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/* |
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* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> |
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* Copyright (c) 2011 Stefano Sabatini |
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* Copyright (c) 2018 Danil Iashchenko |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "boxblur.h" |
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static const char *const var_names[] = { |
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"w", |
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"h", |
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"cw", |
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"ch", |
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"hsub", |
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"vsub", |
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NULL |
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}; |
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enum var_name { |
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VAR_W, |
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VAR_H, |
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VAR_CW, |
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VAR_CH, |
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VAR_HSUB, |
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VAR_VSUB, |
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VARS_NB |
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}; |
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int ff_boxblur_eval_filter_params(AVFilterLink *inlink, |
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FilterParam *luma_param, |
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FilterParam *chroma_param, |
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FilterParam *alpha_param) |
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{ |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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AVFilterContext *ctx = inlink->dst; |
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int w = inlink->w, h = inlink->h; |
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int cw, ch; |
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double var_values[VARS_NB], res; |
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char *expr; |
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int ret; |
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if (!luma_param->radius_expr) { |
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av_log(ctx, AV_LOG_ERROR, "Luma radius expression is not set.\n"); |
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return AVERROR(EINVAL); |
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} |
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/* fill missing params */ |
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if (!chroma_param->radius_expr) { |
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chroma_param->radius_expr = av_strdup(luma_param->radius_expr); |
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if (!chroma_param->radius_expr) |
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return AVERROR(ENOMEM); |
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} |
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if (chroma_param->power < 0) |
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chroma_param->power = luma_param->power; |
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if (!alpha_param->radius_expr) { |
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alpha_param->radius_expr = av_strdup(luma_param->radius_expr); |
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if (!alpha_param->radius_expr) |
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return AVERROR(ENOMEM); |
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} |
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if (alpha_param->power < 0) |
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alpha_param->power = luma_param->power; |
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var_values[VAR_W] = inlink->w; |
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var_values[VAR_H] = inlink->h; |
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var_values[VAR_CW] = cw = w>>(desc->log2_chroma_w); |
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var_values[VAR_CH] = ch = h>>(desc->log2_chroma_h); |
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var_values[VAR_HSUB] = 1<<(desc->log2_chroma_w); |
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var_values[VAR_VSUB] = 1<<(desc->log2_chroma_h); |
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#define EVAL_RADIUS_EXPR(comp) \ |
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expr = comp->radius_expr; \ |
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ret = av_expr_parse_and_eval(&res, expr, var_names, var_values, \ |
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NULL, NULL, NULL, NULL, NULL, 0, ctx); \ |
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comp->radius = res; \ |
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if (ret < 0) { \ |
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av_log(ctx, AV_LOG_ERROR, \ |
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"Error when evaluating " #comp " radius expression '%s'\n", expr); \ |
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return ret; \ |
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} |
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EVAL_RADIUS_EXPR(luma_param); |
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EVAL_RADIUS_EXPR(chroma_param); |
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EVAL_RADIUS_EXPR(alpha_param); |
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av_log(ctx, AV_LOG_VERBOSE, |
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"luma_radius:%d luma_power:%d " |
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"chroma_radius:%d chroma_power:%d " |
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"alpha_radius:%d alpha_power:%d " |
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"w:%d chroma_w:%d h:%d chroma_h:%d\n", |
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luma_param ->radius, luma_param ->power, |
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chroma_param->radius, chroma_param->power, |
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alpha_param ->radius, alpha_param ->power, |
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w, cw, h, ch); |
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#define CHECK_RADIUS_VAL(w_, h_, comp) \ |
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if (comp->radius < 0 || \ |
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2*comp->radius > FFMIN(w_, h_)) { \ |
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av_log(ctx, AV_LOG_ERROR, \ |
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"Invalid " #comp " radius value %d, must be >= 0 and <= %d\n", \ |
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comp->radius, FFMIN(w_, h_)/2); \ |
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return AVERROR(EINVAL); \ |
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} |
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✓✗✗✓
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CHECK_RADIUS_VAL(w, h, luma_param); |
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✓✗✗✓
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CHECK_RADIUS_VAL(cw, ch, chroma_param); |
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✓✗✗✓
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CHECK_RADIUS_VAL(w, h, alpha_param); |
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return 0; |
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} |