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.
22 #include "pbd/compose.h"
24 #include "ardour/audio_buffer.h"
25 #include "ardour/buffer_set.h"
26 #include "ardour/dB.h"
27 #include "ardour/meter.h"
28 #include "ardour/midi_buffer.h"
29 #include "ardour/session.h"
30 #include "ardour/rc_configuration.h"
31 #include "ardour/runtime_functions.h"
35 using namespace ARDOUR;
37 PBD::Signal0<void> Metering::Meter;
39 PeakMeter::PeakMeter (Session& s, const std::string& name)
40 : Processor (s, string_compose ("meter-%1", name))
42 Kmeterdsp::init(s.nominal_frame_rate());
45 PeakMeter::~PeakMeter ()
47 while (_kmeter.size() > 0) {
48 delete (_kmeter.back());
54 /** Get peaks from @a bufs
55 * Input acceptance is lenient - the first n buffers from @a bufs will
56 * be metered, where n was set by the last call to setup(), excess meters will
59 * (runs in jack realtime context)
62 PeakMeter::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
64 if (!_active && !_pending_active) {
68 // cerr << "meter " << name() << " runs with " << bufs.available() << " inputs\n";
70 const uint32_t n_audio = min (current_meters.n_audio(), bufs.count().n_audio());
71 const uint32_t n_midi = min (current_meters.n_midi(), bufs.count().n_midi());
75 // Meter MIDI in to the first n_midi peaks
76 for (uint32_t i = 0; i < n_midi; ++i, ++n) {
78 MidiBuffer& buf (bufs.get_midi(i));
80 for (MidiBuffer::iterator e = buf.begin(); e != buf.end(); ++e) {
81 const Evoral::MIDIEvent<framepos_t> ev(*e, false);
82 if (ev.is_note_on()) {
83 const float this_vel = ev.buffer()[2] / 127.0;
88 val += 1.0 / bufs.get_midi(n).capacity();
94 _peak_signal[n] = max (val, _peak_signal[n]);
97 // Meter audio in to the rest of the peaks
98 for (uint32_t i = 0; i < n_audio; ++i, ++n) {
99 _peak_signal[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_signal[n]);
100 if (_meter_type & MeterKrms) {
101 _kmeter[i]->process(bufs.get_audio(i).data(), nframes);
105 // Zero any excess peaks
106 for (uint32_t i = n; i < _peak_signal.size(); ++i) {
107 _peak_signal[i] = 0.0f;
110 _active = _pending_active;
116 for (size_t i = 0; i < _peak_signal.size(); ++i) {
117 _peak_signal[i] = 0.0f;
120 for (size_t n = 0; n < _kmeter.size(); ++n) {
126 PeakMeter::reset_max ()
128 for (size_t i = 0; i < _max_peak_power.size(); ++i) {
129 _max_peak_power[i] = -INFINITY;
130 _max_peak_signal[i] = 0;
135 PeakMeter::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
142 PeakMeter::configure_io (ChanCount in, ChanCount out)
144 if (out != in) { // always 1:1
150 reset_max_channels (in);
152 return Processor::configure_io (in, out);
156 PeakMeter::reflect_inputs (const ChanCount& in)
160 const size_t limit = min (_peak_signal.size(), (size_t) current_meters.n_total ());
161 const size_t n_midi = min (_peak_signal.size(), (size_t) current_meters.n_midi());
162 const size_t n_audio = current_meters.n_audio();
164 for (size_t n = 0; n < limit; ++n) {
166 _visible_peak_power[n] = 0;
168 _visible_peak_power[n] = -INFINITY;
172 for (size_t n = 0; n < n_audio; ++n) {
178 ConfigurationChanged (in, in); /* EMIT SIGNAL */
182 PeakMeter::reset_max_channels (const ChanCount& chn)
184 uint32_t const limit = chn.n_total();
185 const size_t n_audio = chn.n_audio();
187 while (_peak_signal.size() > limit) {
188 _peak_signal.pop_back();
189 _visible_peak_power.pop_back();
190 _max_peak_signal.pop_back();
191 _max_peak_power.pop_back();
194 while (_peak_signal.size() < limit) {
195 _peak_signal.push_back(0);
196 _visible_peak_power.push_back(minus_infinity());
197 _max_peak_signal.push_back(0);
198 _max_peak_power.push_back(minus_infinity());
201 assert(_peak_signal.size() == limit);
202 assert(_visible_peak_power.size() == limit);
203 assert(_max_peak_signal.size() == limit);
204 assert(_max_peak_power.size() == limit);
206 /* alloc/free other audio-only meter types. */
207 while (_kmeter.size() > n_audio) {
208 delete (_kmeter.back());
211 while (_kmeter.size() < n_audio) {
212 _kmeter.push_back(new Kmeterdsp());
214 assert(_kmeter.size() == n_audio);
217 /** To be driven by the Meter signal from IO.
218 * Caller MUST hold its own processor_lock to prevent reconfiguration
219 * of meter size during this call.
229 assert(_visible_peak_power.size() == _peak_signal.size());
231 const size_t limit = min (_peak_signal.size(), (size_t) current_meters.n_total ());
232 const size_t n_midi = min (_peak_signal.size(), (size_t) current_meters.n_midi());
234 for (size_t n = 0; n < limit; ++n) {
236 /* grab peak since last read */
238 float new_peak = _peak_signal[n]; /* XXX we should use atomic exchange from here ... */
239 _peak_signal[n] = 0; /* ... to here */
242 _max_peak_power[n] = -INFINITY; // std::max (new_peak, _max_peak_power[n]); // XXX
243 _max_peak_signal[n] = 0;
244 if (Config->get_meter_falloff() == 0.0f || new_peak > _visible_peak_power[n]) {
247 /* empirical WRT to falloff times , 0.01f ^= 100 Hz update rate */
248 new_peak = _visible_peak_power[n] - sqrt(_visible_peak_power[n] * Config->get_meter_falloff() * 0.01f * 0.0002f);
249 if (new_peak < (1.0 / 512.0)) new_peak = 0;
251 _visible_peak_power[n] = new_peak;
257 /* compute new visible value using falloff */
259 _max_peak_signal[n] = std::max(new_peak, _max_peak_signal[n]);
261 if (new_peak > 0.0) {
262 new_peak = accurate_coefficient_to_dB (new_peak);
264 new_peak = minus_infinity();
267 /* update max peak */
269 _max_peak_power[n] = std::max (new_peak, _max_peak_power[n]);
271 if (Config->get_meter_falloff() == 0.0f || new_peak > _visible_peak_power[n]) {
272 _visible_peak_power[n] = new_peak;
275 new_peak = _visible_peak_power[n] - (Config->get_meter_falloff() * 0.01f);
276 _visible_peak_power[n] = std::max (new_peak, -INFINITY);
282 PeakMeter::meter_level(uint32_t n, MeterType type) {
286 const uint32_t n_midi = current_meters.n_midi();
287 if ((n - n_midi) < _kmeter.size() && (n - n_midi) >= 0) {
289 return fast_coefficient_to_dB (_kmeter[n-n_midi]->read());
291 return accurate_coefficient_to_dB (_kmeter[n-n_midi]->read());
294 return minus_infinity();
297 return peak_power(n);
299 if (n < _max_peak_signal.size()) {
300 return _max_peak_signal[n];
302 return minus_infinity();
306 if (n < _max_peak_power.size()) {
307 return _max_peak_power[n];
309 return minus_infinity();
315 PeakMeter::set_type(MeterType t)
317 if (t == _meter_type) {
324 const size_t n_audio = current_meters.n_audio();
325 for (size_t n = 0; n < n_audio; ++n) {
333 PeakMeter::state (bool full_state)
335 XMLNode& node (Processor::state (full_state));
336 node.add_property("type", "meter");