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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 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;
private
function DecodeVersion(VersionHex: integer): string;
end;
implementation
uses
UMain,
ULog;
const
// BASS 2.4.2 is not ABI compatible with older versions
// as (BASS_RECORDINFO.driver was removed)
BASS_MIN_REQUIRED_VERSION = $02040201;
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.DecodeVersion(VersionHex: integer): string;
var
Version: array [0..3] of integer;
begin
Version[0] := (VersionHex shr 24) and $FF;
Version[1] := (VersionHex shr 16) and $FF;
Version[2] := (VersionHex shr 8) and $FF;
Version[3] := (VersionHex shr 0) and $FF;
Result := Format('%x.%x.%x.%x', [Version[0], Version[1], Version[2], Version[3]]);
end;
function TAudioCore_Bass.CheckVersion(): boolean;
begin
Result := BASS_GetVersion() >= BASS_MIN_REQUIRED_VERSION;
if (not Result) then
begin
Log.LogWarn('Could not init BASS audio library. ''bass.dll'' version is ' + DecodeVersion(BASS_GetVersion()) + ' but ' + DecodeVersion(BASS_MIN_REQUIRED_VERSION) + ' or higher is required.',
'TAudioCore_Bass.CheckVersion');
end;
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.
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