WinCE5下的音频驱动初探

 两种驱动模式
(1)UAM---Unified Audio Model:The following illustration shows the UAM stack.

(2)MDD-PDD:The following illustration shows the interaction of the audio driver using the MDD library.

Wavemdd.lib和Wavepdd.lib最终被连接在一起生成音频驱动程序Wavedev.dll
The DeviceIOControl portion of the stream interface allows arbitrary operations on files, making it possible to manipulate audio hardware using the WAV_IOControl function. To send commands to the audio hardware, the OS passes various messages to WAV_IOControl. For example, to prepare the audio hardware for recording, the middleware uses WAV_IOControl to send the WIDM_PREPARE message to the audio driver.

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