f@5: /*
f@5: 
f@5:  Copyright (C) 2016  Queen Mary University of London 
f@5:  Author: Fiore Martin
f@5: 
f@5:  This file is part of Collidoscope.
f@5:  
f@5:  Collidoscope is free software: you can redistribute it and/or modify
f@5:  it under the terms of the GNU General Public License as published by
f@5:  the Free Software Foundation, either version 3 of the License, or
f@5:  (at your option) any later version.
f@5: 
f@5:  This program is distributed in the hope that it will be useful,
f@5:  but WITHOUT ANY WARRANTY; without even the implied warranty of
f@5:  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
f@5:  GNU General Public License for more details.
f@5: 
f@5:  You should have received a copy of the GNU General Public License
f@5:  along with this program.  If not, see <http://www.gnu.org/licenses/>.
f@5: */
f@5: 
f@0: #pragma once
f@0: 
f@0: #include <string>
f@0: #include <array>
f@0: #include "cinder/Color.h"
f@0: #include "cinder/Xml.h"
f@0: 
f@0: 
f@2: /**
f@2:  * Configuration class gathers in one place all the values recided at runtime
f@2:  *
f@2:  * Reading the configuration from an XML file is partially implemented but not used at the moment
f@2:  *
f@2:  */ 
f@0: class Config
f@0: {
f@0: public:
f@0: 
f@0:     Config();
f@0: 
f@0:     // no copies 
f@0:     Config( const Config &copy ) = delete;
f@0:     Config & operator=(const Config &copy) = delete;
f@0: 
f@0:     /* load values for internal field from configuration file. Throws ci::Exception */
f@0:     void loadFromFile( std::string&& path );
f@0: 
f@0:     std::string getInputDeviceKey() const
f@0:     {
f@2:         return mAudioInputDeviceKey; 
f@0:     }
f@0: 
f@2:     /**
f@2:      * Returns number of chunks in a wave 
f@2:      */ 
f@0:     std::size_t getNumChunks() const
f@0:     {
f@0:         return mNumChunks;
f@0:     }
f@0: 
f@2:     /** returns wave lenght in seconds */
f@0:     double getWaveLen() const
f@0:     {
f@0:         return mWaveLen;
f@0:     }
f@0: 
f@2:     /**
f@16:      * Returns wave selection color
f@2:      */ 
f@0:     ci::Color getWaveSelectionColor(size_t waveIdx) const
f@0:     {
f@0:         if (waveIdx == 0){
f@0:             return cinder::Color(243.0f / 255.0f, 6.0f / 255.0f, 62.0f / 255.0f);
f@0:         }
f@0:         else{
f@0:             return cinder::Color(255.0f / 255.0f, 204.0f / 255.0f, 0.0f / 255.0f);
f@0:         }
f@0:     }
f@0: 
f@2:     /**
f@2:      * The size of the ring buffer used to trigger a visual cursor from the audio thread when a new grain is created
f@2:      */ 
f@0:     std::size_t getCursorTriggerMessageBufSize() const
f@0:     {
f@0:         return 512;
f@0:     }
f@0: 
f@2:     /** returns the index of the wave associated to the MIDI channel passed as argument */
f@0:     size_t getWaveForMIDIChannel( unsigned char channelIdx )
f@0:     {
f@0:         return channelIdx;
f@0:     }
f@0: 
f@0:     double getMaxGrainDurationCoeff() const
f@0:     {
f@0:         return 8.0;
f@0:     }
f@0: 
f@0:     double getMaxFilterCutoffFreq() const
f@0:     {
f@0:         return 22050.;
f@0:     }
f@0: 
f@0:     double getMinFilterCutoffFreq() const
f@0:     {
f@0:         return 200.;
f@0:     }
f@0: 
f@0:     size_t getMaxKeyboardVoices() const
f@0:     {
f@0:         return 6;
f@0:     }
f@0: 
f@2:     /**
f@2:      * Returns the maximum size of a wave selection in number of chunks.
f@2:      */ 
f@0:     size_t getMaxSelectionNumChunks() const
f@0:     {
f@0:         return 37;
f@0:     }
f@0: 
f@2:     /**
f@2:      * The value returned is used when creating the oscilloscope. 
f@2:      * The oscilloscope represents the audio output buffer graphically. However it doesn't need to be as refined as the 
f@16:      * audio wave and it's downsampled using the following formula :  (number of oscilloscope points) = (size of audio output buffer) / getOscilloscopeNumPointsDivider() 
f@2:      */ 
f@0:     size_t getOscilloscopeNumPointsDivider() const
f@0:     {
f@0:         return 4;
f@0:     }
f@0: 
f@0: private:
f@0: 
f@0:     void parseWave( const ci::XmlTree &wave, int id );
f@0: 
f@0:     std::string mAudioInputDeviceKey;
f@0:     std::size_t mNumChunks;
f@0:     double mWaveLen;
f@0:     std::array< size_t, NUM_WAVES > mMidiChannels; 
f@0: 
f@0: };