2 Copyright (C) 2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify it
5 under the terms of the GNU General Public License as published by the Free
6 Software Foundation; either version 2 of the License, or (at your option)
9 This program is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 You should have received a copy of the GNU General Public License along
15 with this program; if not, write to the Free Software Foundation, Inc.,
16 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "pbd/compose.h"
25 #include "ardour/audio_buffer.h"
26 #include "ardour/buffer_set.h"
27 #include "ardour/dB.h"
28 #include "ardour/meter.h"
29 #include "ardour/midi_buffer.h"
30 #include "ardour/session.h"
31 #include "ardour/rc_configuration.h"
32 #include "ardour/runtime_functions.h"
36 using namespace ARDOUR;
38 PeakMeter::PeakMeter (Session& s, const std::string& name)
39 : Processor (s, string_compose ("meter-%1", name))
41 Kmeterdsp::init(s.nominal_sample_rate());
42 Iec1ppmdsp::init(s.nominal_sample_rate());
43 Iec2ppmdsp::init(s.nominal_sample_rate());
44 Vumeterdsp::init(s.nominal_sample_rate());
45 _pending_active = true;
46 _meter_type = MeterPeak;
53 PeakMeter::~PeakMeter ()
55 while (_kmeter.size() > 0) {
56 delete (_kmeter.back());
57 delete (_iec1meter.back());
58 delete (_iec2meter.back());
59 delete (_vumeter.back());
61 _iec1meter.pop_back();
62 _iec2meter.pop_back();
65 while (_peak_power.size() > 0) {
66 _peak_buffer.pop_back();
67 _peak_power.pop_back();
68 _max_peak_signal.pop_back();
73 /** Get peaks from @a bufs
74 * Input acceptance is lenient - the first n buffers from @a bufs will
75 * be metered, where n was set by the last call to setup(), excess meters will
78 * (runs in jack realtime context)
81 PeakMeter::run (BufferSet& bufs, samplepos_t /*start_sample*/, samplepos_t /*end_sample*/, double /*speed*/, pframes_t nframes, bool)
83 if (!_active && !_pending_active) {
86 const bool do_reset_max = _reset_max;
87 const bool do_reset_dpm = _reset_dpm;
92 // cerr << "meter " << name() << " runs with " << bufs.available() << " inputs\n";
94 const uint32_t n_audio = min (current_meters.n_audio(), bufs.count().n_audio());
95 const uint32_t n_midi = min (current_meters.n_midi(), bufs.count().n_midi());
99 const float falloff_dB = Config->get_meter_falloff() * nframes / _session.nominal_sample_rate();
100 const uint32_t zoh = _session.nominal_sample_rate() * .021;
103 // Meter MIDI in to the first n_midi peaks
104 for (uint32_t i = 0; i < n_midi; ++i, ++n) {
109 const MidiBuffer& buf (bufs.get_midi(i));
111 for (MidiBuffer::const_iterator e = buf.begin(); e != buf.end(); ++e) {
112 const Evoral::Event<samplepos_t> ev(*e, false);
113 if (ev.is_note_on()) {
114 const float this_vel = ev.buffer()[2] / 127.0;
115 if (this_vel > val) {
119 if (_combined_peak < 0.01) {
120 _combined_peak = 0.01;
124 val += 1.0 / bufs.get_midi(n).capacity();
130 if (_peak_power[n] < (1.0 / 512.0)) {
133 /* empirical algorithm WRT to audio falloff times */
134 _peak_power[n] -= sqrtf (_peak_power[n]) * falloff_dB * 0.045f;
136 _peak_power[n] = max(_peak_power[n], val);
137 _max_peak_signal[n] = 0;
140 // Meter audio in to the rest of the peaks
141 for (uint32_t i = 0; i < n_audio; ++i, ++n) {
142 if (bufs.get_audio(i).silent()) {
145 _peak_buffer[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_buffer[n]);
146 _peak_buffer[n] = std::min (_peak_buffer[n], 100.f); // cut off at +40dBFS for falloff.
147 _max_peak_signal[n] = std::max(_peak_buffer[n], _max_peak_signal[n]); // todo sync reset
148 _combined_peak = std::max(_peak_buffer[n], _combined_peak);
152 _max_peak_signal[n] = 0;
157 _peak_power[n] = -std::numeric_limits<float>::infinity();
160 if (_peak_power[n] > -318.8f) {
161 _peak_power[n] -= falloff_dB;
163 _peak_power[n] = -std::numeric_limits<float>::infinity();
165 _peak_power[n] = max(_peak_power[n], accurate_coefficient_to_dB(_peak_buffer[n]));
166 // integration buffer, retain peaks > 49Hz
172 if (_meter_type & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
173 _kmeter[i]->process(bufs.get_audio(i).data(), nframes);
175 if (_meter_type & (MeterIEC1DIN | MeterIEC1NOR)) {
176 _iec1meter[i]->process(bufs.get_audio(i).data(), nframes);
178 if (_meter_type & (MeterIEC2BBC | MeterIEC2EBU)) {
179 _iec2meter[i]->process(bufs.get_audio(i).data(), nframes);
181 if (_meter_type & MeterVU) {
182 _vumeter[i]->process(bufs.get_audio(i).data(), nframes);
186 // Zero any excess peaks
187 for (uint32_t i = n; i < _peak_power.size(); ++i) {
188 _peak_power[i] = -std::numeric_limits<float>::infinity();
189 _max_peak_signal[n] = 0;
196 _active = _pending_active;
202 if (_active || _pending_active) {
205 for (size_t i = 0; i < _peak_power.size(); ++i) {
206 _peak_power[i] = -std::numeric_limits<float>::infinity();
209 const uint32_t n_midi = min (current_meters.n_midi(), (uint32_t)_peak_power.size());
210 for (size_t i = 0; i < n_midi; ++i) {
215 // these are handled async just fine.
216 for (size_t n = 0; n < _kmeter.size(); ++n) {
218 _iec1meter[n]->reset();
219 _iec2meter[n]->reset();
220 _vumeter[n]->reset();
225 PeakMeter::reset_max ()
227 if (_active || _pending_active) {
231 for (size_t i = 0; i < _max_peak_signal.size(); ++i) {
232 _max_peak_signal[i] = 0;
238 PeakMeter::can_support_io_configuration (const ChanCount& in, ChanCount& out)
245 PeakMeter::configure_io (ChanCount in, ChanCount out)
247 bool changed = false;
248 if (out != in) { // always 1:1
252 if (current_meters != in) {
258 set_max_channels (in);
264 return Processor::configure_io (in, out);
268 PeakMeter::reflect_inputs (const ChanCount& in)
273 // ConfigurationChanged() postponed
277 PeakMeter::emit_configuration_changed () {
278 ConfigurationChanged (current_meters, current_meters); /* EMIT SIGNAL */
282 PeakMeter::set_max_channels (const ChanCount& chn)
284 uint32_t const limit = chn.n_total();
285 const size_t n_audio = chn.n_audio();
287 while (_peak_power.size() > limit) {
288 _peak_buffer.pop_back();
289 _peak_power.pop_back();
290 _max_peak_signal.pop_back();
293 while (_peak_power.size() < limit) {
294 _peak_buffer.push_back(0);
295 if (_peak_power.size() < current_meters.n_midi()) {
296 _peak_power.push_back(0);
298 _peak_power.push_back(-std::numeric_limits<float>::infinity());
300 _max_peak_signal.push_back(0);
303 assert(_peak_buffer.size() == limit);
304 assert(_peak_power.size() == limit);
305 assert(_max_peak_signal.size() == limit);
307 /* alloc/free other audio-only meter types. */
308 while (_kmeter.size() > n_audio) {
309 delete (_kmeter.back());
310 delete (_iec1meter.back());
311 delete (_iec2meter.back());
312 delete (_vumeter.back());
314 _iec1meter.pop_back();
315 _iec2meter.pop_back();
318 while (_kmeter.size() < n_audio) {
319 _kmeter.push_back(new Kmeterdsp());
320 _iec1meter.push_back(new Iec1ppmdsp());
321 _iec2meter.push_back(new Iec2ppmdsp());
322 _vumeter.push_back(new Vumeterdsp());
324 assert(_kmeter.size() == n_audio);
325 assert(_iec1meter.size() == n_audio);
326 assert(_iec2meter.size() == n_audio);
327 assert(_vumeter.size() == n_audio);
333 /** To be driven by the Meter signal from IO.
334 * Caller MUST hold its own processor_lock to prevent reconfiguration
335 * of meter size during this call.
338 #define CHECKSIZE(MTR) (n < MTR.size() + n_midi && n >= n_midi)
341 PeakMeter::meter_level(uint32_t n, MeterType type) {
349 const uint32_t n_midi = current_meters.n_midi();
350 if (CHECKSIZE(_kmeter)) {
351 return accurate_coefficient_to_dB (_kmeter[n - n_midi]->read());
358 const uint32_t n_midi = current_meters.n_midi();
359 if (CHECKSIZE(_iec1meter)) {
360 return accurate_coefficient_to_dB (_iec1meter[n - n_midi]->read());
367 const uint32_t n_midi = current_meters.n_midi();
368 if (CHECKSIZE(_iec2meter)) {
369 return accurate_coefficient_to_dB (_iec2meter[n - n_midi]->read());
375 const uint32_t n_midi = current_meters.n_midi();
376 if (CHECKSIZE(_vumeter)) {
377 return accurate_coefficient_to_dB (_vumeter[n - n_midi]->read());
383 if (n < _peak_power.size()) {
384 return _peak_power[n];
388 mcptmp = _combined_peak;
389 return accurate_coefficient_to_dB(mcptmp);
395 if (n < _max_peak_signal.size()) {
396 return accurate_coefficient_to_dB(_max_peak_signal[n]);
400 return minus_infinity();
404 PeakMeter::set_type(MeterType t)
406 if (t == _meter_type) {
412 if (t & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
413 const size_t n_audio = current_meters.n_audio();
414 for (size_t n = 0; n < n_audio; ++n) {
418 if (t & (MeterIEC1DIN | MeterIEC1NOR)) {
419 const size_t n_audio = current_meters.n_audio();
420 for (size_t n = 0; n < n_audio; ++n) {
421 _iec1meter[n]->reset();
424 if (t & (MeterIEC2BBC | MeterIEC2EBU)) {
425 const size_t n_audio = current_meters.n_audio();
426 for (size_t n = 0; n < n_audio; ++n) {
427 _iec2meter[n]->reset();
431 const size_t n_audio = current_meters.n_audio();
432 for (size_t n = 0; n < n_audio; ++n) {
433 _vumeter[n]->reset();
443 XMLNode& node (Processor::state ());
444 node.set_property("type", "meter");