Audio

开发平台：

Visual C++

WaveOut.h：源码内容

							#ifndef _WAVEOUT_H_
#define _WAVEOUT_H_
#define HERTZ_POOR		8000
#define HERTZ_LOW		11025
#define HERTZ_NORMAL	22050
#define HERTZ_HIGH		44100
#define PLAY_DELAY 5
#include <mmsystem.h>
#include <afxmt.h>
//音频输出(播放数字音频)-将音频数据在硬件上进行播放
class CWaveOut
{
private:
	static void CALLBACK waveOutProc(HWAVEOUT hwo,UINT uMsg,DWORD dwInstance,DWORD dwParam1,DWORD dwParam2);
private:
	WAVEOUTCAPS	waveCaps;
	BOOL		bDevOpen;
	HWAVEOUT	m_hWave;
private:
    WORD		nChannels; 
    DWORD		dwHertZ; 
    WORD		wBits;
private:
	CCriticalSection	m_Lock;
	int			m_BufferQueue;
	inline int GetBufferNum();
	inline void AddBuffer();
	inline void SubBuffer();
private:
	BOOL Open();
	void Close();
public:
	CWaveOut();
	~CWaveOut();
//check
public:
	BOOL IsExistDevice();
	WAVEOUTCAPS* GetDeviceCap();
//setting
public:
	enum CHANNEL { SINGLE ,  STEREO };
	inline void SetChannel(CHANNEL Channel);
	inline void SetHertZ(DWORD HertZ);
	inline void SetBit(WORD Bits);
//operation
public:
	BOOL Start();
	BOOL Play(char* buf,UINT nSize);
	void Stop();
};
inline void CWaveOut::SetChannel(CHANNEL Channel)
{
	switch( Channel )
	{
	case SINGLE:
		nChannels = 1;
		break;
	case STEREO:
		nChannels = 2;
		break;
	}
}
inline void CWaveOut::SetHertZ(DWORD HertZ)
{
	dwHertZ = HertZ;
}
inline void CWaveOut::SetBit(WORD Bits)
{
	wBits = Bits;
}
inline int CWaveOut::GetBufferNum()
{
	int nRet = 5;
	m_Lock.Lock();
	nRet = m_BufferQueue;
	m_Lock.Unlock();
	return nRet;
}
inline void CWaveOut::AddBuffer()
{
	m_Lock.Lock();
	m_BufferQueue++;
	m_Lock.Unlock();
}
inline void CWaveOut::SubBuffer()
{
	m_Lock.Lock();
	m_BufferQueue--;
	m_Lock.Unlock();
}
#endif

						