AudioBackendLibao.h

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//-----------------------------------------------------------------------------
//
//  $Id: AudioBackendLibao.h 874 2014-09-08 02:21:29Z weegreenblobbie $
//
//  Nsound is a C++ library and Python module for audio synthesis featuring
//  dynamic digital filters. Nsound lets you easily shape waveforms and write
//  to disk or plot them. Nsound aims to be as powerful as Csound but easy to
//  use.
//
//  Copyright (c) 2011-Present Nick Hilton
//
//  weegreenblobbie_yahoo_com (replace '_' with '@' and '.')
//
//-----------------------------------------------------------------------------

//-----------------------------------------------------------------------------
//
//  This program 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.
//
//  This program 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 Library General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
//-----------------------------------------------------------------------------
#ifndef _NSOUND_AUDIO_BACKEND_LIBAO_H_
#define _NSOUND_AUDIO_BACKEND_LIBAO_H_

#include <Nsound/Nsound.h>
#include <Nsound/AudioBackend.h>

#include <sstream>
#include <string>
#include <vector>

// Forward declare
struct ao_device;

namespace Nsound
{

//-----------------------------------------------------------------------------
class AudioBackendLibao : public AudioBackend
{
    public:

    AudioBackendLibao(
        uint32 sample_rate     = 44100,
        uint32 channels        = 1,
        uint32 bits_per_sample = 16);

    ~AudioBackendLibao();

    AudioBackendType
    getBackendType();

    std::string
    getError();

    std::string
    getInfo();

    void
    initialize();

    void
    play(void * data, uint32 n_bytes);

    void
    scanDevices(AudioPlayback & pb, const AudioStream & test_clip);

    //
    void
    setOption(const std::string & key, const std::string & value);

    void
    shutdown();

    private:

    // disable these
    AudioBackendLibao(const AudioBackendLibao & copy)
        :
        AudioBackend(),
        options_(),
        error_buffer_(""),
        driver_id_(-1),
        device_ptr_(NULL){};

    AudioBackendLibao & operator=(const AudioBackendLibao & rhs){return *this;};

    std::vector< std::string > options_;
    std::stringstream error_buffer_;

    int32 driver_id_;
    ao_device * device_ptr_;
};

} // namespace Nsound

// :mode=c++: jEdit modeline
#endif