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// DSBuffer.h : Definition of CDSBuffer class 
// 
 
#if !defined(AFX_DSBUFFER_H__7517D749_96E3_11D2_BBF3_9EB4940D843C__INCLUDED_) 
#define AFX_DSBUFFER_H__7517D749_96E3_11D2_BBF3_9EB4940D843C__INCLUDED_ 
 
#if _MSC_VER > 1000 
#pragma once 
#endif // _MSC_VER > 1000 
 
#include  
#include  
 
//设置如下两个全局变量控制音量： 
extern int   m_nBkGrdVolume; //用于控制背景音乐音量大小 
extern int   m_nYinXiaoVolume; //用于控制音效音量大小 
 
//wav文件头格式 
struct WaveHeader 
{ 
	BYTE        RIFF[4];          // "RIFF" 
	DWORD       dwSize;           // Size of data to follow 
	BYTE        WAVE[4];          // "WAVE" 
	BYTE        fmt_[4];          // "fmt " 
	DWORD       dw16;             // 16 
	WORD        wOne_0;           // 1 
	WORD        wChnls;           // Number of Channels 
	DWORD       dwSRate;          // Sample Rate 
	DWORD       BytesPerSec;      // Sample Rate 
	WORD        wBlkAlign;        // 1 
	WORD        BitsPerSample;    // Sample size 
	BYTE        DATA[4];          // "DATA" 
	DWORD       dwDSize;          // Number of Samples 
}; 
 
class CDSBuffer : public CObject 
{ 
// Attribute 
protected: 
	LPDIRECTSOUNDBUFFER		m_lpDSBuffer;			// 声音缓冲区对象 
 
public: 
	CDSBuffer(); 
	CDSBuffer(const char* FileName,BOOL m_bBackGroundMusic,LPDIRECTSOUND lpDS,DWORD dwFlags = DSBCAPS_CTRLVOLUME ); 
	~CDSBuffer(); 
 
public: 
	BOOL	PlaySound(BOOL bContinue=FALSE);     //播放声音 
	BOOL	StopSound();						 //停止播放 
	BOOL	CreateSoundBuffer(LPDIRECTSOUND lpDS, DWORD dwFlags, DWORD dwBufSize, DWORD dwFreq, DWORD dwBitsPerSample, DWORD dwBlkAlign, BOOL bStereo); 
	BOOL	ReadData(FILE* pFile, DWORD dwSize, DWORD dwPos); 
	BOOL	IsValid(); 
	LPDIRECTSOUNDBUFFER		GetBuffer() { return m_lpDSBuffer;} 
	void SetVolume(int percent=50);   //设置音量 
	void VolumeDown(int percent=10);  //音量增大(percent为百分数，范围为 
	void VolumeUp(int percent=10);    //音量减小  1~100)  
	 
private: 
	BOOL    m_bBkGrdMusic;            //是否是背景音乐，TRUE为是 
}; 
 
 
#endif // !defined(AFX_DSBUFFER_H__7517D749_96E3_11D2_BBF3_9EB4940D843C__INCLUDED_)