DMUS_PORTCAPS

The DMUS_PORTCAPS type returns information about the capabilities of a port. It is passed to the DirectMusicPerformance.GetPortCaps method.

Type DMUS_PORTCAPS
    lClass as Long
    lEffectFlags As Long
    lFlags As Long
    lMaxAudioChannels As Long
    lMaxChannelGroups As Long
    lMaxVoices As Long
    lMemorySize As Long
    lType As Long
End Type

Members

lClass

Class of this port. One of the members of the CONST_DMUS_PC_CLASS enumeration.

lEffectFlags

Flags from the CONST_DMUS_EFFECT_FLAGS enumeration indicating what audio effects are available on the port.

lFlags

Flags describing various capabilities of the port. See CONST_DMUS_PC_FLAGS.

lMaxAudioChannels

Maximum number of audio channels that can be rendered by the port. The value can be –1 if the driver does not support returning this parameter.

lMaxChannelGroups

Maximum number of channel groups supported by this port. A channel group is a set of 16 MIDI channels.

lMaxVoices

Maximum number of voices that can be allocated when this port is opened. The value can be –1 if the driver does not support returning this parameter.

lMemorySize

Amount of memory available to store DLS instruments. If the port is using system memory and the amount is therefore limited only by the available system memory, this field contains DMUS_PC_SYSTEMMEMORY.

lType

Type of this port. See CONST_DMUS_PORT_TYPE.