SndFileReader.h

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/*******************************************************************************
 * Copyright 2009-2015 Jörg Müller
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

#pragma once

#include "IReader.h"

#ifdef LIBSNDFILE_PLUGIN
#define AUD_BUILD_PLUGIN
#endif

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

AUD_NAMESPACE_BEGIN

class Buffer;

class AUD_PLUGIN_API SndFileReader : public IReader
{
private:
    int m_position;

    int m_length;

    bool m_seekable;

    Specs m_specs;

    SNDFILE* m_sndfile;

    SF_VIRTUAL_IO m_vio;

    std::shared_ptr<Buffer> m_membuffer;

    int m_memoffset;

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

    // delete copy constructor and operator=
    SndFileReader(const SndFileReader&) = delete;
    SndFileReader& operator=(const SndFileReader&) = delete;

public:
    SndFileReader(std::string filename);

    SndFileReader(std::shared_ptr<Buffer> buffer);

    virtual ~SndFileReader();

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

AUD_NAMESPACE_END