FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_scale.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 374 597 62.6%
Functions: 12 21 57.1%
Branches: 248 507 48.9%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2007 Bobby Bingham
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * scale video filter
24 */
25
26 #include <float.h>
27 #include <stdio.h>
28 #include <string.h>
29
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "formats.h"
33 #include "framesync.h"
34 #include "libavutil/pixfmt.h"
35 #include "scale_eval.h"
36 #include "video.h"
37 #include "libavutil/eval.h"
38 #include "libavutil/imgutils_internal.h"
39 #include "libavutil/internal.h"
40 #include "libavutil/mem.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/parseutils.h"
43 #include "libavutil/pixdesc.h"
44 #include "libswscale/swscale.h"
45
46 static const char *const var_names[] = {
47 "in_w", "iw",
48 "in_h", "ih",
49 "out_w", "ow",
50 "out_h", "oh",
51 "a",
52 "sar",
53 "dar",
54 "hsub",
55 "vsub",
56 "ohsub",
57 "ovsub",
58 "n",
59 "t",
60 "ref_w", "rw",
61 "ref_h", "rh",
62 "ref_a",
63 "ref_sar",
64 "ref_dar", "rdar",
65 "ref_hsub",
66 "ref_vsub",
67 "ref_n",
68 "ref_t",
69 "ref_pos",
70 /* Legacy variables for scale2ref */
71 "main_w",
72 "main_h",
73 "main_a",
74 "main_sar",
75 "main_dar", "mdar",
76 "main_hsub",
77 "main_vsub",
78 "main_n",
79 "main_t",
80 "main_pos",
81 NULL
82 };
83
84 enum var_name {
85 VAR_IN_W, VAR_IW,
86 VAR_IN_H, VAR_IH,
87 VAR_OUT_W, VAR_OW,
88 VAR_OUT_H, VAR_OH,
89 VAR_A,
90 VAR_SAR,
91 VAR_DAR,
92 VAR_HSUB,
93 VAR_VSUB,
94 VAR_OHSUB,
95 VAR_OVSUB,
96 VAR_N,
97 VAR_T,
98 VAR_REF_W, VAR_RW,
99 VAR_REF_H, VAR_RH,
100 VAR_REF_A,
101 VAR_REF_SAR,
102 VAR_REF_DAR, VAR_RDAR,
103 VAR_REF_HSUB,
104 VAR_REF_VSUB,
105 VAR_REF_N,
106 VAR_REF_T,
107 VAR_REF_POS,
108 VAR_S2R_MAIN_W,
109 VAR_S2R_MAIN_H,
110 VAR_S2R_MAIN_A,
111 VAR_S2R_MAIN_SAR,
112 VAR_S2R_MAIN_DAR, VAR_S2R_MDAR,
113 VAR_S2R_MAIN_HSUB,
114 VAR_S2R_MAIN_VSUB,
115 VAR_S2R_MAIN_N,
116 VAR_S2R_MAIN_T,
117 VAR_S2R_MAIN_POS,
118 VARS_NB
119 };
120
121 enum EvalMode {
122 EVAL_MODE_INIT,
123 EVAL_MODE_FRAME,
124 EVAL_MODE_NB
125 };
126
127 typedef struct ScaleContext {
128 const AVClass *class;
129 SwsContext *sws;
130 FFFrameSync fs;
131
132 /**
133 * New dimensions. Special values are:
134 * 0 = original width/height
135 * -1 = keep original aspect
136 * -N = try to keep aspect but make sure it is divisible by N
137 */
138 int w, h;
139 char *size_str;
140 double param[2]; // sws params
141
142 int hsub, vsub; ///< chroma subsampling
143 int slice_y; ///< top of current output slice
144 int interlaced;
145 int uses_ref;
146
147 char *w_expr; ///< width expression string
148 char *h_expr; ///< height expression string
149 AVExpr *w_pexpr;
150 AVExpr *h_pexpr;
151 double var_values[VARS_NB];
152
153 char *flags_str;
154
155 int in_color_matrix;
156 int out_color_matrix;
157 int in_primaries;
158 int out_primaries;
159 int in_transfer;
160 int out_transfer;
161 int in_range;
162 int out_range;
163
164 int in_chroma_loc;
165 int out_chroma_loc;
166 int out_h_chr_pos;
167 int out_v_chr_pos;
168 int in_h_chr_pos;
169 int in_v_chr_pos;
170
171 int force_original_aspect_ratio;
172 int force_divisible_by;
173 int reset_sar;
174
175 int eval_mode; ///< expression evaluation mode
176
177 } ScaleContext;
178
179 const FFFilter ff_vf_scale2ref;
180 #define IS_SCALE2REF(ctx) ((ctx)->filter == &ff_vf_scale2ref.p)
181
182 static int config_props(AVFilterLink *outlink);
183
184 22494 static int check_exprs(AVFilterContext *ctx)
185 {
186 22494 ScaleContext *scale = ctx->priv;
187 22494 unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
188
189
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 22494 if (!scale->w_pexpr && !scale->h_pexpr)
190 ✗ return AVERROR(EINVAL);
191
192
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 22494 if (scale->w_pexpr)
193 22494 av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
194
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 22494 if (scale->h_pexpr)
195 11266 av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
196
197
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 22494 if (vars_w[VAR_OUT_W] || vars_w[VAR_OW]) {
198 ✗ av_log(ctx, AV_LOG_ERROR, "Width expression cannot be self-referencing: '%s'.\n", scale->w_expr);
199 ✗ return AVERROR(EINVAL);
200 }
201
202
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 22494 if (vars_h[VAR_OUT_H] || vars_h[VAR_OH]) {
203 ✗ av_log(ctx, AV_LOG_ERROR, "Height expression cannot be self-referencing: '%s'.\n", scale->h_expr);
204 ✗ return AVERROR(EINVAL);
205 }
206
207
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 22494 if ((vars_w[VAR_OUT_H] || vars_w[VAR_OH]) &&
208 ✗ (vars_h[VAR_OUT_W] || vars_h[VAR_OW])) {
209 ✗ av_log(ctx, AV_LOG_WARNING, "Circular references detected for width '%s' and height '%s' - possibly invalid.\n", scale->w_expr, scale->h_expr);
210 }
211
212
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 22494 if (vars_w[VAR_REF_W] || vars_h[VAR_REF_W] ||
213
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 22494 vars_w[VAR_RW] || vars_h[VAR_RW] ||
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 22490 vars_w[VAR_REF_H] || vars_h[VAR_REF_H] ||
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 22490 vars_w[VAR_RH] || vars_h[VAR_RH] ||
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 22490 vars_w[VAR_REF_A] || vars_h[VAR_REF_A] ||
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 22490 vars_w[VAR_REF_SAR] || vars_h[VAR_REF_SAR] ||
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 22490 vars_w[VAR_REF_DAR] || vars_h[VAR_REF_DAR] ||
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 22490 vars_w[VAR_RDAR] || vars_h[VAR_RDAR] ||
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 22490 vars_w[VAR_REF_POS] || vars_h[VAR_REF_POS]) {
225 4 scale->uses_ref = 1;
226 }
227
228
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 22494 if (!IS_SCALE2REF(ctx) &&
229
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 22494 (vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
230
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 22494 vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
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 22494 vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
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 22494 vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
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 22494 vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
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 22494 vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
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 22494 vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
240 ✗ av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n");
241 ✗ return AVERROR(EINVAL);
242 }
243
244
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 22494 if (scale->eval_mode == EVAL_MODE_INIT &&
245
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 22494 vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
250 ✗ av_log(ctx, AV_LOG_ERROR, "Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode.\n");
251 ✗ return AVERROR(EINVAL);
252 }
253
254 22494 return 0;
255 }
256
257 22494 static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
258 {
259 22494 ScaleContext *scale = ctx->priv;
260 22494 int ret, is_inited = 0;
261 22494 char *old_str_expr = NULL;
262 22494 AVExpr *old_pexpr = NULL;
263
264
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 22494 if (str_expr) {
265 ✗ old_str_expr = av_strdup(str_expr);
266 ✗ if (!old_str_expr)
267 ✗ return AVERROR(ENOMEM);
268 ✗ av_opt_set(scale, var, args, 0);
269 }
270
271
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 22494 if (*pexpr_ptr) {
272 38 old_pexpr = *pexpr_ptr;
273 38 *pexpr_ptr = NULL;
274 38 is_inited = 1;
275 }
276
277 22494 ret = av_expr_parse(pexpr_ptr, args, var_names,
278 NULL, NULL, NULL, NULL, 0, ctx);
279
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 22494 if (ret < 0) {
280 ✗ av_log(ctx, AV_LOG_ERROR, "Cannot parse expression for %s: '%s'\n", var, args);
281 ✗ goto revert;
282 }
283
284 22494 ret = check_exprs(ctx);
285
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 22494 if (ret < 0)
286 ✗ goto revert;
287
288
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 22494 if (is_inited && (ret = config_props(ctx->outputs[0])) < 0)
289 ✗ goto revert;
290
291 22494 av_expr_free(old_pexpr);
292 22494 old_pexpr = NULL;
293 22494 av_freep(&old_str_expr);
294
295 22494 return 0;
296
297 ✗ revert:
298 ✗ av_expr_free(*pexpr_ptr);
299 ✗ *pexpr_ptr = NULL;
300 ✗ if (old_str_expr) {
301 ✗ av_opt_set(scale, var, old_str_expr, 0);
302 ✗ av_free(old_str_expr);
303 }
304 ✗ if (old_pexpr)
305 ✗ *pexpr_ptr = old_pexpr;
306
307 ✗ return ret;
308 }
309
310 11228 static av_cold int preinit(AVFilterContext *ctx)
311 {
312 11228 ScaleContext *scale = ctx->priv;
313
314 11228 scale->sws = sws_alloc_context();
315
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 11228 if (!scale->sws)
316 ✗ return AVERROR(ENOMEM);
317
318 // set threads=0, so we can later check whether the user modified it
319 11228 scale->sws->threads = 0;
320
321 11228 ff_framesync_preinit(&scale->fs);
322
323 11228 return 0;
324 }
325
326 static int do_scale(FFFrameSync *fs);
327
328 11228 static av_cold int init(AVFilterContext *ctx)
329 {
330 11228 ScaleContext *scale = ctx->priv;
331 int ret;
332
333
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 11228 if (IS_SCALE2REF(ctx))
334 ✗ av_log(ctx, AV_LOG_WARNING, "scale2ref is deprecated, use scale=rw:rh instead\n");
335
336
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 11228 if (scale->size_str && (scale->w_expr || scale->h_expr)) {
337 ✗ av_log(ctx, AV_LOG_ERROR,
338 "Size and width/height expressions cannot be set at the same time.\n");
339 ✗ return AVERROR(EINVAL);
340 }
341
342
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 11228 if (scale->w_expr && !scale->h_expr)
343 ✗ FFSWAP(char *, scale->w_expr, scale->size_str);
344
345
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 11228 if (scale->size_str) {
346 char buf[32];
347 ✗ if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
348 ✗ av_log(ctx, AV_LOG_ERROR,
349 "Invalid size '%s'\n", scale->size_str);
350 ✗ return ret;
351 }
352 ✗ snprintf(buf, sizeof(buf)-1, "%d", scale->w);
353 ✗ av_opt_set(scale, "w", buf, 0);
354 ✗ snprintf(buf, sizeof(buf)-1, "%d", scale->h);
355 ✗ av_opt_set(scale, "h", buf, 0);
356 }
357
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 11228 if (!scale->w_expr)
358 9360 av_opt_set(scale, "w", "iw", 0);
359
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 11228 if (!scale->h_expr)
360 9360 av_opt_set(scale, "h", "ih", 0);
361
362 11228 ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
363
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 11228 if (ret < 0)
364 ✗ return ret;
365
366 11228 ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
367
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 11228 if (ret < 0)
368 ✗ return ret;
369
370
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 11228 if (scale->in_primaries != -1 && !sws_test_primaries(scale->in_primaries, 0)) {
371 ✗ av_log(ctx, AV_LOG_ERROR, "Unsupported input primaries '%s'\n",
372 ✗ av_color_primaries_name(scale->in_primaries));
373 ✗ return AVERROR(EINVAL);
374 }
375
376
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 11228 if (scale->out_primaries != -1 && !sws_test_primaries(scale->out_primaries, 1)) {
377 ✗ av_log(ctx, AV_LOG_ERROR, "Unsupported output primaries '%s'\n",
378 ✗ av_color_primaries_name(scale->out_primaries));
379 ✗ return AVERROR(EINVAL);
380 }
381
382
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 11228 if (scale->in_transfer != -1 && !sws_test_transfer(scale->in_transfer, 0)) {
383 ✗ av_log(ctx, AV_LOG_ERROR, "Unsupported input transfer '%s'\n",
384 ✗ av_color_transfer_name(scale->in_transfer));
385 ✗ return AVERROR(EINVAL);
386 }
387
388
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 11228 if (scale->out_transfer != -1 && !sws_test_transfer(scale->out_transfer, 1)) {
389 ✗ av_log(ctx, AV_LOG_ERROR, "Unsupported output transfer '%s'\n",
390 ✗ av_color_transfer_name(scale->out_transfer));
391 ✗ return AVERROR(EINVAL);
392 }
393
394
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 11228 if (scale->in_color_matrix != -1 && !sws_test_colorspace(scale->in_color_matrix, 0)) {
395 ✗ av_log(ctx, AV_LOG_ERROR, "Unsupported input color matrix '%s'\n",
396 ✗ av_color_space_name(scale->in_color_matrix));
397 ✗ return AVERROR(EINVAL);
398 }
399
400
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 11228 if (scale->out_color_matrix != -1 && !sws_test_colorspace(scale->out_color_matrix, 1)) {
401 ✗ av_log(ctx, AV_LOG_ERROR, "Unsupported output color matrix '%s'\n",
402 ✗ av_color_space_name(scale->out_color_matrix));
403 ✗ return AVERROR(EINVAL);
404 }
405
406 11228 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
407 11228 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
408
409
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 11228 if (scale->flags_str && *scale->flags_str) {
410 2272 ret = av_opt_set(scale->sws, "sws_flags", scale->flags_str, 0);
411
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 2272 if (ret < 0)
412 ✗ return ret;
413 }
414
415
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 33684 for (int i = 0; i < FF_ARRAY_ELEMS(scale->param); i++)
416
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 22456 if (scale->param[i] != DBL_MAX)
417 ✗ scale->sws->scaler_params[i] = scale->param[i];
418
419 11228 scale->sws->src_h_chr_pos = scale->in_h_chr_pos;
420 11228 scale->sws->src_v_chr_pos = scale->in_v_chr_pos;
421 11228 scale->sws->dst_h_chr_pos = scale->out_h_chr_pos;
422 11228 scale->sws->dst_v_chr_pos = scale->out_v_chr_pos;
423
424 // use generic thread-count if the user did not set it explicitly
425
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 11228 if (!scale->sws->threads)
426 11228 scale->sws->threads = ff_filter_get_nb_threads(ctx);
427
428
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 11228 if (!IS_SCALE2REF(ctx) && scale->uses_ref) {
429 2 AVFilterPad pad = {
430 .name = "ref",
431 .type = AVMEDIA_TYPE_VIDEO,
432 };
433 2 ret = ff_append_inpad(ctx, &pad);
434
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 2 if (ret < 0)
435 ✗ return ret;
436 }
437
438 11228 return 0;
439 }
440
441 11228 static av_cold void uninit(AVFilterContext *ctx)
442 {
443 11228 ScaleContext *scale = ctx->priv;
444 11228 av_expr_free(scale->w_pexpr);
445 11228 av_expr_free(scale->h_pexpr);
446 11228 scale->w_pexpr = scale->h_pexpr = NULL;
447 11228 ff_framesync_uninit(&scale->fs);
448 11228 sws_free_context(&scale->sws);
449 11228 }
450
451 6663 static int query_formats(const AVFilterContext *ctx,
452 AVFilterFormatsConfig **cfg_in,
453 AVFilterFormatsConfig **cfg_out)
454 {
455 6663 const ScaleContext *scale = ctx->priv;
456 AVFilterFormats *formats;
457 const AVPixFmtDescriptor *desc;
458 enum AVPixelFormat pix_fmt;
459 int ret;
460
461 6663 desc = NULL;
462 6663 formats = NULL;
463
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 1785684 while ((desc = av_pix_fmt_desc_next(desc))) {
464 1779021 pix_fmt = av_pix_fmt_desc_get_id(desc);
465
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 1779021 if (sws_test_format(pix_fmt, 0)) {
466
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 1545816 if ((ret = ff_add_format(&formats, pix_fmt)) < 0)
467 ✗ return ret;
468 }
469 }
470
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 6663 if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
471 ✗ return ret;
472
473 6663 desc = NULL;
474 6663 formats = NULL;
475
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 1785684 while ((desc = av_pix_fmt_desc_next(desc))) {
476 1779021 pix_fmt = av_pix_fmt_desc_get_id(desc);
477
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 1779021 if (sws_test_format(pix_fmt, 1) || pix_fmt == AV_PIX_FMT_PAL8) {
478
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 1365915 if ((ret = ff_add_format(&formats, pix_fmt)) < 0)
479 ✗ return ret;
480 }
481 }
482
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 6663 if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
483 ✗ return ret;
484
485 /* accept all supported inputs, even if user overrides their properties */
486 6663 formats = ff_all_color_spaces();
487
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 119934 for (int i = 0; i < formats->nb_formats; i++) {
488
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 113271 if (!sws_test_colorspace(formats->formats[i], 0)) {
489
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 306498 for (int j = i--; j + 1 < formats->nb_formats; j++)
490 246531 formats->formats[j] = formats->formats[j + 1];
491 59967 formats->nb_formats--;
492 }
493 }
494
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 6663 if ((ret = ff_formats_ref(formats, &cfg_in[0]->color_spaces)) < 0)
495 ✗ return ret;
496
497
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 6663 if ((ret = ff_formats_ref(ff_all_color_ranges(),
498 6663 &cfg_in[0]->color_ranges)) < 0)
499 ✗ return ret;
500
501 /* propagate output properties if overridden */
502
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 6663 if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED) {
503 2 formats = ff_make_formats_list_singleton(scale->out_color_matrix);
504 } else {
505 6661 formats = ff_all_color_spaces();
506
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 119898 for (int i = 0; i < formats->nb_formats; i++) {
507
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 113237 if (!sws_test_colorspace(formats->formats[i], 1)) {
508
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 306406 for (int j = i--; j + 1 < formats->nb_formats; j++)
509 246457 formats->formats[j] = formats->formats[j + 1];
510 59949 formats->nb_formats--;
511 }
512 }
513 }
514
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 6663 if ((ret = ff_formats_ref(formats, &cfg_out[0]->color_spaces)) < 0)
515 ✗ return ret;
516
517 13326 formats = scale->out_range != AVCOL_RANGE_UNSPECIFIED
518 2 ? ff_make_formats_list_singleton(scale->out_range)
519
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 6663 : ff_all_color_ranges();
520
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 6663 if ((ret = ff_formats_ref(formats, &cfg_out[0]->color_ranges)) < 0)
521 ✗ return ret;
522
523
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 6663 if (scale->sws->alpha_blend) {
524 ✗ if ((ret = ff_formats_ref(ff_make_formats_list_singleton(AVALPHA_MODE_STRAIGHT),
525 ✗ &cfg_in[0]->alpha_modes)) < 0)
526 ✗ return ret;
527 }
528
529 6663 return 0;
530 }
531
532 6675 static int scale_eval_dimensions(AVFilterContext *ctx)
533 {
534 6675 ScaleContext *scale = ctx->priv;
535 6675 const char scale2ref = IS_SCALE2REF(ctx);
536
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 6675 const AVFilterLink *inlink = scale2ref ? ctx->inputs[1] : ctx->inputs[0];
537 6675 const AVFilterLink *outlink = ctx->outputs[0];
538 6675 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
539 6675 const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
540 char *expr;
541 int eval_w, eval_h;
542 int ret;
543 double res;
544 const AVPixFmtDescriptor *main_desc;
545 const AVFilterLink *main_link;
546
547
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 6675 if (scale2ref) {
548 ✗ main_link = ctx->inputs[0];
549 ✗ main_desc = av_pix_fmt_desc_get(main_link->format);
550 }
551
552 6675 scale->var_values[VAR_IN_W] = scale->var_values[VAR_IW] = inlink->w;
553 6675 scale->var_values[VAR_IN_H] = scale->var_values[VAR_IH] = inlink->h;
554 6675 scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = NAN;
555 6675 scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = NAN;
556 6675 scale->var_values[VAR_A] = (double) inlink->w / inlink->h;
557 13350 scale->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
558
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 6675 (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
559 6675 scale->var_values[VAR_DAR] = scale->var_values[VAR_A] * scale->var_values[VAR_SAR];
560 6675 scale->var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
561 6675 scale->var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
562 6675 scale->var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
563 6675 scale->var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
564
565
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 6675 if (scale2ref) {
566 ✗ scale->var_values[VAR_S2R_MAIN_W] = main_link->w;
567 ✗ scale->var_values[VAR_S2R_MAIN_H] = main_link->h;
568 ✗ scale->var_values[VAR_S2R_MAIN_A] = (double) main_link->w / main_link->h;
569 ✗ scale->var_values[VAR_S2R_MAIN_SAR] = main_link->sample_aspect_ratio.num ?
570 ✗ (double) main_link->sample_aspect_ratio.num / main_link->sample_aspect_ratio.den : 1;
571 ✗ scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] =
572 ✗ scale->var_values[VAR_S2R_MAIN_A] * scale->var_values[VAR_S2R_MAIN_SAR];
573 ✗ scale->var_values[VAR_S2R_MAIN_HSUB] = 1 << main_desc->log2_chroma_w;
574 ✗ scale->var_values[VAR_S2R_MAIN_VSUB] = 1 << main_desc->log2_chroma_h;
575 }
576
577
2/2
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 6675 if (scale->uses_ref) {
578 1 const AVFilterLink *reflink = ctx->inputs[1];
579 1 const AVPixFmtDescriptor *ref_desc = av_pix_fmt_desc_get(reflink->format);
580 1 scale->var_values[VAR_REF_W] = scale->var_values[VAR_RW] = reflink->w;
581 1 scale->var_values[VAR_REF_H] = scale->var_values[VAR_RH] = reflink->h;
582 1 scale->var_values[VAR_REF_A] = (double) reflink->w / reflink->h;
583 2 scale->var_values[VAR_REF_SAR] = reflink->sample_aspect_ratio.num ?
584
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 1 (double) reflink->sample_aspect_ratio.num / reflink->sample_aspect_ratio.den : 1;
585 1 scale->var_values[VAR_REF_DAR] = scale->var_values[VAR_RDAR] =
586 1 scale->var_values[VAR_REF_A] * scale->var_values[VAR_REF_SAR];
587 1 scale->var_values[VAR_REF_HSUB] = 1 << ref_desc->log2_chroma_w;
588 1 scale->var_values[VAR_REF_VSUB] = 1 << ref_desc->log2_chroma_h;
589 }
590
591 6675 res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
592
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 6675 eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
593
594 6675 res = av_expr_eval(scale->h_pexpr, scale->var_values, NULL);
595
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 6675 if (isnan(res)) {
596 ✗ expr = scale->h_expr;
597 ✗ ret = AVERROR(EINVAL);
598 ✗ goto fail;
599 }
600
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 6675 eval_h = scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = (int) res == 0 ? inlink->h : (int) res;
601
602 6675 res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
603
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 6675 if (isnan(res)) {
604 ✗ expr = scale->w_expr;
605 ✗ ret = AVERROR(EINVAL);
606 ✗ goto fail;
607 }
608
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 6675 eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
609
610 6675 scale->w = eval_w;
611 6675 scale->h = eval_h;
612
613 6675 return 0;
614
615 ✗ fail:
616 ✗ av_log(ctx, AV_LOG_ERROR,
617 "Error when evaluating the expression '%s'.\n", expr);
618 ✗ return ret;
619 }
620
621 6675 static int config_props(AVFilterLink *outlink)
622 {
623 6675 AVFilterContext *ctx = outlink->src;
624 6675 AVFilterLink *inlink0 = outlink->src->inputs[0];
625 13350 AVFilterLink *inlink = IS_SCALE2REF(ctx) ?
626
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 6675 outlink->src->inputs[1] :
627 6675 outlink->src->inputs[0];
628 6675 ScaleContext *scale = ctx->priv;
629 6675 uint8_t *flags_val = NULL;
630 6675 double w_adj = 1.0;
631 int ret;
632
633
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 6675 if ((ret = scale_eval_dimensions(ctx)) < 0)
634 ✗ goto fail;
635
636 6675 outlink->w = scale->w;
637 6675 outlink->h = scale->h;
638
639
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 6675 if (scale->reset_sar)
640 ✗ w_adj = IS_SCALE2REF(ctx) ? scale->var_values[VAR_S2R_MAIN_SAR] :
641 scale->var_values[VAR_SAR];
642
643 6675 ret = ff_scale_adjust_dimensions(inlink, &outlink->w, &outlink->h,
644 scale->force_original_aspect_ratio,
645 scale->force_divisible_by, w_adj);
646
647
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 6675 if (ret < 0)
648 ✗ goto fail;
649
650 6675 if (outlink->w > INT_MAX ||
651 outlink->h > INT_MAX ||
652
1/2
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 6675 (outlink->h * (uint64_t)inlink->w) > INT_MAX ||
653
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 6675 (outlink->w * (uint64_t)inlink->h) > INT_MAX)
654 ✗ av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
655
656 /* TODO: make algorithm configurable */
657
658
1/2
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 6675 if (scale->reset_sar)
659 ✗ outlink->sample_aspect_ratio = (AVRational){1, 1};
660
2/2
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 6675 else if (inlink0->sample_aspect_ratio.num){
661 2537 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
662 } else
663 4138 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
664
665 6675 av_opt_get(scale->sws, "sws_flags", 0, &flags_val);
666 20025 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s csp:%s range:%s sar:%d/%d -> w:%d h:%d fmt:%s csp:%s range:%s sar:%d/%d flags:%s\n",
667 6675 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
668 av_color_space_name(inlink->colorspace), av_color_range_name(inlink->color_range),
669 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
670 6675 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
671 av_color_space_name(outlink->colorspace), av_color_range_name(outlink->color_range),
672 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
673 flags_val);
674 6675 av_freep(&flags_val);
675
676
4/4
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 6675 if (inlink->w != outlink->w || inlink->h != outlink->h) {
677 465 av_frame_side_data_remove_by_props(&outlink->side_data, &outlink->nb_side_data,
678 AV_SIDE_DATA_PROP_SIZE_DEPENDENT);
679 }
680
681
2/4
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 6675 if (scale->in_primaries != scale->out_primaries || scale->in_transfer != scale->out_transfer) {
682 ✗ av_frame_side_data_remove_by_props(&outlink->side_data, &outlink->nb_side_data,
683 AV_SIDE_DATA_PROP_COLOR_DEPENDENT);
684 }
685
686
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 6675 if (!IS_SCALE2REF(ctx)) {
687 6675 ff_framesync_uninit(&scale->fs);
688 6675 ret = ff_framesync_init(&scale->fs, ctx, ctx->nb_inputs);
689
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 6675 if (ret < 0)
690 ✗ return ret;
691 6675 scale->fs.on_event = do_scale;
692 6675 scale->fs.in[0].time_base = ctx->inputs[0]->time_base;
693 6675 scale->fs.in[0].sync = 1;
694 6675 scale->fs.in[0].before = EXT_STOP;
695 6675 scale->fs.in[0].after = EXT_STOP;
696
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 6675 if (scale->uses_ref) {
697
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 1 av_assert0(ctx->nb_inputs == 2);
698 1 scale->fs.in[1].time_base = ctx->inputs[1]->time_base;
699 1 scale->fs.in[1].sync = 0;
700 1 scale->fs.in[1].before = EXT_NULL;
701 1 scale->fs.in[1].after = EXT_INFINITY;
702 }
703
704 6675 ret = ff_framesync_configure(&scale->fs);
705
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 6675 if (ret < 0)
706 ✗ return ret;
707 }
708
709 6675 return 0;
710
711 ✗ fail:
712 ✗ return ret;
713 }
714
715 ✗ static int config_props_ref(AVFilterLink *outlink)
716 {
717 ✗ AVFilterLink *inlink = outlink->src->inputs[1];
718 ✗ FilterLink *il = ff_filter_link(inlink);
719 ✗ FilterLink *ol = ff_filter_link(outlink);
720
721 ✗ outlink->w = inlink->w;
722 ✗ outlink->h = inlink->h;
723 ✗ outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
724 ✗ outlink->time_base = inlink->time_base;
725 ✗ ol->frame_rate = il->frame_rate;
726 ✗ outlink->colorspace = inlink->colorspace;
727 ✗ outlink->color_range = inlink->color_range;
728
729 ✗ return 0;
730 }
731
732 ✗ static int request_frame(AVFilterLink *outlink)
733 {
734 ✗ return ff_request_frame(outlink->src->inputs[0]);
735 }
736
737 ✗ static int request_frame_ref(AVFilterLink *outlink)
738 {
739 ✗ return ff_request_frame(outlink->src->inputs[1]);
740 }
741
742 /* Takes over ownership of *frame_in, passes ownership of *frame_out to caller */
743 110429 static int scale_frame(AVFilterLink *link, AVFrame **frame_in,
744 AVFrame **frame_out)
745 {
746 110429 FilterLink *inl = ff_filter_link(link);
747 110429 AVFilterContext *ctx = link->dst;
748 110429 ScaleContext *scale = ctx->priv;
749 110429 AVFilterLink *outlink = ctx->outputs[0];
750 110429 AVFrame *out, *in = *frame_in;
751 110429 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
752 char buf[32];
753 int ret, flags_orig, frame_changed;
754
755 110429 *frame_in = NULL;
756
757 331286 frame_changed = in->width != link->w ||
758
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 110428 in->height != link->h ||
759
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 110428 in->format != link->format ||
760
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 110428 in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
761
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 110428 in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
762
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 331269 in->colorspace != link->colorspace ||
763
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 110412 in->color_range != link->color_range;
764
765
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 110429 if (scale->eval_mode == EVAL_MODE_FRAME || frame_changed) {
766 19 unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
767
768 19 av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
769 19 av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
770
771
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 19 if (scale->eval_mode == EVAL_MODE_FRAME &&
772 ✗ !frame_changed &&
773 ✗ !IS_SCALE2REF(ctx) &&
774 ✗ !(vars_w[VAR_N] || vars_w[VAR_T]) &&
775 ✗ !(vars_h[VAR_N] || vars_h[VAR_T]) &&
776 ✗ scale->w && scale->h)
777 ✗ goto scale;
778
779
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 19 if (scale->eval_mode == EVAL_MODE_INIT) {
780 19 snprintf(buf, sizeof(buf) - 1, "%d", scale->w);
781 19 av_opt_set(scale, "w", buf, 0);
782 19 snprintf(buf, sizeof(buf) - 1, "%d", scale->h);
783 19 av_opt_set(scale, "h", buf, 0);
784
785 19 ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
786
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 19 if (ret < 0)
787 ✗ goto err;
788
789 19 ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
790
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 19 if (ret < 0)
791 ✗ goto err;
792 }
793
794
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 19 if (IS_SCALE2REF(ctx)) {
795 ✗ scale->var_values[VAR_S2R_MAIN_N] = inl->frame_count_out;
796 ✗ scale->var_values[VAR_S2R_MAIN_T] = TS2T(in->pts, link->time_base);
797 } else {
798 19 scale->var_values[VAR_N] = inl->frame_count_out;
799
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 19 scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
800 }
801
802 19 link->dst->inputs[0]->format = in->format;
803 19 link->dst->inputs[0]->w = in->width;
804 19 link->dst->inputs[0]->h = in->height;
805 19 link->dst->inputs[0]->colorspace = in->colorspace;
806 19 link->dst->inputs[0]->color_range = in->color_range;
807
808 19 link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
809 19 link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
810
811
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 19 if ((ret = config_props(outlink)) < 0)
812 ✗ goto err;
813 }
814
815 110410 scale:
816 110429 scale->hsub = desc->log2_chroma_w;
817 110429 scale->vsub = desc->log2_chroma_h;
818
819 110429 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
820
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 110429 if (!out) {
821 ✗ ret = AVERROR(ENOMEM);
822 ✗ goto err;
823 }
824
825
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 110429 if (scale->in_color_matrix != -1)
826 4 in->colorspace = scale->in_color_matrix;
827
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 110429 if (scale->in_primaries != -1)
828 ✗ in->color_primaries = scale->in_primaries;
829
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 110429 if (scale->in_transfer != -1)
830 ✗ in->color_trc = scale->in_transfer;
831
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 110429 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
832 4 in->color_range = scale->in_range;
833 110429 in->chroma_location = scale->in_chroma_loc;
834
835 110429 flags_orig = in->flags;
836
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 110429 if (scale->interlaced > 0)
837 ✗ in->flags |= AV_FRAME_FLAG_INTERLACED;
838
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 110429 else if (!scale->interlaced)
839 110429 in->flags &= ~AV_FRAME_FLAG_INTERLACED;
840
841 110429 av_frame_copy_props(out, in);
842 110429 out->width = outlink->w;
843 110429 out->height = outlink->h;
844 110429 out->color_range = outlink->color_range;
845 110429 out->colorspace = outlink->colorspace;
846 110429 out->alpha_mode = outlink->alpha_mode;
847
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 110429 if (scale->out_chroma_loc != AVCHROMA_LOC_UNSPECIFIED)
848 25 out->chroma_location = scale->out_chroma_loc;
849
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 110429 if (scale->out_primaries != -1)
850 ✗ out->color_primaries = scale->out_primaries;
851
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 110429 if (scale->out_transfer != -1)
852 ✗ out->color_trc = scale->out_transfer;
853
854
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 110429 if (out->width != in->width || out->height != in->height) {
855 6197 av_frame_side_data_remove_by_props(&out->side_data, &out->nb_side_data,
856 AV_SIDE_DATA_PROP_SIZE_DEPENDENT);
857 }
858
859
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 110429 if (in->color_primaries != out->color_primaries || in->color_trc != out->color_trc) {
860 ✗ av_frame_side_data_remove_by_props(&out->side_data, &out->nb_side_data,
861 AV_SIDE_DATA_PROP_COLOR_DEPENDENT);
862 }
863
864
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 110429 if (scale->reset_sar) {
865 ✗ out->sample_aspect_ratio = outlink->sample_aspect_ratio;
866 } else {
867 110429 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
868 110429 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
869 110429 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
870 INT_MAX);
871 }
872
873
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 110429 if (sws_is_noop(out, in)) {
874 4918 av_frame_free(&out);
875 4918 in->flags = flags_orig;
876 4918 *frame_out = in;
877 4918 return 0;
878 }
879
880
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 105511 if (out->format == AV_PIX_FMT_PAL8) {
881 589 out->format = AV_PIX_FMT_BGR8;
882 589 avpriv_set_systematic_pal2((uint32_t*) out->data[1], out->format);
883 }
884
885 105511 ret = sws_scale_frame(scale->sws, out, in);
886 105511 av_frame_free(&in);
887 105511 out->flags = flags_orig;
888 105511 out->format = outlink->format; /* undo PAL8 handling */
889
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 105511 if (ret < 0)
890 ✗ av_frame_free(&out);
891 105511 *frame_out = out;
892 105511 return ret;
893
894 ✗ err:
895 ✗ av_frame_free(&in);
896 ✗ return ret;
897 }
898
899 110429 static int do_scale(FFFrameSync *fs)
900 {
901 110429 AVFilterContext *ctx = fs->parent;
902 110429 ScaleContext *scale = ctx->priv;
903 110429 AVFilterLink *outlink = ctx->outputs[0];
904 110429 AVFrame *out, *in = NULL, *ref = NULL;
905 110429 int ret = 0, frame_changed;
906
907 110429 ret = ff_framesync_get_frame(fs, 0, &in, 1);
908
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 110429 if (ret < 0)
909 ✗ goto err;
910
911
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 110429 if (scale->uses_ref) {
912 5 ret = ff_framesync_get_frame(fs, 1, &ref, 0);
913
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 5 if (ret < 0)
914 ✗ goto err;
915 }
916
917
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 110429 if (ref) {
918 5 AVFilterLink *reflink = ctx->inputs[1];
919 5 FilterLink *rl = ff_filter_link(reflink);
920
921 15 frame_changed = ref->width != reflink->w ||
922
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 5 ref->height != reflink->h ||
923
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 5 ref->format != reflink->format ||
924
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 5 ref->sample_aspect_ratio.den != reflink->sample_aspect_ratio.den ||
925
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 5 ref->sample_aspect_ratio.num != reflink->sample_aspect_ratio.num ||
926
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 15 ref->colorspace != reflink->colorspace ||
927
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 5 ref->color_range != reflink->color_range;
928
929
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 5 if (frame_changed) {
930 ✗ reflink->format = ref->format;
931 ✗ reflink->w = ref->width;
932 ✗ reflink->h = ref->height;
933 ✗ reflink->sample_aspect_ratio.num = ref->sample_aspect_ratio.num;
934 ✗ reflink->sample_aspect_ratio.den = ref->sample_aspect_ratio.den;
935 ✗ reflink->colorspace = ref->colorspace;
936 ✗ reflink->color_range = ref->color_range;
937
938 ✗ ret = config_props(outlink);
939 ✗ if (ret < 0)
940 ✗ goto err;
941 }
942
943
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 5 if (scale->eval_mode == EVAL_MODE_FRAME) {
944 ✗ scale->var_values[VAR_REF_N] = rl->frame_count_out;
945 ✗ scale->var_values[VAR_REF_T] = TS2T(ref->pts, reflink->time_base);
946 }
947 }
948
949 110429 ret = scale_frame(ctx->inputs[0], &in, &out);
950
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 110429 if (ret < 0)
951 ✗ goto err;
952
953
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 110429 av_assert0(out);
954 110429 out->pts = av_rescale_q_rnd(fs->pts, fs->time_base, outlink->time_base, AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX);
955 110429 return ff_filter_frame(outlink, out);
956
957 ✗ err:
958 ✗ av_frame_free(&in);
959 ✗ return ret;
960 }
961
962 ✗ static int filter_frame(AVFilterLink *link, AVFrame *in)
963 {
964 ✗ AVFilterContext *ctx = link->dst;
965 ✗ AVFilterLink *outlink = ctx->outputs[0];
966 AVFrame *out;
967 int ret;
968
969 ✗ ret = scale_frame(link, &in, &out);
970 ✗ if (out)
971 ✗ return ff_filter_frame(outlink, out);
972
973 ✗ return ret;
974 }
975
976 ✗ static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
977 {
978 ✗ FilterLink *l = ff_filter_link(link);
979 ✗ ScaleContext *scale = link->dst->priv;
980 ✗ AVFilterLink *outlink = link->dst->outputs[1];
981 int frame_changed;
982
983 ✗ frame_changed = in->width != link->w ||
984 ✗ in->height != link->h ||
985 ✗ in->format != link->format ||
986 ✗ in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
987 ✗ in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
988 ✗ in->colorspace != link->colorspace ||
989 ✗ in->color_range != link->color_range;
990
991 ✗ if (frame_changed) {
992 ✗ link->format = in->format;
993 ✗ link->w = in->width;
994 ✗ link->h = in->height;
995 ✗ link->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
996 ✗ link->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
997 ✗ link->colorspace = in->colorspace;
998 ✗ link->color_range = in->color_range;
999
1000 ✗ config_props_ref(outlink);
1001 }
1002
1003 ✗ if (scale->eval_mode == EVAL_MODE_FRAME) {
1004 ✗ scale->var_values[VAR_N] = l->frame_count_out;
1005 ✗ scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
1006 }
1007
1008 ✗ return ff_filter_frame(outlink, in);
1009 }
1010
1011 ✗ static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
1012 char *res, int res_len, int flags)
1013 {
1014 ✗ ScaleContext *scale = ctx->priv;
1015 char *str_expr;
1016 AVExpr **pexpr_ptr;
1017 int ret, w, h;
1018
1019 ✗ w = !strcmp(cmd, "width") || !strcmp(cmd, "w");
1020 ✗ h = !strcmp(cmd, "height") || !strcmp(cmd, "h");
1021
1022 ✗ if (w || h) {
1023 ✗ str_expr = w ? scale->w_expr : scale->h_expr;
1024 ✗ pexpr_ptr = w ? &scale->w_pexpr : &scale->h_pexpr;
1025
1026 ✗ ret = scale_parse_expr(ctx, str_expr, pexpr_ptr, cmd, args);
1027 } else
1028 ✗ ret = AVERROR(ENOSYS);
1029
1030 ✗ if (ret < 0)
1031 ✗ av_log(ctx, AV_LOG_ERROR, "Failed to process command. Continuing with existing parameters.\n");
1032
1033 ✗ return ret;
1034 }
1035
1036 220519 static int activate(AVFilterContext *ctx)
1037 {
1038 220519 ScaleContext *scale = ctx->priv;
1039 220519 return ff_framesync_activate(&scale->fs);
1040 }
1041
1042 ✗ static const AVClass *child_class_iterate(void **iter)
1043 {
1044 ✗ switch ((uintptr_t) *iter) {
1045 ✗ case 0:
1046 ✗ *iter = (void*)(uintptr_t) 1;
1047 ✗ return sws_get_class();
1048 ✗ case 1:
1049 ✗ *iter = (void*)(uintptr_t) 2;
1050 ✗ return &ff_framesync_class;
1051 }
1052
1053 ✗ return NULL;
1054 }
1055
1056 25328 static void *child_next(void *obj, void *prev)
1057 {
1058 25328 ScaleContext *s = obj;
1059
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 25328 if (!prev)
1060 13274 return s->sws;
1061
2/2
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✓ Branch 1 taken 6027 times.
 12054 if (prev == s->sws)
1062 6027 return &s->fs;
1063 6027 return NULL;
1064 }
1065
1066 #define OFFSET(x) offsetof(ScaleContext, x)
1067 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
1068 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
1069
1070 static const AVOption scale_options[] = {
1071 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1072 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1073 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1074 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1075 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "" }, .flags = FLAGS },
1076 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
1077 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
1078 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
1079 { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_SPC_NB-1, .flags = FLAGS, .unit = "color" },
1080 { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_INT, { .i64 = AVCOL_SPC_UNSPECIFIED }, 0, AVCOL_SPC_NB-1, .flags = FLAGS, .unit = "color"},
1081 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "color" },
1082 { "bt601", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1083 { "bt470", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1084 { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1085 { "bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1086 { "bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709}, 0, 0, FLAGS, .unit = "color" },
1087 { "fcc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_FCC}, 0, 0, FLAGS, .unit = "color" },
1088 { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE240M}, 0, 0, FLAGS, .unit = "color" },
1089 { "bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, 0, 0, FLAGS, .unit = "color" },
1090 { "bt2020nc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, 0, 0, FLAGS, .unit = "color" },
1091 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
1092 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
1093 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
1094 { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
1095 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1096 { "limited", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1097 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1098 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1099 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1100 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1101 { "in_chroma_loc", "set input chroma sample location", OFFSET(in_chroma_loc), AV_OPT_TYPE_INT, { .i64 = AVCHROMA_LOC_UNSPECIFIED }, 0, AVCHROMA_LOC_NB-1, .flags = FLAGS, .unit = "chroma_loc" },
1102 { "out_chroma_loc", "set output chroma sample location", OFFSET(out_chroma_loc), AV_OPT_TYPE_INT, { .i64 = AVCHROMA_LOC_UNSPECIFIED }, 0, AVCHROMA_LOC_NB-1, .flags = FLAGS, .unit = "chroma_loc" },
1103 {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "chroma_loc"},
1104 {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "chroma_loc"},
1105 {"left", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_LEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1106 {"center", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_CENTER}, 0, 0, FLAGS, .unit = "chroma_loc"},
1107 {"topleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOPLEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1108 {"top", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOP}, 0, 0, FLAGS, .unit = "chroma_loc"},
1109 {"bottomleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOMLEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1110 {"bottom", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOM}, 0, 0, FLAGS, .unit = "chroma_loc"},
1111 { "in_primaries", "set input primaries", OFFSET(in_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_PRI_NB-1, .flags = FLAGS, .unit = "primaries" },
1112 { "out_primaries", "set output primaries", OFFSET(out_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_PRI_NB-1, .flags = FLAGS, .unit = "primaries"},
1113 {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "primaries"},
1114 {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT709}, 0, 0, FLAGS, .unit = "primaries"},
1115 {"bt470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470M}, 0, 0, FLAGS, .unit = "primaries"},
1116 {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470BG}, 0, 0, FLAGS, .unit = "primaries"},
1117 {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE170M}, 0, 0, FLAGS, .unit = "primaries"},
1118 {"smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE240M}, 0, 0, FLAGS, .unit = "primaries"},
1119 {"film", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_FILM}, 0, 0, FLAGS, .unit = "primaries"},
1120 {"bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT2020}, 0, 0, FLAGS, .unit = "primaries"},
1121 {"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE428}, 0, 0, FLAGS, .unit = "primaries"},
1122 {"smpte431", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE431}, 0, 0, FLAGS, .unit = "primaries"},
1123 {"smpte432", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE432}, 0, 0, FLAGS, .unit = "primaries"},
1124 {"jedec-p22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_JEDEC_P22}, 0, 0, FLAGS, .unit = "primaries"},
1125 {"ebu3213", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_EBU3213}, 0, 0, FLAGS, .unit = "primaries"},
1126 { "in_transfer", "set output color transfer", OFFSET(in_transfer), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_TRC_NB-1, .flags = FLAGS, .unit = "transfer"},
1127 {"out_transfer", "set output color transfer", OFFSET(out_transfer), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_TRC_NB-1, .flags = FLAGS, .unit = "transfer"},
1128 {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "transfer"},
1129 {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709}, 0, 0, FLAGS, .unit = "transfer"},
1130 {"bt470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA22}, 0, 0, FLAGS, .unit = "transfer"},
1131 {"gamma22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA22}, 0, 0, FLAGS, .unit = "transfer"},
1132 {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA28}, 0, 0, FLAGS, .unit = "transfer"},
1133 {"gamma28", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA28}, 0, 0, FLAGS, .unit = "transfer"},
1134 {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE170M}, 0, 0, FLAGS, .unit = "transfer"},
1135 {"smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE240M}, 0, 0, FLAGS, .unit = "transfer"},
1136 {"linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_LINEAR}, 0, 0, FLAGS, .unit = "transfer"},
1137 {"iec61966-2-1", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_1}, 0, 0, FLAGS, .unit = "transfer"},
1138 {"srgb", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_1}, 0, 0, FLAGS, .unit = "transfer"},
1139 {"iec61966-2-4", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_4}, 0, 0, FLAGS, .unit = "transfer"},
1140 {"xvycc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_4}, 0, 0, FLAGS, .unit = "transfer"},
1141 {"bt1361e", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT1361_ECG}, 0, 0, FLAGS, .unit = "transfer"},
1142 {"bt2020-10", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_10}, 0, 0, FLAGS, .unit = "transfer"},
1143 {"bt2020-12", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_12}, 0, 0, FLAGS, .unit = "transfer"},
1144 {"smpte2084", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084}, 0, 0, FLAGS, .unit = "transfer"},
1145 {"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE428}, 0, 0, FLAGS, .unit = "transfer"},
1146 {"arib-std-b67", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67}, 0, 0, FLAGS, .unit = "transfer"},
1147 { "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 },
1148 { "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 },
1149 { "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 },
1150 { "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 },
1151 { "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, SCALE_FORCE_OAR_NB-1, FLAGS, .unit = "force_oar" },
1152 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = SCALE_FORCE_OAR_DISABLE }, 0, 0, FLAGS, .unit = "force_oar" },
1153 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = SCALE_FORCE_OAR_DECREASE }, 0, 0, FLAGS, .unit = "force_oar" },
1154 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = SCALE_FORCE_OAR_INCREASE }, 0, 0, FLAGS, .unit = "force_oar" },
1155 { "force_divisible_by", "enforce that the output resolution is divisible by a defined integer when force_original_aspect_ratio is used", OFFSET(force_divisible_by), AV_OPT_TYPE_INT, { .i64 = 1}, 1, 256, FLAGS },
1156 { "reset_sar", "reset SAR to 1 and scale to square pixels if scaling proportionally", OFFSET(reset_sar), AV_OPT_TYPE_BOOL, { .i64 = 0}, 0, 1, FLAGS },
1157 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1158 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1159 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, .unit = "eval" },
1160 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
1161 { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
1162 { NULL }
1163 };
1164
1165 static const AVClass scale_class = {
1166 .class_name = "scale",
1167 .item_name = av_default_item_name,
1168 .option = scale_options,
1169 .version = LIBAVUTIL_VERSION_INT,
1170 .category = AV_CLASS_CATEGORY_FILTER,
1171 .child_class_iterate = child_class_iterate,
1172 .child_next = child_next,
1173 };
1174
1175 static const AVFilterPad avfilter_vf_scale_inputs[] = {
1176 {
1177 .name = "default",
1178 .type = AVMEDIA_TYPE_VIDEO,
1179 },
1180 };
1181
1182 static const AVFilterPad avfilter_vf_scale_outputs[] = {
1183 {
1184 .name = "default",
1185 .type = AVMEDIA_TYPE_VIDEO,
1186 .config_props = config_props,
1187 },
1188 };
1189
1190 const FFFilter ff_vf_scale = {
1191 .p.name = "scale",
1192 .p.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
1193 .p.priv_class = &scale_class,
1194 .p.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
1195 .preinit = preinit,
1196 .init = init,
1197 .uninit = uninit,
1198 .priv_size = sizeof(ScaleContext),
1199 FILTER_INPUTS(avfilter_vf_scale_inputs),
1200 FILTER_OUTPUTS(avfilter_vf_scale_outputs),
1201 FILTER_QUERY_FUNC2(query_formats),
1202 .activate = activate,
1203 .process_command = process_command,
1204 };
1205
1206 ✗ static const AVClass *scale2ref_child_class_iterate(void **iter)
1207 {
1208 ✗ const AVClass *c = *iter ? NULL : sws_get_class();
1209 ✗ *iter = (void*)(uintptr_t)c;
1210 ✗ return c;
1211 }
1212
1213 ✗ static void *scale2ref_child_next(void *obj, void *prev)
1214 {
1215 ✗ ScaleContext *s = obj;
1216 ✗ if (!prev)
1217 ✗ return s->sws;
1218 ✗ return NULL;
1219 }
1220
1221 static const AVClass scale2ref_class = {
1222 .class_name = "scale(2ref)",
1223 .item_name = av_default_item_name,
1224 .option = scale_options,
1225 .version = LIBAVUTIL_VERSION_INT,
1226 .category = AV_CLASS_CATEGORY_FILTER,
1227 .child_class_iterate = scale2ref_child_class_iterate,
1228 .child_next = scale2ref_child_next,
1229 };
1230
1231 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
1232 {
1233 .name = "default",
1234 .type = AVMEDIA_TYPE_VIDEO,
1235 .filter_frame = filter_frame,
1236 },
1237 {
1238 .name = "ref",
1239 .type = AVMEDIA_TYPE_VIDEO,
1240 .filter_frame = filter_frame_ref,
1241 },
1242 };
1243
1244 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
1245 {
1246 .name = "default",
1247 .type = AVMEDIA_TYPE_VIDEO,
1248 .config_props = config_props,
1249 .request_frame= request_frame,
1250 },
1251 {
1252 .name = "ref",
1253 .type = AVMEDIA_TYPE_VIDEO,
1254 .config_props = config_props_ref,
1255 .request_frame= request_frame_ref,
1256 },
1257 };
1258
1259 const FFFilter ff_vf_scale2ref = {
1260 .p.name = "scale2ref",
1261 .p.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
1262 .p.priv_class = &scale2ref_class,
1263 .preinit = preinit,
1264 .init = init,
1265 .uninit = uninit,
1266 .priv_size = sizeof(ScaleContext),
1267 FILTER_INPUTS(avfilter_vf_scale2ref_inputs),
1268 FILTER_OUTPUTS(avfilter_vf_scale2ref_outputs),
1269 FILTER_QUERY_FUNC2(query_formats),
1270 .process_command = process_command,
1271 };
1272