ui_playlist.c

来自「MP3 整个 SDK」· C语言 代码 · 共 236 行

/*
*******************************************************************************
*                ACTOS AP
*        ap common lib, directory control file
*
*        (c) Copyright, Actions Co,Ld.
*             All Right Reserved
*
*  $Id: ui_playlist.c,v 1.1.1.1 2006/05/22 03:23:59 selina Exp $
*******************************************************************************
*/
#pragma codeseg(COM_PLAYLIST)

#include "ap_common.h"
#include "list.h"
#include "filesys.h"

WORD   playlist_active,cur_grouplist;    //目录总数,文件总数和浏览项数,浏览活动项
extern  WORD    PlaylistClassTotal;
extern  WORD    PlaylistCurClass;
extern BYTE ScrollFlag;

#pragma memory=dataseg(RCODE)
#pragma memory=default
void ShowPlaylist(BYTE top,BYTE bottom,BYTE Old_active,BYTE active,char *Longnamebuf,BYTE string_id,BYTE ScrollMode);
void reinit_idm_buf_playlist(int top, int bottom, char *Longnamebuf, BYTE string_id,BOOL direction);

static void DmaCpy(WORD descadd, BYTE descpg, WORD srcadd, BYTE srcpg, WORD Length);

/********************************************************************************
* Description : select the directory.
*
* Arguments  :
*            location: get thedisk type
*            type : show file kind
*            string_id: language type
* Returns     :
*            other:    Successful
*            0:    Fail, detail information in fselError
* Notes       :  only select the valid directory
*
********************************************************************************/

int ui_playlist(file_location_t *location, BYTE type,BYTE string_id)
{
    BYTE i, pagebak,TimeoutCnt;
    char * Strname;
    BYTE  result;        
    char key;
    int top, bottom;  

    if ( !fselSetLocation(location) )
    {
        return RESULT_IGNORE;
    }

    if (PlaylistClassTotal == 0)
        return RESULT_IGNORE;

////////////////////////////////换页//////////////////////////////////////
    DmaCpy( 0x4000, 0x06, 0x4000, 0x07, 0x2000-1 );     //备份第7页0x4000~0x6000的8K代码到第6页0x4000~0x6000
    i = input8(0x05);
    output8(0x05, 0xf6);
    pagebak = SetSWAPAddress(0x06);
    Strname = (char *)STRNAMEBUF;
////////////////////////////////换页//////////////////////////////////////

    memset(Strname, 0x00, LISTNAME_DISP_LENNGTH+1);
    while(PlaylistCurClass>1)       //返回根目录
    {
     fselGetPrevGroup(Strname); 
    }   
    top=0;
    bottom=4;
    playlist_active=0;
    cur_grouplist=0;
    if(PlaylistClassTotal<5)
       bottom=PlaylistClassTotal-1;
    FSELGetLocation(location);          //保存location
    reinit_idm_buf_playlist(top, bottom, Strname, string_id,TRUE);
    FSELSetLocation(location);
    ShowPlaylist(top,bottom,playlist_active,playlist_active,Strname,string_id,1);
    while(ap_get_message()!=0) {;}      //丢掉多余按键

    ap_message_init(NULL);
    while(1)
    {
        //handle msg
        key = ap_get_message();
        switch(key)
        {

        case AP_KEY_NEXT:
        case AP_KEY_NEXT | AP_KEY_HOLD:

          if(playlist_active<PlaylistClassTotal -1 )  //当前项小于总列表数
            {

             fselGetNextGroup(Strname);
             playlist_active++;
                 if(playlist_active/5==cur_grouplist)
                   {
                              ShowPlaylist(top,bottom,playlist_active-1,playlist_active,Strname,string_id,1);
                   }
                 else
                    {
                      cur_grouplist=cur_grouplist+1;
                      top=(playlist_active/5)*5; //顶的序号
                      bottom=top+4;                  //底的序号
                      if(bottom>(PlaylistClassTotal-1))
                        bottom=PlaylistClassTotal-1;
                      FSELGetLocation(location);
                      reinit_idm_buf_playlist(top, bottom, Strname, string_id,TRUE);       //换页要重新初始化IDM数据
                      FSELSetLocation(location);
                              ShowPlaylist(top,bottom,playlist_active,playlist_active,Strname,string_id,1);
                    }

                 }                
            while(ap_get_message() != 0);
            break;
        case AP_KEY_PREV:
        case AP_KEY_PREV | AP_KEY_HOLD :
           if(playlist_active >0)
              {
                 fselGetPrevGroup(Strname);
                  playlist_active--;
                if(playlist_active/5==cur_grouplist)
                  {
                            ShowPlaylist(top,bottom,playlist_active+1,playlist_active,Strname,string_id,1);
                  }
                 else
                    {
                       cur_grouplist=cur_grouplist-1;
                       top=(playlist_active/5)*5; //顶的序号
                       bottom=top+4;          //底的序号
                       FSELGetLocation(location);
                       reinit_idm_buf_playlist(top, bottom, Strname, string_id,FALSE);       //换页要重新初始化IDM数据
                       FSELSetLocation(location);
                               ShowPlaylist(top,bottom,playlist_active,playlist_active,Strname,string_id,1);
                    }
                 }
        while(ap_get_message() != 0);
              break;

            case AP_KEY_PLAY | AP_KEY_UP:
                 FSELSetLocation(location);         //restore the selecting result
                 result = RESULT_IGNORE;
                 goto funreturn;
                 break;
            case AP_KEY_MODE | AP_KEY_LONG:
                 if ( FSELGetLocation(location) )   //store the selecting result
                     result = RESULT_NULL;
                 else
                     result = RESULT_IGNORE;
                 goto funreturn;
                 break;
            case AP_KEY_MODE | AP_KEY_UP:
                 break;
            case AP_MSG_WAIT_TIMEOUT:
                 TimeoutCnt++;
                 if ( TimeoutCnt >= 24 )  //192秒后退出，因为要看长名滚屏
                 {
                    if (FSELGetLocation(location))     //store the selecting result
                        result = RESULT_NULL;
                    else
                        result = RESULT_IGNORE;
                    goto funreturn;
                 }
                 break;

            case AP_MSG_SD_OUT:
                 //如在游览SD卡，但SD卡又被拔出，就返回拔出信号
                 if (location->disk == 'H')
                 {
                     result = RESULT_SD_OUT;
                     goto funreturn;
                 }
                 break;

            case AP_MSG_SD_IN:
                 break;

            case AP_MSG_RTC:
                 break;

            default:
                 key=ap_handle_hotkey(key);
                 if(key == RESULT_REDRAW)
                 {
                ShowPlaylist(top,bottom,playlist_active,playlist_active,Strname,string_id,1);
                 }
                 else if( key != 0 )
                 {
                        FSELGetLocation(location);      //store the selecting result
                        result = key;
                        goto funreturn;
                 }
            if(ScrollFlag)
                 ShowPlaylist(top,bottom,playlist_active,playlist_active,Strname,string_id,0);    
        } //switch()
    }

funreturn:
////////////////////////////////换页//////////////////////////////////////
    DmaCpy( 0x4000, 0x07, 0x4000, 0x06, 0x2000-1 );     //恢复8K代码到第7页    
    output8(0x05, i);
    SetSWAPAddress(pagebak);
////////////////////////////////换页//////////////////////////////////////


    return result;
}




static void DmaCpy(WORD descadd, BYTE descpg, WORD srcadd, BYTE srcpg, WORD Length)
{
    output8(REG14_DMA2SRCAddr0, (BYTE)(srcadd));
    output8(REG15_DMA2SRCAddr1, (BYTE)(srcadd >> 8));
    output8(REG16_DMA2SRCAddr2, 0x00);
    output8(REG17_DMA2SRCAddr3, 0x40);                  //IDM/IPM/ZRAM2
    output8(REG18_DMA2SRCAddrIntSramReg, srcpg);    //ZRAM2PAGE
    output8(REG19_DMA2DSTAddr0, (BYTE)(descadd));
    output8(REG1A_DMA2DSTAddr1, (BYTE)(descadd >> 8));
    output8(REG1B_DMA2DSTAddr2, 0x00);
    output8(REG1C_DMA2DSTAddr3, 0x40);                  //IDM/IPM/ZRAM2
    output8(REG1D_DMA2DSTAddrIntSram, descpg);        //IDMHPAGE_06
    output8(REG1E_DMA2ByteCounterLow, (BYTE)(Length));
    output8(REG1F_DMA2ByteCounterHi, (BYTE)(Length >> 8));
    output8(REG20_DMA2Mode, 0x00);
    output8(REG21_DMA2CMD, 0x01);
    while( input8(REG21_DMA2CMD)&0x01 != 0x00 ) {}
    return;
}