1 files changed, 123 insertions, 0 deletions
diff --git a/src/Classes/UAudioCore_Bass.pas b/src/Classes/UAudioCore_Bass.pas
new file mode 100644
index 00000000..beb2db16
--- /dev/null
+++ b/src/Classes/UAudioCore_Bass.pas
@@ -0,0 +1,123 @@
+unit UAudioCore_Bass;
+
+interface
+
+{$IFDEF FPC}
+  {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+  Classes,
+  SysUtils,
+  UMusic,
+  bass;     // (Note: DWORD is defined here)
+
+type
+  TAudioCore_Bass = class
+    public
+      constructor Create();
+      class function GetInstance(): TAudioCore_Bass;
+      function ErrorGetString(): string; overload;
+      function ErrorGetString(errCode: integer): string; overload;
+      function ConvertAudioFormatToBASSFlags(Format: TAudioSampleFormat; out Flags: DWORD): boolean;
+      function ConvertBASSFlagsToAudioFormat(Flags: DWORD; out Format: TAudioSampleFormat): boolean;
+  end;
+
+implementation
+
+uses
+  UMain,
+  ULog;
+
+var
+  Instance: TAudioCore_Bass;
+
+constructor TAudioCore_Bass.Create();
+begin
+  inherited;
+end;
+
+class function TAudioCore_Bass.GetInstance(): TAudioCore_Bass;
+begin
+  if (not Assigned(Instance)) then
+    Instance := TAudioCore_Bass.Create();
+  Result := Instance;
+end;
+
+function TAudioCore_Bass.ErrorGetString(): string;
+begin
+  Result := ErrorGetString(BASS_ErrorGetCode());
+end;
+
+function TAudioCore_Bass.ErrorGetString(errCode: integer): string;
+begin
+  case errCode of
+    BASS_OK:             result := 'No error';
+    BASS_ERROR_MEM:      result := 'Insufficient memory';
+    BASS_ERROR_FILEOPEN: result := 'File could not be opened';
+    BASS_ERROR_DRIVER:   result := 'Device driver not available';
+    BASS_ERROR_BUFLOST:  result := 'Buffer lost';
+    BASS_ERROR_HANDLE:   result := 'Invalid Handle';
+    BASS_ERROR_FORMAT:   result := 'Sample-Format not supported';
+    BASS_ERROR_POSITION: result := 'Illegal position';
+    BASS_ERROR_INIT:     result := 'BASS_Init has not been successfully called';
+    BASS_ERROR_START:    result := 'Paused/stopped';
+    BASS_ERROR_ALREADY:  result := 'Already created/used';
+    BASS_ERROR_NOCHAN:   result := 'No free channels';
+    BASS_ERROR_ILLTYPE:  result := 'Type is invalid';
+    BASS_ERROR_ILLPARAM: result := 'Illegal parameter';
+    BASS_ERROR_NO3D:     result := 'No 3D support';
+    BASS_ERROR_NOEAX:    result := 'No EAX support';
+    BASS_ERROR_DEVICE:   result := 'Invalid device number';
+    BASS_ERROR_NOPLAY:   result := 'Channel not playing';
+    BASS_ERROR_FREQ:     result := 'Freq out of range';
+    BASS_ERROR_NOTFILE:  result := 'Not a file stream';
+    BASS_ERROR_NOHW:     result := 'No hardware support';
+    BASS_ERROR_EMPTY:    result := 'Is empty';
+    BASS_ERROR_NONET:    result := 'Network unavailable';
+    BASS_ERROR_CREATE:   result := 'Creation error';
+    BASS_ERROR_NOFX:     result := 'DX8 effects unavailable';
+    BASS_ERROR_NOTAVAIL: result := 'Not available';
+    BASS_ERROR_DECODE:   result := 'Is a decoding channel';
+    BASS_ERROR_DX:       result := 'Insufficient version of DirectX';
+    BASS_ERROR_TIMEOUT:  result := 'Timeout';
+    BASS_ERROR_FILEFORM: result := 'File-Format not recognised/supported';
+    BASS_ERROR_SPEAKER:  result := 'Requested speaker(s) not support';
+    BASS_ERROR_VERSION:  result := 'Version error';
+    BASS_ERROR_CODEC:    result := 'Codec not available/supported';
+    BASS_ERROR_ENDED:    result := 'The channel/file has ended';
+    BASS_ERROR_UNKNOWN:  result := 'Unknown error';
+    else                 result := 'Unknown error';
+  end;
+end;
+
+function TAudioCore_Bass.ConvertAudioFormatToBASSFlags(Format: TAudioSampleFormat; out Flags: DWORD): boolean;
+begin
+  case Format of
+    asfS16:   Flags := 0;
+    asfFloat: Flags := BASS_SAMPLE_FLOAT;
+    asfU8:    Flags := BASS_SAMPLE_8BITS;
+    else begin
+      Result := false;
+      Exit;
+    end;
+  end;
+
+  Result := true;
+end;
+
+function TAudioCore_Bass.ConvertBASSFlagsToAudioFormat(Flags: DWORD; out Format: TAudioSampleFormat): boolean;
+begin
+  if ((Flags and BASS_SAMPLE_FLOAT) <> 0) then
+    Format := asfFloat
+  else if ((Flags and BASS_SAMPLE_8BITS) <> 0) then
+    Format := asfU8
+  else
+    Format := asfS16;
+
+  Result := true;
+end;
+
+end.