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authorJohnathan Corgan <jcorgan@corganenterprises.com>2011-07-18 15:54:43 -0700
committerJohnathan Corgan <jcorgan@corganenterprises.com>2011-07-18 16:36:15 -0700
commitb409a4b0c6131e01fc5a03c0fc31caa4829b0dec (patch)
tree51ec0115bd114716672f0659800cda933cfc77dd /gr-vocoder/lib/codec2/lsp.h
parentc067ea65d7433d4111b344ded6dfbf089062cf33 (diff)
gr-vocoder: re-implemented gr-codec2-vocoder inside gr-vocoder
Diffstat (limited to 'gr-vocoder/lib/codec2/lsp.h')
-rw-r--r--gr-vocoder/lib/codec2/lsp.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/gr-vocoder/lib/codec2/lsp.h b/gr-vocoder/lib/codec2/lsp.h
new file mode 100644
index 0000000000..5acef01840
--- /dev/null
+++ b/gr-vocoder/lib/codec2/lsp.h
@@ -0,0 +1,37 @@
+/*---------------------------------------------------------------------------*\
+
+ FILE........: lsp.c
+ AUTHOR......: David Rowe
+ DATE CREATED: 24/2/93
+
+
+ This file contains functions for LPC to LSP conversion and LSP to
+ LPC conversion. Note that the LSP coefficients are not in radians
+ format but in the x domain of the unit circle.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+ 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 __LSP__
+#define __LSP__
+
+int lpc_to_lsp (float *a, int lpcrdr, float *freq, int nb, float delta);
+void lsp_to_lpc(float *freq, float *ak, int lpcrdr);
+
+#endif