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/* aKode: Resampler abstract-type
Copyright (C) 2004 Allan Sandfeld Jensen <kde@carewolf.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef _AKODE_RESAMPLER_H
#define _AKODE_RESAMPLER_H
#include <string>
#include "pluginhandler.h"
#include "akode_export.h"
namespace aKode {
using std::string;
class AudioFrame;
//! A generic interface for all resamplers
/*!
* Resamplers are used to change the samplerate of sample
*/
class AKODE_EXPORT Resampler {
public:
virtual ~Resampler() {};
/*!
* Returns true if convertion was succesfull.
*/
virtual bool doFrame(AudioFrame *in, AudioFrame *out) = 0;
/*!
* Sets the output sample-rate to \a value.
*/
virtual void setSampleRate(unsigned int rate) = 0;
/*!
* Sets the resample speed to \a value.
*/
virtual void setSpeed(float value) = 0;
};
class ResamplerPlugin {
public:
virtual Resampler* openResampler() = 0;
};
class AKODE_EXPORT ResamplerPluginHandler : public PluginHandler, public ResamplerPlugin {
public:
ResamplerPluginHandler() : resampler_plugin(0) {};
ResamplerPluginHandler(const string name);
Resampler* openResampler();
/*!
* Loads a resampler-plugin by the \a name (src, fast..)
*/
virtual bool load(const string name);
bool isLoaded() { return resampler_plugin != 0; };
protected:
ResamplerPlugin* resampler_plugin;
};
} // namespace
#endif
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