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-rw-r--r--mediaplugin/src/media/UAudioConverterPlugin.pas183
1 files changed, 183 insertions, 0 deletions
diff --git a/mediaplugin/src/media/UAudioConverterPlugin.pas b/mediaplugin/src/media/UAudioConverterPlugin.pas
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+++ b/mediaplugin/src/media/UAudioConverterPlugin.pas
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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 UAudioConverterPlugin;
+
+interface
+
+{$IFDEF FPC}
+ {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+ UMusic,
+ ULog,
+ ctypes,
+ UMediaPlugin,
+ SysUtils;
+
+type
+ TAudioConverterPlugin = class(TInterfacedObject, IAudioConverter)
+ private
+ fPluginInfo: PMediaPluginInfo;
+ public
+ constructor Create(Info: PMediaPluginInfo);
+
+ function GetName(): string;
+ function GetPriority(): integer;
+ function Init(): boolean;
+ function Finalize(): boolean;
+
+ function Open(SrcFormatInfo: TAudioFormatInfo;
+ DstFormatInfo: TAudioFormatInfo): TAudioConvertStream;
+ end;
+
+ TPluginAudioConvertStream = class(TAudioConvertStream)
+ private
+ fPluginInfo: PMediaPluginInfo;
+ fAudioConverter: PAudioConverterInfo;
+ fStream: PAudioConvertStream;
+ function Init(): boolean;
+ protected
+ constructor Create(SrcFormatInfo: TAudioFormatInfo;
+ DstFormatInfo: TAudioFormatInfo);
+ public
+ destructor Destroy(); override;
+
+ class function Open(SrcFormatInfo: TAudioFormatInfo;
+ DstFormatInfo: TAudioFormatInfo): TPluginAudioConvertStream;
+
+ function Convert(InputBuffer: PByteArray; OutputBuffer: PByteArray; var InputSize: integer): integer; override;
+ function GetOutputBufferSize(InputSize: integer): integer; override;
+ function GetRatio(): double; override;
+ end;
+
+implementation
+
+{ TAudioConverterPlugin }
+
+constructor TAudioConverterPlugin.Create(Info: PMediaPluginInfo);
+begin
+ inherited Create();
+ fPluginInfo := Info;
+end;
+
+function TAudioConverterPlugin.GetName(): string;
+begin
+ Result := 'Plugin:AudioConverter:' + fPluginInfo.name;
+end;
+
+function TAudioConverterPlugin.GetPriority(): integer;
+begin
+ Result := fPluginInfo.audioDecoder.priority;
+end;
+
+function TAudioConverterPlugin.Init(): boolean;
+begin
+ //fPluginInfo.initialize();
+ Result := true;
+end;
+
+function TAudioConverterPlugin.Finalize(): boolean;
+begin
+ //fPluginInfo.finalize();
+ Result := true;
+end;
+
+function TAudioConverterPlugin.Open(SrcFormatInfo: TAudioFormatInfo;
+ DstFormatInfo: TAudioFormatInfo): TAudioConvertStream;
+begin
+ Result := TPluginAudioConvertStream.Open(SrcFormatInfo, DstFormatInfo);
+end;
+
+{ TAudioConverterPlugin }
+
+constructor TPluginAudioConvertStream.Create(SrcFormatInfo: TAudioFormatInfo;
+ DstFormatInfo: TAudioFormatInfo);
+begin
+ inherited Create(SrcFormatInfo, DstFormatInfo);
+end;
+
+destructor TPluginAudioConvertStream.Destroy();
+begin
+ if (fStream <> nil) then
+ fAudioConverter.close(fStream);
+ inherited;
+end;
+
+class function TPluginAudioConvertStream.Open(SrcFormatInfo: TAudioFormatInfo;
+ DstFormatInfo: TAudioFormatInfo): TPluginAudioConvertStream;
+var
+ Stream: TPluginAudioConvertStream;
+begin
+ Result := nil;
+ Stream := TPluginAudioConvertStream.Create(SrcFormatInfo, DstFormatInfo);
+ if (not Stream.Init()) then
+ begin
+ Stream.Free;
+ Exit;
+ end;
+ Result := Stream;
+end;
+
+function TPluginAudioConvertStream.Init(): boolean;
+var
+ CSrcFormatInfo: TCAudioFormatInfo;
+ CDstFormatInfo: TCAudioFormatInfo;
+begin
+ Result := false;
+ fAudioConverter := fPluginInfo.audioConverter;
+
+ AudioFormatInfoToCStruct(SrcFormatInfo, CSrcFormatInfo);
+ AudioFormatInfoToCStruct(DstFormatInfo, CDstFormatInfo);
+ fStream := fAudioConverter.open(@CSrcFormatInfo, @CDstFormatInfo);
+ if (fStream = nil) then
+ begin
+ Log.LogError('fAudioConverter.open() failed', 'TAudioConverterPlugin.Init');
+ Exit;
+ end;
+
+ Result := true;
+end;
+
+function TPluginAudioConvertStream.Convert(InputBuffer: PByteArray; OutputBuffer: PByteArray; var InputSize: integer): integer;
+begin
+ Result := fAudioConverter.convert(fStream,
+ PCuint8(InputBuffer), PCuint8(OutputBuffer), @InputSize);
+end;
+
+function TPluginAudioConvertStream.GetOutputBufferSize(InputSize: integer): integer;
+begin
+ Result := fAudioConverter.getOutputBufferSize(fStream, InputSize);
+end;
+
+function TPluginAudioConvertStream.GetRatio(): double;
+begin
+ Result := fAudioConverter.getRatio(fStream);
+end;
+
+end. \ No newline at end of file