mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-19 10:32:02 -05:00
c1e779f966
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2646 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
113 lines
2.2 KiB
C++
113 lines
2.2 KiB
C++
#include "getfile.h"
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#include <QDir>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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void getfile(QString fname, int ntrperiod)
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{
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char name[80];
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strcpy(name,fname.toAscii());
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FILE* fp=fopen(name,"rb");
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int npts=ntrperiod*12000;
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memset(jt9com_.d2,0,2*npts);
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if(fp != NULL) {
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// Read (and ignore) a 44-byte WAV header; then read data
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fread(jt9com_.d2,1,44,fp);
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int nrd=fread(jt9com_.d2,2,npts,fp);
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fclose(fp);
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}
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}
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void savewav(QString fname, int ntrperiod)
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{
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struct {
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char ariff[4];
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int nchunk;
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char awave[4];
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char afmt[4];
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int lenfmt;
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short int nfmt2;
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short int nchan2;
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int nsamrate;
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int nbytesec;
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short int nbytesam2;
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short int nbitsam2;
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char adata[4];
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int ndata;
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} hdr;
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int npts=ntrperiod*12000;
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// qint16* buf=(qint16*)malloc(2*npts);
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char name[80];
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strcpy(name,fname.toAscii());
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FILE* fp=fopen(name,"wb");
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if(fp != NULL) {
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// Write a WAV header
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hdr.ariff[0]='R';
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hdr.ariff[1]='I';
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hdr.ariff[2]='F';
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hdr.ariff[3]='F';
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hdr.nchunk=0;
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hdr.awave[0]='W';
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hdr.awave[0]='A';
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hdr.awave[0]='V';
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hdr.awave[0]='E';
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hdr.afmt[0]='f';
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hdr.afmt[1]='m';
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hdr.afmt[2]='t';
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hdr.afmt[3]=' ';
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hdr.lenfmt=16;
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hdr.nfmt2=1;
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hdr.nchan2=1;
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hdr.nsamrate=12000;
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hdr.nbytesec=2*12000;
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hdr.nbytesam2=2;
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hdr.nbitsam2=16;
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hdr.adata[0]='d';
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hdr.adata[1]='a';
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hdr.adata[2]='t';
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hdr.adata[3]='a';
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hdr.ndata=2*npts;
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fwrite(&hdr,sizeof(hdr),1,fp);
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// memcpy(jt9com_.d2,buf,2*npts);
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// fwrite(buf,2,npts,fp);
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fwrite(jt9com_.d2,2,npts,fp);
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fclose(fp);
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}
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// free(buf);
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}
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//#define MAX_RANDOM 0x7fffffff
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/* Generate gaussian random float with mean=0 and std_dev=1 */
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float gran()
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{
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float fac,rsq,v1,v2;
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static float gset;
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static int iset;
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if(iset){
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/* Already got one */
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iset = 0;
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return gset;
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}
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/* Generate two evenly distributed numbers between -1 and +1
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* that are inside the unit circle
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*/
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do {
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v1 = 2.0 * (float)rand() / RAND_MAX - 1;
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v2 = 2.0 * (float)rand() / RAND_MAX - 1;
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rsq = v1*v1 + v2*v2;
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} while(rsq >= 1.0 || rsq == 0.0);
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fac = sqrt(-2.0*log(rsq)/rsq);
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gset = v1*fac;
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iset++;
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return v2*fac;
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}
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