AUD_SndFileReader.h

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/*
 * $Id: AUD_SndFileReader.h 35141 2011-02-25 10:21:56Z jesterking $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * Copyright 2009-2011 Jörg Hermann Müller
 *
 * This file is part of AudaSpace.
 *
 * Audaspace is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * AudaSpace 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Audaspace; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef AUD_SNDFILEREADER
#define AUD_SNDFILEREADER

#include "AUD_IReader.h"
#include "AUD_Reference.h"
#include "AUD_Buffer.h"

#include <string>
#include <sndfile.h>

typedef sf_count_t (*sf_read_f)(SNDFILE *sndfile, void *ptr, sf_count_t frames);

class AUD_SndFileReader : public AUD_IReader
{
private:
        int m_position;

        int m_length;

        bool m_seekable;

        AUD_Specs m_specs;

        AUD_Buffer m_buffer;

        SNDFILE* m_sndfile;

        SF_VIRTUAL_IO m_vio;

        AUD_Reference<AUD_Buffer> m_membuffer;

        int m_memoffset;

        // Functions for libsndfile virtual IO functionality
        static sf_count_t vio_get_filelen(void *user_data);
        static sf_count_t vio_seek(sf_count_t offset, int whence, void *user_data);
        static sf_count_t vio_read(void *ptr, sf_count_t count, void *user_data);
        static sf_count_t vio_tell(void *user_data);

        // hide copy constructor and operator=
        AUD_SndFileReader(const AUD_SndFileReader&);
        AUD_SndFileReader& operator=(const AUD_SndFileReader&);

public:
        AUD_SndFileReader(std::string filename);

        AUD_SndFileReader(AUD_Reference<AUD_Buffer> buffer);

        virtual ~AUD_SndFileReader();

        virtual bool isSeekable() const;
        virtual void seek(int position);
        virtual int getLength() const;
        virtual int getPosition() const;
        virtual AUD_Specs getSpecs() const;
        virtual void read(int & length, sample_t* & buffer);
};

#endif //AUD_SNDFILEREADER