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_BRB_SCO_GET_SYSTEM_INFO structure (bthddi.h)

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The _BRB_SCO_GET_SYSTEM_INFO structure describes information about the local system's support for SCO connections.

Syntax

struct _BRB_SCO_GET_SYSTEM_INFO {
  BRB_HEADER Hdr;
  ULONG      Features;
  ULONG      MaxChannels;
  ULONG      TransferUnit;
  USHORT     PacketTypes;
  USHORT     DataFormats;
  ULONG      Reserved;
};

Members

Hdr

A BRB_HEADER structure that contains information about the current BRB.

Features

A flag or combination of flags that indicates what SCO features the system supports. Possible values include:

SCO_FEATURE_ESCO_LINKS
SCO_FEATURE_SCO_LINKS

MaxChannels

The maximum number of active SCO channels that the system supports. This member is set to 0xFFFF if there is no limit or if the limit is unknown.

TransferUnit

The minimum data transfer speed per each request, in milliseconds . Set to 0xFFFF if this value is variable or unknown.

PacketTypes

A flag or combination of flags that indicates the type of SCO data packets that the local system supports. These SCO packet types are defined by the Bluetooth SIG. See the Bluetooth specification for more information about these flags. Possible values include:

SCO_HV1
SCO_HV2
SCO_HV3
SCO_EV3
SCO_EV4
SCO_EV5

DataFormats

A flag or combination of flags the indicates the voice-encoding data formats supported by the local system. Possible values include:

SCO_DATA_FORMAT_A_LAW_LOG
SCO_DATA_FORMAT_CVSD
SCO_DATA_FORMAT_MU_LAW_LOG
SCO_DATA_FORMAT_TRANSPARENT

Reserved

Reserved for future use. Do not use.

Remarks

To get the local system's support for SCO connections, profile drivers should build and send a BRB_SCO_GET_SYSTEM_INFO request.

Higher-level profile drivers can build and send a BRB_SCO_GET_SYSTEM_INFO request to determine whether the local Bluetooth driver stack supports SCO connections, the maximum number of SCO channels that the system supports, and other useful information for opening a SCO connection to a remote device.

Requirements

Requirement Value
Minimum supported client Versions:_Supported in Windows Vista, and later.
Header bthddi.h (include Bthddi.h)

See also

BRB_HEADER

BRB_SCO_GET_SYSTEM_INFO