MIDIOUTCAPS

typedef struct midioutcaps_tag {
    UINT  wMid;
    UINT  wPid;
    VERSION  vDriverVersion;
    char  szPname[MAXPNAMELEN];
    UINT  wTechnology;
    UINT  wVoices;
    UINT  wNotes;
    UINT  wChannelMask;
    DWORD  dwSupport;
} MIDIOUTCAPS;
 

Describes the capabilities of a MIDI output device.

Members

wMid

Specifies a manufacturer ID for the device driver for the MIDI output device. Manufacturer IDs are defined in the Multimedia Programmer's Reference in the Microsoft Windows Software Development Kit.

wPid

Specifies a product ID for the MIDI output device. Product IDs are defined in the Multimedia Programmer's Reference in the Microsoft Windows Software Development Kit.

vDriverVersion

Specifies the version number of the device driver for the MIDI output device. The high-order byte is the major version number, and the low-order byte is the minor version number. The numbering is up to the driver developer but should be changed with each driver release.

szPname[MAXPNAMELEN]

Specifies the product name in a NULL-terminated string.

wTechnology

Describes the type of the MIDI output device according to one of the following flags:

MOD_MIDIPORT	Indicates the device is a MIDI hardware port.
MOD_SQSYNTH	Indicates the device is a square wave synthesizer.
MOD_FMSYNTH	Indicates the device is an FM synthesizer.
MOD_MAPPER	Indicates the device is the Microsoft MIDI Mapper.

wVoices

Specifies the number of voices supported by an internal synthesizer device. If the device is a port, the field is not meaningful and should be set to 0.

wNotes

Specifies the maximum number of simultaneous notes that can be played by an internal synthesizer device. If the device is a port, the field should be set to 0.

wChannelMask

Specifies the channels that an internal synthesizer device responds to, where the least significant bit refers to channel 0 and the most significant bit to channel 15. Port devices transmit on all channels and should set this field to 0xFFFF.

dwSupport

Specifies optional functionality supported by the device.

MIDICAPS_CACHE	Supports patch caching.
MIDICAPS_VOLUME	Supports volume control.
MIDICAPS_LRVOLUME	Supports separate left and right volume control.
	MIDICAPS_STREAM
	Supports MIDI streams natively.

If a device supports volume changes, the MIDICAPS_VOLUME flag should be set for the dwSupport field. If a device supports separate volume changes on the left and right channels, both the MIDICAPS_VOLUME and the MIDICAPS_LRVOLUME flags should be set for this field.

See Also

MODM_GETDEVCAPS