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new gen_tri

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This commit is contained in:
coreydunn 2023-07-29 11:50:34 -05:00
parent 4d064b0dcf
commit ecc89a5a62
1 changed files with 21 additions and 37 deletions
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58
synth.c
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@ -217,9 +217,10 @@ void synth_recalc(Synth*synth)
float duty=synth->knobs[oscillator_duty[cur_osc]].value;
bool mix=cur_osc>0&&synth->knobs[oscillator_vol[cur_osc-1]].value>0;
if(fr==0.0)break;
synth->channel[synth->current_channel].offset=
gen_tri(synth->channel[synth->current_channel].buffer[0],amp,fr,mix,SY_BUFFERSIZE,synth->samplerate,duty,
synth->channel[synth->current_channel].offset);
for(size_t i=0;i<SY_BUFFERSIZE;i+=SY_BSIZE)
synth->channel[synth->current_channel].offset=
gen_tri(synth->channel[synth->current_channel].buffer[0]+i,amp,fr,mix,SY_BSIZE,synth->samplerate,duty,
synth->channel[synth->current_channel].offset);
}
// Sawtooth
@ -232,9 +233,10 @@ void synth_recalc(Synth*synth)
float duty=synth->knobs[oscillator_duty[cur_osc]].value;
bool mix=cur_osc>0&&synth->knobs[oscillator_vol[cur_osc-1]].value>0;
if(fr==0.0)break;
synth->channel[synth->current_channel].offset=
gen_saw(synth->channel[synth->current_channel].buffer[0],amp,fr,mix,SY_BUFFERSIZE,synth->samplerate,duty,
synth->channel[synth->current_channel].offset);
for(size_t i=0;i<SY_BUFFERSIZE;i+=SY_BSIZE)
synth->channel[synth->current_channel].offset=
gen_saw(synth->channel[synth->current_channel].buffer[0]+i,amp,fr,mix,SY_BSIZE,synth->samplerate,duty,
synth->channel[synth->current_channel].offset);
}
// Pulse
@ -251,9 +253,10 @@ void synth_recalc(Synth*synth)
synth->knobs[K_LFO2_FREQ].value>0)
duty_buf=synth->lfo2_buffer;
if(fr==0.0)break;
synth->channel[synth->current_channel].offset=
gen_pul(synth->channel[synth->current_channel].buffer[0],amp,fr,mix,SY_BUFFERSIZE,synth->samplerate,duty,duty_buf,
synth->channel[synth->current_channel].offset);
for(size_t i=0;i<SY_BUFFERSIZE;i+=SY_BSIZE)
synth->channel[synth->current_channel].offset=
gen_pul(synth->channel[synth->current_channel].buffer[0]+i,amp,fr,mix,SY_BSIZE,synth->samplerate,duty,duty_buf,
synth->channel[synth->current_channel].offset);
}
// Noise
@ -264,9 +267,10 @@ void synth_recalc(Synth*synth)
float fr=(synth->knobs[K_FREQ].value/synth->knobs[K_FREQ].maxval)*MAXFREQ;
fr+=SEMITONE(fr,synth->knobs[K_DET].value);
if(fr==0.0)break;
synth->channel[synth->current_channel].offset=
gen_nse(synth->channel[synth->current_channel].buffer[0],amp,fr,mix,SY_BUFFERSIZE,synth->samplerate,
synth->channel[synth->current_channel].offset);
for(size_t i=0;i<SY_BUFFERSIZE;i+=SY_BSIZE)
synth->channel[synth->current_channel].offset=
gen_nse(synth->channel[synth->current_channel].buffer[0]+i,amp,fr,mix,SY_BSIZE,synth->samplerate,
synth->channel[synth->current_channel].offset);
}
}
@ -432,35 +436,15 @@ size_t gen_tri(
)
{
float sig=0;
float inc=(freq/(float)samplerate*amplitude);
size_t cyclelen=samplerate/freq*4.0;
size_t points[3]={0,cyclelen/4,cyclelen/4*3};
size_t phase_offset=phase*cyclelen;
size_t i=offset%(size_t)(cyclelen*2.0);
for(;i<count;++i)
size_t i=offset%(size_t)cyclelen;
for(size_t j=0;j<count;++j,++i)
{
size_t pos=i%(cyclelen*samplerate);
if(freq==0.0)break;
if((pos+phase_offset)%cyclelen==points[0])
sig=0.0;
else if((pos+phase_offset)%cyclelen==points[1])
sig=amplitude;
else if((pos+phase_offset)%cyclelen<points[1])
sig+=inc;
else if((pos+phase_offset)%cyclelen==points[2])
sig=-amplitude;
else if((pos+phase_offset)%cyclelen<points[2])
sig-=inc;
else
sig+=inc;
if(!mix)buffer[i]=0;
buffer[i]=(buffer[i]+sig)/(mix?2.0:1.0);
sig=(2.0*fabs(2.0*((float)(i+phase_offset)/cyclelen-floor((float)(i+phase_offset)/(float)cyclelen+0.5)))-1)*amplitude;
if(!mix)buffer[j]=0;
buffer[j]=(buffer[j]+sig)/(mix?2.0:1.0);
}
return i;
}