ACM Driver Messages

The ACM passes the following messages to ACM drivers:

ACMDM_DRIVER_ABOUT

Requests that the driver display its About dialog box.

ACMDM_DRIVER_DETAILS

Requests that the driver return detailed information about its capabilities.

ACMDM_DRIVER_NOTIFY

Notifies the driver of changes to other ACM drivers.

ACMDM_FILTER_DETAILS

Requests information about a filter associated with a specified filter tag.

ACMDM_FILTERTAG_DETAILS

Requests information about a specified filter tag.

ACMDM_FORMAT_DETAILS

Requests information about the format associated with a specified filter tag.

ACMDM_FORMAT_SUGGEST

Requests that the driver suggest a target conversion format for a specified source format.

ACMDM_FORMATTAG_DETAILS

Requests information about a format tag.

ACMDM_HARDWARE_WAVE_CAPS_INPUT

Requests information about the input capabilities of the audio hardware.

ACMDM_HARDWARE_WAVE_CAPS_OUTPUT

Requests information about the output capabilities of the audio hardware.

ACMDM_STREAM_CLOSE

Requests that the driver close a conversion stream.

ACMDM_STREAM_CONVERT

Requests that the driver convert an audio stream.

ACMDM_STREAM_OPEN

Requests that the driver open a new audio stream.

ACMDM_STREAM_PREPARE

Requests that the driver prepare any buffers associated with an audio stream.

ACMDM_STREAM_RESET

Requests that the driver stop operations on an audio stream.

ACMDM_STREAM_SIZE

Requests that the driver return the size required for a source or destination buffer.

ACMDM_STREAM_UNPREPARE

Requests that the driver clear any prepared buffers associated with an audio stream.