/CollidoscopeApp/src/PGranularNode.cpp - Annotate - Collidoscope

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root / CollidoscopeApp / src / PGranularNode.cpp @ 16:4dad0b810f18

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-:75b744078d66
+/*
  Copyright (C) 2016  Queen Mary University of London
  Author: Fiore Martin
  This file is part of Collidoscope.
  Collidoscope is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  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 for more details.
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
-:02467299402e
+#include "PGranularNode.h"
 #include "cinder/audio/Context.h"
 #include "cinder/Rand.h"
 // generate random numbers from 0 to max
 // it's passed to PGranular to randomize the phase offset at grain creation
 struct RandomGenerator
+{
     RandomGenerator( size_t max ) : mMax( max )
     {}
     size_t operator()() const {
         return ci::Rand::randUint( mMax );
+    }
     size_t mMax;
 };
 // FIXME maybe use only one random gen
 PGranularNode::PGranularNode( ci::audio::Buffer *grainBuffer, CursorTriggerMsgRingBuffer &triggerRingBuffer ) :
     Node( Format().channels( 1 ) ),
     mGrainBuffer(grainBuffer),
     mSelectionStart( 0 ),
     mSelectionSize( 0 ),
     mGrainDurationCoeff( 1 ),
     mTriggerRingBuffer( triggerRingBuffer ),
     mNoteMsgRingBufferPack( 128 )
+{
     for ( int i = 0; i < kMaxVoices; i++ ){
         mMidiNotes[i] = kNoMidiNote;
+    }
+}
 PGranularNode::~PGranularNode()
+{
+}
 void PGranularNode::initialize()
+{
     mTempBuffer = std::make_shared< ci::audio::Buffer >( getFramesPerBlock() );
-:4dad0b810f18
+    mRandomOffset.reset( new RandomGenerator( getSampleRate() / 100 ) ); // divided by 100 corresponds to multiplied by 0.01 in the time domain
 :02467299402e
     /* create the PGranular object for looping */
     mPGranularLoop.reset( new collidoscope::PGranular<float, RandomGenerator, PGranularNode>( mGrainBuffer->getData(), mGrainBuffer->getNumFrames(), getSampleRate(), *mRandomOffset, *this, -1 ) );
     /* create the PGranular object for notes */
     for ( size_t i = 0; i < kMaxVoices; i++ ){
         mPGranularNotes[i].reset( new collidoscope::PGranular<float, RandomGenerator, PGranularNode>( mGrainBuffer->getData(), mGrainBuffer->getNumFrames(), getSampleRate(), *mRandomOffset, *this, i ) );
+    }
+}
 void PGranularNode::process (ci::audio::Buffer *buffer )
+{
     // only update PGranular if the atomic value has changed from the previous time
     const boost::optional<size_t> selectionSize = mSelectionSize.get();
     if ( selectionSize ){
         mPGranularLoop->setSelectionSize( *selectionSize );
         for ( size_t i = 0; i < kMaxVoices; i++ ){
             mPGranularNotes[i]->setSelectionSize( *selectionSize );
+        }
+    }
     const boost::optional<size_t> selectionStart = mSelectionStart.get();
     if ( selectionStart ){
         mPGranularLoop->setSelectionStart( *selectionStart );
         for ( size_t i = 0; i < kMaxVoices; i++ ){
             mPGranularNotes[i]->setSelectionStart( *selectionStart );
+        }
+    }
     const boost::optional<double> grainDurationCoeff = mGrainDurationCoeff.get();
     if ( grainDurationCoeff ){
         mPGranularLoop->setGrainsDurationCoeff( *grainDurationCoeff );
         for ( size_t i = 0; i < kMaxVoices; i++ ){
             mPGranularNotes[i]->setGrainsDurationCoeff( *grainDurationCoeff );
+        }
+    }
     // check messages to start/stop notes or loop
     size_t availableRead = mNoteMsgRingBufferPack.getBuffer().getAvailableRead();
     mNoteMsgRingBufferPack.getBuffer().read( mNoteMsgRingBufferPack.getExchangeArray(), availableRead );
     for ( size_t i = 0; i < availableRead; i++ ){
         handleNoteMsg( mNoteMsgRingBufferPack.getExchangeArray()[i] );
+    }
     // process loop if not idle
     if ( !mPGranularLoop->isIdle() ){
         /* buffer is one channel only so I can use getData */
         mPGranularLoop->process( buffer->getData(), mTempBuffer->getData(), buffer->getSize() );
+    }
     // process notes if not idle
     for ( size_t i = 0; i < kMaxVoices; i++ ){
         if ( mPGranularNotes[i]->isIdle() )
             continue;
         mPGranularNotes[i]->process( buffer->getData(), mTempBuffer->getData(), buffer->getSize() );
         if ( mPGranularNotes[i]->isIdle() ){
             // this note became idle so update mMidiNotes
             mMidiNotes[i] = kNoMidiNote;
+        }
+    }
+}
-:4dad0b810f18
+// Called back when new PGranular is triggered or turned off. Sends notification message to graphic thread.
-:02467299402e
+void PGranularNode::operator()( char msgType, int ID ) {
     switch ( msgType ){
     case 't':  { // trigger
         CursorTriggerMsg msg = makeCursorTriggerMsg( Command::TRIGGER_UPDATE, ID ); // put ID
         mTriggerRingBuffer.write( &msg, 1 );
     };
         break;
     case 'e': // end envelope
         CursorTriggerMsg msg = makeCursorTriggerMsg( Command::TRIGGER_END, ID ); // put ID
         mTriggerRingBuffer.write( &msg, 1 );
         break;
+    }
+}
 void PGranularNode::handleNoteMsg( const NoteMsg &msg )
+{
     switch ( msg.cmd ){
     case Command::NOTE_ON: {
         bool synthFound = false;
         for ( int i = 0; i < kMaxVoices; i++ ){
             // note was already on, so re-attack
             if ( mMidiNotes[i] == msg.midiNote ){
                 mPGranularNotes[i]->noteOn( msg.rate );
                 synthFound = true;
                 break;
+            }
+        }
         if ( !synthFound ){
-:4dad0b810f18
+            // then look for a free voice
-:02467299402e
+            for ( int i = 0; i < kMaxVoices; i++ ){
                 if ( mMidiNotes[i] == kNoMidiNote ){
                     mPGranularNotes[i]->noteOn( msg.rate );
                     mMidiNotes[i] = msg.midiNote;
                     synthFound = true;
                     break;
+                }
+            }
+        }
     };
         break;
     case Command::NOTE_OFF: {
         for ( int i = 0; i < kMaxVoices; i++ ){
             if ( !mPGranularNotes[i]->isIdle() && mMidiNotes[i] == msg.midiNote ){
                 mPGranularNotes[i]->noteOff();
                 break;
+            }
+        }
     };
         break;
     case Command::LOOP_ON: {
         mPGranularLoop->noteOn( 1.0 );
     };
         break;
     case Command::LOOP_OFF: {
         mPGranularLoop->noteOff();
     };
         break;
     default:
         break;
+    }
+}