The acmFilterEnum function enumerates waveform-audio filters available for a given filter tag from an ACM driver. This function continues enumerating until there are no more suitable filters for the filter tag or the callback function returns FALSE.
MMRESULT acmFilterEnum(
HACMDRIVER had,
LPACMFILTERDETAILS pafd,
ACMFILTERENUMCB fnCallback,
DWORD dwInstance,
DWORD fdwEnum
);
Returns zero if successful or an error otherwise. Possible error values include the following:
Value | Description |
---|---|
ACMERR_NOTPOSSIBLE | The details for the filter cannot be returned. |
MMSYSERR_INVALFLAG | At least one flag is invalid. |
MMSYSERR_INVALHANDLE | The specified handle is invalid. |
MMSYSERR_INVALPARAM | At least one parameter is invalid. |
The acmFilterEnum function will return MMSYSERR_NOERROR (zero) if no suitable ACM drivers are installed. Moreover, the callback function will not be called.
The following functions should not be called from within the callback function: acmDriverAdd, acmDriverRemove, and acmDriverPriority.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in msacm.h.
Import Library: Use msacm32.lib.
Unicode: Implemented as Unicode and ANSI versions on Windows NT.
Audio Compression Manager Overview, Audio Compression Functions, WAVEFILTER, ACMFILTERDETAILS, acmDriverAdd, acmDriverRemove, acmDriverPriority