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/*
ZynAddSubFX - a software synthesizer
Recorder.C - Records sound to a file
Copyright (C) 2002-2005 Nasca Octavian Paul
Author: Nasca Octavian Paul
This program is free software; you can redistribute it and/or modify
it under the terms of version 2 of the GNU General Public License
as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License (version 2) for more details.
You should have received a copy of the GNU General Public License (version 2)
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "Recorder.h"
Recorder::Recorder(){
recordbuf_16bit=new short int [SOUND_BUFFER_SIZE*2];
status=0;file=-1;
sampleswritten=0;
notetrigger=0;
for (int i=0;i<SOUND_BUFFER_SIZE*2;i++){
recordbuf_16bit[i]=0;
};
};
Recorder::~Recorder(){
if (recording()==1) stop();
delete [] recordbuf_16bit;
};
int Recorder::preparefile(char *filename_,int overwrite){
if (overwrite==0) file=open(filename_,O_CREAT|O_EXCL|O_WRONLY|O_BINARY,00444+00222);
else file=open(filename_,O_CREAT|O_WRONLY|O_TRUNC|O_BINARY,00444+00222);//overwrite if the file exists
if (file==-1) {
if (errno==EEXIST) return(1);//file exists already
else return(2);//Access Denied or any other problem
};
status=1;//ready
//prepare the space fot the wav header
//the header itself, will be written when the file is closed
unsigned char zerobuf[44]; for (int i=0;i<44;i++) zerobuf[i]=0;
write(file,zerobuf,44);
return(0);
};
void Recorder::start(){
notetrigger=0;
status=2;//recording
};
void Recorder::stop(){
unsigned int chunksize;
lseek(file,0,SEEK_SET);
write(file,"RIFF",4);
chunksize=sampleswritten*4+36;
write(file,&chunksize,4);
write(file,"WAVEfmt ",8);
chunksize=16;
write(file,&chunksize,4);
unsigned short int formattag=1;//uncompresed wave
write(file,&formattag,2);
unsigned short int nchannels=2;//stereo
write(file,&nchannels,2);
unsigned int samplerate=SAMPLE_RATE;//samplerate
write(file,&samplerate,4);
unsigned int bytespersec=SAMPLE_RATE*4;//bytes/sec
write(file,&bytespersec,4);
unsigned short int blockalign=4;//2 channels * 16 bits/8
write(file,&blockalign,2);
unsigned short int bitspersample=16;
write(file,&bitspersample,2);
write(file,"data",4);
chunksize=sampleswritten*blockalign;
write(file,&chunksize,4);
close(file);
file=-1;
status=0;
sampleswritten=0;
};
void Recorder::pause(){
status=0;
};
int Recorder::recording(){
if ((status==2)&&(notetrigger!=0)) return(1);
else return(0);
};
void Recorder::recordbuffer(REALTYPE *outl,REALTYPE *outr){
int tmp;
if (status!=2) return;
for (int i=0;i<SOUND_BUFFER_SIZE;i++){
tmp=(int)(outl[i]*32767.0);
if (tmp<-32768) tmp=-32768;
if (tmp>32767) tmp=32767;
recordbuf_16bit[i*2]=tmp;
tmp=(int)(outr[i]*32767.0);
if (tmp<-32768) tmp=-32768;
if (tmp>32767) tmp=32767;
recordbuf_16bit[i*2+1]=tmp;
};
if (write(file,recordbuf_16bit,SOUND_BUFFER_SIZE*4)<SOUND_BUFFER_SIZE*4) {
fprintf(stderr,"Error while recording !\n");
stop();
};
sampleswritten+=SOUND_BUFFER_SIZE;
};
void Recorder::triggernow(){
if (status==2) notetrigger=1;
};
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