jamulus/linux/sound.h

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/******************************************************************************\
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* Copyright (c) 2004-2019
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*
* 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
*
\******************************************************************************/
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#pragma once
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#ifndef JACK_REPLACES_ASIO // these headers are not available in Windows OS
# include <unistd.h>
# include <sys/ioctl.h>
#endif
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#include <fcntl.h>
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <QThread>
#include <string.h>
#include "util.h"
#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
#define NUM_PERIOD_BLOCKS_OUT 1
#define MAX_SND_BUF_IN 200
#define MAX_SND_BUF_OUT 200
/* Classes ********************************************************************/
#if WITH_SOUND
class CSound : public CSoundBase
{
public:
CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* arg ),
void* arg,
const int iCtrlMIDIChannel ) :
CSoundBase ( "Jack", true, fpNewProcessCallback, arg, iCtrlMIDIChannel ), iJACKBufferSizeMono ( 0 ),
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iJACKBufferSizeStero ( 0 ) { OpenJack(); }
virtual ~CSound() { CloseJack(); }
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;
protected:
void OpenJack();
void CloseJack();
// callbacks
static int process ( jack_nframes_t nframes, void* arg );
static int bufferSizeCallback ( jack_nframes_t, void *arg );
static void shutdownCallback ( void* );
jack_client_t* pJackClient;
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};
#else
// no sound -> dummy class definition
class CSound : public CSoundBase
{
public:
CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* pParg ),
void* pParg,
const int iCtrlMIDIChannel ) :
CSoundBase ( "nosound", false, fpNewProcessCallback, pParg, iCtrlMIDIChannel ) {}
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virtual ~CSound() {}
};
#endif // WITH_SOUND