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
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"
50 typedef struct ScaleContext {
52 struct SwsContext *sws; ///< software scaler context
53 struct SwsContext *isws[2]; ///< software scaler context for interlaced material
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
64 unsigned int flags; ///sws flags
65 double param[2]; // sws params
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
73 char *w_expr; ///< width expression string
74 char *h_expr; ///< height expression string
77 char *in_color_matrix;
78 char *out_color_matrix;
88 int force_original_aspect_ratio;
89 int force_divisible_by;
93 int eval_mode; ///< expression evaluation mode
97 AVFilter ff_vf_scale2ref;
99 static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts)
101 ScaleContext *scale = ctx->priv;
104 if (scale->size_str && (scale->w_expr || scale->h_expr)) {
105 av_log(ctx, AV_LOG_ERROR,
106 "Size and width/height expressions cannot be set at the same time.\n");
107 return AVERROR(EINVAL);
110 if (scale->w_expr && !scale->h_expr)
111 FFSWAP(char *, scale->w_expr, scale->size_str);
113 if (scale->size_str) {
115 if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) {
116 av_log(ctx, AV_LOG_ERROR,
117 "Invalid size '%s'\n", scale->size_str);
120 snprintf(buf, sizeof(buf)-1, "%d", scale->w);
121 av_opt_set(scale, "w", buf, 0);
122 snprintf(buf, sizeof(buf)-1, "%d", scale->h);
123 av_opt_set(scale, "h", buf, 0);
126 av_opt_set(scale, "w", "iw", 0);
128 av_opt_set(scale, "h", "ih", 0);
130 av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n",
131 scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced);
135 if (scale->flags_str) {
136 const AVClass *class = sws_get_class();
137 const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
138 AV_OPT_SEARCH_FAKE_OBJ);
139 int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags);
149 static av_cold void uninit(AVFilterContext *ctx)
151 ScaleContext *scale = ctx->priv;
152 sws_freeContext(scale->sws);
153 sws_freeContext(scale->isws[0]);
154 sws_freeContext(scale->isws[1]);
156 av_dict_free(&scale->opts);
159 static int query_formats(AVFilterContext *ctx)
161 AVFilterFormats *formats;
162 enum AVPixelFormat pix_fmt;
165 if (ctx->inputs[0]) {
166 const AVPixFmtDescriptor *desc = NULL;
168 while ((desc = av_pix_fmt_desc_next(desc))) {
169 pix_fmt = av_pix_fmt_desc_get_id(desc);
170 if ((sws_isSupportedInput(pix_fmt) ||
171 sws_isSupportedEndiannessConversion(pix_fmt))
172 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
176 if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0)
179 if (ctx->outputs[0]) {
180 const AVPixFmtDescriptor *desc = NULL;
182 while ((desc = av_pix_fmt_desc_next(desc))) {
183 pix_fmt = av_pix_fmt_desc_get_id(desc);
184 if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 ||
185 sws_isSupportedEndiannessConversion(pix_fmt))
186 && (ret = ff_add_format(&formats, pix_fmt)) < 0) {
190 if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0)
197 static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace)
202 if (s && strstr(s, "bt709")) {
203 colorspace = AVCOL_SPC_BT709;
204 } else if (s && strstr(s, "fcc")) {
205 colorspace = AVCOL_SPC_FCC;
206 } else if (s && strstr(s, "smpte240m")) {
207 colorspace = AVCOL_SPC_SMPTE240M;
208 } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) {
209 colorspace = AVCOL_SPC_BT470BG;
210 } else if (s && strstr(s, "bt2020")) {
211 colorspace = AVCOL_SPC_BT2020_NCL;
214 if (colorspace < 1 || colorspace > 10 || colorspace == 8) {
215 colorspace = AVCOL_SPC_BT470BG;
218 return sws_getCoefficients(colorspace);
221 static int config_props(AVFilterLink *outlink)
223 AVFilterContext *ctx = outlink->src;
224 AVFilterLink *inlink0 = outlink->src->inputs[0];
225 AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ?
226 outlink->src->inputs[1] :
227 outlink->src->inputs[0];
228 enum AVPixelFormat outfmt = outlink->format;
229 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
230 ScaleContext *scale = ctx->priv;
234 if ((ret = ff_scale_eval_dimensions(ctx,
235 scale->w_expr, scale->h_expr,
240 ff_scale_adjust_dimensions(inlink, &w, &h,
241 scale->force_original_aspect_ratio,
242 scale->force_divisible_by);
244 if (w > INT_MAX || h > INT_MAX ||
245 (h * inlink->w) > INT_MAX ||
246 (w * inlink->h) > INT_MAX)
247 av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
252 /* TODO: make algorithm configurable */
254 scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL;
255 if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8;
256 scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL ||
257 av_pix_fmt_desc_get(outfmt)->flags & FF_PSEUDOPAL;
260 sws_freeContext(scale->sws);
262 sws_freeContext(scale->isws[0]);
264 sws_freeContext(scale->isws[1]);
265 scale->isws[0] = scale->isws[1] = scale->sws = NULL;
266 if (inlink0->w == outlink->w &&
267 inlink0->h == outlink->h &&
268 !scale->out_color_matrix &&
269 scale->in_range == scale->out_range &&
270 inlink0->format == outlink->format)
273 struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]};
276 for (i = 0; i < 3; i++) {
277 int in_v_chr_pos = scale->in_v_chr_pos, out_v_chr_pos = scale->out_v_chr_pos;
278 struct SwsContext **s = swscs[i];
279 *s = sws_alloc_context();
281 return AVERROR(ENOMEM);
283 av_opt_set_int(*s, "srcw", inlink0 ->w, 0);
284 av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0);
285 av_opt_set_int(*s, "src_format", inlink0->format, 0);
286 av_opt_set_int(*s, "dstw", outlink->w, 0);
287 av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0);
288 av_opt_set_int(*s, "dst_format", outfmt, 0);
289 av_opt_set_int(*s, "sws_flags", scale->flags, 0);
290 av_opt_set_int(*s, "param0", scale->param[0], 0);
291 av_opt_set_int(*s, "param1", scale->param[1], 0);
292 if (scale->in_range != AVCOL_RANGE_UNSPECIFIED)
293 av_opt_set_int(*s, "src_range",
294 scale->in_range == AVCOL_RANGE_JPEG, 0);
295 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
296 av_opt_set_int(*s, "dst_range",
297 scale->out_range == AVCOL_RANGE_JPEG, 0);
300 AVDictionaryEntry *e = NULL;
301 while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) {
302 if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0)
306 /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
307 * MPEG-2 chroma positions are used by convention
308 * XXX: support other 4:2:0 pixel formats */
309 if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) {
310 in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
313 if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) {
314 out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192;
317 av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0);
318 av_opt_set_int(*s, "src_v_chr_pos", in_v_chr_pos, 0);
319 av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0);
320 av_opt_set_int(*s, "dst_v_chr_pos", out_v_chr_pos, 0);
322 if ((ret = sws_init_context(*s, NULL, NULL)) < 0)
324 if (!scale->interlaced)
329 if (inlink0->sample_aspect_ratio.num){
330 outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio);
332 outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
334 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",
335 inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format),
336 inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den,
337 outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format),
338 outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den,
346 static int config_props_ref(AVFilterLink *outlink)
348 AVFilterLink *inlink = outlink->src->inputs[1];
350 outlink->w = inlink->w;
351 outlink->h = inlink->h;
352 outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
353 outlink->time_base = inlink->time_base;
354 outlink->frame_rate = inlink->frame_rate;
359 static int request_frame(AVFilterLink *outlink)
361 return ff_request_frame(outlink->src->inputs[0]);
364 static int request_frame_ref(AVFilterLink *outlink)
366 return ff_request_frame(outlink->src->inputs[1]);
369 static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field)
371 ScaleContext *scale = link->dst->priv;
372 const uint8_t *in[4];
374 int in_stride[4],out_stride[4];
377 for (i=0; i<4; i++) {
378 int vsub= ((i+1)&2) ? scale->vsub : 0;
379 in_stride[i] = cur_pic->linesize[i] * mul;
380 out_stride[i] = out_buf->linesize[i] * mul;
381 in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i];
382 out[i] = out_buf->data[i] + field * out_buf->linesize[i];
384 if (scale->input_is_pal)
385 in[1] = cur_pic->data[1];
386 if (scale->output_is_pal)
387 out[1] = out_buf->data[1];
389 return sws_scale(sws, in, in_stride, y/mul, h,
393 static int scale_frame(AVFilterLink *link, AVFrame *in, AVFrame **frame_out)
395 ScaleContext *scale = link->dst->priv;
396 AVFilterLink *outlink = link->dst->outputs[0];
398 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
403 if (in->colorspace == AVCOL_SPC_YCGCO)
404 av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n");
406 if ( in->width != link->w
407 || in->height != link->h
408 || in->format != link->format
409 || in->sample_aspect_ratio.den != link->sample_aspect_ratio.den || in->sample_aspect_ratio.num != link->sample_aspect_ratio.num) {
412 if (scale->eval_mode == EVAL_MODE_INIT) {
413 snprintf(buf, sizeof(buf)-1, "%d", outlink->w);
414 av_opt_set(scale, "w", buf, 0);
415 snprintf(buf, sizeof(buf)-1, "%d", outlink->h);
416 av_opt_set(scale, "h", buf, 0);
419 link->dst->inputs[0]->format = in->format;
420 link->dst->inputs[0]->w = in->width;
421 link->dst->inputs[0]->h = in->height;
423 link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
424 link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
426 if ((ret = config_props(outlink)) < 0)
435 scale->hsub = desc->log2_chroma_w;
436 scale->vsub = desc->log2_chroma_h;
438 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
441 return AVERROR(ENOMEM);
445 av_frame_copy_props(out, in);
446 out->width = outlink->w;
447 out->height = outlink->h;
449 if (scale->output_is_pal)
450 avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format);
452 in_range = in->color_range;
454 if ( scale->in_color_matrix
455 || scale->out_color_matrix
456 || scale-> in_range != AVCOL_RANGE_UNSPECIFIED
457 || in_range != AVCOL_RANGE_UNSPECIFIED
458 || scale->out_range != AVCOL_RANGE_UNSPECIFIED) {
459 int in_full, out_full, brightness, contrast, saturation;
460 const int *inv_table, *table;
462 sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full,
463 (int **)&table, &out_full,
464 &brightness, &contrast, &saturation);
466 if (scale->in_color_matrix)
467 inv_table = parse_yuv_type(scale->in_color_matrix, in->colorspace);
468 if (scale->out_color_matrix)
469 table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED);
470 else if (scale->in_color_matrix)
473 if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED)
474 in_full = (scale-> in_range == AVCOL_RANGE_JPEG);
475 else if (in_range != AVCOL_RANGE_UNSPECIFIED)
476 in_full = (in_range == AVCOL_RANGE_JPEG);
477 if (scale->out_range != AVCOL_RANGE_UNSPECIFIED)
478 out_full = (scale->out_range == AVCOL_RANGE_JPEG);
480 sws_setColorspaceDetails(scale->sws, inv_table, in_full,
482 brightness, contrast, saturation);
484 sws_setColorspaceDetails(scale->isws[0], inv_table, in_full,
486 brightness, contrast, saturation);
488 sws_setColorspaceDetails(scale->isws[1], inv_table, in_full,
490 brightness, contrast, saturation);
492 out->color_range = out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
495 av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
496 (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
497 (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
500 if (scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)) {
501 scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0);
502 scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1);
503 } else if (scale->nb_slices) {
504 int i, slice_h, slice_start, slice_end = 0;
505 const int nb_slices = FFMIN(scale->nb_slices, link->h);
506 for (i = 0; i < nb_slices; i++) {
507 slice_start = slice_end;
508 slice_end = (link->h * (i+1)) / nb_slices;
509 slice_h = slice_end - slice_start;
510 scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0);
513 scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0);
520 static int filter_frame(AVFilterLink *link, AVFrame *in)
522 AVFilterContext *ctx = link->dst;
523 AVFilterLink *outlink = ctx->outputs[0];
527 ret = scale_frame(link, in, &out);
529 return ff_filter_frame(outlink, out);
534 static int filter_frame_ref(AVFilterLink *link, AVFrame *in)
536 AVFilterLink *outlink = link->dst->outputs[1];
538 return ff_filter_frame(outlink, in);
541 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
542 char *res, int res_len, int flags)
544 ScaleContext *scale = ctx->priv;
547 if ( !strcmp(cmd, "width") || !strcmp(cmd, "w")
548 || !strcmp(cmd, "height") || !strcmp(cmd, "h")) {
550 int old_w = scale->w;
551 int old_h = scale->h;
552 AVFilterLink *outlink = ctx->outputs[0];
554 av_opt_set(scale, cmd, args, 0);
555 if ((ret = config_props(outlink)) < 0) {
560 ret = AVERROR(ENOSYS);
565 static const AVClass *child_class_next(const AVClass *prev)
567 return prev ? NULL : sws_get_class();
570 #define OFFSET(x) offsetof(ScaleContext, x)
571 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
573 static const AVOption scale_options[] = {
574 { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
575 { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
576 { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
577 { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS },
578 { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS },
579 { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.i64 = 0 }, -1, 1, FLAGS },
580 { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
581 { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS },
582 { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS, "color" },
583 { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS, "color"},
584 { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .str = "auto" }, 0, 0, FLAGS, "color" },
585 { "bt601", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt601" }, 0, 0, FLAGS, "color" },
586 { "bt470", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt470" }, 0, 0, FLAGS, "color" },
587 { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, { .str = "smpte170m" }, 0, 0, FLAGS, "color" },
588 { "bt709", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt709" }, 0, 0, FLAGS, "color" },
589 { "fcc", NULL, 0, AV_OPT_TYPE_CONST, { .str = "fcc" }, 0, 0, FLAGS, "color" },
590 { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, { .str = "smpte240m" }, 0, 0, FLAGS, "color" },
591 { "bt2020", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt2020" }, 0, 0, FLAGS, "color" },
592 { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
593 { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" },
594 { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
595 { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" },
596 { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
597 { "limited",NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
598 { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
599 { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
600 { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" },
601 { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" },
602 { "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 },
603 { "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 },
604 { "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 },
605 { "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 },
606 { "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" },
607 { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" },
608 { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" },
609 { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" },
610 { "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 },
611 { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
612 { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS },
613 { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
614 { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
615 { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
616 { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
620 static const AVClass scale_class = {
621 .class_name = "scale",
622 .item_name = av_default_item_name,
623 .option = scale_options,
624 .version = LIBAVUTIL_VERSION_INT,
625 .category = AV_CLASS_CATEGORY_FILTER,
626 .child_class_next = child_class_next,
629 static const AVFilterPad avfilter_vf_scale_inputs[] = {
632 .type = AVMEDIA_TYPE_VIDEO,
633 .filter_frame = filter_frame,
638 static const AVFilterPad avfilter_vf_scale_outputs[] = {
641 .type = AVMEDIA_TYPE_VIDEO,
642 .config_props = config_props,
647 AVFilter ff_vf_scale = {
649 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."),
650 .init_dict = init_dict,
652 .query_formats = query_formats,
653 .priv_size = sizeof(ScaleContext),
654 .priv_class = &scale_class,
655 .inputs = avfilter_vf_scale_inputs,
656 .outputs = avfilter_vf_scale_outputs,
657 .process_command = process_command,
660 static const AVClass scale2ref_class = {
661 .class_name = "scale2ref",
662 .item_name = av_default_item_name,
663 .option = scale_options,
664 .version = LIBAVUTIL_VERSION_INT,
665 .category = AV_CLASS_CATEGORY_FILTER,
666 .child_class_next = child_class_next,
669 static const AVFilterPad avfilter_vf_scale2ref_inputs[] = {
672 .type = AVMEDIA_TYPE_VIDEO,
673 .filter_frame = filter_frame,
677 .type = AVMEDIA_TYPE_VIDEO,
678 .filter_frame = filter_frame_ref,
683 static const AVFilterPad avfilter_vf_scale2ref_outputs[] = {
686 .type = AVMEDIA_TYPE_VIDEO,
687 .config_props = config_props,
688 .request_frame= request_frame,
692 .type = AVMEDIA_TYPE_VIDEO,
693 .config_props = config_props_ref,
694 .request_frame= request_frame_ref,
699 AVFilter ff_vf_scale2ref = {
701 .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."),
702 .init_dict = init_dict,
704 .query_formats = query_formats,
705 .priv_size = sizeof(ScaleContext),
706 .priv_class = &scale2ref_class,
707 .inputs = avfilter_vf_scale2ref_inputs,
708 .outputs = avfilter_vf_scale2ref_outputs,
709 .process_command = process_command,