/***************************************************************************
 *   Copyright (C) 2008 by Sindre Aamås                                    *
 *   sinamas@users.sourceforge.net                                         *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License version 2 as     *
 *   published by the Free Software Foundation.                            *
 *                                                                         *
 *   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 version 2 for more details.                *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   version 2 along with this program; if not, write to the               *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.             *
 ***************************************************************************/
#ifndef RESAMPLER_INFO_H
#define RESAMPLER_INFO_H

#include <cstddef>

class Resampler;

/**
  * Used for creating instances of resamplers, and getting information on
  * available resamplers.
  */
struct ResamplerInfo {
	/** Number of interleaved channels per audio sample (frame) */
	enum { channels = 2 };

	/** Short character string description of the resampler. */
	char const *desc;

	/**
	  * Points to a function that can be used to create an instance of the resampler.
	  *
	  * @param inRate  The input sampling rate.
	  * @param outRate The desired output sampling rate.
	  * @param periodSize The maximum number of input samples to resample at a time/The
	  *                   maximal inlen passed to Resampler::resample.
	  * @return Pointer to the created instance on the free store.
	  */
	Resampler * (*create)(long inRate, long outRate, std::size_t periodSize);

	/** Returns the number of ResamplerInfos that can be gotten with get(). */
	static std::size_t num() { return num_; }

	/** Returns ResamplerInfo number n. Where n is less than num(). */
	static ResamplerInfo const & get(std::size_t n) { return resamplers_[n]; }

private:
	static ResamplerInfo const resamplers_[];
	static std::size_t const num_;
};

#endif
