About real-time processing

[panhu]

Hi:
I would like to ask if I encountered a problem when I was about to perform real-time processing validation. I extracted 128 corresponding data from two. sw files and processed them for echo cancellation, resulting in very small values around 0, which is different from the results obtained using. sw files for processing.I don't know why this is happening.

Test code:

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "speex/speex_echo.h"
#include "speex/speex_preprocess.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdint.h>

#define NN 128
#define TAIL 1024

int test(short echo_buf[], short ref_buf[],short e_buf[])
{
SpeexEchoState *st;
SpeexPreprocessState *den;
int sampleRate = 8000;

st = speex_echo_state_init(NN, TAIL);
den = speex_preprocess_state_init(NN, sampleRate);
speex_echo_ctl(st, SPEEX_ECHO_SET_SAMPLING_RATE, &sampleRate);
speex_preprocess_ctl(den, SPEEX_PREPROCESS_SET_ECHO_STATE, st);

speex_echo_cancellation(st, echo_buf,ref_buf,e_buf);
speex_preprocess_run(den,  e_buf);

speex_echo_state_destroy(st);
speex_preprocess_state_destroy(den);

return 0;

}

int main(){
short a[128] = {76, -112, -42, -66, -86, 38, 30 ,92, 143 ,36, -85, -58, -34, -54, -61, -111, 51, 156, 51, -90, -223, -23 ,88, 11, 46, -2, 8, -99, -74, 192, 22, -105, 12,
-83, 127 ,274 ,-42, 33, 9, -38 ,6, -129, 169, -103, -142 ,302, -168, -4 ,137 ,-280, 73, 124, -29 ,168 ,105, -64, -21, 52, -121, -78 ,67, -50 ,43, 70,
-1, -14 ,-36, 188, -94, -366, 64 ,23 ,2, 189, -2, 26, 46, -100, -43 ,-23 ,-45, -15 ,-38, 85,179, 32, -110, -64 ,26, 0 ,55, -50, -93, 81, -93, -35, 99, -61, -35 ,-67, 22 ,41,
-61 ,76, 5, -152, -19, 129, -91, 28 ,232, -42, 8, -45, -183 ,-45, -17, 11 ,110 ,76 ,-86, 66, -17, -163, 249 ,135, -65, 128};

short b[128] = {-1092, -763, -479, -240, -38, 127 ,257, 359, 739, -10479, 2663, 2441, 2334, 1977 ,1763, 1562 ,14560, -1441, -1316, -1183, -1051, -929, -812,
                -705, 4991, 11916, -4122, -3613 ,-3132, -2689, -2283, -1909, -1061, -1372, -1096, -848, -630, -404, -291, -154 ,7945, 5695, -2728, -2328, -1453,
                -1728, -1418, -1138, -98 -793 -637 -453 ,13756, 10566 ,-5255 -4545 -3888 -3246 -2746 -2249 -1804 -1394 -1073 -772 -6 -395 -199,
                -34, 278 ,-12222 ,2738, 2522, 3095, 1962, 1720 ,1532 ,1530, -11245, 3466, 3042, 2674, 2259, 1916 ,1605, 14580, -1578, -1506, -1415 ,-1314, -1215,
                -1109, -1005, -903 ,-769 ,-717, -624 ,-543 ,-463 ,-393, -326, 6837, 11898, -4132, -3624, 10099 ,-5351, -4645, -3984 ,9873, -5467, -4668,
                -3930, 9980, -5300 ,-4466, -3701, -3015, -2402, -1861, -1385, 1066, -997, -694, -399, -150, 7269, -1226, -927};

short c[128];

printf("\n");
for (int i=0;i<2;i++){
    
}
test(a,b,c);

for(int i =0;i<128;i++){
    printf("%d",c[i]);
    printf(" ");
}

}

[panhu]

As mentioned above, I have found that once using “speex_ preprocess_ run (den, e_buf)"; It will change the results to all values around 0 or 0, and not using it is good