426 lines
10 KiB
C++
426 lines
10 KiB
C++
/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <algorithm>
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#include <cmath>
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#include <limits>
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#include "pbd/compose.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/dB.h"
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#include "ardour/meter.h"
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#include "ardour/midi_buffer.h"
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#include "ardour/session.h"
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#include "ardour/rc_configuration.h"
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#include "ardour/runtime_functions.h"
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using namespace std;
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using namespace ARDOUR;
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PeakMeter::PeakMeter (Session& s, const std::string& name)
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: Processor (s, string_compose ("meter-%1", name))
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{
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Kmeterdsp::init(s.nominal_frame_rate());
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Iec1ppmdsp::init(s.nominal_frame_rate());
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Iec2ppmdsp::init(s.nominal_frame_rate());
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Vumeterdsp::init(s.nominal_frame_rate());
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_pending_active = true;
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_meter_type = MeterPeak;
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_reset_dpm = true;
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_reset_max = true;
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_bufcnt = 0;
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_combined_peak = 0;
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}
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PeakMeter::~PeakMeter ()
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{
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while (_kmeter.size() > 0) {
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delete (_kmeter.back());
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delete (_iec1meter.back());
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delete (_iec2meter.back());
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delete (_vumeter.back());
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_kmeter.pop_back();
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_iec1meter.pop_back();
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_iec2meter.pop_back();
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_vumeter.pop_back();
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}
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while (_peak_power.size() > 0) {
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_peak_buffer.pop_back();
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_peak_power.pop_back();
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_max_peak_signal.pop_back();
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}
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}
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/** Get peaks from @a bufs
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* Input acceptance is lenient - the first n buffers from @a bufs will
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* be metered, where n was set by the last call to setup(), excess meters will
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* be set to 0.
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*
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* (runs in jack realtime context)
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*/
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void
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PeakMeter::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, pframes_t nframes, bool)
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{
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if (!_active && !_pending_active) {
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return;
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}
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const bool do_reset_max = _reset_max;
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const bool do_reset_dpm = _reset_dpm;
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_reset_max = false;
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_reset_dpm = false;
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// cerr << "meter " << name() << " runs with " << bufs.available() << " inputs\n";
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const uint32_t n_audio = min (current_meters.n_audio(), bufs.count().n_audio());
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const uint32_t n_midi = min (current_meters.n_midi(), bufs.count().n_midi());
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uint32_t n = 0;
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const float falloff_dB = Config->get_meter_falloff() * nframes / _session.nominal_frame_rate();
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const uint32_t zoh = _session.nominal_frame_rate() * .021;
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_bufcnt += nframes;
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// Meter MIDI in to the first n_midi peaks
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for (uint32_t i = 0; i < n_midi; ++i, ++n) {
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float val = 0.0f;
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const MidiBuffer& buf (bufs.get_midi(i));
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for (MidiBuffer::const_iterator e = buf.begin(); e != buf.end(); ++e) {
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const Evoral::MIDIEvent<framepos_t> ev(*e, false);
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if (ev.is_note_on()) {
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const float this_vel = ev.buffer()[2] / 127.0;
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if (this_vel > val) {
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val = this_vel;
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}
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if (val > 0.01) {
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if (_combined_peak < 0.01) {
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_combined_peak = 0.01;
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}
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}
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} else {
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val += 1.0 / bufs.get_midi(n).capacity();
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if (val > 1.0) {
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val = 1.0;
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}
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}
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}
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if (_peak_power[n] < (1.0 / 512.0)) {
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_peak_power[n] = 0;
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} else {
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/* empirical algorithm WRT to audio falloff times */
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_peak_power[n] -= sqrtf (_peak_power[n]) * falloff_dB * 0.045f;
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}
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_peak_power[n] = max(_peak_power[n], val);
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_max_peak_signal[n] = 0;
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}
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// Meter audio in to the rest of the peaks
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for (uint32_t i = 0; i < n_audio; ++i, ++n) {
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if (bufs.get_audio(i).silent()) {
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;
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} else {
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_peak_buffer[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_buffer[n]);
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_max_peak_signal[n] = std::max(_peak_buffer[n], _max_peak_signal[n]); // todo sync reset
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_combined_peak =std::max(_peak_buffer[n], _combined_peak);
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}
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if (do_reset_max) {
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_max_peak_signal[n] = 0;
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}
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if (do_reset_dpm) {
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_peak_buffer[n] = 0;
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_peak_power[n] = -std::numeric_limits<float>::infinity();
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} else {
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// falloff
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if (_peak_power[n] > -318.8f) {
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_peak_power[n] -= falloff_dB;
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} else {
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_peak_power[n] = -std::numeric_limits<float>::infinity();
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}
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_peak_power[n] = max(_peak_power[n], accurate_coefficient_to_dB(_peak_buffer[n]));
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// integration buffer, retain peaks > 49Hz
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if (_bufcnt > zoh) {
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_peak_buffer[n] = 0;
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}
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}
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if (_meter_type & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
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_kmeter[i]->process(bufs.get_audio(i).data(), nframes);
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}
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if (_meter_type & (MeterIEC1DIN | MeterIEC1NOR)) {
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_iec1meter[i]->process(bufs.get_audio(i).data(), nframes);
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}
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if (_meter_type & (MeterIEC2BBC | MeterIEC2EBU)) {
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_iec2meter[i]->process(bufs.get_audio(i).data(), nframes);
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}
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if (_meter_type & MeterVU) {
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_vumeter[i]->process(bufs.get_audio(i).data(), nframes);
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}
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}
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// Zero any excess peaks
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for (uint32_t i = n; i < _peak_power.size(); ++i) {
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_peak_power[i] = -std::numeric_limits<float>::infinity();
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_max_peak_signal[n] = 0;
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}
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if (_bufcnt > zoh) {
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_bufcnt = 0;
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}
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_active = _pending_active;
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}
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void
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PeakMeter::reset ()
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{
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if (_active || _pending_active) {
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_reset_dpm = true;
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} else {
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for (size_t i = 0; i < _peak_power.size(); ++i) {
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_peak_power[i] = -std::numeric_limits<float>::infinity();
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_peak_buffer[i] = 0;
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}
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}
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// these are handled async just fine.
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for (size_t n = 0; n < _kmeter.size(); ++n) {
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_kmeter[n]->reset();
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_iec1meter[n]->reset();
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_iec2meter[n]->reset();
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_vumeter[n]->reset();
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}
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}
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void
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PeakMeter::reset_max ()
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{
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if (_active || _pending_active) {
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_reset_max = true;
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return;
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}
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for (size_t i = 0; i < _max_peak_signal.size(); ++i) {
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_max_peak_signal[i] = 0;
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_peak_buffer[i] = 0;
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}
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}
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bool
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PeakMeter::can_support_io_configuration (const ChanCount& in, ChanCount& out)
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{
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out = in;
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return true;
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}
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bool
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PeakMeter::configure_io (ChanCount in, ChanCount out)
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{
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if (out != in) { // always 1:1
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return false;
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}
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current_meters = in;
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set_max_channels (in);
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return Processor::configure_io (in, out);
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}
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void
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PeakMeter::reflect_inputs (const ChanCount& in)
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{
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reset();
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current_meters = in;
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reset_max();
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// ConfigurationChanged() postponed
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}
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void
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PeakMeter::emit_configuration_changed () {
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ConfigurationChanged (current_meters, current_meters); /* EMIT SIGNAL */
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}
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void
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PeakMeter::set_max_channels (const ChanCount& chn)
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{
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uint32_t const limit = chn.n_total();
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const size_t n_audio = chn.n_audio();
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while (_peak_power.size() > limit) {
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_peak_buffer.pop_back();
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_peak_power.pop_back();
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_max_peak_signal.pop_back();
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}
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while (_peak_power.size() < limit) {
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_peak_buffer.push_back(0);
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_peak_power.push_back(-std::numeric_limits<float>::infinity());
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_max_peak_signal.push_back(0);
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}
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assert(_peak_buffer.size() == limit);
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assert(_peak_power.size() == limit);
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assert(_max_peak_signal.size() == limit);
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/* alloc/free other audio-only meter types. */
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while (_kmeter.size() > n_audio) {
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delete (_kmeter.back());
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delete (_iec1meter.back());
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delete (_iec2meter.back());
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delete (_vumeter.back());
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_kmeter.pop_back();
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_iec1meter.pop_back();
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_iec2meter.pop_back();
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_vumeter.pop_back();
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}
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while (_kmeter.size() < n_audio) {
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_kmeter.push_back(new Kmeterdsp());
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_iec1meter.push_back(new Iec1ppmdsp());
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_iec2meter.push_back(new Iec2ppmdsp());
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_vumeter.push_back(new Vumeterdsp());
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}
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assert(_kmeter.size() == n_audio);
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assert(_iec1meter.size() == n_audio);
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assert(_iec2meter.size() == n_audio);
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assert(_vumeter.size() == n_audio);
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reset();
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reset_max();
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}
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/** To be driven by the Meter signal from IO.
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* Caller MUST hold its own processor_lock to prevent reconfiguration
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* of meter size during this call.
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*/
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#define CHECKSIZE(MTR) (n < MTR.size() + n_midi && n >= n_midi)
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float
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PeakMeter::meter_level(uint32_t n, MeterType type) {
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float mcptmp;
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switch (type) {
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case MeterKrms:
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case MeterK20:
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case MeterK14:
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case MeterK12:
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{
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const uint32_t n_midi = current_meters.n_midi();
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if (CHECKSIZE(_kmeter)) {
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return accurate_coefficient_to_dB (_kmeter[n - n_midi]->read());
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}
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}
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break;
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case MeterIEC1DIN:
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case MeterIEC1NOR:
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{
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const uint32_t n_midi = current_meters.n_midi();
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if (CHECKSIZE(_iec1meter)) {
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return accurate_coefficient_to_dB (_iec1meter[n - n_midi]->read());
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}
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}
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break;
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case MeterIEC2BBC:
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case MeterIEC2EBU:
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{
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const uint32_t n_midi = current_meters.n_midi();
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if (CHECKSIZE(_iec2meter)) {
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return accurate_coefficient_to_dB (_iec2meter[n - n_midi]->read());
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}
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}
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break;
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case MeterVU:
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{
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const uint32_t n_midi = current_meters.n_midi();
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if (CHECKSIZE(_vumeter)) {
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return accurate_coefficient_to_dB (_vumeter[n - n_midi]->read());
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}
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}
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break;
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case MeterPeak:
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case MeterPeak0dB:
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if (n < _peak_power.size()) {
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return _peak_power[n];
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}
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break;
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case MeterMCP:
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mcptmp = _combined_peak;
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_combined_peak = 0;
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return accurate_coefficient_to_dB(mcptmp);
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case MeterMaxSignal:
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assert(0);
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break;
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default:
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case MeterMaxPeak:
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if (n < _max_peak_signal.size()) {
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return accurate_coefficient_to_dB(_max_peak_signal[n]);
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}
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break;
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}
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return minus_infinity();
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}
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void
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PeakMeter::set_type(MeterType t)
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{
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if (t == _meter_type) {
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return;
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}
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_meter_type = t;
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if (t & (MeterKrms | MeterK20 | MeterK14 | MeterK12)) {
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const size_t n_audio = current_meters.n_audio();
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for (size_t n = 0; n < n_audio; ++n) {
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_kmeter[n]->reset();
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}
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}
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if (t & (MeterIEC1DIN | MeterIEC1NOR)) {
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const size_t n_audio = current_meters.n_audio();
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for (size_t n = 0; n < n_audio; ++n) {
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_iec1meter[n]->reset();
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}
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}
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if (t & (MeterIEC2BBC | MeterIEC2EBU)) {
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const size_t n_audio = current_meters.n_audio();
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for (size_t n = 0; n < n_audio; ++n) {
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_iec2meter[n]->reset();
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}
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}
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if (t & MeterVU) {
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const size_t n_audio = current_meters.n_audio();
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for (size_t n = 0; n < n_audio; ++n) {
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_vumeter[n]->reset();
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}
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}
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TypeChanged(t);
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}
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XMLNode&
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PeakMeter::state (bool full_state)
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{
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XMLNode& node (Processor::state (full_state));
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node.add_property("type", "meter");
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return node;
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}
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