rtmidi/BeatSequence.h

#pragma once
#include <vector>
#include <ostream>
#include <stdexcept>
#include "MessageList.h"

namespace midi {

class BeatSequence : public std::vector<MessageList>
{
    typedef std::vector<MessageList> parent;

public:
    typedef unsigned int BeatIndex;
    typedef void (*ReductionConflictCallback)(BeatSequence& sequence, BeatIndex factor, BeatIndex beatIndex, void* data);

    BeatSequence();
    BeatSequence(BeatIndex size);
    void expand(BeatIndex factor);
    void reduce(BeatIndex factor);
    void reduce(BeatIndex factor, ReductionConflictCallback conflictCallback, void* conflictCallbackData);
    void reduceToNeighbour(BeatIndex factor);
    void reduceErasingConflicts(BeatIndex factor);
    void print(std::ostream& stream) const;

private:
    static void eraseReductionConflict(BeatSequence& sequence, BeatIndex factor, BeatIndex beatIndex, void* data);
    static void moveReductionConflictToNextNeighbour(BeatSequence& sequence, BeatIndex factor, BeatIndex beatIndex, void* data);
};

class UnresolvedBeatSequenceReductionConflict : public std::runtime_error
{
    typedef std::runtime_error parent;
    BeatSequence::BeatIndex beatIndex;

public:
    UnresolvedBeatSequenceReductionConflict(BeatSequence::BeatIndex beatIndex);
    virtual const char* what() const throw();
    BeatSequence::BeatIndex getBeatIndex() const;
};

} // namespace