1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*############################################################################*/
/*# #*/
/*# Ambisonic C++ Library #*/
/*# CAmbisonicSpeaker - Ambisonic Speaker #*/
/*# Copyright © 2007 Aristotel Digenis #*/
/*# Copyright © 2017 Videolabs #*/
/*# #*/
/*# Filename: AmbisonicSpeaker.cpp #*/
/*# Version: 0.2 #*/
/*# Date: 19/05/2007 #*/
/*# Author(s): Aristotel Digenis, Peter Stitt #*/
/*# Licence: LGPL (+ Proprietary) #*/
/*# #*/
/*############################################################################*/
#include "AmbisonicSpeaker.h"
CAmbisonicSpeaker::CAmbisonicSpeaker()
{ }
CAmbisonicSpeaker::~CAmbisonicSpeaker()
{ }
bool CAmbisonicSpeaker::Configure(unsigned nOrder, bool b3D, unsigned nMisc)
{
bool success = CAmbisonicSource::Configure(nOrder, b3D, nMisc);
if(!success)
return false;
return true;
}
void CAmbisonicSpeaker::Refresh()
{
CAmbisonicSource::Refresh();
}
void CAmbisonicSpeaker::Process(CBFormat* pBFSrc, unsigned nSamples, float* pfDst)
{
unsigned niChannel = 0;
unsigned niSample = 0;
memset(pfDst, 0, nSamples * sizeof(float));
for(niChannel = 0; niChannel < m_nChannelCount; niChannel++)
{
if(m_b3D){ /* Decode to a 3D loudspeaker array */
for(niSample = 0; niSample < nSamples; niSample++)
{
// The spherical harmonic coefficients are multiplied by (2*order + 1) to provide the correct decoder
// for SN3D normalised Ambisonic inputs.
pfDst[niSample] += pBFSrc->m_ppfChannels[niChannel][niSample]
* m_pfCoeff[niChannel] * (2*floor(sqrt(niChannel)) + 1);
}
}
else
{ /* Decode to a 2D loudspeaker array */
for(niSample = 0; niSample < nSamples; niSample++)
{
// The spherical harmonic coefficients are multiplied by 2 to provide the correct decoder
// for SN3D normalised Ambisonic inputs decoded to a horizontal loudspeaker array
pfDst[niSample] += pBFSrc->m_ppfChannels[niChannel][niSample]
* m_pfCoeff[niChannel] * 2.f;
}
}
}
}
|
