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138 lines
5.0 KiB
138 lines
5.0 KiB
/* Copyright (C) 2002 Jean-Marc Valin |
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File: ltp.h |
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Long-Term Prediction functions |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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- Neither the name of the Xiph.org Foundation nor the names of its |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "speex_bits.h" |
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typedef struct ltp_params { |
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signed char *gain_cdbk; |
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int gain_bits; |
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int pitch_bits; |
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} ltp_params; |
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void open_loop_nbest_pitch(float *sw, int start, int end, int len, int *pitch, float *gain, int N, char *stack); |
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/** Finds the best quantized 3-tap pitch predictor by analysis by synthesis */ |
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int pitch_search_3tap( |
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float target[], /* Target vector */ |
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float *sw, |
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float ak[], /* LPCs for this subframe */ |
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float awk1[], /* Weighted LPCs #1 for this subframe */ |
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float awk2[], /* Weighted LPCs #2 for this subframe */ |
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float exc[], /* Overlapping codebook */ |
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void *par, |
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int start, /* Smallest pitch value allowed */ |
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int end, /* Largest pitch value allowed */ |
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float pitch_coef, /* Voicing (pitch) coefficient */ |
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int p, /* Number of LPC coeffs */ |
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int nsf, /* Number of samples in subframe */ |
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SpeexBits *bits, |
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char *stack, |
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float *exc2, |
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float *r, |
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int complexity |
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); |
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/*Unquantize adaptive codebook and update pitch contribution*/ |
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void pitch_unquant_3tap( |
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float exc[], /* Excitation */ |
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int start, /* Smallest pitch value allowed */ |
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int end, /* Largest pitch value allowed */ |
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float pitch_coef, /* Voicing (pitch) coefficient */ |
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void *par, |
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int nsf, /* Number of samples in subframe */ |
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int *pitch_val, |
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float *gain_val, |
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SpeexBits *bits, |
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char *stack, |
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int lost, |
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int subframe_offset, |
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float last_pitch_gain |
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); |
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float pitch_gain_search_3tap( |
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float target[], /* Target vector */ |
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float ak[], /* LPCs for this subframe */ |
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float awk1[], /* Weighted LPCs #1 for this subframe */ |
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float awk2[], /* Weighted LPCs #2 for this subframe */ |
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float exc[], /* Excitation */ |
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void *par, |
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int pitch, /* Pitch value */ |
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int p, /* Number of LPC coeffs */ |
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int nsf, /* Number of samples in subframe */ |
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SpeexBits *bits, |
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char *stack, |
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float *exc2, |
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float *r, |
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int *cdbk_index |
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); |
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/** Forced pitch delay and gain */ |
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int forced_pitch_quant( |
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float target[], /* Target vector */ |
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float *sw, |
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float ak[], /* LPCs for this subframe */ |
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float awk1[], /* Weighted LPCs #1 for this subframe */ |
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float awk2[], /* Weighted LPCs #2 for this subframe */ |
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float exc[], /* Excitation */ |
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void *par, |
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int start, /* Smallest pitch value allowed */ |
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int end, /* Largest pitch value allowed */ |
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float pitch_coef, /* Voicing (pitch) coefficient */ |
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int p, /* Number of LPC coeffs */ |
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int nsf, /* Number of samples in subframe */ |
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SpeexBits *bits, |
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char *stack, |
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float *exc2, |
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float *r, |
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int complexity |
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); |
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/** Unquantize forced pitch delay and gain */ |
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void forced_pitch_unquant( |
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float exc[], /* Excitation */ |
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int start, /* Smallest pitch value allowed */ |
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int end, /* Largest pitch value allowed */ |
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float pitch_coef, /* Voicing (pitch) coefficient */ |
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void *par, |
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int nsf, /* Number of samples in subframe */ |
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int *pitch_val, |
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float *gain_val, |
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SpeexBits *bits, |
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char *stack, |
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int lost, |
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int subframe_offset, |
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float last_pitch_gain |
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);
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