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/*---------------------------------------------------------------------------*\
Original Copyright
FILE........: AK2LSPD.H
TYPE........: Turbo C header file
COMPANY.....: Voicetronix
AUTHOR......: James Whitehall
DATE CREATED: 21/11/95
Modified by Jean-Marc Valin
This file contains functions for converting Linear Prediction
Coefficients (LPC) to Line Spectral Pair (LSP) and back. Note that the
LSP coefficients are not in radians format but in the x domain of the
unit circle.
\*---------------------------------------------------------------------------*/
/* Speex License:
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __AK2LSPD__
#define __AK2LSPD__
int lpc_to_lsp (float *a, int lpcrdr, float *freq, int nb, float delta, float *stack);
void lsp_to_lpc(float *freq, float *ak, int lpcrdr, float *stack);
/*Added by JMV*/
void lsp_enforce_margin(float *lsp, int len, float margin);
#endif /* __AK2LSPD__ */
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