//-----------------------------------------------------------------------------
// name: midi_callback()
// desc: callback that is called every time a new MIDI message is received
//-----------------------------------------------------------------------------
void midi_callback( double deltatime,
std::vector< unsigned char > *message,
void *userData )
{
unsigned int nBytes = message->size();
int midimessage=(int)message->at(0),pitch,velocity;
if (nBytes > 0 )
{
if (midimessage==144)
{
pitch = (int)message->at(1);
velocity = (int)message->at(2);
cout<<pitch<<" "<<velocity<<endl;
fluid_synth_noteon( g_synth, 1, pitch,velocity );
if (turn_cpu == 0)
{
if ( velocity==0 )
{
for (int i=0;i<g_current.size();i++)
{
if (g_current[i].pitch() == pitch)
{
g_current[i].setEndTime(g_t);
g_playHuman.add(g_current[i]);
g_current.erase(g_current.begin()+i);
}
}
}
else
{
MidiEvent midz(pitch,velocity,g_quarter,g_t);
g_current.push_back(midz);
}
}
}
else if (midimessage == 128)
{
pitch = (int)message->at(1);
fluid_synth_noteoff( g_synth, 1, pitch);
if (turn_cpu == 0)
{
for (int i=0;i<g_current.size();i++)
{
if (g_current[i].pitch() == pitch)
{
g_current[i].setEndTime(g_t);
g_playHuman.add(g_current[i]);
g_current.erase(g_current.begin()+i);
}
}
}
}
}
}
int audioCallback( void * outputBuffer, void * inputBuffer,
unsigned int bufferSize, double streamTime,
RtAudioStreamStatus status, void * userData )
{
SAMPLE * out = (SAMPLE *)outputBuffer;
SAMPLE acc[bufferSize*2];
fluid_synth_write_float( g_synth, bufferSize, out, 0, 2, out, 1, 2 );
for (int i=0;i<bufferSize*2;i++)
acc[i]=out[i];
fluid_synth_write_float( g_metronome, bufferSize, out, 0, 2, out, 1, 2 );
for (int i=0;i<bufferSize*2;i++)
out[i]+=acc[i];
//turnaround - every n bars
if (g_t >= g_trade)
{
g_timeline_x=0;
turn_cpu=!(turn_cpu);
//cout<<"swap"<<" "<<turn_cpu<<endl;
//if the cpu plays - process once
if (turn_cpu==1)
{
for (int i=0;i<g_current.size();i++)
{
g_current[i].setEndTime(g_t-1);
g_playHuman.add(g_current[i]);
g_current.erase(g_current.begin()+i);
}
g_current.clear();
//g_playHuman.printQ();
g_playComputer = g_playHuman;
g_playHuman.clear();
//g_playComputer.printQ();
g_playComputer.randomize(g_prob_melody,g_prob_rhythm,g_tradebars,g_trade);
//g_playComputer.printQ();
g_drumnote=50;
g_played.clear();
g_played.resize(g_playComputer.size(),0);
g_stopped.clear();
g_stopped.resize(g_playComputer.size(),0);
}
else
{
g_drumnote = 51;
for (int i=40;i<110;i++)
fluid_synth_noteoff( g_synth, 1, i);
}
g_t=0;
g_beat_played=0;
}
//if cpu, then please play
if (turn_cpu && g_playComputer.size()>0 )
{
// cout<<g_played.size();
for (int i=0;i<g_playComputer.size();i++)
{
if ( g_playComputer.at(i).startTime()<=g_t && g_played[i]==0 )
{
fluid_synth_noteon( g_synth, 1, g_playComputer.at(i).pitch(),g_playComputer.at(i).velocity() );
g_played[i]=1;
}
if ( (g_playComputer.at(i).startTime()+g_playComputer.at(i).duration() <= g_t) && g_stopped[i]==0)
{
fluid_synth_noteon( g_synth, 1, g_playComputer.at(i).pitch(),0);
g_stopped[i]=1;
}
}
}
if (g_t==0 && g_metronome_on == 1)
fluid_synth_noteon( g_metronome, 1, g_drumnote,90 );
if (g_t/g_beat > g_beat_played && g_metronome_on == 1 )
{
fluid_synth_noteon( g_metronome, 1, g_drumnote,90 );
g_beat_played++;
}
g_t += bufferSize;
return 0;
}
