商业编程-源码-采用G.729的语言实时通信DLL.zip

// MixIn.cpp: implementation of the CMixIn class. // ////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "MixIn.h" #define WND_CLASS_NAME "Input Volume Msg Wnd Class" #define WND_NAME "Input Volume Msg Wnd" ////////////////////////////////////////////////////////////////////// // Construction/Destruction ////////////////////////////////////////////////////////////////////// static CMixIn *g_pThis = NULL; LRESULT CALLBACK CMixIn::MixerWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam ) { if ( uMsg == MM_MIXM_CONTROL_CHANGE ) { if ( g_pThis ) { g_pThis->OnControlChanged( (DWORD)lParam ); } } return ::DefWindowProc( hwnd, uMsg, wParam, lParam); } CMixIn::CMixIn() : m_iDevNum(0), m_uiMixerId(0), m_hMixer(0), m_hWnd(NULL), m_bIni(FALSE), m_dwMinimalVolume(0), m_dwMaximalVolume(100) { g_pThis = this; } CMixIn::~CMixIn() { } MMRESULT CMixIn::GetLastMMError() { return m_mmr; } CString CMixIn::GetLastErrorString() { char buffer[256]; memset(buffer,0,256); switch(m_mmr) { case MMSYSERR_NOERROR: sprintf(buffer,"No error."); break; case MIXERR_INVALCONTROL: sprintf(buffer,"Specified device handle is invalid."); break; case MMSYSERR_BADDEVICEID: sprintf(buffer,"The hmxobj parameter specifies an invalid device identifier."); break; case MMSYSERR_INVALFLAG: sprintf(buffer,"One or more flags are invalid."); break; case MMSYSERR_INVALHANDLE: sprintf(buffer,"The hmxobj parameter specifies an invalid handle."); break; case MMSYSERR_INVALPARAM: sprintf(buffer,"One or more parameters are invalid."); break; case MMSYSERR_NODRIVER: sprintf(buffer,"No mixer device is available for the object specified by hmxobj."); break; case MIXERR_INVALLINE: sprintf(buffer,"The audio line reference is invalid.."); break; case MMSYSERR_NOTSUPPORTED: sprintf(buffer,"The mixer device did not process the message."); break; case MMSYSERR_ALLOCATED: sprintf(buffer,"The specified resource is already allocated by the maximum number of clients possible."); break; case MMSYSERR_NOMEM: sprintf(buffer,"Unable to allocate resources."); break; default: sprintf(buffer,"Unknow error,Error code %d",m_mmr); break; } return buffer; } BOOL CMixIn::OpenMixer() { m_iDevNum = mixerGetNumDevs(); if (m_iDevNum == 0) { TRACE("There (is) are no device mixer.\n"); return FALSE; } WAVEFORMATEX wfx; memset( &wfx, 0, sizeof(WAVEFORMATEX) ); wfx.wFormatTag = WAVE_FORMAT_PCM; wfx.nChannels = 1; wfx.nSamplesPerSec = 8000; wfx.nAvgBytesPerSec = 1 * 8000 * 16 / 8; wfx.nBlockAlign = 16 * 1 / 8; wfx.wBitsPerSample = 16; wfx.cbSize = 0; HWAVEIN hwaveIn; m_mmr = waveInOpen( &hwaveIn, WAVE_MAPPER, &wfx, 0L, 0L, CALLBACK_NULL ); if ( m_mmr != MMSYSERR_NOERROR ) { return false; } m_mmr = mixerGetID((HMIXEROBJ)hwaveIn, &m_uiMixerId, MIXER_OBJECTF_HWAVEIN ); waveInClose( hwaveIn ); if ( m_mmr != MMSYSERR_NOERROR ) { return false; } // Exposing Window to Mixer WNDCLASSEX wcx; memset( &wcx, 0, sizeof(WNDCLASSEX) ); wcx.cbSize = sizeof(WNDCLASSEX); wcx.lpszClassName = WND_CLASS_NAME; wcx.lpfnWndProc = (WNDPROC)MixerWndProc; ::RegisterClassEx(&wcx); m_hWnd = CreateWindow( WND_CLASS_NAME, WND_NAME, WS_POPUP | WS_DISABLED, 0, 0, 0, 0, NULL, NULL, NULL, NULL ); if ( !m_hWnd ) { return false; } ::ShowWindow(m_hWnd, SW_HIDE); m_mmr = mixerOpen(&m_hMixer, m_uiMixerId, (DWORD)m_hWnd, 0L, CALLBACK_WINDOW ); if (m_mmr != MMSYSERR_NOERROR ) { return false; } return TRUE; } BOOL CMixIn::Initialize(UINT uLineIndex) { if (m_hMixer) { TRACE("You haven't open the mixer.\n"); return FALSE; } MIXERLINE MixerLine; memset( &MixerLine, 0, sizeof(MIXERLINE) ); MixerLine.cbStruct = sizeof(MIXERLINE); MixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN; MixerLine.dwSource = 1; m_mmr = mixerGetLineInfo( (HMIXEROBJ)m_hMixer, &MixerLine, MIXER_GETLINEINFOF_COMPONENTTYPE ); if ( m_mmr != MMSYSERR_NOERROR ) { return false; } MIXERCONTROL Control; memset( &Control, 0, sizeof(MIXERCONTROL)); Control.cbStruct = sizeof(MIXERCONTROL); MIXERLINECONTROLS LineControls; memset( &LineControls, 0, sizeof(MIXERLINECONTROLS)); LineControls.cbStruct = sizeof(MIXERLINECONTROLS); MIXERLINE Line; memset( &Line, 0, sizeof(MIXERLINE) ); Line.cbStruct = sizeof(MIXERLINE); if ((uLineIndex < MixerLine.cConnections)) { Line.dwDestination = MixerLine.dwDestination; Line.dwSource = uLineIndex; m_mmr = mixerGetLineInfo((HMIXEROBJ)m_hMixer, &Line, MIXER_GETLINEINFOF_SOURCE ); if ( m_mmr != MMSYSERR_NOERROR ) { return false; } LineControls.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME; LineControls.dwLineID = Line.dwLineID; LineControls.cControls = 1; LineControls.cbmxctrl = sizeof(MIXERCONTROL); LineControls.pamxctrl = &Control; m_mmr = mixerGetLineControls( (HMIXEROBJ)m_hMixer, &LineControls, MIXER_GETLINECONTROLSF_ONEBYTYPE ); if ( m_mmr == MMSYSERR_NOERROR ) { if ((Control.fdwControl & MIXERCONTROL_CONTROLF_DISABLED) ) { return FALSE; } } else { return FALSE; } } else { return false; } m_dwMinimalVolume = Control.Bounds.dwMinimum; m_dwMaximalVolume = Control.Bounds.dwMaximum; return TRUE; } BOOL CMixIn::EnumerateInputLines(int &dwUserValue) { if (!m_hMixer) { TRACE("Handle of mix hasn't been get.\n"); return FALSE; } MIXERLINE MixerLine; memset( &MixerLine, 0, sizeof(MIXERLINE) ); MixerLine.cbStruct = sizeof(MIXERLINE); MixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT ; m_mmr = mixerGetLineInfo( (HMIXEROBJ)m_hMixer, &MixerLine, MIXER_GETLINEINFOF_COMPONENTTYPE ); if (m_mmr != MMSYSERR_NOERROR ) { return false; } MIXERLINE Line; for (UINT uLineIndex = 0; uLineIndex < MixerLine.cConnections; uLineIndex++ ) { memset( &Line, 0, sizeof(MIXERLINE)); Line.cbStruct = sizeof(MIXERLINE); Line.dwDestination = MixerLine.dwDestination; Line.dwSource = uLineIndex; m_mmr = mixerGetLineInfo((HMIXEROBJ)m_hMixer, &Line, MIXER_GETLINEINFOF_SOURCE ); if (m_mmr != MMSYSERR_NOERROR ) { return false; } if ( Line.dwComponentType == MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE ) { dwUserValue = uLineIndex; break; } } return true; } BOOL CMixIn::CloseMixer() { if (m_hMixer) { m_mmr = mixerClose((HMIXER)m_hMixer); if (m_mmr != MMSYSERR_NOERROR ) { return false; } } return TRUE; } BOOL CMixIn::Ini() { if (m_bIni) { TRACE("Mix in has alreadly ini.\n"); return FALSE; } if (!OpenMixer()) { TRACE("%s.\n",GetLastErrorString()); return FALSE; }; int i=-1; EnumerateInputLines(i); if(i != -1) { if (!Initialize(i)) { TRACE("%s.\n",GetLastErrorString()); }; } m_bIni = TRUE; return TRUE; } BOOL CMixIn::UnIni() { if (!m_bIni) { TRACE("Mix in hasn't ini.\n"); return FALSE; } ::DestroyWindow( m_hWnd ); CloseMixer(); m_iDevNum = 0; m_uiMixerId = 0; m_hMixer = 0; m_hWnd = NULL; m_bIni = FALSE; m_dwMinimalVolume = 0; m_dwMaximalVolume = 100; return TRUE; } void CMixIn::OnControlChanged(int iValue) { } DWORD CMixIn::GetMinimalVolume() { if (!m_bIni) { TRACE("Mix in hasn't ini.\n"); return 0; } return this->m_dwMinimalVolume ; } DWORD CMixIn::GetMaximalVolume() { if (!m_bIni) { TRACE("Mix in hasn't ini.\n"); return 100; } return this->m_dwMaximalVolume ; } DWORD CMixIn::GetCurrentVolume() { if (!m_bIni) { TRACE("Mix in hasn't ini.\n"); return 0; } return 0; } void CMixIn::SetCurrentVolume(DWORD dwValue) { }