bridge_features: Support One touch Monitor/MixMonitor

In addition to porting those features, they now enjoy greater feature parity
with one another. Specifically, AutoMixMon now has a start and stop
message that can be specified with TOUCH_MIXMONITOR_MESSAGE_START and
TOUCH_MIXMONITOR_MESSAGE_STOP.

(closes issue ASTERISK-21553)
Reported by: Matt Jordan
Review: https://reviewboard.asterisk.org/r/2620/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@393309 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 98 insertions, 0 deletions

diff --git a/main/mixmonitor.c b/main/mixmonitor.c
new file mode 100644
index 000000000..6de72794a
--- /dev/null
+++ b/main/mixmonitor.c
@@ -0,0 +1,98 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2013, Digium, Inc.
+ *
+ * Jonathan Rose <jrose@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 loadable MixMonitor functionality
+ *
+ * \author Jonathan Rose <jrose@digium.com>
+ */
+
+/*** MODULEINFO
+	<support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision: 390830 $")
+
+#include "asterisk/lock.h"
+#include "asterisk/logger.h"
+#include "asterisk/mixmonitor.h"
+#include "asterisk/utils.h"
+#include "asterisk/channel.h"
+
+AST_RWLOCK_DEFINE_STATIC(mixmonitor_lock);
+
+static struct ast_mixmonitor_methods mixmonitor_methods;
+static int table_loaded = 0;
+
+int ast_set_mixmonitor_methods(struct ast_mixmonitor_methods *method_table)
+{
+	SCOPED_WRLOCK(lock, &mixmonitor_lock);
+
+	if (table_loaded) {
+		/* If mixmonitor methods have already been provided, reject the new set */
+		ast_log(LOG_ERROR, "Tried to set mixmonitor methods, but something else has already provided them.\n");
+		return -1;
+	}
+
+	mixmonitor_methods = *method_table;
+
+	table_loaded = 1;
+	return 0;
+}
+
+int ast_clear_mixmonitor_methods(void)
+{
+	SCOPED_WRLOCK(lock, &mixmonitor_lock);
+
+	if (!table_loaded) {
+		ast_log(LOG_ERROR, "Tried to clear mixmonitor methods, but none are currently loaded.\n");
+		return -1;
+	}
+
+	memset(&mixmonitor_methods, 0, sizeof(mixmonitor_methods));
+
+	table_loaded = 0;
+	return 0;
+}
+
+int ast_start_mixmonitor(struct ast_channel *chan, const char *filename, const char *options)
+{
+	SCOPED_RDLOCK(lock, &mixmonitor_lock);
+
+	if (!mixmonitor_methods.start) {
+		ast_log(LOG_ERROR, "No loaded module currently provides MixMonitor starting functionality.\n");
+		return -1;
+	}
+
+	return mixmonitor_methods.start(chan, filename, options);
+}
+
+int ast_stop_mixmonitor(struct ast_channel *chan, const char *mixmon_id)
+{
+	SCOPED_RDLOCK(lock, &mixmonitor_lock);
+
+	if (!mixmonitor_methods.stop) {
+		ast_log(LOG_ERROR, "No loaded module currently provides MixMonitor stopping functionality.\n");
+		return -1;
+	}
+
+	return mixmonitor_methods.stop(chan, mixmon_id);
+}