Methods > Players and stream mixers > StreamVolumeDirectSoundBufferGet method

Remarks

Retrieves the current volume, applied directly to the DirectSound buffer, for the given player. This volume can be changed through the StreamVolumeDirectSoundBufferSet method.

Syntax

[Visual Basic]

control.StreamVolumeDirectSoundBufferGet (

nPlayer as Integer,

nScaleType as enumVolumeScales

) as single

[C++]

float control.StreamVolumeDirectSoundBufferGet (

short nPlayer,

short nScaleType

);

Parameter

Description

nPlayer

Number representing the zero-based index of the involved player

nScaleType

The volume scaling type.

Supported values are the following:

Mnemonic constant

Value

Meaning

SCALE_LINEAR

The returned volume is based upon a linear scale and can be in the range from 0.0 (silence) to 100.0 (max volume)

SCALE_LOG

The returned volume, expressed in dB, is based upon a logarithmic scale and can be in the range from -100 (silence) to 0 (max volume)

The actual applied formula for converting a linear volume into a logarithmic volume is the following:

VolumeInDB = 20 * log10 (VolumeLinear/100)

The C syntax for converting a logarithmic volume into a linear volume is the following:

VolumeLinear = 100 * pow (10, VolumeInDB/20);

Return value

Value	Meaning

Negative value	An error occurred (see the LastError property for further error details)
>= 0	The current volume (the meaning of the passed value depends upon the nScaleType parameter).