FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/vf_scale.c
Date: 2023-12-04 05:51:44
Exec Total Coverage
Lines: 350 504 69.4%
Functions: 15 19 78.9%
Branches: 213 434 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 "formats.h"
32 #include "internal.h"
33 #include "scale_eval.h"
34 #include "video.h"
35 #include "libavutil/avstring.h"
36 #include "libavutil/eval.h"
37 #include "libavutil/internal.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/parseutils.h"
41 #include "libavutil/pixdesc.h"
42 #include "libavutil/imgutils.h"
43 #include "libswscale/swscale.h"
44
45 static const char *const var_names[] = {
46 "in_w", "iw",
47 "in_h", "ih",
48 "out_w", "ow",
49 "out_h", "oh",
50 "a",
51 "sar",
52 "dar",
53 "hsub",
54 "vsub",
55 "ohsub",
56 "ovsub",
57 "n",
58 "t",
59 #if FF_API_FRAME_PKT
60 "pos",
61 #endif
62 "main_w",
63 "main_h",
64 "main_a",
65 "main_sar",
66 "main_dar", "mdar",
67 "main_hsub",
68 "main_vsub",
69 "main_n",
70 "main_t",
71 "main_pos",
72 NULL
73 };
74
75 enum var_name {
76 VAR_IN_W, VAR_IW,
77 VAR_IN_H, VAR_IH,
78 VAR_OUT_W, VAR_OW,
79 VAR_OUT_H, VAR_OH,
80 VAR_A,
81 VAR_SAR,
82 VAR_DAR,
83 VAR_HSUB,
84 VAR_VSUB,
85 VAR_OHSUB,
86 VAR_OVSUB,
87 VAR_N,
88 VAR_T,
89 #if FF_API_FRAME_PKT
90 VAR_POS,
91 #endif
92 VAR_S2R_MAIN_W,
93 VAR_S2R_MAIN_H,
94 VAR_S2R_MAIN_A,
95 VAR_S2R_MAIN_SAR,
96 VAR_S2R_MAIN_DAR, VAR_S2R_MDAR,
97 VAR_S2R_MAIN_HSUB,
98 VAR_S2R_MAIN_VSUB,
99 VAR_S2R_MAIN_N,
100 VAR_S2R_MAIN_T,
101 VAR_S2R_MAIN_POS,
102 VARS_NB
103 };
104
105 enum EvalMode {
106 EVAL_MODE_INIT,
107 EVAL_MODE_FRAME,
108 EVAL_MODE_NB
109 };
110
111 typedef struct ScaleContext {
112 const AVClass *class;
113 struct SwsContext *sws; ///< software scaler context
114 struct SwsContext *isws[2]; ///< software scaler context for interlaced material
115 // context used for forwarding options to sws
116 struct SwsContext *sws_opts;
117
118 /**
119 * New dimensions. Special values are:
120 * 0 = original width/height
121 * -1 = keep original aspect
122 * -N = try to keep aspect but make sure it is divisible by N
123 */
124 int w, h;
125 char *size_str;
126 double param[2]; // sws params
127
128 int hsub, vsub; ///< chroma subsampling
129 int slice_y; ///< top of current output slice
130 int input_is_pal; ///< set to 1 if the input format is paletted
131 int output_is_pal; ///< set to 1 if the output format is paletted
132 int interlaced;
133
134 char *w_expr; ///< width expression string
135 char *h_expr; ///< height expression string
136 AVExpr *w_pexpr;
137 AVExpr *h_pexpr;
138 double var_values[VARS_NB];
139
140 char *flags_str;
141
142 int in_color_matrix;
143 int out_color_matrix;
144
145 int in_range;
146 int in_frame_range;
147 int out_range;
148
149 int out_h_chr_pos;
150 int out_v_chr_pos;
151 int in_h_chr_pos;
152 int in_v_chr_pos;
153
154 int force_original_aspect_ratio;
155 int force_divisible_by;
156
157 int eval_mode; ///< expression evaluation mode
158
159 } ScaleContext;
160
161 const AVFilter ff_vf_scale2ref;
162
163 static int config_props(AVFilterLink *outlink);
164
165 19378 static int check_exprs(AVFilterContext *ctx)
166 {
167 19378 ScaleContext *scale = ctx->priv;
168 19378 unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
169
170
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 19378 if (!scale->w_pexpr && !scale->h_pexpr)
171 ✗ return AVERROR(EINVAL);
172
173
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 19378 if (scale->w_pexpr)
174 19378 av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
175
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 19378 if (scale->h_pexpr)
176 12646 av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
177
178
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 19378 if (vars_w[VAR_OUT_W] || vars_w[VAR_OW]) {
179 ✗ av_log(ctx, AV_LOG_ERROR, "Width expression cannot be self-referencing: '%s'.\n", scale->w_expr);
180 ✗ return AVERROR(EINVAL);
181 }
182
183
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 19378 if (vars_h[VAR_OUT_H] || vars_h[VAR_OH]) {
184 ✗ av_log(ctx, AV_LOG_ERROR, "Height expression cannot be self-referencing: '%s'.\n", scale->h_expr);
185 ✗ return AVERROR(EINVAL);
186 }
187
188
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 19378 if ((vars_w[VAR_OUT_H] || vars_w[VAR_OH]) &&
189 ✗ (vars_h[VAR_OUT_W] || vars_h[VAR_OW])) {
190 ✗ av_log(ctx, AV_LOG_WARNING, "Circular references detected for width '%s' and height '%s' - possibly invalid.\n", scale->w_expr, scale->h_expr);
191 }
192
193
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 19378 if (ctx->filter != &ff_vf_scale2ref &&
194
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 19374 (vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] ||
195
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 19374 vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] ||
196
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 19374 vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] ||
197
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 19374 vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] ||
198
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 19374 vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] ||
199
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 19374 vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] ||
200
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 19374 vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] ||
201
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 19374 vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] ||
202
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 19374 vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
203
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 19374 vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
204
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 19374 vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
205 ✗ av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n");
206 ✗ return AVERROR(EINVAL);
207 }
208
209
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 19378 if (scale->eval_mode == EVAL_MODE_INIT &&
210
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 19378 (vars_w[VAR_N] || vars_h[VAR_N] ||
211
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 19378 vars_w[VAR_T] || vars_h[VAR_T] ||
212 #if FF_API_FRAME_PKT
213
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 19378 vars_w[VAR_POS] || vars_h[VAR_POS] ||
214 #endif
215
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 19378 vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] ||
216
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 19378 vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] ||
217
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 19378 vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) {
218 ✗ av_log(ctx, AV_LOG_ERROR, "Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode.\n");
219 ✗ return AVERROR(EINVAL);
220 }
221
222 19378 return 0;
223 }
224
225 19378 static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args)
226 {
227 19378 ScaleContext *scale = ctx->priv;
228 19378 int ret, is_inited = 0;
229 19378 char *old_str_expr = NULL;
230 19378 AVExpr *old_pexpr = NULL;
231
232
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 19378 if (str_expr) {
233 ✗ old_str_expr = av_strdup(str_expr);
234 ✗ if (!old_str_expr)
235 ✗ return AVERROR(ENOMEM);
236 ✗ av_opt_set(scale, var, args, 0);
237 }
238
239
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 19378 if (*pexpr_ptr) {
240 5914 old_pexpr = *pexpr_ptr;
241 5914 *pexpr_ptr = NULL;
242 5914 is_inited = 1;
243 }
244
245 19378 ret = av_expr_parse(pexpr_ptr, args, var_names,
246 NULL, NULL, NULL, NULL, 0, ctx);
247
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 19378 if (ret < 0) {
248 ✗ av_log(ctx, AV_LOG_ERROR, "Cannot parse expression for %s: '%s'\n", var, args);
249 ✗ goto revert;
250 }
251
252 19378 ret = check_exprs(ctx);
253
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 19378 if (ret < 0)
254 ✗ goto revert;
255
256
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 19378 if (is_inited && (ret = config_props(ctx->outputs[0])) < 0)
257 ✗ goto revert;
258
259 19378 av_expr_free(old_pexpr);
260 19378 old_pexpr = NULL;
261 19378 av_freep(&old_str_expr);
262
263 19378 return 0;
264
265 ✗ revert:
266 ✗ av_expr_free(*pexpr_ptr);
267 ✗ *pexpr_ptr = NULL;
268 ✗ if (old_str_expr) {
269 ✗ av_opt_set(scale, var, old_str_expr, 0);
270 ✗ av_free(old_str_expr);
271 }
272 ✗ if (old_pexpr)
273 ✗ *pexpr_ptr = old_pexpr;
274
275 ✗ return ret;
276 }
277
278 6732 static av_cold int preinit(AVFilterContext *ctx)
279 {
280 6732 ScaleContext *scale = ctx->priv;
281 int ret;
282
283 6732 scale->sws_opts = sws_alloc_context();
284
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 6732 if (!scale->sws_opts)
285 ✗ return AVERROR(ENOMEM);
286
287 // set threads=0, so we can later check whether the user modified it
288 6732 ret = av_opt_set_int(scale->sws_opts, "threads", 0, 0);
289
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 6732 if (ret < 0)
290 ✗ return ret;
291
292 6732 return 0;
293 }
294
295 6732 static av_cold int init(AVFilterContext *ctx)
296 {
297 6732 ScaleContext *scale = ctx->priv;
298 int64_t threads;
299 int ret;
300
301
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 6732 if (scale->size_str && (scale->w_expr || scale->h_expr)) {
302 ✗ av_log(ctx, AV_LOG_ERROR,
303 "Size and width/height expressions cannot be set at the same time.\n");
304 ✗ return AVERROR(EINVAL);
305 }
306
307
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 6732 if (scale->w_expr && !scale->h_expr)
308 ✗ FFSWAP(char *, scale->w_expr, scale->size_str);
309
310
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 6732 if (scale->size_str) {
311 char buf[32];
312 ✗ if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
313 ✗ av_log(ctx, AV_LOG_ERROR,
314 "Invalid size '%s'\n", scale->size_str);
315 ✗ return ret;
316 }
317 ✗ snprintf(buf, sizeof(buf)-1, "%d", scale->w);
318 ✗ av_opt_set(scale, "w", buf, 0);
319 ✗ snprintf(buf, sizeof(buf)-1, "%d", scale->h);
320 ✗ av_opt_set(scale, "h", buf, 0);
321 }
322
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 6732 if (!scale->w_expr)
323 6028 av_opt_set(scale, "w", "iw", 0);
324
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 6732 if (!scale->h_expr)
325 6028 av_opt_set(scale, "h", "ih", 0);
326
327 6732 ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
328
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 6732 if (ret < 0)
329 ✗ return ret;
330
331 6732 ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
332
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 6732 if (ret < 0)
333 ✗ return ret;
334
335 6732 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
336 6732 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
337
338
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 6732 if (scale->flags_str && *scale->flags_str) {
339 58 ret = av_opt_set(scale->sws_opts, "sws_flags", scale->flags_str, 0);
340
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 58 if (ret < 0)
341 ✗ return ret;
342 }
343
344
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 20196 for (int i = 0; i < FF_ARRAY_ELEMS(scale->param); i++)
345
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 13464 if (scale->param[i] != DBL_MAX) {
346 ✗ ret = av_opt_set_double(scale->sws_opts, i ? "param1" : "param0",
347 scale->param[i], 0);
348 ✗ if (ret < 0)
349 ✗ return ret;
350 }
351
352 // use generic thread-count if the user did not set it explicitly
353 6732 ret = av_opt_get_int(scale->sws_opts, "threads", 0, &threads);
354
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 6732 if (ret < 0)
355 ✗ return ret;
356
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 6732 if (!threads)
357 6732 av_opt_set_int(scale->sws_opts, "threads", ff_filter_get_nb_threads(ctx), 0);
358
359 6732 scale->in_frame_range = AVCOL_RANGE_UNSPECIFIED;
360
361 6732 return 0;
362 }
363
364 6732 static av_cold void uninit(AVFilterContext *ctx)
365 {
366 6732 ScaleContext *scale = ctx->priv;
367 6732 av_expr_free(scale->w_pexpr);
368 6732 av_expr_free(scale->h_pexpr);
369 6732 scale->w_pexpr = scale->h_pexpr = NULL;
370 6732 sws_freeContext(scale->sws_opts);
371 6732 sws_freeContext(scale->sws);
372 6732 sws_freeContext(scale->isws[0]);
373 6732 sws_freeContext(scale->isws[1]);
374 6732 scale->sws = NULL;
375 6732 }
376
377 3834 static int query_formats(AVFilterContext *ctx)
378 {
379 AVFilterFormats *formats;
380 const AVPixFmtDescriptor *desc;
381 enum AVPixelFormat pix_fmt;
382 int ret;
383
384 3834 desc = NULL;
385 3834 formats = NULL;
386
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 877986 while ((desc = av_pix_fmt_desc_next(desc))) {
387 874152 pix_fmt = av_pix_fmt_desc_get_id(desc);
388
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 989172 if ((sws_isSupportedInput(pix_fmt) ||
389 115020 sws_isSupportedEndiannessConversion(pix_fmt))
390
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 759132 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
391 ✗ return ret;
392 }
393 }
394
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 3834 if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->outcfg.formats)) < 0)
395 ✗ return ret;
396
397 3834 desc = NULL;
398 3834 formats = NULL;
399
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 877986 while ((desc = av_pix_fmt_desc_next(desc))) {
400 874152 pix_fmt = av_pix_fmt_desc_get_id(desc);
401
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 1035180 if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
402 161028 sws_isSupportedEndiannessConversion(pix_fmt))
403
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 713124 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
404 ✗ return ret;
405 }
406 }
407
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 3834 if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->incfg.formats)) < 0)
408 ✗ return ret;
409
410 3834 return 0;
411 }
412
413 12660 static int scale_eval_dimensions(AVFilterContext *ctx)
414 {
415 12660 ScaleContext *scale = ctx->priv;
416 12660 const char scale2ref = ctx->filter == &ff_vf_scale2ref;
417
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 12660 const AVFilterLink *inlink = scale2ref ? ctx->inputs[1] : ctx->inputs[0];
418 12660 const AVFilterLink *outlink = ctx->outputs[0];
419 12660 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
420 12660 const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
421 char *expr;
422 int eval_w, eval_h;
423 int ret;
424 double res;
425 const AVPixFmtDescriptor *main_desc;
426 const AVFilterLink *main_link;
427
428
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 12660 if (scale2ref) {
429 1 main_link = ctx->inputs[0];
430 1 main_desc = av_pix_fmt_desc_get(main_link->format);
431 }
432
433 12660 scale->var_values[VAR_IN_W] = scale->var_values[VAR_IW] = inlink->w;
434 12660 scale->var_values[VAR_IN_H] = scale->var_values[VAR_IH] = inlink->h;
435 12660 scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = NAN;
436 12660 scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = NAN;
437 12660 scale->var_values[VAR_A] = (double) inlink->w / inlink->h;
438 25320 scale->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
439
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 12660 (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
440 12660 scale->var_values[VAR_DAR] = scale->var_values[VAR_A] * scale->var_values[VAR_SAR];
441 12660 scale->var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
442 12660 scale->var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
443 12660 scale->var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
444 12660 scale->var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
445
446
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 12660 if (scale2ref) {
447 1 scale->var_values[VAR_S2R_MAIN_W] = main_link->w;
448 1 scale->var_values[VAR_S2R_MAIN_H] = main_link->h;
449 1 scale->var_values[VAR_S2R_MAIN_A] = (double) main_link->w / main_link->h;
450 2 scale->var_values[VAR_S2R_MAIN_SAR] = main_link->sample_aspect_ratio.num ?
451
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 1 (double) main_link->sample_aspect_ratio.num / main_link->sample_aspect_ratio.den : 1;
452 1 scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] =
453 1 scale->var_values[VAR_S2R_MAIN_A] * scale->var_values[VAR_S2R_MAIN_SAR];
454 1 scale->var_values[VAR_S2R_MAIN_HSUB] = 1 << main_desc->log2_chroma_w;
455 1 scale->var_values[VAR_S2R_MAIN_VSUB] = 1 << main_desc->log2_chroma_h;
456 }
457
458 12660 res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
459
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 12660 eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
460
461 12660 res = av_expr_eval(scale->h_pexpr, scale->var_values, NULL);
462
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 12660 if (isnan(res)) {
463 ✗ expr = scale->h_expr;
464 ✗ ret = AVERROR(EINVAL);
465 ✗ goto fail;
466 }
467
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 12660 eval_h = scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = (int) res == 0 ? inlink->h : (int) res;
468
469 12660 res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL);
470
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 12660 if (isnan(res)) {
471 ✗ expr = scale->w_expr;
472 ✗ ret = AVERROR(EINVAL);
473 ✗ goto fail;
474 }
475
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 12660 eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res;
476
477 12660 scale->w = eval_w;
478 12660 scale->h = eval_h;
479
480 12660 return 0;
481
482 ✗ fail:
483 ✗ av_log(ctx, AV_LOG_ERROR,
484 "Error when evaluating the expression '%s'.\n", expr);
485 ✗ return ret;
486 }
487
488 12660 static int config_props(AVFilterLink *outlink)
489 {
490 12660 AVFilterContext *ctx = outlink->src;
491 12660 AVFilterLink *inlink0 = outlink->src->inputs[0];
492 25320 AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
493
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 12660 outlink->src->inputs[1] :
494 12659 outlink->src->inputs[0];
495 12660 enum AVPixelFormat outfmt = outlink->format;
496 12660 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
497 12660 const AVPixFmtDescriptor *outdesc = av_pix_fmt_desc_get(outfmt);
498 12660 ScaleContext *scale = ctx->priv;
499 12660 uint8_t *flags_val = NULL;
500 int ret;
501
502
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 12660 if ((ret = scale_eval_dimensions(ctx)) < 0)
503 ✗ goto fail;
504
505 12660 outlink->w = scale->w;
506 12660 outlink->h = scale->h;
507
508 12660 ff_scale_adjust_dimensions(inlink, &outlink->w, &outlink->h,
509 scale->force_original_aspect_ratio,
510 scale->force_divisible_by);
511
512 if (outlink->w > INT_MAX ||
513 outlink->h > INT_MAX ||
514 (outlink->h * inlink->w) > INT_MAX ||
515 (outlink->w * inlink->h) > INT_MAX)
516 av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
517
518 /* TODO: make algorithm configurable */
519
520 12660 scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL;
521
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 12660 if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
522 12660 scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL;
523
524
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 12660 if (scale->sws)
525 8577 sws_freeContext(scale->sws);
526
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 12660 if (scale->isws[0])
527 ✗ sws_freeContext(scale->isws[0]);
528
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 12660 if (scale->isws[1])
529 ✗ sws_freeContext(scale->isws[1]);
530 12660 scale->isws[0] = scale->isws[1] = scale->sws = NULL;
531
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 12660 if (inlink0->w == outlink->w &&
532
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 11471 inlink0->h == outlink->h &&
533
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 11431 scale->out_color_matrix == AVCOL_SPC_UNSPECIFIED &&
534
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 11429 scale->in_range == scale->out_range &&
535
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 11429 inlink0->format == outlink->format)
536 ;
537 else {
538 12214 struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
539 int i;
540
541
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 12214 for (i = 0; i < 3; i++) {
542 12214 int in_v_chr_pos = scale->in_v_chr_pos, out_v_chr_pos = scale->out_v_chr_pos;
543 12214 struct SwsContext *const s = sws_alloc_context();
544
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 12214 if (!s)
545 ✗ return AVERROR(ENOMEM);
546 12214 *swscs[i] = s;
547
548 12214 ret = av_opt_copy(s, scale->sws_opts);
549
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 12214 if (ret < 0)
550 ✗ return ret;
551
552 12214 av_opt_set_int(s, "srcw", inlink0 ->w, 0);
553 12214 av_opt_set_int(s, "srch", inlink0 ->h >> !!i, 0);
554 12214 av_opt_set_int(s, "src_format", inlink0->format, 0);
555 12214 av_opt_set_int(s, "dstw", outlink->w, 0);
556 12214 av_opt_set_int(s, "dsth", outlink->h >> !!i, 0);
557 12214 av_opt_set_int(s, "dst_format", outfmt, 0);
558
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 12214 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
559 2 av_opt_set_int(s, "src_range",
560 2 scale->in_range == AVCOL_RANGE_JPEG, 0);
561
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 12212 else if (scale->in_frame_range != AVCOL_RANGE_UNSPECIFIED)
562 8578 av_opt_set_int(s, "src_range",
563 8578 scale->in_frame_range == AVCOL_RANGE_JPEG, 0);
564
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 12214 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
565 2 av_opt_set_int(s, "dst_range",
566 2 scale->out_range == AVCOL_RANGE_JPEG, 0);
567
568 /* Override chroma location default settings to have the correct
569 * chroma positions. MPEG chroma positions are used by convention.
570 * Note that this works for both MPEG-1/JPEG and MPEG-2/4 chroma
571 * locations, since they share a vertical alignment */
572
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 12214 if (desc->log2_chroma_h == 1 && scale->in_v_chr_pos == -513) {
573
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 10596 in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
574 }
575
576
4/4
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 12214 if (outdesc->log2_chroma_h == 1 && scale->out_v_chr_pos == -513) {
577
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 2755 out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
578 }
579
580 12214 av_opt_set_int(s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
581 12214 av_opt_set_int(s, "src_v_chr_pos", in_v_chr_pos, 0);
582 12214 av_opt_set_int(s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
583 12214 av_opt_set_int(s, "dst_v_chr_pos", out_v_chr_pos, 0);
584
585
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 12214 if ((ret = sws_init_context(s, NULL, NULL)) < 0)
586 ✗ return ret;
587
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 12214 if (!scale->interlaced)
588 12214 break;
589 }
590 }
591
592
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 12660 if (inlink0->sample_aspect_ratio.num){
593 596 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
594 } else
595 12064 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
596
597
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 12660 if (scale->sws)
598 12214 av_opt_get(scale->sws, "sws_flags", 0, &flags_val);
599
600 12660 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:%s\n",
601 12660 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
602 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
603 12660 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
604 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
605 flags_val);
606 12660 av_freep(&flags_val);
607
608 12660 return 0;
609
610 ✗ fail:
611 ✗ return ret;
612 }
613
614 1 static int config_props_ref(AVFilterLink *outlink)
615 {
616 1 AVFilterLink *inlink = outlink->src->inputs[1];
617
618 1 outlink->w = inlink->w;
619 1 outlink->h = inlink->h;
620 1 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
621 1 outlink->time_base = inlink->time_base;
622 1 outlink->frame_rate = inlink->frame_rate;
623
624 1 return 0;
625 }
626
627 5 static int request_frame(AVFilterLink *outlink)
628 {
629 5 return ff_request_frame(outlink->src->inputs[0]);
630 }
631
632 5 static int request_frame_ref(AVFilterLink *outlink)
633 {
634 5 return ff_request_frame(outlink->src->inputs[1]);
635 }
636
637 ✗ static void frame_offset(AVFrame *frame, int dir, int is_pal)
638 {
639 ✗ for (int i = 0; i < 4 && frame->data[i]; i++) {
640 ✗ if (i == 1 && is_pal)
641 ✗ break;
642 ✗ frame->data[i] += frame->linesize[i] * dir;
643 }
644 ✗ }
645
646 ✗ static int scale_field(ScaleContext *scale, AVFrame *dst, AVFrame *src,
647 int field)
648 {
649 ✗ int orig_h_src = src->height;
650 ✗ int orig_h_dst = dst->height;
651 int ret;
652
653 // offset the data pointers for the bottom field
654 ✗ if (field) {
655 ✗ frame_offset(src, 1, scale->input_is_pal);
656 ✗ frame_offset(dst, 1, scale->output_is_pal);
657 }
658
659 // take every second line
660 ✗ for (int i = 0; i < 4; i++) {
661 ✗ src->linesize[i] *= 2;
662 ✗ dst->linesize[i] *= 2;
663 }
664 ✗ src->height /= 2;
665 ✗ dst->height /= 2;
666
667 ✗ ret = sws_scale_frame(scale->isws[field], dst, src);
668 ✗ if (ret < 0)
669 ✗ return ret;
670
671 // undo the changes we made above
672 ✗ for (int i = 0; i < 4; i++) {
673 ✗ src->linesize[i] /= 2;
674 ✗ dst->linesize[i] /= 2;
675 }
676 ✗ src->height = orig_h_src;
677 ✗ dst->height = orig_h_dst;
678
679 ✗ if (field) {
680 ✗ frame_offset(src, -1, scale->input_is_pal);
681 ✗ frame_offset(dst, -1, scale->output_is_pal);
682 }
683
684 ✗ return 0;
685 }
686
687 45731 static int scale_frame(AVFilterLink *link, AVFrame *in, AVFrame **frame_out)
688 {
689 45731 AVFilterContext *ctx = link->dst;
690 45731 ScaleContext *scale = ctx->priv;
691 45731 AVFilterLink *outlink = ctx->outputs[0];
692 AVFrame *out;
693 45731 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
694 char buf[32];
695 int ret;
696 int in_range;
697 int frame_changed;
698
699 45731 *frame_out = NULL;
700
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 45731 if (in->colorspace == AVCOL_SPC_YCGCO)
701 ✗ av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
702
703 137192 frame_changed = in->width != link->w ||
704
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 45730 in->height != link->h ||
705
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 45730 in->format != link->format ||
706
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✗ Branch 3 not taken.
 137191 in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
707
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 45730 in->sample_aspect_ratio.num != link->sample_aspect_ratio.num;
708
709
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 45731 if (in->color_range != AVCOL_RANGE_UNSPECIFIED &&
710
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✗ Branch 1 not taken.
 13148 scale->in_range == AVCOL_RANGE_UNSPECIFIED &&
711
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 13148 in->color_range != scale->in_frame_range) {
712 2956 scale->in_frame_range = in->color_range;
713 2956 frame_changed = 1;
714 }
715
716
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 45731 if (scale->eval_mode == EVAL_MODE_FRAME || frame_changed) {
717 2957 unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 };
718
719 2957 av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB);
720 2957 av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB);
721
722
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 2957 if (scale->eval_mode == EVAL_MODE_FRAME &&
723 ✗ !frame_changed &&
724 ✗ ctx->filter != &ff_vf_scale2ref &&
725 ✗ !(vars_w[VAR_N] || vars_w[VAR_T]
726 #if FF_API_FRAME_PKT
727 ✗ || vars_w[VAR_POS]
728 #endif
729 ✗ ) &&
730 ✗ !(vars_h[VAR_N] || vars_h[VAR_T]
731 #if FF_API_FRAME_PKT
732 ✗ || vars_h[VAR_POS]
733 #endif
734 ✗ ) &&
735 ✗ scale->w && scale->h)
736 ✗ goto scale;
737
738
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✗ Branch 1 not taken.
 2957 if (scale->eval_mode == EVAL_MODE_INIT) {
739 2957 snprintf(buf, sizeof(buf) - 1, "%d", scale->w);
740 2957 av_opt_set(scale, "w", buf, 0);
741 2957 snprintf(buf, sizeof(buf) - 1, "%d", scale->h);
742 2957 av_opt_set(scale, "h", buf, 0);
743
744 2957 ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr);
745
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 2957 if (ret < 0)
746 ✗ return ret;
747
748 2957 ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr);
749
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 2957 if (ret < 0)
750 ✗ return ret;
751 }
752
753
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 2957 if (ctx->filter == &ff_vf_scale2ref) {
754 ✗ scale->var_values[VAR_S2R_MAIN_N] = link->frame_count_out;
755 ✗ scale->var_values[VAR_S2R_MAIN_T] = TS2T(in->pts, link->time_base);
756 #if FF_API_FRAME_PKT
757 FF_DISABLE_DEPRECATION_WARNINGS
758 ✗ scale->var_values[VAR_S2R_MAIN_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
759 FF_ENABLE_DEPRECATION_WARNINGS
760 #endif
761 } else {
762 2957 scale->var_values[VAR_N] = link->frame_count_out;
763
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 2957 scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
764 #if FF_API_FRAME_PKT
765 FF_DISABLE_DEPRECATION_WARNINGS
766
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 2957 scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
767 FF_ENABLE_DEPRECATION_WARNINGS
768 #endif
769 }
770
771 2957 link->dst->inputs[0]->format = in->format;
772 2957 link->dst->inputs[0]->w = in->width;
773 2957 link->dst->inputs[0]->h = in->height;
774
775 2957 link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
776 2957 link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
777
778
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 2957 if ((ret = config_props(outlink)) < 0)
779 ✗ return ret;
780 }
781
782 42774 scale:
783
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 45731 if (!scale->sws) {
784 3364 *frame_out = in;
785 3364 return 0;
786 }
787
788 42367 scale->hsub = desc->log2_chroma_w;
789 42367 scale->vsub = desc->log2_chroma_h;
790
791 42367 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
792
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 42367 if (!out) {
793 ✗ av_frame_free(&in);
794 ✗ return AVERROR(ENOMEM);
795 }
796 42367 *frame_out = out;
797
798 42367 av_frame_copy_props(out, in);
799 42367 out->width = outlink->w;
800 42367 out->height = outlink->h;
801
802
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 42367 if (scale->output_is_pal)
803 ✗ avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
804
805 42367 in_range = in->color_range;
806
807
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 42367 if ( scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED
808 ✗ || scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED
809 ✗ || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
810 ✗ || in_range != AVCOL_RANGE_UNSPECIFIED
811 ✗ || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
812 int in_full, out_full, brightness, contrast, saturation;
813 const int *inv_table, *table;
814
815 42367 sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
816 (int **)&table, &out_full,
817 &brightness, &contrast, &saturation);
818
819
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 42367 if (scale->in_color_matrix == -1 /* auto */)
820 42365 inv_table = sws_getCoefficients(in->colorspace);
821
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 2 else if (scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED)
822 2 inv_table = sws_getCoefficients(scale->in_color_matrix);
823
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 42367 if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED)
824 2 table = sws_getCoefficients(scale->out_color_matrix);
825
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 42365 else if (scale->in_color_matrix != AVCOL_SPC_UNSPECIFIED)
826 42365 table = inv_table;
827
828
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 42367 if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
829 2 in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
830
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 42365 else if (in_range != AVCOL_RANGE_UNSPECIFIED)
831 11355 in_full = (in_range == AVCOL_RANGE_JPEG);
832
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 42367 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
833 2 out_full = (scale->out_range == AVCOL_RANGE_JPEG);
834
835 42367 sws_setColorspaceDetails(scale->sws, inv_table, in_full,
836 table, out_full,
837 brightness, contrast, saturation);
838
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 42367 if (scale->isws[0])
839 ✗ sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
840 table, out_full,
841 brightness, contrast, saturation);
842
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 42367 if (scale->isws[1])
843 ✗ sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
844 table, out_full,
845 brightness, contrast, saturation);
846
847
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 42367 out->color_range = out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
848
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 42367 if (scale->out_color_matrix != AVCOL_SPC_UNSPECIFIED)
849 2 out->colorspace = scale->out_color_matrix;
850 }
851
852 // Sanity checks:
853 // 1. If the output is RGB, set the matrix coefficients to RGB.
854 // 2. If the output is not RGB and we've got the RGB/XYZ (identity)
855 // matrix configured, unset the matrix.
856 // In theory these should be in swscale itself as the AVFrame
857 // based API gets in, so that not every swscale API user has
858 // to go through duplicating such sanity checks.
859
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 42367 if (av_pix_fmt_desc_get(out->format)->flags & AV_PIX_FMT_FLAG_RGB)
860 13583 out->colorspace = AVCOL_SPC_RGB;
861
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 28784 else if (out->colorspace == AVCOL_SPC_RGB)
862 258 out->colorspace = AVCOL_SPC_UNSPECIFIED;
863
864 42367 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
865 42367 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
866 42367 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
867 INT_MAX);
868
869
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 42367 if (scale->interlaced>0 || (scale->interlaced<0 &&
870 ✗ (in->flags & AV_FRAME_FLAG_INTERLACED))) {
871 ✗ ret = scale_field(scale, out, in, 0);
872 ✗ if (ret >= 0)
873 ✗ ret = scale_field(scale, out, in, 1);
874 } else {
875 42367 ret = sws_scale_frame(scale->sws, out, in);
876 }
877
878 42367 av_frame_free(&in);
879
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 42367 if (ret < 0)
880 ✗ av_frame_free(frame_out);
881 42367 return ret;
882 }
883
884 45731 static int filter_frame(AVFilterLink *link, AVFrame *in)
885 {
886 45731 AVFilterContext *ctx = link->dst;
887 45731 AVFilterLink *outlink = ctx->outputs[0];
888 AVFrame *out;
889 int ret;
890
891 45731 ret = scale_frame(link, in, &out);
892
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 45731 if (out)
893 45731 return ff_filter_frame(outlink, out);
894
895 ✗ return ret;
896 }
897
898 5 static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
899 {
900 5 ScaleContext *scale = link->dst->priv;
901 5 AVFilterLink *outlink = link->dst->outputs[1];
902 int frame_changed;
903
904 15 frame_changed = in->width != link->w ||
905
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 5 in->height != link->h ||
906
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 5 in->format != link->format ||
907
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 15 in->sample_aspect_ratio.den != link->sample_aspect_ratio.den ||
908
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 5 in->sample_aspect_ratio.num != link->sample_aspect_ratio.num;
909
910
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 5 if (frame_changed) {
911 ✗ link->format = in->format;
912 ✗ link->w = in->width;
913 ✗ link->h = in->height;
914 ✗ link->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
915 ✗ link->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
916
917 ✗ config_props_ref(outlink);
918 }
919
920
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 5 if (scale->eval_mode == EVAL_MODE_FRAME) {
921 ✗ scale->var_values[VAR_N] = link->frame_count_out;
922 ✗ scale->var_values[VAR_T] = TS2T(in->pts, link->time_base);
923 #if FF_API_FRAME_PKT
924 FF_DISABLE_DEPRECATION_WARNINGS
925 ✗ scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos;
926 FF_ENABLE_DEPRECATION_WARNINGS
927 #endif
928 }
929
930 5 return ff_filter_frame(outlink, in);
931 }
932
933 ✗ static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
934 char *res, int res_len, int flags)
935 {
936 ✗ ScaleContext *scale = ctx->priv;
937 char *str_expr;
938 AVExpr **pexpr_ptr;
939 int ret, w, h;
940
941 ✗ w = !strcmp(cmd, "width") || !strcmp(cmd, "w");
942 ✗ h = !strcmp(cmd, "height") || !strcmp(cmd, "h");
943
944 ✗ if (w || h) {
945 ✗ str_expr = w ? scale->w_expr : scale->h_expr;
946 ✗ pexpr_ptr = w ? &scale->w_pexpr : &scale->h_pexpr;
947
948 ✗ ret = scale_parse_expr(ctx, str_expr, pexpr_ptr, cmd, args);
949 } else
950 ✗ ret = AVERROR(ENOSYS);
951
952 ✗ if (ret < 0)
953 ✗ av_log(ctx, AV_LOG_ERROR, "Failed to process command. Continuing with existing parameters.\n");
954
955 ✗ return ret;
956 }
957
958 ✗ static const AVClass *child_class_iterate(void **iter)
959 {
960 ✗ const AVClass *c = *iter ? NULL : sws_get_class();
961 ✗ *iter = (void*)(uintptr_t)c;
962 ✗ return c;
963 }
964
965 6408 static void *child_next(void *obj, void *prev)
966 {
967 6408 ScaleContext *s = obj;
968
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 6408 if (!prev)
969 4921 return s->sws_opts;
970 1487 return NULL;
971 }
972
973 #define OFFSET(x) offsetof(ScaleContext, x)
974 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
975 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
976
977 static const AVOption scale_options[] = {
978 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
979 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
980 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
981 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS },
982 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "" }, .flags = FLAGS },
983 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
984 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
985 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
986 { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, AVCOL_SPC_NB-1, .flags = FLAGS, "color" },
987 { "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, "color"},
988 { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, FLAGS, "color" },
989 { "bt601", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, "color" },
990 { "bt470", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, "color" },
991 { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT470BG }, 0, 0, FLAGS, "color" },
992 { "bt709", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT709 }, 0, 0, FLAGS, "color" },
993 { "fcc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_FCC }, 0, 0, FLAGS, "color" },
994 { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_SMPTE240M }, 0, 0, FLAGS, "color" },
995 { "bt2020", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVCOL_SPC_BT2020_NCL }, 0, 0, FLAGS, "color" },
996 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
997 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
998 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
999 { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
1000 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
1001 { "limited",NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
1002 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
1003 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
1004 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
1005 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
1006 { "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 },
1007 { "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 },
1008 { "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 },
1009 { "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 },
1010 { "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, "force_oar" },
1011 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
1012 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
1013 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
1014 { "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 },
1015 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1016 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = DBL_MAX }, -DBL_MAX, DBL_MAX, FLAGS },
1017 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
1018 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
1019 { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
1020 { NULL }
1021 };
1022
1023 static const AVClass scale_class = {
1024 .class_name = "scale(2ref)",
1025 .item_name = av_default_item_name,
1026 .option = scale_options,
1027 .version = LIBAVUTIL_VERSION_INT,
1028 .category = AV_CLASS_CATEGORY_FILTER,
1029 .child_class_iterate = child_class_iterate,
1030 .child_next = child_next,
1031 };
1032
1033 static const AVFilterPad avfilter_vf_scale_inputs[] = {
1034 {
1035 .name = "default",
1036 .type = AVMEDIA_TYPE_VIDEO,
1037 .filter_frame = filter_frame,
1038 },
1039 };
1040
1041 static const AVFilterPad avfilter_vf_scale_outputs[] = {
1042 {
1043 .name = "default",
1044 .type = AVMEDIA_TYPE_VIDEO,
1045 .config_props = config_props,
1046 },
1047 };
1048
1049 const AVFilter ff_vf_scale = {
1050 .name = "scale",
1051 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
1052 .preinit = preinit,
1053 .init = init,
1054 .uninit = uninit,
1055 .priv_size = sizeof(ScaleContext),
1056 .priv_class = &scale_class,
1057 FILTER_INPUTS(avfilter_vf_scale_inputs),
1058 FILTER_OUTPUTS(avfilter_vf_scale_outputs),
1059 FILTER_QUERY_FUNC(query_formats),
1060 .process_command = process_command,
1061 };
1062
1063 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
1064 {
1065 .name = "default",
1066 .type = AVMEDIA_TYPE_VIDEO,
1067 .filter_frame = filter_frame,
1068 },
1069 {
1070 .name = "ref",
1071 .type = AVMEDIA_TYPE_VIDEO,
1072 .filter_frame = filter_frame_ref,
1073 },
1074 };
1075
1076 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
1077 {
1078 .name = "default",
1079 .type = AVMEDIA_TYPE_VIDEO,
1080 .config_props = config_props,
1081 .request_frame= request_frame,
1082 },
1083 {
1084 .name = "ref",
1085 .type = AVMEDIA_TYPE_VIDEO,
1086 .config_props = config_props_ref,
1087 .request_frame= request_frame_ref,
1088 },
1089 };
1090
1091 const AVFilter ff_vf_scale2ref = {
1092 .name = "scale2ref",
1093 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
1094 .preinit = preinit,
1095 .init = init,
1096 .uninit = uninit,
1097 .priv_size = sizeof(ScaleContext),
1098 .priv_class = &scale_class,
1099 FILTER_INPUTS(avfilter_vf_scale2ref_inputs),
1100 FILTER_OUTPUTS(avfilter_vf_scale2ref_outputs),
1101 FILTER_QUERY_FUNC(query_formats),
1102 .process_command = process_command,
1103 };
1104