forked from bartvdbraak/blender
129 lines
3.2 KiB
C++
129 lines
3.2 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* Copyright 2009-2011 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* Audaspace is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Audaspace; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file audaspace/sndfile/AUD_SndFileReader.h
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* \ingroup audsndfile
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*/
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#ifndef __AUD_SNDFILEREADER_H__
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#define __AUD_SNDFILEREADER_H__
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#include "AUD_IReader.h"
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#include "AUD_Buffer.h"
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#include <string>
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#include <sndfile.h>
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#include <boost/shared_ptr.hpp>
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typedef sf_count_t (*sf_read_f)(SNDFILE *sndfile, void *ptr, sf_count_t frames);
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/**
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* This class reads a sound file via libsndfile.
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*/
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class AUD_SndFileReader : public AUD_IReader
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{
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private:
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/**
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* The current position in samples.
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*/
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int m_position;
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/**
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* The sample count in the file.
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*/
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int m_length;
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/**
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* Whether the file is seekable.
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*/
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bool m_seekable;
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/**
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* The specification of the audio data.
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*/
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AUD_Specs m_specs;
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/**
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* The sndfile.
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*/
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SNDFILE* m_sndfile;
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/**
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* The virtual IO structure for memory file reading.
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*/
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SF_VIRTUAL_IO m_vio;
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/**
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* The pointer to the memory file.
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*/
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boost::shared_ptr<AUD_Buffer> m_membuffer;
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/**
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* The current reading pointer of the memory file.
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*/
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int m_memoffset;
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// Functions for libsndfile virtual IO functionality
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static sf_count_t vio_get_filelen(void *user_data);
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static sf_count_t vio_seek(sf_count_t offset, int whence, void *user_data);
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static sf_count_t vio_read(void *ptr, sf_count_t count, void *user_data);
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static sf_count_t vio_tell(void *user_data);
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// hide copy constructor and operator=
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AUD_SndFileReader(const AUD_SndFileReader&);
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AUD_SndFileReader& operator=(const AUD_SndFileReader&);
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public:
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/**
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* Creates a new reader.
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* \param filename The path to the file to be read.
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* \exception AUD_Exception Thrown if the file specified does not exist or
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* cannot be read with libsndfile.
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*/
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AUD_SndFileReader(std::string filename);
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/**
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* Creates a new reader.
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* \param buffer The buffer to read from.
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* \exception AUD_Exception Thrown if the buffer specified cannot be read
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* with libsndfile.
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*/
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AUD_SndFileReader(boost::shared_ptr<AUD_Buffer> buffer);
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/**
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* Destroys the reader and closes the file.
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*/
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virtual ~AUD_SndFileReader();
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virtual bool isSeekable() const;
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virtual void seek(int position);
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virtual int getLength() const;
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virtual int getPosition() const;
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virtual AUD_Specs getSpecs() const;
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virtual void read(int& length, bool& eos, sample_t* buffer);
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};
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#endif //__AUD_SNDFILEREADER_H__
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