diff options
Diffstat (limited to 'libs/ardour/vbap.cc')
| -rw-r--r-- | libs/ardour/vbap.cc | 106 |
1 files changed, 88 insertions, 18 deletions
diff --git a/libs/ardour/vbap.cc b/libs/ardour/vbap.cc index d0114986ce..247df7995a 100644 --- a/libs/ardour/vbap.cc +++ b/libs/ardour/vbap.cc @@ -38,14 +38,24 @@ #include <string> +#include "pbd/cartesian.h" + #include "ardour/vbap.h" +#include "ardour/vbap_speakers.h" +#include "ardour/audio_buffer.h" +#include "ardour/buffer_set.h" +using namespace PBD; using namespace ARDOUR; +using namespace std; VBAPanner::VBAPanner (Panner& parent, Evoral::Parameter param, VBAPSpeakers& s) : StreamPanner (parent, param) + , _dirty (false) , _speakers (s) + { + _speakers.Changed.connect_same_thread (speaker_connection, boost::bind (&VBAPanner::mark_dirty, this)); } VBAPanner::~VBAPanner () @@ -53,21 +63,16 @@ VBAPanner::~VBAPanner () } void -VBAPanner::azi_ele_to_cart (int azi, int ele, double* c) +VBAPanner::mark_dirty () { - static const double atorad = (2.0 * M_PI / 360.0) ; - c[0] = cos (azi * atorad) * cos (ele * atorad); - c[1] = sin (azi * atorad) * cos (ele * atorad); - c[2] = sin (ele * atorad); + _dirty = true; } void VBAPanner::update () { - double g[3]; - int ls[3]; - - compute_gains (g, ls, _azimuth, _elevation); + cart_to_azi_ele (_x, _y, _z, _azimuth, _elevation); + _dirty = true; } void @@ -80,23 +85,33 @@ VBAPanner::compute_gains (double gains[3], int speaker_ids[3], int azi, int ele) double small_g; double big_sm_g, gtmp[3]; - azi_ele_to_cart (azi,ele, cartdir); + azi_ele_to_cart (azi,ele, cartdir[0], cartdir[1], cartdir[2]); big_sm_g = -100000.0; - for (i = 0; i < _speakers.n_tuples(); i++){ + for (i = 0; i < _speakers.n_tuples(); i++) { + small_g = 10000000.0; + for (j = 0; j < _speakers.dimension(); j++) { + gtmp[j]=0.0; - for (k = 0; k < _speakers.dimension(); k++) - gtmp[j]+=cartdir[k]*_speakers.matrix(i)[j*_speakers.dimension()+k]; - if (gtmp[j] < small_g) + + for (k = 0; k < _speakers.dimension(); k++) { + gtmp[j] += cartdir[k] * _speakers.matrix(i)[j*_speakers.dimension()+k]; + } + + if (gtmp[j] < small_g) { small_g = gtmp[j]; + } } if (small_g > big_sm_g) { + big_sm_g = small_g; - gains[0]=gtmp[0]; - gains[1]=gtmp[1]; + + gains[0] = gtmp[0]; + gains[1] = gtmp[1]; + speaker_ids[0]= _speakers.speaker_for_tuple (i, 0); speaker_ids[1]= _speakers.speaker_for_tuple (i, 1); @@ -105,7 +120,7 @@ VBAPanner::compute_gains (double gains[3], int speaker_ids[3], int azi, int ele) speaker_ids[2] = _speakers.speaker_for_tuple (i, 2); } else { gains[2] = 0.0; - speaker_ids[2] = 0; + speaker_ids[2] = -1; } } } @@ -115,9 +130,64 @@ VBAPanner::compute_gains (double gains[3], int speaker_ids[3], int azi, int ele) gains[0] /= power; gains[1] /= power; gains[2] /= power; + + _dirty = false; } void -VBAPanner::do_distribute (AudioBuffer& bufs, BufferSet& obufs, gain_t gain_coefficient, nframes_t nframes) +VBAPanner::do_distribute (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coefficient, nframes_t nframes) { + if (_muted) { + return; + } + + Sample* const src = srcbuf.data(); + Sample* dst; + pan_t pan; + uint32_t n_audio = obufs.count().n_audio(); + bool was_dirty; + + if ((was_dirty = _dirty)) { + compute_gains (desired_gains, desired_outputs, _azimuth, _elevation); + } + + bool todo[n_audio]; + + for (uint32_t o = 0; o < n_audio; ++o) { + todo[o] = true; + } + + /* VBAP may distribute the signal across up to 3 speakers depending on + the configuration of the speakers. + */ + + for (int o = 0; o < 3; ++o) { + if (outputs[o] != -1) { + + nframes_t n = 0; + + /* XXX TODO: interpolate across changes in gain and/or outputs + */ + + dst = obufs.get_audio(outputs[o]).data(); + + pan = gain_coefficient * desired_gains[o]; + mix_buffers_with_gain (dst+n,src+n,nframes-n,pan); + + todo[o] = false; + } + } + + for (uint32_t o = 0; o < n_audio; ++o) { + if (todo[o]) { + /* VBAP decided not to deliver any audio to this output, so we write silence */ + dst = obufs.get_audio(o).data(); + memset (dst, 0, sizeof (Sample) * nframes); + } + } + + if (was_dirty) { + memcpy (gains, desired_gains, sizeof (gains)); + memcpy (outputs, desired_outputs, sizeof (outputs)); + } } |