ACM Wrapper Filter (Compact 2013)
3/26/2014
The ACM Wrapper filter enables codecs that use the Audio Compression Manager (ACM) to join a DirectShow filter graph.
Decompression is only to PCM audio.
When wrapping a compressor, this filter appears in the audio compressor category and can support additional interfaces.
There should never be any need to add it manually to a graph; it is pulled in automatically by the Filter Graph Manager. It is used only for playback or sample rate conversion.
The ACM Wrapper filter supports the following ACM stream drivers and codecs:
- WMA
- G.711
- MP3
- MS ADPCM
- IMA ADPCM
The following table shows the filter properties.
Filter property |
Description |
|---|---|
Filter Interfaces |
|
Input Pin Media Types |
MEDIATYPE_Audio, MEDIASUBTYPE_NULL |
Input Pin Interfaces |
|
Output Pin Media Types |
MEDIATYPE_Audio, MEDIASUBTYPE_PCM. Any combination of the following is possible:
|
Output Pin Interfaces |
IMediaPosition, IMediaSeeking, IPin, IQualityControl |
Filter CLSID |
CLSID_ACMWrapper |
Executable |
Quartz.dll |
MERIT_NORMAL |
|
Filter Category |
CLSID_AudioCompressorCategory |