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Waveform Output Driver Messages (Windows Embedded CE 6.0)

  • Article

1/6/2010

The following table shows the waveform output driver messages (WODM_XXX).

Programming element Description

WODM_BREAKLOOP

This message is used to request a waveform output driver to break an output loop that was created with a WODM_WRITE message.

WODM_CLOSE

This message is used to request a waveform output driver to close a specified stream that was previously opened with a WODM_OPEN message.

WODM_GETDEVCAPS

This message is used to request a waveform output driver to return the capabilities of a specified device.

WODM_GETEXTDEVCAPS

This message is used in an MMDRV_MESSAGE_PARAMS structure passed to the WAV_IOControl function to request a waveform output driver to return the extended capabilities of a specified device.

WODM_GETNUMDEVS

This message is used to request a waveform output driver to return the number of device instances that it supports.

WODM_GETPITCH

This message is used to request a waveform output driver to return the specified device's current pitch multiplier value.

WODM_GETPLAYBACKRATE

This message is to request a waveform output driver to return the current playback rate multiplier value for the specified device.

WODM_GETPOS

This message is used to return the current position within a stream. The position is relative to the beginning of the waveform.

WODM_GETPROP

This message is used to request the properties of a waveform output driver.

WODM_GETVOLUME

This message is used to request a waveform output driver to return the current volume level setting for the specified device or stream.

WODM_OPEN

This message is used to request a waveform output driver to open a stream on the specified device.

WODM_PAUSE

This message is used to request a waveform output driver to pause playback of a waveform.

WODM_PREPARE

This message is used to request a waveform output driver to prepare a system-exclusive data buffer for output.

WODM_RESET

This message is used to request a waveform output driver to stop sending output data and return all output buffers to the list.

WODM_RESTART

This message is used to request a waveform output driver to continue playback of a waveform after playback has been paused with WODM_PAUSE.

WODM_SETPITCH

This message is used to request a waveform output driver to set the specified device's pitch multiplier value.

WODM_SETPLAYBACKRATE

This message is used to request a waveform output driver to set the playback rate multiplier value for the specified device.

WODM_SETPROP

This message isused to request a waveform output driver to change properties.

WODM_SETVOLUME

This message is used to request a waveform output driver to set the playback rate multiplier value for the specified device.

WODM_UNPREPARE

This message is used to request a waveform output driver to remove the buffer preparation performed in response to WODM_PREPARE.

WODM_WRITE

This message is used to request a waveform output driver to write a waveform data block to the specified device.

See Also

Reference

Waveform Input Driver Messages
WPDM Messages
Audio PDD Functions
Waveform Audio Driver Functions
Waveform Audio Driver Structures

Other Resources

Waveform Audio Driver Reference