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path: root/libavfilter/vf_scale.c (plain)
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1/*
2 * Copyright (c) 2007 Bobby Bingham
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * scale video filter
24 */
25
26#include <stdio.h>
27#include <string.h>
28
29#include "avfilter.h"
30#include "formats.h"
31#include "internal.h"
32#include "scale.h"
33#include "video.h"
34#include "libavutil/avstring.h"
35#include "libavutil/internal.h"
36#include "libavutil/mathematics.h"
37#include "libavutil/opt.h"
38#include "libavutil/parseutils.h"
39#include "libavutil/pixdesc.h"
40#include "libavutil/imgutils.h"
41#include "libavutil/avassert.h"
42#include "libswscale/swscale.h"
43
44enum EvalMode {
45 EVAL_MODE_INIT,
46 EVAL_MODE_FRAME,
47 EVAL_MODE_NB
48};
49
50typedef struct ScaleContext {
51 const AVClass *class;
52 struct SwsContext *sws; ///< software scaler context
53 struct SwsContext *isws[2]; ///< software scaler context for interlaced material
54 AVDictionary *opts;
55
56 /**
57 * New dimensions. Special values are:
58 * 0 = original width/height
59 * -1 = keep original aspect
60 * -N = try to keep aspect but make sure it is divisible by N
61 */
62 int w, h;
63 char *size_str;
64 unsigned int flags; ///sws flags
65 double param[2]; // sws params
66
67 int hsub, vsub; ///< chroma subsampling
68 int slice_y; ///< top of current output slice
69 int input_is_pal; ///< set to 1 if the input format is paletted
70 int output_is_pal; ///< set to 1 if the output format is paletted
71 int interlaced;
72
73 char *w_expr; ///< width expression string
74 char *h_expr; ///< height expression string
75 char *flags_str;
76
77 char *in_color_matrix;
78 char *out_color_matrix;
79
80 int in_range;
81 int out_range;
82
83 int out_h_chr_pos;
84 int out_v_chr_pos;
85 int in_h_chr_pos;
86 int in_v_chr_pos;
87
88 int force_original_aspect_ratio;
89
90 int nb_slices;
91
92 int eval_mode; ///< expression evaluation mode
93
94} ScaleContext;
95
96AVFilter ff_vf_scale2ref;
97
98static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
99{
100 ScaleContext *scale = ctx->priv;
101 int ret;
102
103 if (scale->size_str && (scale->w_expr || scale->h_expr)) {
104 av_log(ctx, AV_LOG_ERROR,
105 "Size and width/height expressions cannot be set at the same time.\n");
106 return AVERROR(EINVAL);
107 }
108
109 if (scale->w_expr && !scale->h_expr)
110 FFSWAP(char *, scale->w_expr, scale->size_str);
111
112 if (scale->size_str) {
113 char buf[32];
114 if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
115 av_log(ctx, AV_LOG_ERROR,
116 "Invalid size '%s'\n", scale->size_str);
117 return ret;
118 }
119 snprintf(buf, sizeof(buf)-1, "%d", scale->w);
120 av_opt_set(scale, "w", buf, 0);
121 snprintf(buf, sizeof(buf)-1, "%d", scale->h);
122 av_opt_set(scale, "h", buf, 0);
123 }
124 if (!scale->w_expr)
125 av_opt_set(scale, "w", "iw", 0);
126 if (!scale->h_expr)
127 av_opt_set(scale, "h", "ih", 0);
128
129 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
130 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
131
132 scale->flags = 0;
133
134 if (scale->flags_str) {
135 const AVClass *class = sws_get_class();
136 const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
137 AV_OPT_SEARCH_FAKE_OBJ);
138 int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
139 if (ret < 0)
140 return ret;
141 }
142 scale->opts = *opts;
143 *opts = NULL;
144
145 return 0;
146}
147
148static av_cold void uninit(AVFilterContext *ctx)
149{
150 ScaleContext *scale = ctx->priv;
151 sws_freeContext(scale->sws);
152 sws_freeContext(scale->isws[0]);
153 sws_freeContext(scale->isws[1]);
154 scale->sws = NULL;
155 av_dict_free(&scale->opts);
156}
157
158static int query_formats(AVFilterContext *ctx)
159{
160 AVFilterFormats *formats;
161 enum AVPixelFormat pix_fmt;
162 int ret;
163
164 if (ctx->inputs[0]) {
165 const AVPixFmtDescriptor *desc = NULL;
166 formats = NULL;
167 while ((desc = av_pix_fmt_desc_next(desc))) {
168 pix_fmt = av_pix_fmt_desc_get_id(desc);
169 if ((sws_isSupportedInput(pix_fmt) ||
170 sws_isSupportedEndiannessConversion(pix_fmt))
171 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
172 return ret;
173 }
174 }
175 if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0)
176 return ret;
177 }
178 if (ctx->outputs[0]) {
179 const AVPixFmtDescriptor *desc = NULL;
180 formats = NULL;
181 while ((desc = av_pix_fmt_desc_next(desc))) {
182 pix_fmt = av_pix_fmt_desc_get_id(desc);
183 if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
184 sws_isSupportedEndiannessConversion(pix_fmt))
185 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
186 return ret;
187 }
188 }
189 if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0)
190 return ret;
191 }
192
193 return 0;
194}
195
196static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
197{
198 if (!s)
199 s = "bt601";
200
201 if (s && strstr(s, "bt709")) {
202 colorspace = AVCOL_SPC_BT709;
203 } else if (s && strstr(s, "fcc")) {
204 colorspace = AVCOL_SPC_FCC;
205 } else if (s && strstr(s, "smpte240m")) {
206 colorspace = AVCOL_SPC_SMPTE240M;
207 } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
208 colorspace = AVCOL_SPC_BT470BG;
209 } else if (s && strstr(s, "bt2020")) {
210 colorspace = AVCOL_SPC_BT2020_NCL;
211 }
212
213 if (colorspace < 1 || colorspace > 10 || colorspace == 8) {
214 colorspace = AVCOL_SPC_BT470BG;
215 }
216
217 return sws_getCoefficients(colorspace);
218}
219
220static int config_props(AVFilterLink *outlink)
221{
222 AVFilterContext *ctx = outlink->src;
223 AVFilterLink *inlink0 = outlink->src->inputs[0];
224 AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
225 outlink->src->inputs[1] :
226 outlink->src->inputs[0];
227 enum AVPixelFormat outfmt = outlink->format;
228 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
229 ScaleContext *scale = ctx->priv;
230 int w, h;
231 int ret;
232
233 if ((ret = ff_scale_eval_dimensions(ctx,
234 scale->w_expr, scale->h_expr,
235 inlink, outlink,
236 &w, &h)) < 0)
237 goto fail;
238
239 /* Note that force_original_aspect_ratio may overwrite the previous set
240 * dimensions so that it is not divisible by the set factors anymore. */
241 if (scale->force_original_aspect_ratio) {
242 int tmp_w = av_rescale(h, inlink->w, inlink->h);
243 int tmp_h = av_rescale(w, inlink->h, inlink->w);
244
245 if (scale->force_original_aspect_ratio == 1) {
246 w = FFMIN(tmp_w, w);
247 h = FFMIN(tmp_h, h);
248 } else {
249 w = FFMAX(tmp_w, w);
250 h = FFMAX(tmp_h, h);
251 }
252 }
253
254 if (w > INT_MAX || h > INT_MAX ||
255 (h * inlink->w) > INT_MAX ||
256 (w * inlink->h) > INT_MAX)
257 av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
258
259 outlink->w = w;
260 outlink->h = h;
261
262 /* TODO: make algorithm configurable */
263
264 scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL ||
265 desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
266 if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
267 scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL ||
268 av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
269
270 if (scale->sws)
271 sws_freeContext(scale->sws);
272 if (scale->isws[0])
273 sws_freeContext(scale->isws[0]);
274 if (scale->isws[1])
275 sws_freeContext(scale->isws[1]);
276 scale->isws[0] = scale->isws[1] = scale->sws = NULL;
277 if (inlink0->w == outlink->w &&
278 inlink0->h == outlink->h &&
279 !scale->out_color_matrix &&
280 scale->in_range == scale->out_range &&
281 inlink0->format == outlink->format)
282 ;
283 else {
284 struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
285 int i;
286
287 for (i = 0; i < 3; i++) {
288 int in_v_chr_pos = scale->in_v_chr_pos, out_v_chr_pos = scale->out_v_chr_pos;
289 struct SwsContext **s = swscs[i];
290 *s = sws_alloc_context();
291 if (!*s)
292 return AVERROR(ENOMEM);
293
294 av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
295 av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
296 av_opt_set_int(*s, "src_format", inlink0->format, 0);
297 av_opt_set_int(*s, "dstw", outlink->w, 0);
298 av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
299 av_opt_set_int(*s, "dst_format", outfmt, 0);
300 av_opt_set_int(*s, "sws_flags", scale->flags, 0);
301 av_opt_set_int(*s, "param0", scale->param[0], 0);
302 av_opt_set_int(*s, "param1", scale->param[1], 0);
303 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
304 av_opt_set_int(*s, "src_range",
305 scale->in_range == AVCOL_RANGE_JPEG, 0);
306 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
307 av_opt_set_int(*s, "dst_range",
308 scale->out_range == AVCOL_RANGE_JPEG, 0);
309
310 if (scale->opts) {
311 AVDictionaryEntry *e = NULL;
312 while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
313 if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
314 return ret;
315 }
316 }
317 /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
318 * MPEG-2 chroma positions are used by convention
319 * XXX: support other 4:2:0 pixel formats */
320 if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) {
321 in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
322 }
323
324 if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) {
325 out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
326 }
327
328 av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
329 av_opt_set_int(*s, "src_v_chr_pos", in_v_chr_pos, 0);
330 av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
331 av_opt_set_int(*s, "dst_v_chr_pos", out_v_chr_pos, 0);
332
333 if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
334 return ret;
335 if (!scale->interlaced)
336 break;
337 }
338 }
339
340 if (inlink->sample_aspect_ratio.num){
341 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
342 } else
343 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
344
345 av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n",
346 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
347 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
348 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
349 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
350 scale->flags);
351 return 0;
352
353fail:
354 return ret;
355}
356
357static int config_props_ref(AVFilterLink *outlink)
358{
359 AVFilterLink *inlink = outlink->src->inputs[1];
360
361 outlink->w = inlink->w;
362 outlink->h = inlink->h;
363 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
364 outlink->time_base = inlink->time_base;
365
366 return 0;
367}
368
369static int request_frame(AVFilterLink *outlink)
370{
371 return ff_request_frame(outlink->src->inputs[0]);
372}
373
374static int request_frame_ref(AVFilterLink *outlink)
375{
376 return ff_request_frame(outlink->src->inputs[1]);
377}
378
379static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
380{
381 ScaleContext *scale = link->dst->priv;
382 const uint8_t *in[4];
383 uint8_t *out[4];
384 int in_stride[4],out_stride[4];
385 int i;
386
387 for(i=0; i<4; i++){
388 int vsub= ((i+1)&2) ? scale->vsub : 0;
389 in_stride[i] = cur_pic->linesize[i] * mul;
390 out_stride[i] = out_buf->linesize[i] * mul;
391 in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
392 out[i] = out_buf->data[i] + field * out_buf->linesize[i];
393 }
394 if(scale->input_is_pal)
395 in[1] = cur_pic->data[1];
396 if(scale->output_is_pal)
397 out[1] = out_buf->data[1];
398
399 return sws_scale(sws, in, in_stride, y/mul, h,
400 out,out_stride);
401}
402
403static int filter_frame(AVFilterLink *link, AVFrame *in)
404{
405 ScaleContext *scale = link->dst->priv;
406 AVFilterLink *outlink = link->dst->outputs[0];
407 AVFrame *out;
408 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
409 char buf[32];
410 int in_range;
411
412 if (av_frame_get_colorspace(in) == AVCOL_SPC_YCGCO)
413 av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
414
415 if( in->width != link->w
416 || in->height != link->h
417 || in->format != link->format
418 || in->sample_aspect_ratio.den != link->sample_aspect_ratio.den || in->sample_aspect_ratio.num != link->sample_aspect_ratio.num) {
419 int ret;
420
421 if (scale->eval_mode == EVAL_MODE_INIT) {
422 snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
423 av_opt_set(scale, "w", buf, 0);
424 snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
425 av_opt_set(scale, "h", buf, 0);
426 }
427
428 link->dst->inputs[0]->format = in->format;
429 link->dst->inputs[0]->w = in->width;
430 link->dst->inputs[0]->h = in->height;
431
432 link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
433 link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
434
435
436 if ((ret = config_props(outlink)) < 0)
437 return ret;
438 }
439
440 if (!scale->sws)
441 return ff_filter_frame(outlink, in);
442
443 scale->hsub = desc->log2_chroma_w;
444 scale->vsub = desc->log2_chroma_h;
445
446 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
447 if (!out) {
448 av_frame_free(&in);
449 return AVERROR(ENOMEM);
450 }
451
452 av_frame_copy_props(out, in);
453 out->width = outlink->w;
454 out->height = outlink->h;
455
456 if(scale->output_is_pal)
457 avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
458
459 in_range = av_frame_get_color_range(in);
460
461 if ( scale->in_color_matrix
462 || scale->out_color_matrix
463 || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
464 || in_range != AVCOL_RANGE_UNSPECIFIED
465 || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
466 int in_full, out_full, brightness, contrast, saturation;
467 const int *inv_table, *table;
468
469 sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
470 (int **)&table, &out_full,
471 &brightness, &contrast, &saturation);
472
473 if (scale->in_color_matrix)
474 inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in));
475 if (scale->out_color_matrix)
476 table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED);
477 else if (scale->in_color_matrix)
478 table = inv_table;
479
480 if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
481 in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
482 else if (in_range != AVCOL_RANGE_UNSPECIFIED)
483 in_full = (in_range == AVCOL_RANGE_JPEG);
484 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
485 out_full = (scale->out_range == AVCOL_RANGE_JPEG);
486
487 sws_setColorspaceDetails(scale->sws, inv_table, in_full,
488 table, out_full,
489 brightness, contrast, saturation);
490 if (scale->isws[0])
491 sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
492 table, out_full,
493 brightness, contrast, saturation);
494 if (scale->isws[1])
495 sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
496 table, out_full,
497 brightness, contrast, saturation);
498
499 av_frame_set_color_range(out, out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG);
500 }
501
502 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
503 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
504 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
505 INT_MAX);
506
507 if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
508 scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
509 scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
510 }else if (scale->nb_slices) {
511 int i, slice_h, slice_start, slice_end = 0;
512 const int nb_slices = FFMIN(scale->nb_slices, link->h);
513 for (i = 0; i < nb_slices; i++) {
514 slice_start = slice_end;
515 slice_end = (link->h * (i+1)) / nb_slices;
516 slice_h = slice_end - slice_start;
517 scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
518 }
519 }else{
520 scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
521 }
522
523 av_frame_free(&in);
524 return ff_filter_frame(outlink, out);
525}
526
527static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
528{
529 AVFilterLink *outlink = link->dst->outputs[1];
530
531 return ff_filter_frame(outlink, in);
532}
533
534static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
535 char *res, int res_len, int flags)
536{
537 ScaleContext *scale = ctx->priv;
538 int ret;
539
540 if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
541 || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
542
543 int old_w = scale->w;
544 int old_h = scale->h;
545 AVFilterLink *outlink = ctx->outputs[0];
546
547 av_opt_set(scale, cmd, args, 0);
548 if ((ret = config_props(outlink)) < 0) {
549 scale->w = old_w;
550 scale->h = old_h;
551 }
552 } else
553 ret = AVERROR(ENOSYS);
554
555 return ret;
556}
557
558static const AVClass *child_class_next(const AVClass *prev)
559{
560 return prev ? NULL : sws_get_class();
561}
562
563#define OFFSET(x) offsetof(ScaleContext, x)
564#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
565
566static const AVOption scale_options[] = {
567 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
568 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
569 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
570 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
571 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
572 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
573 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
574 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
575 { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS },
576 { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
577 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
578 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
579 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
580 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
581 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
582 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
583 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
584 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
585 { "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 },
586 { "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 },
587 { "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 },
588 { "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 },
589 { "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" },
590 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
591 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
592 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
593 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
594 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
595 { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
596 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
597 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
598 { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
599 { NULL }
600};
601
602static const AVClass scale_class = {
603 .class_name = "scale",
604 .item_name = av_default_item_name,
605 .option = scale_options,
606 .version = LIBAVUTIL_VERSION_INT,
607 .category = AV_CLASS_CATEGORY_FILTER,
608 .child_class_next = child_class_next,
609};
610
611static const AVFilterPad avfilter_vf_scale_inputs[] = {
612 {
613 .name = "default",
614 .type = AVMEDIA_TYPE_VIDEO,
615 .filter_frame = filter_frame,
616 },
617 { NULL }
618};
619
620static const AVFilterPad avfilter_vf_scale_outputs[] = {
621 {
622 .name = "default",
623 .type = AVMEDIA_TYPE_VIDEO,
624 .config_props = config_props,
625 },
626 { NULL }
627};
628
629AVFilter ff_vf_scale = {
630 .name = "scale",
631 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
632 .init_dict = init_dict,
633 .uninit = uninit,
634 .query_formats = query_formats,
635 .priv_size = sizeof(ScaleContext),
636 .priv_class = &scale_class,
637 .inputs = avfilter_vf_scale_inputs,
638 .outputs = avfilter_vf_scale_outputs,
639 .process_command = process_command,
640};
641
642static const AVClass scale2ref_class = {
643 .class_name = "scale2ref",
644 .item_name = av_default_item_name,
645 .option = scale_options,
646 .version = LIBAVUTIL_VERSION_INT,
647 .category = AV_CLASS_CATEGORY_FILTER,
648 .child_class_next = child_class_next,
649};
650
651static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
652 {
653 .name = "default",
654 .type = AVMEDIA_TYPE_VIDEO,
655 .filter_frame = filter_frame,
656 },
657 {
658 .name = "ref",
659 .type = AVMEDIA_TYPE_VIDEO,
660 .filter_frame = filter_frame_ref,
661 },
662 { NULL }
663};
664
665static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
666 {
667 .name = "default",
668 .type = AVMEDIA_TYPE_VIDEO,
669 .config_props = config_props,
670 .request_frame= request_frame,
671 },
672 {
673 .name = "ref",
674 .type = AVMEDIA_TYPE_VIDEO,
675 .config_props = config_props_ref,
676 .request_frame= request_frame_ref,
677 },
678 { NULL }
679};
680
681AVFilter ff_vf_scale2ref = {
682 .name = "scale2ref",
683 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
684 .init_dict = init_dict,
685 .uninit = uninit,
686 .query_formats = query_formats,
687 .priv_size = sizeof(ScaleContext),
688 .priv_class = &scale2ref_class,
689 .inputs = avfilter_vf_scale2ref_inputs,
690 .outputs = avfilter_vf_scale2ref_outputs,
691 .process_command = process_command,
692};
693
generated by cgit at 2024-05-17 05:02:05 (GMT)