Paul Davis
9e3299f97d
This also removes Route::group_gain_control() and associated machinery. Not yet tested with Mackie or other surfaces. More work to done to start using the group capabilities, and also potentially to add or derive more controls as RouteAutomationControls
494 lines
14 KiB
C++
494 lines
14 KiB
C++
/*
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Copyright (C) 2012 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cmath>
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#include <cstdlib>
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#include <cstdio>
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#include <cstring>
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#include <iostream>
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#include <string>
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#ifdef COMPILER_MSVC
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#include <malloc.h>
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#endif
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#include "pbd/cartesian.h"
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#include "pbd/compose.h"
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#include "ardour/amp.h"
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#include "ardour/audio_buffer.h"
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#include "ardour/buffer_set.h"
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#include "ardour/pan_controllable.h"
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#include "ardour/pannable.h"
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#include "ardour/speakers.h"
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#include "vbap.h"
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#include "vbap_speakers.h"
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#include "i18n.h"
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using namespace PBD;
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using namespace ARDOUR;
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using namespace std;
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static PanPluginDescriptor _descriptor = {
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"VBAP 2D panner",
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"http://ardour.org/plugin/panner_vbap",
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"http://ardour.org/plugin/panner_vbap#ui",
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-1, -1,
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1000,
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VBAPanner::factory
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};
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extern "C" ARDOURPANNER_API PanPluginDescriptor* panner_descriptor () { return &_descriptor; }
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VBAPanner::Signal::Signal (Session&, VBAPanner&, uint32_t, uint32_t n_speakers)
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{
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resize_gains (n_speakers);
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desired_gains[0] = desired_gains[1] = desired_gains[2] = 0;
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outputs[0] = outputs[1] = outputs[2] = -1;
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desired_outputs[0] = desired_outputs[1] = desired_outputs[2] = -1;
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}
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void
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VBAPanner::Signal::resize_gains (uint32_t n)
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{
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gains.assign (n, 0.0);
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}
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VBAPanner::VBAPanner (boost::shared_ptr<Pannable> p, boost::shared_ptr<Speakers> s)
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: Panner (p)
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, _speakers (new VBAPSpeakers (s))
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{
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_pannable->pan_azimuth_control->Changed.connect_same_thread (*this, boost::bind (&VBAPanner::update, this));
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_pannable->pan_elevation_control->Changed.connect_same_thread (*this, boost::bind (&VBAPanner::update, this));
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_pannable->pan_width_control->Changed.connect_same_thread (*this, boost::bind (&VBAPanner::update, this));
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if (!_pannable->has_state()) {
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reset();
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}
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update ();
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}
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VBAPanner::~VBAPanner ()
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{
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clear_signals ();
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}
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void
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VBAPanner::clear_signals ()
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{
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for (vector<Signal*>::iterator i = _signals.begin(); i != _signals.end(); ++i) {
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delete *i;
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}
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_signals.clear ();
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}
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void
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VBAPanner::configure_io (ChanCount in, ChanCount /* ignored - we use Speakers */)
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{
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uint32_t n = in.n_audio();
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clear_signals ();
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for (uint32_t i = 0; i < n; ++i) {
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Signal* s = new Signal (_pannable->session(), *this, i, _speakers->n_speakers());
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_signals.push_back (s);
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}
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update ();
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}
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void
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VBAPanner::update ()
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{
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/* recompute signal directions based on panner azimuth and, if relevant, width (diffusion) and elevation parameters */
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double elevation = _pannable->pan_elevation_control->get_value() * 90.0;
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if (_signals.size() > 1) {
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double w = - (_pannable->pan_width_control->get_value());
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double signal_direction = 1.0 - (_pannable->pan_azimuth_control->get_value() + (w/2));
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double grd_step_per_signal = w / (_signals.size() - 1);
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for (vector<Signal*>::iterator s = _signals.begin(); s != _signals.end(); ++s) {
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Signal* signal = *s;
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int over = signal_direction;
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over -= (signal_direction >= 0) ? 0 : 1;
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signal_direction -= (double)over;
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signal->direction = AngularVector (signal_direction * 360.0, elevation);
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compute_gains (signal->desired_gains, signal->desired_outputs, signal->direction.azi, signal->direction.ele);
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signal_direction += grd_step_per_signal;
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}
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} else if (_signals.size() == 1) {
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double center = (1.0 - _pannable->pan_azimuth_control->get_value()) * 360.0;
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/* width has no role to play if there is only 1 signal: VBAP does not do "diffusion" of a single channel */
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Signal* s = _signals.front();
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s->direction = AngularVector (center, elevation);
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compute_gains (s->desired_gains, s->desired_outputs, s->direction.azi, s->direction.ele);
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}
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SignalPositionChanged(); /* emit */
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}
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void
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VBAPanner::compute_gains (double gains[3], int speaker_ids[3], int azi, int ele)
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{
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/* calculates gain factors using loudspeaker setup and given direction */
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double cartdir[3];
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double power;
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int i,j,k;
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double small_g;
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double big_sm_g, gtmp[3];
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const int dimension = _speakers->dimension();
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assert(dimension == 2 || dimension == 3);
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spherical_to_cartesian (azi, ele, 1.0, cartdir[0], cartdir[1], cartdir[2]);
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big_sm_g = -100000.0;
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gains[0] = gains[1] = gains[2] = 0;
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speaker_ids[0] = speaker_ids[1] = speaker_ids[2] = 0;
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for (i = 0; i < _speakers->n_tuples(); i++) {
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small_g = 10000000.0;
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for (j = 0; j < dimension; j++) {
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gtmp[j] = 0.0;
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for (k = 0; k < dimension; k++) {
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gtmp[j] += cartdir[k] * _speakers->matrix(i)[j * dimension + k];
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}
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if (gtmp[j] < small_g) {
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small_g = gtmp[j];
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}
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}
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if (small_g > big_sm_g) {
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big_sm_g = small_g;
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gains[0] = gtmp[0];
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gains[1] = gtmp[1];
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speaker_ids[0] = _speakers->speaker_for_tuple (i, 0);
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speaker_ids[1] = _speakers->speaker_for_tuple (i, 1);
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if (_speakers->dimension() == 3) {
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gains[2] = gtmp[2];
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speaker_ids[2] = _speakers->speaker_for_tuple (i, 2);
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} else {
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gains[2] = 0.0;
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speaker_ids[2] = -1;
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}
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}
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}
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power = sqrt (gains[0]*gains[0] + gains[1]*gains[1] + gains[2]*gains[2]);
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if (power > 0) {
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gains[0] /= power;
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gains[1] /= power;
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gains[2] /= power;
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}
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}
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void
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VBAPanner::distribute (BufferSet& inbufs, BufferSet& obufs, gain_t gain_coefficient, pframes_t nframes)
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{
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uint32_t n;
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vector<Signal*>::iterator s;
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assert (inbufs.count().n_audio() == _signals.size());
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for (s = _signals.begin(), n = 0; s != _signals.end(); ++s, ++n) {
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Signal* signal (*s);
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distribute_one (inbufs.get_audio (n), obufs, gain_coefficient, nframes, n);
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memcpy (signal->outputs, signal->desired_outputs, sizeof (signal->outputs));
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}
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}
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void
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VBAPanner::distribute_one (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coefficient, pframes_t nframes, uint32_t which)
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{
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Sample* const src = srcbuf.data();
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Signal* signal (_signals[which]);
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/* VBAP may distribute the signal across up to 3 speakers depending on
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the configuration of the speakers.
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But the set of speakers in use "this time" may be different from
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the set of speakers "the last time". So we have up to 6 speakers
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involved, and we have to interpolate so that those no longer
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in use are rapidly faded to silence and those newly in use
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are rapidly faded to their correct level. This prevents clicks
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as we change the set of speakers used to put the signal in
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a given position.
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However, the speakers are represented by output buffers, and other
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speakers may write to the same buffers, so we cannot use
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anything here that will simply assign new (sample) values
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to the output buffers - everything must be done via mixing
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functions and not assignment/copying.
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*/
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vector<double>::size_type sz = signal->gains.size();
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assert (sz == obufs.count().n_audio());
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int8_t *outputs = (int8_t*)alloca(sz); // on the stack, no malloc
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/* set initial state of each output "record"
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*/
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for (uint32_t o = 0; o < sz; ++o) {
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outputs[o] = 0;
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}
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/* for all outputs used this time and last time,
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change the output record to show what has
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happened.
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*/
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for (int o = 0; o < 3; ++o) {
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if (signal->outputs[o] != -1) {
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/* used last time */
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outputs[signal->outputs[o]] |= 1;
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}
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if (signal->desired_outputs[o] != -1) {
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/* used this time */
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outputs[signal->desired_outputs[o]] |= 1<<1;
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}
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}
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/* at this point, we can test a speaker's status:
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(*outputs[o] & 1) <= in use before
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(*outputs[o] & 2) <= in use this time
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(*outputs[o] & 3) == 3 <= in use both times
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*outputs[o] == 0 <= not in use either time
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*/
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for (int o = 0; o < 3; ++o) {
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pan_t pan;
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int output = signal->desired_outputs[o];
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if (output == -1) {
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continue;
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}
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pan = gain_coefficient * signal->desired_gains[o];
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if (pan == 0.0 && signal->gains[output] == 0.0) {
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/* nothing deing delivered to this output */
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signal->gains[output] = 0.0;
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} else if (fabs (pan - signal->gains[output]) > 0.00001) {
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/* signal to this output but the gain coefficient has changed, so
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interpolate between them.
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*/
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AudioBuffer& buf (obufs.get_audio (output));
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buf.accumulate_with_ramped_gain_from (srcbuf.data(), nframes, signal->gains[output], pan, 0);
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signal->gains[output] = pan;
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} else {
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/* signal to this output, same gain as before so just copy with gain
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*/
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mix_buffers_with_gain (obufs.get_audio (output).data(),src,nframes,pan);
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signal->gains[output] = pan;
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}
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}
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/* clean up the outputs that were used last time but not this time
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*/
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for (uint32_t o = 0; o < sz; ++o) {
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if (outputs[o] == 1) {
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/* take signal and deliver with a rapid fade out
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*/
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AudioBuffer& buf (obufs.get_audio (o));
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buf.accumulate_with_ramped_gain_from (srcbuf.data(), nframes, signal->gains[o], 0.0, 0);
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signal->gains[o] = 0.0;
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}
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}
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/* note that the output buffers were all silenced at some point
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so anything we didn't write to with this signal (or any others)
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is just as it should be.
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*/
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}
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void
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VBAPanner::distribute_one_automated (AudioBuffer& /*src*/, BufferSet& /*obufs*/,
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framepos_t /*start*/, framepos_t /*end*/,
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pframes_t /*nframes*/, pan_t** /*buffers*/, uint32_t /*which*/)
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{
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/* XXX to be implemented */
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}
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XMLNode&
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VBAPanner::get_state ()
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{
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XMLNode& node (Panner::get_state());
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node.add_property (X_("uri"), _descriptor.panner_uri);
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/* this is needed to allow new sessions to load with old Ardour: */
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node.add_property (X_("type"), _descriptor.name);
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return node;
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}
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Panner*
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VBAPanner::factory (boost::shared_ptr<Pannable> p, boost::shared_ptr<Speakers> s)
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{
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return new VBAPanner (p, s);
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}
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ChanCount
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VBAPanner::in() const
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{
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return ChanCount (DataType::AUDIO, _signals.size());
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}
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ChanCount
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VBAPanner::out() const
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{
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return ChanCount (DataType::AUDIO, _speakers->n_speakers());
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}
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std::set<Evoral::Parameter>
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VBAPanner::what_can_be_automated() const
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{
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set<Evoral::Parameter> s;
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s.insert (Evoral::Parameter (PanAzimuthAutomation));
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if (_signals.size() > 1) {
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s.insert (Evoral::Parameter (PanWidthAutomation));
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}
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if (_speakers->dimension() == 3) {
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s.insert (Evoral::Parameter (PanElevationAutomation));
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}
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return s;
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}
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string
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VBAPanner::describe_parameter (Evoral::Parameter p)
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{
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switch (p.type()) {
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case PanAzimuthAutomation:
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return _("Azimuth");
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case PanWidthAutomation:
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return _("Width");
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case PanElevationAutomation:
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return _("Elevation");
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default:
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return _pannable->describe_parameter (p);
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}
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}
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string
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VBAPanner::value_as_string (boost::shared_ptr<AutomationControl> ac) const
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{
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/* DO NOT USE LocaleGuard HERE */
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double val = ac->get_value();
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switch (ac->parameter().type()) {
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case PanAzimuthAutomation: /* direction */
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return string_compose (_("%1\u00B0"), (int (rint (val * 360.0))+180)%360);
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case PanWidthAutomation: /* diffusion */
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return string_compose (_("%1%%"), (int) floor (100.0 * fabs(val)));
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case PanElevationAutomation: /* elevation */
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return string_compose (_("%1\u00B0"), (int) floor (90.0 * fabs(val)));
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default:
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return _("unused");
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}
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}
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AngularVector
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VBAPanner::signal_position (uint32_t n) const
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{
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if (n < _signals.size()) {
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return _signals[n]->direction;
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}
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return AngularVector();
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}
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boost::shared_ptr<Speakers>
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VBAPanner::get_speakers () const
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{
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return _speakers->parent();
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}
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void
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VBAPanner::set_position (double p)
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{
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/* map into 0..1 range */
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int over = p;
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over -= (p >= 0) ? 0 : 1;
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p -= (double)over;
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_pannable->pan_azimuth_control->set_value (p, Controllable::NoGroup);
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}
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void
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VBAPanner::set_width (double w)
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{
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_pannable->pan_width_control->set_value (min (1.0, max (-1.0, w)), Controllable::NoGroup);
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}
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void
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VBAPanner::set_elevation (double e)
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{
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_pannable->pan_elevation_control->set_value (min (1.0, max (0.0, e)), Controllable::NoGroup);
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}
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void
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VBAPanner::reset ()
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{
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set_position (.5);
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if (_signals.size() > 1) {
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set_width (1.0 - (1.0 / (double)_signals.size()));
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} else {
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set_width (1.0);
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}
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set_elevation (0);
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update ();
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}
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