static int config_input(AVFilterLink *inlink) { AVFilterContext *ctx = inlink->dst; BoxBlurContext *boxblur = ctx->priv; const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[inlink->format]; int w = inlink->w, h = inlink->h; int cw, ch; double var_values[VARS_NB], res; char *expr; int ret; if (!(boxblur->temp[0] = av_malloc(FFMAX(w, h))) || !(boxblur->temp[1] = av_malloc(FFMAX(w, h)))) return AVERROR(ENOMEM); boxblur->hsub = desc->log2_chroma_w; boxblur->vsub = desc->log2_chroma_h; var_values[VAR_W] = inlink->w; var_values[VAR_H] = inlink->h; var_values[VAR_CW] = cw = w>>boxblur->hsub; var_values[VAR_CH] = ch = h>>boxblur->vsub; var_values[VAR_HSUB] = 1<<boxblur->hsub; var_values[VAR_VSUB] = 1<<boxblur->vsub; #define EVAL_RADIUS_EXPR(comp) \ expr = boxblur->comp##_radius_expr; \ ret = av_expr_parse_and_eval(&res, expr, var_names, var_values, \ NULL, NULL, NULL, NULL, NULL, 0, ctx); \ boxblur->comp##_param.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); EVAL_RADIUS_EXPR(chroma); EVAL_RADIUS_EXPR(alpha); av_log(ctx, AV_LOG_INFO, "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", boxblur->luma_param .radius, boxblur->luma_param .power, boxblur->chroma_param.radius, boxblur->chroma_param.power, boxblur->alpha_param .radius, boxblur->alpha_param .power, w, cw, h, ch); #define CHECK_RADIUS_VAL(w_, h_, comp) \ if (boxblur->comp##_param.radius < 0 || \ 2*boxblur->comp##_param.radius > FFMIN(w_, h_)) { \ av_log(ctx, AV_LOG_ERROR, \ "Invalid " #comp " radius value %d, must be >= 0 and <= %d\n", \ boxblur->comp##_param.radius, FFMIN(w_, h_)/2); \ return AVERROR(EINVAL); \ } CHECK_RADIUS_VAL(w, h, luma); CHECK_RADIUS_VAL(cw, ch, chroma); CHECK_RADIUS_VAL(w, h, alpha); boxblur->radius[Y] = boxblur->luma_param.radius; boxblur->radius[U] = boxblur->radius[V] = boxblur->chroma_param.radius; boxblur->radius[A] = boxblur->alpha_param.radius; boxblur->power[Y] = boxblur->luma_param.power; boxblur->power[U] = boxblur->power[V] = boxblur->chroma_param.power; boxblur->power[A] = boxblur->alpha_param.power; return 0; }
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; }