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.
19 #ifndef __ardour_meter_h__
20 #define __ardour_meter_h__
23 #include "ardour/types.h"
24 #include "ardour/processor.h"
25 #include "pbd/signals.h"
26 #include "pbd/fastlog.h"
36 static void update_meters ();
37 static PBD::Signal0<void> Meter;
40 /* this object is not meant to be instantiated */
44 /** Meters peaks on the input and stores them for access.
46 class PeakMeter : public Processor {
48 PeakMeter(Session& s) : Processor(s, "Meter") {}
54 bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const;
55 bool configure_io (ChanCount in, ChanCount out);
57 /* special method for meter, to ensure that it can always handle the maximum
58 number of streams in the route, no matter where we put it.
61 void reset_max_channels (const ChanCount&);
63 /* tell the meter than no matter how many channels it can handle,
64 `in' is the number it is actually going be handling from
68 void reflect_inputs (const ChanCount& in);
71 void run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, bool);
73 ChanCount input_streams () const { return current_meters; }
74 ChanCount output_streams () const { return current_meters; }
76 float peak_power (uint32_t n) {
77 if (n < _visible_peak_power.size()) {
78 return _visible_peak_power[n];
80 return minus_infinity();
84 float max_peak_power (uint32_t n) {
85 if (n < _max_peak_power.size()) {
86 return _max_peak_power[n];
88 return minus_infinity();
92 XMLNode& state (bool full);
97 /** The number of meters that we are currently handling;
98 * may be different to _configured_input and _configured_output
99 * as it can be altered outside a ::configure_io by ::reflect_inputs.
101 ChanCount current_meters;
103 std::vector<float> _peak_power;
104 std::vector<float> _visible_peak_power;
105 std::vector<float> _max_peak_power;
109 } // namespace ARDOUR
111 #endif // __ardour_meter_h__