add mod_dub (#16)

* add mod_dub

Signed-off-by: Dave Horton <daveh@beachdognet.com>

* remove some locks

---------

Signed-off-by: Dave Horton <daveh@beachdognet.com>

mod_dub/file_loader.h

@@ -0,0 +1,18 @@
+#ifndef __FILE_LOADER_H__
+#define __FILE_LOADER_H__
+
+#include <switch.h>
+#include "common.h"
+
+extern "C" {
+
+switch_status_t init_file_loader();
+switch_status_t deinit_file_loader();
+
+int start_file_load(const char* path, int rate, int loop, int gain, switch_mutex_t* mutex, CircularBuffer_t* buffer);
+switch_status_t stop_file_load(int id);
+
+}
+
+#endif
+