X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=write_common.c;h=8c33b39e08ae783f2ca19ff75f4cda37fcb0a320;hp=7c0d952108cdec23a43c3c01cfe33b9b6f37b77b;hb=c282c836791cedf57c128555af90af37c7c01c05;hpb=885700289d2c7ab64c3bc5a5ab8f6aba14e27632

diff --git a/write_common.c b/write_common.c
index 7c0d9521..8c33b39e 100644
--- a/write_common.c
+++ b/write_common.c
@@ -237,6 +237,21 @@ struct writer_node_group *setup_default_wng(void)
 	return wng;
 }
 
+void register_writer_node(struct writer_node *wn, struct btr_node *parent)
+{
+	struct writer *w = writers + wn->writer_num;
+	char *name = make_message("%s writer", writer_names[wn->writer_num]);
+	int ret;
+
+	wn->btrn = btr_new_node(name, parent, w->execute, wn);
+	strcpy(wn->task.status, name);
+	free(name);
+	ret = w->open(wn);
+	wn->task.post_select = w->post_select_btr;
+	wn->task.pre_select = w->pre_select_btr;
+	register_task(&wn->task);
+}
+
 /**
  * Setup a writer node with the default writer.
  *
@@ -253,31 +268,19 @@ struct writer_node_group *setup_default_wng(void)
  *
  * \return A pointer to the allocated writer node group.
  */
-struct writer_node *setup_writer_node(const char *arg, struct btr_node *parent)
+int setup_writer_node(const char *arg, struct btr_node *parent,
+		struct writer_node *wn)
 {
-	struct writer_node *wn = para_calloc(sizeof(*wn));
-	struct writer *w;
-	const char *name;
-
 	if (arg)
 		wn->conf = check_writer_arg(arg, &wn->writer_num);
 	else {
 		wn->writer_num = DEFAULT_WRITER;
 		wn->conf = writers[DEFAULT_WRITER].parse_config("");
 	}
-	if (!wn->conf) {
-		free(wn);
-		return NULL;
-	}
-	w = writers + wn->writer_num;
-	name = writer_names[wn->writer_num];
-	wn->btrn = btr_new_node(name, parent, w->execute, wn);
-	sprintf(wn->task.status, "%s", name);
-	w->open(wn);
-	wn->task.post_select = w->post_select_btr;
-	wn->task.pre_select = w->pre_select_btr;
-	register_task(&wn->task);
-	return wn;
+	if (!wn->conf)
+		return -E_WRITE_COMMON_SYNTAX;
+	register_writer_node(wn, parent);
+	return 1;
 }
 
 
@@ -303,3 +306,31 @@ void print_writer_helps(int detailed)
 		ggo_print_help(&w->help, detailed);
 	}
 }
+
+static int get_btr_value(struct btr_node *btrn, const char *key, int32_t *result)
+{
+	char *buf = NULL;
+	int ret = btr_exec_up(btrn, key, &buf);
+
+	if (ret < 0)
+		return ret;
+	ret = para_atoi32(buf, result);
+	free(buf);
+	return ret;
+}
+
+/*
+ * Ask parent btr nodes for the samplerate of the current stream.
+ */
+int get_btr_samplerate(struct btr_node *btrn, int32_t *result)
+{
+	return get_btr_value(btrn, "samplerate", result);
+}
+
+/*
+ * Ask parent btr nodes for the channel count of the current stream.
+ */
+int get_btr_channels(struct btr_node *btrn, int32_t *result)
+{
+	return get_btr_value(btrn, "channels", result);
+}