AcxDataFormatGetChannelMask - NtDoc
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// acxdataformat.h
ULONGLONG AcxDataFormatGetChannelMask(
[in] ACXDATAFORMAT DataFormat
);
View the official Windows Driver Kit DDI referenceNo description available.
The AcxDataFormatGetChannelMask function gets the channel mask for the specified data format.
DataFormat [in]The data format for which to retrieve the channel mask.
Returns a ULONGLONG value containing the channel mask.
The channel mask specifies the mapping of channels to speakers.
The following table shows the meaning of each bit in the channel mask:
| Bit number | Speaker position | Description |
|---|---|---|
| 0 | FL | Front left |
| 1 | FR | Front right |
| 2 | FC | Front center |
| 3 | LFE | Low-frequency effects |
| 4 | BL | Back left |
| 5 | BR | Back right |
| 6 | FLC | Front left of center |
| 7 | FRC | Front right of center |
| 8 | BC | Back center |
| 9 | SL | Side left |
| 10 | SR | Side right |
Minimum ACX version: 1.0
For more information about ACX versions, see ACX version overview.