再议AVStream打开流程

• Create CCaptureFilter
  • CCapturePin::IntersectHandler - Filter 格式枚举并校验
  • CCapturePin::DispatchSetFormat - PKSPIN 格式选择
  • Create CCapturePin
    • CCapturePin::SetState FromState:KSSTATE_STOP ———> ToState:KSSTATE_ACQUIRE - PKSPIN
    • CCapturePin::SetState FromState:KSSTATE_ACQUIRE ———> ToState:KSSTATE_PAUSE
    • CCapturePin::SetState FromState:KSSTATE_PAUSE ———> ToState:KSSTATE_RUN
    • CCapturePin::Process
      …
    • CCapturePin::SetState FromState:KSSTATE_RUN ———> ToState:KSSTATE_PAUSE
    • CCapturePin::SetState FromState:KSSTATE_PAUSE ———> ToState:KSSTATE_ACQUIRE
    • CCapturePin::SetState FromState:KSSTATE_ACQUIRE ———> ToState:KSSTATE_STOP
  • Cleanup CCapturePin
• Cleanup CCaptureFilter