jamulus/linux/sound.h
2009-03-28 09:05:56 +00:00

165 lines
5.4 KiB
C++
Executable file

/******************************************************************************\
* Copyright (c) 2004-2009
*
* Author(s):
* Volker Fischer, Alexander Kurpiers
*
* This code is based on the Open-Source sound interface implementation of
* the Dream DRM Receiver project.
*
\******************************************************************************/
#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>
#include <qthread.h>
#include <string.h>
#include "util.h"
#include "soundbase.h"
#include "global.h"
#if WITH_SOUND
# if USE_JACK
# include <jack/jack.h>
# else
# define ALSA_PCM_NEW_HW_PARAMS_API
# define ALSA_PCM_NEW_SW_PARAMS_API
# include <alsa/asoundlib.h>
# endif
#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
# if USE_JACK
class CSound : public CSoundBase
{
public:
CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* arg ), void* arg ) :
CSoundBase ( true, fpNewProcessCallback, arg ) { OpenJack(); }
virtual ~CSound() { CloseJack(); }
virtual int Init ( const int iNewPrefMonoBufferSize );
virtual void Start();
virtual void Stop();
// not implemented yet, always return one device and default string
int GetNumDev() { return 1; }
std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
std::string SetDev ( const int iNewDev ) { return ""; } // dummy
int GetDev() { return 0; }
// 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 nframes, void *arg );
static void shutdownCallback ( void *arg );
jack_client_t* pJackClient;
};
# else
class CSound : public CSoundBase
{
public:
CSound ( void (*fpNewProcessCallback) ( CVector<short>& psData, void* pParg ), void* pParg ) :
CSoundBase ( false, fpNewProcessCallback, pParg ), rhandle ( NULL ),
phandle ( NULL ), iCurPeriodSizeIn ( NUM_PERIOD_BLOCKS_IN ),
iCurPeriodSizeOut ( NUM_PERIOD_BLOCKS_OUT ), bChangParamIn ( true ),
bChangParamOut ( true ) {}
virtual ~CSound() { Close(); }
// not implemented yet, always return one device and default string
int GetNumDev() { return 1; }
std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
std::string SetDev ( const int iNewDev ) { return ""; } // dummy
int GetDev() { return 0; }
virtual int Init ( const int iNewPrefMonoBufferSize )
{
// init base class
CSoundBase::Init ( iNewPrefMonoBufferSize );
// set internal buffer size for read and write
iBufferSizeIn = iNewPrefMonoBufferSize;
iBufferSizeOut = iNewPrefMonoBufferSize;
InitRecording();
InitPlayback();
return iNewPrefMonoBufferSize;
}
virtual bool Read ( CVector<short>& psData );
virtual bool Write ( CVector<short>& psData );
protected:
void Close();
void InitRecording();
void InitPlayback();
snd_pcm_t* rhandle;
snd_pcm_t* phandle;
bool SetHWParams ( snd_pcm_t* handle, const int iBufferSizeIn,
const int iNumPeriodBlocks );
int iBufferSizeOut;
int iBufferSizeIn;
bool bChangParamIn;
int iCurPeriodSizeIn;
bool bChangParamOut;
int iCurPeriodSizeOut;
};
# endif // USE_JACK
#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 ) {}
virtual ~CSound() { Close(); }
// not used
int GetNumDev() { return 1; }
std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
std::string SetDev ( const int iNewDev ) { return ""; } // dummy
int GetDev() { return 0; }
// dummy definitions
virtual int Init ( const int iNewPrefMonoBufferSize ) { CSoundBase::Init ( iNewPrefMonoBufferSize ); }
virtual bool Read ( CVector<short>& psData ) { printf ( "no sound!" ); return false; }
virtual bool Write ( CVector<short>& psData ) { printf ( "no sound!" ); return false; }
};
#endif // WITH_SOUND
#endif // !defined(_SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_)