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/*
ZynAddSubFX - a software synthesizer
Sequencer.C - The Sequencer
Copyright (C) 2003-2005 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 <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#include "Sequencer.h"
Sequencer::Sequencer(){
play=0;
for (int i=0;i<NUM_MIDI_TRACKS;i++){
miditrack[i].track.first=NULL;
miditrack[i].track.current=NULL;
miditrack[i].track.size=0;
miditrack[i].track.length=0.0;
miditrack[i].record.first=NULL;
miditrack[i].record.current=NULL;
miditrack[i].record.size=0;
miditrack[i].record.length=0.0;
nextevent[i].time=0.0;
resettime(&playtime[i]);
};
setplayspeed(0);
};
Sequencer::~Sequencer(){
for (int i=0;i<NUM_MIDI_TRACKS;i++){
deletelist(&miditrack[i].track);
deletelist(&miditrack[i].record);
};
};
int Sequencer::importmidifile(char *filename){
if (midifile.loadfile(filename)<0) return(-1);
for (int i=0;i<NUM_MIDI_TRACKS;i++){
deletelist(&miditrack[i].record);
};
if (midifile.parsemidifile(this)<0) return(-1);
//copy the "record" track to the main track
for (int i=0;i<NUM_MIDI_TRACKS;i++){
deletelist(&miditrack[i].track);
miditrack[i].track=miditrack[i].record;
deletelistreference(&miditrack[i].record);
};
return(0);
};
void Sequencer::startplay(){
if (play!=0) return;
for (int i=0;i<NUM_MIDI_TRACKS;i++) resettime(&playtime[i]);
for (int i=0;i<NUM_MIDI_TRACKS;i++){
rewindlist(&miditrack[i].track);
};
play=1;
};
void Sequencer::stopplay(){
if (play==0) return;
play=0;
};
// ************ Player stuff ***************
int Sequencer::getevent(char ntrack,int *midich, int *type,int *par1, int *par2){
*type=0;
if (play==0) return(-1);
//test
// if (ntrack!=0) return(-1);
updatecounter(&playtime[(int)ntrack]);
// printf("%g %g\n",nextevent[ntrack].time,playtime[ntrack].abs);
if (nextevent[(int)ntrack].time<playtime[(int)ntrack].abs) readevent(&miditrack[(int)ntrack].track,&nextevent[(int)ntrack].ev);
else return(-1);
if (nextevent[(int)ntrack].ev.type==-1) return(-1);
// printf("********************************\n");
//sa pun aici o protectie. a.i. daca distanta dintre timpul curent si eveliment e prea mare (>1sec) sa elimin nota
if (ntrack==1) printf("_ %f %.2f (%d)\n",nextevent[(int)ntrack].time,playtime[(int)ntrack].abs,nextevent[(int)ntrack].ev.par2);
*type=nextevent[(int)ntrack].ev.type;
*par1=nextevent[(int)ntrack].ev.par1;
*par2=nextevent[(int)ntrack].ev.par2;
*midich=nextevent[(int)ntrack].ev.channel;
double dt=nextevent[(int)ntrack].ev.deltatime*0.0001*realplayspeed;
printf("zzzzzzzzzzzzzz[%d] %d\n",ntrack,nextevent[(int)ntrack].ev.deltatime);
nextevent[(int)ntrack].time+=dt;
// printf("%f - %d %d \n",nextevent[ntrack].time,par1,par2);
return(0);//?? sau 1
};
/************** Timer stuff ***************/
void Sequencer::resettime(timestruct *t){
t->abs=0.0;
t->rel=0.0;
timeval tval;
t->last=0.0;
#ifndef OS_WINDOWS
if (gettimeofday(&tval,NULL)==0)
t->last=tval.tv_sec+tval.tv_usec*0.000001;
#endif
};
void Sequencer::updatecounter(timestruct *t){
timeval tval;
double current=0.0;
#ifndef OS_WINDOWS
if (gettimeofday(&tval,NULL)==0)
current=tval.tv_sec+tval.tv_usec*0.000001;
#endif
t->rel=current - t->last;
t->abs+=t->rel;
t->last=current;
// printf("%f %f %f\n",t->last,t->abs,t->rel);
};
void Sequencer::setplayspeed(int speed){
playspeed=speed;
realplayspeed=pow(10.0,speed/128.0);
};
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