From 23ecb0a01dad716af22476851ac383cb904d0aaa Mon Sep 17 00:00:00 2001 From: tobigun Date: Sat, 30 Oct 2010 07:46:35 +0000 Subject: audio/video decoder filenames adjusted git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2697 b956fd51-792f-4845-bead-9b4dfca2ff2c --- mediaplugin/src/media/UAudioDecoderPlugin.pas | 242 ++++++++++++++++++++++++++ 1 file changed, 242 insertions(+) create mode 100644 mediaplugin/src/media/UAudioDecoderPlugin.pas (limited to 'mediaplugin/src/media/UAudioDecoderPlugin.pas') diff --git a/mediaplugin/src/media/UAudioDecoderPlugin.pas b/mediaplugin/src/media/UAudioDecoderPlugin.pas new file mode 100644 index 00000000..8298cf17 --- /dev/null +++ b/mediaplugin/src/media/UAudioDecoderPlugin.pas @@ -0,0 +1,242 @@ +{* 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 UAudioDecoderPlugin; + +(******************************************************************************* + * + * This unit is primarily based upon - + * http://www.dranger.com/ffmpeg/ffmpegtutorial_all.html + * + * and tutorial03.c + * + * http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html + * + *******************************************************************************) + +interface + +{$IFDEF FPC} + {$MODE Delphi} +{$ENDIF} + +{$I switches.inc} + +uses + UMediaPlugin, + UMusic, + UPath; + +type + TAudioDecoderPlugin = class(TInterfacedObject, IAudioDecoder) + private + fPluginInfo: PMediaPluginInfo; + public + constructor Create(Info: PMediaPluginInfo); + + function GetName: string; + + function InitializeDecoder(): boolean; + function FinalizeDecoder(): boolean; + function Open(const Filename: IPath): TAudioDecodeStream; + end; + +implementation + +uses + ctypes, + Classes, + SysUtils, + UIni, + UMain, + ULog; + +type + TPluginAudioDecodeStream = class(TAudioDecodeStream) + private + fAudioDecoderInfo: PAudioDecoderInfo; + fFilename: IPath; + fStream: PAudioDecodeStream; + fFormatInfo: TAudioFormatInfo; + + public + constructor Create(Info: PAudioDecoderInfo); + destructor Destroy(); override; + + function Open(const Filename: IPath): boolean; + procedure Close(); override; + + function GetLength(): real; override; + function GetAudioFormatInfo(): TAudioFormatInfo; override; + function GetPosition: real; override; + procedure SetPosition(Time: real); override; + function GetLoop(): boolean; override; + procedure SetLoop(Enabled: boolean); override; + function IsEOF(): boolean; override; + function IsError(): boolean; override; + + function ReadData(Buffer: PByteArray; BufferSize: integer): integer; override; + end; + +{ TPluginAudioDecodeStream } + +constructor TPluginAudioDecodeStream.Create(Info: PAudioDecoderInfo); +begin + inherited Create(); + fAudioDecoderInfo := Info; + fFilename := PATH_NONE; +end; + +{* + * Frees the decode-stream data. + *} +destructor TPluginAudioDecodeStream.Destroy(); +begin + Close(); + inherited; +end; + +function TPluginAudioDecodeStream.Open(const Filename: IPath): boolean; +var + Info: TCAudioFormatInfo; +begin + Result := false; + + Close(); + + fStream := fAudioDecoderInfo.open(PChar(Filename.ToUTF8())); + if (fStream = nil) then + Exit; + + fFilename := Filename; + + fAudioDecoderInfo.getAudioFormatInfo(fStream, Info); + fFormatInfo := TAudioFormatInfo.Create( + Info.channels, + Info.sampleRate, + TAudioSampleFormat(Info.format) + ); + + Result := true; +end; + +procedure TPluginAudioDecodeStream.Close(); +begin + Self.fFilename := PATH_NONE; + if (fStream <> nil) then + begin + fAudioDecoderInfo.close(fStream); + fStream := nil; + end; +end; + +function TPluginAudioDecodeStream.GetLength(): real; +begin + Result := fAudioDecoderInfo.getLength(fStream); +end; + +function TPluginAudioDecodeStream.GetAudioFormatInfo(): TAudioFormatInfo; +begin + Result := fFormatInfo; +end; + +function TPluginAudioDecodeStream.IsEOF(): boolean; +begin + Result := fAudioDecoderInfo.isEOF(fStream); +end; + +function TPluginAudioDecodeStream.IsError(): boolean; +begin + Result := fAudioDecoderInfo.isError(fStream); +end; + +function TPluginAudioDecodeStream.GetPosition(): real; +begin + Result := fAudioDecoderInfo.getPosition(fStream); +end; + +procedure TPluginAudioDecodeStream.SetPosition(Time: real); +begin + fAudioDecoderInfo.setPosition(fStream, Time); +end; + +function TPluginAudioDecodeStream.GetLoop(): boolean; +begin + Result := fAudioDecoderInfo.getLoop(fStream); +end; + +procedure TPluginAudioDecodeStream.SetLoop(Enabled: boolean); +begin + fAudioDecoderInfo.setLoop(fStream, Enabled); +end; + +function TPluginAudioDecodeStream.ReadData(Buffer: PByteArray; BufferSize: integer): integer; +begin + Result := fAudioDecoderInfo.readData(fStream, PCUint8(Buffer), BufferSize); +end; + + +{ TAudioDecoderPlugin } + +constructor TAudioDecoderPlugin.Create(Info: PMediaPluginInfo); +begin + inherited Create(); + fPluginInfo := Info; +end; + +function TAudioDecoderPlugin.GetName: String; +begin + Result := 'Plugin:AudioDecoder:' + fPluginInfo.name; +end; + +function TAudioDecoderPlugin.InitializeDecoder: boolean; +begin + //fPluginInfo.initialize(); + Result := true; +end; + +function TAudioDecoderPlugin.FinalizeDecoder(): boolean; +begin + //fPluginInfo.finalize(); + Result := true; +end; + +function TAudioDecoderPlugin.Open(const Filename: IPath): TAudioDecodeStream; +var + Stream: TPluginAudioDecodeStream; +begin + Result := nil; + + Stream := TPluginAudioDecodeStream.Create(fPluginInfo.audioDecoder); + if (not Stream.Open(Filename)) then + begin + Stream.Free; + Exit; + end; + + Result := Stream; +end; + +end. -- cgit v1.2.3