al::AmbiDecode Class Reference

#include <C:/Users/Andres/source/repos/casm_viewer/external/tinc/external/allolib/include/al/sound/al_Ambisonics.hpp>

Inheritance diagram for al::AmbiDecode:

Public Member Functions
	AmbiDecode (int dim, int order, int numSpeakers, int flavor=1)
virtual void	decode (float *dec, const float *enc, int numDecFrames) const
float	decodeWeight (int speaker, int channel) const
int	flavor () const
	Returns decode flavor.
int	numSpeakers () const
	Returns number of speakers.
void	print (std::ostream &stream) const
void	flavor (int type)
	Set decoding algorithm.
void	numSpeakers (int num)
	Set number of speakers. Positions are zeroed upon resize.
void	setSpeakerRadians (int index, int deviceChannel, float azimuth, float elevation, float amp=1.f)
void	setSpeaker (int index, int deviceChannel, float azimuth, float elevation=0, float amp=1.f)
void	setSpeakers (Speakers *spkrs)
void	setSpeakers (Speakers &spkrs)
Speaker &	speaker (int num)
	Get speaker.
virtual void	onChannelsChange ()
	Called whenever the number of Ambisonic channels changes.
int	dim () const
	Get number dimensions.
void	dim (int dim)
	Set the number of dimensions.
int	order () const
	Get order.
void	order (int order)
	Set the order.
const float *	weights () const
	Get Ambisonic channel weights.
int	channels () const
	Returns total number of Ambisonic domain (B-format) channels.

Static Public Member Functions
static int	channelsToUniformOrder (int channels)
static void	encodeWeightsFuMa (float *weights, int dim, int order, float azimuth, float elevation)
static void	encodeWeightsFuMa (float *ws, int dim, int order, float x, float y, float z)
static void	encodeWeightsFuMa16 (float *weights, float azimuth, float elevation)
	Brute force 3rd order. Weights must be of size 16.
static void	encodeWeightsFuMa16 (float *ws, float x, float y, float z)
	(x,y,z unit vector in the listener's coordinate frame)
static int	orderToChannels (int dim, int order)
static int	orderToChannelsH (int orderH)
static int	orderToChannelsV (int orderV)
static int	channelsToOrder (int channels)
static int	channelsToDimensions (int channels)

Protected Member Functions
void	updateChanWeights ()
void	resizeArrays (int numChannels, int numSpeakers)
float	decode (float *encFrame, int encNumChannels, int speakerNum)

Static Protected Member Functions
template<typename T >
static void	resize (T *&a, int n)

Protected Attributes
int	mNumSpeakers
int	mFlavor
float *	mDecodeMatrix
float	mWOrder [5]
Speakers	mSpeakers
int	mDim
int	mOrder
int	mChannels
float *	mWeights

Static Protected Attributes
static float	flavorWeights [4][5][5]

Detailed Description

Higher Order Ambisonic Decoding class

Definition at line 180 of file al_Ambisonics.hpp.

Constructor & Destructor Documentation

AmbiDecode()

al::AmbiDecode::AmbiDecode	(	int	dim,
		int	order,
		int	numSpeakers,
		int	flavor = 1
	)

Parameters

[in]	dim	number of spatial dimensions (2 or 3)
[in]	order	highest spherical harmonic order
[in]	numSpeakers	number of speakers
[in]	flavor	decoding algorithm

Member Function Documentation

decode()

virtual void al::AmbiDecode::decode ( float *  dec, const float *  enc, int  numDecFrames  ) const

virtual

Parameters

[out]	dec	output time domain buffers (non-interleaved)
[in]	enc	input Ambisonic domain buffers (non-interleaved)
[in]	numDecFrames	number of frames in time domain buffers

encodeWeightsFuMa() [1/2]

static void al::AmbiBase::encodeWeightsFuMa ( float *  weights, int  dim, int  order, float  azimuth, float  elevation  )

staticinherited

Compute spherical harmonic weights based on azimuth and elevation azimuth is anti-clockwise; both azimuth and elevation are in degrees

encodeWeightsFuMa() [2/2]

static void al::AmbiBase::encodeWeightsFuMa ( float *  ws, int  dim, int  order, float  x, float  y, float  z  )

staticinherited

Compute spherical harmonic weights based on unit direction vector (in the listener's coordinate frame)

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The documentation for this class was generated from the following file:

• al_Ambisonics.hpp