just a first experimental version

git-svn-id: svn://svn.code.sf.net/p/ultrastardx/svn/branches/experimental@2011 b956fd51-792f-4845-bead-9b4dfca2ff2c

1 files changed, 160 insertions, 0 deletions

diff --git a/Medley/src/media/UAudioCore_Bass.pas b/Medley/src/media/UAudioCore_Bass.pas
new file mode 100644
index 00000000..197f9760
--- /dev/null
+++ b/Medley/src/media/UAudioCore_Bass.pas
@@ -0,0 +1,160 @@
+{* 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 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 CheckVersion(): boolean;
+      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;
+
+const
+  // TODO: 2.4.2 is not ABI compatible with older versions
+  // as (BASS_RECORDINFO.driver was removed)
+  //BASS_MIN_REQUIRED_VERSION = $02040201;
+  BASS_MIN_REQUIRED_VERSION = $02000000;
+
+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.CheckVersion(): boolean;
+begin
+  Result := BASS_GetVersion() >= BASS_MIN_REQUIRED_VERSION;
+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.