/**
 *  This code and information is part of Trident DPTV API (TDAPI)
 *
 *  Copyright (C) Trident Multimedia Technologies (Shanghai) Co., Ltd.
 *         2002 - 2003  All rights reserved.
 *
 *  This file provides functions for TV or demoboard remote controller.
 *
 *  Revision:
 *  20/01/2005     Created by Lewis and Archie
 *
 */

#include "tdefs.h"
#include "tio.h"
#include "tutils.h"
#include "tvkey.h"
#include "tRemote.h"

#include "thilevel.h"
#include "ttimer.h"

/*remote flag*/
static Byte s_ucRemoteFlag = 0;
static Dword dwRemoteShift = REMOTE_SHIFT_START; /*used to count shift times and generate s_RemoteData.ucRemoteTemp*/
static Byte ucRemoteLastCodeSaved = 0;

/*the following two global variables are used by remote routines*/
static Void tdRemoteCodeDetect(Byte ucRemoteCode);

static Gdata struct tagRemoteData
{
    Byte ucRemoteTemp;       /*store the temporary value of a code,tdRemoteCodeDetect was call definite times to generate a code*/
    Byte ucRemoteShift;      /*used to count shift times and generate s_RemoteData.ucRemoteTemp*/
    Byte ucPreviousCountVal; /*timer count value of last time*/
    Byte ucDataCode;     /*store the data code part*/
    Byte ucRemoteCode;
    Byte ucOffset;
    Byte ucKeyNum;
} s_RemoteData;

static Void tdIRSONY1msTimer(Void)
{
	if (t_RemoteData.wCount)
		t_RemoteData.wCount--;
	else
		ucRemoteLastCodeSaved = 0;
}

static Byte tdGetTimeInterval(Byte ucCurrentCountVal)
{
    /* when the INT0 interrupt the timer interrupt service */
    if (!ucCurrentCountVal)
        ucCurrentCountVal = tdLoadInitTimerCount();
#ifdef _TIMERCOUNT_DOWN_        
    if (ucCurrentCountVal < s_RemoteData.ucPreviousCountVal)
        ucCurrentCountVal =  s_RemoteData.ucPreviousCountVal - ucCurrentCountVal;
    else
        ucCurrentCountVal = s_RemoteData.ucPreviousCountVal + tdGetTimerBInterval() - ucCurrentCountVal;
#else
    if (ucCurrentCountVal >= s_RemoteData.ucPreviousCountVal)
        ucCurrentCountVal =  ucCurrentCountVal - s_RemoteData.ucPreviousCountVal;
    else
        ucCurrentCountVal =  ucCurrentCountVal + tdGetTimerBInterval() - s_RemoteData.ucPreviousCountVal;
#endif  
    return ucCurrentCountVal;
}

static Void tdIRSONYService(Void)
{                      
    IByte ucRemoteCode;
    IByte ucCurrentCountVal;
    
    ucCurrentCountVal =  tdGetTimerBCurrentCount();
    
#ifdef _TIMERCOUNT_DOWN_        
    if(ucCurrentCountVal > tdLoadInitTimerCount()) 
#else
    if(ucCurrentCountVal < tdLoadInitTimerCount()) 
#endif
    ucCurrentCountVal = tdLoadInitTimerCount();
    tdClearInterruptPend();
    ucRemoteCode = tdGetTimeInterval(ucCurrentCountVal);
    s_RemoteData.ucPreviousCountVal = ucCurrentCountVal;    
     
    tdRemoteCodeDetect(ucRemoteCode);    /* Analyse remote key */ 
}

static Void tdRemoteCodeDetect(Byte ucRemoteCode)
{
    IByte ucIndex;
    IByte i;
    IByte datatemp;
    
    if((s_ucRemoteFlag & _RF_SONY_STARTED_) != 0)
    {
        if((pSONYRemote->Remote_Code_0_Min <= ucRemoteCode) && (ucRemoteCode <= pSONYRemote->Remote_Code_0_Max)) 
        {
            //Check if code "0".
            tdLeftShift1(s_RemoteData.ucRemoteShift);        
        }else if((pSONYRemote->Remote_Code_1_Min <= ucRemoteCode) && ( ucRemoteCode <= pSONYRemote->Remote_Code_1_Max))   /*code 1*/
        {
            //Check if code "1".
            s_RemoteData.ucRemoteTemp += s_RemoteData.ucRemoteShift;
            tdLeftShift1(s_RemoteData.ucRemoteShift);        
        }else
        {
            //if error remote code,do not translate, and recheck the sync head pulse.
            s_ucRemoteFlag = 0;
            goto detect_head;
        }
        
        if((s_ucRemoteFlag & _RF_SONY_DATACODE_) != 0)
        {
            if(s_RemoteData.ucRemoteShift == 0x80)
            {
                s_RemoteData.ucDataCode = s_RemoteData.ucRemoteTemp;           // Store data code
                s_RemoteData.ucRemoteTemp = 0;
                s_RemoteData.ucRemoteShift = REMOTE_SHIFT_START;
                s_ucRemoteFlag &= ~_RF_SONY_DATACODE_;
                s_ucRemoteFlag |= _RF_SONY_SYSTEMCODE_;
            }
            return;
        }

        if((s_ucRemoteFlag & _RF_SONY_SYSTEMCODE_) != 0)
        {
            if(s_RemoteData.ucRemoteShift == (1 << 4))                    //pSONYRemote->System_Bit_Num can not be achieved from tool
            {
                s_ucRemoteFlag &= ~_RF_SONY_SYSTEMCODE_;
                for(ucIndex = 0; ucIndex < pSONYRemote->System_Code_Num; ucIndex++)
                {
                    if(pSONYRemote->RemoteKeySet[ucIndex].ucSystemCode == s_RemoteData.ucRemoteTemp)
                        break; 
                }
                
                if(ucIndex  == pSONYRemote->System_Code_Num)
                {
                    s_ucRemoteFlag =0;
                    goto detect_head;
                }
                else
                {
                    s_RemoteData.ucOffset = pSONYRemote->RemoteKeySet[ucIndex].ucKeySetOffset;
                    s_RemoteData.ucKeyNum = pSONYRemote->RemoteKeySet[ucIndex].ucKeyNum << 1;
                }
                
                while((*((RPByte)pSONYRemote + s_RemoteData.ucOffset + ucIndex) != s_RemoteData.ucDataCode) && (ucIndex < s_RemoteData.ucKeyNum))
                {
                     ucIndex += 2;
                }
                 
                if(ucIndex < s_RemoteData.ucKeyNum)
                {
                    s_RemoteData.ucRemoteCode = *((RPByte)pSONYRemote + s_RemoteData.ucOffset + ucIndex + 1);

                    if (s_RemoteData.ucRemoteCode == ucRemoteLastCodeSaved)
                    {
                        if (t_RemoteData.wCount < t_RemoteData.wRepeatDelay)
                        {
                            tdAddVirtualKey(s_RemoteData.ucRemoteCode /*| _VK_STATUS_DOWN_*/);
                            t_RemoteData.wCount = (2*t_RemoteData.wRepeatDelay);
                        }
                    }
                    else
                    {
                        tdAddVirtualKey(s_RemoteData.ucRemoteCode);
                        t_RemoteData.wCount = (t_RemoteData.wFirstDelay/2 + t_RemoteData.wRepeatDelay);
                    }
                    
                    s_RemoteData.ucRemoteShift = REMOTE_SHIFT_START;
                    s_RemoteData.ucRemoteTemp = 0;
                    s_RemoteData.ucDataCode = 0;
                    ucRemoteLastCodeSaved = s_RemoteData.ucRemoteCode;
                    s_RemoteData.ucRemoteCode = 0;
                }
                else
                {
                    s_ucRemoteFlag = 0;
                    s_RemoteData.ucRemoteShift = REMOTE_SHIFT_START;
                }                
            }
            return;
        }
    }

detect_head:
    if((pSONYRemote->Remote_Code_Sync_Min <= ucRemoteCode) && (ucRemoteCode <= pSONYRemote->Remote_Code_Sync_Max))   //sync code
    {
        //started parsing.
        s_ucRemoteFlag |= _RF_SONY_STARTED_;
        s_ucRemoteFlag |= _RF_SONY_DATACODE_;
        
        //set the initial value of shifting.
        s_RemoteData.ucRemoteShift = REMOTE_SHIFT_START; 
        s_RemoteData.ucRemoteTemp = 0;
        s_RemoteData.ucDataCode = 0;
    }
    else
    {
        //if error remote code,do not translate.
        s_ucRemoteFlag &= ~_RF_SONY_STARTED_;
    }
    return;
}

Code RemoteControllerDriver f_IRSONYDriver = 
{
    tdIRSONY1msTimer, tdIRSONYService
};