ACX_STREAMAUDIOENGINE_CALLBACKS 结构 (acxelements.h)

  • 项目

ACX_STREAMAUDIOENGINE_CALLBACKS 结构标识 ACX 流音频引擎操作的驱动程序回调。

语法

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;

成员

Size

此结构的长度（以字节为单位）。

EvtAcxStreamAudioEngineAssignEffectsState

EVT_ACX_STREAMAUDIOENGINE_ASSIGN_EFFECTS_STATE回调。

EvtAcxStreamAudioEngineRetrieveEffectsState

EVT_ACX_STREAMAUDIOENGINE_RETRIEVE_EFFECTS_STATE回调。

EvtAcxStreamAudioEngineRetrievePresentationPosition

EVT_ACX_STREAMAUDIOENGINE_RETRIEVE_PRESENTATION_POSITION回调。

EvtAcxStreamAudioEngineAssignCurrentWritePosition

EVT_ACX_STREAMAUDIOENGINE_ASSIGN_CURRENT_WRITE_POSITION回调。

EvtAcxStreamAudioEngineRetrieveLinearBufferPosition

EVT_ACX_STREAMAUDIOENGINE_RETRIEVE_LINEAR_BUFFER_POSITION回调。

EvtAcxStreamAudioEngineAssignLastBufferPosition

EVT_ACX_STREAMAUDIOENGINE_ASSIGN_LAST_BUFFER_POSITION回调。

EvtAcxStreamAudioEngineAssignLoopbackProtection

EVT_ACX_STREAMAUDIOENGINE_ASSIGN_LOOPBACK_PROTECTION回调。

EvtAcxStreamAudioEngineProcessRequest

EVT_ACX_OBJECT_PROCESS_REQUEST回调。

备注

示例

示例用法如下所示。

        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;

ACX 要求

最低 ACX 版本： 1.0

有关 ACX 版本的详细信息，请参阅 ACX 版本概述。

要求

要求 值
Header acxelements.h

另请参阅