VolumeOutWave.cpp
上传用户:lywczg
上传日期:2007-01-03
资源大小:15k
文件大小:15k
- // VolumeOutWave.cpp : Module interface implementation.
- // Developer : Alex Chmut
- // Created : 8/11/98
- #include "StdAfx.h"
- #include "VolumeOutWave.h"
- /////////////////////////////////////////////////////////////////////////////
- // Defines
- #define BAD_DWORD (DWORD)-1
- #define WND_CLASS_NAME "Wave Output Volume Msg Wnd Class"
- #define WND_NAME "Wave Output Volume Msg Wnd"
- /////////////////////////////////////////////////////////////////////////////
- // Globals
- PCVolumeOutWave g_pThis = NULL;
- ////////////////////////////////////////////////////////////
- //{{{ Audio specific functions
- #define AUDFREQ 22050 // Frequency
- #define AUDCHANNELS 1 // Number of channels
- #define AUDBITSMPL 16 // Number of bits per sample
- inline
- void SetDeviceType( WAVEFORMATEX* pwfe )
- {
- memset( pwfe, 0, sizeof(WAVEFORMATEX) );
- WORD nBlockAlign = (AUDCHANNELS*AUDBITSMPL)/8;
- DWORD nSamplesPerSec = AUDFREQ;
- pwfe->wFormatTag = WAVE_FORMAT_PCM;
- pwfe->nChannels = AUDCHANNELS;
- pwfe->nBlockAlign = nBlockAlign;
- pwfe->nSamplesPerSec = nSamplesPerSec;
- pwfe->wBitsPerSample = AUDBITSMPL;
- pwfe->nAvgBytesPerSec = nSamplesPerSec*nBlockAlign;
- }
- //}}} Audio specific functions
- /////////////////////////////////////////////////////////////////////////////
- // Implementation
- //////////////
- CVolumeOutWave::CVolumeOutWave()
- : m_bOK(false),
- m_bInitialized(false),
- m_bAvailable(false),
- m_uMixerID(0L),
- m_dwMixerHandle(0L),
- m_hWnd(NULL),
- m_dwMinimalVolume(BAD_DWORD),
- m_dwMaximalVolume(BAD_DWORD),
- m_pfUserSink(NULL),
- m_dwUserValue(0L)
- {
- if ( m_bOK = Init() )
- {
- g_pThis = this;
- if ( !Initialize() )
- {
- Done();
- g_pThis = NULL;
- }
- }
- }
- //////////////
- CVolumeOutWave::~CVolumeOutWave()
- {
- if ( m_bOK )
- Done();
- g_pThis = NULL;
- }
- //////////////
- bool CVolumeOutWave::Init()
- {
- if ( !mixerGetNumDevs() )
- return false;
- // Getting Mixer ID
- HWAVEOUT hwaveOut;
- MMRESULT mmResult;
- WAVEFORMATEX WaveFmt;
- SetDeviceType( &WaveFmt );
- mmResult = waveOutOpen( &hwaveOut, WAVE_MAPPER, &WaveFmt, 0L, 0L, CALLBACK_NULL );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not open WaveOut Mapper. mmResult=%dn", mmResult );
- return false;
- } else {
- mmResult = mixerGetID( (HMIXEROBJ)hwaveOut, &m_uMixerID, MIXER_OBJECTF_HWAVEOUT );
- waveOutClose( hwaveOut );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: FAILURE: WaveOut Mapper in Mixer is not available. mmResult=%dn", mmResult );
- 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 )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not create internal window.n" );
- return false;
- }
- ::ShowWindow(m_hWnd, SW_HIDE);
- mmResult = mixerOpen( (LPHMIXER)&m_dwMixerHandle, m_uMixerID, (DWORD)m_hWnd, 0L, CALLBACK_WINDOW );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not open Mixer. mmResult=%dn", mmResult );
- ::DestroyWindow( m_hWnd );
- return false;
- }
- return true;
- }
- //////////////
- void CVolumeOutWave::Done()
- {
- if ( mixerClose( (HMIXER)m_dwMixerHandle ) != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: WARNING: Could not close Mixer.n" );
- }
- ::DestroyWindow( m_hWnd );
- m_bInitialized = false;
- m_bOK = false;
- }
- //////////////
- void CVolumeOutWave::OnControlChanged( DWORD dwControlID )
- {
- if ( m_dwVolumeControlID == dwControlID )
- {
- DWORD dwVolume = GetCurrentVolume();
- if ( (dwVolume!=BAD_DWORD) && (m_pfUserSink) )
- {
- (*m_pfUserSink)( dwVolume, m_dwUserValue );
- }
- }
- }
- //////////////
- bool CVolumeOutWave::Initialize()
- {
- MMRESULT mmResult;
- if ( !m_bOK )
- return false;
- TRACE(".WaveOutputVolume: Initializing for Source WaveOut Line ..n" );
- MIXERLINE MixerLine;
- memset( &MixerLine, 0, sizeof(MIXERLINE) );
- MixerLine.cbStruct = sizeof(MIXERLINE);
- MixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT;
- mmResult = mixerGetLineInfo( (HMIXEROBJ)m_dwMixerHandle, &MixerLine, MIXER_GETLINEINFOF_COMPONENTTYPE );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not get WaveOut Destionation Line for the WaveOut Source Line while initilaizing. mmResult=%dn", mmResult );
- return false;
- }
- MIXERCONTROL Control;
- memset( &Control, 0, sizeof(MIXERCONTROL) );
- Control.cbStruct = sizeof(MIXERCONTROL);
- MIXERLINECONTROLS LineControls;
- memset( &LineControls, 0, sizeof(MIXERLINECONTROLS) );
- LineControls.cbStruct = sizeof(MIXERLINECONTROLS);
- LineControls.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;
- LineControls.dwLineID = MixerLine.dwLineID;
- LineControls.cControls = 1;
- LineControls.cbmxctrl = sizeof(MIXERCONTROL);
- LineControls.pamxctrl = &Control;
- mmResult = mixerGetLineControls( (HMIXEROBJ)m_dwMixerHandle, &LineControls, MIXER_GETLINECONTROLSF_ONEBYTYPE );
- if ( mmResult == MMSYSERR_NOERROR )
- {
- if ( !(Control.fdwControl & MIXERCONTROL_CONTROLF_DISABLED) )
- {
- m_bAvailable = true;
- TRACE(".WaveOutputVolume: "%s" Volume control for the WaveOut Source Line adopted.n", Control.szShortName );
- } else {
- TRACE(".WaveOutputVolume: WARNING: The Volume Control is disabled.n" );
- }
- } else {
- TRACE(".WaveOutputVolume: WARNING: Could not get the WaveOut Source line Volume Control while initilaizing. mmResult=%dn", mmResult );
- }
-
- m_nChannelCount = MixerLine.cChannels;
- m_dwLineID = LineControls.dwLineID;
- m_dwVolumeControlID = Control.dwControlID;
- m_dwMinimalVolume = Control.Bounds.dwMinimum;
- m_dwMaximalVolume = Control.Bounds.dwMaximum;
- m_dwVolumeStep = Control.Metrics.cSteps;
- m_bInitialized = true;
- return true;
- }
- //////////////
- void CVolumeOutWave::EnableLine( bool bEnable )
- {
- if ( !m_bInitialized )
- return;
- bool bAnyEnabled = false;
- MMRESULT mmResult;
- MIXERLINE lineDestination;
- memset( &lineDestination, 0, sizeof(MIXERLINE) );
- lineDestination.cbStruct = sizeof(MIXERLINE);
- lineDestination.dwLineID = m_dwLineID;
- mmResult = mixerGetLineInfo( (HMIXEROBJ)m_dwMixerHandle, &lineDestination, MIXER_GETLINEINFOF_LINEID );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- if ( bEnable )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not get the WaveOut Destination Line while enabling. mmResult=%dn", mmResult );
- } else {
- TRACE(".WaveOutputVolume: FAILURE: Could not get the WaveOut Destination Line while disabling. mmResult=%dn", mmResult );
- }
- return;
- }
- // Getting all line's controls
- int nControlCount = lineDestination.cControls;
- int nChannelCount = lineDestination.cChannels;
- MIXERLINECONTROLS LineControls;
- memset( &LineControls, 0, sizeof(MIXERLINECONTROLS) );
- MIXERCONTROL* aControls = (MIXERCONTROL*)malloc( nControlCount * sizeof(MIXERCONTROL) );
- if ( !aControls )
- {
- if ( bEnable )
- {
- TRACE(".WaveOutputVolume: FAILURE: Out of memory while enabling the line.n" );
- } else {
- TRACE(".WaveOutputVolume: FAILURE: Out of memory while disabling the line.n" );
- }
- return;
- }
- memset( &aControls[0], 0, sizeof(nControlCount * sizeof(MIXERCONTROL)) );
- for ( int i = 0; i < nControlCount; i++ )
- {
- aControls[i].cbStruct = sizeof(MIXERCONTROL);
- }
- LineControls.cbStruct = sizeof(MIXERLINECONTROLS);
- LineControls.dwLineID = lineDestination.dwLineID;
- LineControls.cControls = nControlCount;
- LineControls.cbmxctrl = sizeof(MIXERCONTROL);
- LineControls.pamxctrl = &aControls[0];
- mmResult = mixerGetLineControls( (HMIXEROBJ)m_dwMixerHandle, &LineControls, MIXER_GETLINECONTROLSF_ALL );
- if ( mmResult == MMSYSERR_NOERROR )
- {
- for ( i = 0; i < nControlCount; i++ )
- {
- LONG lValue;
- bool bReadyToSet = false;
- switch (aControls[i].dwControlType)
- {
- case MIXERCONTROL_CONTROLTYPE_MUTE:
- lValue = (BOOL)!bEnable;
- bReadyToSet = true;
- break;
- case MIXERCONTROL_CONTROLTYPE_SINGLESELECT:
- lValue = (BOOL)bEnable;
- bReadyToSet = true;
- break;
- case MIXERCONTROL_CONTROLTYPE_MUX:
- lValue = (BOOL)bEnable;
- bReadyToSet = true;
- break;
- case MIXERCONTROL_CONTROLTYPE_MULTIPLESELECT:
- lValue = (BOOL)bEnable;
- bReadyToSet = true;
- break;
- case MIXERCONTROL_CONTROLTYPE_MIXER:
- lValue = (BOOL)bEnable;
- bReadyToSet = true;
- break;
- }
- if ( bReadyToSet )
- {
- MIXERCONTROLDETAILS_BOOLEAN* aDetails = NULL;
- int nMultipleItems = aControls[i].cMultipleItems;
- int nChannels = nChannelCount;
- // MIXERCONTROLDETAILS
- MIXERCONTROLDETAILS ControlDetails;
- memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
- ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
- ControlDetails.dwControlID = aControls[i].dwControlID;
- if ( aControls[i].fdwControl & MIXERCONTROL_CONTROLF_UNIFORM )
- {
- nChannels = 1;
- }
- if ( aControls[i].fdwControl & MIXERCONTROL_CONTROLF_MULTIPLE )
- {
- nMultipleItems = aControls[i].cMultipleItems;
- aDetails = (MIXERCONTROLDETAILS_BOOLEAN*)malloc(nMultipleItems*nChannels*sizeof(MIXERCONTROLDETAILS_BOOLEAN));
- if ( !aDetails )
- {
- TRACE(".WaveOutputVolume: FAILURE: Out of memory while enabling the line.n" );
- continue;
- }
- for ( int nItem = 0; nItem < nMultipleItems; nItem++ )
- {
- for ( int nChannel = 0; nChannel < nChannels; nChannel++ )
- {
- aDetails[nItem+nChannel].fValue = lValue;
- }
- }
- } else {
- nMultipleItems = 0;
- aDetails = (MIXERCONTROLDETAILS_BOOLEAN*)malloc(nChannels*sizeof(MIXERCONTROLDETAILS_BOOLEAN));
- if ( !aDetails )
- {
- if ( bEnable )
- {
- TRACE(".WaveOutputVolume: FAILURE: Out of memory while enabling the line.n" );
- } else {
- TRACE(".WaveOutputVolume: FAILURE: Out of memory while disabling the line.n" );
- }
- continue;
- }
- for ( int nChannel = 0; nChannel < nChannels; nChannel++ )
- {
- aDetails[nChannel].fValue = (LONG)lValue;
- }
- }
- ControlDetails.cChannels = nChannels;
- ControlDetails.cMultipleItems = nMultipleItems;
- ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
- ControlDetails.paDetails = &aDetails[0];
- mmResult = mixerSetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, 0L );
- if ( mmResult == MMSYSERR_NOERROR )
- {
- if ( bEnable )
- {
- TRACE(".WaveOutputVolume: Enabling Line: WaveOut Line control "%s"(0x%X) has been set to %d.n", aControls[i].szShortName, aControls[i].dwControlType, lValue );
- } else {
- TRACE(".WaveOutputVolume: Disabling Line: WaveOut Line control "%s"(0x%X) has been set to %d.n", aControls[i].szShortName, aControls[i].dwControlType, lValue );
- }
- bAnyEnabled = true;
- }
- free( aDetails );
- }
- }
- } else {
- if ( bEnable )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not get the line controls while enabling. mmResult=%dn", mmResult );
- } else {
- TRACE(".WaveOutputVolume: FAILURE: Could not get the line controls while disabling. mmResult=%dn", mmResult );
- }
- }
- free( aControls );
- if ( !bAnyEnabled )
- {
- if ( bEnable )
- {
- TRACE(".WaveOutputVolume: WARNING: No controls were found for enabling the line.n" );
- } else {
- TRACE(".WaveOutputVolume: WARNING: No controls were found for disabling the line.n" );
- }
- }
- }
- //////////////////////////////////////////////
- // IVolume interface
- //////////////
- bool CVolumeOutWave::IsAvailable()
- {
- return m_bAvailable;
- }
- //////////////
- void CVolumeOutWave::Enable()
- {
- EnableLine( true );
- }
- //////////////
- void CVolumeOutWave::Disable()
- {
- EnableLine( false );
- }
- //////////////
- DWORD CVolumeOutWave::GetVolumeMetric()
- {
- if ( !m_bAvailable )
- return BAD_DWORD;
- return m_dwVolumeStep;
- }
- //////////////
- DWORD CVolumeOutWave::GetMinimalVolume()
- {
- if ( !m_bAvailable )
- return BAD_DWORD;
- return m_dwMinimalVolume;
- }
- //////////////
- DWORD CVolumeOutWave::GetMaximalVolume()
- {
- if ( !m_bAvailable )
- return BAD_DWORD;
- return m_dwMaximalVolume;
- }
- //////////////
- DWORD CVolumeOutWave::GetCurrentVolume()
- {
- if ( !m_bAvailable )
- return BAD_DWORD;
- MIXERCONTROLDETAILS_UNSIGNED* aDetails = (MIXERCONTROLDETAILS_UNSIGNED*)malloc(m_nChannelCount*sizeof(MIXERCONTROLDETAILS_UNSIGNED));
- if ( !aDetails )
- return BAD_DWORD;
- MIXERCONTROLDETAILS ControlDetails;
- memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
- ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
- ControlDetails.dwControlID = m_dwVolumeControlID;
- ControlDetails.cChannels = m_nChannelCount;
- ControlDetails.cMultipleItems = 0;
- ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
- ControlDetails.paDetails = &aDetails[0];
- MMRESULT mmResult = mixerGetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, MIXER_GETCONTROLDETAILSF_VALUE );
- DWORD dw = aDetails[0].dwValue;
- free( aDetails );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not get volume. mmResult=%dn", mmResult );
- return BAD_DWORD;
- }
- return dw;
- }
- //////////////
- void CVolumeOutWave::SetCurrentVolume( DWORD dwValue )
- {
- if ( !m_bAvailable || (dwValue<m_dwMinimalVolume) || (dwValue>m_dwMaximalVolume) )
- return;
- MIXERCONTROLDETAILS_UNSIGNED* aDetails = (MIXERCONTROLDETAILS_UNSIGNED*)malloc(m_nChannelCount*sizeof(MIXERCONTROLDETAILS_UNSIGNED));
- if ( !aDetails )
- return;
- for ( int i = 0; i < m_nChannelCount; i++ )
- {
- aDetails[i].dwValue = dwValue;
- }
- MIXERCONTROLDETAILS ControlDetails;
- memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
- ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
- ControlDetails.dwControlID = m_dwVolumeControlID;
- ControlDetails.cChannels = m_nChannelCount;
- ControlDetails.cMultipleItems = 0;
- ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
- ControlDetails.paDetails = &aDetails[0];
- MMRESULT mmResult = mixerSetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, MIXER_SETCONTROLDETAILSF_VALUE );
- free( aDetails );
- if ( mmResult != MMSYSERR_NOERROR )
- {
- TRACE(".WaveOutputVolume: FAILURE: Could not set volume(%d) mmResult=%dn", dwValue, mmResult );
- }
- }
- //////////////
- void CVolumeOutWave::RegisterNotificationSink( PONMICVOULUMECHANGE pfUserSink, DWORD dwUserValue )
- {
- m_pfUserSink = pfUserSink;
- m_dwUserValue = dwUserValue;
- }
- ////////////////////////////////////////////////////////////////////////
- LRESULT CALLBACK CVolumeOutWave::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);
- }