X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=write_common.c;h=7c0d952108cdec23a43c3c01cfe33b9b6f37b77b;hp=3f6c0bbea422bbbc44e16857000b78df6d45a5d8;hb=885700289d2c7ab64c3bc5a5ab8f6aba14e27632;hpb=b3d637602e6a730a7bc91384c4ef970eeeb3d44c

diff --git a/write_common.c b/write_common.c
index 3f6c0bbe..7c0d9521 100644
--- a/write_common.c
+++ b/write_common.c
@@ -7,12 +7,14 @@
 /** \file write_common.c common functions of para_audiod and para_write */
 
 #include <regex.h>
+#include <stdbool.h>
 
 #include "para.h"
 #include "string.h"
 #include "list.h"
 #include "sched.h"
 #include "ggo.h"
+#include "buffer_tree.h"
 #include "write.h"
 #include "error.h"
 
@@ -234,6 +236,51 @@ struct writer_node_group *setup_default_wng(void)
 	wng->writer_nodes[0].conf = writers[DEFAULT_WRITER].parse_config("");
 	return wng;
 }
+
+/**
+ * Setup a writer node with the default writer.
+ *
+ * If arg is \p NULL, the OS-dependent default writer is used with an empty
+ * configuration string.  It defaults to alsa for Linux, osx for OS X, oss for
+ * *BSD and the file writer if neither of these is supported.
+ *
+ * Once the writer configuration has been retrieved, a writer node is created,
+ * its buffer tree node is added to the buffer tree as a child of the given
+ * parent.
+ *
+ * Finally, the new writer node's taks structure is initialized and registered
+ * to the paraslash scheduler.
+ *
+ * \return A pointer to the allocated writer node group.
+ */
+struct writer_node *setup_writer_node(const char *arg, struct btr_node *parent)
+{
+	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;
+}
+
+
 /**
  * Print the help text of all writers to stdout.
  *