Class EXTBFormat
AL_EXT_BFORMAT
extension.
This extension indicates support for the FORMAT_BFORMAT2D_8
, FORMAT_BFORMAT2D_16
, FORMAT_BFORMAT2D_FLOAT32
, FORMAT_BFORMAT3D_8
,
FORMAT_BFORMAT3D_16
and FORMAT_BFORMAT3D_FLOAT32
buffer formats. These provide 2D (WXY) and 3D (WXYZ) 8bit int, 16bit int and ALfloat support for
Ambisonic three- or four-channel B-Format (using W X Y Z channel ordering, encoded as the first three or four channels of Furse-Malham higher order
Ambisonics). Use of these formats indicate that sources are Ambisonic sources. Such sources can be oriented via Sourcefv
using the
ORIENTATION
tag, which takes the same parameters as alListenerfv(AL_ORIENTATION,...)
. Such sources DO support SOURCE_RELATIVE
and the
soundfield will rotate to reflect the listener's orientation if this is off (the default). Other behaviour is as for stereo or multichannel assets.
Note that Ambisonics orients X, Y and Z axes in a different way to OpenAL. For clarity, we ignore the Ambisonic coordinate system in the API and stick to the OpenAL one, making sure that the Front of the Ambisonic soundfield (actually Ambisonic +X) matches the Front of the OpenAL coordinate system (-Z by default) etc. For instance, if the orientation of the source is set so that the "at" vector is to the left, then the front of the B-Format soundfield will be presented to the left.
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
Ambisonic formats.static final int
Ambisonic formats.static final int
Ambisonic formats.static final int
Ambisonic formats.static final int
Ambisonic formats.static final int
Ambisonic formats. -
Method Summary
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Field Details
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AL_FORMAT_BFORMAT2D_16
public static final int AL_FORMAT_BFORMAT2D_16Ambisonic formats.- See Also:
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AL_FORMAT_BFORMAT2D_8
public static final int AL_FORMAT_BFORMAT2D_8Ambisonic formats.- See Also:
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AL_FORMAT_BFORMAT2D_FLOAT32
public static final int AL_FORMAT_BFORMAT2D_FLOAT32Ambisonic formats.- See Also:
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AL_FORMAT_BFORMAT3D_16
public static final int AL_FORMAT_BFORMAT3D_16Ambisonic formats.- See Also:
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AL_FORMAT_BFORMAT3D_8
public static final int AL_FORMAT_BFORMAT3D_8Ambisonic formats.- See Also:
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AL_FORMAT_BFORMAT3D_FLOAT32
public static final int AL_FORMAT_BFORMAT3D_FLOAT32Ambisonic formats.- See Also:
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