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    Copyright (C) 2006 Paul Davis 
    Written by Taybin Rutkin

    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
    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_audio_unit_h__
#define __ardour_audio_unit_h__

#include <stdint.h>
#include <boost/shared_ptr.hpp>

#include <list>
#include <set>
#include <string>
#include <vector>

#include <ardour/plugin.h>

#include <AudioUnit/AudioUnit.h>
#include <appleutility/AUParamInfo.h>

#include <boost/shared_ptr.hpp>

class CAComponent;
class CAAudioUnit;
class CAComponentDescription;
struct AudioBufferList;

namespace ARDOUR {

class AudioEngine;
class Session;

struct AUParameterDescriptor : public Plugin::ParameterDescriptor {
      // additional fields to make operations more efficient
      AudioUnitParameterID id;
      AudioUnitScope scope;
      AudioUnitElement element;
      float default_value;
      bool automatable;
      AudioUnitParameterUnit unit;

class AUPlugin : public ARDOUR::Plugin
      AUPlugin (AudioEngine& engine, Session& session, boost::shared_ptr<CAComponent> comp);
      AUPlugin (const AUPlugin& other);
      virtual ~AUPlugin ();
        std::string unique_id () const;
      const char * label () const;
      const char * name () const { return _info->name.c_str(); }
      const char * maker () const { return _info->creator.c_str(); }
      uint32_t parameter_count () const;
      float default_value (uint32_t port);
      nframes_t latency () const;
      void set_parameter (uint32_t which, float val);
      float get_parameter (uint32_t which) const;
      int get_parameter_descriptor (uint32_t which, ParameterDescriptor&) const;
      uint32_t nth_parameter (uint32_t which, bool& ok) const;
      void activate ();
      void deactivate ();
      void set_block_size (nframes_t nframes);
      int connect_and_run (vector<Sample*>& bufs, uint32_t maxbuf, int32_t& in, int32_t& out, nframes_t nframes, nframes_t offset);
      std::set<uint32_t> automatable() const;
      string describe_parameter (uint32_t);
      string state_node_name () const { return "audiounit"; }
      void print_parameter (uint32_t, char*, uint32_t len) const;
      bool parameter_is_audio (uint32_t) const;
      bool parameter_is_control (uint32_t) const;
      bool parameter_is_input (uint32_t) const;
      bool parameter_is_output (uint32_t) const;
      XMLNode& get_state();
      int set_state(const XMLNode& node);
      bool save_preset (string name);
      bool load_preset (const string preset_label);
      std::vector<std::string> get_presets ();
      bool has_editor () const;
      int32_t can_do (int32_t in, int32_t& out);
      uint32_t output_streams() const;
      uint32_t input_streams() const;
      int32_t configure_io (int32_t in, int32_t out);

      boost::shared_ptr<CAAudioUnit> get_au () { return unit; }
      boost::shared_ptr<CAComponent> get_comp () const { return comp; }
        OSStatus render_callback(AudioUnitRenderActionFlags *ioActionFlags,
                         const AudioTimeStamp    *inTimeStamp,
                         UInt32       inBusNumber,
                         UInt32       inNumberFrames,
                         AudioBufferList*       ioData);
        boost::shared_ptr<CAComponent> comp;
        boost::shared_ptr<CAAudioUnit> unit;

        bool initialized;
      int32_t input_channels;
      int32_t output_channels;
      std::vector<std::pair<int,int> > io_configs;
      AudioBufferList* buffers;
      UInt32 global_elements;
      UInt32 output_elements;
      UInt32 input_elements;
      int set_output_format (AudioStreamBasicDescription&);
      int set_input_format (AudioStreamBasicDescription&);
      int set_stream_format (int scope, uint32_t cnt, AudioStreamBasicDescription&);
        int _set_block_size (nframes_t nframes);
      void discover_parameters ();

      std::vector<std::pair<uint32_t, uint32_t> > parameter_map;
      uint32_t current_maxbuf;
        nframes_t current_offset;
        nframes_t cb_offset;
        vector<Sample*>* current_buffers;
        nframes_t frames_processed;
      std::vector<AUParameterDescriptor> descriptors;
      void init ();
typedef boost::shared_ptr<AUPlugin> AUPluginPtr;

struct AUPluginCachedInfo { 
      std::vector<std::pair<int,int> > io_configs;

class AUPluginInfo : public PluginInfo {
       AUPluginInfo (boost::shared_ptr<CAComponentDescription>);
      ~AUPluginInfo ();

      PluginPtr load (Session& session);

      AUPluginCachedInfo cache;

      static PluginInfoList discover ();
      static void get_names (CAComponentDescription&, std::string& name, Glib::ustring& maker);
        static std::string stringify_descriptor (const CAComponentDescription&);

      static int load_cached_info ();

      boost::shared_ptr<CAComponentDescription> descriptor;
      UInt32 version;

      static void discover_music (PluginInfoList&);
      static void discover_fx (PluginInfoList&);
      static void discover_by_description (PluginInfoList&, CAComponentDescription&);
      static Glib::ustring au_cache_path ();

      typedef std::map<std::string,AUPluginCachedInfo> CachedInfoMap;
      static CachedInfoMap cached_info;
      static bool cached_io_configuration (const std::string&, UInt32, CAComponent&, AUPluginCachedInfo&, const std::string& name);
      static void add_cached_info (const std::string&, AUPluginCachedInfo&);
      static void save_cached_info ();

typedef boost::shared_ptr<AUPluginInfo> AUPluginInfoPtr;

} // namespace ARDOUR

#endif // __ardour_audio_unit_h__

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