monitor_port.h

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/*
 * Copyright (C) 2021 Robin Gareus <robin@gareus.org>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef _ardour_monitor_port_h_
#define _ardour_monitor_port_h_
 
#include <memory>
#include <set>
 
#include "zita-resampler/vmresampler.h"
 
#include "pbd/rcu.h"
#include <pbd/signals.h>
 
#include "ardour/audio_buffer.h"
#include "ardour/port_engine.h"
 
namespace ARDOUR {
 
class LIBARDOUR_API MonitorPort
{
public:
        MonitorPort (const MonitorPort&) = delete;
        MonitorPort& operator= (const MonitorPort&) = delete;
        ~MonitorPort ();
 
        void set_buffer_size (pframes_t);
        bool silent () const;
        AudioBuffer& get_audio_buffer (pframes_t);
 
        void add_port (std::string const&);
        void remove_port (std::string const&, bool instantly = false);
        bool monitoring (std::string const& = "") const;
        void active_monitors (std::list <std::string>&) const;
        void set_active_monitors (std::list <std::string> const&);
        void clear_ports (bool instantly);
 
        PBD::Signal<void(std::string, bool)> MonitorInputChanged;
 
protected:
        friend class PortManager;
        MonitorPort ();
        void monitor (PortEngine&, pframes_t);
 
private:
        struct MonitorInfo {
                MonitorInfo ()
                {
                        gain = 0;
                        remove = false;
                }
 
                float gain;
                bool  remove;
        };
 
        void collect (std::shared_ptr<MonitorInfo>, Sample*, pframes_t, std::string const&);
        void finalize (pframes_t);
 
        typedef std::map<std::string, std::shared_ptr<MonitorInfo> > MonitorPorts;
        SerializedRCUManager<MonitorPorts> _monitor_ports;
 
        AudioBuffer*            _buffer;
        ArdourZita::VMResampler _src;
        Sample*                 _input;
        Sample*                 _data;
        pframes_t               _insize;
        bool                    _silent;
};
 
}
 
#endif