ACX_VOLUME_CONFIG - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// acxelements.h

typedef struct _ACX_VOLUME_CONFIG {
  ULONG                 Size;
  ULONG                 Id;
  const GUID            *Name;
  ULONG                 Flags;
  ULONG                 ChannelsCount;
  LONG                  Maximum;
  LONG                  Minimum;
  ULONG                 SteppingDelta;
  PACX_VOLUME_CALLBACKS Callbacks;
} ACX_VOLUME_CONFIG, *PACX_VOLUME_CONFIG;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-acxelements-acx_volume_config)

Description

The ACX_VOLUME_CONFIG structure is used to define the acx volume configuration.

Members

Size

The length, in bytes, of this structure.

Id

A number that represents the element ID.

Name

A pointer to a GUID that represents the name of the element. Can be used for debugging and will default to GUID_NULL if not provided.

Flags

Acx volume configuration flags defined by the ACX_VOLUME_CONFIG_FLAGS enum.

No flag bits are currently defined. Set this member to zero - AcxVolumeConfigNoFlags

ChannelsCount

The number of channels. This is a one based count.

Maximum

The maximum boost level for the volume.

Minimum

The minimum boost level for the volume.

SteppingDelta

The stepping delta for the volume.

Callbacks

The ACX_VOLUME_CALLBACKS structure that identifies the driver callbacks for ACX volume operations.

Remarks

Example

Example usage is shown below.

    ACX_VOLUME_CALLBACKS            volumeCallbacks;
    ACX_VOLUME_CONFIG               volumeCfg;

    ACX_VOLUME_CALLBACKS_INIT(&volumeCallbacks);
    volumeCallbacks.EvtAcxVolumeAssignLevel = CodecC_EvtVolumeAssignLevelCallback;
    volumeCallbacks.EvtAcxVolumeRetrieveLevel = CodecC_EvtVolumeRetrieveLevelCallback;

    ACX_VOLUME_CONFIG_INIT(&volumeCfg);
    volumeCfg.ChannelsCount = MAX_CHANNELS;
    volumeCfg.Minimum = VOLUME_LEVEL_MINIMUM;
    volumeCfg.Maximum = VOLUME_LEVEL_MAXIMUM;
    volumeCfg.SteppingDelta = VOLUME_STEPPING;
    volumeCfg.Callbacks = &volumeCallbacks;

ACX requirements

Minimum ACX version: 1.0

For more information about ACX versions, see ACX version overview.

See also

View the official Windows Driver Kit DDI reference

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