/*
- Copyright (C) 2006 Paul Davis
-
+ Copyright (C) 2006 Paul Davis
+
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
-
+
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
-
+
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.
/**
Update the meters.
- The meter signal lock is taken to prevent modification of the
+ The meter signal lock is taken to prevent modification of the
Meter signal while updating the meters, taking the meter signal
- lock prior to taking the io_lock ensures that all IO will remain
+ lock prior to taking the io_lock ensures that all IO will remain
valid while metering.
-*/
+*/
void
Metering::update_meters()
{
* be set to 0.
*/
void
-PeakMeter::run_in_place (BufferSet& bufs, sframes_t start_frame, sframes_t end_frame, nframes_t nframes)
+PeakMeter::run (BufferSet& bufs, sframes_t /*start_frame*/, sframes_t /*end_frame*/, nframes_t nframes)
{
+ if (!_active && !_pending_active) {
+ return;
+ }
+
const uint32_t n_audio = min(_configured_input.n_audio(), bufs.count().n_audio());
const uint32_t n_midi = min(_configured_input.n_midi(), bufs.count().n_midi());
-
+
uint32_t n = 0;
-
+
// Meter MIDI in to the first n_midi peaks
for (uint32_t i = 0; i < n_midi; ++i, ++n) {
float val = 0.0f;
// Meter audio in to the rest of the peaks
for (uint32_t i = 0; i < n_audio; ++i, ++n) {
- _peak_power[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_power[n]);
+ _peak_power[n] = compute_peak (bufs.get_audio(i).data(), nframes, _peak_power[n]);
}
// Zero any excess peaks
for (uint32_t i = n; i < _peak_power.size(); ++i) {
_peak_power[i] = 0.0f;
}
+
+ _active = _pending_active;
+}
+
+PeakMeter::PeakMeter (Session& s, const XMLNode& node)
+ : Processor (s, node)
+{
}
void
if (out != in) { // always 1:1
return false;
}
-
+
uint32_t limit = in.n_total();
-
+
while (_peak_power.size() > limit) {
_peak_power.pop_back();
_visible_peak_power.pop_back();
void
PeakMeter::meter ()
{
+ if (!_active) {
+ return;
+ }
+
assert(_visible_peak_power.size() == _peak_power.size());
const size_t limit = _peak_power.size();
/* grab peak since last read */
- float new_peak = _peak_power[n]; /* XXX we should use atomic exchange from here ... */
+ float new_peak = _peak_power[n]; /* XXX we should use atomic exchange from here ... */
_peak_power[n] = 0; /* ... to here */
-
+
/* compute new visible value using falloff */
if (new_peak > 0.0) {
- new_peak = coefficient_to_dB (new_peak);
+ new_peak = fast_coefficient_to_dB (new_peak);
} else {
new_peak = minus_infinity();
}
-
+
/* update max peak */
-
+
_max_peak_power[n] = std::max (new_peak, _max_peak_power[n]);
-
+
if (Config->get_meter_falloff() == 0.0f || new_peak > _visible_peak_power[n]) {
_visible_peak_power[n] = new_peak;
} else {
return node;
}
+
+bool
+PeakMeter::visible() const
+{
+ return true;
+}