estrutura ACX_STREAMAUDIOENGINE_CALLBACKS (acxelements.h)

  • Artigo

A estrutura ACX_STREAMAUDIOENGINE_CALLBACKS identifica os retornos de chamada do driver para operações do mecanismo de áudio de fluxo ACX.

Sintaxe

typedef struct _ACX_STREAMAUDIOENGINE_CALLBACKS {
  ULONG                                                     Size;
  PFN_ACX_STREAMAUDIOENGINE_ASSIGN_EFFECTS_STATE            EvtAcxStreamAudioEngineAssignEffectsState;
  PFN_ACX_STREAMAUDIOENGINE_RETRIEVE_EFFECTS_STATE          EvtAcxStreamAudioEngineRetrieveEffectsState;
  PFN_ACX_STREAMAUDIOENGINE_RETRIEVE_PRESENTATION_POSITION  EvtAcxStreamAudioEngineRetrievePresentationPosition;
  PFN_ACX_STREAMAUDIOENGINE_ASSIGN_CURRENT_WRITE_POSITION   EvtAcxStreamAudioEngineAssignCurrentWritePosition;
  PFN_ACX_STREAMAUDIOENGINE_RETRIEVE_LINEAR_BUFFER_POSITION EvtAcxStreamAudioEngineRetrieveLinearBufferPosition;
  PFN_ACX_STREAMAUDIOENGINE_ASSIGN_LAST_BUFFER_POSITION     EvtAcxStreamAudioEngineAssignLastBufferPosition;
  PFN_ACX_STREAMAUDIOENGINE_ASSIGN_LOOPBACK_PROTECTION      EvtAcxStreamAudioEngineAssignLoopbackProtection;
  PFN_ACX_OBJECT_PROCESS_REQUEST                            EvtAcxStreamAudioEngineProcessRequest;
} ACX_STREAMAUDIOENGINE_CALLBACKS, *PACX_STREAMAUDIOENGINE_CALLBACKS;

Membros

Size

O comprimento, em bytes, dessa estrutura.

EvtAcxStreamAudioEngineAssignEffectsState

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_ASSIGN_EFFECTS_STATE .

EvtAcxStreamAudioEngineRetrieveEffectsState

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_RETRIEVE_EFFECTS_STATE .

EvtAcxStreamAudioEngineRetrievePresentationPosition

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_RETRIEVE_PRESENTATION_POSITION .

EvtAcxStreamAudioEngineAssignCurrentWritePosition

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_ASSIGN_CURRENT_WRITE_POSITION.

EvtAcxStreamAudioEngineRetrieveLinearBufferPosition

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_RETRIEVE_LINEAR_BUFFER_POSITION .

EvtAcxStreamAudioEngineAssignLastBufferPosition

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_ASSIGN_LAST_BUFFER_POSITION.

EvtAcxStreamAudioEngineAssignLoopbackProtection

O retorno de chamada EVT_ACX_STREAMAUDIOENGINE_ASSIGN_LOOPBACK_PROTECTION.

EvtAcxStreamAudioEngineProcessRequest

O retorno de chamada EVT_ACX_OBJECT_PROCESS_REQUEST .

Comentários

Exemplo

O uso de exemplo é mostrado abaixo.

        ACX_STREAMAUDIOENGINE_CALLBACKS streamAudioEngineCallbacks;

        // Create the AudioEngine element to control offloaded streaming.
        ACX_STREAMAUDIOENGINE_CALLBACKS_INIT(&streamAudioEngineCallbacks);

        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineAssignEffectsState = CodecR_EvtAcxStreamAudioEngineAssignEffectsState;
        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineRetrieveEffectsState = CodecR_EvtAcxStreamAudioEngineRetrieveEffectsState;
        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineRetrievePresentationPosition = CodecR_EvtAcxStreamAudioEngineRetrievePresentationPosition;
        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineAssignCurrentWritePosition = CodecR_EvtAcxStreamAudioEngineAssignCurrentWritePosition;
        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineRetrieveLinearBufferPosition = CodecR_EvtAcxStreamAudioEngineRetrieveLinearBufferPosition;
        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineAssignLastBufferPosition = CodecR_EvtAcxStreamAudioEngineAssignLastBufferPosition;
        streamAudioEngineCallbacks.EvtAcxStreamAudioEngineAssignLoopbackProtection = CodecR_EvtAcxStreamAudioEngineAssignLoopbackProtection;

Requisitos do ACX

Versão mínima do ACX: 1.0

Para obter mais informações sobre as versões do ACX, consulte Visão geral da versão do ACX.

Requisitos

Requisito Valor
Cabeçalho acxelements.h

Confira também