nav_menu.c

ESS3890+SL原代码（1*16内存）

                    icon_id = ICON_DISC;
                }else
#endif
                {
                    icon_id = ICON_MP3;
                }

#if (defined MP3 || defined WMA_DEC)
		if ( 0
#ifdef MP3
		     || ((STREAM_type == MP3_ID) && (MPG_frames))	
#endif
#ifdef WMA_DEC
		     || ((STREAM_type == WMA_ID) && (wma_smpl_num))
#endif
		 ) {
		    AUD_service();
		}
#endif /* MP3 || WMA_DEC */
                if ( (switch_page==1) || (j==mp3_select) || (j==pre_item) )
                    redraw_item = 1;
                else redraw_item = 0;

                hli = (j==mp3_select)?1:0;
                if( mp3_menu_changed || redraw_item){
                    color_mapping(0, hli, &color1, &color2);
                    button_erase(x, y, BTN_LENGTH, 1, BACK_COLOR);
                    ICON_charset_select(VWENGLISH_FONTS);
                    ICON_set_bkcolor(BACK_COLOR);
                    ICON_auto_mapping(1);
                    show_icon(icon_id, x, y, 0, 2);
                    ICON_auto_mapping(0);
                    ICON_charset_restore();
                    CG_map_color_array(BACK_COLOR, 13, 3);
                    show_text(iso9660_file[i].name, x, y, 40, 2, 0);
                    ICON_set_bkcolor(0);
		}
                frame_color_restore(0,hli,x,y,CG_FRAME_DX);
                j++;
#ifdef MP3_VERT_LISTING
#ifdef LONG_FILENAME_SUPP
                y++;
                if (y >= 10)
		    break;
#else
                y++;
                if (y >= 10) {
                    y = 0;
                    x += HorzSpace;
                    if (x > (HorzSpace+1)) break;
                }
		
#endif LONG_FILENAME_SUPP
#else
                x += HorzSpace;
                if (x > (HorzSpace+1)){
                    x = 1;
                    y++;
                    if (y >= 10) break;
                }
#endif /* MP3_VERT_LISTING */
            }
            file_cnt++;
        }
    }
    
    if( (!mp3_menu_changed) && (switch_page!=1) ) return;
    
    for ( i=j; i<ItemNum; i++ ) {
        button_erase(x, y, BTN_LENGTH, 1, BACK_COLOR);
        CG_show_frame(x,y,CG_FRAME_DX,1,0);
	
#ifdef MP3_VERT_LISTING
#ifdef LONG_FILENAME_SUPP
        y++;
        if (y >= 10)
	    break;
#else
        y++;
        if (y >= 10) {
	    y = 0;
	    x += HorzSpace;
            if (x > (HorzSpace+1)) break;
        }
#endif LONG_FILENAME_SUPP
#else 
        x += HorzSpace;
        if (x > (HorzSpace+1)){
              x = 1;
              y++;
	      if (y >= 10) break;
        }
#endif /* MP3_VERT_LISTING */
    }
}

/* list MP3 root (those directories with MP3 files */
static void MP3_menu()
{
    int i,hli,j=0;
    int x=1,y=4;
    int color1,color2;
    unsigned char pmsg[20];
    int pre_item;
    int redraw_item = 0;
    int switch_page = 0;
    int prev_dir_page = -1;


    prev_dir_page = mp3_root_page;
    if(mp3_menu_changed) prev_dir_page = -1;

    mp3_root_page = mp3_dir/ItemNum;
    mp3_select = mp3_dir-mp3_root_page*ItemNum;
    pre_item = prev_dir_item - mp3_root_page*ItemNum;

    if( prev_dir_page != mp3_root_page) switch_page = 1;

    MP3_page_buf(mp3_root_page+1, mp3_total_page+1);
    CG_map_color_array(BACK_COLOR, 13, 3);
    show_text(MP3_PAGE, MP3_PAGE_XSTART, MP3_PAGE_YSTART, 0, 6, 0);

    memcpy(MP3_DIR, MSG_root, 5);
    CG_map_color_array(BACK_COLOR, 13, 3);
    show_text(MP3_DIR, 1,1,0,6,0);
    
    for (i=mp3_root_page*ItemNum; i<real_track_cnt; i++){

        if( (switch_page==1) || (j==mp3_select) || (j==pre_item) )
	    redraw_item = 1;
        else redraw_item = 0;
	
        hli = (j==mp3_select)?1:0;
        if (mp3_menu_changed || redraw_item ){
            color_mapping(0, hli, &color1, &color2);
            button_erase(x, y, BTN_LENGTH, 1, BACK_COLOR);
            ICON_charset_select(VWENGLISH_FONTS);
            ICON_set_bkcolor(BACK_COLOR);
            show_icon(ICON_FOLDER, x, y, 0, 2);
            ICON_charset_restore();
            CG_map_color_array(BACK_COLOR, 13, 3);
            show_text(iso9660_dir[real_track[i]].name, x, y, 40, 2, 0);
            ICON_set_bkcolor(0);
        }
        frame_color_restore(0,hli,x,y,CG_FRAME_DX);
        j++;
	
#ifdef MP3_VERT_LISTING
#ifdef LONG_FILENAME_SUPP
        y++;
        if (y >= 10)
           break;
#else
        y++;
        if (y >= 10) {
            y = 0;
            x += HorzSpace;
            if (x > (HorzSpace+1)) break;
        }
#endif LONG_FILENAME_SUPP
#else 
        x += HorzSpace;
        if (x > (HorzSpace+1)){
            x = 1;
            y++;
            if (y >= 10) break;
        }
#endif /* MP3_VERT_LISTING */
    }

    if ( (!mp3_menu_changed) && (switch_page!=1) ) return;
    for ( i=j; i<ItemNum; i++ ) {
        button_erase(x, y, BTN_LENGTH, 1, BACK_COLOR);
        CG_show_frame(x, y, CG_FRAME_DX, 1, 0);

#ifdef MP3_VERT_LISTING
#ifdef LONG_FILENAME_SUPP
        y++;
        if (y >= 10)
	    break;
#else
        y++;
        if (y >= 10) {
             y = 0;
             x += HorzSpace;
	     if (x > (HorzSpace+1)) break;
        }
#endif LONG_FILENAME_SUPP
#else
        x += HorzSpace;
        if (x > (HorzSpace+1)){
	    x = 1;
	    y++;
	    if (y >= 10) break;
        }
#endif /* MP3_VERT_LISTING */
    }
}

/* list MP3 info */
void MP3_select()
{
#ifdef MP3CDG
    if (MP3CDG_started) {
        mp3_menu_changed = 0;
        return;
     }
#endif
    if (mp3_menu_changed == 1){
        if (in_mp3_root) {
            MP3_draw_box();
            MP3_menu();
        }
        else {
            MP3_draw_box();
            MP3_track();
        }
    } else if (mp3_menu_changed == 2) {
	CG_map_color_array(BACK_COLOR, 13, 3);
        show_text(MP3_PAGE, MP3_PAGE_XSTART, MP3_PAGE_YSTART, 0, 6, 0);
    } else if (mp3_menu_changed == 3) {
	CG_map_color_array(BACK_COLOR, 13, 3);
        show_text(MP3_DIR, 1,1,0,6,0);
    }

    mp3_menu_changed = 0;
}


/* move MP3 item selection */
void MP3_item(int des)
{
    if (in_mp3_root){
        prev_dir_item = -1;
        mp3_dir += des;
	if ((des > 0) && (mp3_dir >= real_track_cnt))
            mp3_dir = 0;
	if ((des < 0) && (mp3_dir < 0))
	    mp3_dir = real_track_cnt - 1;
        MP3_menu();
    }
    else{
        prev_file_item = mp3_song;
        prev_dir_item = mp3_dir;
        mp3_song += des;
        if ((des > 0) && (mp3_song >= iso9660_dir[real_track[mp3_dir]].dir))
            mp3_song = 0;
        if ((des < 0) && (mp3_song < 0))
	    mp3_song = iso9660_dir[real_track[mp3_dir]].dir - 1;
        MP3_track();
    }
}

/* convert selection to real MP3 fileno. */
int MP3_song()
{
    int i;
    int tmp = 0;
    
    for (i=0;i<mp3_dir;i++){
	tmp += iso9660_dir[real_track[i]].dir;
    }
    tmp += (mp3_song+1);
    return(tmp);
}

/* real MP3 fileno to directory+songno.
 * 
 * NOTE: This function redraws the menu which causes audio-breaks
 *	 for MP3/WMA if not used properly. For audio files, avoid
 *	 calling this function outside play_data_file().
 */
void track_to_mp3(int track)
{
    int id;
    int reload_menu = 0;
    
    prev_dir_item = mp3_dir;
    prev_file_item = mp3_song;
    if(in_mp3_root) prev_dir_item = -1;
    in_mp3_root = 0;
    
    MP3_VBR_gain = DEF_VBR_GAIN; /* Set to default value */
    mp3_dir = 0;
    mp3_song = 0;
#ifdef DATA_CD
    id = (iso9660_file[track-1].loc)>>24;
#endif
    track--;
    while (track >= iso9660_dir[real_track[mp3_dir]].dir){
	track -= iso9660_dir[real_track[mp3_dir]].dir;
	mp3_dir++;
    }
    mp3_song = track;
    
    if(prev_dir_item != mp3_dir) reload_menu = 1;
    
    if ((id == MP3_ID)||(id == WMA_ID)) {
	if(is_jpeg || !CG_menu_on || reload_menu){
	    /*we just redraw menu when back from JPEG*/
	    mp3_menu_changed = 9; /*I just need a value > 0*/
	    CLEARALLOSD();
	    MP3_draw_box();
	}
	MP3_track();
	mp3_menu_changed = 0;
    }
}
#endif /* DATA_CD */


#ifdef HOST_SLAVE
/*******************************************************************/
/* For MP3 dics,  in Entry_state change the cussor position and    */
/* update the display Page according the global variable: mp3_song */
/* Input: mp3_song                                                 */
/* Output: cur_track_index;  mp3_dir.                              */
/*******************************************************************/
  
int haottt=0;
int temp_song_num=0, sub_sum_song_num=0;
void mp3_osd_change()
{
    unsigned char i;
    
    temp_mp3_song = mp3_song;
    haottt = mp3_song;
    
    for (i=0; i < real_track_cnt; i++) {
	sub_sum_song_num = temp_song_num;
	temp_song_num += iso9660_dir[real_track[i]].dir;
	if ((haottt-1) < temp_song_num) {
	    mp3_dir = i;   
	    haottt = haottt - sub_sum_song_num -1 ;
	    temp_song_num=0; sub_sum_song_num=0;
	    break;
	}
    }
    mp3_song = haottt;
    
    in_mp3_root=0; 
    mp3_menu_changed=1;
    MP3_draw_box();
    MP3_track();
    mp3_menu_changed=0;
}

extern int cur_track_index;
int get_track_index_from_mp3song()
{
    /* get absolute cur_track_index based on zero */
    int i, temp_number=0;
    
    for (i=0; i<mp3_dir; i++) {
	temp_number += iso9660_dir[real_track[i]].dir;
    }
    
    temp_number += mp3_song;
    cur_track_index = temp_number; 
    
    return (temp_number);
}

void mp3_osd_change_dir(int dir_id)
{
    int i, temp_absolute_num=0;
    
    mp3_dir = dir_id;  /* mp3_dir= (0 ... real_track_cnt) */
    
    for (i=0; i<real_track_cnt; i++) {
	temp_absolute_num += iso9660_dir[real_track[i]].dir;
    }
    
    cur_track_index = temp_absolute_num;
    
    mp3_song = 0;
    in_mp3_root=0; 
    mp3_menu_changed=1;
    MP3_track();
    mp3_menu_changed=0;   
}

void mp3_osd_back_root()
{
    int old_mp3_dir;
    in_mp3_root = 1; 
    
    MP3_menu();
    cur_track_index=0;
}

void mp3_osd_enter_subdir()
{
 
    mp3_song=0;
    in_mp3_root = 0;
    mp3_osd_change_dir(mp3_dir);
    mp3_song = 0;
}
#endif