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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]
Specifies whether the audio is encoded in Dolby Surround. This enumeration is used with the AVDDSurroundMode property.
Syntax
typedef enum eAVDDSurroundMode {
eAVDDSurroundMode_NotIndicated = 0,
eAVDDSurroundMode_No = 1,
eAVDDSurroundMode_Yes = 2
} ;
Constants
eAVDDSurroundMode_NotIndicatedValue: 0 The bit stream does not indicate whether the audio is encoded in Dolby Surround. |
eAVDDSurroundMode_NoValue: 1 The bit stream is not encoded in Dolby Surround. |
eAVDDSurroundMode_YesValue: 2 The bit stream is encoded in Dolby Surround. |
Remarks
If the audio stream is Dolby AC-3, this property reflects the value of the dsurmod field in the bit stream.
| Bit field | Value |
|---|---|
| 00 | eAVDDSurroundMode_NotIndicated |
| 01 | eAVDDSurroundMode_No |
| 10 | eAVDDSurroundMode_Yes |
If the audio stream is any other format, the value is eAVDDSurroundMode_No.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps | UWP apps] |
| Minimum supported server | Windows 2000 Server [desktop apps | UWP apps] |
| Header | codecapi.h |