IMpegAudioDecoder::get_DualMode method (mpegtype.h)

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Returns which channel is currently being decoded.

Syntax

HRESULT get_DualMode(
  [out] unsigned long *pIntDecode
);

Parameters

[out] pIntDecode

Indicates the channel(s) to be decoded.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.

Remarks

The pIntDecode parameter can have one of the values in the following table.

Constant	Description
AM_MPEG_AUDIO_DUAL_MERGE	Both channels are decoded.
AM_MPEG_AUDIO_DUAL_LEFT	The left channel is decoded.
AM_MPEG_AUDIO_DUAL_RIGHT	The right channel is decoded.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	mpegtype.h
Library	Strmiids.lib

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