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KSAC3_BIT_STREAM_MODE structure (ksmedia.h)

  • Article

The KSAC3_BIT_STREAM_MODE structure specifies the bit-stream mode, which is the type of audio service that is encoded into an AC-3 stream.

Syntax

typedef struct {
  LONG BitStreamMode;
} KSAC3_BIT_STREAM_MODE, *PKSAC3_BIT_STREAM_MODE;

Members

BitStreamMode

Specifies the bit-stream mode. The BitStreamMode member is set to a value in the range 0 to 7.

Specify the value of this member as one of the following constants:

Constant Value
KSAC3_SERVICE_MAIN_AUDIO 0
KSAC3_SERVICE_NO_DIALOG 1
KSAC3_SERVICE_VISUALLY_IMPAIRED 2
KSAC3_SERVICE_HEARING_IMPAIRED 3
KSAC3_SERVICE_DIALOG_ONLY 4
KSAC3_SERVICE_COMMENTARY 5
KSAC3_SERVICE_EMERGENCY_FLASH 6
KSAC3_SERVICE_VOICE_OVER 7

These constants correspond to the bit-stream modes that are defined in the AC-3 specification. For more information, see the following Remarks section.

Remarks

This structure is used by the KSPROPERTY_AC3_BIT_STREAM_MODE property.

For more information about bit stream modes, see the AC-3 specification at the Dolby Laboratories website. The specification is titled Digital Audio Compression Standard (AC-3).

Requirements

Requirement Value
Header ksmedia.h (include Ksmedia.h)

See also

KSPROPERTY_AC3_BIT_STREAM_MODE