Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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/* Copyright (C) 2002 Jean-Marc Valin & David Rowe
File: cb_search.c
Overlapped codebook search
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 CB_SEARCH_H
#define CB_SEARCH_H
#include "speex_bits.h"
typedef struct split_cb_params {
int subvect_size;
int nb_subvect;
signed char *shape_cb;
int shape_bits;
int have_sign;
} split_cb_params;
void split_cb_search_shape_sign(
float target[], /* target vector */
float ak[], /* LPCs for this subframe */
float awk1[], /* Weighted LPCs for this subframe */
float awk2[], /* Weighted LPCs for this subframe */
void *par, /* Codebook/search parameters*/
int p, /* number of LPC coeffs */
int nsf, /* number of samples in subframe */
float *exc,
float *r,
SpeexBits *bits,
char *stack,
int complexity
);
void split_cb_shape_sign_unquant(
float *exc,
void *par, /* non-overlapping codebook */
int nsf, /* number of samples in subframe */
SpeexBits *bits,
char *stack
);
void noise_codebook_quant(
float target[], /* target vector */
float ak[], /* LPCs for this subframe */
float awk1[], /* Weighted LPCs for this subframe */
float awk2[], /* Weighted LPCs for this subframe */
void *par, /* Codebook/search parameters*/
int p, /* number of LPC coeffs */
int nsf, /* number of samples in subframe */
float *exc,
float *r,
SpeexBits *bits,
char *stack,
int complexity
);
void noise_codebook_unquant(
float *exc,
void *par, /* non-overlapping codebook */
int nsf, /* number of samples in subframe */
SpeexBits *bits,
char *stack
);
#endif