vst_plugin.h

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/*
    Copyright (C) 2010 Paul Davis

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef __ardour_vst_plugin_h__
#define __ardour_vst_plugin_h__

#include "ardour/plugin.h"

struct _AEffect;
typedef struct _AEffect AEffect;
struct _VSTHandle;
typedef struct _VSTHandle VSTHandle;
struct _VSTState;
typedef struct _VSTState VSTState;

namespace ARDOUR {

class LIBARDOUR_API VSTPlugin : public Plugin
{
public:
        VSTPlugin (AudioEngine &, Session &, VSTHandle *);
        virtual ~VSTPlugin ();

        void activate ();
        void deactivate ();

        int set_block_size (pframes_t);
        float default_value (uint32_t port);
        float get_parameter (uint32_t port) const;
        uint32_t nth_parameter (uint32_t port, bool& ok) const;
        void set_parameter (uint32_t port, float val);
        bool load_preset (PresetRecord);
        int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const;
        std::string describe_parameter (Evoral::Parameter);
        framecnt_t signal_latency() const;
        std::set<Evoral::Parameter> automatable() const;

        bool parameter_is_audio (uint32_t) const { return false; }
        bool parameter_is_control (uint32_t) const { return true; }
        bool parameter_is_input (uint32_t) const { return true; }
        bool parameter_is_output (uint32_t) const { return false; }
        
        int connect_and_run (
                BufferSet&, ChanMapping in, ChanMapping out,
                pframes_t nframes, framecnt_t offset
                );

        std::string unique_id () const;
        const char * label () const;
        const char * name () const;
        const char * maker () const;
        uint32_t parameter_count () const;
        void print_parameter (uint32_t, char*, uint32_t len) const;

        bool has_editor () const;
        
        AEffect * plugin () const { return _plugin; }
        VSTState * state () const { return _state; }
        MidiBuffer * midi_buffer () const { return _midi_out_buf; }

        int set_state (XMLNode const &, int);

        int first_user_preset_index () const;
        
protected:
        void set_plugin (AEffect *);
        gchar* get_chunk (bool) const;
        int set_chunk (gchar const *, bool);
        void add_state (XMLNode *) const;
        bool load_user_preset (PresetRecord);
        bool load_plugin_preset (PresetRecord);
        std::string do_save_preset (std::string name);
        void do_remove_preset (std::string name);
        XMLTree * presets_tree () const;
        std::string presets_file () const;
        void find_presets ();
        
        VSTHandle* _handle;
        VSTState*  _state;
        AEffect*   _plugin;

        MidiBuffer* _midi_out_buf;
};

}

#endif