AUD_SndFileReader.h

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/*
 * ***** 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;

    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, bool& eos, sample_t* buffer);
};

#endif //AUD_SNDFILEREADER