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/*---------------------------------------------------------------------------*\
FILE........: codec2_internal.h
AUTHOR......: David Rowe
DATE CREATED: April 16 2012
Header file for Codec2 internal states, exposed via this header
file to assist in testing.
\*---------------------------------------------------------------------------*/
/*
Copyright (C) 2012 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 __CODEC2_INTERNAL__
#define __CODEC2_INTERNAL__
struct CODEC2 {
int mode;
kiss_fft_cfg fft_fwd_cfg; /* forward FFT config */
float w[M]; /* time domain hamming window */
COMP W[FFT_ENC]; /* DFT of w[] */
float Pn[2*N]; /* trapezoidal synthesis window */
float Sn[M]; /* input speech */
float hpf_states[2]; /* high pass filter states */
void *nlp; /* pitch predictor states */
int gray; /* non-zero for gray encoding */
kiss_fft_cfg fft_inv_cfg; /* inverse FFT config */
float Sn_[2*N]; /* synthesised output speech */
float ex_phase; /* excitation model phase track */
float bg_est; /* background noise estimate for post filter */
float prev_Wo_enc; /* previous frame's pitch estimate */
MODEL prev_model_dec; /* previous frame's model parameters */
float prev_lsps_dec[LPC_ORD]; /* previous frame's LSPs */
float prev_e_dec; /* previous frame's LPC energy */
int lpc_pf; /* LPC post filter on */
int bass_boost; /* LPC post filter bass boost */
float beta; /* LPC post filter parameters */
float gamma;
float xq_enc[2]; /* joint pitch and energy VQ states */
float xq_dec[2];
int smoothing; /* enable smoothing for channels with errors */
};
#endif
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