auditioner.h

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/*
 * Copyright (C) 2005-2006 Taybin Rutkin <taybin@taybin.com>
 * Copyright (C) 2006-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2009-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2014-2018 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_auditioner_h__
#define __ardour_auditioner_h__
 
#include <string>
 
#include <glibmm/threads.h>
 
#include "evoral/PatchChange.h"
 
#include "ardour/ardour.h"
#include "ardour/plugin.h"
#include "ardour/track.h"
 
namespace ARDOUR {
 
class Session;
class AudioRegion;
class AudioPlaylist;
class MidiRegion;
 
class LIBARDOUR_API Auditioner : public Track
{
public:
        Auditioner (Session&);
        ~Auditioner ();
 
        int init ();
        int connect ();
 
        bool auditioning() const;
        void audition_region (std::shared_ptr<Region>, bool loop = false);
        int play_audition (samplecnt_t nframes);
        void cancel_audition ();
 
        void seek_to_sample (sampleoffset_t pos);
        void seek_to_percent (float const pos);
        sampleoffset_t seek_sample() const { return _seeking ? _seek_sample : -1;}
        void seek_response(sampleoffset_t pos);
 
        void idle_synth_update ();
 
        Evoral::PatchChange<MidiBuffer::TimeType> const& patch_change (uint8_t chn) {
                return _patch_change[chn & 0xf];
        }
 
        MonitorState monitoring_state () const;
 
        bool needs_monitor() const { return via_monitor; }
 
        virtual ChanCount input_streams () const;
 
        PBD::Signal2<void, ARDOUR::samplecnt_t, ARDOUR::samplecnt_t> AuditionProgress;
 
        /* Track */
        int roll (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool& need_butler);
        DataType data_type () const;
 
        int roll_audio (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool& need_butler);
        int roll_midi (pframes_t nframes, samplepos_t start_sample, samplepos_t end_sample, bool& need_butler);
 
        /* fake track */
        void set_state_part_two () {}
        int set_state (const XMLNode&, int) { return 0; }
        bool bounceable (std::shared_ptr<Processor>, bool) const { return false; }
        void freeze_me (InterThreadInfo&) {}
        void unfreeze () {}
 
        /* MIDI Track -- listen to Bank/Patch */
        void update_controls (BufferSet const& bufs);
 
        std::shared_ptr<Region> bounce (InterThreadInfo&, std::string const& name) {
                return std::shared_ptr<Region> ();
        }
 
        std::shared_ptr<Region> bounce_range (samplepos_t, samplepos_t, InterThreadInfo&, std::shared_ptr<Processor>, bool, std::string const&, bool) {
                return std::shared_ptr<Region> ();
        }
 
        int export_stuff (BufferSet&, samplepos_t, samplecnt_t, std::shared_ptr<Processor>, bool, bool, bool, MidiNoteTracker&) { return -1; }
 
        void set_audition_synth_info(PluginInfoPtr in);
        PluginInfoPtr get_audition_synth_info() {return audition_synth_info;}
 
        samplecnt_t output_latency () const { return 0; }
 
private:
 
        PluginInfoPtr audition_synth_info;  //we will use this to create a new synth on-the-fly each time an audition is requested
 
        std::shared_ptr<AudioRegion> the_region;
        std::shared_ptr<MidiRegion> midi_region;
        samplepos_t current_sample;
        mutable std::atomic<int> _auditioning;
        Glib::Threads::Mutex lock;
        timecnt_t length;
        sampleoffset_t _seek_sample;
        bool _reload_synth;
        bool _seeking;
        bool _seek_complete;
        bool via_monitor;
        bool _midi_audition;
        bool _queue_panic;
        bool _loop;
 
        std::shared_ptr<Processor> asynth;
 
        Evoral::PatchChange<MidiBuffer::TimeType> _patch_change[16];
 
        PluginInfoPtr lookup_fallback_synth_plugin_info (std::string const&) const;
        void drop_ports ();
        void lookup_fallback_synth ();
        bool load_synth();
        void unload_synth (bool);
        static void*_drop_ports (void*);
        void actually_drop_ports ();
        void output_changed (IOChange, void*);
        timepos_t _import_position;
};
 
}; /* namespace ARDOUR */
 
#endif /* __ardour_auditioner_h__ */