+++ /dev/null
-/* Copyright (C) 2002 Jean-Marc Valin */
-/**
- @file ltp.h
- @brief 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/speex_bits.h>
-#include "arch.h"
-
-/** LTP parameters. */
-typedef struct {
- const signed char *gain_cdbk;
- int gain_bits;
- int pitch_bits;
-} ltp_params;
-
-#ifdef FIXED_POINT
-#define gain_3tap_to_1tap(g) (ABS(g[1]) + (g[0]>0 ? g[0] : -SHR16(g[0],1)) + (g[2]>0 ? g[2] : -SHR16(g[2],1)))
-#else
-#define gain_3tap_to_1tap(g) (ABS(g[1]) + (g[0]>0 ? g[0] : -.5*g[0]) + (g[2]>0 ? g[2] : -.5*g[2]))
-#endif
-
-spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len);
-void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack);
-
-void open_loop_nbest_pitch(spx_word16_t *sw, int start, int end, int len, int *pitch, spx_word16_t *gain, int N, char *stack);
-
-
-/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */
-int pitch_search_3tap(
-spx_word16_t target[], /* Target vector */
-spx_word16_t *sw,
-spx_coef_t ak[], /* LPCs for this subframe */
-spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */
-spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */
-spx_sig_t exc[], /* Overlapping codebook */
-const void *par,
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-int p, /* Number of LPC coeffs */
-int nsf, /* Number of samples in subframe */
-SpeexBits *bits,
-char *stack,
-spx_word16_t *exc2,
-spx_word16_t *r,
-int complexity,
-int cdbk_offset,
-int plc_tuning,
-spx_word32_t *cumul_gain
-);
-
-/*Unquantize adaptive codebook and update pitch contribution*/
-void pitch_unquant_3tap(
-spx_word16_t exc[], /* Input excitation */
-spx_word32_t exc_out[], /* Output excitation */
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-const void *par,
-int nsf, /* Number of samples in subframe */
-int *pitch_val,
-spx_word16_t *gain_val,
-SpeexBits *bits,
-char *stack,
-int lost,
-int subframe_offset,
-spx_word16_t last_pitch_gain,
-int cdbk_offset
-);
-
-/** Forced pitch delay and gain */
-int forced_pitch_quant(
-spx_word16_t target[], /* Target vector */
-spx_word16_t *sw,
-spx_coef_t ak[], /* LPCs for this subframe */
-spx_coef_t awk1[], /* Weighted LPCs #1 for this subframe */
-spx_coef_t awk2[], /* Weighted LPCs #2 for this subframe */
-spx_sig_t exc[], /* Excitation */
-const void *par,
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-int p, /* Number of LPC coeffs */
-int nsf, /* Number of samples in subframe */
-SpeexBits *bits,
-char *stack,
-spx_word16_t *exc2,
-spx_word16_t *r,
-int complexity,
-int cdbk_offset,
-int plc_tuning,
-spx_word32_t *cumul_gain
-);
-
-/** Unquantize forced pitch delay and gain */
-void forced_pitch_unquant(
-spx_word16_t exc[], /* Input excitation */
-spx_word32_t exc_out[], /* Output excitation */
-int start, /* Smallest pitch value allowed */
-int end, /* Largest pitch value allowed */
-spx_word16_t pitch_coef, /* Voicing (pitch) coefficient */
-const void *par,
-int nsf, /* Number of samples in subframe */
-int *pitch_val,
-spx_word16_t *gain_val,
-SpeexBits *bits,
-char *stack,
-int lost,
-int subframe_offset,
-spx_word16_t last_pitch_gain,
-int cdbk_offset
-);
projects / 16.git / blobdiff