wavein.h

截取wave通过g.729在网上压缩传输

#ifndef	_WAVEIN_H_
#define	_WAVEIN_H_

#define HERTZ_POOR		8000
#define HERTZ_LOW		11025
#define HERTZ_NORMAL	22050
#define HERTZ_HIGH		44100

#define NUM_BUF 5
#define SIZE_AUDIO_FRAME 4800
//#define SIZE_AUDIO_PACKED 240

#include <mmsystem.h>

//音频输入(得到音频数据)-从硬件上得到音频数据
class CWaveIn
{
private:
	WAVEINCAPS 	waveCaps;
	BOOL		bDevOpen;
	BOOL		bStartData;
	BOOL		bBuffer;
	HWAVEIN		m_hWave;

	WAVEHDR*	m_pHead;

	HWND		m_hWnd;
private:
    WORD		nChannels; 
    DWORD		dwHertZ; 
    WORD		wBits;

private:
	BOOL Open();
	BOOL StartData();
	void Close();
	void CloseData();
	BOOL PerpareBuffer();
	void UnperpareBuffer();
	void FreeBuffer();

public:
	CWaveIn();
	~CWaveIn();

//check
public:
	BOOL IsExistDevice();
	WAVEINCAPS * GetDeviceCap();
	BOOL IsOpen() { return bDevOpen;}

//setting
public:
	enum CHANNEL { SINGLE ,  STEREO };
	inline void SetChannel(CHANNEL Channel);
	inline void SetHertZ(DWORD HertZ);
	inline void SetBit(WORD Bits);

	inline void SetHwnd(HWND hWnd);
//operation
public:
	BOOL Start();
	void Stop();
};

inline void CWaveIn::SetChannel(CHANNEL Channel)
{
	switch( Channel )
	{
	case SINGLE:
		nChannels = 1;
		break;
	case STEREO:
		nChannels = 2;
		break;
	}
}

inline void CWaveIn::SetHertZ(DWORD HertZ)
{
	dwHertZ = HertZ;
}

inline void CWaveIn::SetBit(WORD Bits)
{
	wBits = Bits;
}

inline void CWaveIn::SetHwnd(HWND hWnd)
{
	m_hWnd = hWnd;
}

#endif