|
mixerGetLineInfo
The mixerGetLineInfo function retrieves information about a specific line of a mixer device.
MMRESULT mixerGetLineInfo(
HMIXEROBJ hmxobj,
|
| LPMIXERLINE pmxl,
|
| DWORD fdwInfo
|
| );
|
|
Parameters
hmxobj
Handle of the mixer device object that controls the specific audio line.
pmxl
Address of a MIXERLINE structure. This structure is filled with information about the audio line for
the mixer device. The cbStruct member must always be initialized to be the size, in bytes, of the MIXERLINE structure.
fdwInfo
Flags for retrieving information about an audio line. The following values are
defined:
MIXER_GETLINEINFOF_COMPONENTTYPE
The pmxl parameter will receive information about the first audio line of the type
specified in the dwComponentType member of the MIXERLINE structure. This flag is used to retrieve information about an audio line of a
specific component type. Remaining structure members except cbStruct require no further initialization.
MIXER_GETLINEINFOF_DESTINATION
The pmxl parameter will receive information about the destination audio line specified
by the dwDestination member of the MIXERLINE structure. This index ranges from zero to one less than the value in the cDestinations member of the MIXERCAPS structure. All remaining structure members except cbStruct require no further initialization.
MIXER_GETLINEINFOF_LINEID
The pmxl parameter will receive information about the audio line specified by the dwLineID member of the MIXERLINE structure. This is usually used to retrieve updated information about the
state of an audio line. All remaining structure members except cbStruct require no further initialization.
MIXER_GETLINEINFOF_SOURCE
The pmxl parameter will receive information about the source audio line specified by
the dwDestination and dwSource members of the MIXERLINE structure. The index specified by dwDestination ranges from zero to one less than the value in the cDestinations member of the MIXERCAPS structure. The index specified by dwSource ranges from zero to one less than the value in the cConnections member of the MIXERLINE structure returned for the audio line stored in the dwDestination member. All remaining structure members except cbStruct require no further initialization.
MIXER_GETLINEINFOF_TARGETTYPE
The pmxl parameter will receive information about the audio line that is for the dwType member of the Target structure, which is a member of the MIXERLINE structure. This flag is used to retrieve information about an audio line that
handles the target type (for example, MIXERLINE_TARGETTYPE_WAVEOUT). An
application must initialize the dwType, wMid, wPid, vDriverVersion and szPname members of the MIXERLINE structure before calling mixerGetLineInfo. All of these values can be retrieved from the device capabilities structures
for all media devices. Remaining structure members except cbStruct require no further initialization.
MIXER_OBJECTF_AUX
The hmxobj parameter is an auxiliary device identifier in the range of zero to one less
than the number of devices returned by the auxGetNumDevs function.
MIXER_OBJECTF_HMIDIIN
The hmxobj parameter is the handle of a MIDI input device. This handle must have been
returned by the midiInOpen function.
MIXER_OBJECTF_HMIDIOUT
The hmxobj parameter is the handle of a MIDI output device. This handle must have been
returned by the midiOutOpen function.
MIXER_OBJECTF_HMIXER
The hmxobj parameter is a mixer device handle returned by the mixerOpen function. This flag is optional.
MIXER_OBJECTF_HWAVEIN
The hmxobj parameter is a waveform-audio input handle returned by the waveInOpen function.
MIXER_OBJECTF_HWAVEOUT
The hmxobj parameter is a waveform-audio output handle returned by the waveOutOpen function.
MIXER_OBJECTF_MIDIIN
The hmxobj parameter is the identifier of a MIDI input device. This identifier must be
in the range of zero to one less than the number of devices returned by the midiInGetNumDevs function.
MIXER_OBJECTF_MIDIOUT
The hmxobj parameter is the identifier of a MIDI output device. This identifier must be
in the range of zero to one less than the number of devices returned by the midiOutGetNumDevs function.
MIXER_OBJECTF_MIXER
The hmxobj parameter is a mixer device identifier in the range of zero to one less than
the number of devices returned by the mixerGetNumDevs function. This flag is optional.
MIXER_OBJECTF_WAVEIN
The hmxobj parameter is the identifier of a waveform-audio input device in the range of
zero to one less than the number of devices returned by the waveInGetNumDevs function.
MIXER_OBJECTF_WAVEOUT
The hmxobj parameter is the identifier of a waveform-audio output device in the range of
zero to one less than the number of devices returned by the waveOutGetNumDevs function.
Return Values
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error
values include the following:
MIXERR_INVALLINE
| The audio line reference is invalid.
| MMSYSERR_BADDEVICEID
| The hmxobj parameter specifies an invalid device identifier.
| MMSYSERR_INVALFLAG
| One or more flags are invalid.
| MMSYSERR_INVALHANDLE
| The hmxobj parameter specifies an invalid handle.
| MMSYSERR_INVALPARAM
| One or more parameters are invalid.
| MMSYSERR_NODRIVER
| No mixer device is available for the object specified by hmxobj.
|
See Also
MIXERLINE, MIXERCAPS, auxGetNumDevs, midiInOpen, midiOutOpen, mixerOpen, waveInOpen, waveOutOpen, midiInGetNumDevs, midiOutGetNumDevs, mixerGetNumDevs, waveInGetNumDevs, waveOutGetNumDevs
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
