From ef1e20f6a281f4e6a030b92382c2e3dc5809fe3c Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Thu, 7 Jul 2016 15:36:13 +0200
Subject: some more lua-bindings

* allow C memory allocation with lua-lifetime
* expose some ChanMapping methods
---
 libs/ardour/ardour/dsp_filter.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'libs/ardour/ardour/dsp_filter.h')

diff --git a/libs/ardour/ardour/dsp_filter.h b/libs/ardour/ardour/dsp_filter.h
index 6220dddf5a..50fe1ff704 100644
--- a/libs/ardour/ardour/dsp_filter.h
+++ b/libs/ardour/ardour/dsp_filter.h
@@ -48,12 +48,13 @@ namespace ARDOUR { namespace DSP {
 	 */
 	class DspShm {
 		public:
-			DspShm ()
+			DspShm (size_t s = 0)
 				: _data (0)
 				, _size (0)
 			{
 				assert (sizeof(float) == sizeof (int32_t));
 				assert (sizeof(float) == sizeof (int));
+				allocate (s);
 			}
 
 			~DspShm () {
@@ -65,6 +66,7 @@ namespace ARDOUR { namespace DSP {
 			 * @param s size, total number of float or integer elements to store.
 			 */
 			void allocate (size_t s) {
+				if (s == _size) { return; }
 				_data = realloc (_data, sizeof(float) * s);
 				if (_data) { _size = s; }
 			}
-- 
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