reintroduce use of optimized functions for gain into buffer code, and cleanup the way they are declared to avoid depending on Session

git-svn-id: svn://localhost/ardour2/branches/midi@1775 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 40 insertions, 0 deletions

diff --git a/libs/ardour/ardour/runtime_functions.h b/libs/ardour/ardour/runtime_functions.h
new file mode 100644
index 0000000000..c1dab4ebc7
--- /dev/null
+++ b/libs/ardour/ardour/runtime_functions.h
@@ -0,0 +1,40 @@
+/*
+    Copyright (C) 2007 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __ardour_runtime_functions_h__
+#define __ardour_runtime_functions_h__
+
+#include <ardour/types.h>
+
+namespace ARDOUR {
+
+	typedef float (*compute_peak_t)			(const ARDOUR::Sample *, nframes_t, float);
+	typedef void  (*find_peaks_t)                   (const ARDOUR::Sample *, nframes_t, float *, float*);
+	typedef void  (*apply_gain_to_buffer_t)		(ARDOUR::Sample *, nframes_t, float);
+	typedef void  (*mix_buffers_with_gain_t)	(ARDOUR::Sample *, const ARDOUR::Sample *, nframes_t, float);
+	typedef void  (*mix_buffers_no_gain_t)		(ARDOUR::Sample *, const ARDOUR::Sample *, nframes_t);
+
+	extern compute_peak_t		compute_peak;
+	extern find_peaks_t             find_peaks;
+	extern apply_gain_to_buffer_t	apply_gain_to_buffer;
+	extern mix_buffers_with_gain_t	mix_buffers_with_gain;
+	extern mix_buffers_no_gain_t	mix_buffers_no_gain;
+}
+
+#endif /* __ardour_runtime_functions_h__ */