1 files changed, 103 insertions, 0 deletions
diff --git a/bridges/bridge_simple.c b/bridges/bridge_simple.c
new file mode 100644
index 000000000..0dbcd25d2
--- /dev/null
+++ b/bridges/bridge_simple.c
@@ -0,0 +1,103 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2007, Digium, Inc.
+ *
+ * Joshua Colp <jcolp@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Simple two channel bridging module
+ *
+ * \author Joshua Colp <jcolp@digium.com>
+ *
+ * \ingroup bridges
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "asterisk/module.h"
+#include "asterisk/channel.h"
+#include "asterisk/bridging.h"
+#include "asterisk/bridging_technology.h"
+#include "asterisk/frame.h"
+
+static int simple_bridge_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
+{
+	struct ast_channel *c0 = AST_LIST_FIRST(&bridge->channels)->chan, *c1 = AST_LIST_LAST(&bridge->channels)->chan;
+
+	/* If this is the first channel we can't make it compatible... unless we make it compatible with itself O.o */
+	if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
+		return 0;
+	}
+
+	/* See if we need to make these compatible */
+	if (((c0->writeformat == c1->readformat) && (c0->readformat == c1->writeformat) && (c0->nativeformats == c1->nativeformats))) {
+		return 0;
+	}
+
+	/* BOOM! We do. */
+	return ast_channel_make_compatible(c0, c1);
+}
+
+static enum ast_bridge_write_result simple_bridge_write(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
+{
+	struct ast_bridge_channel *other = NULL;
+
+	/* If this is the only channel in this bridge then immediately exit */
+	if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
+		return AST_BRIDGE_WRITE_FAILED;
+	}
+
+	/* Find the channel we actually want to write to */
+	if (!(other = (AST_LIST_FIRST(&bridge->channels) == bridge_channel ? AST_LIST_LAST(&bridge->channels) : AST_LIST_FIRST(&bridge->channels)))) {
+		return AST_BRIDGE_WRITE_FAILED;
+	}
+
+	/* Write the frame out if they are in the waiting state... don't worry about freeing it, the bridging core will take care of it */
+	if (other->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
+		ast_write(other->chan, frame);
+	}
+
+	return AST_BRIDGE_WRITE_SUCCESS;
+}
+
+static struct ast_bridge_technology simple_bridge = {
+	.name = "simple_bridge",
+	.capabilities = AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_THREAD,
+	.preference = AST_BRIDGE_PREFERENCE_MEDIUM,
+	.formats = AST_FORMAT_AUDIO_MASK | AST_FORMAT_VIDEO_MASK | AST_FORMAT_TEXT_MASK,
+	.join = simple_bridge_join,
+	.write = simple_bridge_write,
+};
+
+static int unload_module(void)
+{
+	return ast_bridge_technology_unregister(&simple_bridge);
+}
+
+static int load_module(void)
+{
+	return ast_bridge_technology_register(&simple_bridge);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple two channel bridging module");