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{* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*}
unit UVideoDecoderPlugin;
interface
{$IFDEF FPC}
{$MODE Delphi}
{$ENDIF}
{$I switches.inc}
uses
UMediaPlugin,
UMusic,
UPath;
type
TVideoDecoderPlugin = class(TInterfacedObject, IMediaInterface, IVideoDecoder)
private
fPluginInfo: PMediaPluginInfo;
public
constructor Create(Info: PMediaPluginInfo);
function GetName(): String;
function GetPriority(): integer;
function InitializeDecoder(): boolean;
function FinalizeDecoder: boolean;
function Open(const FileName: IPath): TVideoDecodeStream;
end;
implementation
uses
SysUtils,
Math,
ctypes,
UCommon,
UConfig,
ULog;
type
TPluginVideoDecodeStream = class (TVideoDecodeStream)
private
fVideoDecoderInfo: PVideoDecoderInfo;
fFilename: IPath;
fStream: PVideoDecodeStream;
public
constructor Create(Info: PVideoDecoderInfo);
destructor Destroy; override;
function Open(const FileName: IPath): boolean; override;
procedure Close; override;
procedure SetLoop(Enable: boolean); override;
function GetLoop(): boolean; override;
procedure SetPosition(Time: real); override;
function GetPosition: real; override;
function GetFrameWidth(): integer; override;
function GetFrameHeight(): integer; override;
function GetFrameAspect(): real; override;
function GetFrame(Time: Extended): PByteArray; override;
end;
{ TVideoDecoderPlugin }
constructor TVideoDecoderPlugin.Create(Info: PMediaPluginInfo);
begin
inherited Create();
fPluginInfo := Info;
end;
function TVideoDecoderPlugin.GetName(): String;
begin
Result := 'Plugin:VideoDecoder:' + fPluginInfo.name;
end;
function TVideoDecoderPlugin.GetPriority(): integer;
begin
Result := fPluginInfo.videoDecoder.priority;
end;
function TVideoDecoderPlugin.InitializeDecoder(): boolean;
begin
fPluginInfo.videoDecoder.init();
Result := true;
end;
function TVideoDecoderPlugin.FinalizeDecoder(): boolean;
begin
fPluginInfo.videoDecoder.finalize();
Result := true;
end;
function TVideoDecoderPlugin.Open(const FileName : IPath): TVideoDecodeStream;
var
Stream: TPluginVideoDecodeStream;
begin
Result := nil;
Stream := TPluginVideoDecodeStream.Create(fPluginInfo.videoDecoder);
if (not Stream.Open(FileName)) then
begin
Stream.Free;
Exit;
end;
Result := Stream
end;
{ TPluginVideoDecodeStream }
constructor TPluginVideoDecodeStream.Create(Info: PVideoDecoderInfo);
begin
inherited Create();
fVideoDecoderInfo := Info;
fFilename := PATH_NONE;
end;
destructor TPluginVideoDecodeStream.Destroy;
begin
Close();
inherited;
end;
function TPluginVideoDecodeStream.Open(const FileName: IPath): boolean;
begin
Result := false;
Close();
fStream := fVideoDecoderInfo.open(PChar(Filename.ToUTF8()));
if (fStream = nil) then
Exit;
fFilename := Filename;
Result := true;
end;
procedure TPluginVideoDecodeStream.Close;
begin
Self.fFilename := PATH_NONE;
if (fStream <> nil) then
begin
fVideoDecoderInfo.close(fStream);
fStream := nil;
end;
end;
function TPluginVideoDecodeStream.GetFrame(Time: Extended): PByteArray;
begin
Result := PByteArray(fVideoDecoderInfo.getFrame(fStream, Time));
end;
procedure TPluginVideoDecodeStream.SetLoop(Enable: boolean);
begin
fVideoDecoderInfo.setLoop(fStream, Enable);
end;
function TPluginVideoDecodeStream.GetLoop(): boolean;
begin
Result := fVideoDecoderInfo.getLoop(fStream);
end;
procedure TPluginVideoDecodeStream.SetPosition(Time: real);
begin
fVideoDecoderInfo.setPosition(fStream, Time);
end;
function TPluginVideoDecodeStream.GetPosition: real;
begin
Result := fVideoDecoderInfo.getPosition(fStream);
end;
function TPluginVideoDecodeStream.GetFrameWidth(): integer;
var
FrameInfo: TVideoFrameInfo;
begin
fVideoDecoderInfo.getFrameInfo(fStream, @FrameInfo);
Result := FrameInfo.width;
end;
function TPluginVideoDecodeStream.GetFrameHeight(): integer;
var
FrameInfo: TVideoFrameInfo;
begin
fVideoDecoderInfo.getFrameInfo(fStream, @FrameInfo);
Result := FrameInfo.height;
end;
function TPluginVideoDecodeStream.GetFrameAspect(): real;
var
FrameInfo: TVideoFrameInfo;
begin
fVideoDecoderInfo.getFrameInfo(fStream, @FrameInfo);
Result := FrameInfo.aspect;
end;
end.
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