record.cpp

实现了录音,放音功能!在evc4.0下编译功过,wince5.0下能正常录音,放音,暂停录放音!

#include "stdafx.h"
//#include "Record.h"


buf_Mode ModeTab[3] = {
	{ 4, 2 },
	{ 8, 4 },                             
	{ 16, 8 },
};


#define MMRETCHECK(ret) \
if ( ret != MMSYSERR_NOERROR ) { return ret; } 

#define ICHECK(ret) \
if ( ret < 0 ) { return MMSYSERR_ERROR;	}

Record::Record(BufMode ModeKey, DWORD dwBufSiz):m_BUFBLKSIZE( ModeTab[ModeKey].ucSize ), m_BUFBLKUSED( ModeTab[ModeKey].ucUsed ), m_BufSiz(dwBufSiz)
{
	m_pCodecInterf = NULL;
	m_hevDone = NULL;
	m_pDataHdr = NULL;
	m_pEncData = NULL;
	m_fh = NULL;
}

Record::~Record()
{
}

MMRESULT Record::SetBufSiz(DWORD dwBufSiz)
{
	m_BufSiz = dwBufSiz;
	return MMSYSERR_NOERROR;
}

MMRESULT Record::InitRecord(WAVEFORMATEX & wfx)
{
	int i;

	m_pDataHdr = new WAVEHDR[m_BUFBLKSIZE];
	if ( NULL == m_pDataHdr )
	{
		return MMSYSERR_NOMEM;
	}
	memset(m_pDataHdr, 0, sizeof(WAVEHDR) * m_BUFBLKSIZE);
	for ( i = 0; i < m_BUFBLKSIZE; i++ )
	{
		m_pDataHdr[i].lpData = new CHAR[m_BufSiz];
		if ( NULL == m_pDataHdr[i].lpData )
		{
			for ( i--; i < 0; i-- )
			{
				delete [] m_pDataHdr[i].lpData;
			}
			delete [] m_pDataHdr;
			return MMSYSERR_NOMEM;
		}
		m_pDataHdr[i].dwBufferLength = m_BufSiz;
	}

	m_wfx = wfx;
	return MMSYSERR_NOERROR;
}

MMRESULT Record::ClosRecord()
{
	int i;
	
	if ( NULL == m_pDataHdr )
	{
		return MMSYSERR_ERROR;
	}
	for ( i = 0; i < m_BUFBLKSIZE; i++ )
	{
		if ( m_pDataHdr[i].lpData )
		{
			delete [] m_pDataHdr[i].lpData;
		}
	}
	delete [] m_pDataHdr;

	return MMSYSERR_NOERROR;
}

MMRESULT Record::OpenMic()
{
	int i;
	int iRet;
	MMRESULT ret;

	if ( 0 == waveInGetNumDevs() )
	{
		return MMSYSERR_NOTENABLED;
	}
	m_uiDeviceId = 0;
	m_hevDone = CreateEvent(NULL, FALSE, FALSE, NULL);
	if ( NULL == m_hevDone )
	{
		return MMSYSERR_NOMEM;
	}
	ret = waveInOpen(&m_hwi, m_uiDeviceId, &m_wfx, ( DWORD )m_hevDone, NULL, CALLBACK_EVENT);
	MMRETCHECK(ret);
	
	for ( i = 0; i < m_BUFBLKSIZE; i++ )
	{
		ret = waveInPrepareHeader(m_hwi, m_pDataHdr + i, sizeof(WAVEHDR));
		MMRETCHECK(ret);
	}
	for ( i = 0; i < m_BUFBLKUSED; i++ )
	{
		ret = waveInAddBuffer(m_hwi, m_pDataHdr + i, sizeof(WAVEHDR));
		MMRETCHECK(ret);
	}

	iRet = m_pCodecInterf->init(&m_Data);
	ICHECK(iRet);
	
	
	m_dwWaitTime = ( m_BufSiz * 8000 ) / ( m_wfx.nSamplesPerSec * m_wfx.wBitsPerSample * 2 );
	
	ret = waveInStart(m_hwi);
	MMRETCHECK(ret);
	
	m_BufNO = 0;
	m_dwPCMSiz = 0;

	return MMSYSERR_NOERROR;
}

MMRESULT Record::ToRec()
{
	int iRet;
	MMRESULT ret;
	BOOL bRet;
	DWORD dwWait;
	DWORD dwBytesWrot;

	dwWait = WaitForSingleObject(m_hevDone, m_dwWaitTime);
	if ( WAIT_OBJECT_0 == dwWait )
	{
		//  Encode audio data.
		iRet = m_pCodecInterf->encode(&m_Data, (void**)&m_pEncData, (INT32*)&m_EncDataSiz, (UINT8*)m_pDataHdr[m_BufNO].lpData, (INT32*)&(m_pDataHdr[m_BufNO].dwBufferLength));
		ICHECK(iRet);
		
		bRet = WriteFile(m_fh, m_pEncData, m_EncDataSiz, &dwBytesWrot, NULL);
		if (!bRet || dwBytesWrot < m_EncDataSiz)
		{
			return MMSYSERR_ERROR;
		}

//		bRet = WriteFile(m_fh, (UINT8*)m_pDataHdr[m_BufNO].lpData, m_pDataHdr[m_BufNO].dwBufferLength, &dwBytesWrot, NULL);
//		if (!bRet || dwBytesWrot < m_pDataHdr[m_BufNO].dwBufferLength) 
//		{
//			return MMSYSERR_ERROR;
//		}
//		m_dwPCMSiz += m_pDataHdr[m_BufNO].dwBufferLength;
		
		ret = waveInAddBuffer(m_hwi, m_pDataHdr + ((m_BufNO + m_BUFBLKUSED) % m_BUFBLKSIZE), sizeof(WAVEHDR));
		MMRETCHECK(ret);
		m_BufNO = (m_BufNO + 1) % m_BUFBLKSIZE;
		ResetEvent(m_hevDone);
	}
	return MMSYSERR_NOERROR;
}

void Record::SetCodecInterface(CodecInterfaceType& CodecInterf)
{
	m_pCodecInterf = &CodecInterf;
}

MMRESULT Record::ClosMic()
{
	int i;
	int iRet;
	MMRESULT ret;
	BOOL bret;
	
	ret = waveInReset(m_hwi);
	MMRETCHECK(ret);
	for (i = 0; i < m_BUFBLKSIZE; i++)
	{
		ret = waveInUnprepareHeader(m_hwi, m_pDataHdr + i, sizeof(WAVEHDR));
		MMRETCHECK(ret);
	}
	ret = waveInClose(m_hwi);
	MMRETCHECK(ret);
	
	iRet = m_pCodecInterf->close(&m_Data);
	ICHECK(iRet);
	
	bret = CloseHandle(m_hevDone);
	if (!bret)
	{
		return MMSYSERR_INVALHANDLE;
	}
	return MMSYSERR_NOERROR;
}

MMRESULT Record::ToPlay(LPCTSTR pszFileName)
{
	return MMSYSERR_NOERROR;
}

MMRESULT Record::ToPaus()
{
	return MMSYSERR_NOERROR;
}

MMRESULT Record::ToStop()
{
	return MMSYSERR_NOERROR;
}

Record & Recorder(BufMode ModeKey, DWORD dwBufSiz)
{
	static Record Apple(ModeKey, dwBufSiz);
	return Apple;
}