/*  SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
 *  Copyright (C) 2010-2011 - Hans-Kristian Arntzen
 *
 *  Some code herein may be based on code found in BSNES.
 * 
 *  SSNES 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 Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  SSNES 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 SSNES.
 *  If not, see <http://www.gnu.org/licenses/>.
 */


#ifndef __SSNES_GENERAL_H
#define __SSNES_GENERAL_H

#include <stdbool.h>
#include "driver.h"
#include <stdio.h>
#include "record/ffemu.h"
#include "message.h"
#include "rewind.h"
#include "movie.h"
#include "autosave.h"
#include "netplay.h"
#include "dynamic.h"
#include "cheats.h"
#include "audio/ext/ssnes_dsp.h"

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_SRC
#include <samplerate.h>
#else
#include "audio/hermite.h"
#endif


#define MAX_PLAYERS 5
#define MAX_BINDS 34 // Needs to be increased every time there are new binds added.
#define SSNES_NO_JOYPAD 0xFFFF

enum ssnes_shader_type
{
   SSNES_SHADER_CG,
   SSNES_SHADER_BSNES,
   SSNES_SHADER_AUTO,
   SSNES_SHADER_NONE
};

// All config related settings go here.
struct settings
{
   struct 
   {
      char driver[32];
      float xscale;
      float yscale;
      bool fullscreen;
      unsigned fullscreen_x;
      unsigned fullscreen_y;
      bool vsync;
      bool smooth;
      bool force_aspect;
      bool crop_overscan;
      float aspect_ratio;
      char cg_shader_path[256];
      char bsnes_shader_path[256];
      char filter_path[256];
      enum ssnes_shader_type shader_type;

      bool render_to_texture;
      double fbo_scale_x;
      double fbo_scale_y;
      char second_pass_shader[256];
      bool second_pass_smooth;
      char shader_dir[256];

      char font_path[256];
      unsigned font_size;
      float msg_pos_x;
      float msg_pos_y;

      bool force_16bit;

      char external_driver[256];
   } video;

   struct
   {
      char driver[32];
      bool enable;
      unsigned out_rate;
      float in_rate;
      float rate_step;
      char device[256];
      unsigned latency;
      bool sync;
      int src_quality;

      char dsp_plugin[256];
      char external_driver[256];
   } audio;

   struct
   {
      char driver[32];
      struct snes_keybind binds[MAX_PLAYERS][MAX_BINDS];
      float axis_threshold;
      unsigned joypad_map[MAX_PLAYERS];
      bool netplay_client_swap_input;
   } input;

   char libsnes[256];
   char cheat_database[256];

   char screenshot_directory[256];

   bool rewind_enable;
   unsigned rewind_buffer_size;
   unsigned rewind_granularity;

   bool pause_nonactive;
   unsigned autosave_interval;
};

enum ssnes_game_type
{
   SSNES_CART_NORMAL = 0,
   SSNES_CART_SGB,
   SSNES_CART_BSX,
   SSNES_CART_BSX_SLOTTED,
   SSNES_CART_SUFAMI,
};


// All run-time- / command line flag-related globals go here.
struct global
{
   bool verbose;
   bool audio_active;
   bool video_active;
   bool force_fullscreen;

   bool has_mouse[2];
   bool has_scope[2];
   bool has_justifier;
   bool has_justifiers;
   bool has_multitap;
   bool disconnect_device[2];

   FILE *rom_file;
   enum ssnes_game_type game_type;
   uint32_t cart_crc;

   char gb_rom_path[256];
   char bsx_rom_path[256];
   char sufami_rom_path[2][256];
   bool has_set_save_path;
   bool has_set_state_path;

#ifdef HAVE_CONFIGFILE
   char config_path[256];
#endif
   
   char basename[256];
   char savefile_name_srm[256];
   char savefile_name_rtc[512]; // Make sure that fill_pathname has space.
   char savefile_name_psrm[512];
   char savefile_name_asrm[512];
   char savefile_name_bsrm[512];
   char savestate_name[256];
   char ups_name[512];
   char xml_name[512];

   unsigned state_slot;

   struct
   {
#ifdef HAVE_SRC
      SRC_STATE *source;
#else
      hermite_resampler_t *source;
#endif

      float *data;
      size_t data_ptr;
      size_t chunk_size;
      size_t nonblock_chunk_size;
      size_t block_chunk_size;

      bool use_float;

      float *outsamples;
      int16_t *conv_outsamples;

      dylib_t dsp_lib;
      const ssnes_dsp_plugin_t *dsp_plugin;
      void *dsp_handle;
   } audio_data;

   struct
   {
      bool active;
      uint32_t *buffer;
      uint32_t *colormap;
      unsigned pitch;
      dylib_t lib;
      unsigned scale;

      void (*psize)(unsigned *width, unsigned *height);
      void (*prender)(uint32_t *colormap, uint32_t *output, unsigned outpitch,
            const uint16_t *input, unsigned pitch, unsigned width, unsigned height);
   } filter;

   msg_queue_t *msg_queue;

   // Rewind support.
   state_manager_t *state_manager;
   void *state_buf;
   bool frame_is_reverse;

   // Movie record support
   bsv_movie_t *bsv_movie;
   char bsv_movie_path[256];
   bool bsv_movie_end;
   bool bsv_movie_playback;

   // Pausing support
   bool is_paused;

   // Autosave support.
   autosave_t *autosave[2];

   // Netplay.
   netplay_t *netplay;
   char netplay_server[256];
   bool netplay_enable;
   bool netplay_is_client;
   unsigned netplay_sync_frames;
   uint16_t netplay_port;

   // FFmpeg record.
#ifdef HAVE_FFMPEG
   ffemu_t *rec;
   char record_path[256];
   bool recording;
#endif

   char title_buf[64];

   struct
   {
      char** elems;
      size_t size;
      size_t ptr;
   } shader_dir;

   char sha256[64 + 1];

   bool do_screenshot;

#ifdef HAVE_XML
   cheat_manager_t *cheat;
#endif
};

void parse_config(void);

extern struct settings g_settings;
extern struct global g_extern;

#define SSNES_LOG(...) do { \
   if (g_extern.verbose) \
      fprintf(stderr, "SSNES: " __VA_ARGS__); \
      fflush(stderr); \
   } while(0)

#define SSNES_ERR(...) do { \
      fprintf(stderr, "SSNES [ERROR] :: " __VA_ARGS__); \
      fflush(stderr); \
   } while(0)

#define SSNES_WARN(...) do { \
      fprintf(stderr, "SSNES [WARN] :: " __VA_ARGS__); \
      fflush(stderr); \
   } while(0)

static inline uint32_t next_pow2(uint32_t v)
{
   v--;
   v |= v >> 1;
   v |= v >> 2;
   v |= v >> 4;
   v |= v >> 8;
   v |= v >> 16;
   v++;
   return v;
}

static inline uint8_t is_little_endian(void)
{
   union
   {
      uint16_t x;
      uint8_t y[2];
   } u;

   u.x = 1;
   return u.y[0];
}

#endif