rta_manager.h

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/*
 * Copyright (C) 2025 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.
 */
#pragma once
 
#include "pbd/ringbuffer.h"
 
#include "ardour/ardour.h"
#include "ardour/dsp_filter.h"
#include "ardour/delivery.h"
#include "ardour/session_handle.h"
#include "ardour/types.h"
 
class RTAManager
        : public ARDOUR::SessionHandlePtr
        , public PBD::ScopedConnectionList
        , public sigc::trackable
{
public:
        static RTAManager* instance ();
        ~RTAManager ();
 
        class RTA : public sigc::trackable
        {
        public:
                RTA (std::shared_ptr<ARDOUR::Route>);
                ~RTA ();
 
                RTA (RTA const&) = delete;
 
                bool init ();
                void reset ();
                bool run ();
 
                void set_rta_speed (ARDOUR::DSP::PerceptualAnalyzer::Speed);
                void set_rta_warp (ARDOUR::DSP::PerceptualAnalyzer::Warp);
 
                using PerceptualAnalyzer = ARDOUR::DSP::PerceptualAnalyzer;
 
                std::shared_ptr<ARDOUR::Route>          route () const;
                std::shared_ptr<ARDOUR::Delivery>       delivery () const;
                std::vector<PerceptualAnalyzer*> const& analyzers () const;
 
        private:
                using RTARingBuffer    = PBD::RingBuffer<ARDOUR::Sample>;
                using RTARingBufferPtr = std::shared_ptr<RTARingBuffer>;
                using RTABufferList    = std::vector<RTARingBufferPtr>;
                using RTABufferListPtr = ARDOUR::Delivery::RTABufferListPtr;
 
                void route_io_changed ();
 
                std::shared_ptr<ARDOUR::Route>   _route;
                std::vector<PerceptualAnalyzer*> _analyzers;
                ARDOUR::samplecnt_t              _rate;
                size_t                           _blocksize;
                size_t                           _stepsize;
                size_t                           _offset;
                RTABufferListPtr                 _ringbuffers;
                PerceptualAnalyzer::Speed        _speed;
                PerceptualAnalyzer::Warp         _warp;
                PBD::ScopedConnectionList        _route_connections;
        };
 
        void set_session (ARDOUR::Session*);
 
        XMLNode& get_state () const;
 
        void attach (std::shared_ptr<ARDOUR::Route>);
        void remove (std::shared_ptr<ARDOUR::Route>);
        bool attached (std::shared_ptr<ARDOUR::Route>) const;
        void clear ();
 
        std::list<RTA> const& rta () const
        {
                return _rta;
        }
 
        void set_active (bool);
        void set_rta_speed (ARDOUR::DSP::PerceptualAnalyzer::Speed);
        void set_rta_warp (ARDOUR::DSP::PerceptualAnalyzer::Warp);
 
        ARDOUR::DSP::PerceptualAnalyzer::Speed rta_speed () const
        {
                return _speed;
        }
        ARDOUR::DSP::PerceptualAnalyzer::Warp rta_warp () const
        {
                return _warp;
        }
 
        PBD::Signal<void ()> SignalReady;
        PBD::Signal<void ()> SettingsChanged;
 
private:
        RTAManager ();
        static RTAManager* _instance;
 
        void run_rta ();
        void session_going_away ();
        void route_removed (std::weak_ptr<ARDOUR::Route>);
        void limit_active_rta ();
        void parameter_changed (std::string);
 
        std::list<RTA>                         _rta;
        bool                                   _active;
        ARDOUR::DSP::PerceptualAnalyzer::Speed _speed;
        ARDOUR::DSP::PerceptualAnalyzer::Warp  _warp;
        bool                                   _clearing;
        sigc::connection _update_connection;
};