Add command-line option to control UI update frequency.

git-svn-id: http://svn.drobilla.net/lad/trunk/jalv@5106 a436a847-0d15-0410-975c-d299462d15a1

3 files changed, 11 insertions, 2 deletions

diff --git a/src/jalv.c b/src/jalv.c
index 25676c2..0e77239 100644
--- a/src/jalv.c
+++ b/src/jalv.c
@@ -1041,8 +1041,14 @@ main(int argc, char** argv)
 	
 	options_feature.data = &options;
 
-	/* Calculate theoretical UI update frequency. */
-	jalv.ui_update_hz = (double)jalv.sample_rate / jalv.midi_buf_size * 2.0;
+	if (!jalv.opts.update_rate) {
+		/* Calculate theoretical UI update frequency. */
+		jalv.ui_update_hz = (double)jalv.sample_rate / jalv.midi_buf_size * 2.0;
+		jalv.ui_update_hz = MAX(25, jalv.ui_update_hz);
+	} else {
+		jalv.ui_update_hz = jalv.opts.update_rate;
+		jalv.ui_update_hz = MAX(1, jalv.ui_update_hz);
+	}
 
 	/* The UI can only go so fast, clamp to reasonable limits */
 	jalv.ui_update_hz     = MIN(60, jalv.ui_update_hz);
diff --git a/src/jalv_gtk.c b/src/jalv_gtk.c
index b1c069a..e371a6c 100644
--- a/src/jalv_gtk.c
+++ b/src/jalv_gtk.c
@@ -91,6 +91,8 @@ jalv_init(int* argc, char*** argv, JalvOptions* opts)
 		  "Use Jalv generic UI and not the plugin UI", NULL},
 		{ "buffer-size", 'b', 0, G_OPTION_ARG_INT, &opts->buffer_size,
 		  "Buffer size for plugin <=> UI communication", "SIZE"},
+		{ "update-frequency", 'r', 0, G_OPTION_ARG_INT, &opts->update_rate,
+		  "UI update frequency", NULL},
 		{ 0, 0, 0, 0, 0, 0, 0 } };
 	GError* error = NULL;
 	const int err = gtk_init_with_args(
diff --git a/src/jalv_internal.h b/src/jalv_internal.h
index 9800924..2fccbc5 100644
--- a/src/jalv_internal.h
+++ b/src/jalv_internal.h
@@ -86,6 +86,7 @@ typedef struct {
 	char*    uuid;
 	char*    load;
 	uint32_t buffer_size;
+	uint32_t update_rate;
 	bool     dump;
 	bool     generic_ui;
 } JalvOptions;