FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_scale.c
Date: 2025-04-25 22:50:00
Exec Total Coverage
Lines: 368 586 62.8%
Functions: 12 21 57.1%
Branches: 244 497 49.1%
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 21614 static int check_exprs(AVFilterContext *ctx)
185 {
186 21614 ScaleContext *scale = ctx->priv;
187 21614 unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
188
189
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 21614 if (!scale->w_pexpr && !scale->h_pexpr)
190 ✗ return AVERROR(EINVAL);
191
192
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 21614 if (scale->w_pexpr)
193 21614 av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
194
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 21614 if (scale->h_pexpr)
195 10825 av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
196
197
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 21614 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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 21614 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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 21614 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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 21614 if (vars_w[VAR_REF_W] || vars_h[VAR_REF_W] ||
213
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 21614 vars_w[VAR_RW] || vars_h[VAR_RW] ||
214
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 21610 vars_w[VAR_REF_H] || vars_h[VAR_REF_H] ||
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 21610 vars_w[VAR_RH] || vars_h[VAR_RH] ||
216
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 21610 vars_w[VAR_REF_A] || vars_h[VAR_REF_A] ||
217
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 21610 vars_w[VAR_REF_SAR] || vars_h[VAR_REF_SAR] ||
218
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 21610 vars_w[VAR_REF_DAR] || vars_h[VAR_REF_DAR] ||
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 21610 vars_w[VAR_RDAR] || vars_h[VAR_RDAR] ||
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 21610 vars_w[VAR_REF_HSUB] || vars_h[VAR_REF_HSUB] ||
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 21610 vars_w[VAR_REF_VSUB] || vars_h[VAR_REF_VSUB] ||
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 21610 vars_w[VAR_REF_N] || vars_h[VAR_REF_N] ||
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 21610 vars_w[VAR_REF_T] || vars_h[VAR_REF_T] ||
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 21610 vars_w[VAR_REF_POS] || vars_h[VAR_REF_POS]) {
225 4 scale->uses_ref = 1;
226 }
227
228
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 21614 if (!IS_SCALE2REF(ctx) &&
229
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 21614 (vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
230
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 21614 vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
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 21614 vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
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 21614 vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
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 21614 vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
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 21614 vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] ||
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 21614 vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] ||
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 21614 vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
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 21614 vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
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 21614 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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 21614 if (scale->eval_mode == EVAL_MODE_INIT &&
245
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 21614 vars_w[VAR_T] || vars_h[VAR_T] ||
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 21614 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 21614 return 0;
255 }
256
257 21614 static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
258 {
259 21614 ScaleContext *scale = ctx->priv;
260 21614 int ret, is_inited = 0;
261 21614 char *old_str_expr = NULL;
262 21614 AVExpr *old_pexpr = NULL;
263
264
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 21614 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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 21614 if (*pexpr_ptr) {
272 36 old_pexpr = *pexpr_ptr;
273 36 *pexpr_ptr = NULL;
274 36 is_inited = 1;
275 }
276
277 21614 ret = av_expr_parse(pexpr_ptr, args, var_names,
278 NULL, NULL, NULL, NULL, 0, ctx);
279
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 21614 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 21614 ret = check_exprs(ctx);
285
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 21614 if (ret < 0)
286 ✗ goto revert;
287
288
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 21614 if (is_inited && (ret = config_props(ctx->outputs[0])) < 0)
289 ✗ goto revert;
290
291 21614 av_expr_free(old_pexpr);
292 21614 old_pexpr = NULL;
293 21614 av_freep(&old_str_expr);
294
295 21614 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 10789 static av_cold int preinit(AVFilterContext *ctx)
311 {
312 10789 ScaleContext *scale = ctx->priv;
313
314 10789 scale->sws = sws_alloc_context();
315
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 10789 if (!scale->sws)
316 ✗ return AVERROR(ENOMEM);
317
318 // set threads=0, so we can later check whether the user modified it
319 10789 scale->sws->threads = 0;
320
321 10789 ff_framesync_preinit(&scale->fs);
322
323 10789 return 0;
324 }
325
326 static int do_scale(FFFrameSync *fs);
327
328 10789 static av_cold int init(AVFilterContext *ctx)
329 {
330 10789 ScaleContext *scale = ctx->priv;
331 int ret;
332
333
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 10789 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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 10789 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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 10789 if (scale->w_expr && !scale->h_expr)
343 ✗ FFSWAP(char *, scale->w_expr, scale->size_str);
344
345
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 10789 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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 10789 if (!scale->w_expr)
358 9003 av_opt_set(scale, "w", "iw", 0);
359
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 10789 if (!scale->h_expr)
360 9003 av_opt_set(scale, "h", "ih", 0);
361
362 10789 ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
363
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 10789 if (ret < 0)
364 ✗ return ret;
365
366 10789 ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
367
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 10789 if (ret < 0)
368 ✗ return ret;
369
370
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 10789 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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 10789 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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 10789 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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 10789 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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 10789 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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 10789 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 10789 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
407 10789 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
408
409
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 10789 if (scale->flags_str && *scale->flags_str) {
410 2142 ret = av_opt_set(scale->sws, "sws_flags", scale->flags_str, 0);
411
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 2142 if (ret < 0)
412 ✗ return ret;
413 }
414
415
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 32367 for (int i = 0; i < FF_ARRAY_ELEMS(scale->param); i++)
416
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 21578 if (scale->param[i] != DBL_MAX)
417 ✗ scale->sws->scaler_params[i] = scale->param[i];
418
419 10789 scale->sws->src_h_chr_pos = scale->in_h_chr_pos;
420 10789 scale->sws->src_v_chr_pos = scale->in_v_chr_pos;
421 10789 scale->sws->dst_h_chr_pos = scale->out_h_chr_pos;
422 10789 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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 10789 if (!scale->sws->threads)
426 10789 scale->sws->threads = ff_filter_get_nb_threads(ctx);
427
428
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 10789 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 10789 return 0;
439 }
440
441 10789 static av_cold void uninit(AVFilterContext *ctx)
442 {
443 10789 ScaleContext *scale = ctx->priv;
444 10789 av_expr_free(scale->w_pexpr);
445 10789 av_expr_free(scale->h_pexpr);
446 10789 scale->w_pexpr = scale->h_pexpr = NULL;
447 10789 ff_framesync_uninit(&scale->fs);
448 10789 sws_free_context(&scale->sws);
449 10789 }
450
451 6407 static int query_formats(const AVFilterContext *ctx,
452 AVFilterFormatsConfig **cfg_in,
453 AVFilterFormatsConfig **cfg_out)
454 {
455 6407 const ScaleContext *scale = ctx->priv;
456 AVFilterFormats *formats;
457 const AVPixFmtDescriptor *desc;
458 enum AVPixelFormat pix_fmt;
459 int ret;
460
461 6407 desc = NULL;
462 6407 formats = NULL;
463
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 1659413 while ((desc = av_pix_fmt_desc_next(desc))) {
464 1653006 pix_fmt = av_pix_fmt_desc_get_id(desc);
465
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 1653006 if (sws_test_format(pix_fmt, 0)) {
466
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 1435168 if ((ret = ff_add_format(&formats, pix_fmt)) < 0)
467 ✗ return ret;
468 }
469 }
470
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 6407 if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
471 ✗ return ret;
472
473 6407 desc = NULL;
474 6407 formats = NULL;
475
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 1659413 while ((desc = av_pix_fmt_desc_next(desc))) {
476 1653006 pix_fmt = av_pix_fmt_desc_get_id(desc);
477
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 1653006 if (sws_test_format(pix_fmt, 1) || pix_fmt == AV_PIX_FMT_PAL8) {
478
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 1262179 if ((ret = ff_add_format(&formats, pix_fmt)) < 0)
479 ✗ return ret;
480 }
481 }
482
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 6407 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 6407 formats = ff_all_color_spaces();
487
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 115326 for (int i = 0; i < formats->nb_formats; i++) {
488
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 108919 if (!sws_test_colorspace(formats->formats[i], 0)) {
489
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 294722 for (int j = i--; j + 1 < formats->nb_formats; j++)
490 237059 formats->formats[j] = formats->formats[j + 1];
491 57663 formats->nb_formats--;
492 }
493 }
494
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 6407 if ((ret = ff_formats_ref(formats, &cfg_in[0]->color_spaces)) < 0)
495 ✗ return ret;
496
497
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 6407 if ((ret = ff_formats_ref(ff_all_color_ranges(),
498 6407 &cfg_in[0]->color_ranges)) < 0)
499 ✗ return ret;
500
501 /* propagate output properties if overridden */
502
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 6407 if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED) {
503 2 formats = ff_make_formats_list_singleton(scale->out_color_matrix);
504 } else {
505 6405 formats = ff_all_color_spaces();
506
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 115290 for (int i = 0; i < formats->nb_formats; i++) {
507
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 108885 if (!sws_test_colorspace(formats->formats[i], 1)) {
508
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 294630 for (int j = i--; j + 1 < formats->nb_formats; j++)
509 236985 formats->formats[j] = formats->formats[j + 1];
510 57645 formats->nb_formats--;
511 }
512 }
513 }
514
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 6407 if ((ret = ff_formats_ref(formats, &cfg_out[0]->color_spaces)) < 0)
515 ✗ return ret;
516
517 12814 formats = scale->out_range != AVCOL_RANGE_UNSPECIFIED
518 2 ? ff_make_formats_list_singleton(scale->out_range)
519
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 6407 : ff_all_color_ranges();
520
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 6407 if ((ret = ff_formats_ref(formats, &cfg_out[0]->color_ranges)) < 0)
521 ✗ return ret;
522
523 6407 return 0;
524 }
525
526 6416 static int scale_eval_dimensions(AVFilterContext *ctx)
527 {
528 6416 ScaleContext *scale = ctx->priv;
529 6416 const char scale2ref = IS_SCALE2REF(ctx);
530
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 6416 const AVFilterLink *inlink = scale2ref ? ctx->inputs[1] : ctx->inputs[0];
531 6416 const AVFilterLink *outlink = ctx->outputs[0];
532 6416 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
533 6416 const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
534 char *expr;
535 int eval_w, eval_h;
536 int ret;
537 double res;
538 const AVPixFmtDescriptor *main_desc;
539 const AVFilterLink *main_link;
540
541
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 6416 if (scale2ref) {
542 ✗ main_link = ctx->inputs[0];
543 ✗ main_desc = av_pix_fmt_desc_get(main_link->format);
544 }
545
546 6416 scale->var_values[VAR_IN_W] = scale->var_values[VAR_IW] = inlink->w;
547 6416 scale->var_values[VAR_IN_H] = scale->var_values[VAR_IH] = inlink->h;
548 6416 scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = NAN;
549 6416 scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = NAN;
550 6416 scale->var_values[VAR_A] = (double) inlink->w / inlink->h;
551 12832 scale->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
552
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 6416 (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
553 6416 scale->var_values[VAR_DAR] = scale->var_values[VAR_A] * scale->var_values[VAR_SAR];
554 6416 scale->var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
555 6416 scale->var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
556 6416 scale->var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
557 6416 scale->var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
558
559
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 6416 if (scale2ref) {
560 ✗ scale->var_values[VAR_S2R_MAIN_W] = main_link->w;
561 ✗ scale->var_values[VAR_S2R_MAIN_H] = main_link->h;
562 ✗ scale->var_values[VAR_S2R_MAIN_A] = (double) main_link->w / main_link->h;
563 ✗ scale->var_values[VAR_S2R_MAIN_SAR] = main_link->sample_aspect_ratio.num ?
564 ✗ (double) main_link->sample_aspect_ratio.num / main_link->sample_aspect_ratio.den : 1;
565 ✗ scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] =
566 ✗ scale->var_values[VAR_S2R_MAIN_A] * scale->var_values[VAR_S2R_MAIN_SAR];
567 ✗ scale->var_values[VAR_S2R_MAIN_HSUB] = 1 << main_desc->log2_chroma_w;
568 ✗ scale->var_values[VAR_S2R_MAIN_VSUB] = 1 << main_desc->log2_chroma_h;
569 }
570
571
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 6416 if (scale->uses_ref) {
572 1 const AVFilterLink *reflink = ctx->inputs[1];
573 1 const AVPixFmtDescriptor *ref_desc = av_pix_fmt_desc_get(reflink->format);
574 1 scale->var_values[VAR_REF_W] = scale->var_values[VAR_RW] = reflink->w;
575 1 scale->var_values[VAR_REF_H] = scale->var_values[VAR_RH] = reflink->h;
576 1 scale->var_values[VAR_REF_A] = (double) reflink->w / reflink->h;
577 2 scale->var_values[VAR_REF_SAR] = reflink->sample_aspect_ratio.num ?
578
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 1 (double) reflink->sample_aspect_ratio.num / reflink->sample_aspect_ratio.den : 1;
579 1 scale->var_values[VAR_REF_DAR] = scale->var_values[VAR_RDAR] =
580 1 scale->var_values[VAR_REF_A] * scale->var_values[VAR_REF_SAR];
581 1 scale->var_values[VAR_REF_HSUB] = 1 << ref_desc->log2_chroma_w;
582 1 scale->var_values[VAR_REF_VSUB] = 1 << ref_desc->log2_chroma_h;
583 }
584
585 6416 res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
586
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 6416 eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
587
588 6416 res = av_expr_eval(scale->h_pexpr, scale->var_values, NULL);
589
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 6416 if (isnan(res)) {
590 ✗ expr = scale->h_expr;
591 ✗ ret = AVERROR(EINVAL);
592 ✗ goto fail;
593 }
594
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 6416 eval_h = scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = (int) res == 0 ? inlink->h : (int) res;
595
596 6416 res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
597
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 6416 if (isnan(res)) {
598 ✗ expr = scale->w_expr;
599 ✗ ret = AVERROR(EINVAL);
600 ✗ goto fail;
601 }
602
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 6416 eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
603
604 6416 scale->w = eval_w;
605 6416 scale->h = eval_h;
606
607 6416 return 0;
608
609 ✗ fail:
610 ✗ av_log(ctx, AV_LOG_ERROR,
611 "Error when evaluating the expression '%s'.\n", expr);
612 ✗ return ret;
613 }
614
615 6416 static int config_props(AVFilterLink *outlink)
616 {
617 6416 AVFilterContext *ctx = outlink->src;
618 6416 AVFilterLink *inlink0 = outlink->src->inputs[0];
619 12832 AVFilterLink *inlink = IS_SCALE2REF(ctx) ?
620
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 6416 outlink->src->inputs[1] :
621 6416 outlink->src->inputs[0];
622 6416 ScaleContext *scale = ctx->priv;
623 6416 uint8_t *flags_val = NULL;
624 6416 double w_adj = 1.0;
625 int ret;
626
627
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 6416 if ((ret = scale_eval_dimensions(ctx)) < 0)
628 ✗ goto fail;
629
630 6416 outlink->w = scale->w;
631 6416 outlink->h = scale->h;
632
633
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 6416 if (scale->reset_sar)
634 ✗ w_adj = IS_SCALE2REF(ctx) ? scale->var_values[VAR_S2R_MAIN_SAR] :
635 scale->var_values[VAR_SAR];
636
637 6416 ret = ff_scale_adjust_dimensions(inlink, &outlink->w, &outlink->h,
638 scale->force_original_aspect_ratio,
639 scale->force_divisible_by, w_adj);
640
641
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 6416 if (ret < 0)
642 ✗ goto fail;
643
644 if (outlink->w > INT_MAX ||
645 outlink->h > INT_MAX ||
646 (outlink->h * inlink->w) > INT_MAX ||
647 (outlink->w * inlink->h) > INT_MAX)
648 av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
649
650 /* TODO: make algorithm configurable */
651
652
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 6416 if (scale->reset_sar)
653 ✗ outlink->sample_aspect_ratio = (AVRational){1, 1};
654
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 6416 else if (inlink0->sample_aspect_ratio.num){
655 2397 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
656 } else
657 4019 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
658
659 6416 av_opt_get(scale->sws, "sws_flags", 0, &flags_val);
660 19248 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",
661 6416 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
662 av_color_space_name(inlink->colorspace), av_color_range_name(inlink->color_range),
663 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
664 6416 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
665 av_color_space_name(outlink->colorspace), av_color_range_name(outlink->color_range),
666 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
667 flags_val);
668 6416 av_freep(&flags_val);
669
670
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 6416 if (inlink->w != outlink->w || inlink->h != outlink->h) {
671 456 av_frame_side_data_remove_by_props(&outlink->side_data, &outlink->nb_side_data,
672 AV_SIDE_DATA_PROP_SIZE_DEPENDENT);
673 }
674
675
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 6416 if (scale->in_primaries != scale->out_primaries || scale->in_transfer != scale->out_transfer) {
676 ✗ av_frame_side_data_remove_by_props(&outlink->side_data, &outlink->nb_side_data,
677 AV_SIDE_DATA_PROP_COLOR_DEPENDENT);
678 }
679
680
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 6416 if (!IS_SCALE2REF(ctx)) {
681 6416 ff_framesync_uninit(&scale->fs);
682 6416 ret = ff_framesync_init(&scale->fs, ctx, ctx->nb_inputs);
683
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 6416 if (ret < 0)
684 ✗ return ret;
685 6416 scale->fs.on_event = do_scale;
686 6416 scale->fs.in[0].time_base = ctx->inputs[0]->time_base;
687 6416 scale->fs.in[0].sync = 1;
688 6416 scale->fs.in[0].before = EXT_STOP;
689 6416 scale->fs.in[0].after = EXT_STOP;
690
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 6416 if (scale->uses_ref) {
691
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 1 av_assert0(ctx->nb_inputs == 2);
692 1 scale->fs.in[1].time_base = ctx->inputs[1]->time_base;
693 1 scale->fs.in[1].sync = 0;
694 1 scale->fs.in[1].before = EXT_NULL;
695 1 scale->fs.in[1].after = EXT_INFINITY;
696 }
697
698 6416 ret = ff_framesync_configure(&scale->fs);
699
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 6416 if (ret < 0)
700 ✗ return ret;
701 }
702
703 6416 return 0;
704
705 ✗ fail:
706 ✗ return ret;
707 }
708
709 ✗ static int config_props_ref(AVFilterLink *outlink)
710 {
711 ✗ AVFilterLink *inlink = outlink->src->inputs[1];
712 ✗ FilterLink *il = ff_filter_link(inlink);
713 ✗ FilterLink *ol = ff_filter_link(outlink);
714
715 ✗ outlink->w = inlink->w;
716 ✗ outlink->h = inlink->h;
717 ✗ outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
718 ✗ outlink->time_base = inlink->time_base;
719 ✗ ol->frame_rate = il->frame_rate;
720 ✗ outlink->colorspace = inlink->colorspace;
721 ✗ outlink->color_range = inlink->color_range;
722
723 ✗ return 0;
724 }
725
726 ✗ static int request_frame(AVFilterLink *outlink)
727 {
728 ✗ return ff_request_frame(outlink->src->inputs[0]);
729 }
730
731 ✗ static int request_frame_ref(AVFilterLink *outlink)
732 {
733 ✗ return ff_request_frame(outlink->src->inputs[1]);
734 }
735
736 /* Takes over ownership of *frame_in, passes ownership of *frame_out to caller */
737 103538 static int scale_frame(AVFilterLink *link, AVFrame **frame_in,
738 AVFrame **frame_out)
739 {
740 103538 FilterLink *inl = ff_filter_link(link);
741 103538 AVFilterContext *ctx = link->dst;
742 103538 ScaleContext *scale = ctx->priv;
743 103538 AVFilterLink *outlink = ctx->outputs[0];
744 103538 AVFrame *out, *in = *frame_in;
745 103538 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
746 char buf[32];
747 int ret, flags_orig, frame_changed;
748
749 103538 *frame_in = NULL;
750
751 310613 frame_changed = in->width != link->w ||
752
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 103537 in->height != link->h ||
753
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 103537 in->format != link->format ||
754
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 103537 in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
755
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 103537 in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
756
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 310597 in->colorspace != link->colorspace ||
757
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 103522 in->color_range != link->color_range;
758
759
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 103538 if (scale->eval_mode == EVAL_MODE_FRAME || frame_changed) {
760 18 unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
761
762 18 av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
763 18 av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
764
765
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 18 if (scale->eval_mode == EVAL_MODE_FRAME &&
766 ✗ !frame_changed &&
767 ✗ !IS_SCALE2REF(ctx) &&
768 ✗ !(vars_w[VAR_N] || vars_w[VAR_T]) &&
769 ✗ !(vars_h[VAR_N] || vars_h[VAR_T]) &&
770 ✗ scale->w && scale->h)
771 ✗ goto scale;
772
773
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 18 if (scale->eval_mode == EVAL_MODE_INIT) {
774 18 snprintf(buf, sizeof(buf) - 1, "%d", scale->w);
775 18 av_opt_set(scale, "w", buf, 0);
776 18 snprintf(buf, sizeof(buf) - 1, "%d", scale->h);
777 18 av_opt_set(scale, "h", buf, 0);
778
779 18 ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
780
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 18 if (ret < 0)
781 ✗ goto err;
782
783 18 ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
784
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 18 if (ret < 0)
785 ✗ goto err;
786 }
787
788
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 18 if (IS_SCALE2REF(ctx)) {
789 ✗ scale->var_values[VAR_S2R_MAIN_N] = inl->frame_count_out;
790 ✗ scale->var_values[VAR_S2R_MAIN_T] = TS2T(in->pts, link->time_base);
791 } else {
792 18 scale->var_values[VAR_N] = inl->frame_count_out;
793
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 18 scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
794 }
795
796 18 link->dst->inputs[0]->format = in->format;
797 18 link->dst->inputs[0]->w = in->width;
798 18 link->dst->inputs[0]->h = in->height;
799 18 link->dst->inputs[0]->colorspace = in->colorspace;
800 18 link->dst->inputs[0]->color_range = in->color_range;
801
802 18 link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
803 18 link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
804
805
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 18 if ((ret = config_props(outlink)) < 0)
806 ✗ goto err;
807 }
808
809 103520 scale:
810 103538 scale->hsub = desc->log2_chroma_w;
811 103538 scale->vsub = desc->log2_chroma_h;
812
813 103538 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
814
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 103538 if (!out) {
815 ✗ ret = AVERROR(ENOMEM);
816 ✗ goto err;
817 }
818
819
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 103538 if (scale->in_color_matrix != -1)
820 2 in->colorspace = scale->in_color_matrix;
821
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 103538 if (scale->in_primaries != -1)
822 ✗ in->color_primaries = scale->in_primaries;
823
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 103538 if (scale->in_transfer != -1)
824 ✗ in->color_trc = scale->in_transfer;
825
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 103538 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
826 2 in->color_range = scale->in_range;
827 103538 in->chroma_location = scale->in_chroma_loc;
828
829 103538 flags_orig = in->flags;
830
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 103538 if (scale->interlaced > 0)
831 ✗ in->flags |= AV_FRAME_FLAG_INTERLACED;
832
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 103538 else if (!scale->interlaced)
833 103538 in->flags &= ~AV_FRAME_FLAG_INTERLACED;
834
835 103538 av_frame_copy_props(out, in);
836 103538 out->width = outlink->w;
837 103538 out->height = outlink->h;
838 103538 out->color_range = outlink->color_range;
839 103538 out->colorspace = outlink->colorspace;
840
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 103538 if (scale->out_chroma_loc != AVCHROMA_LOC_UNSPECIFIED)
841 25 out->chroma_location = scale->out_chroma_loc;
842
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 103538 if (scale->out_primaries != -1)
843 ✗ out->color_primaries = scale->out_primaries;
844
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 103538 if (scale->out_transfer != -1)
845 ✗ out->color_trc = scale->out_transfer;
846
847
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 103538 if (out->width != in->width || out->height != in->height) {
848 5915 av_frame_side_data_remove_by_props(&out->side_data, &out->nb_side_data,
849 AV_SIDE_DATA_PROP_SIZE_DEPENDENT);
850 }
851
852
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 103538 if (in->color_primaries != out->color_primaries || in->color_trc != out->color_trc) {
853 ✗ av_frame_side_data_remove_by_props(&out->side_data, &out->nb_side_data,
854 AV_SIDE_DATA_PROP_COLOR_DEPENDENT);
855 }
856
857 103538 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
858 103538 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
859 103538 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
860 INT_MAX);
861
862
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 103538 if (sws_is_noop(out, in)) {
863 4754 av_frame_free(&out);
864 4754 in->flags = flags_orig;
865 4754 *frame_out = in;
866 4754 return 0;
867 }
868
869
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 98784 if (out->format == AV_PIX_FMT_PAL8) {
870 581 out->format = AV_PIX_FMT_BGR8;
871 581 avpriv_set_systematic_pal2((uint32_t*) out->data[1], out->format);
872 }
873
874 98784 ret = sws_scale_frame(scale->sws, out, in);
875 98784 av_frame_free(&in);
876 98784 out->flags = flags_orig;
877 98784 out->format = outlink->format; /* undo PAL8 handling */
878
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 98784 if (ret < 0)
879 ✗ av_frame_free(&out);
880 98784 *frame_out = out;
881 98784 return ret;
882
883 ✗ err:
884 ✗ av_frame_free(&in);
885 ✗ return ret;
886 }
887
888 103538 static int do_scale(FFFrameSync *fs)
889 {
890 103538 AVFilterContext *ctx = fs->parent;
891 103538 ScaleContext *scale = ctx->priv;
892 103538 AVFilterLink *outlink = ctx->outputs[0];
893 103538 AVFrame *out, *in = NULL, *ref = NULL;
894 103538 int ret = 0, frame_changed;
895
896 103538 ret = ff_framesync_get_frame(fs, 0, &in, 1);
897
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 103538 if (ret < 0)
898 ✗ goto err;
899
900
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 103538 if (scale->uses_ref) {
901 5 ret = ff_framesync_get_frame(fs, 1, &ref, 0);
902
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 5 if (ret < 0)
903 ✗ goto err;
904 }
905
906
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 103538 if (ref) {
907 5 AVFilterLink *reflink = ctx->inputs[1];
908 5 FilterLink *rl = ff_filter_link(reflink);
909
910 15 frame_changed = ref->width != reflink->w ||
911
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 5 ref->height != reflink->h ||
912
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 5 ref->format != reflink->format ||
913
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 5 ref->sample_aspect_ratio.den != reflink->sample_aspect_ratio.den ||
914
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 5 ref->sample_aspect_ratio.num != reflink->sample_aspect_ratio.num ||
915
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 15 ref->colorspace != reflink->colorspace ||
916
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 5 ref->color_range != reflink->color_range;
917
918
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 5 if (frame_changed) {
919 ✗ reflink->format = ref->format;
920 ✗ reflink->w = ref->width;
921 ✗ reflink->h = ref->height;
922 ✗ reflink->sample_aspect_ratio.num = ref->sample_aspect_ratio.num;
923 ✗ reflink->sample_aspect_ratio.den = ref->sample_aspect_ratio.den;
924 ✗ reflink->colorspace = ref->colorspace;
925 ✗ reflink->color_range = ref->color_range;
926
927 ✗ ret = config_props(outlink);
928 ✗ if (ret < 0)
929 ✗ goto err;
930 }
931
932
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 5 if (scale->eval_mode == EVAL_MODE_FRAME) {
933 ✗ scale->var_values[VAR_REF_N] = rl->frame_count_out;
934 ✗ scale->var_values[VAR_REF_T] = TS2T(ref->pts, reflink->time_base);
935 }
936 }
937
938 103538 ret = scale_frame(ctx->inputs[0], &in, &out);
939
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 103538 if (ret < 0)
940 ✗ goto err;
941
942
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 103538 av_assert0(out);
943 103538 out->pts = av_rescale_q(fs->pts, fs->time_base, outlink->time_base);
944 103538 return ff_filter_frame(outlink, out);
945
946 ✗ err:
947 ✗ av_frame_free(&in);
948 ✗ return ret;
949 }
950
951 ✗ static int filter_frame(AVFilterLink *link, AVFrame *in)
952 {
953 ✗ AVFilterContext *ctx = link->dst;
954 ✗ AVFilterLink *outlink = ctx->outputs[0];
955 AVFrame *out;
956 int ret;
957
958 ✗ ret = scale_frame(link, &in, &out);
959 ✗ if (out)
960 ✗ return ff_filter_frame(outlink, out);
961
962 ✗ return ret;
963 }
964
965 ✗ static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
966 {
967 ✗ FilterLink *l = ff_filter_link(link);
968 ✗ ScaleContext *scale = link->dst->priv;
969 ✗ AVFilterLink *outlink = link->dst->outputs[1];
970 int frame_changed;
971
972 ✗ frame_changed = in->width != link->w ||
973 ✗ in->height != link->h ||
974 ✗ in->format != link->format ||
975 ✗ in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
976 ✗ in->sample_aspect_ratio.num != link->sample_aspect_ratio.num ||
977 ✗ in->colorspace != link->colorspace ||
978 ✗ in->color_range != link->color_range;
979
980 ✗ if (frame_changed) {
981 ✗ link->format = in->format;
982 ✗ link->w = in->width;
983 ✗ link->h = in->height;
984 ✗ link->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
985 ✗ link->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
986 ✗ link->colorspace = in->colorspace;
987 ✗ link->color_range = in->color_range;
988
989 ✗ config_props_ref(outlink);
990 }
991
992 ✗ if (scale->eval_mode == EVAL_MODE_FRAME) {
993 ✗ scale->var_values[VAR_N] = l->frame_count_out;
994 ✗ scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
995 }
996
997 ✗ return ff_filter_frame(outlink, in);
998 }
999
1000 ✗ static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
1001 char *res, int res_len, int flags)
1002 {
1003 ✗ ScaleContext *scale = ctx->priv;
1004 char *str_expr;
1005 AVExpr **pexpr_ptr;
1006 int ret, w, h;
1007
1008 ✗ w = !strcmp(cmd, "width") || !strcmp(cmd, "w");
1009 ✗ h = !strcmp(cmd, "height") || !strcmp(cmd, "h");
1010
1011 ✗ if (w || h) {
1012 ✗ str_expr = w ? scale->w_expr : scale->h_expr;
1013 ✗ pexpr_ptr = w ? &scale->w_pexpr : &scale->h_pexpr;
1014
1015 ✗ ret = scale_parse_expr(ctx, str_expr, pexpr_ptr, cmd, args);
1016 } else
1017 ✗ ret = AVERROR(ENOSYS);
1018
1019 ✗ if (ret < 0)
1020 ✗ av_log(ctx, AV_LOG_ERROR, "Failed to process command. Continuing with existing parameters.\n");
1021
1022 ✗ return ret;
1023 }
1024
1025 206064 static int activate(AVFilterContext *ctx)
1026 {
1027 206064 ScaleContext *scale = ctx->priv;
1028 206064 return ff_framesync_activate(&scale->fs);
1029 }
1030
1031 ✗ static const AVClass *child_class_iterate(void **iter)
1032 {
1033 ✗ switch ((uintptr_t) *iter) {
1034 ✗ case 0:
1035 ✗ *iter = (void*)(uintptr_t) 1;
1036 ✗ return sws_get_class();
1037 ✗ case 1:
1038 ✗ *iter = (void*)(uintptr_t) 2;
1039 ✗ return &ff_framesync_class;
1040 }
1041
1042 ✗ return NULL;
1043 }
1044
1045 24136 static void *child_next(void *obj, void *prev)
1046 {
1047 24136 ScaleContext *s = obj;
1048
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 24136 if (!prev)
1049 12670 return s->sws;
1050
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 11466 if (prev == s->sws)
1051 5733 return &s->fs;
1052 5733 return NULL;
1053 }
1054
1055 #define OFFSET(x) offsetof(ScaleContext, x)
1056 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
1057 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
1058
1059 static const AVOption scale_options[] = {
1060 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1061 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1062 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1063 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
1064 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "" }, .flags = FLAGS },
1065 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
1066 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
1067 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, .flags = FLAGS },
1068 { "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" },
1069 { "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"},
1070 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "color" },
1071 { "bt601", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1072 { "bt470", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1073 { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, 0, 0, FLAGS, .unit = "color" },
1074 { "bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709}, 0, 0, FLAGS, .unit = "color" },
1075 { "fcc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_FCC}, 0, 0, FLAGS, .unit = "color" },
1076 { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE240M}, 0, 0, FLAGS, .unit = "color" },
1077 { "bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, 0, 0, FLAGS, .unit = "color" },
1078 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
1079 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, .unit = "range" },
1080 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
1081 { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, .unit = "range" },
1082 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1083 { "limited", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1084 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1085 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1086 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, FLAGS, .unit = "range" },
1087 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, FLAGS, .unit = "range" },
1088 { "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" },
1089 { "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" },
1090 {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "chroma_loc"},
1091 {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "chroma_loc"},
1092 {"left", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_LEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1093 {"center", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_CENTER}, 0, 0, FLAGS, .unit = "chroma_loc"},
1094 {"topleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOPLEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1095 {"top", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOP}, 0, 0, FLAGS, .unit = "chroma_loc"},
1096 {"bottomleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOMLEFT}, 0, 0, FLAGS, .unit = "chroma_loc"},
1097 {"bottom", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOM}, 0, 0, FLAGS, .unit = "chroma_loc"},
1098 { "in_primaries", "set input primaries", OFFSET(in_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_PRI_NB-1, .flags = FLAGS, .unit = "primaries" },
1099 { "out_primaries", "set output primaries", OFFSET(out_primaries), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_PRI_NB-1, .flags = FLAGS, .unit = "primaries"},
1100 {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "primaries"},
1101 {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT709}, 0, 0, FLAGS, .unit = "primaries"},
1102 {"bt470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470M}, 0, 0, FLAGS, .unit = "primaries"},
1103 {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT470BG}, 0, 0, FLAGS, .unit = "primaries"},
1104 {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE170M}, 0, 0, FLAGS, .unit = "primaries"},
1105 {"smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE240M}, 0, 0, FLAGS, .unit = "primaries"},
1106 {"film", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_FILM}, 0, 0, FLAGS, .unit = "primaries"},
1107 {"bt2020", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_BT2020}, 0, 0, FLAGS, .unit = "primaries"},
1108 {"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE428}, 0, 0, FLAGS, .unit = "primaries"},
1109 {"smpte431", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE431}, 0, 0, FLAGS, .unit = "primaries"},
1110 {"smpte432", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_SMPTE432}, 0, 0, FLAGS, .unit = "primaries"},
1111 {"jedec-p22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_JEDEC_P22}, 0, 0, FLAGS, .unit = "primaries"},
1112 {"ebu3213", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_EBU3213}, 0, 0, FLAGS, .unit = "primaries"},
1113 { "in_transfer", "set output color transfer", OFFSET(in_transfer), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_TRC_NB-1, .flags = FLAGS, .unit = "transfer"},
1114 {"out_transfer", "set output color transfer", OFFSET(out_transfer), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_TRC_NB-1, .flags = FLAGS, .unit = "transfer"},
1115 {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "transfer"},
1116 {"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709}, 0, 0, FLAGS, .unit = "transfer"},
1117 {"bt470m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA22}, 0, 0, FLAGS, .unit = "transfer"},
1118 {"gamma22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA22}, 0, 0, FLAGS, .unit = "transfer"},
1119 {"bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA28}, 0, 0, FLAGS, .unit = "transfer"},
1120 {"gamma28", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_GAMMA28}, 0, 0, FLAGS, .unit = "transfer"},
1121 {"smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE170M}, 0, 0, FLAGS, .unit = "transfer"},
1122 {"smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE240M}, 0, 0, FLAGS, .unit = "transfer"},
1123 {"linear", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_LINEAR}, 0, 0, FLAGS, .unit = "transfer"},
1124 {"iec61966-2-1", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_1}, 0, 0, FLAGS, .unit = "transfer"},
1125 {"srgb", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_1}, 0, 0, FLAGS, .unit = "transfer"},
1126 {"iec61966-2-4", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_4}, 0, 0, FLAGS, .unit = "transfer"},
1127 {"xvycc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_IEC61966_2_4}, 0, 0, FLAGS, .unit = "transfer"},
1128 {"bt1361e", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT1361_ECG}, 0, 0, FLAGS, .unit = "transfer"},
1129 {"bt2020-10", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_10}, 0, 0, FLAGS, .unit = "transfer"},
1130 {"bt2020-12", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_12}, 0, 0, FLAGS, .unit = "transfer"},
1131 {"smpte2084", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084}, 0, 0, FLAGS, .unit = "transfer"},
1132 {"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE428}, 0, 0, FLAGS, .unit = "transfer"},
1133 {"arib-std-b67", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67}, 0, 0, FLAGS, .unit = "transfer"},
1134 { "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 },
1135 { "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 },
1136 { "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 },
1137 { "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 },
1138 { "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, .unit = "force_oar" },
1139 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, .unit = "force_oar" },
1140 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, .unit = "force_oar" },
1141 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, .unit = "force_oar" },
1142 { "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 },
1143 { "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 },
1144 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1145 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1146 { "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" },
1147 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
1148 { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
1149 { NULL }
1150 };
1151
1152 static const AVClass scale_class = {
1153 .class_name = "scale",
1154 .item_name = av_default_item_name,
1155 .option = scale_options,
1156 .version = LIBAVUTIL_VERSION_INT,
1157 .category = AV_CLASS_CATEGORY_FILTER,
1158 .child_class_iterate = child_class_iterate,
1159 .child_next = child_next,
1160 };
1161
1162 static const AVFilterPad avfilter_vf_scale_inputs[] = {
1163 {
1164 .name = "default",
1165 .type = AVMEDIA_TYPE_VIDEO,
1166 },
1167 };
1168
1169 static const AVFilterPad avfilter_vf_scale_outputs[] = {
1170 {
1171 .name = "default",
1172 .type = AVMEDIA_TYPE_VIDEO,
1173 .config_props = config_props,
1174 },
1175 };
1176
1177 const FFFilter ff_vf_scale = {
1178 .p.name = "scale",
1179 .p.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
1180 .p.priv_class = &scale_class,
1181 .p.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
1182 .preinit = preinit,
1183 .init = init,
1184 .uninit = uninit,
1185 .priv_size = sizeof(ScaleContext),
1186 FILTER_INPUTS(avfilter_vf_scale_inputs),
1187 FILTER_OUTPUTS(avfilter_vf_scale_outputs),
1188 FILTER_QUERY_FUNC2(query_formats),
1189 .activate = activate,
1190 .process_command = process_command,
1191 };
1192
1193 ✗ static const AVClass *scale2ref_child_class_iterate(void **iter)
1194 {
1195 ✗ const AVClass *c = *iter ? NULL : sws_get_class();
1196 ✗ *iter = (void*)(uintptr_t)c;
1197 ✗ return c;
1198 }
1199
1200 ✗ static void *scale2ref_child_next(void *obj, void *prev)
1201 {
1202 ✗ ScaleContext *s = obj;
1203 ✗ if (!prev)
1204 ✗ return s->sws;
1205 ✗ return NULL;
1206 }
1207
1208 static const AVClass scale2ref_class = {
1209 .class_name = "scale(2ref)",
1210 .item_name = av_default_item_name,
1211 .option = scale_options,
1212 .version = LIBAVUTIL_VERSION_INT,
1213 .category = AV_CLASS_CATEGORY_FILTER,
1214 .child_class_iterate = scale2ref_child_class_iterate,
1215 .child_next = scale2ref_child_next,
1216 };
1217
1218 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
1219 {
1220 .name = "default",
1221 .type = AVMEDIA_TYPE_VIDEO,
1222 .filter_frame = filter_frame,
1223 },
1224 {
1225 .name = "ref",
1226 .type = AVMEDIA_TYPE_VIDEO,
1227 .filter_frame = filter_frame_ref,
1228 },
1229 };
1230
1231 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
1232 {
1233 .name = "default",
1234 .type = AVMEDIA_TYPE_VIDEO,
1235 .config_props = config_props,
1236 .request_frame= request_frame,
1237 },
1238 {
1239 .name = "ref",
1240 .type = AVMEDIA_TYPE_VIDEO,
1241 .config_props = config_props_ref,
1242 .request_frame= request_frame_ref,
1243 },
1244 };
1245
1246 const FFFilter ff_vf_scale2ref = {
1247 .p.name = "scale2ref",
1248 .p.description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
1249 .p.priv_class = &scale2ref_class,
1250 .preinit = preinit,
1251 .init = init,
1252 .uninit = uninit,
1253 .priv_size = sizeof(ScaleContext),
1254 FILTER_INPUTS(avfilter_vf_scale2ref_inputs),
1255 FILTER_OUTPUTS(avfilter_vf_scale2ref_outputs),
1256 FILTER_QUERY_FUNC2(query_formats),
1257 .process_command = process_command,
1258 };
1259