lavfi/hue: simplify parsing by making use of option shorthands

libavfilter/vf_hue.c

@@ -130,14 +130,10 @@ static inline void compute_sin_and_cos(HueContext *hue)
 static inline int set_options(AVFilterContext *ctx, const char *args)
 {
     HueContext *hue = ctx->priv;
-    int n, ret;
-    char c1 = 0, c2 = 0;
+    int ret;
     char   *old_hue_expr,  *old_hue_deg_expr,  *old_saturation_expr;
     AVExpr *old_hue_pexpr, *old_hue_deg_pexpr, *old_saturation_pexpr;
-
-    if (args) {
-        /* named options syntax */
-        if (strchr(args, '=')) {
+    static const char *shorthand[] = { "h", "s", NULL };
             old_hue_expr        = hue->hue_expr;
             old_hue_deg_expr    = hue->hue_deg_expr;
             old_saturation_expr = hue->saturation_expr;
@@ -150,7 +146,7 @@ static inline int set_options(AVFilterContext *ctx, const char *args)
             hue->hue_deg_expr = NULL;
             hue->saturation_expr = NULL;
 
-            if ((ret = av_set_options_string(hue, args, "=", ":")) < 0)
+            if ((ret = av_opt_set_from_string(hue, args, shorthand, "=", ":")) < 0)
                 return ret;
             if (hue->hue_expr && hue->hue_deg_expr) {
                 av_log(ctx, AV_LOG_ERROR,
@@ -172,33 +168,6 @@ static inline int set_options(AVFilterContext *ctx, const char *args)
                    "H_expr:%s h_deg_expr:%s s_expr:%s\n",
                    hue->hue_expr, hue->hue_deg_expr, hue->saturation_expr);
 
-        /* compatibility h:s syntax */
-        } else {
-            n = sscanf(args, "%f%c%f%c", &hue->hue_deg, &c1, &hue->saturation, &c2);
-            if (n != 1 && (n != 3 || c1 != ':')) {
-                av_log(ctx, AV_LOG_ERROR,
-                       "Invalid syntax for argument '%s': "
-                       "must be in the form 'hue[:saturation]'\n", args);
-                return AVERROR(EINVAL);
-            }
-
-            if (hue->saturation < SAT_MIN_VAL || hue->saturation > SAT_MAX_VAL) {
-                av_log(ctx, AV_LOG_ERROR,
-                       "Invalid value for saturation %0.1f: "
-                       "must be included between range %d and +%d\n",
-                       hue->saturation, SAT_MIN_VAL, SAT_MAX_VAL);
-                return AVERROR(EINVAL);
-            }
-
-            hue->hue = hue->hue_deg * M_PI / 180;
-            hue->flat_syntax = 1;
-
-            av_log(ctx, AV_LOG_VERBOSE,
-                   "H:%0.1f h:%0.1f s:%0.1f\n",
-                   hue->hue, hue->hue_deg, hue->saturation);
-        }
-    }
-
     compute_sin_and_cos(hue);
 
     return 0;