2 * Copyright (c) 2007 Bobby Bingham
4 * This file is part of FFmpeg.
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.
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.
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
33 #include "libavutil/avstring.h"
34 #include "libavutil/eval.h"
35 #include "libavutil/internal.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/parseutils.h"
39 #include "libavutil/pixdesc.h"
40 #include "libavutil/imgutils.h"
41 #include "libavutil/avassert.h"
42 #include "libswscale/swscale.h"
44 static const char *const var_names[] = {
74 typedef struct ScaleContext {
76 struct SwsContext *sws; ///< software scaler context
77 struct SwsContext *isws[2]; ///< software scaler context for interlaced material
81 * New dimensions. Special values are:
82 * 0 = original width/height
83 * -1 = keep original aspect
84 * -N = try to keep aspect but make sure it is divisible by N
88 unsigned int flags; ///sws flags
89 double param[2]; // sws params
91 int hsub, vsub; ///< chroma subsampling
92 int slice_y; ///< top of current output slice
93 int input_is_pal; ///< set to 1 if the input format is paletted
94 int output_is_pal; ///< set to 1 if the output format is paletted
97 char *w_expr; ///< width expression string
98 char *h_expr; ///< height expression string
101 char *in_color_matrix;
102 char *out_color_matrix;
112 int force_original_aspect_ratio;
117 AVFilter ff_vf_scale2ref;
119 static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
121 ScaleContext *scale = ctx->priv;
124 if (scale->size_str && (scale->w_expr || scale->h_expr)) {
125 av_log(ctx, AV_LOG_ERROR,
126 "Size and width/height expressions cannot be set at the same time.\n");
127 return AVERROR(EINVAL);
130 if (scale->w_expr && !scale->h_expr)
131 FFSWAP(char *, scale->w_expr, scale->size_str);
133 if (scale->size_str) {
135 if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
136 av_log(ctx, AV_LOG_ERROR,
137 "Invalid size '%s'\n", scale->size_str);
140 snprintf(buf, sizeof(buf)-1, "%d", scale->w);
141 av_opt_set(scale, "w", buf, 0);
142 snprintf(buf, sizeof(buf)-1, "%d", scale->h);
143 av_opt_set(scale, "h", buf, 0);
146 av_opt_set(scale, "w", "iw", 0);
148 av_opt_set(scale, "h", "ih", 0);
150 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
151 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
155 if (scale->flags_str) {
156 const AVClass *class = sws_get_class();
157 const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
158 AV_OPT_SEARCH_FAKE_OBJ);
159 int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
169 static av_cold void uninit(AVFilterContext *ctx)
171 ScaleContext *scale = ctx->priv;
172 sws_freeContext(scale->sws);
173 sws_freeContext(scale->isws[0]);
174 sws_freeContext(scale->isws[1]);
176 av_dict_free(&scale->opts);
179 static int query_formats(AVFilterContext *ctx)
181 AVFilterFormats *formats;
182 enum AVPixelFormat pix_fmt;
185 if (ctx->inputs[0]) {
186 const AVPixFmtDescriptor *desc = NULL;
188 while ((desc = av_pix_fmt_desc_next(desc))) {
189 pix_fmt = av_pix_fmt_desc_get_id(desc);
190 if ((sws_isSupportedInput(pix_fmt) ||
191 sws_isSupportedEndiannessConversion(pix_fmt))
192 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
196 if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0)
199 if (ctx->outputs[0]) {
200 const AVPixFmtDescriptor *desc = NULL;
202 while ((desc = av_pix_fmt_desc_next(desc))) {
203 pix_fmt = av_pix_fmt_desc_get_id(desc);
204 if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
205 sws_isSupportedEndiannessConversion(pix_fmt))
206 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
210 if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0)
217 static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
222 if (s && strstr(s, "bt709")) {
223 colorspace = AVCOL_SPC_BT709;
224 } else if (s && strstr(s, "fcc")) {
225 colorspace = AVCOL_SPC_FCC;
226 } else if (s && strstr(s, "smpte240m")) {
227 colorspace = AVCOL_SPC_SMPTE240M;
228 } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
229 colorspace = AVCOL_SPC_BT470BG;
232 if (colorspace < 1 || colorspace > 7) {
233 colorspace = AVCOL_SPC_BT470BG;
236 return sws_getCoefficients(colorspace);
239 static int config_props(AVFilterLink *outlink)
241 AVFilterContext *ctx = outlink->src;
242 AVFilterLink *inlink0 = outlink->src->inputs[0];
243 AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
244 outlink->src->inputs[1] :
245 outlink->src->inputs[0];
246 enum AVPixelFormat outfmt = outlink->format;
247 ScaleContext *scale = ctx->priv;
248 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
249 const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
251 double var_values[VARS_NB], res;
254 int factor_w, factor_h;
256 var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
257 var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
258 var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
259 var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
260 var_values[VAR_A] = (double) inlink->w / inlink->h;
261 var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
262 (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
263 var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
264 var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
265 var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
266 var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
267 var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
269 /* evaluate width and height */
270 av_expr_parse_and_eval(&res, (expr = scale->w_expr),
271 var_names, var_values,
272 NULL, NULL, NULL, NULL, NULL, 0, ctx);
273 scale->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
274 if ((ret = av_expr_parse_and_eval(&res, (expr = scale->h_expr),
275 var_names, var_values,
276 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
278 scale->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
279 /* evaluate again the width, as it may depend on the output height */
280 if ((ret = av_expr_parse_and_eval(&res, (expr = scale->w_expr),
281 var_names, var_values,
282 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
289 /* Check if it is requested that the result has to be divisible by a some
290 * factor (w or h = -n with n being the factor). */
301 scale->w = scale->h = 0;
308 /* Make sure that the result is divisible by the factor we determined
309 * earlier. If no factor was set, it is nothing will happen as the default
312 w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w;
314 h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h;
316 /* Note that force_original_aspect_ratio may overwrite the previous set
317 * dimensions so that it is not divisible by the set factors anymore. */
318 if (scale->force_original_aspect_ratio) {
319 int tmp_w = av_rescale(h, inlink->w, inlink->h);
320 int tmp_h = av_rescale(w, inlink->h, inlink->w);
322 if (scale->force_original_aspect_ratio == 1) {
331 if (w > INT_MAX || h > INT_MAX ||
332 (h * inlink->w) > INT_MAX ||
333 (w * inlink->h) > INT_MAX)
334 av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
339 /* TODO: make algorithm configurable */
341 scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL ||
342 desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
343 if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
344 scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL ||
345 av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
348 sws_freeContext(scale->sws);
350 sws_freeContext(scale->isws[0]);
352 sws_freeContext(scale->isws[1]);
353 scale->isws[0] = scale->isws[1] = scale->sws = NULL;
354 if (inlink0->w == outlink->w &&
355 inlink0->h == outlink->h &&
356 !scale->out_color_matrix &&
357 scale->in_range == scale->out_range &&
358 inlink0->format == outlink->format)
361 struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
364 for (i = 0; i < 3; i++) {
365 struct SwsContext **s = swscs[i];
366 *s = sws_alloc_context();
368 return AVERROR(ENOMEM);
370 av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
371 av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
372 av_opt_set_int(*s, "src_format", inlink0->format, 0);
373 av_opt_set_int(*s, "dstw", outlink->w, 0);
374 av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
375 av_opt_set_int(*s, "dst_format", outfmt, 0);
376 av_opt_set_int(*s, "sws_flags", scale->flags, 0);
377 av_opt_set_int(*s, "param0", scale->param[0], 0);
378 av_opt_set_int(*s, "param1", scale->param[1], 0);
379 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
380 av_opt_set_int(*s, "src_range",
381 scale->in_range == AVCOL_RANGE_JPEG, 0);
382 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
383 av_opt_set_int(*s, "dst_range",
384 scale->out_range == AVCOL_RANGE_JPEG, 0);
387 AVDictionaryEntry *e = NULL;
388 while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
389 if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
393 /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
394 * MPEG-2 chroma positions are used by convention
395 * XXX: support other 4:2:0 pixel formats */
396 if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) {
397 scale->in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
400 if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) {
401 scale->out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
404 av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
405 av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0);
406 av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
407 av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0);
409 if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
411 if (!scale->interlaced)
416 if (inlink->sample_aspect_ratio.num){
417 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
419 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
421 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",
422 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
423 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
424 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
425 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
430 av_log(NULL, AV_LOG_ERROR,
431 "Error when evaluating the expression '%s'.\n"
432 "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
433 expr, scale->w_expr, scale->h_expr);
437 static int config_props_ref(AVFilterLink *outlink)
439 AVFilterLink *inlink = outlink->src->inputs[1];
441 outlink->w = inlink->w;
442 outlink->h = inlink->h;
443 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
444 outlink->time_base = inlink->time_base;
449 static int request_frame(AVFilterLink *outlink)
451 return ff_request_frame(outlink->src->inputs[0]);
454 static int request_frame_ref(AVFilterLink *outlink)
456 return ff_request_frame(outlink->src->inputs[1]);
459 static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
461 ScaleContext *scale = link->dst->priv;
462 const uint8_t *in[4];
464 int in_stride[4],out_stride[4];
468 int vsub= ((i+1)&2) ? scale->vsub : 0;
469 in_stride[i] = cur_pic->linesize[i] * mul;
470 out_stride[i] = out_buf->linesize[i] * mul;
471 in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
472 out[i] = out_buf->data[i] + field * out_buf->linesize[i];
474 if(scale->input_is_pal)
475 in[1] = cur_pic->data[1];
476 if(scale->output_is_pal)
477 out[1] = out_buf->data[1];
479 return sws_scale(sws, in, in_stride, y/mul, h,
483 static int filter_frame(AVFilterLink *link, AVFrame *in)
485 ScaleContext *scale = link->dst->priv;
486 AVFilterLink *outlink = link->dst->outputs[0];
488 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
492 if (av_frame_get_colorspace(in) == AVCOL_SPC_YCGCO)
493 av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
495 if( in->width != link->w
496 || in->height != link->h
497 || in->format != link->format) {
499 snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
500 av_opt_set(scale, "w", buf, 0);
501 snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
502 av_opt_set(scale, "h", buf, 0);
504 link->dst->inputs[0]->format = in->format;
505 link->dst->inputs[0]->w = in->width;
506 link->dst->inputs[0]->h = in->height;
508 if ((ret = config_props(outlink)) < 0)
513 return ff_filter_frame(outlink, in);
515 scale->hsub = desc->log2_chroma_w;
516 scale->vsub = desc->log2_chroma_h;
518 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
521 return AVERROR(ENOMEM);
524 av_frame_copy_props(out, in);
525 out->width = outlink->w;
526 out->height = outlink->h;
528 if(scale->output_is_pal)
529 avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
531 in_range = av_frame_get_color_range(in);
533 if ( scale->in_color_matrix
534 || scale->out_color_matrix
535 || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
536 || in_range != AVCOL_RANGE_UNSPECIFIED
537 || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
538 int in_full, out_full, brightness, contrast, saturation;
539 const int *inv_table, *table;
541 sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
542 (int **)&table, &out_full,
543 &brightness, &contrast, &saturation);
545 if (scale->in_color_matrix)
546 inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in));
547 if (scale->out_color_matrix)
548 table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED);
549 else if (scale->in_color_matrix)
552 if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
553 in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
554 else if (in_range != AVCOL_RANGE_UNSPECIFIED)
555 in_full = (in_range == AVCOL_RANGE_JPEG);
556 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
557 out_full = (scale->out_range == AVCOL_RANGE_JPEG);
559 sws_setColorspaceDetails(scale->sws, inv_table, in_full,
561 brightness, contrast, saturation);
563 sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
565 brightness, contrast, saturation);
567 sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
569 brightness, contrast, saturation);
571 av_frame_set_color_range(out, out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG);
574 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
575 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
576 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
579 if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
580 scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
581 scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
582 }else if (scale->nb_slices) {
583 int i, slice_h, slice_start, slice_end = 0;
584 const int nb_slices = FFMIN(scale->nb_slices, link->h);
585 for (i = 0; i < nb_slices; i++) {
586 slice_start = slice_end;
587 slice_end = (link->h * (i+1)) / nb_slices;
588 slice_h = slice_end - slice_start;
589 scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
592 scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
596 return ff_filter_frame(outlink, out);
599 static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
601 AVFilterLink *outlink = link->dst->outputs[1];
603 return ff_filter_frame(outlink, in);
606 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
607 char *res, int res_len, int flags)
609 ScaleContext *scale = ctx->priv;
612 if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
613 || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
615 int old_w = scale->w;
616 int old_h = scale->h;
617 AVFilterLink *outlink = ctx->outputs[0];
619 av_opt_set(scale, cmd, args, 0);
620 if ((ret = config_props(outlink)) < 0) {
625 ret = AVERROR(ENOSYS);
630 static const AVClass *child_class_next(const AVClass *prev)
632 return prev ? NULL : sws_get_class();
635 #define OFFSET(x) offsetof(ScaleContext, x)
636 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
638 static const AVOption scale_options[] = {
639 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
640 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
641 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
642 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
643 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
644 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
645 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
646 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
647 { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS },
648 { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
649 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
650 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
651 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
652 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
653 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
654 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
655 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
656 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
657 { "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 },
658 { "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 },
659 { "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 },
660 { "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 },
661 { "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" },
662 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
663 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
664 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
665 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
666 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
667 { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
671 static const AVClass scale_class = {
672 .class_name = "scale",
673 .item_name = av_default_item_name,
674 .option = scale_options,
675 .version = LIBAVUTIL_VERSION_INT,
676 .category = AV_CLASS_CATEGORY_FILTER,
677 .child_class_next = child_class_next,
680 static const AVFilterPad avfilter_vf_scale_inputs[] = {
683 .type = AVMEDIA_TYPE_VIDEO,
684 .filter_frame = filter_frame,
689 static const AVFilterPad avfilter_vf_scale_outputs[] = {
692 .type = AVMEDIA_TYPE_VIDEO,
693 .config_props = config_props,
698 AVFilter ff_vf_scale = {
700 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
701 .init_dict = init_dict,
703 .query_formats = query_formats,
704 .priv_size = sizeof(ScaleContext),
705 .priv_class = &scale_class,
706 .inputs = avfilter_vf_scale_inputs,
707 .outputs = avfilter_vf_scale_outputs,
708 .process_command = process_command,
711 static const AVClass scale2ref_class = {
712 .class_name = "scale2ref",
713 .item_name = av_default_item_name,
714 .option = scale_options,
715 .version = LIBAVUTIL_VERSION_INT,
716 .category = AV_CLASS_CATEGORY_FILTER,
717 .child_class_next = child_class_next,
720 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
723 .type = AVMEDIA_TYPE_VIDEO,
724 .filter_frame = filter_frame,
728 .type = AVMEDIA_TYPE_VIDEO,
729 .filter_frame = filter_frame_ref,
734 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
737 .type = AVMEDIA_TYPE_VIDEO,
738 .config_props = config_props,
739 .request_frame= request_frame,
743 .type = AVMEDIA_TYPE_VIDEO,
744 .config_props = config_props_ref,
745 .request_frame= request_frame_ref,
750 AVFilter ff_vf_scale2ref = {
752 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
753 .init_dict = init_dict,
755 .query_formats = query_formats,
756 .priv_size = sizeof(ScaleContext),
757 .priv_class = &scale2ref_class,
758 .inputs = avfilter_vf_scale2ref_inputs,
759 .outputs = avfilter_vf_scale2ref_outputs,
760 .process_command = process_command,