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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, IMediaInterface, 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
fAudioConverter: PAudioConverterInfo;
fStream: PAudioConvertStream;
function Init(): boolean;
public
// Do not call this directly, use Open() instead
constructor Create(Info: PAudioConverterInfo;
SrcFormatInfo: TAudioFormatInfo;
DstFormatInfo: TAudioFormatInfo);
destructor Destroy(); override;
class function Open(Info: PAudioConverterInfo;
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.audioConverter.priority;
end;
function TAudioConverterPlugin.Init(): boolean;
begin
fPluginInfo.audioConverter.init();
Result := true;
end;
function TAudioConverterPlugin.Finalize(): boolean;
begin
fPluginInfo.audioConverter.finalize();
Result := true;
end;
function TAudioConverterPlugin.Open(SrcFormatInfo: TAudioFormatInfo;
DstFormatInfo: TAudioFormatInfo): TAudioConvertStream;
begin
Result := TPluginAudioConvertStream.Open(
fPluginInfo.audioConverter,
SrcFormatInfo, DstFormatInfo);
end;
{ TAudioConverterPlugin }
constructor TPluginAudioConvertStream.Create(
Info: PAudioConverterInfo;
SrcFormatInfo: TAudioFormatInfo;
DstFormatInfo: TAudioFormatInfo);
begin
inherited Create(SrcFormatInfo, DstFormatInfo);
fAudioConverter := Info;
end;
destructor TPluginAudioConvertStream.Destroy();
begin
if (fStream <> nil) then
fAudioConverter.close(fStream);
inherited;
end;
class function TPluginAudioConvertStream.Open(
Info: PAudioConverterInfo;
SrcFormatInfo: TAudioFormatInfo;
DstFormatInfo: TAudioFormatInfo): TPluginAudioConvertStream;
var
Stream: TPluginAudioConvertStream;
begin
Result := nil;
Stream := TPluginAudioConvertStream.Create(Info, 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;
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.
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