/* * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> * Copyright (c) 2011 Stefano Sabatini * Copyright (c) 2018 Danil Iashchenko * * 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 */ #include "boxblur.h" static const char *const var_names[] = { "w", "h", "cw", "ch", "hsub", "vsub", NULL }; enum var_name { VAR_W, VAR_H, VAR_CW, VAR_CH, VAR_HSUB, VAR_VSUB, VARS_NB }; int ff_boxblur_eval_filter_params(AVFilterLink *inlink, FilterParam *luma_param, FilterParam *chroma_param, FilterParam *alpha_param) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); AVFilterContext *ctx = inlink->dst; int w = inlink->w, h = inlink->h; int cw, ch; double var_values[VARS_NB], res; char *expr; int ret; if (!luma_param->radius_expr) { av_log(ctx, AV_LOG_ERROR, "Luma radius expression is not set.\n"); return AVERROR(EINVAL); } /* fill missing params */ if (!chroma_param->radius_expr) { chroma_param->radius_expr = av_strdup(luma_param->radius_expr); if (!chroma_param->radius_expr) return AVERROR(ENOMEM); } if (chroma_param->power < 0) chroma_param->power = luma_param->power; if (!alpha_param->radius_expr) { alpha_param->radius_expr = av_strdup(luma_param->radius_expr); if (!alpha_param->radius_expr) return AVERROR(ENOMEM); } if (alpha_param->power < 0) alpha_param->power = luma_param->power; var_values[VAR_W] = inlink->w; var_values[VAR_H] = inlink->h; var_values[VAR_CW] = cw = w>>(desc->log2_chroma_w); var_values[VAR_CH] = ch = h>>(desc->log2_chroma_h); var_values[VAR_HSUB] = 1<<(desc->log2_chroma_w); var_values[VAR_VSUB] = 1<<(desc->log2_chroma_h); #define EVAL_RADIUS_EXPR(comp) \ expr = comp->radius_expr; \ ret = av_expr_parse_and_eval(&res, expr, var_names, var_values, \ NULL, NULL, NULL, NULL, NULL, 0, ctx); \ comp->radius = res; \ if (ret < 0) { \ av_log(NULL, AV_LOG_ERROR, \ "Error when evaluating " #comp " radius expression '%s'\n", expr); \ return ret; \ } EVAL_RADIUS_EXPR(luma_param); EVAL_RADIUS_EXPR(chroma_param); EVAL_RADIUS_EXPR(alpha_param); av_log(ctx, AV_LOG_VERBOSE, "luma_radius:%d luma_power:%d " "chroma_radius:%d chroma_power:%d " "alpha_radius:%d alpha_power:%d " "w:%d chroma_w:%d h:%d chroma_h:%d\n", luma_param ->radius, luma_param ->power, chroma_param->radius, chroma_param->power, alpha_param ->radius, alpha_param ->power, w, cw, h, ch); #define CHECK_RADIUS_VAL(w_, h_, comp) \ if (comp->radius < 0 || \ 2*comp->radius > FFMIN(w_, h_)) { \ av_log(ctx, AV_LOG_ERROR, \ "Invalid " #comp " radius value %d, must be >= 0 and <= %d\n", \ comp->radius, FFMIN(w_, h_)/2); \ return AVERROR(EINVAL); \ } CHECK_RADIUS_VAL(w, h, luma_param); CHECK_RADIUS_VAL(cw, ch, chroma_param); CHECK_RADIUS_VAL(w, h, alpha_param); return 0; }