www.pudn.com > vc-network-communication.rar > wavein.cpp

//NetTalk 
/*------------------------------------------------------------------------------*\ 
 ============================= 
   模块名称: wavein.cpp 
 ============================= 
  
 [版权] 
  
   2000-2002  115软件工厂  版权所有 
                                               
\*------------------------------------------------------------------------------*/ 
#include  
#include "wavein.h" 
#pragma comment(lib,"Winmm") 
/*------------------------------------------------------------------------------*/ 
void waveInErrorMsg(MMRESULT mmr,char* szTitle) 
{ 
	char txt[MAXERRORLENGTH]; 
	waveInGetErrorText(mmr,txt,MAXERRORLENGTH); 
	MessageBox(0,txt,szTitle,MB_OK|MB_ICONWARNING); 
} 
/*------------------------------------------------------------------------------*/ 
CWaveIn::CWaveIn() 
{ 
	m_mmr=0; 
	 
	m_hIn=0;	 
} 
/*------------------------------------------------------------------------------*/ 
//打开录音设备 
BOOL CWaveIn::OpenDev(WAVEFORMATEX* pfmt,DWORD dwCallback,DWORD dwCallbackInstance,DWORD fdwOpen) 
{ 
	BOOL bRet=FALSE; 
	WAVEFORMATEX wf; 
	if(!pfmt)//默认格式 
	{ 
	 
		 
		wf.wFormatTag	= WAVE_FORMAT_PCM; 
		wf.cbSize		= 0; 
		wf.wBitsPerSample=16; 
		wf.nSamplesPerSec=8000; 
		wf.nChannels=1; 
		wf.nAvgBytesPerSec	= wf.nSamplesPerSec*(wf.wBitsPerSample/8); 
		wf.nBlockAlign		= wf.nChannels     *(wf.wBitsPerSample/8); 
		pfmt=&wf; 
	} 
	MMRESULT mmr; 
	mmr=waveInOpen(0,WAVE_MAPPER,pfmt,0,0,WAVE_FORMAT_QUERY); 
	if(mmr) 
	{ 
		SetLastMMError(mmr); 
		goto RET; 
	} 
	mmr=waveInOpen(&m_hIn,WAVE_MAPPER,pfmt,dwCallback,dwCallbackInstance,fdwOpen); 
	if(mmr) 
	{ 
		 
		 
		SetLastMMError(mmr); 
		goto RET; 
	} 
	bRet=TRUE; 
RET: 
	return bRet; 
} 
/*------------------------------------------------------------------------------*/ 
CWaveIn::operator HWAVEIN() const 
{ 
	return m_hIn; 
} 
/*------------------------------------------------------------------------------*/ 
CWaveIn::~CWaveIn() 
{ 
	 
} 
/*------------------------------------------------------------------------------*/ 
MMRESULT CWaveIn::GetLastMMError() 
{ 
	return m_mmr; 
} 
/*------------------------------------------------------------------------------*/ 
void CWaveIn::SetLastMMError(MMRESULT mmr) 
{ 
	m_mmr=mmr; 
} 
/*------------------------------------------------------------------------------*/ 
//该死的死锁!就出现在这里 
BOOL CWaveIn::CloseDev() 
{ 
	BOOL bRet=FALSE; 
	if(!m_hIn) 
		goto RET; 
	m_mmr=waveInReset(m_hIn); 
	if(m_mmr) 
		goto RET; 
	m_mmr=waveInClose(m_hIn); 
	if(m_mmr) 
		goto RET; 
	m_hIn=0; 
	bRet=TRUE; 
RET: 
	return bRet; 
} 
/*------------------------------------------------------------------------------*/ 
HWAVEIN CWaveIn::GetHandle() 
{ 
	return m_hIn; 
}