ref: 363cd538c50cafcf738f58849b977a3f26c834ad
dir: /amr-wb/lagconc.c/
/*---------------------------------------------------------*
* LAGCONC.C *
*---------------------------------------------------------*
* Concealment of LTP lags during bad frames *
*---------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include "typedef.h"
#include "basic_op.h"
#include "count.h"
#include "cnst.h"
#include "acelp.h"
#define L_LTPHIST 5
#define ONE_PER_3 10923
#define ONE_PER_LTPHIST 6554
void insertion_sort(Word16 array[], Word16 n);
void insert(Word16 array[], Word16 num, Word16 x);
void Init_Lagconc(Word16 lag_hist[])
{
Word16 i;
for (i = 0; i < L_LTPHIST; i++)
{
lag_hist[i] = 64;
}
}
void lagconc(
Word16 gain_hist[], /* (i) : Gain history */
Word16 lag_hist[], /* (i) : Subframe size */
Word16 * T0,
Word16 * old_T0,
Word16 * seed,
Word16 unusable_frame
)
{
Word16 maxLag, minLag, lastLag, lagDif, meanLag = 0;
Word16 lag_hist2[L_LTPHIST] = {0};
Word16 i, tmp, tmp2;
Word16 minGain, lastGain, secLastGain;
Word16 D, D2;
/* Is lag index such that it can be aplied directly or does it has to be subtituted */
lastGain = gain_hist[4]; move16();
secLastGain = gain_hist[3]; move16();
lastLag = lag_hist[0]; move16();
/***********SMALLEST history lag***********/
minLag = lag_hist[0]; move16();
for (i = 1; i < L_LTPHIST; i++)
{
test();
if (sub(lag_hist[i], minLag) < 0)
{
minLag = lag_hist[i]; move16();
}
}
/*******BIGGEST history lag*******/
maxLag = lag_hist[0]; move16();
for (i = 1; i < L_LTPHIST; i++)
{
test();
if (sub(lag_hist[i], maxLag) > 0)
{
maxLag = lag_hist[i]; move16();
}
}
/***********SMALLEST history gain***********/
minGain = gain_hist[0]; move16();
for (i = 1; i < L_LTPHIST; i++)
{
test();
if (sub(gain_hist[i], minGain) < 0)
{
minGain = gain_hist[i]; move16();
}
}
/***Difference between MAX and MIN lag**/
lagDif = sub(maxLag, minLag);
test();
if (unusable_frame != 0)
{
/* LTP-lag for RX_SPEECH_LOST */
/**********Recognition of the LTP-history*********/
test();test();test();test();
if ((sub(minGain, 8192) > 0) && (sub(lagDif, 10) < 0))
{
*T0 = *old_T0; move16();
} else if (sub(lastGain, 8192) > 0 && sub(secLastGain, 8192) > 0)
{
*T0 = lag_hist[0]; move16();
} else
{
/********SORT************/
/* The sorting of the lag history */
for (i = 0; i < L_LTPHIST; i++)
{
lag_hist2[i] = lag_hist[i];move16();
}
insertion_sort(lag_hist2, 5);
/* Lag is weighted towards bigger lags */
/* and random variation is added */
lagDif = sub(lag_hist2[4], lag_hist2[2]);
test();
if (sub(lagDif, 40) > 0)
lagDif = 40; move16();
D = Random(seed); /* D={-1, ...,1} */
/* D2={-lagDif/2..lagDif/2} */
tmp = shr(lagDif, 1);
D2 = mult(tmp, D);
tmp = add(add(lag_hist2[2], lag_hist2[3]), lag_hist2[4]);
*T0 = add(mult(tmp, ONE_PER_3), D2); move16();
}
/* New lag is not allowed to be bigger or smaller than last lag values */
test();
if (sub(*T0, maxLag) > 0)
{
*T0 = maxLag; move16();
}
test();
if (sub(*T0, minLag) < 0)
{
*T0 = minLag; move16();
}
} else
{
/* LTP-lag for RX_BAD_FRAME */
/***********MEAN lag**************/
meanLag = 0; move16();
for (i = 0; i < L_LTPHIST; i++)
{
meanLag = add(meanLag, lag_hist[i]);
}
meanLag = mult(meanLag, ONE_PER_LTPHIST);
tmp = sub(*T0, maxLag);
tmp2 = sub(*T0, lastLag);
test();test();test();
test();test();test();test();
test();test();test();test();
test();test();test();
test();
if (sub(lagDif, 10) < 0 && (sub(*T0, sub(minLag, 5)) > 0) && (sub(tmp, 5) < 0))
{
*T0 = *T0; move16();
} else if (sub(lastGain, 8192) > 0 && sub(secLastGain, 8192) > 0 && (add(tmp2, 10) > 0 && sub(tmp2, 10) < 0))
{
*T0 = *T0; move16();
} else if (sub(minGain, 6554) < 0 && sub(lastGain, minGain) == 0 && (sub(*T0, minLag) > 0 && sub(*T0, maxLag) < 0))
{
*T0 = *T0; move16();
} else if (sub(lagDif, 70) < 0 && sub(*T0, minLag) > 0 && sub(*T0, maxLag) < 0)
{
*T0 = *T0; move16();
} else if (sub(*T0, meanLag) > 0 && sub(*T0, maxLag) < 0)
{
*T0 = *T0; move16();
} else
{
test();test();
test();test();
if ((sub(minGain, 8192) > 0) & (sub(lagDif, 10) < 0))
{
*T0 = lag_hist[0]; move16();
} else if (sub(lastGain, 8192) > 0 && sub(secLastGain, 8192) > 0)
{
*T0 = lag_hist[0]; move16();
} else
{
/********SORT************/
/* The sorting of the lag history */
for (i = 0; i < L_LTPHIST; i++)
{
lag_hist2[i] = lag_hist[i]; move16();
}
insertion_sort(lag_hist2, 5);
/* Lag is weighted towards bigger lags */
/* and random variation is added */
lagDif = sub(lag_hist2[4], lag_hist2[2]);
test();
if (sub(lagDif, 40) > 0)
lagDif = 40; move16();
D = Random(seed); /* D={-1,.., 1} */
/* D2={-lagDif/2..lagDif/2} */
tmp = shr(lagDif, 1);
D2 = mult(tmp, D);
tmp = add(add(lag_hist2[2], lag_hist2[3]), lag_hist2[4]);
*T0 = add(mult(tmp, ONE_PER_3), D2); move16();
}
/* New lag is not allowed to be bigger or smaller than last lag values */
test();
if (sub(*T0, maxLag) > 0)
{
*T0 = maxLag; move16();
}
test();
if (sub(*T0, minLag) < 0)
{
*T0 = minLag; move16();
}
}
}
}
void insertion_sort(Word16 array[], Word16 n)
{
Word16 i;
for (i = 0; i < n; i++)
{
insert(array, i, array[i]);
}
}
void insert(Word16 array[], Word16 n, Word16 x)
{
Word16 i;
for (i = (Word16) (n - 1); i >= 0; i--)
{
test();
if (sub(x, array[i]) < 0)
{
array[i + 1] = array[i]; move16();
} else
break;
}
array[i + 1] = x; move16();
}