109 lines
3.6 KiB
C++
Executable File
109 lines
3.6 KiB
C++
Executable File
/******************************************************************************\
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* Copyright (c) 2004-2008
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*
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* Author(s):
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* Volker Fischer, Alexander Kurpiers
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*
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* This code is based on the Open-Source sound interface implementation of
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* the Dream DRM Receiver project.
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*
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\******************************************************************************/
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#if !defined(_SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_)
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#define _SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "util.h"
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#include "global.h"
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#if WITH_SOUND
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# define ALSA_PCM_NEW_HW_PARAMS_API
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# define ALSA_PCM_NEW_SW_PARAMS_API
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# include <alsa/asoundlib.h>
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#endif
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/* Definitions ****************************************************************/
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#define NUM_IN_OUT_CHANNELS 2 // always stereo
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// the number of periods is critical for latency
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#define NUM_PERIOD_BLOCKS_IN 2
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#define NUM_PERIOD_BLOCKS_OUT 2
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#define MAX_SND_BUF_IN 200
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#define MAX_SND_BUF_OUT 200
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/* Classes ********************************************************************/
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class CSound
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{
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public:
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CSound ( const int iNewBufferSizeStereo )
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#if WITH_SOUND
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: rhandle ( NULL ), phandle ( NULL ), iCurPeriodSizeIn ( NUM_PERIOD_BLOCKS_IN ),
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iCurPeriodSizeOut ( NUM_PERIOD_BLOCKS_OUT ), bChangParamIn ( true ),
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bChangParamOut ( true )
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{
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// set internal buffer size for read and write
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iBufferSizeIn = iNewBufferSizeStereo / NUM_IN_OUT_CHANNELS; // mono size
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iBufferSizeOut = iNewBufferSizeStereo / NUM_IN_OUT_CHANNELS; // mono size
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}
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#else
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{}
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#endif
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virtual ~CSound() { Close(); }
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// not implemented yet, always return one device and default string
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int GetNumDev() { return 1; }
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std::string GetDeviceName ( const int iDiD ) { return "wave mapper"; }
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int SetDev ( const int iNewDev ) {} // dummy
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int GetDev() { return 0; }
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#if WITH_SOUND
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void SetInNumBuf ( int iNewNum );
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int GetInNumBuf() { return iCurPeriodSizeIn; }
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void SetOutNumBuf ( int iNewNum );
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int GetOutNumBuf() { return iCurPeriodSizeOut; }
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void InitRecording ( const bool bNewBlocking = true );
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void InitPlayback ( const bool bNewBlocking = false );
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bool Read ( CVector<short>& psData );
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bool Write ( CVector<short>& psData );
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void Close();
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protected:
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snd_pcm_t* rhandle;
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snd_pcm_t* phandle;
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bool SetHWParams ( snd_pcm_t* handle, const int iBufferSizeIn,
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const int iNumPeriodBlocks );
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int iBufferSizeOut;
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int iBufferSizeIn;
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bool bChangParamIn;
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int iCurPeriodSizeIn;
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bool bChangParamOut;
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int iCurPeriodSizeOut;
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#else
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// dummy definitions
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void SetInNumBuf ( int iNewNum ) {}
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int GetInNumBuf() { return 1; }
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void SetOutNumBuf ( int iNewNum ) {}
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int GetOutNumBuf() { return 1; }
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void InitRecording ( const bool bNewBlocking = true ) { printf ( "no sound!" ); }
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void InitPlayback ( const bool bNewBlocking = false ) { printf ( "no sound!" ); }
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bool Read ( CVector<short>& psData ) { printf ( "no sound!" ); return false; }
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bool Write ( CVector<short>& psData ) { printf ( "no sound!" ); return false; }
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void Close() {}
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#endif
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};
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#endif // !defined(_SOUND_H__9518A621345F78_3634567_8C0D_EEBF182CF549__INCLUDED_)
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