simplemidi/include/MidiMessage.h

#ifndef MIDIMESSAGE_H
#define MIDIMESSAGE_H

#include "utils.h"
#include <sstream>
class MidiException
{
	public:
		MidiException(int c=0, const std::string& m="Success") :
			code(c), message(m){}
		MidiException(const std::string& m, const char* t) :
			code(-1), message(m){}
        virtual ~MidiException(){}
        MidiException(const MidiException& m){
            code=m.code;
            message=m.message;
        }
        int code;
        std::string message;

        const int SUCCESS=0;
        const int OVERFLOW_EXCEPTION=1;
        const int PARSE_EXCEPTION=2;


};

class MidiOverflowException : public MidiException
{
    public:
		MidiOverflowException(const std::string& m, const char* t) :
			MidiException(PARSE_EXCEPTION, "ParseError: "+m){}

        MidiOverflowException() : MidiException(OVERFLOW_EXCEPTION, "Overflow") {}
        virtual ~MidiOverflowException(){}
};

class MidiParseException : public MidiException
{
    public:

		MidiParseException(const std::string& m, const char* t) :
			 MidiException(PARSE_EXCEPTION, "ParseError: "+m){}
        MidiParseException(const std::string& m) : MidiException(PARSE_EXCEPTION, "ParseError: "+m) {}
        virtual ~MidiParseException(){}
};



class MidiMessage
{
    public:
        // types de trames
        static const uint8_t NOTE_ON = 0x90;
        static const uint8_t NOTE_OFF = 0x80;
        static const uint8_t CONTROLLER_CHANGE = 0xB0;

        //constructors / destructors & operators
        MidiMessage(){}
        MidiMessage(int _type) : type(_type) {}
        MidiMessage(const MidiMessage& m ) : type(m.type) {}
        virtual ~MidiMessage(){}

        // functions
        virtual int get_bytes(uint8_t* buffer) const =0;
        virtual std::string to_string() const = 0;
        bool is_note_on() const { return (type&0xf0)==NOTE_ON; }
        bool is_note_off() const { return (type&0xf0)==NOTE_OFF; }

        virtual MidiMessage* copy() const
        {
            uint8_t tmp[3];
            int n;
            n=get_bytes(tmp);
            return  MidiMessage::parse(tmp, n);
        }


        //data
        uint8_t type;

        static MidiMessage* parse(const MidiRawMessage&);
        static MidiMessage* parse(uint8_t * c, int len)
        {
            MidiRawMessage msg(c, c+len);
            return MidiMessage::parse(msg);
        }
        static MidiMessage* parse(Json::Value& v);
};

class MidiMessageList : public std::vector<MidiMessage*>
{
    public:
        MidiMessageList() : std::vector<MidiMessage*>() {}
        MidiMessageList(const MidiMessageList& mml) : std::vector<MidiMessage*>(mml){

        }

        void clear()
        {
            //for(int i=0; i<size(); i++) delete at(i);
            std::vector<MidiMessage*>::clear();
        }
        const MidiMessageList& operator=(const MidiMessageList& m)
        {
            int s = m.size();
            clear();

            for(int i=0; i<s; i++)
                push_back(m[i]->copy());
            return m;
        }
        MidiMessageList(MidiMessage* mm)  : std::vector<MidiMessage*>()
        {
            push_back(mm);
        }
        virtual ~MidiMessageList(){
        }

		void free_content(){
			int s = size();
			for(int i=0; i<s; i++)
				delete at(i);
			clear();
		}
		static MidiMessageList* parse(Json::Value& msg){
			MidiMessageList* m = new MidiMessageList();
			int l = msg.size();
			if(!msg.isArray() || !l){
				std::cerr << "Erreur array attendu dans pad::input(JSon::Value&)\n";
				return NULL;
			}
			if(msg[0].isString()){
				m->push_back(MidiMessage::parse(msg));
			}else{
				for(int i=0; i<l ;i++)
				{
					m->push_back(MidiMessage::parse(msg[i]));
				}
			}
			return m;
		}
		static MidiMessageList* parse(const std::string& msg){
			Json::Value v;
			std::istringstream iss(msg);
			iss >> v;
			return parse(v);
		}
};



class Note : public MidiMessage
{
    public:
        Note() : MidiMessage() {}
        Note(int _type, int ch, int key, int vel) :
            MidiMessage(_type), channel(ch), key(key), velocity(vel) {}
        Note(const Note& n) :  MidiMessage(n.type),
                channel(n.channel), key(n.key), velocity(n.velocity) {}
        virtual ~Note(){}

        uint8_t channel;
        uint8_t key;
        uint8_t velocity;



        virtual Note* copy() const
        {
            uint8_t tmp[3];
            int n;
            n=get_bytes(tmp);
            Note* m = dynamic_cast<Note*>(MidiMessage::parse(tmp, n));
            m->channel=channel;
            m->key=key;
            m->velocity=velocity;
            return m;
        }


        virtual int get_bytes(uint8_t* buffer) const {
            buffer[0]=type|((channel-1)%16);
            buffer[1]=(key%128);
            buffer[2]=(velocity%128);
            return 3;
        }
};


class NoteOn : public Note {
    public:
        NoteOn(int ch, int k, int vel) : Note(MidiMessage::NOTE_ON, ch, k, vel) {}
        virtual ~NoteOn() {}
        virtual std::string to_string() const{
            return "NoteOn("+str(channel)+", "+str(key)+", "+str(velocity)+")";
        }
};


class NoteOff : public Note {
    public:
        NoteOff(int ch, int k, int vel) : Note(MidiMessage::NOTE_OFF, ch, k, vel) {}
        virtual ~NoteOff() {}
        virtual std::string to_string() const{
            return "NoteOn("+str(channel)+", "+str(key)+", "+str(velocity)+")";
        }
};



class ControllerChange : public Note {
    public:
        ControllerChange(int ch, int k, int vel) : Note(MidiMessage::CONTROLLER_CHANGE, ch, k, vel) {}
        virtual ~ControllerChange() {}
        virtual std::string to_string() const{
            return "ControllerChange("+str(channel)+", "+str(key)+", "+str(velocity)+")";
        }
};




#endif // MIDIMESSAGE_H