You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
139 lines
5.0 KiB
139 lines
5.0 KiB
5 years ago
|
/* Copyright (C) 2002 Jean-Marc Valin
|
||
|
|
File: ltp.h
|
||
|
|
Long-Term Prediction functions
|
||
|
|
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "speex_bits.h"
|
||
|
|
|
||
|
|
|
||
|
|
typedef struct ltp_params {
|
||
|
|
signed char *gain_cdbk;
|
||
|
|
int gain_bits;
|
||
|
|
int pitch_bits;
|
||
|
|
} ltp_params;
|
||
|
|
|
||
|
|
|
||
|
|
void open_loop_nbest_pitch(float *sw, int start, int end, int len, int *pitch, float *gain, int N, char *stack);
|
||
|
|
|
||
|
|
|
||
|
|
/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
|
||
|
|
int pitch_search_3tap(
|
||
|
|
float target[], /* Target vector */
|
||
|
|
float *sw,
|
||
|
|
float ak[], /* LPCs for this subframe */
|
||
|
|
float awk1[], /* Weighted LPCs #1 for this subframe */
|
||
|
|
float awk2[], /* Weighted LPCs #2 for this subframe */
|
||
|
|
float exc[], /* Overlapping codebook */
|
||
|
|
void *par,
|
||
|
|
int start, /* Smallest pitch value allowed */
|
||
|
|
int end, /* Largest pitch value allowed */
|
||
|
|
float pitch_coef, /* Voicing (pitch) coefficient */
|
||
|
|
int p, /* Number of LPC coeffs */
|
||
|
|
int nsf, /* Number of samples in subframe */
|
||
|
|
SpeexBits *bits,
|
||
|
|
char *stack,
|
||
|
|
float *exc2,
|
||
|
|
float *r,
|
||
|
|
int complexity
|
||
|
|
);
|
||
|
|
|
||
|
|
/*Unquantize adaptive codebook and update pitch contribution*/
|
||
|
|
void pitch_unquant_3tap(
|
||
|
|
float exc[], /* Excitation */
|
||
|
|
int start, /* Smallest pitch value allowed */
|
||
|
|
int end, /* Largest pitch value allowed */
|
||
|
|
float pitch_coef, /* Voicing (pitch) coefficient */
|
||
|
|
void *par,
|
||
|
|
int nsf, /* Number of samples in subframe */
|
||
|
|
int *pitch_val,
|
||
|
|
float *gain_val,
|
||
|
|
SpeexBits *bits,
|
||
|
|
char *stack,
|
||
|
|
int lost,
|
||
|
|
int subframe_offset,
|
||
|
|
float last_pitch_gain
|
||
|
|
);
|
||
|
|
|
||
|
|
float pitch_gain_search_3tap(
|
||
|
|
float target[], /* Target vector */
|
||
|
|
float ak[], /* LPCs for this subframe */
|
||
|
|
float awk1[], /* Weighted LPCs #1 for this subframe */
|
||
|
|
float awk2[], /* Weighted LPCs #2 for this subframe */
|
||
|
|
float exc[], /* Excitation */
|
||
|
|
void *par,
|
||
|
|
int pitch, /* Pitch value */
|
||
|
|
int p, /* Number of LPC coeffs */
|
||
|
|
int nsf, /* Number of samples in subframe */
|
||
|
|
SpeexBits *bits,
|
||
|
|
char *stack,
|
||
|
|
float *exc2,
|
||
|
|
float *r,
|
||
|
|
int *cdbk_index
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
/** Forced pitch delay and gain */
|
||
|
|
int forced_pitch_quant(
|
||
|
|
float target[], /* Target vector */
|
||
|
|
float *sw,
|
||
|
|
float ak[], /* LPCs for this subframe */
|
||
|
|
float awk1[], /* Weighted LPCs #1 for this subframe */
|
||
|
|
float awk2[], /* Weighted LPCs #2 for this subframe */
|
||
|
|
float exc[], /* Excitation */
|
||
|
|
void *par,
|
||
|
|
int start, /* Smallest pitch value allowed */
|
||
|
|
int end, /* Largest pitch value allowed */
|
||
|
|
float pitch_coef, /* Voicing (pitch) coefficient */
|
||
|
|
int p, /* Number of LPC coeffs */
|
||
|
|
int nsf, /* Number of samples in subframe */
|
||
|
|
SpeexBits *bits,
|
||
|
|
char *stack,
|
||
|
|
float *exc2,
|
||
|
|
float *r,
|
||
|
|
int complexity
|
||
|
|
);
|
||
|
|
|
||
|
|
/** Unquantize forced pitch delay and gain */
|
||
|
|
void forced_pitch_unquant(
|
||
|
|
float exc[], /* Excitation */
|
||
|
|
int start, /* Smallest pitch value allowed */
|
||
|
|
int end, /* Largest pitch value allowed */
|
||
|
|
float pitch_coef, /* Voicing (pitch) coefficient */
|
||
|
|
void *par,
|
||
|
|
int nsf, /* Number of samples in subframe */
|
||
|
|
int *pitch_val,
|
||
|
|
float *gain_val,
|
||
|
|
SpeexBits *bits,
|
||
|
|
char *stack,
|
||
|
|
int lost,
|
||
|
|
int subframe_offset,
|
||
|
|
float last_pitch_gain
|
||
|
|
);
|