mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-15 06:30:49 +00:00
65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
|
/*---------------------------------------------------------------------------*\
|
||
|
|
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.
|
||
|
|
|
||
|
|
\*---------------------------------------------------------------------------*/
|
||
|
|
/**
|
||
|
|
@file lsp.h
|
||
|
|
@brief Line Spectral Pair (LSP) functions.
|
||
|
|
*/
|
||
|
|
/* Speex License:
|
||
|
|
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions
|
||
|
|
are met:
|
||
|
|
|
||
|
|
- Redistributions of source code must retain the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer.
|
||
|
|
|
||
|
|
- Redistributions in binary form must reproduce the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer in the
|
||
|
|
documentation and/or other materials provided with the distribution.
|
||
|
|
|
||
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
||
|
|
contributors may be used to endorse or promote products derived from
|
||
|
|
this software without specific prior written permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
||
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
||
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
||
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
||
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
||
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
||
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
||
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __AK2LSPD__
|
||
|
|
#define __AK2LSPD__
|
||
|
|
|
||
|
|
#include "arch.h"
|
||
|
|
|
||
|
|
int lpc_to_lsp (spx_coef_t *a, int lpcrdr, spx_lsp_t *freq, int nb, spx_word16_t delta, char *stack);
|
||
|
|
void lsp_to_lpc(spx_lsp_t *freq, spx_coef_t *ak, int lpcrdr, char *stack);
|
||
|
|
|
||
|
|
/*Added by JMV*/
|
||
|
|
void lsp_enforce_margin(spx_lsp_t *lsp, int len, spx_word16_t margin);
|
||
|
|
|
||
|
|
void lsp_interpolate(spx_lsp_t *old_lsp, spx_lsp_t *new_lsp, spx_lsp_t *interp_lsp, int len, int subframe, int nb_subframes);
|
||
|
|
|
||
|
|
#endif /* __AK2LSPD__ */
|