| /* |
| * Copyright (c) 2007 Bobby Bingham |
| * |
| * This file is part of FFmpeg. |
| * |
| * 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. |
| * |
| * 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * scale video filter |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "scale_eval.h" |
| #include "video.h" |
| #include "libavutil/avstring.h" |
| #include "libavutil/eval.h" |
| #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[] = { |
| "in_w", "iw", |
| "in_h", "ih", |
| "out_w", "ow", |
| "out_h", "oh", |
| "a", |
| "sar", |
| "dar", |
| "hsub", |
| "vsub", |
| "ohsub", |
| "ovsub", |
| "n", |
| "t", |
| "pos", |
| "main_w", |
| "main_h", |
| "main_a", |
| "main_sar", |
| "main_dar", "mdar", |
| "main_hsub", |
| "main_vsub", |
| "main_n", |
| "main_t", |
| "main_pos", |
| NULL |
| }; |
| |
| enum var_name { |
| VAR_IN_W, VAR_IW, |
| VAR_IN_H, VAR_IH, |
| VAR_OUT_W, VAR_OW, |
| VAR_OUT_H, VAR_OH, |
| VAR_A, |
| VAR_SAR, |
| VAR_DAR, |
| VAR_HSUB, |
| VAR_VSUB, |
| VAR_OHSUB, |
| VAR_OVSUB, |
| VAR_N, |
| VAR_T, |
| VAR_POS, |
| VAR_S2R_MAIN_W, |
| VAR_S2R_MAIN_H, |
| VAR_S2R_MAIN_A, |
| VAR_S2R_MAIN_SAR, |
| VAR_S2R_MAIN_DAR, VAR_S2R_MDAR, |
| VAR_S2R_MAIN_HSUB, |
| VAR_S2R_MAIN_VSUB, |
| VAR_S2R_MAIN_N, |
| VAR_S2R_MAIN_T, |
| VAR_S2R_MAIN_POS, |
| VARS_NB |
| }; |
| |
| enum EvalMode { |
| EVAL_MODE_INIT, |
| EVAL_MODE_FRAME, |
| EVAL_MODE_NB |
| }; |
| |
| typedef struct ScaleContext { |
| 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: |
| * 0 = original width/height |
| * -1 = keep original aspect |
| * -N = try to keep aspect but make sure it is divisible by N |
| */ |
| int w, h; |
| char *size_str; |
| unsigned int flags; ///sws flags |
| double param[2]; // sws params |
| |
| 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 |
| AVExpr *w_pexpr; |
| AVExpr *h_pexpr; |
| double var_values[VARS_NB]; |
| |
| 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; |
| int force_divisible_by; |
| |
| int nb_slices; |
| |
| int eval_mode; ///< expression evaluation mode |
| |
| } ScaleContext; |
| |
| AVFilter ff_vf_scale2ref; |
| |
| static int config_props(AVFilterLink *outlink); |
| |
| static int check_exprs(AVFilterContext *ctx) |
| { |
| ScaleContext *scale = ctx->priv; |
| unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 }; |
| |
| if (!scale->w_pexpr && !scale->h_pexpr) |
| return AVERROR(EINVAL); |
| |
| if (scale->w_pexpr) |
| av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB); |
| if (scale->h_pexpr) |
| av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB); |
| |
| if (vars_w[VAR_OUT_W] || vars_w[VAR_OW]) { |
| av_log(ctx, AV_LOG_ERROR, "Width expression cannot be self-referencing: '%s'.\n", scale->w_expr); |
| return AVERROR(EINVAL); |
| } |
| |
| if (vars_h[VAR_OUT_H] || vars_h[VAR_OH]) { |
| av_log(ctx, AV_LOG_ERROR, "Height expression cannot be self-referencing: '%s'.\n", scale->h_expr); |
| return AVERROR(EINVAL); |
| } |
| |
| if ((vars_w[VAR_OUT_H] || vars_w[VAR_OH]) && |
| (vars_h[VAR_OUT_W] || vars_h[VAR_OW])) { |
| av_log(ctx, AV_LOG_WARNING, "Circular references detected for width '%s' and height '%s' - possibly invalid.\n", scale->w_expr, scale->h_expr); |
| } |
| |
| if (ctx->filter != &ff_vf_scale2ref && |
| (vars_w[VAR_S2R_MAIN_W] || vars_h[VAR_S2R_MAIN_W] || |
| vars_w[VAR_S2R_MAIN_H] || vars_h[VAR_S2R_MAIN_H] || |
| vars_w[VAR_S2R_MAIN_A] || vars_h[VAR_S2R_MAIN_A] || |
| vars_w[VAR_S2R_MAIN_SAR] || vars_h[VAR_S2R_MAIN_SAR] || |
| vars_w[VAR_S2R_MAIN_DAR] || vars_h[VAR_S2R_MAIN_DAR] || |
| vars_w[VAR_S2R_MDAR] || vars_h[VAR_S2R_MDAR] || |
| vars_w[VAR_S2R_MAIN_HSUB] || vars_h[VAR_S2R_MAIN_HSUB] || |
| vars_w[VAR_S2R_MAIN_VSUB] || vars_h[VAR_S2R_MAIN_VSUB] || |
| vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] || |
| vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] || |
| vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) { |
| av_log(ctx, AV_LOG_ERROR, "Expressions with scale2ref variables are not valid in scale filter.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (scale->eval_mode == EVAL_MODE_INIT && |
| (vars_w[VAR_N] || vars_h[VAR_N] || |
| vars_w[VAR_T] || vars_h[VAR_T] || |
| vars_w[VAR_POS] || vars_h[VAR_POS] || |
| vars_w[VAR_S2R_MAIN_N] || vars_h[VAR_S2R_MAIN_N] || |
| vars_w[VAR_S2R_MAIN_T] || vars_h[VAR_S2R_MAIN_T] || |
| vars_w[VAR_S2R_MAIN_POS] || vars_h[VAR_S2R_MAIN_POS]) ) { |
| av_log(ctx, AV_LOG_ERROR, "Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| return 0; |
| } |
| |
| static int scale_parse_expr(AVFilterContext *ctx, char *str_expr, AVExpr **pexpr_ptr, const char *var, const char *args) |
| { |
| ScaleContext *scale = ctx->priv; |
| int ret, is_inited = 0; |
| char *old_str_expr = NULL; |
| AVExpr *old_pexpr = NULL; |
| |
| if (str_expr) { |
| old_str_expr = av_strdup(str_expr); |
| if (!old_str_expr) |
| return AVERROR(ENOMEM); |
| av_opt_set(scale, var, args, 0); |
| } |
| |
| if (*pexpr_ptr) { |
| old_pexpr = *pexpr_ptr; |
| *pexpr_ptr = NULL; |
| is_inited = 1; |
| } |
| |
| ret = av_expr_parse(pexpr_ptr, args, var_names, |
| NULL, NULL, NULL, NULL, 0, ctx); |
| if (ret < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Cannot parse expression for %s: '%s'\n", var, args); |
| goto revert; |
| } |
| |
| ret = check_exprs(ctx); |
| if (ret < 0) |
| goto revert; |
| |
| if (is_inited && (ret = config_props(ctx->outputs[0])) < 0) |
| goto revert; |
| |
| av_expr_free(old_pexpr); |
| old_pexpr = NULL; |
| av_freep(&old_str_expr); |
| |
| return 0; |
| |
| revert: |
| av_expr_free(*pexpr_ptr); |
| *pexpr_ptr = NULL; |
| if (old_str_expr) { |
| av_opt_set(scale, var, old_str_expr, 0); |
| av_free(old_str_expr); |
| } |
| if (old_pexpr) |
| *pexpr_ptr = old_pexpr; |
| |
| return ret; |
| } |
| |
| 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); |
| |
| ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr); |
| if (ret < 0) |
| return ret; |
| |
| ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr); |
| if (ret < 0) |
| return ret; |
| |
| 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; |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| ScaleContext *scale = ctx->priv; |
| av_expr_free(scale->w_pexpr); |
| av_expr_free(scale->h_pexpr); |
| scale->w_pexpr = scale->h_pexpr = NULL; |
| 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) |
| { |
| AVFilterFormats *formats; |
| enum AVPixelFormat pix_fmt; |
| int ret; |
| |
| if (ctx->inputs[0]) { |
| const AVPixFmtDescriptor *desc = NULL; |
| formats = NULL; |
| while ((desc = av_pix_fmt_desc_next(desc))) { |
| pix_fmt = av_pix_fmt_desc_get_id(desc); |
| if ((sws_isSupportedInput(pix_fmt) || |
| sws_isSupportedEndiannessConversion(pix_fmt)) |
| && (ret = ff_add_format(&formats, pix_fmt)) < 0) { |
| return ret; |
| } |
| } |
| if ((ret = ff_formats_ref(formats, &ctx->inputs[0]->out_formats)) < 0) |
| return ret; |
| } |
| if (ctx->outputs[0]) { |
| const AVPixFmtDescriptor *desc = NULL; |
| formats = NULL; |
| while ((desc = av_pix_fmt_desc_next(desc))) { |
| pix_fmt = av_pix_fmt_desc_get_id(desc); |
| if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 || |
| sws_isSupportedEndiannessConversion(pix_fmt)) |
| && (ret = ff_add_format(&formats, pix_fmt)) < 0) { |
| return ret; |
| } |
| } |
| if ((ret = ff_formats_ref(formats, &ctx->outputs[0]->in_formats)) < 0) |
| return ret; |
| } |
| |
| 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; |
| } else if (s && strstr(s, "bt2020")) { |
| colorspace = AVCOL_SPC_BT2020_NCL; |
| } |
| |
| if (colorspace < 1 || colorspace > 10 || colorspace == 8) { |
| colorspace = AVCOL_SPC_BT470BG; |
| } |
| |
| return sws_getCoefficients(colorspace); |
| } |
| |
| static int scale_eval_dimensions(AVFilterContext *ctx) |
| { |
| ScaleContext *scale = ctx->priv; |
| const char scale2ref = ctx->filter == &ff_vf_scale2ref; |
| const AVFilterLink *inlink = scale2ref ? ctx->inputs[1] : ctx->inputs[0]; |
| const AVFilterLink *outlink = ctx->outputs[0]; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format); |
| char *expr; |
| int eval_w, eval_h; |
| int ret; |
| double res; |
| const AVPixFmtDescriptor *main_desc; |
| const AVFilterLink *main_link; |
| |
| if (scale2ref) { |
| main_link = ctx->inputs[0]; |
| main_desc = av_pix_fmt_desc_get(main_link->format); |
| } |
| |
| scale->var_values[VAR_IN_W] = scale->var_values[VAR_IW] = inlink->w; |
| scale->var_values[VAR_IN_H] = scale->var_values[VAR_IH] = inlink->h; |
| scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = NAN; |
| scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = NAN; |
| scale->var_values[VAR_A] = (double) inlink->w / inlink->h; |
| scale->var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? |
| (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1; |
| scale->var_values[VAR_DAR] = scale->var_values[VAR_A] * scale->var_values[VAR_SAR]; |
| scale->var_values[VAR_HSUB] = 1 << desc->log2_chroma_w; |
| scale->var_values[VAR_VSUB] = 1 << desc->log2_chroma_h; |
| scale->var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w; |
| scale->var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h; |
| |
| if (scale2ref) { |
| scale->var_values[VAR_S2R_MAIN_W] = main_link->w; |
| scale->var_values[VAR_S2R_MAIN_H] = main_link->h; |
| scale->var_values[VAR_S2R_MAIN_A] = (double) main_link->w / main_link->h; |
| scale->var_values[VAR_S2R_MAIN_SAR] = main_link->sample_aspect_ratio.num ? |
| (double) main_link->sample_aspect_ratio.num / main_link->sample_aspect_ratio.den : 1; |
| scale->var_values[VAR_S2R_MAIN_DAR] = scale->var_values[VAR_S2R_MDAR] = |
| scale->var_values[VAR_S2R_MAIN_A] * scale->var_values[VAR_S2R_MAIN_SAR]; |
| scale->var_values[VAR_S2R_MAIN_HSUB] = 1 << main_desc->log2_chroma_w; |
| scale->var_values[VAR_S2R_MAIN_VSUB] = 1 << main_desc->log2_chroma_h; |
| } |
| |
| res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL); |
| eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res; |
| |
| res = av_expr_eval(scale->h_pexpr, scale->var_values, NULL); |
| if (isnan(res)) { |
| expr = scale->h_expr; |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| eval_h = scale->var_values[VAR_OUT_H] = scale->var_values[VAR_OH] = (int) res == 0 ? inlink->h : (int) res; |
| |
| res = av_expr_eval(scale->w_pexpr, scale->var_values, NULL); |
| if (isnan(res)) { |
| expr = scale->w_expr; |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| eval_w = scale->var_values[VAR_OUT_W] = scale->var_values[VAR_OW] = (int) res == 0 ? inlink->w : (int) res; |
| |
| scale->w = eval_w; |
| scale->h = eval_h; |
| |
| return 0; |
| |
| fail: |
| av_log(ctx, AV_LOG_ERROR, |
| "Error when evaluating the expression '%s'.\n", expr); |
| return ret; |
| } |
| |
| static int config_props(AVFilterLink *outlink) |
| { |
| AVFilterContext *ctx = outlink->src; |
| AVFilterLink *inlink0 = outlink->src->inputs[0]; |
| AVFilterLink *inlink = ctx->filter == &ff_vf_scale2ref ? |
| outlink->src->inputs[1] : |
| outlink->src->inputs[0]; |
| enum AVPixelFormat outfmt = outlink->format; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| ScaleContext *scale = ctx->priv; |
| int ret; |
| |
| if ((ret = scale_eval_dimensions(ctx)) < 0) |
| goto fail; |
| |
| ff_scale_adjust_dimensions(inlink, &scale->w, &scale->h, |
| scale->force_original_aspect_ratio, |
| scale->force_divisible_by); |
| |
| if (scale->w > INT_MAX || |
| scale->h > INT_MAX || |
| (scale->h * inlink->w) > INT_MAX || |
| (scale->w * inlink->h) > INT_MAX) |
| av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n"); |
| |
| outlink->w = scale->w; |
| outlink->h = scale->h; |
| |
| /* TODO: make algorithm configurable */ |
| |
| scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL; |
| 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 & FF_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 (inlink0->w == outlink->w && |
| inlink0->h == outlink->h && |
| !scale->out_color_matrix && |
| scale->in_range == scale->out_range && |
| inlink0->format == outlink->format) |
| ; |
| else { |
| struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]}; |
| int i; |
| |
| for (i = 0; i < 3; i++) { |
| int in_v_chr_pos = scale->in_v_chr_pos, out_v_chr_pos = scale->out_v_chr_pos; |
| struct SwsContext **s = swscs[i]; |
| *s = sws_alloc_context(); |
| if (!*s) |
| return AVERROR(ENOMEM); |
| |
| av_opt_set_int(*s, "srcw", inlink0 ->w, 0); |
| av_opt_set_int(*s, "srch", inlink0 ->h >> !!i, 0); |
| av_opt_set_int(*s, "src_format", inlink0->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); |
| av_opt_set_int(*s, "param0", scale->param[0], 0); |
| av_opt_set_int(*s, "param1", scale->param[1], 0); |
| if (scale->in_range != AVCOL_RANGE_UNSPECIFIED) |
| av_opt_set_int(*s, "src_range", |
| scale->in_range == AVCOL_RANGE_JPEG, 0); |
| if (scale->out_range != AVCOL_RANGE_UNSPECIFIED) |
| av_opt_set_int(*s, "dst_range", |
| scale->out_range == AVCOL_RANGE_JPEG, 0); |
| |
| 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; |
| } |
| } |
| /* Override YUV420P default settings to have the correct (MPEG-2) chroma positions |
| * MPEG-2 chroma positions are used by convention |
| * XXX: support other 4:2:0 pixel formats */ |
| if (inlink0->format == AV_PIX_FMT_YUV420P && scale->in_v_chr_pos == -513) { |
| in_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192; |
| } |
| |
| if (outlink->format == AV_PIX_FMT_YUV420P && scale->out_v_chr_pos == -513) { |
| out_v_chr_pos = (i == 0) ? 128 : (i == 1) ? 64 : 192; |
| } |
| |
| av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0); |
| av_opt_set_int(*s, "src_v_chr_pos", 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", out_v_chr_pos, 0); |
| |
| if ((ret = sws_init_context(*s, NULL, NULL)) < 0) |
| return ret; |
| if (!scale->interlaced) |
| break; |
| } |
| } |
| |
| if (inlink0->sample_aspect_ratio.num){ |
| outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink0->w, outlink->w * inlink0->h}, inlink0->sample_aspect_ratio); |
| } else |
| outlink->sample_aspect_ratio = inlink0->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: |
| return ret; |
| } |
| |
| static int config_props_ref(AVFilterLink *outlink) |
| { |
| AVFilterLink *inlink = outlink->src->inputs[1]; |
| |
| outlink->w = inlink->w; |
| outlink->h = inlink->h; |
| outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; |
| outlink->time_base = inlink->time_base; |
| outlink->frame_rate = inlink->frame_rate; |
| |
| return 0; |
| } |
| |
| static int request_frame(AVFilterLink *outlink) |
| { |
| return ff_request_frame(outlink->src->inputs[0]); |
| } |
| |
| static int request_frame_ref(AVFilterLink *outlink) |
| { |
| return ff_request_frame(outlink->src->inputs[1]); |
| } |
| |
| 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); |
| } |
| |
| #define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts) * av_q2d(tb)) |
| |
| static int scale_frame(AVFilterLink *link, AVFrame *in, AVFrame **frame_out) |
| { |
| AVFilterContext *ctx = link->dst; |
| ScaleContext *scale = ctx->priv; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out; |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); |
| char buf[32]; |
| int in_range; |
| int frame_changed; |
| |
| *frame_out = NULL; |
| if (in->colorspace == AVCOL_SPC_YCGCO) |
| av_log(link->dst, AV_LOG_WARNING, "Detected unsupported YCgCo colorspace.\n"); |
| |
| frame_changed = in->width != link->w || |
| in->height != link->h || |
| in->format != link->format || |
| in->sample_aspect_ratio.den != link->sample_aspect_ratio.den || |
| in->sample_aspect_ratio.num != link->sample_aspect_ratio.num; |
| |
| if (scale->eval_mode == EVAL_MODE_FRAME || frame_changed) { |
| int ret; |
| unsigned vars_w[VARS_NB] = { 0 }, vars_h[VARS_NB] = { 0 }; |
| |
| av_expr_count_vars(scale->w_pexpr, vars_w, VARS_NB); |
| av_expr_count_vars(scale->h_pexpr, vars_h, VARS_NB); |
| |
| if (scale->eval_mode == EVAL_MODE_FRAME && |
| !frame_changed && |
| ctx->filter != &ff_vf_scale2ref && |
| !(vars_w[VAR_N] || vars_w[VAR_T] || vars_w[VAR_POS]) && |
| !(vars_h[VAR_N] || vars_h[VAR_T] || vars_h[VAR_POS]) && |
| scale->w && scale->h) |
| goto scale; |
| |
| if (scale->eval_mode == EVAL_MODE_INIT) { |
| 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); |
| |
| ret = scale_parse_expr(ctx, NULL, &scale->w_pexpr, "width", scale->w_expr); |
| if (ret < 0) |
| return ret; |
| |
| ret = scale_parse_expr(ctx, NULL, &scale->h_pexpr, "height", scale->h_expr); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (ctx->filter == &ff_vf_scale2ref) { |
| scale->var_values[VAR_S2R_MAIN_N] = link->frame_count_out; |
| scale->var_values[VAR_S2R_MAIN_T] = TS2T(in->pts, link->time_base); |
| scale->var_values[VAR_S2R_MAIN_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos; |
| } else { |
| scale->var_values[VAR_N] = link->frame_count_out; |
| scale->var_values[VAR_T] = TS2T(in->pts, link->time_base); |
| scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos; |
| } |
| |
| link->dst->inputs[0]->format = in->format; |
| link->dst->inputs[0]->w = in->width; |
| link->dst->inputs[0]->h = in->height; |
| |
| link->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den; |
| link->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num; |
| |
| if ((ret = config_props(outlink)) < 0) |
| return ret; |
| } |
| |
| scale: |
| if (!scale->sws) { |
| *frame_out = in; |
| return 0; |
| } |
| |
| scale->hsub = desc->log2_chroma_w; |
| scale->vsub = desc->log2_chroma_h; |
| |
| out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!out) { |
| av_frame_free(&in); |
| return AVERROR(ENOMEM); |
| } |
| *frame_out = out; |
| |
| av_frame_copy_props(out, 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 = in->color_range; |
| |
| 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, in->colorspace); |
| if (scale->out_color_matrix) |
| table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED); |
| else if (scale->in_color_matrix) |
| table = inv_table; |
| |
| 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); |
| |
| out->color_range = out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG; |
| } |
| |
| 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); |
| |
| 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 if (scale->nb_slices) { |
| int i, slice_h, slice_start, slice_end = 0; |
| const int nb_slices = FFMIN(scale->nb_slices, link->h); |
| for (i = 0; i < nb_slices; i++) { |
| slice_start = slice_end; |
| slice_end = (link->h * (i+1)) / nb_slices; |
| slice_h = slice_end - slice_start; |
| scale_slice(link, out, in, scale->sws, slice_start, slice_h, 1, 0); |
| } |
| } else { |
| scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0); |
| } |
| |
| av_frame_free(&in); |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *link, AVFrame *in) |
| { |
| AVFilterContext *ctx = link->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFrame *out; |
| int ret; |
| |
| ret = scale_frame(link, in, &out); |
| if (out) |
| return ff_filter_frame(outlink, out); |
| |
| return ret; |
| } |
| |
| static int filter_frame_ref(AVFilterLink *link, AVFrame *in) |
| { |
| ScaleContext *scale = link->dst->priv; |
| AVFilterLink *outlink = link->dst->outputs[1]; |
| int frame_changed; |
| |
| frame_changed = in->width != link->w || |
| in->height != link->h || |
| in->format != link->format || |
| in->sample_aspect_ratio.den != link->sample_aspect_ratio.den || |
| in->sample_aspect_ratio.num != link->sample_aspect_ratio.num; |
| |
| if (frame_changed) { |
| link->format = in->format; |
| link->w = in->width; |
| link->h = in->height; |
| link->sample_aspect_ratio.num = in->sample_aspect_ratio.num; |
| link->sample_aspect_ratio.den = in->sample_aspect_ratio.den; |
| |
| config_props_ref(outlink); |
| } |
| |
| if (scale->eval_mode == EVAL_MODE_FRAME) { |
| scale->var_values[VAR_N] = link->frame_count_out; |
| scale->var_values[VAR_T] = TS2T(in->pts, link->time_base); |
| scale->var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos; |
| } |
| |
| return ff_filter_frame(outlink, in); |
| } |
| |
| static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, |
| char *res, int res_len, int flags) |
| { |
| ScaleContext *scale = ctx->priv; |
| char *str_expr; |
| AVExpr **pexpr_ptr; |
| int ret, w, h; |
| |
| w = !strcmp(cmd, "width") || !strcmp(cmd, "w"); |
| h = !strcmp(cmd, "height") || !strcmp(cmd, "h"); |
| |
| if (w || h) { |
| str_expr = w ? scale->w_expr : scale->h_expr; |
| pexpr_ptr = w ? &scale->w_pexpr : &scale->h_pexpr; |
| |
| ret = scale_parse_expr(ctx, str_expr, pexpr_ptr, cmd, args); |
| } else |
| ret = AVERROR(ENOSYS); |
| |
| if (ret < 0) |
| av_log(ctx, AV_LOG_ERROR, "Failed to process command. Continuing with existing parameters.\n"); |
| |
| return ret; |
| } |
| |
| 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|AV_OPT_FLAG_FILTERING_PARAM |
| #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM |
| |
| static const AVOption scale_options[] = { |
| { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS }, |
| { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS }, |
| { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS }, |
| { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = TFLAGS }, |
| { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS }, |
| { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_BOOL, {.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, "color" }, |
| { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS, "color"}, |
| { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .str = "auto" }, 0, 0, FLAGS, "color" }, |
| { "bt601", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt601" }, 0, 0, FLAGS, "color" }, |
| { "bt470", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt470" }, 0, 0, FLAGS, "color" }, |
| { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, { .str = "smpte170m" }, 0, 0, FLAGS, "color" }, |
| { "bt709", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt709" }, 0, 0, FLAGS, "color" }, |
| { "fcc", NULL, 0, AV_OPT_TYPE_CONST, { .str = "fcc" }, 0, 0, FLAGS, "color" }, |
| { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, { .str = "smpte240m" }, 0, 0, FLAGS, "color" }, |
| { "bt2020", NULL, 0, AV_OPT_TYPE_CONST, { .str = "bt2020" }, 0, 0, FLAGS, "color" }, |
| { "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" }, |
| { "unknown", 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" }, |
| { "limited",NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 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 = -513}, -513, 512, FLAGS }, |
| { "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 }, |
| { "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 }, |
| { "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 }, |
| { "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" }, |
| { "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 }, |
| { "param0", "Scaler param 0", OFFSET(param[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS }, |
| { "param1", "Scaler param 1", OFFSET(param[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, FLAGS }, |
| { "nb_slices", "set the number of slices (debug purpose only)", OFFSET(nb_slices), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, |
| { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" }, |
| { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" }, |
| { "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" }, |
| { NULL } |
| }; |
| |
| static const AVClass scale_class = { |
| .class_name = "scale", |
| .item_name = av_default_item_name, |
| .option = scale_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| .category = AV_CLASS_CATEGORY_FILTER, |
| .child_class_next = child_class_next, |
| }; |
| |
| static const AVFilterPad avfilter_vf_scale_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_scale_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_props, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_scale = { |
| .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, |
| .process_command = process_command, |
| }; |
| |
| static const AVClass scale2ref_class = { |
| .class_name = "scale2ref", |
| .item_name = av_default_item_name, |
| .option = scale_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| .category = AV_CLASS_CATEGORY_FILTER, |
| .child_class_next = child_class_next, |
| }; |
| |
| static const AVFilterPad avfilter_vf_scale2ref_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { |
| .name = "ref", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame_ref, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_scale2ref_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_props, |
| .request_frame= request_frame, |
| }, |
| { |
| .name = "ref", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_props_ref, |
| .request_frame= request_frame_ref, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_scale2ref = { |
| .name = "scale2ref", |
| .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format to the given reference."), |
| .init_dict = init_dict, |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .priv_size = sizeof(ScaleContext), |
| .priv_class = &scale2ref_class, |
| .inputs = avfilter_vf_scale2ref_inputs, |
| .outputs = avfilter_vf_scale2ref_outputs, |
| .process_command = process_command, |
| }; |
