/usr/include/SndObj/SndJackIO.h is in libsndobj-dev 2.6.7+ds1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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////////////////////////////////////////////////////////////////////////
// This file is part of the SndObj library
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
////////////////////////////////////////////////
// SndJackIO.h : interface of the SndJackIO class
// jack IO client support
//
//
#ifndef _SNDJACKIO_H
#define _SNDJACKIO_H
#include "SndIO.h"
#include <jack/jack.h>
class SndJackIO : public SndIO {
protected:
float **m_inbuff;
float **m_outbuff;
bool *m_inused;
bool *m_outused;
int m_curbuff;
int m_outcurbuff;
int m_incurbuff;
int m_incount;
int m_outcount;
int m_buffno;
jack_nframes_t m_bufframes;
int m_items;
jack_client_t *m_client;
jack_port_t **m_inport; // arrays of ports
jack_port_t **m_outport; // one per channel
int m_mode;
public:
SndJackIO(char* name, int channels=2, int mode=SND_IO, int
buffnos=2, SndObj** inObjs=0, int vecsize=DEF_VECSIZE,
float sr=DEF_SR);
~SndJackIO();
int ConnectIn(int channel, char* port);
int ConnectOut(int channel, char* port);
int DisconnectIn(int channel, char* port);
int DisconnectOut(int channel, char* port);
jack_client_t *GetClient() { return m_client; }
jack_port_t *GetInPort(int channel) { return m_inport[channel-1];}
jack_port_t *GetOutPort(int channel) { return m_outport[channel-1];}
short Read();
short Write();
char *ErrorMessage();
int JProcess(jack_nframes_t nframes);
void JShutdown();
int BufferResize(jack_nframes_t nframes);
};
#endif // _SNDJACKIO_H
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