demotool/sync.hh

#pragma once
#ifndef REAL_BUILD
# include "externals.hh"
#endif


enum class E_SyncSegment
{
	LINEAR ,
	RAMP ,
	SMOOTH ,
	//HERMITE
};

struct T_SyncSegment
{
	uint32_t nPoints;
	E_SyncSegment type;
	std::vector< float > values;		// nPoints items
	std::vector< uint32_t > durations;	// nPoints - 1 items
};

using T_SyncVariable = std::vector< T_SyncSegment >;


struct T_SyncData
{
	T_SyncData( );
	T_SyncData(
		__rd__ const uint32_t duration ,
		__rd__ const float units ) noexcept;

	float duration( ) const noexcept
		{ return duration_ * units_; }

	void setSyncVariable(
		__rd__ std::string const& name ,
		__rw__ T_SyncVariable&& variable ) noexcept;

	T_SyncVariable const& variable(
		__rd__ std::string const& name ) const noexcept;
	uint32_t offsetOf(
		__rd__ std::string const& name ) const noexcept;

	float valueOf(
		__rd__ std::string const& variable ,
		__rd__ const float time ) const noexcept;

	void computeValues(
		__rd__ const float time ,
		__wr__ std::vector< float >& values ) const noexcept;

    private:
	static const T_SyncVariable MissingVariable_;

	// Caching structure used to access segments
	using T_SegRef_ = std::pair< uint32_t , uint32_t >;
	struct T_VarHelper_
	{
		T_SyncVariable variable;
		std::vector< T_SegRef_ > segRefs;
		std::vector< float > segStarts;
		uint32_t position;

		T_VarHelper_(
			__rw__ T_SyncVariable&& variable ,
			__rd__ const uint32_t duration ,
			__rd__ const uint32_t position ) noexcept;
		float valueAt(
			__rd__ const float position ,
			__rd__ const float units ) const noexcept;
	};

	uint32_t duration_;
	float units_;
	std::unordered_map< std::string , T_VarHelper_ > variables_;
};