = res;
236 
237  w = s->w;
238  h = s->h;
239 
240  /* Check if it is requested that the result has to be divisible by a some
241  * factor (w or h = -n with n being the factor). */
242  factor_w = 1;
243  factor_h = 1;
244  if (w < -1) {
245  factor_w = -w;
246  }
247  if (h < -1) {
248  factor_h = -h;
249  }
250 
251  if (w < 0 && h < 0)
252  s->w = s->h = 0;
253 
254  if (!(w = s->w))
255  w = inlink->w;
256  if (!(h = s->h))
257  h = inlink->h;
258 
259  /* Make sure that the result is divisible by the factor we determined
260  * earlier. If no factor was set, it is nothing will happen as the default
261  * factor is 1 */
262  if (w < 0)
263  w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w;
264  if (h < 0)
265  h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h;
266 
267  /* Note that force_original_aspect_ratio may overwrite the previous set
268  * dimensions so that it is not divisible by the set factors anymore. */
270  int tmp_w = av_rescale(h, inlink->w, inlink->h);
271  int tmp_h = av_rescale(w, inlink->h, inlink->w);
272 
273  if (s->force_original_aspect_ratio == 1) {
274  w = FFMIN(tmp_w, w);
275  h = FFMIN(tmp_h, h);
276  } else {
277  w = FFMAX(tmp_w, w);
278  h = FFMAX(tmp_h, h);
279  }
280  }
281 
282  if (w > INT_MAX || h > INT_MAX ||
283  (h * inlink->w) > INT_MAX ||
284  (w * inlink->h) > INT_MAX)
285  av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
286 
287  outlink->w = w;
288  outlink->h = h;
289 
290  if (inlink->w == outlink->w &&
291  inlink->h == outlink->h &&
292  inlink->format == outlink->format)
293  ;
294  else {
295  }
296 
297  if (inlink->sample_aspect_ratio.num){
298  outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
299  } else
300  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
301 
302  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d\n",
303  inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
305  outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
306  outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den);
307  return 0;
308 
309 fail:
310  av_log(ctx, AV_LOG_ERROR,
311  "Error when evaluating the expression '%s'.\n"
312  "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
313  expr, s->w_expr, s->h_expr);
314  return ret;
315 }
316 
318 {
319  char err_msg[1024];
320  int err_code = zimg_get_last_error(err_msg, sizeof(err_msg));
321 
322  av_log(ctx, AV_LOG_ERROR, "code %d: %s\n", err_code, err_msg);
323 
324  return AVERROR_EXTERNAL;
325 }
326 
327 static int convert_chroma_location(enum AVChromaLocation chroma_location)
328 {
329  switch (chroma_location) {
331  case AVCHROMA_LOC_LEFT:
332  return ZIMG_CHROMA_LEFT;
333  case AVCHROMA_LOC_CENTER:
334  return ZIMG_CHROMA_CENTER;
336  return ZIMG_CHROMA_TOP_LEFT;
337  case AVCHROMA_LOC_TOP:
338  return ZIMG_CHROMA_TOP;
340  return ZIMG_CHROMA_BOTTOM_LEFT;
341  case AVCHROMA_LOC_BOTTOM:
342  return ZIMG_CHROMA_BOTTOM;
343  }
344  return ZIMG_CHROMA_LEFT;
345 }
346 
348 {
349  switch (colorspace) {
350  case AVCOL_SPC_RGB:
351  return ZIMG_MATRIX_RGB;
352  case AVCOL_SPC_BT709:
353  return ZIMG_MATRIX_709;
355  return ZIMG_MATRIX_UNSPECIFIED;
356  case AVCOL_SPC_FCC:
357  return ZIMG_MATRIX_FCC;
358  case AVCOL_SPC_BT470BG:
359  return ZIMG_MATRIX_470BG;
360  case AVCOL_SPC_SMPTE170M:
361  return ZIMG_MATRIX_170M;
362  case AVCOL_SPC_SMPTE240M:
363  return ZIMG_MATRIX_240M;
364  case AVCOL_SPC_YCGCO:
365  return ZIMG_MATRIX_YCGCO;
367  return ZIMG_MATRIX_2020_NCL;
368  case AVCOL_SPC_BT2020_CL:
369  return ZIMG_MATRIX_2020_CL;
371  return ZIMG_MATRIX_CHROMATICITY_DERIVED_NCL;
373  return ZIMG_MATRIX_CHROMATICITY_DERIVED_CL;
374  case AVCOL_SPC_ICTCP:
375  return ZIMG_MATRIX_ICTCP;
376  }
377  return ZIMG_MATRIX_UNSPECIFIED;
378 }
379 
380 static int convert_trc(enum AVColorTransferCharacteristic color_trc)
381 {
382  switch (color_trc) {
384  return ZIMG_TRANSFER_UNSPECIFIED;
385  case AVCOL_TRC_BT709:
386  return ZIMG_TRANSFER_709;
387  case AVCOL_TRC_GAMMA22:
388  return ZIMG_TRANSFER_470_M;
389  case AVCOL_TRC_GAMMA28:
390  return ZIMG_TRANSFER_470_BG;
391  case AVCOL_TRC_SMPTE170M:
392  return ZIMG_TRANSFER_601;
393  case AVCOL_TRC_SMPTE240M:
394  return ZIMG_TRANSFER_240M;
395  case AVCOL_TRC_LINEAR:
396  return ZIMG_TRANSFER_LINEAR;
397  case AVCOL_TRC_LOG:
398  return ZIMG_TRANSFER_LOG_100;
399  case AVCOL_TRC_LOG_SQRT:
400  return ZIMG_TRANSFER_LOG_316;
402  return ZIMG_TRANSFER_IEC_61966_2_4;
403  case AVCOL_TRC_BT2020_10:
404  return ZIMG_TRANSFER_2020_10;
405  case AVCOL_TRC_BT2020_12:
406  return ZIMG_TRANSFER_2020_12;
407  case AVCOL_TRC_SMPTE2084:
408  return ZIMG_TRANSFER_ST2084;
410  return ZIMG_TRANSFER_ARIB_B67;
412  return ZIMG_TRANSFER_IEC_61966_2_1;
413  }
414  return ZIMG_TRANSFER_UNSPECIFIED;
415 }
416 
418 {
419  switch (color_primaries) {
421  return ZIMG_PRIMARIES_UNSPECIFIED;
422  case AVCOL_PRI_BT709:
423  return ZIMG_PRIMARIES_709;
424  case AVCOL_PRI_BT470M:
425  return ZIMG_PRIMARIES_470_M;
426  case AVCOL_PRI_BT470BG:
427  return ZIMG_PRIMARIES_470_BG;
428  case AVCOL_PRI_SMPTE170M:
429  return ZIMG_PRIMARIES_170M;
430  case AVCOL_PRI_SMPTE240M:
431  return ZIMG_PRIMARIES_240M;
432  case AVCOL_PRI_FILM:
433  return ZIMG_PRIMARIES_FILM;
434  case AVCOL_PRI_BT2020:
435  return ZIMG_PRIMARIES_2020;
436  case AVCOL_PRI_SMPTE428:
437  return ZIMG_PRIMARIES_ST428;
438  case AVCOL_PRI_SMPTE431:
439  return ZIMG_PRIMARIES_ST431_2;
440  case AVCOL_PRI_SMPTE432:
441  return ZIMG_PRIMARIES_ST432_1;
442  case AVCOL_PRI_JEDEC_P22:
443  return ZIMG_PRIMARIES_EBU3213_E;
444  }
445  return ZIMG_PRIMARIES_UNSPECIFIED;
446 }
447 
449 {
450  switch (color_range) {
452  case AVCOL_RANGE_MPEG:
453  return ZIMG_RANGE_LIMITED;
454  case AVCOL_RANGE_JPEG:
455  return ZIMG_RANGE_FULL;
456  }
457  return ZIMG_RANGE_LIMITED;
458 }
459 
460 static void format_init(zimg_image_format *format, AVFrame *frame, const AVPixFmtDescriptor *desc,
461  int colorspace, int primaries, int transfer, int range, int location)
462 {
463  format->width = frame->width;
464  format->height = frame->height;
465  format->subsample_w = desc->log2_chroma_w;
466  format->subsample_h = desc->log2_chroma_h;
467  format->depth = desc->comp[0].depth;
468  format->pixel_type = (desc->flags & AV_PIX_FMT_FLAG_FLOAT) ? ZIMG_PIXEL_FLOAT : desc->comp[0].depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
469  format->color_family = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_COLOR_RGB : ZIMG_COLOR_YUV;
470  format->matrix_coefficients = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_MATRIX_RGB : colorspace == -1 ? convert_matrix(frame->colorspace) : colorspace;
471  format->color_primaries = primaries == -1 ? convert_primaries(frame->color_primaries) : primaries;
472  format->transfer_characteristics = transfer == - 1 ? convert_trc(frame->color_trc) : transfer;
473  format->pixel_range = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? ZIMG_RANGE_FULL : range == -1 ? convert_range(frame->color_range) : range;
474  format->chroma_location = location == -1 ? convert_chroma_location(frame->chroma_location) : location;
475 }
476 
477 static int graph_build(zimg_filter_graph **graph, zimg_graph_builder_params *params,
478  zimg_image_format *src_format, zimg_image_format *dst_format,
479  void **tmp, size_t *tmp_size)
480 {
481  int ret;
482  size_t size;
483 
484  zimg_filter_graph_free(*graph);
485  *graph = zimg_filter_graph_build(src_format, dst_format, params);
486  if (!*graph)
487  return print_zimg_error(NULL);
488 
489  ret = zimg_filter_graph_get_tmp_size(*graph, &size);
490  if (ret)
491  return print_zimg_error(NULL);
492 
493  if (size > *tmp_size) {
494  av_freep(tmp);
495  *tmp = av_malloc(size);
496  if (!*tmp)
497  return AVERROR(ENOMEM);
498 
499  *tmp_size = size;
500  }
501 
502  return 0;
503 }
504 
506 {
507  ZScaleContext *s = link->dst->priv;
508  AVFilterLink *outlink = link->dst->outputs[0];
510  const AVPixFmtDescriptor *odesc = av_pix_fmt_desc_get(outlink->format);
511  zimg_image_buffer_const src_buf = { ZIMG_API_VERSION };
512  zimg_image_buffer dst_buf = { ZIMG_API_VERSION };
513  char buf[32];
514  int ret = 0, plane;
515  AVFrame *out;
516 
517  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
518  if (!out) {
519  av_frame_free(&in);
520  return AVERROR(ENOMEM);
521  }
522 
523  av_frame_copy_props(out, in);
524  out->width = outlink->w;
525  out->height = outlink->h;
526 
527  if( in->width != link->w
528  || in->height != link->h
529  || in->format != link->format
530  || s->in_colorspace != in->colorspace
531  || s->in_trc != in->color_trc
532  || s->in_primaries != in->color_primaries
533  || s->in_range != in->color_range
534  || s->out_colorspace != out->colorspace
535  || s->out_trc != out->color_trc
536  || s->out_primaries != out->color_primaries
537  || s->out_range != out->color_range
538  || s->in_chromal != in->chroma_location
539  || s->out_chromal != out->chroma_location) {
540  snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
541  av_opt_set(s, "w", buf, 0);
542  snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
543  av_opt_set(s, "h", buf, 0);
544 
545  link->dst->inputs[0]->format = in->format;
546  link->dst->inputs[0]->w = in->width;
547  link->dst->inputs[0]->h = in->height;
548 
549  if ((ret = config_props(outlink)) < 0) {
550  av_frame_free(&in);
551  av_frame_free(&out);
552  return ret;
553  }
554 
555  zimg_image_format_default(&s->src_format, ZIMG_API_VERSION);
556  zimg_image_format_default(&s->dst_format, ZIMG_API_VERSION);
557  zimg_graph_builder_params_default(&s->params, ZIMG_API_VERSION);
558 
559  s->params.dither_type = s->dither;
560  s->params.cpu_type = ZIMG_CPU_AUTO;
561  s->params.resample_filter = s->filter;
562  s->params.resample_filter_uv = s->filter;
563  s->params.nominal_peak_luminance = s->nominal_peak_luminance;
564  s->params.allow_approximate_gamma = s->approximate_gamma;
565 
566  format_init(&s->src_format, in, desc, s->colorspace_in,
567  s->primaries_in, s->trc_in, s->range_in, s->chromal_in);
568  format_init(&s->dst_format, out, odesc, s->colorspace,
569  s->primaries, s->trc, s->range, s->chromal);
570 
571  if (s->colorspace != -1)
572  out->colorspace = (int)s->dst_format.matrix_coefficients;
573 
574  if (s->primaries != -1)
575  out->color_primaries = (int)s->dst_format.color_primaries;
576 
577  if (s->range != -1)
578  out->color_range = (int)s->dst_format.pixel_range + 1;
579 
580  if (s->trc != -1)
581  out->color_trc = (int)s->dst_format.transfer_characteristics;
582 
583  if (s->chromal != -1)
584  out->chroma_location = (int)s->dst_format.chroma_location - 1;
585 
586  ret = graph_build(&s->graph, &s->params, &s->src_format, &s->dst_format,
587  &s->tmp, &s->tmp_size);
588  if (ret < 0)
589  goto fail;
590 
591  s->in_colorspace = in->colorspace;
592  s->in_trc = in->color_trc;
593  s->in_primaries = in->color_primaries;
594  s->in_range = in->color_range;
595  s->out_colorspace = out->colorspace;
596  s->out_trc = out->color_trc;
597  s->out_primaries = out->color_primaries;
598  s->out_range = out->color_range;
599 
600  if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
601  zimg_image_format_default(&s->alpha_src_format, ZIMG_API_VERSION);
602  zimg_image_format_default(&s->alpha_dst_format, ZIMG_API_VERSION);
603  zimg_graph_builder_params_default(&s->alpha_params, ZIMG_API_VERSION);
604 
605  s->alpha_params.dither_type = s->dither;
606  s->alpha_params.cpu_type = ZIMG_CPU_AUTO;
607  s->alpha_params.resample_filter = s->filter;
608 
609  s->alpha_src_format.width = in->width;
610  s->alpha_src_format.height = in->height;
611  s->alpha_src_format.depth = desc->comp[0].depth;
612  s->alpha_src_format.pixel_type = (desc->flags & AV_PIX_FMT_FLAG_FLOAT) ? ZIMG_PIXEL_FLOAT : desc->comp[0].depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
613  s->alpha_src_format.color_family = ZIMG_COLOR_GREY;
614 
615  s->alpha_dst_format.width = out->width;
616  s->alpha_dst_format.height = out->height;
617  s->alpha_dst_format.depth = odesc->comp[0].depth;
618  s->alpha_dst_format.pixel_type = (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) ? ZIMG_PIXEL_FLOAT : odesc->comp[0].depth > 8 ? ZIMG_PIXEL_WORD : ZIMG_PIXEL_BYTE;
619  s->alpha_dst_format.color_family = ZIMG_COLOR_GREY;
620 
621  zimg_filter_graph_free(s->alpha_graph);
622  s->alpha_graph = zimg_filter_graph_build(&s->alpha_src_format, &s->alpha_dst_format, &s->alpha_params);
623  if (!s->alpha_graph) {
624  ret = print_zimg_error(link->dst);
625  goto fail;
626  }
627  }
628  }
629 
630  if (s->colorspace != -1)
631  out->colorspace = (int)s->dst_format.matrix_coefficients;
632 
633  if (s->primaries != -1)
634  out->color_primaries = (int)s->dst_format.color_primaries;
635 
636  if (s->range != -1)
637  out->color_range = (int)s->dst_format.pixel_range;
638 
639  if (s->trc != -1)
640  out->color_trc = (int)s->dst_format.transfer_characteristics;
641 
643  (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
644  (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
645  INT_MAX);
646 
647  for (plane = 0; plane < 3; plane++) {
648  int p = desc->comp[plane].plane;
649  src_buf.plane[plane].data = in->data[p];
650  src_buf.plane[plane].stride = in->linesize[p];
651  src_buf.plane[plane].mask = -1;
652 
653  p = odesc->comp[plane].plane;
654  dst_buf.plane[plane].data = out->data[p];
655  dst_buf.plane[plane].stride = out->linesize[p];
656  dst_buf.plane[plane].mask = -1;
657  }
658 
659  ret = zimg_filter_graph_process(s->graph, &src_buf, &dst_buf, s->tmp, 0, 0, 0, 0);
660  if (ret) {
661  ret = print_zimg_error(link->dst);
662  goto fail;
663  }
664 
665  if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
666  src_buf.plane[0].data = in->data[3];
667  src_buf.plane[0].stride = in->linesize[3];
668  src_buf.plane[0].mask = -1;
669 
670  dst_buf.plane[0].data = out->data[3];
671  dst_buf.plane[0].stride = out->linesize[3];
672  dst_buf.plane[0].mask = -1;
673 
674  ret = zimg_filter_graph_process(s->alpha_graph, &src_buf, &dst_buf, s->tmp, 0, 0, 0, 0);
675  if (ret) {
676  ret = print_zimg_error(link->dst);
677  goto fail;
678  }
679  } else if (odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
680  int x, y;
681 
682  if (odesc->flags & AV_PIX_FMT_FLAG_FLOAT) {
683  for (y = 0; y < out->height; y++) {
684  for (x = 0; x < out->width; x++) {
685  AV_WN32(out->data[3] + x * odesc->comp[3].step + y * out->linesize[3],
686  av_float2int(1.0f));
687  }
688  }
689  } else {
690  for (y = 0; y < outlink->h; y++)
691  memset(out->data[3] + y * out->linesize[3], 0xff, outlink->w);
692  }
693  }
694 
695 fail:
696  av_frame_free(&in);
697  if (ret) {
698  av_frame_free(&out);
699  return ret;
700  }
701 
702  return ff_filter_frame(outlink, out);
703 }
704 
706 {
707  ZScaleContext *s = ctx->priv;
708 
709  zimg_filter_graph_free(s->graph);
710  zimg_filter_graph_free(s->alpha_graph);
711  av_freep(&s->tmp);
712  s->tmp_size = 0;
713 }
714 
715 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
716  char *res, int res_len, int flags)
717 {
718  ZScaleContext *s = ctx->priv;
719  int ret;
720 
721  if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
722  || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
723 
724  int old_w = s->w;
725  int old_h = s->h;
726  AVFilterLink *outlink = ctx->outputs[0];
727 
728  av_opt_set(s, cmd, args, 0);
729  if ((ret = config_props(outlink)) < 0) {
730  s->w = old_w;
731  s->h = old_h;
732  }
733  } else
734  ret = AVERROR(ENOSYS);
735 
736  return ret;
737 }
738 
739 #define OFFSET(x) offsetof(ZScaleContext, x)
740 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
741 
742 static const AVOption zscale_options[] = {
743  { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
744  { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
745  { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
746  { "height", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
747  { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
748  { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
749  { "dither", "set dither type", OFFSET(dither), AV_OPT_TYPE_INT, {.i64 = 0}, 0, ZIMG_DITHER_ERROR_DIFFUSION, FLAGS, "dither" },
750  { "d", "set dither type", OFFSET(dither), AV_OPT_TYPE_INT, {.i64 = 0}, 0, ZIMG_DITHER_ERROR_DIFFUSION, FLAGS, "dither" },
751  { "none", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_NONE}, 0, 0, FLAGS, "dither" },
752  { "ordered", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_ORDERED}, 0, 0, FLAGS, "dither" },
753  { "random", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_RANDOM}, 0, 0, FLAGS, "dither" },
754  { "error_diffusion", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_DITHER_ERROR_DIFFUSION}, 0, 0, FLAGS, "dither" },
755  { "filter", "set filter type", OFFSET(filter), AV_OPT_TYPE_INT, {.i64 = ZIMG_RESIZE_BILINEAR}, 0, ZIMG_RESIZE_LANCZOS, FLAGS, "filter" },
756  { "f", "set filter type", OFFSET(filter), AV_OPT_TYPE_INT, {.i64 = ZIMG_RESIZE_BILINEAR}, 0, ZIMG_RESIZE_LANCZOS, FLAGS, "filter" },
757  { "point", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_POINT}, 0, 0, FLAGS, "filter" },
758  { "bilinear", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_BILINEAR}, 0, 0, FLAGS, "filter" },
759  { "bicubic", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_BICUBIC}, 0, 0, FLAGS, "filter" },
760  { "spline16", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_SPLINE16}, 0, 0, FLAGS, "filter" },
761  { "spline36", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_SPLINE36}, 0, 0, FLAGS, "filter" },
762  { "lanczos", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RESIZE_LANCZOS}, 0, 0, FLAGS, "filter" },
763  { "out_range", "set color range", OFFSET(range), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_RANGE_FULL, FLAGS, "range" },
764  { "range", "set color range", OFFSET(range), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_RANGE_FULL, FLAGS, "range" },
765  { "r", "set color range", OFFSET(range), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_RANGE_FULL, FLAGS, "range" },
766  { "input", 0, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, FLAGS, "range" },
767  { "limited", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RANGE_LIMITED}, 0, 0, FLAGS, "range" },
768  { "full", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RANGE_FULL}, 0, 0, FLAGS, "range" },
769  { "unknown", 0, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, FLAGS, "range" },
770  { "tv", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RANGE_LIMITED}, 0, 0, FLAGS, "range" },
771  { "pc", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_RANGE_FULL}, 0, 0, FLAGS, "range" },
772  { "primaries", "set color primaries", OFFSET(primaries), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
773  { "p", "set color primaries", OFFSET(primaries), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
774  { "input", 0, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, FLAGS, "primaries" },
775  { "709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_709}, 0, 0, FLAGS, "primaries" },
776  { "unspecified", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_UNSPECIFIED}, 0, 0, FLAGS, "primaries" },
777  { "170m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_170M}, 0, 0, FLAGS, "primaries" },
778  { "240m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_240M}, 0, 0, FLAGS, "primaries" },
779  { "2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_2020}, 0, 0, FLAGS, "primaries" },
780  { "unknown", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_UNSPECIFIED}, 0, 0, FLAGS, "primaries" },
781  { "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_709}, 0, 0, FLAGS, "primaries" },
782  { "bt470m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_470_M}, 0, 0, FLAGS, "primaries" },
783  { "bt470bg", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_470_BG}, 0, 0, FLAGS, "primaries" },
784  { "smpte170m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_170M}, 0, 0, FLAGS, "primaries" },
785  { "smpte240m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_240M}, 0, 0, FLAGS, "primaries" },
786  { "film", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_FILM}, 0, 0, FLAGS, "primaries" },
787  { "bt2020", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_2020}, 0, 0, FLAGS, "primaries" },
788  { "smpte428", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_ST428}, 0, 0, FLAGS, "primaries" },
789  { "smpte431", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_ST431_2}, 0, 0, FLAGS, "primaries" },
790  { "smpte432", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_ST432_1}, 0, 0, FLAGS, "primaries" },
791  { "jedec-p22", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_EBU3213_E}, 0, 0, FLAGS, "primaries" },
792  { "ebu3213", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_PRIMARIES_EBU3213_E}, 0, 0, FLAGS, "primaries" },
793  { "transfer", "set transfer characteristic", OFFSET(trc), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "transfer" },
794  { "t", "set transfer characteristic", OFFSET(trc), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "transfer" },
795  { "input", 0, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, FLAGS, "transfer" },
796  { "709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_709}, 0, 0, FLAGS, "transfer" },
797  { "unspecified", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_UNSPECIFIED}, 0, 0, FLAGS, "transfer" },
798  { "601", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_601}, 0, 0, FLAGS, "transfer" },
799  { "linear", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_LINEAR}, 0, 0, FLAGS, "transfer" },
800  { "2020_10", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_2020_10}, 0, 0, FLAGS, "transfer" },
801  { "2020_12", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_2020_12}, 0, 0, FLAGS, "transfer" },
802  { "unknown", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_UNSPECIFIED}, 0, 0, FLAGS, "transfer" },
803  { "bt470m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_470_M}, 0, 0, FLAGS, "transfer" },
804  { "bt470bg", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_470_BG}, 0, 0, FLAGS, "transfer" },
805  { "smpte170m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_601}, 0, 0, FLAGS, "transfer" },
806  { "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_709}, 0, 0, FLAGS, "transfer" },
807  { "linear", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_LINEAR}, 0, 0, FLAGS, "transfer" },
808  { "log100", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_LOG_100}, 0, 0, FLAGS, "transfer" },
809  { "log316", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_LOG_316}, 0, 0, FLAGS, "transfer" },
810  { "bt2020-10", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_2020_10}, 0, 0, FLAGS, "transfer" },
811  { "bt2020-12", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_2020_12}, 0, 0, FLAGS, "transfer" },
812  { "smpte2084", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_ST2084}, 0, 0, FLAGS, "transfer" },
813  { "iec61966-2-4", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_IEC_61966_2_4},0, 0, FLAGS, "transfer" },
814  { "iec61966-2-1", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_IEC_61966_2_1},0, 0, FLAGS, "transfer" },
815  { "arib-std-b67", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_TRANSFER_ARIB_B67}, 0, 0, FLAGS, "transfer" },
816  { "matrix", "set colorspace matrix", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
817  { "m", "set colorspace matrix", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
818  { "input", 0, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, FLAGS, "matrix" },
819  { "709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_709}, 0, 0, FLAGS, "matrix" },
820  { "unspecified", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_UNSPECIFIED}, 0, 0, FLAGS, "matrix" },
821  { "470bg", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_470BG}, 0, 0, FLAGS, "matrix" },
822  { "170m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_170M}, 0, 0, FLAGS, "matrix" },
823  { "2020_ncl", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_2020_NCL}, 0, 0, FLAGS, "matrix" },
824  { "2020_cl", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_2020_CL}, 0, 0, FLAGS, "matrix" },
825  { "unknown", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_UNSPECIFIED}, 0, 0, FLAGS, "matrix" },
826  { "gbr", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_RGB}, 0, 0, FLAGS, "matrix" },
827  { "bt709", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_709}, 0, 0, FLAGS, "matrix" },
828  { "fcc", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_FCC}, 0, 0, FLAGS, "matrix" },
829  { "bt470bg", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_470BG}, 0, 0, FLAGS, "matrix" },
830  { "smpte170m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_170M}, 0, 0, FLAGS, "matrix" },
831  { "smpte2400m", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_240M}, 0, 0, FLAGS, "matrix" },
832  { "ycgco", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_YCGCO}, 0, 0, FLAGS, "matrix" },
833  { "bt2020nc", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_2020_NCL}, 0, 0, FLAGS, "matrix" },
834  { "bt2020c", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_2020_CL}, 0, 0, FLAGS, "matrix" },
835  { "chroma-derived-nc",0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_CHROMATICITY_DERIVED_NCL}, 0, 0, FLAGS, "matrix" },
836  { "chroma-derived-c", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_CHROMATICITY_DERIVED_CL}, 0, 0, FLAGS, "matrix" },
837  { "ictcp", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_MATRIX_ICTCP}, 0, 0, FLAGS, "matrix" },
838  { "in_range", "set input color range", OFFSET(range_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_RANGE_FULL, FLAGS, "range" },
839  { "rangein", "set input color range", OFFSET(range_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_RANGE_FULL, FLAGS, "range" },
840  { "rin", "set input color range", OFFSET(range_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_RANGE_FULL, FLAGS, "range" },
841  { "primariesin", "set input color primaries", OFFSET(primaries_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
842  { "pin", "set input color primaries", OFFSET(primaries_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "primaries" },
843  { "transferin", "set input transfer characteristic", OFFSET(trc_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "transfer" },
844  { "tin", "set input transfer characteristic", OFFSET(trc_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "transfer" },
845  { "matrixin", "set input colorspace matrix", OFFSET(colorspace_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
846  { "min", "set input colorspace matrix", OFFSET(colorspace_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, FLAGS, "matrix" },
847  { "chromal", "set output chroma location", OFFSET(chromal), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_CHROMA_BOTTOM, FLAGS, "chroma" },
848  { "c", "set output chroma location", OFFSET(chromal), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_CHROMA_BOTTOM, FLAGS, "chroma" },
849  { "input", 0, 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, FLAGS, "chroma" },
850  { "left", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_CHROMA_LEFT}, 0, 0, FLAGS, "chroma" },
851  { "center", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_CHROMA_CENTER}, 0, 0, FLAGS, "chroma" },
852  { "topleft", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_CHROMA_TOP_LEFT}, 0, 0, FLAGS, "chroma" },
853  { "top", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_CHROMA_TOP}, 0, 0, FLAGS, "chroma" },
854  { "bottomleft",0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_CHROMA_BOTTOM_LEFT}, 0, 0, FLAGS, "chroma" },
855  { "bottom", 0, 0, AV_OPT_TYPE_CONST, {.i64 = ZIMG_CHROMA_BOTTOM}, 0, 0, FLAGS, "chroma" },
856  { "chromalin", "set input chroma location", OFFSET(chromal_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_CHROMA_BOTTOM, FLAGS, "chroma" },
857  { "cin", "set input chroma location", OFFSET(chromal_in), AV_OPT_TYPE_INT, {.i64 = -1}, -1, ZIMG_CHROMA_BOTTOM, FLAGS, "chroma" },
858  { "npl", "set nominal peak luminance", OFFSET(nominal_peak_luminance), AV_OPT_TYPE_DOUBLE, {.dbl = NAN}, 0, DBL_MAX, FLAGS },
859  { "agamma", "allow approximate gamma", OFFSET(approximate_gamma), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
860  { NULL }
861 };
862 
863 AVFILTER_DEFINE_CLASS(zscale);
864 
866  {
867  .name = "default",
868  .type = AVMEDIA_TYPE_VIDEO,
869  .filter_frame = filter_frame,
870  },
871  { NULL }
872 };
873 
875  {
876  .name = "default",
877  .type = AVMEDIA_TYPE_VIDEO,
878  .config_props = config_props,
879  },
880  { NULL }
881 };
882 
884  .name = "zscale",
885  .description = NULL_IF_CONFIG_SMALL("Apply resizing, colorspace and bit depth conversion."),
886  .init_dict = init_dict,
887  .query_formats = query_formats,
888  .priv_size = sizeof(ZScaleContext),
889  .priv_class = &zscale_class,
890  .uninit = uninit,
891  .inputs = avfilter_vf_zscale_inputs,
892  .outputs = avfilter_vf_zscale_outputs,
894 };
ITU-R BT2020 for 12-bit system.
Definition: pixfmt.h:484
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:499
int plane
Definition: avisynth_c.h:384
static const AVFilterPad avfilter_vf_zscale_outputs[]
Definition: vf_zscale.c:874
int plane
Which of the 4 planes contains the component.
Definition: pixdesc.h:35
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:430
IEC 61966-2-4.
Definition: pixfmt.h:480
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:422
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
MPEG-2/4 4:2:0, H.264 default for 4:2:0.
Definition: pixfmt.h:544
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
int out_v_chr_pos
Definition: vf_zscale.c:107
AVOption.
Definition: opt.h:246
"Linear transfer characteristics"
Definition: pixfmt.h:477
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:424
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:148
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:397
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:425
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:68
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:503
SMPTE ST 432-1 (2010) / P3 D65 / Display P3.
Definition: pixfmt.h:458
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
int num
Numerator.
Definition: rational.h:59
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
Definition: pixfmt.h:504
zimg_image_format dst_format
Definition: vf_zscale.c:116
SMPTE ST 431-2 (2011) / DCI P3.
Definition: pixfmt.h:457
color_range
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:391
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
int approximate_gamma
Definition: vf_zscale.c:101
zimg_graph_builder_params alpha_params
Definition: vf_zscale.c:118
enum AVColorSpace in_colorspace out_colorspace
Definition: vf_zscale.c:121
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 format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB)
Definition: pixfmt.h:498
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:468
char * w_expr
width expression string
Definition: vf_zscale.c:103
functionally identical to above
Definition: pixfmt.h:505
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:60
zimg_filter_graph * alpha_graph
Definition: vf_zscale.c:119
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
static int print_zimg_error(AVFilterContext *ctx)
Definition: vf_zscale.c:317
enum AVColorPrimaries in_primaries out_primaries
Definition: vf_zscale.c:123
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
zimg_image_format alpha_dst_format
Definition: vf_zscale.c:117
#define av_cold
Definition: attributes.h:82
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:177
#define av_malloc(s)
AVOptions.
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:497
#define f(width, name)
Definition: cbs_vp9.c:255
#define AV_PIX_FMT_FLAG_FLOAT
The pixel format contains IEEE-754 floating point values.
Definition: pixdesc.h:188
Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16.
Definition: pixfmt.h:506
also ITU-R BT470M / ITU-R BT1700 625 PAL & SECAM
Definition: pixfmt.h:473
AVFILTER_DEFINE_CLASS(zscale)
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:421
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:402
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
int in_h_chr_pos
Definition: vf_zscale.c:108
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
static const AVFilterPad avfilter_vf_zscale_inputs[]
Definition: vf_zscale.c:865
static int convert_range(enum AVColorRange color_range)
Definition: vf_zscale.c:448
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:400
AVColorRange
MPEG vs JPEG YUV range.
Definition: pixfmt.h:520
ptrdiff_t size
Definition: opengl_enc.c:100
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
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:392
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:429
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:443
#define av_log(a,...)
static int convert_matrix(enum AVColorSpace colorspace)
Definition: vf_zscale.c:347
static int query_formats(AVFilterContext *ctx)
Definition: vf_zscale.c:162
A filter pad used for either input or output.
Definition: internal.h:54
enum AVColorRange in_range out_range
Definition: vf_zscale.c:124
static void format_init(zimg_image_format *format, AVFrame *frame, const AVPixFmtDescriptor *desc, int colorspace, int primaries, int transfer, int range, int location)
Definition: vf_zscale.c:460
also FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:448
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:744
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
int width
Definition: frame.h:353
#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 av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
Definition: vf_zscale.c:128
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:148
static int filter_frame(AVFilterLink *link, AVFrame *in)
Definition: vf_zscale.c:505
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * tmp
Definition: vf_zscale.c:113
void * priv
private data for use by the filter
Definition: avfilter.h:353
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:539
#define OFFSET(x)
Definition: vf_zscale.c:739
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:431
GLenum GLint * params
Definition: opengl_enc.c:113
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:550
zimg_image_format alpha_src_format
Definition: vf_zscale.c:117
also ITU-R BT1361 / IEC 61966-2-4 / SMPTE RP177 Annex B
Definition: pixfmt.h:445
simple assert() macros that are a bit more flexible than ISO C assert().
SMPTE ST 428-1 (CIE 1931 XYZ)
Definition: pixfmt.h:455
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:390
#define FFMAX(a, b)
Definition: common.h:94
#define fail()
Definition: checkasm.h:121
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:409
int w
New dimensions.
Definition: vf_zscale.c:86
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
var_name
Definition: aeval.c:46
common internal API header
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:385
AVDictionary * opts
Definition: movenc.c:50
SMPTE ST 2084 for 10-, 12-, 14- and 16-bit systems.
Definition: pixfmt.h:485
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:406
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
#define NAN
Definition: mathematics.h:64
#define FFMIN(a, b)
Definition: common.h:96
char * size_str
Definition: vf_zscale.c:99
zimg_filter_graph * graph
Definition: vf_zscale.c:119
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
static int graph_build(zimg_filter_graph **graph, zimg_graph_builder_params *params, zimg_image_format *src_format, zimg_image_format *dst_format, void **tmp, size_t *tmp_size)
Definition: vf_zscale.c:477
colour filters using Illuminant C
Definition: pixfmt.h:453
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
static void uninit(AVFilterContext *ctx)
Definition: vf_zscale.c:705
ITU-R BT2020 non-constant luminance system.
Definition: pixfmt.h:508
ITU-R 601, SMPTE 274M 296M S314M(DV 4:1:1), mpeg2 4:2:2.
Definition: pixfmt.h:546
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM
Definition: pixfmt.h:450
static const struct ColorPrimaries color_primaries[AVCOL_PRI_NB]
AVFormatContext * ctx
Definition: movenc.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:426
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:386
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:405
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:502
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:523
int colorspace_in
Definition: vf_zscale.c:94
if(ret)
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:398
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:368
also ITU-R BT1361
Definition: pixfmt.h:470
ITU-R BT.2100-0, ICtCp.
Definition: pixfmt.h:513
also ITU-R BT601-6 525 or 625 / ITU-R BT1358 525 or 625 / ITU-R BT1700 NTSC
Definition: pixfmt.h:475
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:395
zimg_graph_builder_params params
Definition: vf_zscale.c:118
double nominal_peak_luminance
Definition: vf_zscale.c:100
int chromal_in
Definition: vf_zscale.c:98
functionally identical to above
Definition: pixfmt.h:452
enum AVChromaLocation in_chromal out_chromal
Definition: vf_zscale.c:125
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
Chromaticity-derived constant luminance system.
Definition: pixfmt.h:512
static int convert_trc(enum AVColorTransferCharacteristic color_trc)
Definition: vf_zscale.c:380
static const char *const var_names[]
Definition: vf_zscale.c:47
char * h_expr
height expression string
Definition: vf_zscale.c:104
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:383
zimg_image_format src_format
Definition: vf_zscale.c:116
int out_h_chr_pos
Definition: vf_zscale.c:106
void * buf
Definition: avisynth_c.h:766
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
int primaries_in
Definition: vf_zscale.c:96
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;}return ac;}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;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Chromaticity-derived non-constant luminance system.
Definition: pixfmt.h:511
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:387
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_zscale.c:715
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
int colorspace
Definition: vf_zscale.c:89
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
static int convert_primaries(enum AVColorPrimaries color_primaries)
Definition: vf_zscale.c:417
Rational number (pair of numerator and denominator).
Definition: rational.h:58
"Logarithmic transfer characteristic (100 * Sqrt(10) : 1 range)"
Definition: pixfmt.h:479
const char * name
Filter name.
Definition: avfilter.h:148
static int convert_chroma_location(enum AVChromaLocation chroma_location)
Definition: vf_zscale.c:327
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:384
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
enum AVChromaLocation chroma_location
Definition: frame.h:552
#define snprintf
Definition: snprintf.h:34
static av_always_inline uint32_t av_float2int(float f)
Reinterpret a float as a 32-bit integer.
Definition: intfloat.h:50
misc parsing utilities
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:396
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:404
size_t tmp_size
Definition: vf_zscale.c:114
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:388
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:394
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
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
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:522
static int config_props(AVFilterLink *outlink)
Definition: vf_zscale.c:194
ITU-R BT2020 constant luminance system.
Definition: pixfmt.h:509
#define AV_PIX_FMT_GBRPF32
Definition: pixfmt.h:416
int
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define AV_PIX_FMT_GBRAPF32
Definition: pixfmt.h:417
IEC 61966-2-1 (sRGB or sYCC)
Definition: pixfmt.h:482
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
AVFilter ff_vf_zscale
Definition: vf_zscale.c:883
also ITU-R BT470BG
Definition: pixfmt.h:474
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:423
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
static const AVOption zscale_options[]
Definition: vf_zscale.c:742
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
int den
Denominator.
Definition: rational.h:60
int force_original_aspect_ratio
Definition: vf_zscale.c:111
ARIB STD-B67, known as "Hybrid log-gamma".
Definition: pixfmt.h:489
#define FLAGS
Definition: vf_zscale.c:740
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
int in_v_chr_pos
Definition: vf_zscale.c:109
enum AVColorPrimaries color_primaries
Definition: frame.h:541
An instance of a filter.
Definition: avfilter.h:338
ITU-R BT2020 for 10-bit system.
Definition: pixfmt.h:483
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
Definition: pixfmt.h:451
ITU-R BT2020.
Definition: pixfmt.h:454
int height
Definition: frame.h:353
FILE * out
Definition: movenc.c:54
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:542
enum AVColorTransferCharacteristic color_trc
Definition: frame.h:543
MPEG-1 4:2:0, JPEG 4:2:0, H.263 4:2:0.
Definition: pixfmt.h:545
#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:2438
internal API functions
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
int depth
Number of bits in the component.
Definition: pixdesc.h:58
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:57
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:449
enum AVColorTransferCharacteristic in_trc out_trc
Definition: vf_zscale.c:122
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:399
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
int step
Number of elements between 2 horizontally consecutive pixels.
Definition: pixdesc.h:41
simple arithmetic expression evaluator
"Logarithmic transfer characteristic (100:1 range)"
Definition: pixfmt.h:478