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

Description

The AcxAudioModuleCreate function is used to create an audio module that that will be associated with an ACX circuit object parent.

Parameters

`Object`

A WDFDEVICE object (described in Summary of Framework Objects) that that will be associated with the circuit.

`Attributes`

Additional Attributes defined using a WDF_OBJECT_ATTRIBUTES structure that are used to set various values and to associate the audio module with the ACX circuit object.

`Config`

An initialized ACX_AUDIOMODULE_CONFIG structure that describes the configuration of the audio module.

`AudioModule`

A pointer to a location that receives the handle to the new ACXMODULE object. For more information about ACX objects, see Summary of ACX Objects.

Return value

Returns STATUS_SUCCESS if the call was successful. Otherwise, it returns an appropriate error code. For more information, see Using NTSTATUS Values.

Remarks

Example

Example usage is shown below.

    NTSTATUS                        status;
    WDF_OBJECT_ATTRIBUTES           attributes;
    ACX_AUDIOMODULE_CALLBACKS       audioModuleCallbacks;
    ACX_AUDIOMODULE_CONFIG          audioModuleCfg;
    ACXAUDIOMODULE                  audioModuleElement;

    // Now add audio modules to the circuit
    // module 0

    ACX_AUDIOMODULE_CALLBACKS_INIT(&audioModuleCallbacks);
    audioModuleCallbacks.EvtAcxAudioModuleProcessCommand = CodecR_EvtProcessCommand0;

    ACX_AUDIOMODULE_CONFIG_INIT(&audioModuleCfg);

    audioModuleCfg.Name = &AudioModule0Id;
    audioModuleCfg.Descriptor.ClassId = AudioModule0Id;
    audioModuleCfg.Descriptor.InstanceId = AUDIOMODULE_INSTANCE_ID(0,0);
    audioModuleCfg.Descriptor.VersionMajor = AUDIOMODULE0_MAJOR;
    audioModuleCfg.Descriptor.VersionMinor = AUDIOMODULE0_MINOR;
    wcsncpy_s(audioModuleCfg.Descriptor.Name,
                ACX_AUDIOMODULE_MAX_NAME_CCH_SIZE,
                AUDIOMODULE0DESCRIPTION,
                wcslen(AUDIOMODULE0DESCRIPTION));
    audioModuleCfg.Callbacks = &audioModuleCallbacks;

    WDF_OBJECT_ATTRIBUTES_INIT_CONTEXT_TYPE(&attributes, CODEC_AUDIOMODULE0_CONTEXT);
    attributes.ParentObject = Circuit;

    status = AcxAudioModuleCreate(Circuit, &attributes, &audioModuleCfg, &audioModuleElement);

ACX requirements

Minimum ACX version: 1.0

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

AcxAudioModuleCreate - NtDoc