/*
  silence.cpp  -  LV2 Toolkit API Demonstration Plugin

  Copyright (C) 2012  Michael Fisher <mfisher31@gmail.com>

  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.

*/
/**
 * @file silence.cpp
 */

 /*
  * Demonstrates LV2 URID mapping, Log, and State Save/Restore
  */

#include <iostream>
#include <vector>
#include <cstdlib>

#include <lvtk/plugin.hpp>

#include "silence.h"

using namespace lvtk;
using std::vector;

#define LVTK_SILENCE_URI "http://lvtoolkit.org/plugins/silence"
#define LVTK_SILENCE_PREFIX LVTK_SILENCE_URI "#"
#define LVTK_SILENCE_MSG LVTK_SILENCE_PREFIX "msg"

class silence : public Plugin<silence, URID<true>, State<true> >
{
   public:

    silence (double rate)
    : Plugin<silence, URID<true>, State<true> > (1)
    {
       urids.atom_String = map(LV2_ATOM__String);
       urids.silence_msg = map(LVTK_SILENCE_MSG);
       urids.midi_type   = map(LV2_MIDI__MidiEvent);
    }

    void
    run(uint32_t nframes)
    {
       float *out = p(0);

       check_midi();

       for (int i = 0; i < nframes; i++)
       {
          out[i] = 0.0f;
       }
    }


    StateStatus
    save (StateStore &store, uint32_t flags,
                     	 	 	 	 const FeatureVec &features)
    {
       const char* msg = "Sorry I can't hear you. Please speak up";

       return store (urids.silence_msg, (void*)msg,
                     strlen(msg), urids.atom_String,
                     STATE_IS_POD | STATE_IS_PORTABLE);
    }


    StateStatus
    restore(StateRetrieve &retrieve, uint32_t flags,
                        		     const FeatureVec &features)
    {
       size_t size;
       uint32_t type,fs;

       const void *message =
    		   retrieve (urids.silence_msg, &size, &type, &fs);
       if (message)
       {
         std::cout << "[silence] " << (char*)message << std::endl;
         return STATE_SUCCESS;
       }

       return STATE_ERR_UNKNOWN;
    }

   private:

    void check_midi ()
    {
       const LV2_Atom_Sequence* midiseq = p<LV2_Atom_Sequence> (p_midi);
	   LV2_ATOM_SEQUENCE_FOREACH(midiseq, ev)
	   {
		  uint32_t frame_offset = ev->time.frames;
		  if (ev->body.type == urids.midi_type)
			{
			 std::cout << "MIDI\n";
			}
	   }
  	}

    struct SilenceURIs {
       LV2_URID atom_String;
       LV2_URID silence_msg;
       LV2_URID midi_type;
    } urids;

};

static int _ = silence::register_class (LVTK_SILENCE_URI);
