// bthhfpddi.h

// CTL_CODE(0x0022, 0x00b, METHOD_NEITHER, FILE_ANY_ACCESS)
#define IOCTL_BTHHFP_STREAM_CLOSE 0x0022002F
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Windows Driver Kit DDI reference (ni-bthhfpddi-ioctl_bthhfp_stream_close)

IOCTL_BTHHFP_STREAM_CLOSE IOCTL

Description

The IOCTL_BTHHFP_STREAM_CLOSE IOCTL indicates that the client driver no longer requires the synchronous connection-oriented (SCO) channel for streaming audio.

Parameters

Major code

Input buffer

N/A

Input buffer length

N/A

Output buffer

N/A

Output buffer length

N/A

Input/output buffer

Input/output buffer length

Status block

N/A

Remarks

The request completes immediately.

The audio driver starts this request when the KS pin transitions to the KSSTATE_STOP state, and should not finish the pin state transition until this request completes.

IOCTL_BTHHFP_STREAM_CLOSE - NtDoc