1 files changed, 41 insertions, 0 deletions
diff --git a/gr-vocoder/lib/codec2/interp.h b/gr-vocoder/lib/codec2/interp.h
new file mode 100644
index 000000000..d41eac3f8
--- /dev/null
+++ b/gr-vocoder/lib/codec2/interp.h
@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------*\
+
+  FILE........: interp.h
+  AUTHOR......: David Rowe
+  DATE CREATED: 9/10/09
+
+  Interpolation of 20ms frames to 10ms frames.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+  Copyright (C) 2009 David Rowe
+
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License version 2.1, as
+  published by the Free Software Foundation.  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 Lesser General Public License
+  along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __INTERP__
+#define __INTERP__
+
+#define RES_POINTS 20
+
+void interpolate(MODEL *interp, MODEL *prev, MODEL *next);
+void interpolate_lsp(MODEL *interp, MODEL *prev, MODEL *next, 
+		     float *prev_lsps, float  prev_e,
+		     float *next_lsps, float  next_e,
+		     float *ak_interp);
+float resample_amp(MODEL *model, int m);
+float resample_amp_nl(MODEL *model, int m, float Ares_prev[]);
+
+#endif