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;
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, framepos_t /*start_frame*/, framepos_t /*end_frame*/, 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;
91 // cerr << "meter " << name() << " runs with " << bufs.available() << " inputs\n";
93 const uint32_t n_audio = min (current_meters.n_audio(), bufs.count().n_audio());
94 const uint32_t n_midi = min (current_meters.n_midi(), bufs.count().n_midi());
98 const float falloff_dB = Config->get_meter_falloff() * nframes / _session.nominal_frame_rate();
99 const uint32_t zoh = _session.nominal_frame_rate() * .021;
102 // Meter MIDI in to the first n_midi peaks
103 for (uint32_t i = 0; i < n_midi; ++i, ++n) {
105 const MidiBuffer& buf (bufs.get_midi(i));
107 for (MidiBuffer::const_iterator e = buf.begin(); e != buf.end(); ++e) {
108 const Evoral::MIDIEvent<framepos_t> ev(*e, false);
109 if (ev.is_note_on()) {
110 const float this_vel = ev.buffer()[2] / 127.0;
111 if (this_vel > val) {
115 if (_combined_peak < 0.01) {
116 _combined_peak = 0.01;
120 val += 1.0 / bufs.get_midi(n).capacity();
126 if (_peak_power[n] < (1.0 / 512.0)) {
129 /* empirical algorithm WRT to audio falloff times */
130 _peak_power[n] -= sqrtf (_peak_power[n]) * falloff_dB * 0.045f;
132 _peak_power[n] = max(_peak_power[n], val);
133 _max_peak_signal[n] = 0;
136 // Meter audio in to the rest of the peaks
137 for (uint32_t i = 0; i < n_audio; ++i, ++n) {
138 if (bufs.get_audio(i).silent()) {
141 _peak_buffer[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_buffer[n]);
142 _max_peak_signal[n] = std::max(_peak_buffer[n], _max_peak_signal[n]); // todo sync reset
143 _combined_peak =std::max(_peak_buffer[n], _combined_peak);
147 _max_peak_signal[n] = 0;
152 _peak_power[n] = -std::numeric_limits<float>::infinity();
155 if (_peak_power[n] > -318.8f) {
156 _peak_power[n] -= falloff_dB;
158 _peak_power[n] = -std::numeric_limits<float>::infinity();
160 _peak_power[n] = max(_peak_power[n], accurate_coefficient_to_dB(_peak_buffer[n]));
161 // integration buffer, retain peaks > 49Hz
167 if (_meter_type & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
168 _kmeter[i]->process(bufs.get_audio(i).data(), nframes);
170 if (_meter_type & (MeterIEC1DIN | MeterIEC1NOR)) {
171 _iec1meter[i]->process(bufs.get_audio(i).data(), nframes);
173 if (_meter_type & (MeterIEC2BBC | MeterIEC2EBU)) {
174 _iec2meter[i]->process(bufs.get_audio(i).data(), nframes);
176 if (_meter_type & MeterVU) {
177 _vumeter[i]->process(bufs.get_audio(i).data(), nframes);
181 // Zero any excess peaks
182 for (uint32_t i = n; i < _peak_power.size(); ++i) {
183 _peak_power[i] = -std::numeric_limits<float>::infinity();
184 _max_peak_signal[n] = 0;
191 _active = _pending_active;
197 if (_active || _pending_active) {
200 for (size_t i = 0; i < _peak_power.size(); ++i) {
201 _peak_power[i] = -std::numeric_limits<float>::infinity();
206 // these are handled async just fine.
207 for (size_t n = 0; n < _kmeter.size(); ++n) {
209 _iec1meter[n]->reset();
210 _iec2meter[n]->reset();
211 _vumeter[n]->reset();
216 PeakMeter::reset_max ()
218 if (_active || _pending_active) {
222 for (size_t i = 0; i < _max_peak_signal.size(); ++i) {
223 _max_peak_signal[i] = 0;
229 PeakMeter::can_support_io_configuration (const ChanCount& in, ChanCount& out)
236 PeakMeter::configure_io (ChanCount in, ChanCount out)
238 if (out != in) { // always 1:1
244 set_max_channels (in);
246 return Processor::configure_io (in, out);
250 PeakMeter::reflect_inputs (const ChanCount& in)
255 // ConfigurationChanged() postponed
259 PeakMeter::emit_configuration_changed () {
260 ConfigurationChanged (current_meters, current_meters); /* EMIT SIGNAL */
264 PeakMeter::set_max_channels (const ChanCount& chn)
266 uint32_t const limit = chn.n_total();
267 const size_t n_audio = chn.n_audio();
269 while (_peak_power.size() > limit) {
270 _peak_buffer.pop_back();
271 _peak_power.pop_back();
272 _max_peak_signal.pop_back();
275 while (_peak_power.size() < limit) {
276 _peak_buffer.push_back(0);
277 _peak_power.push_back(-std::numeric_limits<float>::infinity());
278 _max_peak_signal.push_back(0);
281 assert(_peak_buffer.size() == limit);
282 assert(_peak_power.size() == limit);
283 assert(_max_peak_signal.size() == limit);
285 /* alloc/free other audio-only meter types. */
286 while (_kmeter.size() > n_audio) {
287 delete (_kmeter.back());
288 delete (_iec1meter.back());
289 delete (_iec2meter.back());
290 delete (_vumeter.back());
292 _iec1meter.pop_back();
293 _iec2meter.pop_back();
296 while (_kmeter.size() < n_audio) {
297 _kmeter.push_back(new Kmeterdsp());
298 _iec1meter.push_back(new Iec1ppmdsp());
299 _iec2meter.push_back(new Iec2ppmdsp());
300 _vumeter.push_back(new Vumeterdsp());
302 assert(_kmeter.size() == n_audio);
303 assert(_iec1meter.size() == n_audio);
304 assert(_iec2meter.size() == n_audio);
305 assert(_vumeter.size() == n_audio);
311 /** To be driven by the Meter signal from IO.
312 * Caller MUST hold its own processor_lock to prevent reconfiguration
313 * of meter size during this call.
316 #define CHECKSIZE(MTR) (n < MTR.size() + n_midi && n >= n_midi)
319 PeakMeter::meter_level(uint32_t n, MeterType type) {
327 const uint32_t n_midi = current_meters.n_midi();
328 if (CHECKSIZE(_kmeter)) {
329 return accurate_coefficient_to_dB (_kmeter[n - n_midi]->read());
336 const uint32_t n_midi = current_meters.n_midi();
337 if (CHECKSIZE(_iec1meter)) {
338 return accurate_coefficient_to_dB (_iec1meter[n - n_midi]->read());
345 const uint32_t n_midi = current_meters.n_midi();
346 if (CHECKSIZE(_iec2meter)) {
347 return accurate_coefficient_to_dB (_iec2meter[n - n_midi]->read());
353 const uint32_t n_midi = current_meters.n_midi();
354 if (CHECKSIZE(_vumeter)) {
355 return accurate_coefficient_to_dB (_vumeter[n - n_midi]->read());
361 if (n < _peak_power.size()) {
362 return _peak_power[n];
366 mcptmp = _combined_peak;
368 return accurate_coefficient_to_dB(mcptmp);
374 if (n < _max_peak_signal.size()) {
375 return accurate_coefficient_to_dB(_max_peak_signal[n]);
379 return minus_infinity();
383 PeakMeter::set_type(MeterType t)
385 if (t == _meter_type) {
391 if (t & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
392 const size_t n_audio = current_meters.n_audio();
393 for (size_t n = 0; n < n_audio; ++n) {
397 if (t & (MeterIEC1DIN | MeterIEC1NOR)) {
398 const size_t n_audio = current_meters.n_audio();
399 for (size_t n = 0; n < n_audio; ++n) {
400 _iec1meter[n]->reset();
403 if (t & (MeterIEC2BBC | MeterIEC2EBU)) {
404 const size_t n_audio = current_meters.n_audio();
405 for (size_t n = 0; n < n_audio; ++n) {
406 _iec2meter[n]->reset();
410 const size_t n_audio = current_meters.n_audio();
411 for (size_t n = 0; n < n_audio; ++n) {
412 _vumeter[n]->reset();
420 PeakMeter::state (bool full_state)
422 XMLNode& node (Processor::state (full_state));
423 node.add_property("type", "meter");