// WaveFileSouce.h: interface for the WaveFileSouce class.
//
//////////////////////////////////////////////////////////////////////

#ifndef AFX_WAVEFILESOURCE_H__79D1D906_37F1_4F0C_BE82_8B23848FE677__INCLUDED_
#define AFX_WAVEFILESOURCE_H__79D1D906_37F1_4F0C_BE82_8B23848FE677__INCLUDED_

#include "AudioSource.h"
#include "Parameters.h"
#include "EventSource.h"
#include <mmsystem.h>

enum WaveFileSourceEvents
{
	FILE_STARTED = 0,
	FILE_STOPPED = 1
};

class WaveFileSourceListener;

class WaveFileSource : 
	public AudioSource,
	public EventSource
{

	class FireEventThreadParams
	{
	public:
		WaveFileSource *waveFileSource;
		int eventType;
		char waveFileName[1024];
	};

public:
	WaveFileSource();
	virtual ~WaveFileSource();
	int SourceStarted();
	int SourceStopped();
	int	SourceThreadStarted(HANDLE sourceThreadHandle, DWORD sourceThreadID);
	int	SourceThreadStopped(HANDLE sourceThreadHandle, DWORD sourceThreadID);
	int OpenWaveFile(const char *inputFileName);
	int GetFormat(WAVEFORMATEX *wfx);
	int SetBufferDuration(int bufferDurationMillisec);
	int	AddFilePlayListener(WaveFileSourceListener *waveFileSourceListener);
	int RemoveFilePlayListener(WaveFileSourceListener *waveFileSourceListener);
	int PlayInLoop();
	int PlayOnce();
protected:
	virtual int GenerateData(AudioSample **ppAudioSample);
	virtual int SetTraceLevel();
private:
	int FireEvent(int eventType, char *waveFileName);
	int CloseMMIO();
	static DWORD WINAPI FireEventThread(LPVOID param);
private:
    char        szFileName[128];    // filename of file to open 
    HMMIO       hmmio;              // file handle for open file 
    MMCKINFO    mmckinfoParent;     // parent chunk information 
    MMCKINFO    mmckinfoSubchunk;   // subchunk information structure 
    DWORD       dwFmtSize;          // size of "FMT" chunk 
    DWORD       dwDataSize;         // size of "DATA" chunk 
    WAVEFORMATEX *pFormat;          // address of "FMT" chunk 
    HPSTR       lpData;             // address of "DATA" chunk
	int			bufferDuration;		// duration of audio to put in each buffer
	bool		bRunning;			// whether the filter is running
	LONG		dataStartPosition;	// start file position of the data part (for looping playback)
	bool		looping;			// whether the file is to be played in a loop
	CRITICAL_SECTION filterMutex;	// mutex for the filter
};

class WaveFileSourceListener
{
public:
	virtual void FilePlayStarted(WaveFileSource *waveFileSource, char *waveFileName);
	virtual void FilePlayStopped(WaveFileSource *waveFileSource, char *waveFileName);
};

#endif // !defined(AFX_WAVEFILESOUCE_H__79D1D906_37F1_4F0C_BE82_8B23848FE677__INCLUDED_)