使用多媒体API枚举音频设备 - zgl7903的专栏

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//=============================================================================
//=============================================================================
// MixerInfo.cpp
//
// Utility function to list all available options of your mixer device interface
//
//=============================================================================
//===========================================================================
// Function : GetDevicesInfo
//
// Utility function that will print to the specified file all audio lines
// and all mixer controls available on your system. You might want to use
// this function before doing anything else to determine the capabilities
// of your sound card, and of the mixer drivers installed.
//
// It will list all destination lines (ouput lines) and all
// source (input) lines available with every destination line. It will
// also list the available mixer controls for each audio line. Use that
// information to determine what type of windows controls you would
// be allowed to create.
//
// Check the output file and note the type and number of destination (output)
// lines, as well as the source (input) lines associated with every destination
// line. These are labled "Line type".
// Note also the available control types, labeled "Control types"
// You will need these to create your windows controls.
//
// The output may be quite long, but its structure is as follows: for
// every destination line, the controls that work on the output are listed first.
// Then the source lines available for the given output line are listed, as well
// as the controls they contain. Below is an example for the speakers output
// line only, where all the extra information has been removed.
//
//**************************************************************************************
//** Destination line. Index = 0 *******************************************************
// ------
// Line type : --------- MIXERLINE_COMPONENTTYPE_DST_SPEAKERS
// ------
//
// Control type: MIXERCONTROL_CONTROLTYPE_VOLUME
//
// Control type: MIXERCONTROL_CONTROLTYPE_MUTE
//
// Control type: MIXERCONTROL_CONTROLTYPE_MIXER
//
// Control type: MIXERCONTROL_CONTROLTYPE_BASS
//
// Control type: MIXERCONTROL_CONTROLTYPE_TREBLE
//
// Control type: ---- UNKNOWN CONTROL TYPE ----
//
// =====================================================================================
// == Source line. Index = 0 ===========================================================
// ------
// Line type : --------- MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY
// ------
// Audio line is a source originating from the auxiliary audio line.
//
// Control type: MIXERCONTROL_CONTROLTYPE_VOLUME
//
// Control type: MIXERCONTROL_CONTROLTYPE_MUTE
//
// ======================================================================================
// == Source line. Index = 1 ===========================================================
// ------
// Line type : --------- MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER
// ------
// Audio line is a source originating from the output of an internal synthesizer.
//
// Control type: MIXERCONTROL_CONTROLTYPE_VOLUME
//
// Control type: MIXERCONTROL_CONTROLTYPE_MUTE
//
// ======================================================================================
// == Source line. Index = 2 ===========================================================
// ------
// Line type : --------- MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE
// ------
// Audio line is a microphone recording source.
//
// Control type: MIXERCONTROL_CONTROLTYPE_VOLUME
//
// Control type: MIXERCONTROL_CONTROLTYPE_MUTE
//
// Control type: MIXERCONTROL_CONTROLTYPE_ONOFF
//
// ======================================================================================
// == Source line. Index = 3 ===========================================================
// ------
// Line type : --------- MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC
// ------
// Audio line is a source originating from the output of an internal audio CD.
//
// Control type: MIXERCONTROL_CONTROLTYPE_VOLUME
//
// Control type: MIXERCONTROL_CONTROLTYPE_MUTE
//
// ======================================================================================
// == Source line. Index = 4 ===========================================================
// ------
// Line type : --------- MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT
// ------
// Audio line is a source originating from the waveform-audio output digital-to-analog converter (DAC).
//
// Control type: MIXERCONTROL_CONTROLTYPE_VOLUME
//
// Control type: MIXERCONTROL_CONTROLTYPE_MUTE
//
// Control type: MIXERCONTROL_CONTROLTYPE_PEAKMETER
//
//
// Implemented in MixerInfo.cpp
//
// Return : void
// Arg : LPCSTR filename : name of output file
//===========================================================================
#include "stdafx.h"
#include
#pragma comment(lib, "winmm.lib")
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
//mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
// Name : PrintLineType
//
// Descr. :
//
// Return : void
// Arg : int nIndent :
// Arg : MIXERLINE &line :
// Arg : FILE *file :
//-----------------------------------------------------------------------------
void PrintLineType( int nIndent, MIXERLINE &line, FILE *file )
{
char *tabs;
if( nIndent == 0 )
tabs = "";
else
tabs = "/t";
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Line type :", tabs );
switch( line.dwComponentType )
{
case MIXERLINE_COMPONENTTYPE_DST_DIGITAL:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_DIGITAL/n", tabs );
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a digital destination (for example, digital input to a DAT or CD audio device)./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_UNDEFINED:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_UNDEFINED/n", tabs );
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a destination that cannot be defined by one of the standard component types./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_LINE:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_LINE/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a line level destination that will be the final recording source for the analog-to-digital converter (ADC)./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_MONITOR:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_MONITOR/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a destination used for a monitor./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_SPEAKERS:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_SPEAKERS/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is an adjustable (gain and/or attenuation) destination intended to drive speakers./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_HEADPHONES:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_HEADPHONES/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is an adjustable (gain and/or attenuation) destination intended to drive headphones./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_TELEPHONE:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_TELEPHONE/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a destination that will be routed to a telephone line./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_WAVEIN:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_WAVEIN/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a destination that will be the final recording source for the waveform-audio input (ADC)./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_DST_VOICEIN:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_DST_VOICEIN/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a destination that will be the final recording source for voice input./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_ANALOG:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_ANALOG/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is an analog source (for example, analog output from a video-cassette tape)./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source originating from the auxiliary audio line./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source originating from the output of an internal audio CD./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_DIGITAL:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_DIGITAL/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a digital source (for example, digital output from a DAT or audio CD)./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_LINE:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_LINE/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a line-level source (for example, line-level input from an external stereo)./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a microphone recording source./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source originating from personal computer speaker./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source originating from the output of an internal synthesizer./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source originating from an incoming telephone line./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source that cannot be defined by one of the standard component types./n", tabs );
break;
case MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT:
fprintf( file, "%s MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT/n", tabs);
fprintf( file, "%s -----------------------------------------------------------------------/n", tabs );
fprintf( file, "%s Audio line is a source originating from the waveform-audio output digital-to-analog converter (DAC)./n", tabs );
break;
default:
fprintf( file, "/n" );
break;
}
fprintf( file, "%s Name: %s/n", tabs, line.szName );
fprintf( file, "%s Short Name: %s/n/n", tabs, line.szShortName );
switch( line.fdwLine )
{
case MIXERLINE_LINEF_ACTIVE:
fprintf( file, "%s Audio line is active. signal is probably passing through the line./n", tabs );
break;
case MIXERLINE_LINEF_DISCONNECTED:
fprintf( file, "%s Audio line is disconnected./n", tabs );
break;
case MIXERLINE_LINEF_SOURCE:
fprintf( file, "%s Audio line is an audio source line associated with a single audio destination line./n", tabs );
break;
default:
break;
}
if( line.Target.dwType != MIXERLINE_TARGETTYPE_UNDEFINED )
{
fprintf( file, "%s Target type: %lu -- ", tabs, line.Target.dwType );
switch( line.Target.dwType )
{
case MIXERLINE_TARGETTYPE_WAVEOUT:
fprintf( file, "MIXERLINE_TARGETTYPE_WAVEOUT/n" );
break;
case MIXERLINE_TARGETTYPE_WAVEIN:
fprintf( file, "MIXERLINE_TARGETTYPE_WAVEIN/n" );
break;
case MIXERLINE_TARGETTYPE_MIDIOUT:
fprintf( file, "MIXERLINE_TARGETTYPE_MIDIOUT/n" );
break;
case MIXERLINE_TARGETTYPE_MIDIIN:
fprintf( file, "MIXERLINE_TARGETTYPE_MIDIIN/n" );
break;
case MIXERLINE_TARGETTYPE_AUX:
fprintf( file, "MIXERLINE_TARGETTYPE_AUX/n" );
break;
default:
fprintf( file, "/n" );
break;
}
fprintf( file, "%s Target name: %s/n", tabs, line.Target.szPname );
fprintf( file, "%s Manufacturer and product IDs: %u -- %u (see mmreg.h or help subject: /"Manufacturer and Product Identifiers/")/n/n", tabs, line.Target.wMid , line.Target.wPid );
}
if( line.dwComponentType > MIXERLINE_COMPONENTTYPE_DST_FIRST && line.dwComponentType <= MIXERLINE_COMPONENTTYPE_DST_LAST )
{
fprintf( file, "%s Number of source lines associated with destination line: %lu/n", tabs, line.cConnections );
}
fprintf( file, "%s Number of channels: %lu/n", tabs, line.cChannels );
fprintf( file, "%s Number of controls: %lu/n", tabs, line.cControls );
if( line.cControls > 0 )
fprintf( file, "%s List of controls follows:/n", tabs );
}
//mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
LPCTSTR GetControlTypeString( DWORD type )
//mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
{
switch( type )
{
case MIXERCONTROL_CONTROLTYPE_CUSTOM:
return ( "MIXERCONTROL_CONTROLTYPE_CUSTOM" );
case MIXERCONTROL_CONTROLTYPE_BOOLEANMETER:
return ( "MIXERCONTROL_CONTROLTYPE_BOOLEANMETER" );
case MIXERCONTROL_CONTROLTYPE_SIGNEDMETER:
return ( "MIXERCONTROL_CONTROLTYPE_SIGNEDMETER" );
case MIXERCONTROL_CONTROLTYPE_UNSIGNEDMETER:
return ( "MIXERCONTROL_CONTROLTYPE_UNSIGNEDMETER" );
case MIXERCONTROL_CONTROLTYPE_PEAKMETER:
return ( "MIXERCONTROL_CONTROLTYPE_PEAKMETER" );
case MIXERCONTROL_CONTROLTYPE_BOOLEAN:
return ( "MIXERCONTROL_CONTROLTYPE_BOOLEAN" );
case MIXERCONTROL_CONTROLTYPE_ONOFF:
return ( "MIXERCONTROL_CONTROLTYPE_ONOFF" );
case MIXERCONTROL_CONTROLTYPE_MUTE:
return ( "MIXERCONTROL_CONTROLTYPE_MUTE" );
case MIXERCONTROL_CONTROLTYPE_MONO:
return ( "MIXERCONTROL_CONTROLTYPE_MONO" );
case MIXERCONTROL_CONTROLTYPE_LOUDNESS:
return ( "MIXERCONTROL_CONTROLTYPE_LOUDNESS" );
case MIXERCONTROL_CONTROLTYPE_STEREOENH:
return ( "MIXERCONTROL_CONTROLTYPE_STEREOENH" );
case MIXERCONTROL_CONTROLTYPE_BUTTON:
return ( "MIXERCONTROL_CONTROLTYPE_BUTTON" );
case MIXERCONTROL_CONTROLTYPE_DECIBELS:
return ( "MIXERCONTROL_CONTROLTYPE_DECIBELS" );
case MIXERCONTROL_CONTROLTYPE_SIGNED:
return ( "MIXERCONTROL_CONTROLTYPE_SIGNED" );
case MIXERCONTROL_CONTROLTYPE_UNSIGNED:
return ( "MIXERCONTROL_CONTROLTYPE_UNSIGNED" );
case MIXERCONTROL_CONTROLTYPE_PERCENT:
return ( "MIXERCONTROL_CONTROLTYPE_PERCENT" );
case MIXERCONTROL_CONTROLTYPE_SLIDER:
return ( "MIXERCONTROL_CONTROLTYPE_SLIDER" );
case MIXERCONTROL_CONTROLTYPE_PAN:
return ( "MIXERCONTROL_CONTROLTYPE_PAN" );
case MIXERCONTROL_CONTROLTYPE_QSOUNDPAN:
return ( "MIXERCONTROL_CONTROLTYPE_QSOUNDPAN" );
case MIXERCONTROL_CONTROLTYPE_FADER:
return ( "MIXERCONTROL_CONTROLTYPE_FADER" );
case MIXERCONTROL_CONTROLTYPE_VOLUME:
return ( "MIXERCONTROL_CONTROLTYPE_VOLUME" );
case MIXERCONTROL_CONTROLTYPE_BASS:
return ( "MIXERCONTROL_CONTROLTYPE_BASS" );
case MIXERCONTROL_CONTROLTYPE_TREBLE:
return ( "MIXERCONTROL_CONTROLTYPE_TREBLE" );
case MIXERCONTROL_CONTROLTYPE_EQUALIZER:
return ( "MIXERCONTROL_CONTROLTYPE_EQUALIZER" );
case MIXERCONTROL_CONTROLTYPE_SINGLESELECT:
return ( "MIXERCONTROL_CONTROLTYPE_SINGLESELECT" );
case MIXERCONTROL_CONTROLTYPE_MUX:
return ( "MIXERCONTROL_CONTROLTYPE_MUX" );
case MIXERCONTROL_CONTROLTYPE_MULTIPLESELECT:
return ( "MIXERCONTROL_CONTROLTYPE_MULTIPLESELECT" );
case MIXERCONTROL_CONTROLTYPE_MIXER:
return ( "MIXERCONTROL_CONTROLTYPE_MIXER" );
case MIXERCONTROL_CONTROLTYPE_MICROTIME:
return ( "MIXERCONTROL_CONTROLTYPE_MICROTIME" );
case MIXERCONTROL_CONTROLTYPE_MILLITIME:
return ( "MIXERCONTROL_CONTROLTYPE_MILLITIME" );
default:
return ( "---- UNKNOWN CONTROL TYPE ----" );
}
}
LPCTSTR GetLineTypeString( DWORD type )
{
switch( type )
{
case MIXERLINE_COMPONENTTYPE_DST_DIGITAL:
return ( "MIXERLINE_COMPONENTTYPE_DST_DIGITAL" );
case MIXERLINE_COMPONENTTYPE_DST_UNDEFINED:
return ( "MIXERLINE_COMPONENTTYPE_DST_UNDEFINED" );
case MIXERLINE_COMPONENTTYPE_DST_LINE:
return ( "MIXERLINE_COMPONENTTYPE_DST_LINE");
case MIXERLINE_COMPONENTTYPE_DST_MONITOR:
return ( "MIXERLINE_COMPONENTTYPE_DST_MONITOR");
case MIXERLINE_COMPONENTTYPE_DST_SPEAKERS:
return ( "MIXERLINE_COMPONENTTYPE_DST_SPEAKERS");
case MIXERLINE_COMPONENTTYPE_DST_HEADPHONES:
return ( "MIXERLINE_COMPONENTTYPE_DST_HEADPHONES");
case MIXERLINE_COMPONENTTYPE_DST_TELEPHONE:
return ( "MIXERLINE_COMPONENTTYPE_DST_TELEPHONE");
case MIXERLINE_COMPONENTTYPE_DST_WAVEIN:
return ( "MIXERLINE_COMPONENTTYPE_DST_WAVEIN");
case MIXERLINE_COMPONENTTYPE_DST_VOICEIN:
return ( "MIXERLINE_COMPONENTTYPE_DST_VOICEIN");
case MIXERLINE_COMPONENTTYPE_SRC_ANALOG:
return ( "MIXERLINE_COMPONENTTYPE_SRC_ANALOG");
case MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY:
return ( "MIXERLINE_COMPONENTTYPE_SRC_AUXILIARY");
case MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC:
return ( "MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC");
case MIXERLINE_COMPONENTTYPE_SRC_DIGITAL:
return ( "MIXERLINE_COMPONENTTYPE_SRC_DIGITAL");
case MIXERLINE_COMPONENTTYPE_SRC_LINE:
return ( "MIXERLINE_COMPONENTTYPE_SRC_LINE");
case MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE:
return ( "MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE");
case MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER:
return ( "MIXERLINE_COMPONENTTYPE_SRC_PCSPEAKER");
case MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER:
return ( "MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER");
case MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE:
return ( "MIXERLINE_COMPONENTTYPE_SRC_TELEPHONE");
case MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED:
return ( "MIXERLINE_COMPONENTTYPE_SRC_UNDEFINED");
case MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT:
return ( "MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT");
default:
return ( "---- UNKNOWN LINE TYPE ----" );
}
}
//mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
// Name : PrintControl
//
// Descr. :
//
// Return : void
// Arg : HMIXEROBJ mixer :
// Arg : MIXERLINE &line :
// Arg : MIXERCONTROL &control :
// Arg : FILE *file :
//-----------------------------------------------------------------------------
void PrintControl( HMIXEROBJ mixer, MIXERLINE &line, MIXERCONTROL &control, FILE *file )
{
char *tabs = "/t/t";
fprintf( file, "/n%s ---------------------------- Control ----------------------------/n", tabs );
fprintf( file, "%s Control type:/t%s/n", tabs, GetControlTypeString(control.dwControlType) );
fprintf( file, "%s -----------------------------------------------------------------/n", tabs );
fprintf( file, "%s Short Name: %s/n", tabs, control.szShortName );
fprintf( file, "%s Name: %s/n", tabs, control.szName );
switch( control.dwControlType & MIXERCONTROL_CT_UNITS_MASK )
{
case MIXERCONTROL_CT_UNITS_UNSIGNED:
case MIXERCONTROL_CT_UNITS_DECIBELS:
fprintf( file, "%s - Min: %lu/n", tabs, control.Bounds.dwMinimum );
fprintf( file, "%s - Max: %lu/n", tabs, control.Bounds.dwMaximum );
break;
case MIXERCONTROL_CT_UNITS_PERCENT:
case MIXERCONTROL_CT_UNITS_SIGNED:
case MIXERCONTROL_CT_UNITS_BOOLEAN:
fprintf( file, "%s - Min: %ld/n", tabs, control.Bounds.lMinimum );
fprintf( file, "%s - Max: %ld/n", tabs, control.Bounds.lMaximum );
break;
case MIXERCONTROL_CT_UNITS_CUSTOM:
fprintf( file, "%s Custom control/n", tabs );
break;
default:
break;
}
fprintf( file, "%s - Steps: %lu/n", tabs, control.Metrics.cSteps );
fprintf( file, "%s Status and support flags:/n", tabs);
if( control.fdwControl & MIXERCONTROL_CONTROLF_UNIFORM )
fprintf( file, "%s - Uniform control/n", tabs );
if( control.fdwControl & MIXERCONTROL_CONTROLF_DISABLED )
fprintf( file, "%s - Control is disabled/n", tabs );
if( control.fdwControl & MIXERCONTROL_CONTROLF_MULTIPLE )
fprintf( file, "%s - Multiple control. The control has two or more possible settings./n", tabs );
fprintf( file, "%s Number of items per channel: %d/n", tabs, control.cMultipleItems );
if( control.cMultipleItems > 0 )
{
MIXERCONTROLDETAILS details;
details.cbStruct = sizeof( MIXERCONTROLDETAILS );
details.dwControlID = control.dwControlID;
details.cMultipleItems = control.cMultipleItems;
details.cbDetails = sizeof( MIXERCONTROLDETAILS_LISTTEXT );
int listSize;
if( control.fdwControl & MIXERCONTROL_CONTROLF_UNIFORM )
{
details.cChannels = 1;
listSize = control.cMultipleItems;
}
else
{
details.cChannels = line.cChannels;
listSize = control.cMultipleItems*line.cChannels;
}
MIXERCONTROLDETAILS_LISTTEXT *list = new MIXERCONTROLDETAILS_LISTTEXT[listSize];
details.paDetails = list;
if( mixerGetControlDetails( mixer, &details,
MIXER_GETCONTROLDETAILSF_LISTTEXT ) != MMSYSERR_NOERROR )
{
TRACE( "mixerGetControlDetails failed/n" );
delete[] list;
return;
}
for ( int i = 0; i < listSize; i++ )
{
fprintf( file, "%s -------------- Item %d -------------/n", tabs, i );
fprintf( file, "%s Name: %s/n", tabs, list[i].szName );
}
delete[] list;
}
}
//mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
// Name : GetDevicesInfo
//
// Descr. : Finds all the input and output lines, and all mixer controls
// available through the audio mixer device.
//
// Use GetDevicesInfo() to find out the capabilities of your sound card.
// Check the the file and note the type and number of destination (output)
// lines, as well as the source (input) lines associated with every
// destination line. Note also the type of the controls available.
// You will need these to create your windows controls.
//
// Return : void
// Arg : LPCSTR filename :
//-----------------------------------------------------------------------------
void GetDevicesInfo( LPCSTR filename )
{
FILE *file;
UINT nbMixers = mixerGetNumDevs();
if( nbMixers < 1 )
{
AfxMessageBox( "No mixer device present" );
return;
}
file = fopen( filename, "w" );
if( file == NULL )
{
AfxMessageBox("Could not open file.");
return;
}
HMIXER hMixer;
if( mixerOpen( &hMixer, 0, 0, 0, 0 ) != MMSYSERR_NOERROR )
{
AfxMessageBox( "Could not open mixer device" );
return;
}
MIXERCAPS caps;
if( mixerGetDevCaps( ( UINT )hMixer, &caps, sizeof( MIXERCAPS ) ) != MMSYSERR_NOERROR )
{
fclose( file );
mixerClose(hMixer);
return;
}
fprintf( file, "Name of device: %s/n", caps.szPname );
fprintf( file, "Number of destination lines: %d/n/n", caps.cDestinations );
fprintf( file, "/nPay particular attention to the /"Line type/" and /"Control type/" lines./n"
"You will pass these to the Init() functions of the various CMixerBase-derived classes/n"
"to specify which type of control you want to use./n");
MIXERLINE line;
MIXERLINECONTROLS mixerLineControl;
MIXERCONTROL *pMixerControl;
int nDest = caps.cDestinations;
for( int i = 0; i < nDest; i++ )
{
line.cbStruct = sizeof( MIXERLINE );
line.dwSource = 0;
line.dwDestination = i;
mixerGetLineInfo( ( HMIXEROBJ )hMixer, &line, MIXER_GETLINEINFOF_DESTINATION );
fprintf( file, "/n***************************************************************************************************/n");
fprintf( file, "** Destination line. Index = %d *******************************************************************/n", i );
fprintf( file, "***************************************************************************************************/n");
PrintLineType( 0, line, file );
pMixerControl = new MIXERCONTROL[line.cControls];
ASSERT( pMixerControl != NULL );
mixerLineControl.cbStruct = sizeof( MIXERLINECONTROLS );
mixerLineControl.dwLineID = line.dwLineID;
mixerLineControl.cControls = line.cControls;
mixerLineControl.cbmxctrl = sizeof( MIXERCONTROL );
mixerLineControl.pamxctrl = pMixerControl;
mixerGetLineControls( ( HMIXEROBJ )hMixer, &mixerLineControl, MIXER_GETLINECONTROLSF_ALL );
UINT ncontrols = line.cControls;
for( UINT k = 0; k < ncontrols; k++ )
{
PrintControl( ( HMIXEROBJ )hMixer, line, pMixerControl[k], file );
}
delete[] pMixerControl;
// for each destination line, list the source lines and their controls
UINT nconn = line.cConnections;
for( UINT j = 0; j < nconn; j++ )
{
line.cbStruct = sizeof( MIXERLINE );
line.dwSource = j;
line.dwDestination = i;
mixerGetLineInfo( ( HMIXEROBJ )hMixer, &line, MIXER_GETLINEINFOF_SOURCE );
fprintf( file, "/n/t======================================================================================/n");
fprintf( file, "/t== Source line. Index = %d ===========================================================/n", j );
fprintf( file, "/t======================================================================================/n");
PrintLineType( 1, line, file );
pMixerControl = new MIXERCONTROL[line.cControls];
ASSERT( pMixerControl != NULL );
mixerLineControl.cbStruct = sizeof( MIXERLINECONTROLS );
mixerLineControl.dwLineID = line.dwLineID;
mixerLineControl.cControls = line.cControls;
mixerLineControl.cbmxctrl = sizeof( MIXERCONTROL );
mixerLineControl.pamxctrl = pMixerControl;
mixerGetLineControls( ( HMIXEROBJ )hMixer, &mixerLineControl, MIXER_GETLINECONTROLSF_ALL );
UINT ncontrols = line.cControls;
for( UINT k = 0; k < ncontrols; k++ )
{
PrintControl( ( HMIXEROBJ )hMixer, line, pMixerControl[k], file );
}
delete[] pMixerControl;
}
}
fclose( file );
mixerClose(hMixer);
}

本文转自
http://blog.csdn.net/zgl7903/archive/2008/10/09/3044702.aspx

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