jamulus/linux/sound.h

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/******************************************************************************\
* Copyright (c) 2004-2010
*
* Author(s):
* Volker Fischer
*
******************************************************************************
*
* 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
*
\******************************************************************************/
#if !defined(_SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_)
#define _SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
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#include <qthread.h>
#include <string.h>
#include "util.h"
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#include "soundbase.h"
#include "global.h"
#if WITH_SOUND
# include <jack/jack.h>
#endif
/* Definitions ****************************************************************/
#define NUM_IN_OUT_CHANNELS 2 // always stereo
// the number of periods is critical for latency
#define NUM_PERIOD_BLOCKS_IN 2
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#define NUM_PERIOD_BLOCKS_OUT 1
#define MAX_SND_BUF_IN 200
#define MAX_SND_BUF_OUT 200
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/* Classes ********************************************************************/
#if WITH_SOUND
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class CSound : public CSoundBase
{
public:
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CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* arg ), void* arg ) :
CSoundBase ( true, fpNewProcessCallback, arg ) { OpenJack(); }
virtual ~CSound() { CloseJack(); }
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virtual int Init ( const int iNewPrefMonoBufferSize );
virtual void Start();
virtual void Stop();
// these variables should be protected but cannot since we want
// to access them from the callback function
CVector<short> vecsTmpAudioSndCrdStereo;
int iJACKBufferSizeMono;
int iJACKBufferSizeStero;
jack_port_t* input_port_left;
jack_port_t* input_port_right;
jack_port_t* output_port_left;
jack_port_t* output_port_right;
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protected:
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void OpenJack();
void CloseJack();
// callbacks
static int process ( jack_nframes_t nframes, void* arg );
static int bufferSizeCallback ( jack_nframes_t nframes, void *arg );
static void shutdownCallback ( void *arg );
jack_client_t* pJackClient;
};
#else
// no sound -> dummy class definition
class CSound : public CSoundBase
{
public:
CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* pParg ), void* pParg ) :
CSoundBase ( false, fpNewProcessCallback, pParg ) {}
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virtual ~CSound() {}
// dummy definitions
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virtual int Init ( const int iNewPrefMonoBufferSize ) { return CSoundBase::Init ( iNewPrefMonoBufferSize ); }
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virtual bool Read ( CVector<short>& ) { printf ( "no sound!" ); return false; }
virtual bool Write ( CVector<short>& ) { printf ( "no sound!" ); return false; }
};
#endif // WITH_SOUND
#endif // !defined(_SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_)