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Windows Driver Kit DDI reference (nf-acxelements-acxvolumechangelevelnotification)

Description

The AcxVolumeChangeLevelNotification function sends a notification of a volume level change on an ACXVOLUME object so that ACX can generate a corresponding event.

Parameters

`Volume`

An ACXVOLUME object whose volume level has changed. For more information about ACX objects, see Summary of ACX Objects.

Remarks

Example

Example usage is shown below.

    PCODEC_VOLUME_TIMER_CONTEXT timerCtx = GetCodecVolumeTimerContext(Timer);
    PCODEC_VOLUME_ELEMENT_CONTEXT volumeCtx = GetCodecVolumeElementContext(timerCtx->VolumeElement);

    // Toggle volume between max and min
    for (ULONG i = 0; i < MAX_CHANNELS; ++i)
    {
        volumeCtx->VolumeLevel[i] = volumeCtx->VolumeLevel[i] == VOLUME_LEVEL_MAXIMUM ? VOLUME_LEVEL_MINIMUM : VOLUME_LEVEL_MAXIMUM;
    }

    AcxVolumeChangeLevelNotification(timerCtx->VolumeElement);

ACX requirements

Minimum ACX version: 1.0

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

AcxVolumeChangeLevelNotification - NtDoc