FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vf_scale.c
Go to the documentation of this file.
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 typedef struct ScaleContext {
75  const AVClass *class;
76  struct SwsContext *sws; ///< software scaler context
77  struct SwsContext *isws[2]; ///< software scaler context for interlaced material
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  char *size_str;
88  unsigned int flags; ///sws flags
89  double param[2]; // sws params
90 
91  int hsub, vsub; ///< chroma subsampling
92  int slice_y; ///< top of current output slice
93  int input_is_pal; ///< set to 1 if the input format is paletted
94  int output_is_pal; ///< set to 1 if the output format is paletted
96 
97  char *w_expr; ///< width expression string
98  char *h_expr; ///< height expression string
99  char *flags_str;
100 
103 
104  int in_range;
106 
111 
113 } ScaleContext;
114 
116 
118 {
119  ScaleContext *scale = ctx->priv;
120  int ret;
121 
122  if (scale->size_str && (scale->w_expr || scale->h_expr)) {
123  av_log(ctx, AV_LOG_ERROR,
124  "Size and width/height expressions cannot be set at the same time.\n");
125  return AVERROR(EINVAL);
126  }
127 
128  if (scale->w_expr && !scale->h_expr)
129  FFSWAP(char *, scale->w_expr, scale->size_str);
130 
131  if (scale->size_str) {
132  char buf[32];
133  if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
134  av_log(ctx, AV_LOG_ERROR,
135  "Invalid size '%s'\n", scale->size_str);
136  return ret;
137  }
138  snprintf(buf, sizeof(buf)-1, "%d", scale->w);
139  av_opt_set(scale, "w", buf, 0);
140  snprintf(buf, sizeof(buf)-1, "%d", scale->h);
141  av_opt_set(scale, "h", buf, 0);
142  }
143  if (!scale->w_expr)
144  av_opt_set(scale, "w", "iw", 0);
145  if (!scale->h_expr)
146  av_opt_set(scale, "h", "ih", 0);
147 
148  av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
149  scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
150 
151  scale->flags = 0;
152 
153  if (scale->flags_str) {
154  const AVClass *class = sws_get_class();
155  const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
157  int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
158  if (ret < 0)
159  return ret;
160  }
161  scale->opts = *opts;
162  *opts = NULL;
163 
164  return 0;
165 }
166 
167 static av_cold void uninit(AVFilterContext *ctx)
168 {
169  ScaleContext *scale = ctx->priv;
170  sws_freeContext(scale->sws);
171  sws_freeContext(scale->isws[0]);
172  sws_freeContext(scale->isws[1]);
173  scale->sws = NULL;
174  av_dict_free(&scale->opts);
175 }
176 
178 {
180  enum AVPixelFormat pix_fmt;
181  int ret;
182 
183  if (ctx->inputs[0]) {
184  const AVPixFmtDescriptor *desc = NULL;
185  formats = NULL;
186  while ((desc = av_pix_fmt_desc_next(desc))) {
187  pix_fmt = av_pix_fmt_desc_get_id(desc);
188  if ((sws_isSupportedInput(pix_fmt) ||
190  && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
191  ff_formats_unref(&formats);
192  return ret;
193  }
194  }
195  ff_formats_ref(formats, &ctx->inputs[0]->out_formats);
196  }
197  if (ctx->outputs[0]) {
198  const AVPixFmtDescriptor *desc = NULL;
199  formats = NULL;
200  while ((desc = av_pix_fmt_desc_next(desc))) {
201  pix_fmt = av_pix_fmt_desc_get_id(desc);
202  if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
204  && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
205  ff_formats_unref(&formats);
206  return ret;
207  }
208  }
209  ff_formats_ref(formats, &ctx->outputs[0]->in_formats);
210  }
211 
212  return 0;
213 }
214 
215 static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
216 {
217  if (!s)
218  s = "bt601";
219 
220  if (s && strstr(s, "bt709")) {
221  colorspace = AVCOL_SPC_BT709;
222  } else if (s && strstr(s, "fcc")) {
223  colorspace = AVCOL_SPC_FCC;
224  } else if (s && strstr(s, "smpte240m")) {
225  colorspace = AVCOL_SPC_SMPTE240M;
226  } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
227  colorspace = AVCOL_SPC_BT470BG;
228  }
229 
230  if (colorspace < 1 || colorspace > 7) {
231  colorspace = AVCOL_SPC_BT470BG;
232  }
233 
234  return sws_getCoefficients(colorspace);
235 }
236 
237 static int config_props(AVFilterLink *outlink)
238 {
239  AVFilterContext *ctx = outlink->src;
240  AVFilterLink *inlink0 = outlink->src->inputs[0];
241  AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
242  outlink->src->inputs[1] :
243  outlink->src->inputs[0];
244  enum AVPixelFormat outfmt = outlink->format;
245  ScaleContext *scale = ctx->priv;
246  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
247  const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
248  int64_t w, h;
249  double var_values[VARS_NB], res;
250  char *expr;
251  int ret;
252  int factor_w, factor_h;
253 
254  var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
255  var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
256  var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
257  var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
258  var_values[VAR_A] = (double) inlink->w / inlink->h;
259  var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
260  (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
261  var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
262  var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
263  var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
264  var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
265  var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
266 
267  /* evaluate width and height */
268  av_expr_parse_and_eval(&res, (expr = scale->w_expr),
269  var_names, var_values,
270  NULL, NULL, NULL, NULL, NULL, 0, ctx);
271  scale->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
272  if ((ret = av_expr_parse_and_eval(&res, (expr = scale->h_expr),
273  var_names, var_values,
274  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
275  goto fail;
276  scale->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
277  /* evaluate again the width, as it may depend on the output height */
278  if ((ret = av_expr_parse_and_eval(&res, (expr = scale->w_expr),
279  var_names, var_values,
280  NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
281  goto fail;
282  scale->w = res;
283 
284  w = scale->w;
285  h = scale->h;
286 
287  /* Check if it is requested that the result has to be divisible by a some
288  * factor (w or h = -n with n being the factor). */
289  factor_w = 1;
290  factor_h = 1;
291  if (w < -1) {
292  factor_w = -w;
293  }
294  if (h < -1) {
295  factor_h = -h;
296  }
297 
298  if (w < 0 && h < 0)
299  scale->w = scale->h = 0;
300 
301  if (!(w = scale->w))
302  w = inlink->w;
303  if (!(h = scale->h))
304  h = inlink->h;
305 
306  /* Make sure that the result is divisible by the factor we determined
307  * earlier. If no factor was set, it is nothing will happen as the default
308  * factor is 1 */
309  if (w < 0)
310  w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w;
311  if (h < 0)
312  h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h;
313 
314  /* Note that force_original_aspect_ratio may overwrite the previous set
315  * dimensions so that it is not divisible by the set factors anymore. */
316  if (scale->force_original_aspect_ratio) {
317  int tmp_w = av_rescale(h, inlink->w, inlink->h);
318  int tmp_h = av_rescale(w, inlink->h, inlink->w);
319 
320  if (scale->force_original_aspect_ratio == 1) {
321  w = FFMIN(tmp_w, w);
322  h = FFMIN(tmp_h, h);
323  } else {
324  w = FFMAX(tmp_w, w);
325  h = FFMAX(tmp_h, h);
326  }
327  }
328 
329  if (w > INT_MAX || h > INT_MAX ||
330  (h * inlink->w) > INT_MAX ||
331  (w * inlink->h) > INT_MAX)
332  av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
333 
334  outlink->w = w;
335  outlink->h = h;
336 
337  /* TODO: make algorithm configurable */
338 
339  scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL ||
341  if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
344 
345  if (scale->sws)
346  sws_freeContext(scale->sws);
347  if (scale->isws[0])
348  sws_freeContext(scale->isws[0]);
349  if (scale->isws[1])
350  sws_freeContext(scale->isws[1]);
351  scale->isws[0] = scale->isws[1] = scale->sws = NULL;
352  if (inlink0->w == outlink->w &&
353  inlink0->h == outlink->h &&
354  !scale->out_color_matrix &&
355  scale->in_range == scale->out_range &&
356  inlink0->format == outlink->format)
357  ;
358  else {
359  struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
360  int i;
361 
362  for (i = 0; i < 3; i++) {
363  struct SwsContext **s = swscs[i];
364  *s = sws_alloc_context();
365  if (!*s)
366  return AVERROR(ENOMEM);
367 
368  av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
369  av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
370  av_opt_set_int(*s, "src_format", inlink0->format, 0);
371  av_opt_set_int(*s, "dstw", outlink->w, 0);
372  av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
373  av_opt_set_int(*s, "dst_format", outfmt, 0);
374  av_opt_set_int(*s, "sws_flags", scale->flags, 0);
375  av_opt_set_int(*s, "param0", scale->param[0], 0);
376  av_opt_set_int(*s, "param1", scale->param[1], 0);
377  if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
378  av_opt_set_int(*s, "src_range",
379  scale->in_range == AVCOL_RANGE_JPEG, 0);
380  if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
381  av_opt_set_int(*s, "dst_range",
382  scale->out_range == AVCOL_RANGE_JPEG, 0);
383 
384  if (scale->opts) {
385  AVDictionaryEntry *e = NULL;
386  while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
387  if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
388  return ret;
389  }
390  }
391  /* Override YUV420P settings to have the correct (MPEG-2) chroma positions
392  * MPEG-2 chroma positions are used by convention
393  * XXX: support other 4:2:0 pixel formats */
394  if (inlink0->format == AV_PIX_FMT_YUV420P) {
395  scale->in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
396  }
397 
398  if (outlink->format == AV_PIX_FMT_YUV420P) {
399  scale->out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
400  }
401 
402  av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
403  av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0);
404  av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
405  av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0);
406 
407  if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
408  return ret;
409  if (!scale->interlaced)
410  break;
411  }
412  }
413 
414  if (inlink->sample_aspect_ratio.num){
415  outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
416  } else
417  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
418 
419  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",
420  inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
422  outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
423  outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
424  scale->flags);
425  return 0;
426 
427 fail:
429  "Error when evaluating the expression '%s'.\n"
430  "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
431  expr, scale->w_expr, scale->h_expr);
432  return ret;
433 }
434 
435 static int config_props_ref(AVFilterLink *outlink)
436 {
437  AVFilterLink *inlink = outlink->src->inputs[1];
438 
439  outlink->w = inlink->w;
440  outlink->h = inlink->h;
441  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
442  outlink->time_base = inlink->time_base;
443 
444  return 0;
445 }
446 
447 static int request_frame(AVFilterLink *outlink)
448 {
449  return ff_request_frame(outlink->src->inputs[0]);
450 }
451 
452 static int request_frame_ref(AVFilterLink *outlink)
453 {
454  return ff_request_frame(outlink->src->inputs[1]);
455 }
456 
457 static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
458 {
459  ScaleContext *scale = link->dst->priv;
460  const uint8_t *in[4];
461  uint8_t *out[4];
462  int in_stride[4],out_stride[4];
463  int i;
464 
465  for(i=0; i<4; i++){
466  int vsub= ((i+1)&2) ? scale->vsub : 0;
467  in_stride[i] = cur_pic->linesize[i] * mul;
468  out_stride[i] = out_buf->linesize[i] * mul;
469  in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
470  out[i] = out_buf->data[i] + field * out_buf->linesize[i];
471  }
472  if(scale->input_is_pal)
473  in[1] = cur_pic->data[1];
474  if(scale->output_is_pal)
475  out[1] = out_buf->data[1];
476 
477  return sws_scale(sws, in, in_stride, y/mul, h,
478  out,out_stride);
479 }
480 
481 static int filter_frame(AVFilterLink *link, AVFrame *in)
482 {
483  ScaleContext *scale = link->dst->priv;
484  AVFilterLink *outlink = link->dst->outputs[0];
485  AVFrame *out;
487  char buf[32];
488  int in_range;
489 
491  av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
492 
493  if( in->width != link->w
494  || in->height != link->h
495  || in->format != link->format) {
496  int ret;
497  snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
498  av_opt_set(scale, "w", buf, 0);
499  snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
500  av_opt_set(scale, "h", buf, 0);
501 
502  link->dst->inputs[0]->format = in->format;
503  link->dst->inputs[0]->w = in->width;
504  link->dst->inputs[0]->h = in->height;
505 
506  if ((ret = config_props(outlink)) < 0)
507  return ret;
508  }
509 
510  if (!scale->sws)
511  return ff_filter_frame(outlink, in);
512 
513  scale->hsub = desc->log2_chroma_w;
514  scale->vsub = desc->log2_chroma_h;
515 
516  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
517  if (!out) {
518  av_frame_free(&in);
519  return AVERROR(ENOMEM);
520  }
521 
522  av_frame_copy_props(out, in);
523  out->width = outlink->w;
524  out->height = outlink->h;
525 
526  if(scale->output_is_pal)
527  avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
528 
529  in_range = av_frame_get_color_range(in);
530 
531  if ( scale->in_color_matrix
532  || scale->out_color_matrix
533  || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
534  || in_range != AVCOL_RANGE_UNSPECIFIED
535  || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
536  int in_full, out_full, brightness, contrast, saturation;
537  const int *inv_table, *table;
538 
539  sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
540  (int **)&table, &out_full,
541  &brightness, &contrast, &saturation);
542 
543  if (scale->in_color_matrix)
544  inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in));
545  if (scale->out_color_matrix)
547  else if (scale->in_color_matrix)
548  table = inv_table;
549 
550  if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
551  in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
552  else if (in_range != AVCOL_RANGE_UNSPECIFIED)
553  in_full = (in_range == AVCOL_RANGE_JPEG);
554  if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
555  out_full = (scale->out_range == AVCOL_RANGE_JPEG);
556 
557  sws_setColorspaceDetails(scale->sws, inv_table, in_full,
558  table, out_full,
559  brightness, contrast, saturation);
560  if (scale->isws[0])
561  sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
562  table, out_full,
563  brightness, contrast, saturation);
564  if (scale->isws[1])
565  sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
566  table, out_full,
567  brightness, contrast, saturation);
568  }
569 
571  (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
572  (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
573  INT_MAX);
574 
575  if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
576  scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
577  scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
578  }else{
579  scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
580  }
581 
582  av_frame_free(&in);
583  return ff_filter_frame(outlink, out);
584 }
585 
587 {
588  AVFilterLink *outlink = link->dst->outputs[1];
589 
590  return ff_filter_frame(outlink, in);
591 }
592 
593 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
594  char *res, int res_len, int flags)
595 {
596  ScaleContext *scale = ctx->priv;
597  int ret;
598 
599  if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
600  || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
601 
602  int old_w = scale->w;
603  int old_h = scale->h;
604  AVFilterLink *outlink = ctx->outputs[0];
605 
606  av_opt_set(scale, cmd, args, 0);
607  if ((ret = config_props(outlink)) < 0) {
608  scale->w = old_w;
609  scale->h = old_h;
610  }
611  } else
612  ret = AVERROR(ENOSYS);
613 
614  return ret;
615 }
616 
617 static const AVClass *child_class_next(const AVClass *prev)
618 {
619  return prev ? NULL : sws_get_class();
620 }
621 
622 #define OFFSET(x) offsetof(ScaleContext, x)
623 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
624 
625 static const AVOption scale_options[] = {
626  { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
627  { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
628  { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
629  { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
630  { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
631  { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_INT, {.i64 = 0 }, -1, 1, FLAGS },
632  { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
633  { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
634  { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS },
635  { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
636  { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
637  { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
638  { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
639  { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
640  { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
641  { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
642  { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
643  { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
644  { "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 },
645  { "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 },
646  { "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 },
647  { "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 },
648  { "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" },
649  { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
650  { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
651  { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
652  { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
653  { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
654  { NULL }
655 };
656 
657 static const AVClass scale_class = {
658  .class_name = "scale",
659  .item_name = av_default_item_name,
660  .option = scale_options,
661  .version = LIBAVUTIL_VERSION_INT,
662  .category = AV_CLASS_CATEGORY_FILTER,
663  .child_class_next = child_class_next,
664 };
665 
667  {
668  .name = "default",
669  .type = AVMEDIA_TYPE_VIDEO,
670  .filter_frame = filter_frame,
671  },
672  { NULL }
673 };
674 
676  {
677  .name = "default",
678  .type = AVMEDIA_TYPE_VIDEO,
679  .config_props = config_props,
680  },
681  { NULL }
682 };
683 
685  .name = "scale",
686  .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
687  .init_dict = init_dict,
688  .uninit = uninit,
689  .query_formats = query_formats,
690  .priv_size = sizeof(ScaleContext),
691  .priv_class = &scale_class,
692  .inputs = avfilter_vf_scale_inputs,
693  .outputs = avfilter_vf_scale_outputs,
695 };
696 
697 static const AVClass scale2ref_class = {
698  .class_name = "scale2ref",
699  .item_name = av_default_item_name,
700  .option = scale_options,
701  .version = LIBAVUTIL_VERSION_INT,
702  .category = AV_CLASS_CATEGORY_FILTER,
703  .child_class_next = child_class_next,
704 };
705 
707  {
708  .name = "default",
709  .type = AVMEDIA_TYPE_VIDEO,
710  .filter_frame = filter_frame,
711  },
712  {
713  .name = "ref",
714  .type = AVMEDIA_TYPE_VIDEO,
715  .filter_frame = filter_frame_ref,
716  },
717  { NULL }
718 };
719 
721  {
722  .name = "default",
723  .type = AVMEDIA_TYPE_VIDEO,
724  .config_props = config_props,
725  .request_frame= request_frame,
726  },
727  {
728  .name = "ref",
729  .type = AVMEDIA_TYPE_VIDEO,
730  .config_props = config_props_ref,
731  .request_frame= request_frame_ref,
732  },
733  { NULL }
734 };
735 
736 AVFilter ff_vf_scale2ref = {
737  .name = "scale2ref",
738  .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
739  .init_dict = init_dict,
740  .uninit = uninit,
741  .query_formats = query_formats,
742  .priv_size = sizeof(ScaleContext),
743  .priv_class = &scale2ref_class,
744  .inputs = avfilter_vf_scale2ref_inputs,
745  .outputs = avfilter_vf_scale2ref_outputs,
747 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:115
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:519
#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:117
static enum AVPixelFormat pix_fmt
#define FLAGS
Definition: vf_scale.c:623
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2129
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
int in_h_chr_pos
Definition: vf_scale.c:109
AVOption.
Definition: opt.h:255
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:142
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
Main libavfilter public API header.
enum AVColorRange av_frame_get_color_range(const AVFrame *frame)
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
Definition: utils.c:947
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:523
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:457
int num
numerator
Definition: rational.h:44
int in_v_chr_pos
Definition: vf_scale.c:110
int out_h_chr_pos
Definition: vf_scale.c:107
int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
Definition: utils.c:243
int force_original_aspect_ratio
Definition: vf_scale.c:112
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:109
const AVClass * sws_get_class(void)
Get the AVClass for swsContext.
Definition: options.c:97
int vsub
chroma subsampling
Definition: vf_scale.c:91
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
int output_is_pal
set to 1 if the output format is paletted
Definition: vf_scale.c:94
const char * name
Pad name.
Definition: internal.h:69
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:641
char * w_expr
width expression string
Definition: vf_scale.c:97
static int query_formats(AVFilterContext *ctx)
Definition: vf_scale.c:177
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1158
uint8_t
#define av_cold
Definition: attributes.h:74
char * h_expr
height expression string
Definition: vf_scale.c:98
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
AVOptions.
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:517
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:152
AVFilter ff_vf_scale2ref
Definition: vf_scale.c:115
static const int * parse_yuv_type(const char *s, enum AVColorSpace colorspace)
Definition: vf_scale.c:215
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
int sws_init_context(struct SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
Definition: utils.c:1102
static const AVClass scale_class
Definition: vf_scale.c:657
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:367
external API header
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:63
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:718
int width
width and height of the video frame
Definition: frame.h:220
#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:89
static const AVClass scale2ref_class
Definition: vf_scale.c:697
static const AVOption scale_options[]
Definition: vf_scale.c:625
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:148
#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:175
void * priv
private data for use by the filter
Definition: avfilter.h:654
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:199
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:491
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:323
#define FFMAX(a, b)
Definition: common.h:79
#define fail()
Definition: checkasm.h:57
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_scale.c:593
int w
New dimensions.
Definition: vf_scale.c:86
static int config_props(AVFilterLink *outlink)
Definition: vf_scale.c:237
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:1481
common internal API header
char * out_color_matrix
Definition: vf_scale.c:102
enum AVPixelFormat av_pix_fmt_desc_get_id(const AVPixFmtDescriptor *desc)
Definition: pixdesc.c:2148
#define AVCOL_SPC_YCGCO
Definition: pixfmt.h:531
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_scale.c:167
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:127
static const AVFilterPad avfilter_vf_scale_outputs[]
Definition: vf_scale.c:675
#define FFMIN(a, b)
Definition: common.h:81
float y
double param[2]
sws flags
Definition: vf_scale.c:89
uint8_t interlaced
Definition: mxfenc.c:1807
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:422
static int request_frame(AVFilterLink *outlink)
Definition: vf_scale.c:447
static const AVClass * child_class_next(const AVClass *prev)
Definition: vf_scale.c:617
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
Definition: pixdesc.h:141
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
Definition: utils.c:2225
int interlaced
Definition: vf_scale.c:95
const int * sws_getCoefficients(int colorspace)
Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDet...
Definition: yuv2rgb.c:49
#define sws_isSupportedInput(x)
struct SwsFilterDescriptor * desc
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:826
char * flags_str
Definition: vf_scale.c:99
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:522
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:540
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:232
static int config_props_ref(AVFilterLink *outlink)
Definition: vf_scale.c:435
static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
Definition: vf_scale.c:586
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:85
#define OFFSET(x)
Definition: vf_scale.c:622
AVFilter ff_vf_scale
Definition: vf_scale.c:684
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
struct SwsContext * sws
software scaler context
Definition: vf_scale.c:76
static int request_frame_ref(AVFilterLink *outlink)
Definition: vf_scale.c:452
uint8_t flags
Definition: pixdesc.h:90
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
static const AVFilterPad avfilter_vf_scale_inputs[]
Definition: vf_scale.c:666
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:252
static const AVFilterPad avfilter_vf_scale2ref_outputs[]
Definition: vf_scale.c:720
AVDictionary * opts
Definition: vf_scale.c:78
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:1036
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:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
rational number numerator/denominator
Definition: rational.h:43
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:458
const char * name
Filter name.
Definition: avfilter.h:474
#define snprintf
Definition: snprintf.h:34
int input_is_pal
set to 1 if the input format is paletted
Definition: vf_scale.c:93
static const char *const var_names[]
Definition: vf_scale.c:44
unsigned int flags
Definition: vf_scale.c:88
misc parsing utilities
struct SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
Definition: utils.c:1022
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
int out_v_chr_pos
Definition: vf_scale.c:108
static int flags
Definition: cpu.c:47
struct SwsContext * isws[2]
software scaler context for interlaced material
Definition: vf_scale.c:77
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
static int filter_frame(AVFilterLink *link, AVFrame *in)
Definition: vf_scale.c:481
int in_range
Definition: vf_scale.c:104
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:539
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
double param[2]
Input parameters for scaling algorithms that need them.
int out_range
Definition: vf_scale.c:105
#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:620
char * size_str
Definition: vf_scale.c:87
char * key
Definition: dict.h:87
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:92
Definition: vf_scale.c:64
char * value
Definition: dict.h:88
#define NAN
Definition: math.h:28
char * in_color_matrix
Definition: vf_scale.c:101
A list of supported formats for one end of a filter link.
Definition: formats.h:64
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-> out
An instance of a filter.
Definition: avfilter.h:633
int height
Definition: frame.h:220
#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:72
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:343
#define FFSWAP(type, a, b)
Definition: common.h:84
enum AVColorSpace colorspace
Definition: dirac.c:102
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:2050
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
Definition: opt.c:369
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:636
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:553
static const AVFilterPad avfilter_vf_scale2ref_inputs[]
Definition: vf_scale.c:706
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:2136