Add command prompt to console version for changing controls.

git-svn-id: http://svn.drobilla.net/lad/trunk/jalv@5613 a436a847-0d15-0410-975c-d299462d15a1

2 files changed, 41 insertions, 4 deletions

diff --git a/NEWS b/NEWS
index ad51310..84505da 100644
--- a/NEWS
+++ b/NEWS
@@ -1,13 +1,14 @@
 jalv (1.4.7) unstable;
 
   * Set Jack port order metadata
+  * Add command prompt to console version for changing controls
   * Exit on Jack shutdown (Patch from Robin Gareus)
   * Report Jack latency (Patch from Robin Gareus)
   * Exit GUI versions on interrupt
   * Fix semaphore correctness issues
   * Use moc-qt4 if present for systems with multiple Qt versions
 
- -- David Robillard <d@drobilla.net>  Sat, 21 Feb 2015 23:26:19 -0500
+ -- David Robillard <d@drobilla.net>  Thu, 05 Mar 2015 23:18:11 -0500
 
 jalv (1.4.6) stable;
 
diff --git a/src/jalv_console.c b/src/jalv_console.c
index 0632098..79cde0f 100644
--- a/src/jalv_console.c
+++ b/src/jalv_console.c
@@ -116,6 +116,30 @@ jalv_native_ui_type(Jalv* jalv)
 	return NULL;
 }
 
+static void
+jalv_process_command(Jalv* jalv, const char* cmd)
+{
+	char  sym[64];
+	float value;
+	if (sscanf(cmd, "%[a-zA-Z0-9] = %f", sym, &value) == 2) {
+		struct Port* port = NULL;
+		for (uint32_t i = 0; i < jalv->num_ports; ++i) {
+			struct Port* p = &jalv->ports[i];
+			const LilvNode* s = lilv_port_get_symbol(jalv->plugin, p->lilv_port);
+			if (!strcmp(lilv_node_as_string(s), sym)) {
+				port = p;
+				break;
+			}
+		}
+		if (port) {
+			port->control = value;
+			printf("%-*s = %f\n", jalv->longest_sym, sym, value);
+		} else {
+			fprintf(stderr, "error: no port `%s'\n", sym);
+		}
+	}
+}
+
 int
 jalv_open_ui(Jalv* jalv)
 {
@@ -142,10 +166,22 @@ jalv_open_ui(Jalv* jalv)
 
 		show_iface->hide(suil_instance_get_handle(jalv->ui_instance));
 
-		// Caller waits on the done sem, so increment it again to exit
-		zix_sem_post(jalv->done);
-	}
+	} else {
+		// Primitive command prompt for setting control values
+		while (!zix_sem_try_wait(jalv->done)) {
+			char line[128];
+			printf("> ");
+			if (fgets(line, sizeof(line), stdin)) {
+				jalv_process_command(jalv, line);
+			} else {
+				break;
+			}
+		}
+	}		
 
+	// Caller waits on the done sem, so increment it again to exit
+	zix_sem_post(jalv->done);
+	
 	return 0;
 }