simpleresampler.h

MiniSip Client with DomainKeys Authentication, Sip, Audio communications, Echo Cancel

/*
 Copyright (C) 2004-2006 the Minisip Team
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.
 
 This library 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
 Lesser General Public License for more details.
 
 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

/* Copyright (C) 2004, 2005
 *
 * Authors: Erik Eliasson <[e-mail]>
 *          Johan Bilien <[e-mail]>
 *          Ignacio Sanchez Pardo <[e-mail]>
*/

#ifndef SIMPLE_RESAMPLER_H
#define SIMPLE_RESAMPLER_H

#include<libminisip/libminisip_config.h>

#include<libminisip/soundcard/Resampler.h>

class SimpleResampler : public Resampler {
	public: 
		virtual void resample( short * input, short * output );
		SimpleResampler( uint32_t inputFreq, uint32_t outputFreq, 
         			 uint32_t duration, uint32_t nChannels );
		~SimpleResampler();


	private:
		void upSample( short * input, short * output );
		void downSample( short * input, short * output );
		
		uint32_t inputFrames;
		uint32_t outputFrames;

		uint32_t nChannels;
		uint32_t sampleRatio;

		short * previousFrame;

};

class SimpleResamplerPlugin: public ResamplerPlugin{
	public:
		SimpleResamplerPlugin( MRef<Library *> lib ): ResamplerPlugin( lib ){}
		
		virtual std::string getName() const { return "simple_resampler"; }

		virtual uint32_t getVersion() const { return 0x00000001; }

		virtual std::string getDescription() const { return "Simple resampler"; }

		virtual MRef<Resampler *> createResampler(
			uint32_t inputFreq, uint32_t outputFreq,
			uint32_t duration, uint32_t nChannels ) const{
			return new SimpleResampler( inputFreq, outputFreq,
						   duration, nChannels );
		}

		virtual std::string getMemObjectType(){ return "SimpleResamplerPlugin"; }
};

#endif