int Rawdata_PreProcess(const void **in_frame, int n, int frame_size, void *out_frame){    const short **iframe = (const short **)in_frame;    short *oframe = (short *)out_frame;    int member = frame_size / sizeof(short);    for (int m = 0; m < member; m++) {        int sum = 0;        for(int i = 0; i < n; i++) {            short point = iframe[i][m];            printf("frame:%d, index:%d, value:%d\n", i, m, (int)point);            sum += point;        }        oframe[m] = sum / n;    }    return 0;}short frame1[4] = {
   1, 4, 6, 7};short frame2[4] = {
   3, 6, 2, 9};short frame3[4] = {
   1, 5, 3, 4};short out[4];int main(void){    short *group[3] = {frame1, frame2, frame3};    Rawdata_PreProcess(group, 3, 8, out);    printf("a:%d, b:%d, c:%d, d:%d\n", out[0], out[1], out[2], out[3]);}