DirextX编程

开发平台：
Delphi

PlayList.~pas：源码内容
							unit PlayList;
interface
uses Windows, Classes, Messages, SysUtils, Forms, SyncObjs, WHPlaySDK, Math, ComCtrls, StrUtils,
    ActiveX;
Const
  WM_ADDITEM=WM_USER+1008;
Type
    TPlayType=(ptAdd,ptPlay);
    TFileType=(ftUnknown,ftLock,ftUnLock);
    PPlayFileInfo=^TPlayFileInfo;
    TPlayFileInfo=record
        FileName:String;
        DisplayName:String;
        FileSize:Single;
        MediaInfo:TMediaInfo;
        bExists:Boolean;
        bLock:Boolean;
        FileType:TFileType;
        PlayType:TPlayType;
        Pos:Integer;
    end;
    TOnReadyEnd=procedure (Sender:TObject; PlayInfo:PPlayFileInfo; Item:TListItem) of Object;
    TPlayListManager=Class
    private
        FFileName:String;
        FOnReadyEnd: TOnReadyEnd;
        PlayInfoThread:TThread;
        List:TList;
        procedure SetOnReadyEnd(const Value: TOnReadyEnd);
    protected
        ListView:TListView;
        Lock:TCriticalSection;
        Event:TSimpleEvent;
        function GetPlayFileInfo:PPlayFileInfo;
        procedure Add(Info:PPlayFileInfo);overload;
    public
        Constructor Create(ListView:TListView; MsgHandle:THandle);
        Destructor Destroy;override;
        procedure Open(FileName:String; IsAppend:Boolean=true; IsPlay:Boolean=false);
        procedure Save(FileName:String; CurData:TListItem);
        procedure SaveAs(FileName:String);
        procedure Add(FileName:String; FileType:TFileType; PlayType:TPlayType; Pos:Integer=0);overload;
        procedure Delete(Item: TListItem);
        procedure Clear;
        property OnReadyEnd:TOnReadyEnd read FOnReadyEnd write SetOnReadyEnd;
        property FileName:String read FFileName;
    end;
procedure GetTimeString(iHours,iMinutes,iSeconds:Integer; var Hours,Minutes,Seconds:String);
implementation
procedure GetTimeString(iHours,iMinutes,iSeconds:Integer; var Hours,Minutes,Seconds:String);
begin
    if iHours=0 then
        Hours:='00'
    else
    begin
        Hours:=IntToStr(iHours);
        if Length(Hours)=1 then
             Hours:='0'+Hours;
    end;
    if iMinutes=0 then
        Minutes:='00'
    else
    begin
        Minutes:=IntToStr(iMinutes);
        if Length(Minutes)=1 then
             Minutes:='0'+Minutes;
    end;
    if iSeconds=0 then
        Seconds:='00'
    else
    begin
        Seconds:=IntToStr(iSeconds);
        if Length(Seconds)=1 then
             Seconds:='0'+Seconds;
    end;
end;
{ TPlayListManager }
Type
    TPlayInfoThread=Class(TThread)
    private
        MsgHandle:THandle;
        Info:PPlayFileInfo;
        Owner:TPlayListManager;
        procedure DoUpdate;
    protected
        procedure Execute;override;
    public
        Constructor Create(Owner:TPlayListManager; MsgHandle:THandle);
    end;
procedure TPlayListManager.Add(FileName: String; FileType:TFileType; PlayType:TPlayType; Pos:Integer);
Var
    Info:PPlayFileInfo;
begin
    Lock.Acquire;
    Try
        New(Info);
        Info.FileName:=FileName;
        Info.FileType:=FileType;
        Info.PlayType:=PlayType;
        Info.Pos:=Pos;
        List.Add(Info);
        Event.SetEvent;
    Finally
        Lock.Release;
    end;
end;
procedure TPlayListManager.Add(Info: PPlayFileInfo);
begin
    Lock.Acquire;
    Try
        Event.SetEvent;
        List.Add(Info);
    Finally
        Lock.Release;
    end;
end;
procedure TPlayListManager.Clear;
Var
    i:Integer;
begin
    Lock.Acquire;
    Try
        For i:=0 to List.Count-1 do
        begin
            Dispose(PPlayFileInfo(List.Items[i]));
        end;
        List.Clear;
    Finally
        Lock.Release;
    end;
end;
constructor TPlayListManager.Create(ListView:TListView; MsgHandle:THandle);
begin
    Self.ListView:=ListView;
    Event:=TSimpleEvent.Create;
    Lock:=TCriticalSection.Create;
    PlayInfoThread:=TPlayInfoThread.Create(Self,MsgHandle);
    List:=TList.Create;
end;
procedure TPlayListManager.Delete(Item:TListItem);
begin
    Dispose(PPlayFileInfo(Item.Data));
    Item.Delete;
end;
destructor TPlayListManager.Destroy;
begin
    Clear;
    PlayInfoThread.Terminate;
    Event.SetEvent;
    PlayInfoThread.WaitFor;
    PlayInfoThread.Free;
    Event.Free;
    Lock.Free;
    List.Free;
    inherited;
end;
function TPlayListManager.GetPlayFileInfo: PPlayFileInfo;
begin
    Result:=nil;
    if List.Count>0 then
    begin
        Result:=List.Items[0];
        List.Delete(0);
    end
    else
        Event.ResetEvent;
end;
procedure TPlayListManager.Open(FileName: String; IsAppend: Boolean; IsPlay:Boolean);
Var
    i,Sel:Integer;
    Info:PPlayFileInfo;
    StrList:TStringList;
    ValList:TStringList;
begin
    StrList:=TStringList.Create;
    ValList:=TStringList.Create;
    Try
        StrList.LoadFromFile(FileName);
        if StrList.Count=0 then
            Exit;
        if Not IsAppend then
            FFileName:=FileName;
        if StrList.Strings[0]='!@#$%^&*(WH)' then
            Sel:=StrToInt(StrList.Strings[1])
        else
            Sel:=0;
        For i:=2 to StrList.Count-1 do
        begin
            New(Info);
            Info.FileName:='';
            Info.DisplayName:='';
            if IsPlay and (i=Sel) then
                Info.PlayType:=ptPlay
            else
                Info.PlayType:=ptAdd;
            Info.Pos:=0;
            if StrList.Strings[0]='!@#$%^&*(WH)' then
            begin
                ValList.Text:=AnsiReplaceStr(StrList.Strings[i],',',#13#10);
                Info.FileName:=ValList.Strings[0];
                Info.DisplayName:=ValList.Strings[1];
            end
            else
                Info.FileName:=StrList.Strings[i];
            Self.Add(Info);
        end;
    Finally
        ValList.Free;
        StrList.Free;
    end;
end;
procedure TPlayListManager.Save(FileName: String; CurData:TListItem);
Var
    i:Integer;
    Info:PPlayFileInfo;
    StrList:TStringList;
begin
    StrList:=TStringList.Create;
    Try
        FFileName:=FileName;
        StrList.Add('!@#$%^&*(WH)');
        StrList.Add('0');
        For i:=0 to ListView.Items.Count-1 do
        begin
            if ListView.Items[i]=CurData then
            begin
                StrList.Strings[1]:=IntToStr(i+2);
            end;
            Info:=ListView.Items[i].Data;
            StrList.Add(Info.FileName+','+Info.DisplayName);
        end;
        StrList.SaveToFile(FileName); 
    Finally
        StrList.Free;
    end;
end;
procedure TPlayListManager.SaveAs(FileName: String);
Var
    i:Integer;
    Info:PPlayFileInfo;
    StrList:TStringList;
begin
    StrList:=TStringList.Create;
    Try
        For i:=0 to ListView.Items.Count-1 do
        begin
            Info:=ListView.Items[i].Data;
            StrList.Add(Info.FileName);
        end;
        StrList.SaveToFile(FileName);
    Finally
        StrList.Free;
    end;
end;
procedure TPlayListManager.SetOnReadyEnd(const Value: TOnReadyEnd);
begin
    FOnReadyEnd := Value;
end;
{ TPlayInfoThread }
constructor TPlayInfoThread.Create(Owner:TPlayListManager; MsgHandle:THandle);
begin
    Inherited Create(true);
    Self.Owner:=Owner;
    Self.FreeOnTerminate:=false;
    Self.MsgHandle:=MsgHandle;
    Self.Resume;
end;
procedure TPlayInfoThread.DoUpdate;
begin
    PostMessage(MsgHandle,WM_ADDITEM,Integer(Info),0);
end;
procedure TPlayInfoThread.Execute;
Var
    FileStream:TFileStream;
    vInfo:PPlayFileInfo;
begin
    ActiveX.CoInitialize(nil);
    Try
        While Not (Application.Terminated or Terminated) do
        begin
            Owner.Event.WaitFor(INFINITE);
            if Application.Terminated or Terminated then
                Exit;
            Info:=nil;
            Owner.Lock.Acquire;
            Try
                vInfo:=Owner.GetPlayFileInfo;
                if Assigned(vInfo) then
                begin
                    New(Info);
                    Info^:=vInfo^;
                    Dispose(vInfo);
                end;
            Finally
                Owner.Lock.Release;
            end;
            if Not Assigned(Info) then
                Continue;
            Info.bExists:=FileExists(Info.FileName);
            Case Info.FileType of
                ftUnKnown:Info.bLock:=IsLockFile(Info.FileName);
                ftLock:Info.bLock:=true;
                ftUnLock:Info.bLock:=false;
            end;
            FillChar(Info.MediaInfo,sizeof(Info.MediaInfo),0);
            if Info.bLock then
            //    dllGetLockMediaInfo(PChar(Info.FileName),@Info.MediaInfo)
            else
                dllGetNoLockMediaInfo(PChar(Info.FileName),@Info.MediaInfo);
            FileStream:=TFileStream.Create(Info.FileName,fmOpenRead or fmShareDenyNone);
            Try
                Info.FileSize:=RoundTo(FileStream.Size div (1024*1024),-2);
            Finally
                FileStream.Free;
                FileStream:=nil;
            end;
            if Info.DisplayName='' then
                Info.DisplayName:=ChangeFileExt(ExtractFileName(Info.FileName),'');
            Info.MediaInfo.PlayHours:=Info.MediaInfo.PlayMinites div 60;
            Info.MediaInfo.PlayMinites:=Info.MediaInfo.PlayMinites mod 60;
            DoUpdate;
        end;
    Finally
        ActiveX.CoUninitialize;
    end;
end;
end.

						