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Diffstat (limited to 'drivers/speex/ltp.h')
| -rw-r--r-- | drivers/speex/ltp.h | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/drivers/speex/ltp.h b/drivers/speex/ltp.h deleted file mode 100644 index 1e435bc36e..0000000000 --- a/drivers/speex/ltp.h +++ /dev/null @@ -1,141 +0,0 @@ -/* 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 -); |