181 lines
4.7 KiB
C++
181 lines
4.7 KiB
C++
/*==========================================================================
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*
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* Copyright (C) 1995-1999 Microsoft Corporation. All Rights Reserved.
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*
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* File: misc.cpp
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* Content: Misc Support Routines
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* History:
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*
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* Date By Reason
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* ==== == ======
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* 10/15/99 rodtoll created it
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*
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***************************************************************************/
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#include "dxvhelppch.h"
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#undef DPF_SUBCOMP
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#define DPF_SUBCOMP DN_SUBCOMP_VOICE
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// MicrophoneGetVolume
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//
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// This function retrieves the current volume of the microphone
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// recording line.
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//
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// Parameters:
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// UINT waveInDevice -
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// This specifies the device for which we wish to get
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// the microphone recording volume. This is the
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// waveIN device ID for the desired device.
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//
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// BYTE &volume -
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// [output] The current volume of the microphone recording
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// line for the specified device. (DSound Range)
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//
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// BOOL -
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// true on success, false on failure
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//
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#undef DPF_MODNAME
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#define DPF_MODNAME "MicrophoneGetVolume"
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BOOL MicrophoneGetVolume( UINT waveInDevice, LONG &volume ) {
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MMRESULT result;
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// Open the mixer device
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HMIXER hmx = NULL;
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LPMIXERCONTROLDETAILS_UNSIGNED pUnsigned = NULL;
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LPMIXERCONTROL pmxctrl = NULL;
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bool foundMicrophone = false;
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DWORD i;
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if( mixerOpen(&hmx, waveInDevice, 0, 0, MIXER_OBJECTF_WAVEIN) != MMSYSERR_NOERROR )
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return FALSE;
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// Get the line info for the wave in destination line
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MIXERLINE mxl;
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mxl.cbStruct = sizeof(mxl);
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mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
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mixerGetLineInfo((HMIXEROBJ)hmx, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE);
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// Now find the microphone source line connected to this wave in
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// destination
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DWORD cConnections = mxl.cConnections;
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for(i=0; i<cConnections; i++)
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{
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mxl.dwSource = i;
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mixerGetLineInfo((HMIXEROBJ)hmx, &mxl, MIXER_GETLINEINFOF_SOURCE);
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if (MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE == mxl.dwComponentType)
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{
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foundMicrophone = true;
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break;
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}
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}
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if( !foundMicrophone )
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{
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for(i=0; i<cConnections; i++)
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{
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mxl.dwSource = i;
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if( mixerGetLineInfo((HMIXEROBJ)hmx, &mxl, MIXER_GETLINEINFOF_SOURCE) != MMSYSERR_NOERROR )
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{
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return false;
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}
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if (MIXERLINE_COMPONENTTYPE_SRC_LINE == mxl.dwComponentType)
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{
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foundMicrophone = true;
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break;
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}
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}
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if( !foundMicrophone )
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{
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for(i=0; i<cConnections; i++)
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{
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mxl.dwSource = i;
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if( mixerGetLineInfo((HMIXEROBJ)hmx, &mxl, MIXER_GETLINEINFOF_SOURCE) != MMSYSERR_NOERROR )
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{
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return false;
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}
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if (MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY == mxl.dwComponentType)
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{
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foundMicrophone = true;
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break;
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}
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}
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}
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}
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if( !foundMicrophone )
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{
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DPFX(DPFPREP, DVF_INFOLEVEL, "ERROR: Unable to find microphone source" );
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return FALSE;
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}
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// Find a volume control, if any, of the microphone line
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pmxctrl = new MIXERCONTROL;
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if( pmxctrl == NULL )
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{
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DPFX(DPFPREP, DVF_ERRORLEVEL, "Unable to alloc mixercontrol" );
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return FALSE;
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}
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MIXERLINECONTROLS mxlctrl = {
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sizeof(mxlctrl), mxl.dwLineID, MIXERCONTROL_CONTROLTYPE_VOLUME,
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1, sizeof(MIXERCONTROL), pmxctrl
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};
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if( (result = mixerGetLineControls((HMIXEROBJ) hmx, &mxlctrl, MIXER_GETLINECONTROLSF_ONEBYTYPE)) == MMSYSERR_NOERROR )
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{
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// Found!
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DWORD cChannels = mxl.cChannels;
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if (MIXERCONTROL_CONTROLF_UNIFORM & pmxctrl->fdwControl)
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cChannels = 1;
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pUnsigned = new MIXERCONTROLDETAILS_UNSIGNED[cChannels];
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if( pUnsigned == NULL )
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{
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DPFX(DPFPREP, DVF_ERRORLEVEL, "Unable to alloc unsigneds" );
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delete pmxctrl;
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return FALSE;
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}
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MIXERCONTROLDETAILS mxcd = {
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sizeof(mxcd), pmxctrl->dwControlID,
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cChannels, (HWND)0, sizeof(MIXERCONTROLDETAILS_UNSIGNED),
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(LPVOID) pUnsigned
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};
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if( mixerGetControlDetails((HMIXEROBJ)hmx, &mxcd, MIXER_GETCONTROLDETAILSF_VALUE) != MMSYSERR_NOERROR )
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return false;
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volume = ((pUnsigned[0].dwValue) * (DSBVOLUME_MAX-DSBVOLUME_MIN)) / 0xFFFF;
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volume += DSBVOLUME_MIN;
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if( mixerSetControlDetails((HMIXEROBJ)hmx, &mxcd, MIXER_SETCONTROLDETAILSF_VALUE) != MMSYSERR_NOERROR )
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return FALSE;
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if( mixerClose(hmx) != MMSYSERR_NOERROR )
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return FALSE;
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delete pmxctrl;
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delete [] pUnsigned;
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return TRUE;
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}
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else
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{
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return FALSE;
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}
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}
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