lavfi/life: make use of AV_OPT_TYPE_VIDEO_RATE

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/vsrc_life.c

@@ -60,8 +60,7 @@ typedef struct {
     uint16_t stay_rule;         ///< encode the behavior for filled cells
     uint16_t born_rule;         ///< encode the behavior for empty cells
     uint64_t pts;
-    AVRational time_base;
-    char *rate;                 ///< video frame rate
+    AVRational frame_rate;
     double   random_fill_ratio;
     uint32_t random_seed;
     int stitch;
@@ -85,8 +84,8 @@ static const AVOption life_options[] = {
     { "f",        "set source file",  OFFSET(filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
     { "size",     "set video size",   OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS },
     { "s",        "set video size",   OFFSET(w),        AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, FLAGS },
-    { "rate",     "set video rate",   OFFSET(rate),     AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, FLAGS },
-    { "r",        "set video rate",   OFFSET(rate),     AV_OPT_TYPE_STRING, {.str = "25"}, 0, 0, FLAGS },
+    { "rate",     "set video rate",   OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
+    { "r",        "set video rate",   OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, FLAGS },
     { "rule",     "set rule",         OFFSET(rule_str), AV_OPT_TYPE_STRING, {.str = "B3/S23"}, CHAR_MIN, CHAR_MAX, FLAGS },
     { "random_fill_ratio", "set fill ratio for filling initial grid randomly", OFFSET(random_fill_ratio), AV_OPT_TYPE_DOUBLE, {.dbl=1/M_PHI}, 0, 1, FLAGS },
     { "ratio",             "set fill ratio for filling initial grid randomly", OFFSET(random_fill_ratio), AV_OPT_TYPE_DOUBLE, {.dbl=1/M_PHI}, 0, 1, FLAGS },
@@ -224,7 +223,6 @@ static int init_pattern_from_file(AVFilterContext *ctx)
 static int init(AVFilterContext *ctx, const char *args)
 {
     LifeContext *life = ctx->priv;
-    AVRational frame_rate;
     int ret;
 
     life->class = &life_class;
@@ -233,12 +231,6 @@ static int init(AVFilterContext *ctx, const char *args)
     if ((ret = av_set_options_string(life, args, "=", ":")) < 0)
         return ret;
 
-    if ((ret = av_parse_video_rate(&frame_rate, life->rate)) < 0) {
-        av_log(ctx, AV_LOG_ERROR, "Invalid frame rate: %s\n", life->rate);
-        return AVERROR(EINVAL);
-    }
-    av_freep(&life->rate);
-
     if (!life->w && !life->filename)
         av_opt_set(life, "size", "320x240", 0);
 
@@ -262,9 +254,6 @@ static int init(AVFilterContext *ctx, const char *args)
         av_log(ctx, AV_LOG_WARNING,
                "Mold color is set while mold isn't, ignoring the color.\n");
 
-    life->time_base.num = frame_rate.den;
-    life->time_base.den = frame_rate.num;
-
     if (!life->filename) {
         /* fill the grid randomly */
         int i;
@@ -293,7 +282,7 @@ static int init(AVFilterContext *ctx, const char *args)
 
     av_log(ctx, AV_LOG_VERBOSE,
            "s:%dx%d r:%d/%d rule:%s stay_rule:%d born_rule:%d stitch:%d seed:%u\n",
-           life->w, life->h, frame_rate.num, frame_rate.den,
+           life->w, life->h, life->frame_rate.num, life->frame_rate.den,
            life->rule_str, life->stay_rule, life->born_rule, life->stitch,
            life->random_seed);
     return 0;
@@ -315,7 +304,7 @@ static int config_props(AVFilterLink *outlink)
 
     outlink->w = life->w;
     outlink->h = life->h;
-    outlink->time_base = life->time_base;
+    outlink->time_base = av_inv_q(life->frame_rate);
 
     return 0;
 }