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[] = {
81 typedef struct ScaleContext {
83 struct SwsContext *sws; ///< software scaler context
84 struct SwsContext *isws[2]; ///< software scaler context for interlaced material
88 * New dimensions. Special values are:
89 * 0 = original width/height
90 * -1 = keep original aspect
91 * -N = try to keep aspect but make sure it is divisible by N
95 unsigned int flags; ///sws flags
96 double param[2]; // sws params
98 int hsub, vsub; ///< chroma subsampling
99 int slice_y; ///< top of current output slice
100 int input_is_pal; ///< set to 1 if the input format is paletted
101 int output_is_pal; ///< set to 1 if the output format is paletted
104 char *w_expr; ///< width expression string
105 char *h_expr; ///< height expression string
108 char *in_color_matrix;
109 char *out_color_matrix;
119 int force_original_aspect_ratio;
123 int eval_mode; ///< expression evaluation mode
127 AVFilter ff_vf_scale2ref;
129 static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
131 ScaleContext *scale = ctx->priv;
134 if (scale->size_str && (scale->w_expr || scale->h_expr)) {
135 av_log(ctx, AV_LOG_ERROR,
136 "Size and width/height expressions cannot be set at the same time.\n");
137 return AVERROR(EINVAL);
140 if (scale->w_expr && !scale->h_expr)
141 FFSWAP(char *, scale->w_expr, scale->size_str);
143 if (scale->size_str) {
145 if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
146 av_log(ctx, AV_LOG_ERROR,
147 "Invalid size '%s'\n", scale->size_str);
150 snprintf(buf, sizeof(buf)-1, "%d", scale->w);
151 av_opt_set(scale, "w", buf, 0);
152 snprintf(buf, sizeof(buf)-1, "%d", scale->h);
153 av_opt_set(scale, "h", buf, 0);
156 av_opt_set(scale, "w", "iw", 0);
158 av_opt_set(scale, "h", "ih", 0);
160 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
161 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
165 if (scale->flags_str) {
166 const AVClass *class = sws_get_class();
167 const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
168 AV_OPT_SEARCH_FAKE_OBJ);
169 int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
179 static av_cold void uninit(AVFilterContext *ctx)
181 ScaleContext *scale = ctx->priv;
182 sws_freeContext(scale->sws);
183 sws_freeContext(scale->isws[0]);
184 sws_freeContext(scale->isws[1]);
186 av_dict_free(&scale->opts);
189 static int query_formats(AVFilterContext *ctx)
191 AVFilterFormats *formats;
192 enum AVPixelFormat pix_fmt;
195 if (ctx->inputs[0]) {
196 const AVPixFmtDescriptor *desc = NULL;
198 while ((desc = av_pix_fmt_desc_next(desc))) {
199 pix_fmt = av_pix_fmt_desc_get_id(desc);
200 if ((sws_isSupportedInput(pix_fmt) ||
201 sws_isSupportedEndiannessConversion(pix_fmt))
202 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
206 if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0)
209 if (ctx->outputs[0]) {
210 const AVPixFmtDescriptor *desc = NULL;
212 while ((desc = av_pix_fmt_desc_next(desc))) {
213 pix_fmt = av_pix_fmt_desc_get_id(desc);
214 if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
215 sws_isSupportedEndiannessConversion(pix_fmt))
216 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
220 if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0)
227 static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
232 if (s && strstr(s, "bt709")) {
233 colorspace = AVCOL_SPC_BT709;
234 } else if (s && strstr(s, "fcc")) {
235 colorspace = AVCOL_SPC_FCC;
236 } else if (s && strstr(s, "smpte240m")) {
237 colorspace = AVCOL_SPC_SMPTE240M;
238 } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
239 colorspace = AVCOL_SPC_BT470BG;
240 } else if (s && strstr(s, "bt2020")) {
241 colorspace = AVCOL_SPC_BT2020_NCL;
244 if (colorspace < 1 || colorspace > 10 || colorspace == 8) {
245 colorspace = AVCOL_SPC_BT470BG;
248 return sws_getCoefficients(colorspace);
251 static int config_props(AVFilterLink *outlink)
253 AVFilterContext *ctx = outlink->src;
254 AVFilterLink *inlink0 = outlink->src->inputs[0];
255 AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
256 outlink->src->inputs[1] :
257 outlink->src->inputs[0];
258 enum AVPixelFormat outfmt = outlink->format;
259 ScaleContext *scale = ctx->priv;
260 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
261 const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
263 double var_values[VARS_NB], res;
266 int factor_w, factor_h;
268 var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
269 var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
270 var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
271 var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
272 var_values[VAR_A] = (double) inlink->w / inlink->h;
273 var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
274 (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
275 var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
276 var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
277 var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
278 var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
279 var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
281 /* evaluate width and height */
282 av_expr_parse_and_eval(&res, (expr = scale->w_expr),
283 var_names, var_values,
284 NULL, NULL, NULL, NULL, NULL, 0, ctx);
285 scale->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
286 if ((ret = av_expr_parse_and_eval(&res, (expr = scale->h_expr),
287 var_names, var_values,
288 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
290 scale->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
291 /* evaluate again the width, as it may depend on the output height */
292 if ((ret = av_expr_parse_and_eval(&res, (expr = scale->w_expr),
293 var_names, var_values,
294 NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
301 /* Check if it is requested that the result has to be divisible by a some
302 * factor (w or h = -n with n being the factor). */
313 scale->w = scale->h = 0;
320 /* Make sure that the result is divisible by the factor we determined
321 * earlier. If no factor was set, it is nothing will happen as the default
324 w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w;
326 h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h;
328 /* Note that force_original_aspect_ratio may overwrite the previous set
329 * dimensions so that it is not divisible by the set factors anymore. */
330 if (scale->force_original_aspect_ratio) {
331 int tmp_w = av_rescale(h, inlink->w, inlink->h);
332 int tmp_h = av_rescale(w, inlink->h, inlink->w);
334 if (scale->force_original_aspect_ratio == 1) {
343 if (w > INT_MAX || h > INT_MAX ||
344 (h * inlink->w) > INT_MAX ||
345 (w * inlink->h) > INT_MAX)
346 av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
351 /* TODO: make algorithm configurable */
353 scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL ||
354 desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
355 if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
356 scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL ||
357 av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL;
360 sws_freeContext(scale->sws);
362 sws_freeContext(scale->isws[0]);
364 sws_freeContext(scale->isws[1]);
365 scale->isws[0] = scale->isws[1] = scale->sws = NULL;
366 if (inlink0->w == outlink->w &&
367 inlink0->h == outlink->h &&
368 !scale->out_color_matrix &&
369 scale->in_range == scale->out_range &&
370 inlink0->format == outlink->format)
373 struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
376 for (i = 0; i < 3; i++) {
377 struct SwsContext **s = swscs[i];
378 *s = sws_alloc_context();
380 return AVERROR(ENOMEM);
382 av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
383 av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
384 av_opt_set_int(*s, "src_format", inlink0->format, 0);
385 av_opt_set_int(*s, "dstw", outlink->w, 0);
386 av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
387 av_opt_set_int(*s, "dst_format", outfmt, 0);
388 av_opt_set_int(*s, "sws_flags", scale->flags, 0);
389 av_opt_set_int(*s, "param0", scale->param[0], 0);
390 av_opt_set_int(*s, "param1", scale->param[1], 0);
391 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
392 av_opt_set_int(*s, "src_range",
393 scale->in_range == AVCOL_RANGE_JPEG, 0);
394 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
395 av_opt_set_int(*s, "dst_range",
396 scale->out_range == AVCOL_RANGE_JPEG, 0);
399 AVDictionaryEntry *e = NULL;
400 while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
401 if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
405 /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
406 * MPEG-2 chroma positions are used by convention
407 * XXX: support other 4:2:0 pixel formats */
408 if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) {
409 scale->in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
412 if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) {
413 scale->out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
416 av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
417 av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0);
418 av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
419 av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0);
421 if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
423 if (!scale->interlaced)
428 if (inlink->sample_aspect_ratio.num){
429 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio);
431 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
433 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",
434 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
435 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
436 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
437 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
442 av_log(NULL, AV_LOG_ERROR,
443 "Error when evaluating the expression '%s'.\n"
444 "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
445 expr, scale->w_expr, scale->h_expr);
449 static int config_props_ref(AVFilterLink *outlink)
451 AVFilterLink *inlink = outlink->src->inputs[1];
453 outlink->w = inlink->w;
454 outlink->h = inlink->h;
455 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
456 outlink->time_base = inlink->time_base;
461 static int request_frame(AVFilterLink *outlink)
463 return ff_request_frame(outlink->src->inputs[0]);
466 static int request_frame_ref(AVFilterLink *outlink)
468 return ff_request_frame(outlink->src->inputs[1]);
471 static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
473 ScaleContext *scale = link->dst->priv;
474 const uint8_t *in[4];
476 int in_stride[4],out_stride[4];
480 int vsub= ((i+1)&2) ? scale->vsub : 0;
481 in_stride[i] = cur_pic->linesize[i] * mul;
482 out_stride[i] = out_buf->linesize[i] * mul;
483 in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
484 out[i] = out_buf->data[i] + field * out_buf->linesize[i];
486 if(scale->input_is_pal)
487 in[1] = cur_pic->data[1];
488 if(scale->output_is_pal)
489 out[1] = out_buf->data[1];
491 return sws_scale(sws, in, in_stride, y/mul, h,
495 static int filter_frame(AVFilterLink *link, AVFrame *in)
497 ScaleContext *scale = link->dst->priv;
498 AVFilterLink *outlink = link->dst->outputs[0];
500 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
504 if (av_frame_get_colorspace(in) == AVCOL_SPC_YCGCO)
505 av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
507 if( in->width != link->w
508 || in->height != link->h
509 || in->format != link->format
510 || in->sample_aspect_ratio.den != link->sample_aspect_ratio.den || in->sample_aspect_ratio.num != link->sample_aspect_ratio.num) {
513 if (scale->eval_mode == EVAL_MODE_INIT) {
514 snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
515 av_opt_set(scale, "w", buf, 0);
516 snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
517 av_opt_set(scale, "h", buf, 0);
520 link->dst->inputs[0]->format = in->format;
521 link->dst->inputs[0]->w = in->width;
522 link->dst->inputs[0]->h = in->height;
524 link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
525 link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
528 if ((ret = config_props(outlink)) < 0)
533 return ff_filter_frame(outlink, in);
535 scale->hsub = desc->log2_chroma_w;
536 scale->vsub = desc->log2_chroma_h;
538 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
541 return AVERROR(ENOMEM);
544 av_frame_copy_props(out, in);
545 out->width = outlink->w;
546 out->height = outlink->h;
548 if(scale->output_is_pal)
549 avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
551 in_range = av_frame_get_color_range(in);
553 if ( scale->in_color_matrix
554 || scale->out_color_matrix
555 || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
556 || in_range != AVCOL_RANGE_UNSPECIFIED
557 || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
558 int in_full, out_full, brightness, contrast, saturation;
559 const int *inv_table, *table;
561 sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
562 (int **)&table, &out_full,
563 &brightness, &contrast, &saturation);
565 if (scale->in_color_matrix)
566 inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in));
567 if (scale->out_color_matrix)
568 table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED);
569 else if (scale->in_color_matrix)
572 if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
573 in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
574 else if (in_range != AVCOL_RANGE_UNSPECIFIED)
575 in_full = (in_range == AVCOL_RANGE_JPEG);
576 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
577 out_full = (scale->out_range == AVCOL_RANGE_JPEG);
579 sws_setColorspaceDetails(scale->sws, inv_table, in_full,
581 brightness, contrast, saturation);
583 sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
585 brightness, contrast, saturation);
587 sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
589 brightness, contrast, saturation);
591 av_frame_set_color_range(out, out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG);
594 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
595 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
596 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
599 if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){
600 scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
601 scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
602 }else if (scale->nb_slices) {
603 int i, slice_h, slice_start, slice_end = 0;
604 const int nb_slices = FFMIN(scale->nb_slices, link->h);
605 for (i = 0; i < nb_slices; i++) {
606 slice_start = slice_end;
607 slice_end = (link->h * (i+1)) / nb_slices;
608 slice_h = slice_end - slice_start;
609 scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
612 scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
616 return ff_filter_frame(outlink, out);
619 static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
621 AVFilterLink *outlink = link->dst->outputs[1];
623 return ff_filter_frame(outlink, in);
626 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
627 char *res, int res_len, int flags)
629 ScaleContext *scale = ctx->priv;
632 if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
633 || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
635 int old_w = scale->w;
636 int old_h = scale->h;
637 AVFilterLink *outlink = ctx->outputs[0];
639 av_opt_set(scale, cmd, args, 0);
640 if ((ret = config_props(outlink)) < 0) {
645 ret = AVERROR(ENOSYS);
650 static const AVClass *child_class_next(const AVClass *prev)
652 return prev ? NULL : sws_get_class();
655 #define OFFSET(x) offsetof(ScaleContext, x)
656 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
658 static const AVOption scale_options[] = {
659 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
660 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
661 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
662 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
663 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
664 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
665 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
666 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
667 { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS },
668 { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
669 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
670 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
671 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
672 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
673 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
674 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
675 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
676 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
677 { "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 },
678 { "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 },
679 { "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 },
680 { "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 },
681 { "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" },
682 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
683 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
684 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
685 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
686 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
687 { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
688 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
689 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
690 { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
694 static const AVClass scale_class = {
695 .class_name = "scale",
696 .item_name = av_default_item_name,
697 .option = scale_options,
698 .version = LIBAVUTIL_VERSION_INT,
699 .category = AV_CLASS_CATEGORY_FILTER,
700 .child_class_next = child_class_next,
703 static const AVFilterPad avfilter_vf_scale_inputs[] = {
706 .type = AVMEDIA_TYPE_VIDEO,
707 .filter_frame = filter_frame,
712 static const AVFilterPad avfilter_vf_scale_outputs[] = {
715 .type = AVMEDIA_TYPE_VIDEO,
716 .config_props = config_props,
721 AVFilter ff_vf_scale = {
723 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
724 .init_dict = init_dict,
726 .query_formats = query_formats,
727 .priv_size = sizeof(ScaleContext),
728 .priv_class = &scale_class,
729 .inputs = avfilter_vf_scale_inputs,
730 .outputs = avfilter_vf_scale_outputs,
731 .process_command = process_command,
734 static const AVClass scale2ref_class = {
735 .class_name = "scale2ref",
736 .item_name = av_default_item_name,
737 .option = scale_options,
738 .version = LIBAVUTIL_VERSION_INT,
739 .category = AV_CLASS_CATEGORY_FILTER,
740 .child_class_next = child_class_next,
743 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
746 .type = AVMEDIA_TYPE_VIDEO,
747 .filter_frame = filter_frame,
751 .type = AVMEDIA_TYPE_VIDEO,
752 .filter_frame = filter_frame_ref,
757 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
760 .type = AVMEDIA_TYPE_VIDEO,
761 .config_props = config_props,
762 .request_frame= request_frame,
766 .type = AVMEDIA_TYPE_VIDEO,
767 .config_props = config_props_ref,
768 .request_frame= request_frame_ref,
773 AVFilter ff_vf_scale2ref = {
775 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
776 .init_dict = init_dict,
778 .query_formats = query_formats,
779 .priv_size = sizeof(ScaleContext),
780 .priv_class = &scale2ref_class,
781 .inputs = avfilter_vf_scale2ref_inputs,
782 .outputs = avfilter_vf_scale2ref_outputs,
783 .process_command = process_command,