dspack 如何播放流

Question

RT

Answer 1

dfm 文件源码
object Form1: TForm1
  Left = 257
  Top = 268
  BorderStyle = bsToolWindow
  Caption = 
    'DSPlayer Async StreamSource Example     ( Coder@dsplayer , www.d' +
    'splayer.de )'
  ClientHeight = 58
  ClientWidth = 477
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  OldCreateOrder = False
  Position = poScreenCenter
  OnClose = FormClose
  PixelsPerInch = 96
  TextHeight = 13
  object Button1: TButton
    Left = 16
    Top = 16
    Width = 75
    Height = 25
    Caption = 'open'
    TabOrder = 0
    OnClick = Button1Click
  end
  object Button2: TButton
    Left = 96
    Top = 16
    Width = 75
    Height = 25
    Caption = 'Play'
    TabOrder = 1
    OnClick = Button2Click
  end
  object Button3: TButton
    Left = 176
    Top = 16
    Width = 75
    Height = 25
    Caption = 'Pause'
    TabOrder = 2
    OnClick = Button3Click
  end
  object Button4: TButton
    Left = 256
    Top = 16
    Width = 75
    Height = 25
    Caption = 'Stop'
    TabOrder = 3
    OnClick = Button4Click
  end
  object Button5: TButton
    Left = 344
    Top = 16
    Width = 105
    Height = 25
    Caption = 'PropertyPage'
    TabOrder = 4
    OnClick = Button5Click
  end
  object OpenDialog1: TOpenDialog
    Left = 448
    Top = 16
  end
end
//pas 文件源码 
unit DSPlayerAsyncStreamSourceExample;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, DirectShow9, ActiveX, StdCtrls, DSUtil;type
  TForm1 = class(TForm)
    Button1: TButton;
    OpenDialog1: TOpenDialog;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
  private
    procedure NilAll();
  public
  end;IStreamLoad = interface(IUnknown) ['{3E0FA056-926C-43d9-BA18-EF16E980913B}']
   function LoadFromStream(f_Stream: TStream) : HRESULT; stdcall;
end;var
  Form1: TForm1;
  g_GraphBuilder        : IGraphBuilder         = NIL;
  g_MediaControl        : IMediaControl         = NIL;
  g_DSPlayerFileSource  : IBaseFilter           = NIL;
  g_StreamSource        : IStreamLoad           = NIL;
  g_Pin                 : IPin                  = NIL;
  g_count               : integer               = 0;
  g_FileStream          : TFileStream           = NIL;const
  CLSID_DSPlayerAsyncSource : TGUID = '{3E0FA044-926C-42d9-BA12-EF16E980913B}';
  IID_IStreamLoad           : TGUID = '{3E0FA056-926C-43d9-BA18-EF16E980913B}';
  pinID                             = 'StreamOut';
implementation{$R *.dfm}procedure TForm1.NilAll();
begin
  if Assigned(g_MediaControl)       then CheckDSError(g_MediaControl.Stop);
  if Assigned(g_Pin)                then g_Pin                  := nil;
  if Assigned(g_StreamSource)       then g_StreamSource           := nil;
  if Assigned(g_DSPlayerFileSource) then g_DSPlayerFileSource   := nil;
  if Assigned(g_MediaControl)       then g_MediaControl         := nil;
  if Assigned(g_GraphBuilder)       then g_GraphBuilder         := nil;
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  if not OpenDialog1.Execute then exit;
  NilAll;
  CheckDSError(CoCreateInstance(TGUID(CLSID_FilterGraph), NIL, CLSCTX_INPROC,
                             TGUID(IID_IGraphBuilder), g_GraphBuilder)) ;
  CheckDSError(g_GraphBuilder.QueryInterface(IID_IMediaControl, g_MediaControl));
  CheckDSError(CoCreateInstance(CLSID_DSPlayerAsyncSource,NIL, CLSCTX_INPROC,
                                 IID_IBaseFilter, g_DSPlayerFileSource));
  CheckDSError(g_DSPlayerFileSource.QueryInterface(IID_IStreamLoad,
               g_StreamSource));
  if g_FileStream <> nil then g_FileStream.Free;
  g_FileStream := TFileStream.Create(OpenDialog1.FileName, fmOpenRead);
  CheckDSError(g_StreamSource.LoadFromStream(g_FileStream));
  CheckDSError(g_DSPlayerFileSource.FindPin(pinID, g_Pin));
  CheckDSError(g_GraphBuilder.AddFilter(g_DSPlayerFileSource,
               StringToOleStr('DSPlayer Async FileSource')));
  CheckDSError(g_GraphBuilder.Render(g_Pin));
  CheckDSError(g_MediaControl.Run);
  if g_count = 0 then begin
        g_count := g_count+1;
        CheckDSError(dsutil.ShowFilterPropertyPage(0,g_DSPlayerFileSource));
  end;end;procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
 NilAll;
end;procedure TForm1.Button2Click(Sender: TObject);
begin
   if Assigned(g_MediaControl) then CheckDSError(g_MediaControl.Run);
end;procedure TForm1.Button3Click(Sender: TObject);
begin
   if Assigned(g_MediaControl) then CheckDSError(g_MediaControl.Pause);
end;procedure TForm1.Button4Click(Sender: TObject);
begin
   if Assigned(g_MediaControl) then CheckDSError(g_MediaControl.Stop);
end;procedure TForm1.Button5Click(Sender: TObject);
begin
  CheckDSError(dsutil.ShowFilterPropertyPage(0,g_DSPlayerFileSource));
end;end.