522 lines
30 KiB
C
522 lines
30 KiB
C
/*
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** Copyright 2003-2010, VisualOn, Inc.
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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/*--------------------------------------------------------------------------*
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* ACELP.H *
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*--------------------------------------------------------------------------*
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* Function *
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*--------------------------------------------------------------------------*/
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#ifndef __ACELP_H__
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#define __ACELP_H__
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#include "typedef.h"
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#include "cod_main.h"
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/*-----------------------------------------------------------------*
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* LPC prototypes *
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*-----------------------------------------------------------------*/
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Word16 median5(Word16 x[]);
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void Autocorr(
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Word16 x[], /* (i) : Input signal */
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Word16 m, /* (i) : LPC order */
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Word16 r_h[], /* (o) : Autocorrelations (msb) */
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Word16 r_l[] /* (o) : Autocorrelations (lsb) */
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);
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void Lag_window(
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Word16 r_h[], /* (i/o) : Autocorrelations (msb) */
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Word16 r_l[] /* (i/o) : Autocorrelations (lsb) */
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);
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void Init_Levinson(
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Word16 * mem /* output :static memory (18 words) */
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);
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void Levinson(
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Word16 Rh[], /* (i) : Rh[M+1] Vector of autocorrelations (msb) */
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Word16 Rl[], /* (i) : Rl[M+1] Vector of autocorrelations (lsb) */
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Word16 A[], /* (o) Q12 : A[M] LPC coefficients (m = 16) */
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Word16 rc[], /* (o) Q15 : rc[M] Reflection coefficients. */
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Word16 * mem /* (i/o) :static memory (18 words) */
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);
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void Az_isp(
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Word16 a[], /* (i) Q12 : predictor coefficients */
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Word16 isp[], /* (o) Q15 : Immittance spectral pairs */
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Word16 old_isp[] /* (i) : old isp[] (in case not found M roots) */
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);
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void Isp_Az(
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Word16 isp[], /* (i) Q15 : Immittance spectral pairs */
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Word16 a[], /* (o) Q12 : predictor coefficients (order = M) */
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Word16 m,
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Word16 adaptive_scaling /* (i) 0 : adaptive scaling disabled */
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/* 1 : adaptive scaling enabled */
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);
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void Isp_isf(
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Word16 isp[], /* (i) Q15 : isp[m] (range: -1<=val<1) */
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Word16 isf[], /* (o) Q15 : isf[m] normalized (range: 0.0<=val<=0.5) */
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Word16 m /* (i) : LPC order */
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);
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void Isf_isp(
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Word16 isf[], /* (i) Q15 : isf[m] normalized (range: 0.0<=val<=0.5) */
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Word16 isp[], /* (o) Q15 : isp[m] (range: -1<=val<1) */
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Word16 m /* (i) : LPC order */
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);
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void Int_isp(
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Word16 isp_old[], /* input : isps from past frame */
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Word16 isp_new[], /* input : isps from present frame */
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Word16 frac[], /* input : fraction for 3 first subfr (Q15) */
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Word16 Az[] /* output: LP coefficients in 4 subframes */
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);
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void Weight_a(
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Word16 a[], /* (i) Q12 : a[m+1] LPC coefficients */
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Word16 ap[], /* (o) Q12 : Spectral expanded LPC coefficients */
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Word16 gamma, /* (i) Q15 : Spectral expansion factor. */
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Word16 m /* (i) : LPC order. */
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);
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/*-----------------------------------------------------------------*
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* isf quantizers *
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*-----------------------------------------------------------------*/
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void Qpisf_2s_46b(
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Word16 * isf1, /* (i) Q15 : ISF in the frequency domain (0..0.5) */
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Word16 * isf_q, /* (o) Q15 : quantized ISF (0..0.5) */
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Word16 * past_isfq, /* (io)Q15 : past ISF quantizer */
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Word16 * indice, /* (o) : quantization indices */
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Word16 nb_surv /* (i) : number of survivor (1, 2, 3 or 4) */
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);
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void Qpisf_2s_36b(
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Word16 * isf1, /* (i) Q15 : ISF in the frequency domain (0..0.5) */
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Word16 * isf_q, /* (o) Q15 : quantized ISF (0..0.5) */
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Word16 * past_isfq, /* (io)Q15 : past ISF quantizer */
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Word16 * indice, /* (o) : quantization indices */
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Word16 nb_surv /* (i) : number of survivor (1, 2, 3 or 4) */
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);
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void Dpisf_2s_46b(
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Word16 * indice, /* input: quantization indices */
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Word16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */
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Word16 * past_isfq, /* i/0 : past ISF quantizer */
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Word16 * isfold, /* input : past quantized ISF */
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Word16 * isf_buf, /* input : isf buffer */
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Word16 bfi, /* input : Bad frame indicator */
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Word16 enc_dec
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);
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void Dpisf_2s_36b(
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Word16 * indice, /* input: quantization indices */
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Word16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */
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Word16 * past_isfq, /* i/0 : past ISF quantizer */
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Word16 * isfold, /* input : past quantized ISF */
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Word16 * isf_buf, /* input : isf buffer */
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Word16 bfi, /* input : Bad frame indicator */
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Word16 enc_dec
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);
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void Qisf_ns(
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Word16 * isf1, /* input : ISF in the frequency domain (0..0.5) */
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Word16 * isf_q, /* output: quantized ISF */
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Word16 * indice /* output: quantization indices */
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);
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void Disf_ns(
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Word16 * indice, /* input: quantization indices */
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Word16 * isf_q /* input : ISF in the frequency domain (0..0.5) */
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);
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Word16 Sub_VQ( /* output: return quantization index */
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Word16 * x, /* input : ISF residual vector */
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Word16 * dico, /* input : quantization codebook */
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Word16 dim, /* input : dimention of vector */
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Word16 dico_size, /* input : size of quantization codebook */
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Word32 * distance /* output: error of quantization */
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);
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void Reorder_isf(
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Word16 * isf, /* (i/o) Q15: ISF in the frequency domain (0..0.5) */
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Word16 min_dist, /* (i) Q15 : minimum distance to keep */
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Word16 n /* (i) : number of ISF */
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);
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/*-----------------------------------------------------------------*
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* filter prototypes *
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*-----------------------------------------------------------------*/
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void Init_Decim_12k8(
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Word16 mem[] /* output: memory (2*NB_COEF_DOWN) set to zeros */
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);
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void Decim_12k8(
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Word16 sig16k[], /* input: signal to downsampling */
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Word16 lg, /* input: length of input */
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Word16 sig12k8[], /* output: decimated signal */
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Word16 mem[] /* in/out: memory (2*NB_COEF_DOWN) */
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);
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void Init_HP50_12k8(Word16 mem[]);
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void HP50_12k8(
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Word16 signal[], /* input/output signal */
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Word16 lg, /* lenght of signal */
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Word16 mem[] /* filter memory [6] */
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);
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void Init_HP400_12k8(Word16 mem[]);
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void HP400_12k8(
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Word16 signal[], /* input/output signal */
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Word16 lg, /* lenght of signal */
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Word16 mem[] /* filter memory [6] */
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);
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void Init_Filt_6k_7k(Word16 mem[]);
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void Filt_6k_7k(
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Word16 signal[], /* input: signal */
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Word16 lg, /* input: length of input */
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Word16 mem[] /* in/out: memory (size=30) */
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);
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void Filt_6k_7k_asm(
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Word16 signal[], /* input: signal */
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Word16 lg, /* input: length of input */
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Word16 mem[] /* in/out: memory (size=30) */
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);
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void LP_Decim2(
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Word16 x[], /* in/out: signal to process */
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Word16 l, /* input : size of filtering */
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Word16 mem[] /* in/out: memory (size=3) */
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);
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void Preemph(
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Word16 x[], /* (i/o) : input signal overwritten by the output */
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Word16 mu, /* (i) Q15 : preemphasis coefficient */
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Word16 lg, /* (i) : lenght of filtering */
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Word16 * mem /* (i/o) : memory (x[-1]) */
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);
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void Preemph2(
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Word16 x[], /* (i/o) : input signal overwritten by the output */
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Word16 mu, /* (i) Q15 : preemphasis coefficient */
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Word16 lg, /* (i) : lenght of filtering */
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Word16 * mem /* (i/o) : memory (x[-1]) */
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);
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void Deemph(
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Word16 x[], /* (i/o) : input signal overwritten by the output */
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Word16 mu, /* (i) Q15 : deemphasis factor */
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Word16 L, /* (i) : vector size */
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Word16 * mem /* (i/o) : memory (y[-1]) */
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);
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void Deemph2(
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Word16 x[], /* (i/o) : input signal overwritten by the output */
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Word16 mu, /* (i) Q15 : deemphasis factor */
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Word16 L, /* (i) : vector size */
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Word16 * mem /* (i/o) : memory (y[-1]) */
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);
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void Deemph_32(
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Word16 x_hi[], /* (i) : input signal (bit31..16) */
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Word16 x_lo[], /* (i) : input signal (bit15..4) */
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Word16 y[], /* (o) : output signal (x16) */
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Word16 mu, /* (i) Q15 : deemphasis factor */
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Word16 L, /* (i) : vector size */
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Word16 * mem /* (i/o) : memory (y[-1]) */
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);
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void Deemph_32_asm(
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Word16 x_hi[], /* (i) : input signal (bit31..16) */
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Word16 x_lo[], /* (i) : input signal (bit15..4) */
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Word16 y[], /* (o) : output signal (x16) */
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Word16 * mem /* (i/o) : memory (y[-1]) */
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);
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void Convolve(
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Word16 x[], /* (i) : input vector */
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Word16 h[], /* (i) Q15 : impulse response */
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Word16 y[], /* (o) 12 bits: output vector */
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Word16 L /* (i) : vector size */
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);
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void Convolve_asm(
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Word16 x[], /* (i) : input vector */
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Word16 h[], /* (i) Q15 : impulse response */
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Word16 y[], /* (o) 12 bits: output vector */
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Word16 L /* (i) : vector size */
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);
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void Residu(
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Word16 a[], /* (i) Q12 : prediction coefficients */
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Word16 x[], /* (i) : speech (values x[-m..-1] are needed */
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Word16 y[], /* (o) : residual signal */
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Word16 lg /* (i) : size of filtering */
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);
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void Residu_opt(
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Word16 a[], /* (i) Q12 : prediction coefficients */
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Word16 x[], /* (i) : speech (values x[-m..-1] are needed */
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Word16 y[], /* (o) : residual signal */
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Word16 lg /* (i) : size of filtering */
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);
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void Syn_filt(
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Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */
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Word16 x[], /* (i) : input signal */
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Word16 y[], /* (o) : output signal */
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Word16 lg, /* (i) : size of filtering */
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Word16 mem[], /* (i/o) : memory associated with this filtering. */
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Word16 update /* (i) : 0=no update, 1=update of memory. */
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);
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void Syn_filt_asm(
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Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */
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Word16 x[], /* (i) : input signal */
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Word16 y[], /* (o) : output signal */
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Word16 mem[] /* (i/o) : memory associated with this filtering. */
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);
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void Syn_filt_32(
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Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */
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Word16 m, /* (i) : order of LP filter */
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Word16 exc[], /* (i) Qnew: excitation (exc[i] >> Qnew) */
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Word16 Qnew, /* (i) : exc scaling = 0(min) to 8(max) */
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Word16 sig_hi[], /* (o) /16 : synthesis high */
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Word16 sig_lo[], /* (o) /16 : synthesis low */
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Word16 lg /* (i) : size of filtering */
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);
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void Syn_filt_32_asm(
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Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */
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Word16 m, /* (i) : order of LP filter */
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Word16 exc[], /* (i) Qnew: excitation (exc[i] >> Qnew) */
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Word16 Qnew, /* (i) : exc scaling = 0(min) to 8(max) */
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Word16 sig_hi[], /* (o) /16 : synthesis high */
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Word16 sig_lo[], /* (o) /16 : synthesis low */
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Word16 lg /* (i) : size of filtering */
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);
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/*-----------------------------------------------------------------*
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* pitch prototypes *
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*-----------------------------------------------------------------*/
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Word16 Pitch_ol( /* output: open loop pitch lag */
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Word16 signal[], /* input : signal used to compute the open loop pitch */
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/* signal[-pit_max] to signal[-1] should be known */
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Word16 pit_min, /* input : minimum pitch lag */
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Word16 pit_max, /* input : maximum pitch lag */
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Word16 L_frame /* input : length of frame to compute pitch */
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);
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Word16 Pitch_med_ol( /* output: open loop pitch lag */
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Word16 wsp[], /* input : signal used to compute the open loop pitch */
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/* wsp[-pit_max] to wsp[-1] should be known */
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Coder_State *st, /* i/o : global codec structure */
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Word16 L_frame /* input : length of frame to compute pitch */
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);
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Word16 Med_olag( /* output : median of 5 previous open-loop lags */
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Word16 prev_ol_lag, /* input : previous open-loop lag */
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Word16 old_ol_lag[5]
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);
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void Init_Hp_wsp(Word16 mem[]);
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void scale_mem_Hp_wsp(Word16 mem[], Word16 exp);
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void Hp_wsp(
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Word16 wsp[], /* i : wsp[] signal */
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Word16 hp_wsp[], /* o : hypass wsp[] */
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Word16 lg, /* i : lenght of signal */
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Word16 mem[] /* i/o : filter memory [9] */
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);
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Word16 Pitch_fr4( /* (o) : pitch period. */
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Word16 exc[], /* (i) : excitation buffer */
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Word16 xn[], /* (i) : target vector */
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Word16 h[], /* (i) Q15 : impulse response of synth/wgt filters */
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Word16 t0_min, /* (i) : minimum value in the searched range. */
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Word16 t0_max, /* (i) : maximum value in the searched range. */
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Word16 * pit_frac, /* (o) : chosen fraction (0, 1, 2 or 3). */
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Word16 i_subfr, /* (i) : indicator for first subframe. */
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Word16 t0_fr2, /* (i) : minimum value for resolution 1/2 */
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Word16 t0_fr1, /* (i) : minimum value for resolution 1 */
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Word16 L_subfr /* (i) : Length of subframe */
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);
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void Pred_lt4(
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Word16 exc[], /* in/out: excitation buffer */
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Word16 T0, /* input : integer pitch lag */
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Word16 frac, /* input : fraction of lag */
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Word16 L_subfr /* input : subframe size */
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);
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void pred_lt4_asm(
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Word16 exc[], /* in/out: excitation buffer */
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Word16 T0, /* input : integer pitch lag */
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Word16 frac, /* input : fraction of lag */
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Word16 L_subfr /* input : subframe size */
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);
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/*-----------------------------------------------------------------*
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* gain prototypes *
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*-----------------------------------------------------------------*/
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Word16 G_pitch( /* (o) Q14 : Gain of pitch lag saturated to 1.2 */
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Word16 xn[], /* (i) : Pitch target. */
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Word16 y1[], /* (i) : filtered adaptive codebook. */
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Word16 g_coeff[], /* : Correlations need for gain quantization. */
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Word16 L_subfr /* : Length of subframe. */
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);
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void Init_Q_gain2(
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Word16 * mem /* output :static memory (2 words) */
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);
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Word16 Q_gain2( /* Return index of quantization. */
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Word16 xn[], /* (i) Q_xn:Target vector. */
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Word16 y1[], /* (i) Q_xn:Adaptive codebook. */
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Word16 Q_xn, /* (i) :xn and y1 format */
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Word16 y2[], /* (i) Q9 :Filtered innovative vector. */
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Word16 code[], /* (i) Q9 :Innovative vector. */
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Word16 g_coeff[], /* (i) :Correlations <xn y1> <y1 y1> */
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/* Compute in G_pitch(). */
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Word16 L_subfr, /* (i) :Subframe lenght. */
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Word16 nbits, /* (i) : number of bits (6 or 7) */
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Word16 * gain_pit, /* (i/o)Q14:Pitch gain. */
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Word32 * gain_cod, /* (o) Q16 :Code gain. */
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Word16 gp_clip, /* (i) : Gp Clipping flag */
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Word16 * mem /* (i/o) :static memory (2 words) */
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);
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void Init_D_gain2(
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Word16 * mem /* output :static memory (4 words) */
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);
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void D_gain2(
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Word16 index, /* (i) :index of quantization. */
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Word16 nbits, /* (i) : number of bits (6 or 7) */
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Word16 code[], /* (i) Q9 :Innovative vector. */
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Word16 L_subfr, /* (i) :Subframe lenght. */
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Word16 * gain_pit, /* (o) Q14 :Pitch gain. */
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Word32 * gain_cod, /* (o) Q16 :Code gain. */
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Word16 bfi, /* (i) :bad frame indicator */
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Word16 prev_bfi, /* (i) : Previous BF indicator */
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Word16 state, /* (i) : State of BFH */
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Word16 unusable_frame, /* (i) : UF indicator */
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Word16 vad_hist, /* (i) :number of non-speech frames */
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Word16 * mem /* (i/o) :static memory (4 words) */
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);
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/*-----------------------------------------------------------------*
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* acelp prototypes *
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*-----------------------------------------------------------------*/
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void cor_h_x(
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Word16 h[], /* (i) Q12 : impulse response of weighted synthesis filter */
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Word16 x[], /* (i) Q0 : target vector */
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Word16 dn[] /* (o) <12bit : correlation between target and h[] */
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);
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void ACELP_2t64_fx(
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Word16 dn[], /* (i) <12b : correlation between target x[] and H[] */
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Word16 cn[], /* (i) <12b : residual after long term prediction */
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Word16 H[], /* (i) Q12: impulse response of weighted synthesis filter */
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Word16 code[], /* (o) Q9 : algebraic (fixed) codebook excitation */
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Word16 y[], /* (o) Q9 : filtered fixed codebook excitation */
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Word16 * index /* (o) : index (12): 5+1+5+1 = 11 bits. */
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);
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void ACELP_4t64_fx(
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Word16 dn[], /* (i) <12b : correlation between target x[] and H[] */
|
|
Word16 cn[], /* (i) <12b : residual after long term prediction */
|
|
Word16 H[], /* (i) Q12: impulse response of weighted synthesis filter */
|
|
Word16 code[], /* (o) Q9 : algebraic (fixed) codebook excitation */
|
|
Word16 y[], /* (o) Q9 : filtered fixed codebook excitation */
|
|
Word16 nbbits, /* (i) : 20, 36, 44, 52, 64, 72 or 88 bits */
|
|
Word16 ser_size, /* (i) : bit rate */
|
|
Word16 _index[] /* (o) : index (20): 5+5+5+5 = 20 bits. */
|
|
/* (o) : index (36): 9+9+9+9 = 36 bits. */
|
|
/* (o) : index (44): 13+9+13+9 = 44 bits. */
|
|
/* (o) : index (52): 13+13+13+13 = 52 bits. */
|
|
/* (o) : index (64): 2+2+2+2+14+14+14+14 = 64 bits. */
|
|
/* (o) : index (72): 10+2+10+2+10+14+10+14 = 72 bits. */
|
|
/* (o) : index (88): 11+11+11+11+11+11+11+11 = 88 bits. */
|
|
);
|
|
|
|
void Pit_shrp(
|
|
Word16 * x, /* in/out: impulse response (or algebraic code) */
|
|
Word16 pit_lag, /* input : pitch lag */
|
|
Word16 sharp, /* input : pitch sharpening factor (Q15) */
|
|
Word16 L_subfr /* input : subframe size */
|
|
);
|
|
|
|
|
|
/*-----------------------------------------------------------------*
|
|
* others prototypes *
|
|
*-----------------------------------------------------------------*/
|
|
|
|
void Copy(
|
|
Word16 x[], /* (i) : input vector */
|
|
Word16 y[], /* (o) : output vector */
|
|
Word16 L /* (i) : vector length */
|
|
);
|
|
void Set_zero(
|
|
Word16 x[], /* (o) : vector to clear */
|
|
Word16 L /* (i) : length of vector */
|
|
);
|
|
void Updt_tar(
|
|
Word16 * x, /* (i) Q0 : old target (for pitch search) */
|
|
Word16 * x2, /* (o) Q0 : new target (for codebook search) */
|
|
Word16 * y, /* (i) Q0 : filtered adaptive codebook vector */
|
|
Word16 gain, /* (i) Q14 : adaptive codebook gain */
|
|
Word16 L /* (i) : subframe size */
|
|
);
|
|
Word16 voice_factor( /* (o) Q15 : factor (-1=unvoiced to 1=voiced) */
|
|
Word16 exc[], /* (i) Q_exc: pitch excitation */
|
|
Word16 Q_exc, /* (i) : exc format */
|
|
Word16 gain_pit, /* (i) Q14 : gain of pitch */
|
|
Word16 code[], /* (i) Q9 : Fixed codebook excitation */
|
|
Word16 gain_code, /* (i) Q0 : gain of code */
|
|
Word16 L_subfr /* (i) : subframe length */
|
|
);
|
|
void Scale_sig(
|
|
Word16 x[], /* (i/o) : signal to scale */
|
|
Word16 lg, /* (i) : size of x[] */
|
|
Word16 exp /* (i) : exponent: x = round(x << exp) */
|
|
);
|
|
|
|
void Scale_sig_opt(
|
|
Word16 x[], /* (i/o) : signal to scale */
|
|
Word16 lg, /* (i) : size of x[] */
|
|
Word16 exp /* (i) : exponent: x = round(x << exp) */
|
|
);
|
|
|
|
Word16 Random(Word16 * seed);
|
|
|
|
void Init_gp_clip(
|
|
Word16 mem[] /* (o) : memory of gain of pitch clipping algorithm */
|
|
);
|
|
Word16 Gp_clip(
|
|
Word16 mem[] /* (i/o) : memory of gain of pitch clipping algorithm */
|
|
);
|
|
void Gp_clip_test_isf(
|
|
Word16 isf[], /* (i) : isf values (in frequency domain) */
|
|
Word16 mem[] /* (i/o) : memory of gain of pitch clipping algorithm */
|
|
);
|
|
void Gp_clip_test_gain_pit(
|
|
Word16 gain_pit, /* (i) : gain of quantized pitch */
|
|
Word16 mem[] /* (i/o) : memory of gain of pitch clipping algorithm */
|
|
);
|
|
|
|
|
|
#endif //__ACELP_H__
|
|
|