diff options
Diffstat (limited to 'src/Classes/UAudioDecoder_Bass.pas')
| -rw-r--r-- | src/Classes/UAudioDecoder_Bass.pas | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/src/Classes/UAudioDecoder_Bass.pas b/src/Classes/UAudioDecoder_Bass.pas deleted file mode 100644 index dba1fde4..00000000 --- a/src/Classes/UAudioDecoder_Bass.pas +++ /dev/null @@ -1,242 +0,0 @@ -unit UAudioDecoder_Bass; - -interface - -{$IFDEF FPC} - {$MODE Delphi} -{$ENDIF} - -{$I switches.inc} - -implementation - -uses - Classes, - SysUtils, - UMain, - UMusic, - UAudioCore_Bass, - ULog, - bass; - -type - TBassDecodeStream = class(TAudioDecodeStream) - private - Handle: HSTREAM; - FormatInfo : TAudioFormatInfo; - Error: boolean; - public - constructor Create(Handle: HSTREAM); - destructor Destroy(); override; - - 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: PChar; BufSize: integer): integer; override; - end; - -type - TAudioDecoder_Bass = class( TInterfacedObject, IAudioDecoder ) - public - function GetName: string; - - function InitializeDecoder(): boolean; - function FinalizeDecoder(): boolean; - function Open(const Filename: string): TAudioDecodeStream; - end; - -var - BassCore: TAudioCore_Bass; - - -{ TBassDecodeStream } - -constructor TBassDecodeStream.Create(Handle: HSTREAM); -var - ChannelInfo: BASS_CHANNELINFO; - Format: TAudioSampleFormat; -begin - inherited Create(); - Self.Handle := Handle; - - // setup format info - if (not BASS_ChannelGetInfo(Handle, ChannelInfo)) then - begin - raise Exception.Create('Failed to open decode-stream'); - end; - BassCore.ConvertBASSFlagsToAudioFormat(ChannelInfo.flags, Format); - FormatInfo := TAudioFormatInfo.Create(ChannelInfo.chans, ChannelInfo.freq, format); - - Error := false; -end; - -destructor TBassDecodeStream.Destroy(); -begin - Close(); - inherited; -end; - -procedure TBassDecodeStream.Close(); -begin - if (Handle <> 0) then - begin - BASS_StreamFree(Handle); - Handle := 0; - end; - PerformOnClose(); - FreeAndNil(FormatInfo); - Error := false; -end; - -function TBassDecodeStream.GetAudioFormatInfo(): TAudioFormatInfo; -begin - Result := FormatInfo; -end; - -function TBassDecodeStream.GetLength(): real; -var - bytes: QWORD; -begin - bytes := BASS_ChannelGetLength(Handle, BASS_POS_BYTE); - Result := BASS_ChannelBytes2Seconds(Handle, bytes); -end; - -function TBassDecodeStream.GetPosition: real; -var - bytes: QWORD; -begin - bytes := BASS_ChannelGetPosition(Handle, BASS_POS_BYTE); - Result := BASS_ChannelBytes2Seconds(Handle, bytes); -end; - -procedure TBassDecodeStream.SetPosition(Time: real); -var - bytes: QWORD; -begin - bytes := BASS_ChannelSeconds2Bytes(Handle, Time); - BASS_ChannelSetPosition(Handle, bytes, BASS_POS_BYTE); -end; - -function TBassDecodeStream.GetLoop(): boolean; -var - flags: DWORD; -begin - // retrieve channel flags - flags := BASS_ChannelFlags(Handle, 0, 0); - if (flags = DWORD(-1)) then - begin - Log.LogError('BASS_ChannelFlags: ' + BassCore.ErrorGetString(), 'TBassDecodeStream.GetLoop'); - Result := false; - Exit; - end; - Result := (flags and BASS_SAMPLE_LOOP) <> 0; -end; - -procedure TBassDecodeStream.SetLoop(Enabled: boolean); -var - flags: DWORD; -begin - // set/unset loop-flag - if (Enabled) then - flags := BASS_SAMPLE_LOOP - else - flags := 0; - - // set new flag-bits - if (BASS_ChannelFlags(Handle, flags, BASS_SAMPLE_LOOP) = DWORD(-1)) then - begin - Log.LogError('BASS_ChannelFlags: ' + BassCore.ErrorGetString(), 'TBassDecodeStream.SetLoop'); - Exit; - end; -end; - -function TBassDecodeStream.IsEOF(): boolean; -begin - Result := (BASS_ChannelIsActive(Handle) = BASS_ACTIVE_STOPPED); -end; - -function TBassDecodeStream.IsError(): boolean; -begin - Result := Error; -end; - -function TBassDecodeStream.ReadData(Buffer: PChar; BufSize: integer): integer; -begin - Result := BASS_ChannelGetData(Handle, Buffer, BufSize); - // check error state (do not handle EOF as error) - if ((Result = -1) and (BASS_ErrorGetCode() <> BASS_ERROR_ENDED)) then - Error := true - else - Error := false; -end; - - -{ TAudioDecoder_Bass } - -function TAudioDecoder_Bass.GetName: String; -begin - result := 'BASS_Decoder'; -end; - -function TAudioDecoder_Bass.InitializeDecoder(): boolean; -begin - BassCore := TAudioCore_Bass.GetInstance(); - Result := true; -end; - -function TAudioDecoder_Bass.FinalizeDecoder(): boolean; -begin - Result := true; -end; - -function TAudioDecoder_Bass.Open(const Filename: string): TAudioDecodeStream; -var - Stream: HSTREAM; - ChannelInfo: BASS_CHANNELINFO; - FileExt: string; -begin - Result := nil; - - // check if BASS was initialized - // in case the decoder is not used with BASS playback, init the NO_SOUND device - if ((integer(BASS_GetDevice) = -1) and (BASS_ErrorGetCode() = BASS_ERROR_INIT)) then - BASS_Init(0, 44100, 0, 0, nil); - - // TODO: use BASS_STREAM_PRESCAN for accurate seeking in VBR-files? - // disadvantage: seeking will slow down. - Stream := BASS_StreamCreateFile(False, PChar(Filename), 0, 0, BASS_STREAM_DECODE); - if (Stream = 0) then - begin - //Log.LogError(BassCore.ErrorGetString(), 'TAudioDecoder_Bass.Open'); - Exit; - end; - - // check if BASS opened some erroneously recognized file-formats - if BASS_ChannelGetInfo(Stream, channelInfo) then - begin - fileExt := ExtractFileExt(Filename); - // BASS opens FLV-files (maybe others too) although it cannot handle them. - // Setting BASS_CONFIG_VERIFY to the max. value (100000) does not help. - if ((fileExt = '.flv') and (channelInfo.ctype = BASS_CTYPE_STREAM_MP1)) then - begin - BASS_StreamFree(Stream); - Exit; - end; - end; - - Result := TBassDecodeStream.Create(Stream); -end; - - -initialization - MediaManager.Add(TAudioDecoder_Bass.Create); - -end. |