#ifndef _MIDITRACK_HPP_
#define _MIDITRACK_HPP_
#include <stdio.h>
#include <common/windows.hpp>
#include <common/memfile.hpp>
#include <midiwrt/midihdr.hpp>

class MidiTrack
{
public:
	enum EventType{MetaEvent=0xFF,SystemExclusiveOne=0xF0,SystemExclusiveTwo=0xF7,NullEvent=0x00};
	enum MidiChannelMsg{MIDIProgramChange=0xC0,MIDINoteOff=0x80,MIDINoteOn=0x90,
			 MIDIKeyPressure=0xA0,MIDIParameter=0xB0,MIDIPitchBend=0xE0,MIDIProgram=0xC0,
			 MIDIChannelPressure=0xD0};
	enum MetaEventType{SequenceNumberEvent=0x00,TextEvent=0x01,CopyrightNotice=0x02,
			 SequenceTrackName=0x03,InstrumentName=0x04,Lyric=0x05,Marker=0x06,CuePoint=0x07,
			 EndOfTrack=0x2F,SetTempo=0x51,SMPTEFormatSpec=0x54,TimeSignature=0x58,
			 KeySignature=0x59,SequencerSpecificMetaEvent=0x7F};
	MidiTrack(MemFile &midiFile);
	~MidiTrack();
	WORD writeHeader(void);
	WORD readHeader(void);
  WORD rewind(void);
	void setDeltaTime(DWORD eventTime);
	WORD writeMetaEvent(MetaEventType metaEventType,void *lpData,BYTE lengthData);
	WORD writeMidiChannelMessage(MidiChannelMsg midiChannelMessage,BYTE channel,void *lpData,BYTE lengthData);
  WORD writeEndTrack(void);
	DWORD length(void)const;
	void setLocation(MemFile &midiFile);
private:
	enum {TrackIDLen=4};
	void length(DWORD lengthData);
  WORD flushTrack(void);
  WORD writeTimeValue(DWORD longValue);

	char mTrack[TrackIDLen];
	DWORD mLengthData;
	DWORD mDeltaTime;
	DWORD mHeaderPosition;
	DWORD mByteCount;
  MemFile &mMidiFile;
};

inline
MidiTrack::MidiTrack(MemFile &midiFile)
: mLengthData(0),	mDeltaTime(0), mHeaderPosition(0L), mMidiFile(midiFile), mByteCount(0)
{
	::memcpy(mTrack,"MTrk",sizeof(mTrack));
}

inline
MidiTrack::~MidiTrack()
{
}

inline
void MidiTrack::setDeltaTime(DWORD eventTime)
{
  mDeltaTime=eventTime;
}

inline
DWORD MidiTrack::length(void)const
{
	return mLengthData;
}

inline
void MidiTrack::length(DWORD lengthData)
{
	mLengthData=lengthData;
}

inline
WORD MidiTrack::rewind(void)
{
	if(!mMidiFile.seek(mHeaderPosition,MemFile::SeekBeginning))return FALSE;
  return TRUE;
}

inline
void MidiTrack::setLocation(MemFile &midiFile)
{
	mLengthData=mDeltaTime=mByteCount=0;
  mHeaderPosition=midiFile.tell();
}
#endif