/***********************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.

  (c) Copyright 1996 - 2002  Gary Henderson (gary.henderson@ntlworld.com),
                             Jerremy Koot (jkoot@snes9x.com)

  (c) Copyright 2002 - 2004  Matthew Kendora

  (c) Copyright 2002 - 2005  Peter Bortas (peter@bortas.org)

  (c) Copyright 2004 - 2005  Joel Yliluoma (http://iki.fi/bisqwit/)

  (c) Copyright 2001 - 2006  John Weidman (jweidman@slip.net)

  (c) Copyright 2002 - 2006  funkyass (funkyass@spam.shaw.ca),
                             Kris Bleakley (codeviolation@hotmail.com)

  (c) Copyright 2002 - 2010  Brad Jorsch (anomie@users.sourceforge.net),
                             Nach (n-a-c-h@users.sourceforge.net),

  (c) Copyright 2002 - 2011  zones (kasumitokoduck@yahoo.com)

  (c) Copyright 2006 - 2007  nitsuja

  (c) Copyright 2009 - 2016  BearOso,
                             OV2

  (c) Copyright 2011 - 2016  Hans-Kristian Arntzen,
                             Daniel De Matteis
                             (Under no circumstances will commercial rights be given)


  BS-X C emulator code
  (c) Copyright 2005 - 2006  Dreamer Nom,
                             zones

  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003  _Demo_ (_demo_@zsnes.com),
                             Nach,
                             zsKnight (zsknight@zsnes.com)

  C4 C++ code
  (c) Copyright 2003 - 2006  Brad Jorsch,
                             Nach

  DSP-1 emulator code
  (c) Copyright 1998 - 2006  _Demo_,
                             Andreas Naive (andreasnaive@gmail.com),
                             Gary Henderson,
                             Ivar (ivar@snes9x.com),
                             John Weidman,
                             Kris Bleakley,
                             Matthew Kendora,
                             Nach,
                             neviksti (neviksti@hotmail.com)

  DSP-2 emulator code
  (c) Copyright 2003         John Weidman,
                             Kris Bleakley,
                             Lord Nightmare (lord_nightmare@users.sourceforge.net),
                             Matthew Kendora,
                             neviksti

  DSP-3 emulator code
  (c) Copyright 2003 - 2006  John Weidman,
                             Kris Bleakley,
                             Lancer,
                             z80 gaiden

  DSP-4 emulator code
  (c) Copyright 2004 - 2006  Dreamer Nom,
                             John Weidman,
                             Kris Bleakley,
                             Nach,
                             z80 gaiden

  OBC1 emulator code
  (c) Copyright 2001 - 2004  zsKnight,
                             pagefault (pagefault@zsnes.com),
                             Kris Bleakley
                             Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code used in 1.39-1.51
  (c) Copyright 2002         Matthew Kendora with research by
                             zsKnight,
                             John Weidman,
                             Dark Force

  SPC7110 and RTC C++ emulator code used in 1.52+
  (c) Copyright 2009         byuu,
                             neviksti

  S-DD1 C emulator code
  (c) Copyright 2003         Brad Jorsch with research by
                             Andreas Naive,
                             John Weidman

  S-RTC C emulator code
  (c) Copyright 2001 - 2006  byuu,
                             John Weidman

  ST010 C++ emulator code
  (c) Copyright 2003         Feather,
                             John Weidman,
                             Kris Bleakley,
                             Matthew Kendora

  Super FX x86 assembler emulator code
  (c) Copyright 1998 - 2003  _Demo_,
                             pagefault,
                             zsKnight

  Super FX C emulator code
  (c) Copyright 1997 - 1999  Ivar,
                             Gary Henderson,
                             John Weidman

  Sound emulator code used in 1.5-1.51
  (c) Copyright 1998 - 2003  Brad Martin
  (c) Copyright 1998 - 2006  Charles Bilyue'

  Sound emulator code used in 1.52+
  (c) Copyright 2004 - 2007  Shay Green (gblargg@gmail.com)

  S-SMP emulator code used in 1.54+
  (c) Copyright 2016         byuu

  SH assembler code partly based on x86 assembler code
  (c) Copyright 2002 - 2004  Marcus Comstedt (marcus@mc.pp.se)

  2xSaI filter
  (c) Copyright 1999 - 2001  Derek Liauw Kie Fa

  HQ2x, HQ3x, HQ4x filters
  (c) Copyright 2003         Maxim Stepin (maxim@hiend3d.com)

  NTSC filter
  (c) Copyright 2006 - 2007  Shay Green

  GTK+ GUI code
  (c) Copyright 2004 - 2016  BearOso

  Win32 GUI code
  (c) Copyright 2003 - 2006  blip,
                             funkyass,
                             Matthew Kendora,
                             Nach,
                             nitsuja
  (c) Copyright 2009 - 2016  OV2

  Mac OS GUI code
  (c) Copyright 1998 - 2001  John Stiles
  (c) Copyright 2001 - 2011  zones

  Libretro port
  (c) Copyright 2011 - 2016  Hans-Kristian Arntzen,
                             Daniel De Matteis
                             (Under no circumstances will commercial rights be given)


  Specific ports contains the works of other authors. See headers in
  individual files.


  Snes9x homepage: http://www.snes9x.com/

  Permission to use, copy, modify and/or distribute Snes9x in both binary
  and source form, for non-commercial purposes, is hereby granted without
  fee, providing that this license information and copyright notice appear
  with all copies and any derived work.

  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software or it's derivatives.

  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes,
  but is not limited to, charging money for Snes9x or software derived from
  Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
  using Snes9x as a promotion for your commercial product.

  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.

  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
 ***********************************************************************************/


#ifndef _NETPLAY_H_
#define _NETPLAY_H_

/*
 * Client to server joypad update
 *
 * magic        1
 * sequence_no  1
 * opcode       1
 * joypad data  4
 *
 * Server to client joypad update
 * magic        1
 * sequence_no  1
 * opcode       1 + num joypads (top 3 bits)
 * joypad data  4 * n
 */

//#define NP_DEBUG 1

#define NP_VERSION 10
#define NP_JOYPAD_HIST_SIZE 120
#define NP_DEFAULT_PORT 6096

#define NP_MAX_CLIENTS 8

#define NP_SERV_MAGIC 'S'
#define NP_CLNT_MAGIC 'C'

#define NP_CLNT_HELLO 0
#define NP_CLNT_JOYPAD 1
#define NP_CLNT_RESET 2
#define NP_CLNT_PAUSE 3
#define NP_CLNT_LOAD_ROM 4
#define NP_CLNT_ROM_IMAGE 5
#define NP_CLNT_FREEZE_FILE 6
#define NP_CLNT_SRAM_DATA 7
#define NP_CLNT_READY 8
#define NP_CLNT_LOADED_ROM 9
#define NP_CLNT_RECEIVED_ROM_IMAGE 10
#define NP_CLNT_WAITING_FOR_ROM_IMAGE 11

#define NP_SERV_HELLO 0
#define NP_SERV_JOYPAD 1
#define NP_SERV_RESET 2
#define NP_SERV_PAUSE 3
#define NP_SERV_LOAD_ROM 4
#define NP_SERV_ROM_IMAGE 5
#define NP_SERV_FREEZE_FILE 6
#define NP_SERV_SRAM_DATA 7
#define NP_SERV_READY 8

struct SNPClient
{
    volatile uint8 SendSequenceNum;
    volatile uint8 ReceiveSequenceNum;
    volatile bool8 Connected;
    volatile bool8 SaidHello;
    volatile bool8 Paused;
    volatile bool8 Ready;
    int Socket;
    char *ROMName;
    char *HostName;
    char *Who;
};

enum {
    NP_SERVER_SEND_ROM_IMAGE,
    NP_SERVER_SYNC_ALL,
    NP_SERVER_SYNC_CLIENT,
    NP_SERVER_SEND_FREEZE_FILE_ALL,
    NP_SERVER_SEND_ROM_LOAD_REQUEST_ALL,
    NP_SERVER_RESET_ALL,
    NP_SERVER_SEND_SRAM_ALL,
    NP_SERVER_SEND_SRAM
};

#define NP_MAX_TASKS 20

struct NPServerTask
{
    uint32 Task;
    void  *Data;
};

struct SNPServer
{
    struct SNPClient Clients [NP_MAX_CLIENTS];
    int    NumClients;
    volatile struct NPServerTask TaskQueue [NP_MAX_TASKS];
    volatile uint32 TaskHead;
    volatile uint32 TaskTail;
    int    Socket;
    uint32 FrameTime;
    uint32 FrameCount;
    char   ROMName [30];
    uint32 Joypads [NP_MAX_CLIENTS];
    bool8  ClientPaused;
    uint32 Paused;
    bool8  SendROMImageOnConnect;
    bool8  SyncByReset;
};

#define NP_MAX_ACTION_LEN 200

struct SNetPlay
{
    volatile uint8  MySequenceNum;
    volatile uint8  ServerSequenceNum;
    volatile bool8  Connected;
    volatile bool8  Abort;
    volatile uint8  Player;
    volatile bool8  ClientsReady [NP_MAX_CLIENTS];
    volatile bool8  ClientsPaused [NP_MAX_CLIENTS];
    volatile bool8  Paused;
    volatile bool8  PendingWait4Sync;
    volatile uint8  PercentageComplete;
    volatile bool8  Waiting4EmulationThread;
    volatile bool8  Answer;
#ifdef __WIN32__
    HANDLE          ReplyEvent;
#endif
    volatile int    Socket;
    char *ServerHostName;
    char *ROMName;
    int Port;
    volatile uint32 JoypadWriteInd;
    volatile uint32 JoypadReadInd;
    uint32 Joypads [NP_JOYPAD_HIST_SIZE][NP_MAX_CLIENTS];
    uint32 Frame [NP_JOYPAD_HIST_SIZE];
    uint32 FrameCount;
    uint32 MaxFrameSkip;
    uint32 MaxBehindFrameCount;
    bool8 JoypadsReady [NP_JOYPAD_HIST_SIZE][NP_MAX_CLIENTS];
    char   ActionMsg [NP_MAX_ACTION_LEN];
    char   ErrorMsg [NP_MAX_ACTION_LEN];
    char   WarningMsg [NP_MAX_ACTION_LEN];
};

extern "C" struct SNetPlay NetPlay;

//
// NETPLAY_CLIENT_HELLO message format:
// header
// frame_time (4)
// ROMName (variable)

#define WRITE_LONG(p, v) { \
*((p) + 0) = (uint8) ((v) >> 24); \
*((p) + 1) = (uint8) ((v) >> 16); \
*((p) + 2) = (uint8) ((v) >> 8); \
*((p) + 3) = (uint8) ((v) >> 0); \
}

#define READ_LONG(p) \
((((uint8) *((p) + 0)) << 24) | \
 (((uint8) *((p) + 1)) << 16) | \
 (((uint8) *((p) + 2)) <<  8) | \
 (((uint8) *((p) + 3)) <<  0))

bool8 S9xNPConnectToServer (const char *server_name, int port,
                            const char *rom_name);
bool8 S9xNPWaitForHeartBeat ();
bool8 S9xNPWaitForHeartBeatDelay (uint32 time_msec = 0);
bool8 S9xNPCheckForHeartBeat (uint32 time_msec = 0);
uint32 S9xNPGetJoypad (int which1);
bool8 S9xNPSendJoypadUpdate (uint32 joypad);
void S9xNPDisconnect ();
bool8 S9xNPInitialise ();
bool8 S9xNPSendData (int fd, const uint8 *data, int len);
bool8 S9xNPGetData (int fd, uint8 *data, int len);

void S9xNPSyncClients ();
void S9xNPStepJoypadHistory ();

void S9xNPResetJoypadReadPos ();
bool8 S9xNPSendReady (uint8 op = NP_CLNT_READY);
bool8 S9xNPSendPause (bool8 pause);
void S9xNPReset ();
void S9xNPSetAction (const char *action, bool8 force = FALSE);
void S9xNPSetError (const char *error);
void S9xNPSetWarning (const char *warning);
void S9xNPDiscardHeartbeats ();
void S9xNPServerQueueSendingFreezeFile (const char *filename);
void S9xNPServerQueueSyncAll ();
void S9xNPServerQueueSendingROMImage ();
void S9xNPServerQueueSendingLoadROMRequest (const char *filename);

void S9xNPServerAddTask (uint32 task, void *data);

bool8 S9xNPStartServer (int port);
void S9xNPStopServer ();
#ifdef __WIN32__
#define S9xGetMilliTime timeGetTime
#else
uint32 S9xGetMilliTime ();
#endif
#endif
