RAExactResampler.h
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:4k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #ifndef _RAEXACTRESAMPLER_H_
- #define _RAEXACTRESAMPLER_H_
- #include "hxresult.h"
- class RAExactResampler
- {
- public:
- // resampler quality
- enum {
- qualityVeryLow= 0, // as low a quality as we dare
- qualityLow = 1, // somewhat better
- qualityMedium = 2, // probably sufficient for the player
- qualityHigh = 3, // the default, giving CD quality,
- qualityHyper = 4 // better than CD quality (think DSD)
- } ;
- // Create a resampler with a given quality level.
- static HX_RESULT Create(RAExactResampler** pRes, int inrate, int outrate, int chans, int intype, int quality = qualityHigh) ;
- // If you know the specs your resampler is required to have, use one of these functions.
- static HX_RESULT Create(RAExactResampler** pRes, int inrate, int outrate, int chans, int intype, float atten, float trans, float dcgain) ;
- static HX_RESULT Create(RAExactResampler** pRes, int inrate, int outrate, int chans, int intype, float atten, float passband, float stopband, float dcgain) ;
- virtual ~RAExactResampler() ;
- // this is the input data type.
- enum {
- _INT16 = 0,
- _INT32 = 1,
- _FLOAT = 2
- } ;
- /*
- * insamps is the number of samples (not sample frames) you are handing the resampler.
- * Note that in the case of stereo, this must be divisible by two.
- */
- virtual int Resample(void *inbuf, int insamps, signed short *outbuf) = 0 ;
- virtual int Resample(void *inbuf, int insamps, signed int *outbuf) = 0 ;
- /*
- * The maximum output, in samples, that could be produced by
- * insamps input samples.
- */
- virtual int GetMaxOutput(int insamps) = 0 ;
- /*
- * The minimum input, in samples, that will produce at least
- * outsamps output samples.
- */
- virtual int GetMinInput(int outsamps) = 0 ;
- /*
- * The delay of this filter, in frames of output frequency.
- */
- virtual int GetDelay() = 0 ;
- protected:
- RAExactResampler() ; // make this protected -- use the Create() function!
- };
- #endif // _RAEXACTRESAMPLER_H_