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QMF.cpp
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#include "stdafx.h"
#include <math.h>
#include "string.h"
#include "stdlib.h"
#define ADD(a,b) ((a)+(b))
#define SUB(a,b) ((a)-(b))
#define MULT16_16(a,b) ((float)(a)*(float)(b))
void QMFIN(float *in, float *low, float *high, int length,float *mem) {
int i, j, k, M2;
int M = 64,N;
N = length;
float *a;
float *x;
float *x2;
/*QMF coefficients*/
float aa[64] {
3.596189e-05f, -0.0001123515f,
-0.0001104587f, 0.0002790277f,
0.0002298438f, -0.0005953563f,
-0.0003823631f, 0.00113826f,
0.0005308539f, -0.001986177f,
-0.0006243724f, 0.003235877f,
0.0005743159f, -0.004989147f,
-0.0002584767f, 0.007367171f,
-0.0004857935f, -0.01050689f,
0.001894714f, 0.01459396f,
-0.004313674f, -0.01994365f,
0.00828756f, 0.02716055f,
-0.01485397f, -0.03764973f,
0.026447f, 0.05543245f,
-0.05095487f, -0.09779096f,
0.1382363f, 0.4600981f,
0.4600981f, 0.1382363f,
-0.09779096f, -0.05095487f,
0.05543245f, 0.026447f,
-0.03764973f, -0.01485397f,
0.02716055f, 0.00828756f,
-0.01994365f, -0.004313674f,
0.01459396f, 0.001894714f,
-0.01050689f, -0.0004857935f,
0.007367171f, -0.0002584767f,
-0.004989147f, 0.0005743159f,
0.003235877f, -0.0006243724f,
-0.001986177f, 0.0005308539f,
0.00113826f, -0.0003823631f,
-0.0005953563f, 0.0002298438f,
0.0002790277f, -0.0001104587f,
-0.0001123515f, 3.596189e-05f
};
a = (float*)malloc(sizeof(float)*M);
x = (float*)malloc(sizeof(float)*(N+M-1));
x2 = x + M - 1;
M2 = M >> 1;
for (i = 0; i<M; i++)
a[M - i - 1] = aa[i];
for (i = 0; i<M - 1; i++)
x[i] = mem[M - i - 2];
for (i = 0; i<N; i++)
x[i + M - 1] = in[i];
for (i = 0; i<M - 1; i++)
mem[i] = in[N - i - 1];
for (i = 0, k = 0; i<N; i += 2, k++)
{
float y1k = 0, y2k = 0;
for (j = 0; j<M2; j++)
{
y1k = ADD(y1k, MULT16_16(a[j], ADD(x[i + j], x2[i - j])));
y2k = SUB(y2k, MULT16_16(a[j], SUB(x[i + j], x2[i - j])));
j++;
y1k = ADD(y1k, MULT16_16(a[j], ADD(x[i + j], x2[i - j])));
y2k = ADD(y2k, MULT16_16(a[j], SUB(x[i + j], x2[i - j])));
}
low[k] = y1k;
high[k] = y2k;
}
free(a);
free(x);
}
void QMFOUT(
const float *x1, /* I Low band signal */
const float *x2, /* I High band signal */
float *y, /* O Synthesised signal */
int N, /* I Signal size */
float *mem1, /* I/O Qmf low band state */
float *mem2 /* I/O Qmf high band state */
)
{
int i, j;
int M2, N2;
float *xx1;
float *xx2;
int M = 64;
float a[64]= {
3.596189e-05f, -0.0001123515f,
-0.0001104587f, 0.0002790277f,
0.0002298438f, -0.0005953563f,
-0.0003823631f, 0.00113826f,
0.0005308539f, -0.001986177f,
-0.0006243724f, 0.003235877f,
0.0005743159f, -0.004989147f,
-0.0002584767f, 0.007367171f,
-0.0004857935f, -0.01050689f,
0.001894714f, 0.01459396f,
-0.004313674f, -0.01994365f,
0.00828756f, 0.02716055f,
-0.01485397f, -0.03764973f,
0.026447f, 0.05543245f,
-0.05095487f, -0.09779096f,
0.1382363f, 0.4600981f,
0.4600981f, 0.1382363f,
-0.09779096f, -0.05095487f,
0.05543245f, 0.026447f,
-0.03764973f, -0.01485397f,
0.02716055f, 0.00828756f,
-0.01994365f, -0.004313674f,
0.01459396f, 0.001894714f,
-0.01050689f, -0.0004857935f,
0.007367171f, -0.0002584767f,
-0.004989147f, 0.0005743159f,
0.003235877f, -0.0006243724f,
-0.001986177f, 0.0005308539f,
0.00113826f, -0.0003823631f,
-0.0005953563f, 0.0002298438f,
0.0002790277f, -0.0001104587f,
-0.0001123515f, 3.596189e-05f
};
M2 = M >> 1;
N2 = N >> 1;
xx1 = (float*)malloc(sizeof(float)*(M2 + N2));
xx2 = (float*)malloc(sizeof(float)*(M2 + N2));
for (i = 0; i < N2; i++)
xx1[i] = x1[N2 - 1 - i];
for (i = 0; i < M2; i++)
xx1[N2 + i] = mem1[2 * i + 1];
for (i = 0; i < N2; i++)
xx2[i] = x2[N2 - 1 - i];
for (i = 0; i < M2; i++)
xx2[N2 + i] = mem2[2 * i + 1];
for (i = 0; i < N2; i += 2) {
float y0, y1, y2, y3;
float x10, x20;
y0 = y1 = y2 = y3 = 0;
x10 = xx1[N2 - 2 - i];
x20 = xx2[N2 - 2 - i];
for (j = 0; j < M2; j += 2) {
float x11, x21;
float a0, a1;
a0 = a[2 * j];
a1 = a[2 * j + 1];
x11 = xx1[N2 - 1 + j - i];
x21 = xx2[N2 - 1 + j - i];
y0 = ADD(y0, MULT16_16(a0, x11 - x21));
y1 = ADD(y1, MULT16_16(a1, x11 + x21));
y2 = ADD(y2, MULT16_16(a0, x10 - x20));
y3 = ADD(y3, MULT16_16(a1, x10 + x20));
a0 = a[2 * j + 2];
a1 = a[2 * j + 3];
x10 = xx1[N2 + j - i];
x20 = xx2[N2 + j - i];
y0 = ADD(y0, MULT16_16(a0, x10 - x20));
y1 = ADD(y1, MULT16_16(a1, x10 + x20));
y2 = ADD(y2, MULT16_16(a0, x11 - x21));
y3 = ADD(y3, MULT16_16(a1, x11 + x21));
}
/* Normalize up explicitly if we're in float */
y[2 * i] = 2.f*y0;
y[2 * i + 1] = 2.f*y1;
y[2 * i + 2] = 2.f*y2;
y[2 * i + 3] = 2.f*y3;
}
for (i = 0; i < M2; i++)
mem1[2 * i + 1] = xx1[i];
for (i = 0; i < M2; i++)
mem2[2 * i + 1] = xx2[i];
free(xx1);
free(xx2);
}
int main()
{
int size,i,j,k;
FILE *finput, *foutput;
//short *pin, *pout;
float low[320] = { 0 }, high[320] = { 0 }, highstorage[320] = { 0 }, highelder[320] = { 0 }, lowstorage[320] = { 0 }, lowelder[320] = { 0 };
float *plow, *phigh;
short *buf;
plow = low;
phigh = high;
float *pin, in[320];
pin = in;
float *pout, out[320];
pout = out;
short *pout2, out2[320];
pout2 = out2;
float mem[64] = { 0 };
float mem1[64] = { 0 };
float mem2[64] = { 0 };
finput = fopen("E:\\f4.pcm", "rb+");
foutput = fopen("E:\\f4out.pcm", "wb+");
fseek(finput, 0, SEEK_END);
size = ftell(finput);
size = size / sizeof(short);
buf = (short*)malloc(sizeof(short)*size);
fseek(finput, 0, SEEK_SET);
fread(buf, size, sizeof(short), finput);
int delay =0;//for high
int delay2 =0;//for low
for (j = 0; j < size -320; ) {
for (i = 0; i < 320; i++) {
in[i] = (float)buf[i + j];
}
j += 320;
QMFIN(pin, plow, phigh, 320, mem);
for (k = 0; k < 320; k++) {
highstorage[k] = high[k];
lowstorage[k] = low[k];
}
if (j > 320 ) {//simulate delay
for (k = 0; k < 320 - delay; k++) {
high[k + delay] = highstorage[k];
}
for (k = 0; k < delay; k++) {
high[k] = highelder[320 - delay + k];
}
for (k = 0; k < 320 - delay2; k++) {
low[k + delay2] = lowstorage[k];
}
for (k = 0; k < delay2; k++) {
low[k] = lowelder[320 - delay2 + k ];
}
}
QMFOUT(plow, phigh, pout, 320, mem1, mem2);
for ( k = 0; k < 320; k++) {
out2[k] = (short)out[k];
highelder[k] = highstorage[k];
lowelder[k] = lowstorage[k];
}
fwrite(pout2, sizeof(short) , 320, foutput);
}
fclose(finput);
fclose(foutput);
free(buf);
return 0;
}