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;
}
