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SoundOut.cpp
Package: gene_output_sound_class.zip [view]
Upload User: wen82zi81
Upload Date: 2007-01-03
Package Size: 40k
Code Size: 10k
Category:
Multimedia Develop
Development Platform:
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.
- MODIFICATION:
- - CallBack function implementation
- - Double buffer to feed the sound system
- */
- //////////////////////////////////////////////////////////////////////////////////////////
- #include "stdafx.h"
- #include "math.h"
- #include "snd.h"
- #include "SoundOut.h"
- #pragma comment(lib, "winmm")
- /////////////////////////////////////////////////////////////////////////////////////////////
- // comment this line to compile with a thread implementation rather than a callback function
- //#define CALL_BACK_TEST
- /////////////////////////////////////////////////////////////////////////////////////////////
- #ifdef _DEBUG
- #undef THIS_FILE
- static char THIS_FILE[]=__FILE__;
- #define new DEBUG_NEW
- #endif
- #define real double
- UINT WaveOutThreadProc(void * pParam);
- void CALLBACK WaveOutProc(HWAVEOUT hwo,UINT uMsg,DWORD dwInstance,DWORD dwParam1,DWORD dwParam2);
- //////////////////////////////////////////////////////////////////////
- // Construction/Destruction
- //////////////////////////////////////////////////////////////////////
- CSoundOut::CSoundOut()
- {
- m_NbMaxSamples = MAX_OUTPUT_SAMPLES;
- m_WaveOutSampleRate = 11025;
- m_Toggle = 0;
- }
- 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 !"));
- }
- m_Terminate = FALSE;
- #ifndef CALL_BACK_TEST
- // The SoundOut Devive is OK now we can create an Event and start the Thread
- m_WaveOutEvent = CreateEvent(NULL,FALSE,FALSE,"WaveOutThreadEvent");
- m_WaveOutThread= AfxBeginThread(WaveOutThreadProc,this,THREAD_PRIORITY_TIME_CRITICAL,0,CREATE_SUSPENDED,NULL);
- m_WaveOutThread->m_bAutoDelete = TRUE;
- #endif
- // start the thread at the end of the buffer init
- // init format
- WaveInitFormat(1/* mono*/,m_WaveOutSampleRate /* khz */,16 /* bits */);
- // Open Output
- #ifdef CALL_BACK_TEST
- result = waveOutOpen( &m_WaveOut,0, &m_WaveFormat,(DWORD)WaveOutProc ,(ULONG)this ,CALLBACK_FUNCTION);
- #else
- result = waveOutOpen( &m_WaveOut,0, &m_WaveFormat,(DWORD)m_WaveOutEvent ,NULL ,CALLBACK_EVENT);
- #endif
- if ( result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T("Sound output Cannot Open Device!"));
- return result;
- }
- m_Toggle = 0;
- m_SizeRecord = m_NbMaxSamples;
- m_WaveHeader[m_Toggle].lpData = (CHAR *)&OutputBuffer[m_Toggle][0];
- m_WaveHeader[m_Toggle].dwBufferLength = m_SizeRecord*2;
- m_WaveHeader[m_Toggle].dwFlags = 0;
- result = waveOutPrepareHeader( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- //MMRESULT waveOutPrepareHeader( HWAVEOUT hwi, LPWAVEHDR pwh, UINT cbwh );
- if ( (result!= MMSYSERR_NOERROR) || ( m_WaveHeader[m_Toggle].dwFlags != WHDR_PREPARED) )
- {
- AfxMessageBox(_T(" Sound Output Cannot Prepare Header !"));
- return result;
- }
- result = waveOutWrite( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T(" Sound Output Cannot Write Buffer !"));
- return result;
- }
- // register the second frame don't wait for the end of the first one
- // so when we will be notified, this second frame will be currently output when we will reload the first one
- m_Toggle = 1;
- m_SizeRecord = m_NbMaxSamples;
- m_WaveHeader[m_Toggle].lpData = (CHAR *)&OutputBuffer[m_Toggle][0];
- m_WaveHeader[m_Toggle].dwBufferLength = m_SizeRecord*2;
- m_WaveHeader[m_Toggle].dwFlags = 0;
- result = waveOutPrepareHeader( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- //MMRESULT waveOutPrepareHeader( HWAVEOUT hwi, LPWAVEHDR pwh, UINT cbwh );
- if ( (result!= MMSYSERR_NOERROR) || ( m_WaveHeader[m_Toggle].dwFlags != WHDR_PREPARED) )
- {
- AfxMessageBox(_T(" Sound Output Cannot Prepare Header !"));
- return result;
- }
- result = waveOutWrite( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T(" Sound Output Cannot Write Buffer !"));
- return result;
- }
- #ifndef CALL_BACK_TEST
- m_WaveOutThread->ResumeThread();
- #endif
- return result;
- }
- void CSoundOut::AddBuffer()
- {
- MMRESULT result;
- if (m_Toggle == 0)
- m_Toggle = 1;
- else
- m_Toggle = 0;
- result = waveOutUnprepareHeader( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- {
- AfxMessageBox(_T("Sound output Cannot UnPrepareHeader !"));
- return;
- };
- m_SizeRecord = m_NbMaxSamples;
- m_WaveHeader[m_Toggle].lpData = (CHAR *)&OutputBuffer[m_Toggle][0];
- m_WaveHeader[m_Toggle].dwBufferLength = m_SizeRecord *2;
- m_WaveHeader[m_Toggle].dwLoops = 0;
- m_WaveHeader[m_Toggle].dwFlags = 0; //WHDR_BEGINLOOP ;
- result = waveOutPrepareHeader( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- if ( (result!= MMSYSERR_NOERROR) || ( m_WaveHeader[m_Toggle].dwFlags != WHDR_PREPARED) )
- AfxMessageBox(_T("Sound output Cannot Prepare Header !"));
- result = waveOutWrite( m_WaveOut, &m_WaveHeader[m_Toggle], sizeof(WAVEHDR) );
- if (result!= MMSYSERR_NOERROR)
- AfxMessageBox(_T("Sound output Cannot Add Buffer !"));
- }
- /*
- 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_Terminate = 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[0][i] = 0;
- OutputBuffer[1][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(PT_S->m_WaveOutEvent,INFINITE);
- FirstPass = FALSE;
- while (!PT_S->m_Terminate)
- {
- result = WaitForSingleObject(PT_S->m_WaveOutEvent,INFINITE);
- if ((result == WAIT_OBJECT_0)&&(!PT_S->m_Terminate ))
- {
- PT_S->AddBuffer(); // Toggle as changed state here !Toggle point to the just received buffer
- PT_S->ComputeSamples(&PT_S->m_Toggle);
- }
- else
- return 0; //
- }
- return 0;
- }
- /////////////////////////////////////////////////////////////////////////////////////////////////////////////
- // Test with a callback function instead of a thread
- //
- ////////////////////////////////////////////////////////////////////////////////////////////////////////////
- #ifdef CALL_BACK_TEST
- void CALLBACK WaveOutProc(HWAVEOUT hwo,UINT uMsg,DWORD pParam,DWORD dwParam1,DWORD dwParam2)
- {
- if (!PT_S->m_Terminate )
- switch (uMsg)
- {
- case WOM_DONE:
- PT_S->AddBuffer();
- PT_S->ComputeSamples(&PT_S->m_Toggle);
- break;
- case WOM_OPEN:
- break;
- case WOM_CLOSE:
- break;
- }
- }
- #endif