mat_lib.c

来自「melp hight rate audio compression」· C语言 代码 · 共 117 行

/*

2.4 kbps MELP Proposed Federal Standard speech coder

version 1.2

Copyright (c) 1996, Texas Instruments, Inc.  

Texas Instruments has intellectual property rights on the MELP
algorithm.  The Texas Instruments contact for licensing issues for
commercial and non-government use is William Gordon, Director,
Government Contracts, Texas Instruments Incorporated, Semiconductor
Group (phone [phone]).


*/

/*

  mat_lib.c: Matrix and vector manipulation library

*/

#include "spbstd.h"
#include "mat.h"

/* V_ADD- vector addition */
float *v_add(float *v1,float *v2,int n)
{
    int i;

    for(i=0; i < n; i++)
        v1[i] += v2[i];
    return(v1);
}

/* V_EQU- vector equate */
float *v_equ(float *v1,float *v2,int n)
{
    int i;

    for(i=0; i < n; i++)
        v1[i] = v2[i];
    return(v1);
}
int *v_equ_int(int *v1,int *v2,int n)
{
    int i;

    for(i=0; i < n; i++)
        v1[i] = v2[i];
    return(v1);
}

/* V_INNER- inner product */
float v_inner(float *v1,float *v2,int n)
{
    int i;
    float innerprod;

    for(i=0,innerprod=0.0; i < n; i++)
        innerprod += v1[i] * v2[i];
    return(innerprod);
}

/* v_magsq - sum of squares */

float v_magsq(float *v,int n)
{
    int i;
    float magsq;

    for(i=0,magsq=0.0; i < n; i++)
        magsq += v[i] * v[i];
    return(magsq);
} /* V_MAGSQ */

/* V_SCALE- vector scale */
float *v_scale(float *v,float scale,int n)
{
    int i;

    for(i=0; i < n; i++)
        v[i] *= scale;
    return(v);
}

/* V_SUB- vector difference */
float *v_sub(float *v1,float *v2,int n)
{
    int i;

    for(i=0; i < n; i++)
        v1[i] -= v2[i];
    return(v1);
}

/* v_zap - clear vector */

float *v_zap(float *v,int n)
{
    int i;

    for(i=0; i < n; i++)
        v[i] = 0.0;
    return(v);
} /* V_ZAP */

int *v_zap_int(int *v,int n)
{
    int i;

    for(i=0; i < n; i++)
        v[i] = 0;
    return(v);
} /* V_ZAP */