Msfilter

SUMMARY

This sample – like the samples for Msgsm610 and Imaadpcm – illustrates how to implement an Audio Compression Manager (ACM) software codec. The Msfilter sample provides routines for volume and echo effects that can be applied to any audio content.

The sample works on both x86 and Alpha platforms. It is 64-bit compliant, but requires the addition of 64-bit headers before compilation. It builds properly with Microsoft® Visual C® 6.0.

The sample does not support Plug and Play, power management, or OnNow. These features are not applicable to ACM software codecs.

BUILDING THE SAMPLE

To build the sample, run the build command in the Msfilter sample directory. If the build succeeds, it produces the file Msfltr32.acm.

CODE TOUR

File Manifest

File           Description

codec.c        ACM driver interfaces

codec.h        Header file for codec.c

codec.ico      Custom icon for this codec

codec.rc       String and dialog resources

codec.rcv      Version resource

debug.c        Debug utilities

debug.h        Header file for debug.c

init.c         Driver initialization routines

msfilter.c     The filter algorithm

msfilter.h     Header file for msfilter.c

msfilter.def   Module definition file for linker

oemsetup.inf   Sample installation file for the driver

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