src/engine/helix/helix-sp/gain.h

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  *
   3  * This software is released under the provisions of the GPL version 2.
   4  * see file "COPYING".  If that file is not available, the full statement
   5  * of the license can be found at
   6  *
   7  * http://www.fsf.org/licensing/licenses/gpl.txt
   8  *
   9  * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
  10  * Copyright (c) 2005 Paul Cifarelli All Rights Reserved.
  11  *
  12  *
  13  * This file is part of the Helix DNA Technology. RealNetworks is the
  14  * developer of the Original Code and owns the copyrights in the
  15  * portions it created.
  16  *
  17  * This file, and the files included with this file, is distributed
  18  * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
  19  * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
  20  * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
  21  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
  22  * ENJOYMENT OR NON-INFRINGEMENT.
  23  *
  24  * Technology Compatibility Kit Test Suite(s) Location:
  25  *    http://www.helixcommunity.org/content/tck
  26  *
  27  * ***** END LICENSE BLOCK ***** */
  28
  29 #ifndef _GAIN_H_
  30 #define _GAIN_H_
  31
  32 #include "hxtypes.h"
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 #define GAIN_MAX_dB  0.0
  39 #define GAIN_MIN_dB -27.0
  40
  41 struct GAIN_STATE;
  42 typedef struct GAIN_STATE GAIN_STATE;
  43
  44 GAIN_STATE* gainInit(int sampleRate, int nChannels, int bytePerSample) ;
  45 void gainFree(GAIN_STATE*) ;
  46 float gainSetImmediatedB(float dB, GAIN_STATE*) ;
  47 float gainSetSmoothdB(float dB, GAIN_STATE*);
  48 float gainSetImmediate(float dB, GAIN_STATE*) ;
  49 float gainSetSmooth(float dB, GAIN_STATE*);
  50 void gainSetMute(GAIN_STATE* g);
  51 int gainSetTimeConstant(float millis, GAIN_STATE*) ;
  52 void gainFeed(unsigned char* signal, unsigned char *outsignal, int len, GAIN_STATE* g) ;
  53
  54 #ifdef __cplusplus
  55 }
  56 #endif
  57
  58 #endif /* _GAIN_H_ */