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_frame_rate());
42 Iec1ppmdsp::init(s.nominal_frame_rate());
43 Iec2ppmdsp::init(s.nominal_frame_rate());
44 Vumeterdsp::init(s.nominal_frame_rate());
45 _pending_active = true;
46 _meter_type = MeterPeak;
51 PeakMeter::~PeakMeter ()
53 while (_kmeter.size() > 0) {
54 delete (_kmeter.back());
55 delete (_iec1meter.back());
56 delete (_iec2meter.back());
57 delete (_vumeter.back());
59 _iec1meter.pop_back();
60 _iec2meter.pop_back();
63 while (_peak_power.size() > 0) {
64 _peak_buffer.pop_back();
65 _peak_power.pop_back();
66 _max_peak_signal.pop_back();
71 /** Get peaks from @a bufs
72 * Input acceptance is lenient - the first n buffers from @a bufs will
73 * be metered, where n was set by the last call to setup(), excess meters will
76 * (runs in jack realtime context)
79 PeakMeter::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
81 if (!_active && !_pending_active) {
84 const bool do_reset_max = _reset_max;
85 const bool do_reset_dpm = _reset_dpm;
89 // cerr << "meter " << name() << " runs with " << bufs.available() << " inputs\n";
91 const uint32_t n_audio = min (current_meters.n_audio(), bufs.count().n_audio());
92 const uint32_t n_midi = min (current_meters.n_midi(), bufs.count().n_midi());
96 const float falloff_dB = Config->get_meter_falloff() * nframes / _session.nominal_frame_rate();
97 const int zoh = _session.nominal_frame_rate() * .021;
100 // Meter MIDI in to the first n_midi peaks
101 for (uint32_t i = 0; i < n_midi; ++i, ++n) {
103 const MidiBuffer& buf (bufs.get_midi(i));
105 for (MidiBuffer::const_iterator e = buf.begin(); e != buf.end(); ++e) {
106 const Evoral::MIDIEvent<framepos_t> ev(*e, false);
107 if (ev.is_note_on()) {
108 const float this_vel = ev.buffer()[2] / 127.0;
109 if (this_vel > val) {
113 val += 1.0 / bufs.get_midi(n).capacity();
119 if (_peak_power[n] < (1.0 / 512.0)) {
122 /* empirical algorithm WRT to audio falloff times */
123 _peak_power[n] -= sqrtf (_peak_power[n]) * falloff_dB * 0.045f;
125 _peak_power[n] = max(_peak_power[n], val);
126 _max_peak_signal[n] = 0;
129 // Meter audio in to the rest of the peaks
130 for (uint32_t i = 0; i < n_audio; ++i, ++n) {
131 if (bufs.get_audio(i).silent()) {
134 _peak_buffer[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_buffer[n]);
135 _max_peak_signal[n] = std::max(_peak_buffer[n], _max_peak_signal[n]); // todo sync reset
139 _max_peak_signal[n] = 0;
144 _peak_power[n] = -std::numeric_limits<float>::infinity();
147 if (_peak_power[n] > -318.8f) {
148 _peak_power[n] -= falloff_dB;
150 _peak_power[n] = -std::numeric_limits<float>::infinity();
152 _peak_power[n] = max(_peak_power[n], accurate_coefficient_to_dB(_peak_buffer[n]));
153 // integration buffer, retain peaks > 49Hz
159 if (_meter_type & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
160 _kmeter[i]->process(bufs.get_audio(i).data(), nframes);
162 if (_meter_type & (MeterIEC1DIN | MeterIEC1NOR)) {
163 _iec1meter[i]->process(bufs.get_audio(i).data(), nframes);
165 if (_meter_type & (MeterIEC2BBC | MeterIEC2EBU)) {
166 _iec2meter[i]->process(bufs.get_audio(i).data(), nframes);
168 if (_meter_type & MeterVU) {
169 _vumeter[i]->process(bufs.get_audio(i).data(), nframes);
173 // Zero any excess peaks
174 for (uint32_t i = n; i < _peak_power.size(); ++i) {
175 _peak_power[i] = -std::numeric_limits<float>::infinity();
176 _max_peak_signal[n] = 0;
183 _active = _pending_active;
189 if (_active || _pending_active) {
192 for (size_t i = 0; i < _peak_power.size(); ++i) {
193 _peak_power[i] = -std::numeric_limits<float>::infinity();
198 // these are handled async just fine.
199 for (size_t n = 0; n < _kmeter.size(); ++n) {
201 _iec1meter[n]->reset();
202 _iec2meter[n]->reset();
203 _vumeter[n]->reset();
208 PeakMeter::reset_max ()
210 if (_active || _pending_active) {
214 for (size_t i = 0; i < _max_peak_signal.size(); ++i) {
215 _max_peak_signal[i] = 0;
221 PeakMeter::can_support_io_configuration (const ChanCount& in, ChanCount& out)
228 PeakMeter::configure_io (ChanCount in, ChanCount out)
230 if (out != in) { // always 1:1
236 set_max_channels (in);
238 return Processor::configure_io (in, out);
242 PeakMeter::reflect_inputs (const ChanCount& in)
247 // ConfigurationChanged() postponed
251 PeakMeter::emit_configuration_changed () {
252 ConfigurationChanged (current_meters, current_meters); /* EMIT SIGNAL */
256 PeakMeter::set_max_channels (const ChanCount& chn)
258 uint32_t const limit = chn.n_total();
259 const size_t n_audio = chn.n_audio();
261 while (_peak_power.size() > limit) {
262 _peak_buffer.pop_back();
263 _peak_power.pop_back();
264 _max_peak_signal.pop_back();
267 while (_peak_power.size() < limit) {
268 _peak_buffer.push_back(0);
269 _peak_power.push_back(-std::numeric_limits<float>::infinity());
270 _max_peak_signal.push_back(0);
273 assert(_peak_buffer.size() == limit);
274 assert(_peak_power.size() == limit);
275 assert(_max_peak_signal.size() == limit);
277 /* alloc/free other audio-only meter types. */
278 while (_kmeter.size() > n_audio) {
279 delete (_kmeter.back());
280 delete (_iec1meter.back());
281 delete (_iec2meter.back());
282 delete (_vumeter.back());
284 _iec1meter.pop_back();
285 _iec2meter.pop_back();
288 while (_kmeter.size() < n_audio) {
289 _kmeter.push_back(new Kmeterdsp());
290 _iec1meter.push_back(new Iec1ppmdsp());
291 _iec2meter.push_back(new Iec2ppmdsp());
292 _vumeter.push_back(new Vumeterdsp());
294 assert(_kmeter.size() == n_audio);
295 assert(_iec1meter.size() == n_audio);
296 assert(_iec2meter.size() == n_audio);
297 assert(_vumeter.size() == n_audio);
303 /** To be driven by the Meter signal from IO.
304 * Caller MUST hold its own processor_lock to prevent reconfiguration
305 * of meter size during this call.
308 #define CHECKSIZE(MTR) (n < MTR.size() + n_midi && n >= n_midi)
311 PeakMeter::meter_level(uint32_t n, MeterType type) {
318 const uint32_t n_midi = current_meters.n_midi();
319 if (CHECKSIZE(_kmeter)) {
320 return accurate_coefficient_to_dB (_kmeter[n - n_midi]->read());
327 const uint32_t n_midi = current_meters.n_midi();
328 if (CHECKSIZE(_iec1meter)) {
329 return accurate_coefficient_to_dB (_iec1meter[n - n_midi]->read());
336 const uint32_t n_midi = current_meters.n_midi();
337 if (CHECKSIZE(_iec2meter)) {
338 return accurate_coefficient_to_dB (_iec2meter[n - n_midi]->read());
344 const uint32_t n_midi = current_meters.n_midi();
345 if (CHECKSIZE(_vumeter)) {
346 return accurate_coefficient_to_dB (_vumeter[n - n_midi]->read());
352 if (n < _peak_power.size()) {
353 return _peak_power[n];
361 if (n < _max_peak_signal.size()) {
362 return accurate_coefficient_to_dB(_max_peak_signal[n]);
366 return minus_infinity();
370 PeakMeter::set_type(MeterType t)
372 if (t == _meter_type) {
378 if (t & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
379 const size_t n_audio = current_meters.n_audio();
380 for (size_t n = 0; n < n_audio; ++n) {
384 if (t & (MeterIEC1DIN | MeterIEC1NOR)) {
385 const size_t n_audio = current_meters.n_audio();
386 for (size_t n = 0; n < n_audio; ++n) {
387 _iec1meter[n]->reset();
390 if (t & (MeterIEC2BBC | MeterIEC2EBU)) {
391 const size_t n_audio = current_meters.n_audio();
392 for (size_t n = 0; n < n_audio; ++n) {
393 _iec2meter[n]->reset();
397 const size_t n_audio = current_meters.n_audio();
398 for (size_t n = 0; n < n_audio; ++n) {
399 _vumeter[n]->reset();
407 PeakMeter::state (bool full_state)
409 XMLNode& node (Processor::state (full_state));
410 node.add_property("type", "meter");