-Refactored metronome

This commit is contained in:
Harry van Haaren 2013-08-15 21:09:42 +01:00
parent 3ab0096371
commit 0b11dd30c8
3 changed files with 89 additions and 67 deletions

82
src/metronome.cxx Normal file
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@ -0,0 +1,82 @@
#include "metronome.hxx"
#include <cmath>
#include <iostream>
#include "buffers.hxx"
#include "observer/time.hxx"
using namespace std;
Metronome::Metronome() :
TimeObserver(),
playBar (false),
active (false),
playPoint (0)
{
// create beat and bar samples
endPoint = (44100.f/441);
// samples per cycle of
float scale = 2 * 3.1415 / endPoint;
// And fill it up
for(int i=0;i < endPoint*40;i++){
beatSample[i]= sin(i*scale);
barSample [i]= sin(i*scale*1.5);
}
// don't play after creation
playPoint = endPoint + 1;
}
void Metronome::setActive(bool a)
{
active = a;
// don't play immidiatly
playPoint = endPoint + 1;
}
void Metronome::bar()
{
playPoint = 0;
playBar = true;
}
void Metronome::beat()
{
playPoint = 0;
//cout << "Looper " << track << " got beat()" << flush;
}
void Metronome::setFpb(int f)
{
fpb = f;
// disable play until next beat
playPoint = endPoint + 1;
}
void Metronome::process(int nframes, Buffers* buffers)
{
if ( not active )
return;
float* outL = buffers->audio[Buffers::MASTER_OUT_L];
float* outR = buffers->audio[Buffers::MASTER_OUT_R];
float* sample = &beatSample[0];
if( playBar ) { sample = &barSample[0]; playBar = false; }
for(int i = 0; i < nframes; i++)
{
if ( playPoint < endPoint )
{
outL[i] += sample[playPoint];
outR[i] += sample[playPoint];
playPoint++;
}
}
}

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@ -11,79 +11,18 @@
using namespace std;
// simple metronome class
class Metronome : public TimeObserver
{
public:
Metronome() :
TimeObserver(),
playBar (false),
active (false),
playPoint (0)
{
// create beat and bar samples
endPoint = (44100.f/441);
// samples per cycle of
float scale = 2 * 3.1415 / endPoint;
// And fill it up
for(int i=0;i < endPoint*40;i++){
beatSample[i]= sin(i*scale);
barSample [i]= sin(i*scale*1.5);
}
// don't play after creation
playPoint = endPoint + 1;
}
Metronome();
void setActive(bool a)
{
active = a;
// don't play immidiatly
playPoint = endPoint + 1;
}
void setActive(bool a);
void bar()
{
playPoint = 0;
playBar = true;
}
void bar();
void beat();
void setFpb(int f);
void beat()
{
playPoint = 0;
//cout << "Looper " << track << " got beat()" << flush;
}
void setFpb(int f)
{
fpb = f;
// disable play until next beat
playPoint = endPoint + 1;
}
void process(int nframes, Buffers* buffers)
{
if ( not active )
return;
float* outL = buffers->audio[Buffers::MASTER_OUT_L];
float* outR = buffers->audio[Buffers::MASTER_OUT_R];
float* sample = &beatSample[0];
if( playBar ) { sample = &barSample[0]; playBar = false; }
for(int i = 0; i < nframes; i++)
{
if ( playPoint < endPoint )
{
outL[i] += sample[playPoint];
outR[i] += sample[playPoint];
playPoint++;
}
}
}
void process(int nframes, Buffers* buffers);
private:
int fpb;

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@ -28,6 +28,7 @@ def build(bld):
'src/looperclip.cxx',
'src/trackoutput.cxx',
'src/timemanager.cxx',
'src/metronome.cxx',
'src/logic.cxx',
'src/gridlogic.cxx',