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/*
* $Id$
*
* ***** 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 *****
*/
/** \file audaspace/sndfile/AUD_SndFileReader.h
* \ingroup audsndfile
*/
#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);
/**
* This class reads a sound file via libsndfile.
*/
class AUD_SndFileReader : public AUD_IReader
{
private:
/**
* The current position in samples.
*/
int m_position;
/**
* The sample count in the file.
*/
int m_length;
/**
* Whether the file is seekable.
*/
bool m_seekable;
/**
* The specification of the audio data.
*/
AUD_Specs m_specs;
/**
* The sndfile.
*/
SNDFILE* m_sndfile;
/**
* The virtual IO structure for memory file reading.
*/
SF_VIRTUAL_IO m_vio;
/**
* The pointer to the memory file.
*/
AUD_Reference<AUD_Buffer> m_membuffer;
/**
* The current reading pointer of the memory file.
*/
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:
/**
* Creates a new reader.
* \param filename The path to the file to be read.
* \exception AUD_Exception Thrown if the file specified does not exist or
* cannot be read with libsndfile.
*/
AUD_SndFileReader(std::string filename);
/**
* Creates a new reader.
* \param buffer The buffer to read from.
* \exception AUD_Exception Thrown if the buffer specified cannot be read
* with libsndfile.
*/
AUD_SndFileReader(AUD_Reference<AUD_Buffer> buffer);
/**
* Destroys the reader and closes the file.
*/
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
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