jamulus/linux/sound.h
2006-01-28 11:29:22 +00:00

105 lines
3 KiB
C++
Executable file

/******************************************************************************\
* Copyright (c) 2004-2005
*
* 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 <string.h>
#include "util.h"
#include "global.h"
#if WITH_SOUND
# define ALSA_PCM_NEW_HW_PARAMS_API
# define ALSA_PCM_NEW_SW_PARAMS_API
# include <alsa/asoundlib.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 2
#define MAX_SND_BUF_IN 200
#define MAX_SND_BUF_OUT 200
/* Classes ********************************************************************/
class CSound
{
public:
CSound()
#if WITH_SOUND
: rhandle(NULL), phandle(NULL), iCurPeriodSizeIn(NUM_PERIOD_BLOCKS_IN),
iCurPeriodSizeOut(NUM_PERIOD_BLOCKS_OUT)
#endif
{}
virtual ~CSound() {Close();}
/* Not implemented yet, always return one device and default string */
int GetNumDev() {return 1;}
void SetOutDev(int iNewDev) {}
void SetInDev(int iNewDev) {}
/* Return invalid device ID which is the same as using "wave mapper" which
we assume here to be used */
int GetOutDev() {return 1;}
int GetInDev() {return 1;}
#if WITH_SOUND
void SetInNumBuf(int iNewNum);
int GetInNumBuf() {return iCurPeriodSizeIn;}
void SetOutNumBuf(int iNewNum);
int GetOutNumBuf() {return iCurPeriodSizeOut;}
void InitRecording(int iNewBufferSize, bool bNewBlocking = true);
void InitPlayback(int iNewBufferSize, bool bNewBlocking = false);
bool Read(CVector<short>& psData);
bool Write(CVector<short>& psData);
void Close();
protected:
snd_pcm_t* rhandle;
snd_pcm_t* phandle;
bool SetHWParams(snd_pcm_t* handle, const bool bIsRecord,
const int iBufferSizeIn, const int iNumPeriodBlocks);
int iBufferSizeOut;
int iBufferSizeIn;
bool bChangParamIn;
int iCurPeriodSizeIn;
bool bChangParamOut;
int iCurPeriodSizeOut;
#else
/* Dummy definitions */
void SetInNumBuf(int iNewNum) {}
int GetInNumBuf() {return 1;}
void SetOutNumBuf(int iNewNum) {}
int GetOutNumBuf() {return 1;}
void InitRecording(int iNewBufferSize, bool bNewBlocking = true) {printf("no sound!");}
void InitPlayback(int iNewBufferSize, bool bNewBlocking = false) {printf("no sound!");}
bool Read(CVector<short>& psData) {printf("no sound!"); return false;}
bool Write(CVector<short>& psData) {printf("no sound!"); return false;}
void Close() {}
#endif
};
#endif // !defined(_SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_)