From bcc621273f11809ef5fde933e926735692e7f3de Mon Sep 17 00:00:00 2001 From: tobigun Date: Mon, 1 Nov 2010 21:22:53 +0000 Subject: renamed SDL specific interface UAudioConverter.pas to UAudioConverter_SDL.pas git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2702 b956fd51-792f-4845-bead-9b4dfca2ff2c --- mediaplugin/src/media/UAudioConverter.pas | 212 ------------------------------ 1 file changed, 212 deletions(-) delete mode 100644 mediaplugin/src/media/UAudioConverter.pas (limited to 'mediaplugin/src/media/UAudioConverter.pas') diff --git a/mediaplugin/src/media/UAudioConverter.pas b/mediaplugin/src/media/UAudioConverter.pas deleted file mode 100644 index 343d0742..00000000 --- a/mediaplugin/src/media/UAudioConverter.pas +++ /dev/null @@ -1,212 +0,0 @@ -{* 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 UAudioConverter; - -interface - -{$IFDEF FPC} - {$MODE Delphi} -{$ENDIF} - -{$I switches.inc} - -uses - UMusic, - ULog, - UMediaPlugin, - UMediaCore_SDL, - sdl, - SysUtils, - Math; - -type - TAudioConverter_SDL = class(TInterfacedObject, IAudioConverter) - public - function GetName(): string; - function GetPriority(): integer; - function Init(): boolean; - function Finalize(): boolean; - - function Open(SrcFormatInfo: TAudioFormatInfo; - DstFormatInfo: TAudioFormatInfo): TAudioConvertStream; - end; - - TAudioConvertStream_SDL = class(TAudioConvertStream) - private - cvt: TSDL_AudioCVT; - function Init(): boolean; - protected - constructor Create(SrcFormatInfo: TAudioFormatInfo; - DstFormatInfo: TAudioFormatInfo); - public - destructor Destroy(); override; - - class function Open(SrcFormatInfo: TAudioFormatInfo; - DstFormatInfo: TAudioFormatInfo): TAudioConvertStream_SDL; - - function Convert(InputBuffer: PByteArray; OutputBuffer: PByteArray; var InputSize: integer): integer; override; - function GetOutputBufferSize(InputSize: integer): integer; override; - function GetRatio(): double; override; - end; - -implementation - -{ TAudioConverter_SDL } - -function TAudioConverter_SDL.GetName(): string; -begin - Result := 'AudioConverter_SDL'; -end; - -function TAudioConverter_SDL.GetPriority(): integer; -begin - {* Notes: - * - 44.1kHz to 48kHz conversion or vice versa is not supported - * by SDL 1.2 (will be introduced in 1.3). - * No conversion takes place in this cases. - * This is because SDL just converts differences in powers of 2. - * So the result might not be that accurate. - * This IS audible (voice to high/low) and it needs good synchronization - * with the video or the lyrics timer. - * - float<->int16 conversion is not supported (will be part of 1.3) and - * SDL (<1.3) is not capable of handling floats at all. - * -> Using FFmpeg or libsamplerate for resampling is preferred. - * Use SDL for channel and format conversion only. - *} - Result := 0; -end; - -function TAudioConverter_SDL.Init(): boolean; -begin - Result := true; -end; - -function TAudioConverter_SDL.Finalize(): boolean; -begin - Result := true; -end; - -function TAudioConverter_SDL.Open(SrcFormatInfo: TAudioFormatInfo; - DstFormatInfo: TAudioFormatInfo): TAudioConvertStream; -begin - Result := TAudioConvertStream_SDL.Open(SrcFormatInfo, DstFormatInfo); -end; - -{ TAudioConvertStream_SDL } - -constructor TAudioConvertStream_SDL.Create(SrcFormatInfo: TAudioFormatInfo; - DstFormatInfo: TAudioFormatInfo); -begin - inherited Create(SrcFormatInfo, DstFormatInfo); -end; - -destructor TAudioConvertStream_SDL.Destroy(); -begin - inherited; -end; - -class function TAudioConvertStream_SDL.Open(SrcFormatInfo: TAudioFormatInfo; - DstFormatInfo: TAudioFormatInfo): TAudioConvertStream_SDL; -var - Stream: TAudioConvertStream_SDL; -begin - Result := nil; - Stream := TAudioConvertStream_SDL.Create(SrcFormatInfo, DstFormatInfo); - if (not Stream.Init()) then - begin - Stream.Free; - Exit; - end; - Result := Stream; -end; - -function TAudioConvertStream_SDL.Init(): boolean; -var - srcFormat: UInt16; - dstFormat: UInt16; -begin - Result := false; - - if (not ConvertAudioFormatToSDL(srcFormatInfo.Format, srcFormat) or - not ConvertAudioFormatToSDL(dstFormatInfo.Format, dstFormat)) then - begin - Log.LogError('Audio-format not supported by SDL', 'TSoftMixerPlaybackStream.InitFormatConversion'); - Exit; - end; - - if (SDL_BuildAudioCVT(@cvt, - srcFormat, srcFormatInfo.Channels, Round(srcFormatInfo.SampleRate), - dstFormat, dstFormatInfo.Channels, Round(dstFormatInfo.SampleRate)) = -1) then - begin - Log.LogError(SDL_GetError(), 'TSoftMixerPlaybackStream.InitFormatConversion'); - Exit; - end; - - Result := true; -end; - -(* - * Returns the size of the output buffer. This might be bigger than the actual - * size of resampled audio data. - *) -function TAudioConvertStream_SDL.GetOutputBufferSize(InputSize: integer): integer; -begin - // Note: len_ratio must not be used here. Even if the len_ratio is 1.0, len_mult might be 2. - // Example: 44.1kHz/mono to 22.05kHz/stereo -> len_ratio=1, len_mult=2 - Result := InputSize * cvt.len_mult; -end; - -function TAudioConvertStream_SDL.GetRatio(): double; -begin - Result := cvt.len_ratio; -end; - -function TAudioConvertStream_SDL.Convert(InputBuffer: PByteArray; OutputBuffer: PByteArray; var InputSize: integer): integer; -begin - Result := -1; - - if (InputSize <= 0) then - begin - // avoid div-by-zero problems - if (InputSize = 0) then - Result := 0; - Exit; - end; - - // OutputBuffer is always bigger than or equal to InputBuffer - Move(InputBuffer[0], OutputBuffer[0], InputSize); - cvt.buf := PUint8(OutputBuffer); - cvt.len := InputSize; - if (SDL_ConvertAudio(@cvt) = -1) then - Exit; - - Result := cvt.len_cvt; -end; - -initialization - MediaManager.add(TAudioConverter_SDL.Create); - -end. \ No newline at end of file -- cgit v1.2.3