jack2/linux/iio/JackIIODriver.h

/*
Copyright (C) 2013 Matt Flax <flatmax@flatmax.org>

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 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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifndef JACKIIODRIVER_H
#define JACKIIODRIVER_H

#include "JackAudioDriver.h"
#include "JackThreadedDriver.h"

#include <IIO/IIOMMap.H>

namespace Jack {

/** The Linux Industrial IO (IIO) subsystem driver for Jack.
Currently this driver only supports capture.
*/
class JackIIODriver : public JackAudioDriver {

public:
    IIOMMap iio; ///< The actual IIO devices
    Eigen::Array<unsigned short int, Eigen::Dynamic, Eigen::Dynamic> data; ///< When we grab a mmapped buffer, store it here.

    /** Constructor
    */
    JackIIODriver(const char* name, const char* alias, JackLockedEngine* engine, JackSynchro* table) : JackAudioDriver(name, alias, engine, table) {
    }

    /** Destructor
    */
    virtual ~JackIIODriver() {
    }

    virtual int Open(jack_nframes_t buffer_size,
                     jack_nframes_t samplerate,
                     bool capturing,
                     bool playing,
                     int inchannels,
                     int outchannels,
                     bool monitor,
                     const char* capture_driver_name,
                     const char* playback_driver_name,
                     jack_nframes_t capture_latency,
                     jack_nframes_t playback_latency);

    virtual int Close();

    virtual int Read(); ///< Read from the IIO sysetm and load the jack buffers

    virtual int Write(); ///< Not implemented.

    virtual int SetBufferSize(jack_nframes_t buffer_size) {
        //cout<<"JackIIODriver::SetBufferSize("<<buffer_size<<")\n";
        return JackAudioDriver::SetBufferSize(buffer_size);
    }
};

} // end of Jack namespace
#endif // JACKIIODRIVER_H