send.h

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/*
 * Copyright (C) 2006-2009 David Robillard <d@drobilla.net>
 * Copyright (C) 2007-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
 * Copyright (C) 2018 Len Ovens <len@ovenwerks.net>
 *
 * 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.
 */
 
#pragma once
 
#include <string>
 
#include "pbd/stateful.h"
 
#include "ardour/ardour.h"
#include "ardour/delivery.h"
 
namespace ARDOUR {
 
class PeakMeter;
class GainControl;
class DelayLine;
 
class LIBARDOUR_API LatentSend
{
public:
        LatentSend ();
        virtual ~LatentSend() {}
 
        samplecnt_t get_delay_in () const { return _delay_in; }
        samplecnt_t get_delay_out () const { return _delay_out; }
 
        /* should only be called by Route::update_signal_latency */
        virtual void set_delay_in (samplecnt_t) = 0;
 
        /* should only be called by InternalReturn::set_playback_offset
         * (via Route::update_signal_latency)
         */
        virtual void set_delay_out (samplecnt_t, size_t bus = 0) = 0;
        virtual void update_delaylines (bool rt_ok) = 0;
 
        static PBD::Signal<void()> ChangedLatency;
        static PBD::Signal<void()> QueueUpdate;
 
protected:
        samplecnt_t _delay_in;
        samplecnt_t _delay_out;
};
 
class LIBARDOUR_API Send : public Delivery, public LatentSend
{
public:
        Send (Session&, std::shared_ptr<Pannable> pannable, std::shared_ptr<MuteMaster>, Delivery::Role r = Delivery::Send, bool ignore_bitslot = false);
        virtual ~Send ();
 
        bool display_to_user() const;
        bool is_foldback () const { return _role == Foldback; }
 
        std::shared_ptr<PeakMeter> meter() const { return _meter; }
 
        bool metering() const { return _metering; }
        void set_metering (bool yn) { _metering = yn; }
 
        int set_state(const XMLNode&, int version);
 
        PBD::Signal<void()> SelfDestruct;
        void set_remove_on_disconnect (bool b) { _remove_on_disconnect = b; }
        bool remove_on_disconnect () const { return _remove_on_disconnect; }
 
        bool has_panner () const;
        bool panner_linked_to_route () const;
        void set_panner_linked_to_route (bool);
 
        uint32_t pans_required() const { return _configured_input.n_audio(); }
 
        void run (BufferSet& bufs, samplepos_t start_sample, samplepos_t end_sample, double speed, pframes_t nframes, bool);
 
        bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
        bool configure_io (ChanCount in, ChanCount out);
 
        /* latency compensation */
        void set_delay_in (samplecnt_t);
        void set_delay_out (samplecnt_t, size_t bus = 0);
        samplecnt_t get_delay_in () const { return _delay_in; }
        samplecnt_t get_delay_out () const { return _delay_out; }
        samplecnt_t signal_latency () const;
 
        void activate ();
        void deactivate ();
 
        void update_delaylines (bool rt_ok);
 
        bool set_name (const std::string& str);
 
        static std::string name_and_id_new_send (Session&, Delivery::Role r, uint32_t&, bool);
 
protected:
        XMLNode& state () const;
 
        bool _metering;
        std::shared_ptr<PeakMeter> _meter;
        std::shared_ptr<DelayLine> _send_delay;
        std::shared_ptr<DelayLine> _thru_delay;
 
private:
        /* disallow copy construction */
        Send (const Send&);
 
        void panshell_changed ();
        void pannable_changed ();
        void snd_output_changed (IOChange, void*);
 
        int set_state_2X (XMLNode const &, int);
 
        bool _remove_on_disconnect;
};
 
} // namespace ARDOUR