SOUNDOUT.CPP
资源名称:AudioWave.rar [点击查看]
上传用户:huifengb
上传日期:2007-12-27
资源大小:334k
文件大小:9k
源码类别:
多媒体
开发平台:
Visual C++
- // SoundOut.cpp: implementation of the CSoundOut class.
- //
- //////////////////////////////////////////////////////////////////////
- /*
- This program is Developped by Yannick Sustrac
- yannstrc@mail.dotcom.fr
- http://www.mygale.org/~yannstrc/
- This program is free software; you can redistribute it and/or modify it under the terms
- of the GNU General Public License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
- without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- See the GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along with this program;
- if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- //////////////////////////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include "math.h"
- #include "SoundOut.h"
- #pragma comment(lib, "winmm")
- #ifdef _DEBUG
- #undef THIS_FILE
- static char THIS_FILE[]=__FILE__;
- #define new DEBUG_NEW
- #endif
- #define real double
- //void CALLBACK waveOutProc( HWAVEOut hwi, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 );
- UINT WaveOutThreadProc(void * pParam);
- //////////////////////////////////////////////////////////////////////
- // Construction/Destruction
- //////////////////////////////////////////////////////////////////////
- CSoundOut::CSoundOut()
- {
- // int i;
- // double k;
- m_NbMaxSamples = MAX_OUTPUT_SAMPLES;
- m_WaveOutSampleRate = 11025;
- /* init the sound Ouutput buffer with a signal noise */
- // k =2.0*3.1416*(double)500.0/(double)m_WaveOutSampleRate;
- // for (i = 0 ; i< m_NbMaxSamples; i++)
- // OutputBuffer[i] = (SHORT)(10000.0*sin(k*(double)i++)) ;
- memset(OutputBuffer, 0, sizeof(short)*m_NbMaxSamples);
- }
- CSoundOut::~CSoundOut()
- {
- CloseOutput();
- }
- ///////////////////////////////////////////////////////////////////
- MMRESULT CSoundOut::OpenOutput()
- {
- MMRESULT result;
- result=waveOutGetNumDevs();
- if (result == 0)
- {
- AfxMessageBox("No Sound Output Device");
- return result;
- }
- // test for Mic available
- result=waveOutGetDevCaps (0, &m_WaveOutDevCaps, sizeof(WAVEOUTCAPS));
- if ( result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T("Sound output Cannot determine card capabilities !"));
- }
- // The SoundOut Devive is OK now we can create an Event and start the Thread
- m_WaveOutEvent = CreateEvent(NULL,FALSE,FALSE,"WaveOutThreadEvent");
- m_TerminateThread = FALSE;
- m_WaveOutThread= AfxBeginThread(WaveOutThreadProc,this,THREAD_PRIORITY_NORMAL,0,CREATE_SUSPENDED,NULL);
- m_WaveOutThread->m_bAutoDelete = TRUE;
- m_WaveOutThread->ResumeThread();
- // init format
- WaveInitFormat(1/* mono*/,m_WaveOutSampleRate /* khz */,16 /* bits */);
- // Open Output
- result = waveOutOpen( &m_WaveOut,0, &m_WaveFormat,(DWORD)m_WaveOutEvent ,NULL ,CALLBACK_EVENT);
- if ( result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T("Sound output Cannot Open Device!"));
- return result;
- }
- // prepare header
- /*
- typedef struct { LPSTR lpData;
- DWORD dwBufferLength;
- DWORD dwBytesRecorded;
- DWORD dwUser;
- DWORD dwFlags;
- DWORD dwLoops;
- struct wavehdr_tag * lpNext;
- DWORD reserved;
- } WAVEHDR;
- */
- // m_Toggle = FALSE;
- m_SizeRecord = m_NbMaxSamples;
- m_WaveHeader.lpData = (CHAR *)&OutputBuffer[0];
- m_WaveHeader.dwBufferLength = m_SizeRecord*2;
- m_WaveHeader.dwFlags = 0;
- result = waveOutPrepareHeader( m_WaveOut, &m_WaveHeader, sizeof(WAVEHDR) );
- //MMRESULT waveOutPrepareHeader( HWAVEOUT hwi, LPWAVEHDR pwh, UINT cbwh );
- if ( (result!= MMSYSERR_NOERROR) || ( m_WaveHeader.dwFlags != WHDR_PREPARED) )
- {
- AfxMessageBox(_T(" Sound Output Cannot Prepare Header !"));
- return result;
- }
- result = waveOutWrite( m_WaveOut, &m_WaveHeader, sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T(" Sound Output Cannot Write Buffer !"));
- return result;
- }
- // all is correct now we can start the process
- result = waveOutRestart( m_WaveOut );
- if (result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T(" Sound Output Cannot Start Wave Out !"));
- return result;
- }
- return result;
- }
- void CSoundOut::AddBuffer()
- {
- MMRESULT result;
- result = waveOutUnprepareHeader( m_WaveOut, &m_WaveHeader, sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- {
- //AfxMessageBox(_T("Sound output Cannot UnPrepareHeader !"));
- return;
- };
- m_SizeRecord = m_NbMaxSamples;
- m_WaveHeader.lpData = (CHAR *)&OutputBuffer[0];
- m_WaveHeader.dwBufferLength = m_SizeRecord *2;
- m_WaveHeader.dwFlags = 0;
- result = waveOutPrepareHeader( m_WaveOut, &m_WaveHeader, sizeof(WAVEHDR) );
- //MMRESULT waveOutPrepareHeader( HWAVEOUT hwi, LPWAVEHDR pwh, UINT cbwh );
- if ( (result!= MMSYSERR_NOERROR) || ( m_WaveHeader.dwFlags != WHDR_PREPARED) )
- AfxMessageBox(_T("Sound output Cannot Prepare Header !"));
- result = waveOutWrite( m_WaveOut, &m_WaveHeader, sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- AfxMessageBox(_T("Sound output Cannot Add Buffer !"));
- result = waveOutRestart( m_WaveOut );
- if (result!= MMSYSERR_NOERROR)
- AfxMessageBox(_T(" Sound Output Cannot Start Wave Out !"));
- }
- void CSoundOut::SendBuffer(short *psOutPutBuffer)
- {
- for(int i=0; i<m_NbMaxSamples; i++)
- {
- OutputBuffer[i] = psOutPutBuffer[i];
- }
- // memcpy(OutputBuffer, psOutPutBuffer, sizeof(short)*m_NbMaxSamples);
- }
- /*
- WAVE_FORMAT_1M08 11.025 kHz, mono, 8-bit
- WAVE_FORMAT_1M16 11.025 kHz, mono, 16-bit
- WAVE_FORMAT_1S08 11.025 kHz, stereo, 8-bit
- WAVE_FORMAT_1S16 11.025 kHz, stereo, 16-bit
- WAVE_FORMAT_2M08 22.05 kHz, mono, 8-bit
- WAVE_FORMAT_2M16 22.05 kHz, mono, 16-bit
- WAVE_FORMAT_2S08 22.05 kHz, stereo, 8-bit
- WAVE_FORMAT_2S16 22.05 kHz, stereo, 16-bit
- WAVE_FORMAT_4M08 44.1 kHz, mono, 8-bit
- WAVE_FORMAT_4M16 44.1 kHz, mono, 16-bit
- WAVE_FORMAT_4S08 44.1 kHz, stereo, 8-bit
- WAVE_FORMAT_4S16 44.1 kHz, stereo, 16-bit
- */
- void CSoundOut:: WaveInitFormat( WORD nCh, // number of channels (mono, stereo)
- DWORD nSampleRate, // sample rate
- WORD BitsPerSample)
- {
- m_WaveFormat.wFormatTag = WAVE_FORMAT_PCM;
- m_WaveFormat.nChannels = nCh;
- m_WaveFormat.nSamplesPerSec = nSampleRate;
- m_WaveFormat.nAvgBytesPerSec = nSampleRate * nCh * BitsPerSample/8;
- m_WaveFormat.nBlockAlign = m_WaveFormat.nChannels * BitsPerSample/8;
- m_WaveFormat.wBitsPerSample = BitsPerSample;
- m_WaveFormat.cbSize = 0;
- }
- ///////////////////////////////////////////////////////////////////////////
- // the comutation for the Output samples need to be calibrated according
- // to the SoundOut board add an Offset and a Mult coef.
- void CSoundOut::ComputeSamples(SHORT *pt)
- {
- }
- void CSoundOut::CloseOutput()
- {
- if (m_WaveOut)
- waveOutPause(m_WaveOut);
- Sleep(50); // wait for the pause
- // CloseHandle(m_WaveOut);
- m_TerminateThread = TRUE;
- if (m_WaveOutEvent )
- SetEvent(m_WaveOutEvent);
- Sleep(50); // wait for the thread to terminate
- if (m_WaveOut)
- {
- waveOutReset(m_WaveOut);
- waveOutClose(m_WaveOut);
- }
- }
- void CSoundOut::RazBuffers()
- {
- for (int i=0;i<MAX_OUTPUT_SAMPLES;i++)
- {
- OutputBuffer[i] = 0;
- }
- }
- void CSoundOut::StopOutput()
- {
- waveOutPause(m_WaveOut);
- }
- void CSoundOut::StartOutput()
- {
- waveOutRestart(m_WaveOut);
- }
- /////////////////////////////////////////////////////////////////////////////////////////////////////////////
- // Glogal Thread procedure for the CSoundOut class
- // It cannot be included inside the Class
- //
- // The LPARAM is the Class pointer it can be the base class CSoundOut
- // or a drived class like CFft
- // The value of this parametre can change according because
- // OpenMic() call a virtual funtion
- /////////////////////////////////////////////////////////////////////////////////////////////////////////////
- #define PT_S ((CSoundOut*)pParam)
- UINT WaveOutThreadProc(void * pParam)
- {
- // CSoundOut * SoundOut = (class CSoundOut *)pParam;
- UINT result;
- UINT FirstPass = TRUE;
- if ( FirstPass)
- result = WaitForSingleObject(((CSoundOut*)pParam)->m_WaveOutEvent,INFINITE);
- FirstPass = FALSE;
- while (!((CSoundOut*)pParam)->m_TerminateThread)
- {
- result = WaitForSingleObject(((CSoundOut*)pParam)->m_WaveOutEvent,INFINITE);
- if ((result == WAIT_OBJECT_0)&&(!((CSoundOut*)pParam)->m_TerminateThread ))
- {
- PT_S->AddBuffer(); // Toggle as changed state here !Toggle point to the just received buffer
- PT_S->ComputeSamples(PT_S->OutputBuffer);
- }
- else
- return 0; //
- }
- return 0;
- }