diff options
Diffstat (limited to 'libavfilter/vf_scale.c')
| -rw-r--r-- | libavfilter/vf_scale.c | 368 |
1 files changed, 308 insertions, 60 deletions
diff --git a/libavfilter/vf_scale.c b/libavfilter/vf_scale.c index c47c6f3bc9..2e692cff5b 100644 --- a/libavfilter/vf_scale.c +++ b/libavfilter/vf_scale.c @@ -1,20 +1,20 @@ /* * Copyright (c) 2007 Bobby Bingham * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -35,42 +35,47 @@ #include "libavutil/internal.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" +#include "libavutil/parseutils.h" #include "libavutil/pixdesc.h" +#include "libavutil/imgutils.h" +#include "libavutil/avassert.h" #include "libswscale/swscale.h" static const char *const var_names[] = { - "PI", - "PHI", - "E", "in_w", "iw", "in_h", "ih", "out_w", "ow", "out_h", "oh", - "a", "dar", + "a", "sar", + "dar", "hsub", "vsub", + "ohsub", + "ovsub", NULL }; enum var_name { - VAR_PI, - VAR_PHI, - VAR_E, VAR_IN_W, VAR_IW, VAR_IN_H, VAR_IH, VAR_OUT_W, VAR_OW, VAR_OUT_H, VAR_OH, - VAR_A, VAR_DAR, + VAR_A, VAR_SAR, + VAR_DAR, VAR_HSUB, VAR_VSUB, + VAR_OHSUB, + VAR_OVSUB, VARS_NB }; typedef struct { const AVClass *class; struct SwsContext *sws; ///< software scaler context + struct SwsContext *isws[2]; ///< software scaler context for interlaced material + AVDictionary *opts; /** * New dimensions. Special values are: @@ -78,30 +83,79 @@ typedef struct { * -1 = keep original aspect */ int w, h; + char *size_str; unsigned int flags; ///sws flags int hsub, vsub; ///< chroma subsampling int slice_y; ///< top of current output slice int input_is_pal; ///< set to 1 if the input format is paletted + int output_is_pal; ///< set to 1 if the output format is paletted + int interlaced; char *w_expr; ///< width expression string char *h_expr; ///< height expression string char *flags_str; + + char *in_color_matrix; + char *out_color_matrix; + + int in_range; + int out_range; + + int out_h_chr_pos; + int out_v_chr_pos; + int in_h_chr_pos; + int in_v_chr_pos; + + int force_original_aspect_ratio; } ScaleContext; -static av_cold int init(AVFilterContext *ctx) +static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts) { ScaleContext *scale = ctx->priv; + int ret; + + if (scale->size_str && (scale->w_expr || scale->h_expr)) { + av_log(ctx, AV_LOG_ERROR, + "Size and width/height expressions cannot be set at the same time.\n"); + return AVERROR(EINVAL); + } + + if (scale->w_expr && !scale->h_expr) + FFSWAP(char *, scale->w_expr, scale->size_str); + + if (scale->size_str) { + char buf[32]; + if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) { + av_log(ctx, AV_LOG_ERROR, + "Invalid size '%s'\n", scale->size_str); + return ret; + } + snprintf(buf, sizeof(buf)-1, "%d", scale->w); + av_opt_set(scale, "w", buf, 0); + snprintf(buf, sizeof(buf)-1, "%d", scale->h); + av_opt_set(scale, "h", buf, 0); + } + if (!scale->w_expr) + av_opt_set(scale, "w", "iw", 0); + if (!scale->h_expr) + av_opt_set(scale, "h", "ih", 0); + + av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n", + scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced); + + scale->flags = 0; if (scale->flags_str) { const AVClass *class = sws_get_class(); const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0, AV_OPT_SEARCH_FAKE_OBJ); int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags); - if (ret < 0) return ret; } + scale->opts = *opts; + *opts = NULL; return 0; } @@ -110,7 +164,10 @@ static av_cold void uninit(AVFilterContext *ctx) { ScaleContext *scale = ctx->priv; sws_freeContext(scale->sws); + sws_freeContext(scale->isws[0]); + sws_freeContext(scale->isws[1]); scale->sws = NULL; + av_dict_free(&scale->opts); } static int query_formats(AVFilterContext *ctx) @@ -133,7 +190,7 @@ static int query_formats(AVFilterContext *ctx) if (ctx->outputs[0]) { formats = NULL; for (pix_fmt = 0; pix_fmt < AV_PIX_FMT_NB; pix_fmt++) - if ((sws_isSupportedOutput(pix_fmt) || + if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 || sws_isSupportedEndiannessConversion(pix_fmt)) && (ret = ff_add_format(&formats, pix_fmt)) < 0) { ff_formats_unref(&formats); @@ -145,20 +202,41 @@ static int query_formats(AVFilterContext *ctx) return 0; } +static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace) +{ + if (!s) + s = "bt601"; + + if (s && strstr(s, "bt709")) { + colorspace = AVCOL_SPC_BT709; + } else if (s && strstr(s, "fcc")) { + colorspace = AVCOL_SPC_FCC; + } else if (s && strstr(s, "smpte240m")) { + colorspace = AVCOL_SPC_SMPTE240M; + } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) { + colorspace = AVCOL_SPC_BT470BG; + } + + if (colorspace < 1 || colorspace > 7) { + colorspace = AVCOL_SPC_BT470BG; + } + + return sws_getCoefficients(colorspace); +} + static int config_props(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; AVFilterLink *inlink = outlink->src->inputs[0]; + enum AVPixelFormat outfmt = outlink->format; ScaleContext *scale = ctx->priv; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); + const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format); int64_t w, h; double var_values[VARS_NB], res; char *expr; int ret; - var_values[VAR_PI] = M_PI; - var_values[VAR_PHI] = M_PHI; - var_values[VAR_E] = M_E; var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w; var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h; var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN; @@ -169,6 +247,8 @@ static int config_props(AVFilterLink *outlink) var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR]; var_values[VAR_HSUB] = 1 << desc->log2_chroma_w; var_values[VAR_VSUB] = 1 << desc->log2_chroma_h; + var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w; + var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h; /* evaluate width and height */ av_expr_parse_and_eval(&res, (expr = scale->w_expr), @@ -207,6 +287,19 @@ static int config_props(AVFilterLink *outlink) if (h == -1) h = av_rescale(w, inlink->h, inlink->w); + if (scale->force_original_aspect_ratio) { + int tmp_w = av_rescale(h, inlink->w, inlink->h); + int tmp_h = av_rescale(w, inlink->h, inlink->w); + + if (scale->force_original_aspect_ratio == 1) { + w = FFMIN(tmp_w, w); + h = FFMIN(tmp_h, h); + } else { + w = FFMAX(tmp_w, w); + h = FFMAX(tmp_h, h); + } + } + if (w > INT_MAX || h > INT_MAX || (h * inlink->w) > INT_MAX || (w * inlink->h) > INT_MAX) @@ -216,49 +309,132 @@ static int config_props(AVFilterLink *outlink) outlink->h = h; /* TODO: make algorithm configurable */ - av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d fmt:%s flags:0x%0x\n", - inlink ->w, inlink ->h, av_get_pix_fmt_name(inlink->format), - outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format), - scale->flags); scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL; + if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8; + scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL || + av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL; if (scale->sws) sws_freeContext(scale->sws); + if (scale->isws[0]) + sws_freeContext(scale->isws[0]); + if (scale->isws[1]) + sws_freeContext(scale->isws[1]); + scale->isws[0] = scale->isws[1] = scale->sws = NULL; if (inlink->w == outlink->w && inlink->h == outlink->h && inlink->format == outlink->format) - scale->sws = NULL; + ; else { - scale->sws = sws_getContext(inlink ->w, inlink ->h, inlink ->format, - outlink->w, outlink->h, outlink->format, - scale->flags, NULL, NULL, NULL); - if (!scale->sws) - return AVERROR(EINVAL); - } + struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]}; + int i; + + for (i = 0; i < 3; i++) { + struct SwsContext **s = swscs[i]; + *s = sws_alloc_context(); + if (!*s) + return AVERROR(ENOMEM); + + if (scale->opts) { + AVDictionaryEntry *e = NULL; + + while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) { + if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0) + return ret; + } + } + av_opt_set_int(*s, "srcw", inlink ->w, 0); + av_opt_set_int(*s, "srch", inlink ->h >> !!i, 0); + av_opt_set_int(*s, "src_format", inlink->format, 0); + av_opt_set_int(*s, "dstw", outlink->w, 0); + av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0); + av_opt_set_int(*s, "dst_format", outfmt, 0); + av_opt_set_int(*s, "sws_flags", scale->flags, 0); - if (inlink->sample_aspect_ratio.num) - outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h*inlink->w, - outlink->w*inlink->h}, - inlink->sample_aspect_ratio); - else + av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0); + av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0); + av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0); + av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0); + + if ((ret = sws_init_context(*s, NULL, NULL)) < 0) + return ret; + if (!scale->interlaced) + break; + } + } + + if (inlink->sample_aspect_ratio.num){ + outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio); + } else outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; + 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", + inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format), + inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den, + outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format), + outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den, + scale->flags); return 0; fail: av_log(NULL, AV_LOG_ERROR, - "Error when evaluating the expression '%s'\n", expr); + "Error when evaluating the expression '%s'.\n" + "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n", + expr, scale->w_expr, scale->h_expr); return ret; } +static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field) +{ + ScaleContext *scale = link->dst->priv; + const uint8_t *in[4]; + uint8_t *out[4]; + int in_stride[4],out_stride[4]; + int i; + + for(i=0; i<4; i++){ + int vsub= ((i+1)&2) ? scale->vsub : 0; + in_stride[i] = cur_pic->linesize[i] * mul; + out_stride[i] = out_buf->linesize[i] * mul; + in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i]; + out[i] = out_buf->data[i] + field * out_buf->linesize[i]; + } + if(scale->input_is_pal) + in[1] = cur_pic->data[1]; + if(scale->output_is_pal) + out[1] = out_buf->data[1]; + + return sws_scale(sws, in, in_stride, y/mul, h, + out,out_stride); +} + static int filter_frame(AVFilterLink *link, AVFrame *in) { ScaleContext *scale = link->dst->priv; AVFilterLink *outlink = link->dst->outputs[0]; AVFrame *out; const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); + char buf[32]; + int in_range; + + if( in->width != link->w + || in->height != link->h + || in->format != link->format) { + int ret; + snprintf(buf, sizeof(buf)-1, "%d", outlink->w); + av_opt_set(scale, "w", buf, 0); + snprintf(buf, sizeof(buf)-1, "%d", outlink->h); + av_opt_set(scale, "h", buf, 0); + + link->dst->inputs[0]->format = in->format; + link->dst->inputs[0]->w = in->width; + link->dst->inputs[0]->h = in->height; + + if ((ret = config_props(outlink)) < 0) + return ret; + } if (!scale->sws) return ff_filter_frame(outlink, in); @@ -276,38 +452,114 @@ static int filter_frame(AVFilterLink *link, AVFrame *in) out->width = outlink->w; out->height = outlink->h; + if(scale->output_is_pal) + avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format); + + in_range = av_frame_get_color_range(in); + + if ( scale->in_color_matrix + || scale->out_color_matrix + || scale-> in_range != AVCOL_RANGE_UNSPECIFIED + || in_range != AVCOL_RANGE_UNSPECIFIED + || scale->out_range != AVCOL_RANGE_UNSPECIFIED) { + int in_full, out_full, brightness, contrast, saturation; + const int *inv_table, *table; + + sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full, + (int **)&table, &out_full, + &brightness, &contrast, &saturation); + + if (scale->in_color_matrix) + inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in)); + if (scale->out_color_matrix) + table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED); + + if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED) + in_full = (scale-> in_range == AVCOL_RANGE_JPEG); + else if (in_range != AVCOL_RANGE_UNSPECIFIED) + in_full = (in_range == AVCOL_RANGE_JPEG); + if (scale->out_range != AVCOL_RANGE_UNSPECIFIED) + out_full = (scale->out_range == AVCOL_RANGE_JPEG); + + sws_setColorspaceDetails(scale->sws, inv_table, in_full, + table, out_full, + brightness, contrast, saturation); + if (scale->isws[0]) + sws_setColorspaceDetails(scale->isws[0], inv_table, in_full, + table, out_full, + brightness, contrast, saturation); + if (scale->isws[1]) + sws_setColorspaceDetails(scale->isws[1], inv_table, in_full, + table, out_full, + brightness, contrast, saturation); + } + av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den, (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w, (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h, INT_MAX); - sws_scale(scale->sws, in->data, in->linesize, 0, in->height, - out->data, out->linesize); + if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){ + scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0); + scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1); + }else{ + scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0); + } av_frame_free(&in); return ff_filter_frame(outlink, out); } +static const AVClass *child_class_next(const AVClass *prev) +{ + return prev ? NULL : sws_get_class(); +} + #define OFFSET(x) offsetof(ScaleContext, x) -#define FLAGS AV_OPT_FLAG_VIDEO_PARAM -static const AVOption options[] = { - { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str = "iw" }, .flags = FLAGS }, - { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str = "ih" }, .flags = FLAGS }, +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption scale_options[] = { + { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, + { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS }, - { NULL }, + { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_INT, {.i64 = 0 }, -1, 1, FLAGS }, + { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS }, + { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS }, + { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS }, + { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS }, + { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" }, + { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" }, + { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" }, + { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, + { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, + { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" }, + { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" }, + { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, + { "in_v_chr_pos", "input vertical chroma position in luma grid/256" , OFFSET(in_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 512, FLAGS }, + { "in_h_chr_pos", "input horizontal chroma position in luma grid/256", OFFSET(in_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 512, FLAGS }, + { "out_v_chr_pos", "output vertical chroma position in luma grid/256" , OFFSET(out_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 512, FLAGS }, + { "out_h_chr_pos", "output horizontal chroma position in luma grid/256", OFFSET(out_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -1}, -1, 512, FLAGS }, + { "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" }, + { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" }, + { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" }, + { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" }, + { NULL } }; static const AVClass scale_class = { - .class_name = "scale", - .item_name = av_default_item_name, - .option = options, - .version = LIBAVUTIL_VERSION_INT, + .class_name = "scale", + .item_name = av_default_item_name, + .option = scale_options, + .version = LIBAVUTIL_VERSION_INT, + .child_class_next = child_class_next, }; static const AVFilterPad avfilter_vf_scale_inputs[] = { { - .name = "default", - .type = AVMEDIA_TYPE_VIDEO, + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, .filter_frame = filter_frame, }, { NULL } @@ -323,17 +575,13 @@ static const AVFilterPad avfilter_vf_scale_outputs[] = { }; AVFilter ff_vf_scale = { - .name = "scale", - .description = NULL_IF_CONFIG_SMALL("Scale the input video to width:height size and/or convert the image format."), - - .init = init, - .uninit = uninit, - + .name = "scale", + .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."), + .init_dict = init_dict, + .uninit = uninit, .query_formats = query_formats, - - .priv_size = sizeof(ScaleContext), - .priv_class = &scale_class, - - .inputs = avfilter_vf_scale_inputs, - .outputs = avfilter_vf_scale_outputs, + .priv_size = sizeof(ScaleContext), + .priv_class = &scale_class, + .inputs = avfilter_vf_scale_inputs, + .outputs = avfilter_vf_scale_outputs, }; |