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The following table shows the messages passed to the PDD_WaveProc function to instruct the audio platform-dependent driver (PDD).
| Programming element | Description |
|---|---|
| WPDM_CLOSE | This message is passed to the PDD_WaveProc function to instruct the audio PDD that the driver's waveXXXClose function has been called. |
| WPDM_CONTINUE | This message is passed to the PDD_WaveProc function to instruct the audio PDD to continue with the data pointed to by the wave header. |
| WPDM_ENDOFDATA | This message is passed to the PDD_WaveProc function to instruct the audio PDD that no more output data is available and that the audio circuit should finish playing the data blocks already received. |
| WPDM_GETDEVCAPS | This message is passed to the PDD_WaveProc function to instruct the audio PDD to query the hardware to determine its capabilities. |
| WPDM_GETMIXERVAL | This message is passed to the PDD_WaveProc function to instruct the audio PDD to query one of the current mixer settings. |
| WPDM_GETVOLUME | This message is passed to the PDD_WaveProc function to instruct the audio PDD to query the current volume setting of the audio device. |
| WPDM_OPEN | This message is passed to the PDD_WaveProc function to instruct the audio PDD to indicate that the waveform device will be sent data of the specified format. |
| WPDM_PAUSE | This message is passed to the PDD_WaveProc function to instruct the audio PDD to pause playback. |
| WPDM_RESTART | This message is passed to the PDD_WaveProc function to instruct the audio PDD to continue playing the paused data. |
| WPDM_SETMIXERVAL | This message is passed to the PDD_WaveProc function to instruct the audio PDD to set one of the mixer values. |
| WPDM_SETVOLUME | This message is passed to the PDD_WaveProc function to instruct the audio PDD to modify the current volume setting of the audio device. |
| WPDM_STANDBY | This message is passed to the PDD_WaveProc function to instruct the audio PDD to put the audio circuitry in standby mode. |
| WPDM_START | This message is passed to the PDD_WaveProc function to instruct the audio PDD to start with the data pointed to by the wave header. |
| WPDM_STOP | This message is passed to the PDD_WaveProc function to instruct the audio PDD to stop playback or recording immediately. |
See Also
Waveform Audio Driver Structures | Waveform Audio Driver Functions | Waveform Input Driver Messages | Waveform Output Driver Messages | Audio PDD Functions
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