lavfi/testsrc: make nb_decimals available only in testsrc.

doc/filters.texi

@@ -7453,7 +7453,7 @@ If not specified, or the expressed duration is negative, the video is
 supposed to be generated forever.
 
 @item decimals, n
-Set the number of decimals to show in the timestamp, only used in the
+Set the number of decimals to show in the timestamp, only available in the
 @code{testsrc} source.
 
 The displayed timestamp value will correspond to the original

libavfilter/version.h

@@ -31,7 +31,7 @@
 
 #define LIBAVFILTER_VERSION_MAJOR  3
 #define LIBAVFILTER_VERSION_MINOR  69
-#define LIBAVFILTER_VERSION_MICRO 100
+#define LIBAVFILTER_VERSION_MICRO 101
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \

libavfilter/vsrc_testsrc.c

@@ -55,13 +55,15 @@ typedef struct {
     int64_t pts;
     int64_t duration;           ///< duration expressed in microseconds
     AVRational sar;             ///< sample aspect ratio
-    int nb_decimals;
     int draw_once;              ///< draw only the first frame, always put out the same picture
     int draw_once_reset;        ///< draw only the first frame or in case of reset
     AVFrame *picref;            ///< cached reference containing the painted picture
 
     void (* fill_picture_fn)(AVFilterContext *ctx, AVFrame *frame);
 
+    /* only used by testsrc */
+    int nb_decimals;
+
     /* only used by color */
     FFDrawContext draw;
     FFDrawColor color;
@@ -86,23 +88,13 @@ typedef struct {
 
 static const AVOption options[] = {
     COMMON_OPTIONS
-    /* only used by testsrc */
+    { NULL }
-    { "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0},  0, 17, FLAGS },
-    { "n",        "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0},  0, 17, FLAGS },
-
-    { NULL },
 };
 
 static av_cold int init(AVFilterContext *ctx)
 {
     TestSourceContext *test = ctx->priv;
 
-    if (test->nb_decimals && strcmp(ctx->filter->name, "testsrc")) {
-        av_log(ctx, AV_LOG_WARNING,
-               "Option 'decimals' is ignored with source '%s'\n",
-               ctx->filter->name);
-    }
-
     test->time_base = av_inv_q(test->frame_rate);
     test->nb_frame = 0;
     test->pts = 0;
@@ -317,7 +309,13 @@ AVFilter avfilter_vsrc_nullsrc = {
 
 #if CONFIG_TESTSRC_FILTER
 
-#define testsrc_options options
+static const AVOption testsrc_options[] = {
+    COMMON_OPTIONS
+    { "decimals", "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0},  0, 17, FLAGS },
+    { "n",        "set number of decimals to show", OFFSET(nb_decimals), AV_OPT_TYPE_INT, {.i64=0},  0, 17, FLAGS },
+    { NULL }
+};
+
 AVFILTER_DEFINE_CLASS(testsrc);
 
 /**