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DSoundDev.cpp
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DSoundDev.cpp
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/*****************************************************************************/
/* DSoundHost.cpp: DirectSound double-buffer classes */
/*****************************************************************************/
/******************************************************************************
Copyright (C) 2006 Hermann Seib
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include "stdafx.h"
#include "DSoundDev.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
/*****************************************************************************/
/* GUIDs (potentially) used herein */
/*****************************************************************************/
#include <initguid.h>
/* copied from dsound.h */
DEFINE_GUID(CLSID_DirectSound, 0x47d4d946, 0x62e8, 0x11cf, 0x93, 0xbc, 0x44, 0x45, 0x53, 0x54, 0x0, 0x0);
DEFINE_GUID(CLSID_DirectSoundCapture, 0xb0210780, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);
DEFINE_GUID(IID_IDirectSound, 0x279AFA83, 0x4981, 0x11CE, 0xA5, 0x21, 0x00, 0x20, 0xAF, 0x0B, 0xE5, 0x60);
DEFINE_GUID(IID_IDirectSoundCapture, 0xb0210781, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);
DEFINE_GUID(IID_IDirectSoundBuffer, 0x279AFA85, 0x4981, 0x11CE, 0xA5, 0x21, 0x00, 0x20, 0xAF, 0x0B, 0xE5, 0x60);
DEFINE_GUID(IID_IDirectSound3DListener, 0x279AFA84, 0x4981, 0x11CE, 0xA5, 0x21, 0x00, 0x20, 0xAF, 0x0B, 0xE5, 0x60);
DEFINE_GUID(IID_IDirectSound3DBuffer, 0x279AFA86, 0x4981, 0x11CE, 0xA5, 0x21, 0x00, 0x20, 0xAF, 0x0B, 0xE5, 0x60);
DEFINE_GUID(IID_IDirectSoundCaptureBuffer, 0xb0210782, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);
DEFINE_GUID(IID_IDirectSoundNotify, 0xb0210783, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0, 0xa0, 0xc9, 0x25, 0xcd, 0x16);
DEFINE_GUID(IID_IKsPropertySet, 0x31efac30, 0x515c, 0x11d0, 0xa9, 0xaa, 0x00, 0xaa, 0x00, 0x61, 0xbe, 0x93);
/*****************************************************************************/
/* CDSoundDll class declaration */
/*****************************************************************************/
/* This encapsulation is necessary since not all systems have the same set */
/* of functions in DSOUND.dll (or no DSOUND.dll at all!) */
/*****************************************************************************/
class CDSoundDll
{
public:
CDSoundDll();
virtual ~CDSoundDll();
bool IsLoaded() { return !!hDll; }
HRESULT CaptureCreate(LPGUID lpGUID, LPDIRECTSOUNDCAPTURE *lplpDSC, LPUNKNOWN pUnkOuter);
HRESULT Create(LPGUID lpGuid, LPDIRECTSOUND * ppDS, IUnknown FAR * pUnkOuter);
HRESULT CaptureEnumerate(LPDSENUMCALLBACK lpDSEnumCallback, LPVOID lpContext);
HRESULT Enumerate(LPDSENUMCALLBACK lpDSEnumCallback, LPVOID lpContext);
protected:
enum
{
eFuncCaptureCreate,
eFuncCreate,
eFuncCaptureEnumerate,
eFuncEnumerate,
eFuncMax
};
bool LoadDll();
bool UnloadDll();
HMODULE hDll;
FARPROC proc[eFuncMax];
};
/*****************************************************************************/
/* CDSoundDll : constructor */
/*****************************************************************************/
CDSoundDll::CDSoundDll()
{
hDll = NULL;
LoadDll(); /* initialize DLL automatically */
}
/*****************************************************************************/
/* ~CDSoundDll : destructor */
/*****************************************************************************/
CDSoundDll::~CDSoundDll()
{
UnloadDll(); /* make sure to unload the DLL */
}
/*****************************************************************************/
/* LoadDll : loads the DirectSound DLL and resolves needed entry points */
/*****************************************************************************/
bool CDSoundDll::LoadDll()
{
UnloadDll(); /* start clean */
/* make sure there's no popup */
UINT oem = ::SetErrorMode(SEM_FAILCRITICALERRORS |
SEM_NOGPFAULTERRORBOX |
SEM_NOOPENFILEERRORBOX);
hDll = ::LoadLibrary("DSOUND.dll"); /* load the DLL */
::SetErrorMode(oem); /* restore previous error mode */
if (!hDll) /* if error loading the DLL */
return false; /* return with error */
static LPCSTR lpszFuncName[eFuncMax] =
{
"DirectSoundCaptureCreate",
"DirectSoundCreate",
"DirectSoundCaptureEnumerate",
"DirectSoundEnumerate",
};
for (int i = 0; i < eFuncMax; i++) /* now load all necessary functions */
{
CString sName = lpszFuncName[i];
proc[i] = GetProcAddress(hDll, sName);
if (!proc[i])
{
sName += "A";
proc[i] = GetProcAddress(hDll, sName);
}
}
return true; /* pass back OK */
}
/*****************************************************************************/
/* UnloadDll : removes the loaded DLL and all entry points */
/*****************************************************************************/
bool CDSoundDll::UnloadDll()
{
if (!hDll)
return true;
if (hDll)
FreeLibrary(hDll);
hDll = NULL;
for (int i = 0; i < eFuncMax; i++)
proc[i] = NULL;
return true;
}
/*****************************************************************************/
/* CaptureCreate : creates an input device */
/*****************************************************************************/
HRESULT CDSoundDll::CaptureCreate(LPGUID lpGUID, LPDIRECTSOUNDCAPTURE *lplpDSC, LPUNKNOWN pUnkOuter)
{
if (!proc[eFuncCaptureCreate])
return DSERR_INVALIDPARAM;
return ((HRESULT (WINAPI *)(LPGUID, LPDIRECTSOUNDCAPTURE *, LPUNKNOWN))
proc[eFuncCaptureCreate])(lpGUID, lplpDSC, pUnkOuter);
}
/*****************************************************************************/
/* Create : creates an output device */
/*****************************************************************************/
HRESULT CDSoundDll::Create(LPGUID lpGuid, LPDIRECTSOUND * ppDS, IUnknown FAR * pUnkOuter)
{
if (!proc[eFuncCreate])
return DSERR_INVALIDPARAM;
return ((HRESULT (WINAPI *)(LPGUID, LPDIRECTSOUND *, IUnknown FAR *))
proc[eFuncCreate])(lpGuid, ppDS, pUnkOuter);
}
/*****************************************************************************/
/* CaptureEnumerate : enumerates all capture devices if possible */
/*****************************************************************************/
HRESULT CDSoundDll::CaptureEnumerate(LPDSENUMCALLBACK lpDSEnumCallback, LPVOID lpContext)
{
if (!proc[eFuncCaptureEnumerate])
return DSERR_INVALIDPARAM;
return ((HRESULT (WINAPI *)(LPDSENUMCALLBACK,LPVOID))
proc[eFuncCaptureEnumerate])(lpDSEnumCallback, lpContext);
}
/*****************************************************************************/
/* Enumerate : enumerates all output devices if possible */
/*****************************************************************************/
HRESULT CDSoundDll::Enumerate(LPDSENUMCALLBACK lpDSEnumCallback, LPVOID lpContext)
{
if (!proc[eFuncEnumerate])
return DSERR_INVALIDPARAM;
return ((HRESULT (WINAPI *)(LPDSENUMCALLBACK,LPVOID))
proc[eFuncEnumerate])(lpDSEnumCallback, lpContext);
}
/*===========================================================================*/
/* Global Data needed in this module */
/*===========================================================================*/
static CDSoundDll dll; /* the one and only DirectSound DLL */
/*===========================================================================*/
/* CDSoundDeviceList class members */
/*===========================================================================*/
/*****************************************************************************/
/* CDSoundDeviceList : constructor */
/*****************************************************************************/
CDSoundDeviceList::CDSoundDeviceList()
{
}
/*****************************************************************************/
/* ~CDSoundDeviceList : destructor */
/*****************************************************************************/
CDSoundDeviceList::~CDSoundDeviceList()
{
for (int i = 0; i < Guids.GetSize(); i++)
if (Guids[i])
{
LPGUID pGuid = (LPGUID)Guids[i];
delete pGuid;
}
}
/*****************************************************************************/
/* EnumDevices : output enumeration */
/*****************************************************************************/
BOOL CALLBACK CDSoundDeviceList::EnumDevices
(
LPGUID lpGUID,
LPCTSTR lpszDesc,
LPCTSTR lpszDrvName,
LPVOID lpContext
)
{
CDSoundDeviceList *pList = (CDSoundDeviceList *)lpContext;
CString sOut;
LPGUID pcGuid = NULL;
if (lpGUID)
{
pcGuid = new GUID;
if (!pcGuid)
return FALSE;
*pcGuid = *lpGUID;
}
if (pList->Guids.Add(pcGuid) < 0)
{
if (pcGuid)
delete pcGuid;
return FALSE;
}
if (pList->Add(lpszDesc) < 0)
return FALSE;
if (pList->Names.Add(lpszDrvName))
return FALSE;
return TRUE;
}
/*****************************************************************************/
/* GetName : retrieves the driver name for a device */
/*****************************************************************************/
CString CDSoundDeviceList::GetName(int nDevNum)
{
if ((nDevNum < 0) || (nDevNum >= Guids.GetSize()))
return "";
return Names[nDevNum];
}
CString CDSoundDeviceList::GetName(LPCSTR lpszDesc)
{
for (int nDevNum = 0; nDevNum < GetSize(); nDevNum++)
if (GetAt(nDevNum) == lpszDesc)
return Names[nDevNum];
return "";
}
/*****************************************************************************/
/* GetGUID : returns the GUID for a device */
/*****************************************************************************/
LPGUID CDSoundDeviceList::GetGUID(int nDevNum)
{
if ((nDevNum < 0) || (nDevNum >= Guids.GetSize()))
return NULL;
return (LPGUID)Guids[nDevNum];
}
LPGUID CDSoundDeviceList::GetGUID(LPCSTR lpszDesc)
{
for (int nDevNum = 0; nDevNum < GetSize(); nDevNum++)
if (GetAt(nDevNum) == lpszDesc)
return (LPGUID)Guids[nDevNum];
return NULL;
}
/*===========================================================================*/
/* CDSoundInputList class members */
/*===========================================================================*/
/*****************************************************************************/
/* CDSoundInputList : constructor */
/*****************************************************************************/
CDSoundInputList::CDSoundInputList()
{
if (dll.CaptureEnumerate((LPDSENUMCALLBACK)EnumDevices, this) != DS_OK)
RemoveAll();
}
/*===========================================================================*/
/* CDSoundOutputList class members */
/*===========================================================================*/
/*****************************************************************************/
/* CDSoundOutputList : constructor */
/*****************************************************************************/
CDSoundOutputList::CDSoundOutputList()
{
if (dll.Enumerate((LPDSENUMCALLBACK)EnumDevices, this) != DS_OK)
RemoveAll();
}
/*===========================================================================*/
/* CDSoundDevice class members */
/*===========================================================================*/
/*****************************************************************************/
/* CDSoundDevice : constructor */
/*****************************************************************************/
CDSoundDevice::CDSoundDevice()
{
szDevName[0] = 0; /* reset device name */
hEvent = 0; /* no event handle allocated */
pEvtThread = 0; /* no event thread started */
bEvtCancel = FALSE; /* reset event thread cancel flag */
bIsOpen = FALSE; /* reset opened flag */
SetupWaveformat(&wf); /* default to 44.1kHz,16bit,stereo */
SetupSBDesc(&sbd, 0, 0, &wf); /* no meaningful values yet */
sbpn[ePosStart].dwOffset = 0; /* fill predefined positions */
sbpn[ePosStop].dwOffset = DSBPN_OFFSETSTOP;
}
/*****************************************************************************/
/* ~CDSoundDevice : destructor */
/*****************************************************************************/
CDSoundDevice::~CDSoundDevice()
{
Close();
KillEvt(); /* kill event thread & handle */
}
/*****************************************************************************/
/* SetupWaveformat : initializes a wave format buffer */
/*****************************************************************************/
void CDSoundDevice::SetupWaveformat
(
LPWAVEFORMATEX pwf,
DWORD dwSamplesPerSec,
WORD wBitsPerSample,
WORD nChannels
)
{
pwf->wFormatTag = WAVE_FORMAT_PCM;
pwf->nChannels = nChannels;
pwf->nSamplesPerSec = dwSamplesPerSec;
pwf->nAvgBytesPerSec = dwSamplesPerSec * nChannels * wBitsPerSample / 8;
pwf->nBlockAlign = nChannels * wBitsPerSample / 8;
pwf->wBitsPerSample = wBitsPerSample;
pwf->cbSize = 0;
}
/*****************************************************************************/
/* SetupSBDesc : set up a secondary buffer description */
/*****************************************************************************/
void CDSoundDevice::SetupSBDesc
(
LPDSCBUFFERDESC pbd, /* description to fill */
DWORD dwFlags, /* I/O specific flags */
DWORD dwSamples, /* buffer size in samples */
LPWAVEFORMATEX pwf /* buffer format */
)
{
pbd->dwSize = sizeof(DSCBUFFERDESC); /* set up size */
pbd->dwFlags = dwFlags; /* set up flags */
pbd->dwReserved = 0;
pbd->lpwfxFormat = (pwf) ? pwf : &wf; /* use external / internal format */
/* calculate buffer size in bytes */
DWORD dwCalcBuf = 2 * dwSamples; /* we use a double-buffering scheme */
dwCalcBuf *= pbd->lpwfxFormat->nBlockAlign;
pbd->dwBufferBytes = dwCalcBuf;
}
/*****************************************************************************/
/* Open : opens a specific device */
/*****************************************************************************/
BOOL CDSoundDevice::Open
(
LPCSTR lpszDesc,
DWORD dwFlags,
DWORD dwSamples, /* #samples in one buffer */
LPWAVEFORMATEX pwfx
)
{
LPGUID lpGuid = GetGuid(lpszDesc); /* try to get a GUID for that */
if (!lpGuid) /* if impossible */
return FALSE; /* return error */
/* otherwise setup buffer description*/
SetupSBDesc(&sbd, dwFlags, dwSamples, pwfx);
if (!Open(lpGuid)) /* and try to open the device */
return FALSE; /* upon error return error */
strcpy(szDevName, lpszDesc); /* remember the name */
OnOpen(); /* allow subclasses to react */
return TRUE; /* and pass back OK */
}
BOOL CDSoundDevice::Open(LPGUID lpGuid)
{
bIsOpen = TRUE; /* remember this has been opened */
return TRUE; /* pass back OK */
}
/*****************************************************************************/
/* ReadBuffer : reads one halfth of the double-buffer */
/*****************************************************************************/
BOOL CDSoundDevice::ReadBuffer(int nBuffer, LPVOID lpBuf, DWORD &rdwSamples)
{
if ((nBuffer < 0) || (nBuffer > 1) ||
(!IsOpen()) || (!sbd.lpwfxFormat))
return FALSE;
DWORD dwCopy = rdwSamples * sbd.lpwfxFormat->nBlockAlign;
if (dwCopy > sbpn[ePosMiddle].dwOffset)
dwCopy = sbpn[ePosMiddle].dwOffset;
rdwSamples = dwCopy / sbd.lpwfxFormat->nBlockAlign;
LPVOID lpBuf1, lpBuf2;
DWORD dwBytes1, dwBytes2;
if (!Lock(sbpn[nBuffer].dwOffset,
sbpn[ePosMiddle].dwOffset,
&lpBuf1, &dwBytes1,
&lpBuf2, &dwBytes2))
return FALSE;
memcpy(lpBuf, lpBuf1, dwCopy); /* CAN only be pointer 1 */
return Unlock(lpBuf1, dwBytes1, lpBuf2, dwBytes2);
}
/*****************************************************************************/
/* WriteBuffer : fills one halfth of the double-buffer */
/*****************************************************************************/
BOOL CDSoundDevice::WriteBuffer(int nBuffer, LPVOID lpBuf, DWORD &rdwSamples)
{
if ((nBuffer < 0) || (nBuffer > 1) ||
(!IsOpen()) || (!sbd.lpwfxFormat))
return FALSE;
DWORD dwCopy = rdwSamples * sbd.lpwfxFormat->nBlockAlign;
if (dwCopy > sbpn[ePosMiddle].dwOffset)
dwCopy = sbpn[ePosMiddle].dwOffset;
rdwSamples = dwCopy / sbd.lpwfxFormat->nBlockAlign;
LPVOID lpBuf1, lpBuf2;
DWORD dwBytes1, dwBytes2;
if (!Lock(sbpn[nBuffer].dwOffset,
sbpn[ePosMiddle].dwOffset,
&lpBuf1, &dwBytes1,
&lpBuf2, &dwBytes2))
return FALSE;
memcpy(lpBuf1, lpBuf, dwCopy); /* CAN only be pointer 1 */
return Unlock(lpBuf1, dwBytes1, lpBuf2, dwBytes2);
}
/*****************************************************************************/
/* Close : kill eventually running event thread */
/*****************************************************************************/
BOOL CDSoundDevice::Close()
{
Release(); /* release allocated objects */
KillEvt(); /* kill event thread & handle */
*szDevName = 0; /* reset device name */
bIsOpen = FALSE; /* remember we're closed */
return TRUE;
}
/*****************************************************************************/
/* EvtThreadProc : event thread procedure */
/*****************************************************************************/
UINT CDSoundDevice::EvtThreadProc(LPVOID pParam)
{
UINT result;
CDSoundDevice *pDev = (CDSoundDevice *)pParam;
while (!pDev->bEvtCancel)
{
result = WaitForSingleObject(pDev->hEvent, INFINITE);
if ((result == WAIT_OBJECT_0) &&
(!pDev->bEvtCancel))
{
if (pDev->IsStarted()) /* if driver is currently started */
{ /* find out where driver really is */
/* pass back the other buffer */
pDev->OnSwitch(1 - pDev->GetDriverBuf());
}
else /* otherwise */
pDev->OnStop(); /* this is a Stop event */
}
else
break;
}
pDev->bEvtCancel = FALSE;
return 0;
}
/*****************************************************************************/
/* StartEvt : creates an event handle & thread */
/*****************************************************************************/
BOOL CDSoundDevice::StartEvt()
{
int i;
KillEvt(); /* make sure none's there */
/* then create a new event handle */
hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);
if (!hEvent) /* upon error */
return FALSE; /* return error */
/* put it into notification handler */
for (i = 0; i < (sizeof(sbpn)/sizeof(sbpn[0])); i++)
sbpn[i].hEventNotify = hEvent;
/* then create the thread */
pEvtThread = AfxBeginThread(EvtThreadProc, this,
THREAD_PRIORITY_NORMAL, 0,
CREATE_SUSPENDED, NULL);
if (!pEvtThread) /* upon error */
{
KillEvt(); /* kill event handle */
return FALSE; /* and return error */
}
pEvtThread->m_bAutoDelete = TRUE; /* let it go! */
pEvtThread->ResumeThread();
return TRUE;
}
/*****************************************************************************/
/* KillEvt : kills an eventually running event thread & event handle */
/*****************************************************************************/
void CDSoundDevice::KillEvt()
{
if (hEvent) /* if event handle allocated */
{
TRACE0("Killing event thread\n");
if (pEvtThread) /* if thread still running */
{
bEvtCancel = TRUE; /* set cancel flag */
SetEvent(hEvent); /* tell thread to die */
while (bEvtCancel) /* wait until it does. */
{
TRACE0("Waiting for thread to stop\n");
Sleep(50);
}
pEvtThread = 0; /* and thread handle */
}
CloseHandle(hEvent); /* and close the event handle */
hEvent = 0; /* and reset it... */
}
}
/*****************************************************************************/
/* BoostPriority : increases the thread's priority */
/*****************************************************************************/
BOOL CDSoundDevice::BoostPriority()
{
if (pEvtThread)
{
pEvtThread->SetThreadPriority(THREAD_PRIORITY_ABOVE_NORMAL);
return TRUE;
}
return FALSE;
}
/*===========================================================================*/
/* CDSoundInDevice class members */
/*===========================================================================*/
/*****************************************************************************/
/* CDSoundInDevice : constructor */
/*****************************************************************************/
CDSoundInDevice::CDSoundInDevice()
{
lpDS = NULL;
lpDSB = NULL;
}
/*****************************************************************************/
/* ~CDSoundInDevice : destructor */
/*****************************************************************************/
CDSoundInDevice::~CDSoundInDevice()
{
}
/*****************************************************************************/
/* Open : opens the input device */
/*****************************************************************************/
BOOL CDSoundInDevice::Open(LPGUID lpGuid)
{
if (IsOpen()) /* if already open */
Close(); /* close the opened device */
/* create DirectSoundCapture instance*/
HRESULT hr = dll.CaptureCreate(lpGuid,
&lpDS,
NULL);
if (FAILED(hr)) /* if failed */
return FALSE;
/* create secondary buffer */
hr = lpDS->CreateCaptureBuffer((LPCDSCBUFFERDESC)&sbd, &lpDSB, NULL);
if (FAILED(hr)) /* upon error */
{
lpDSB = NULL; /* make sure pointer is correct */
Release(); /* release device */
return FALSE; /* and return error */
}
sbpn[ePosMiddle].dwOffset = /* set up notification positions */
sbd.dwBufferBytes >> 1;
#if 1
// got to find out whether this works... for now, just do as if it would...
/* set up notifications */
hr = lpDSB->QueryInterface(IID_IDirectSoundNotify, (LPVOID *)&lpDSN);
if (FAILED(hr)) /* upon error */
{
lpDSN = NULL; /* make sure the pointer is correct */
Release(); /* release device */
return FALSE; /* and return error */
}
hr = lpDSN->SetNotificationPositions(ePosMax, sbpn);
if (FAILED(hr)) /* if error */
{
Release(); /* release device */
return FALSE; /* and return with error */
}
#endif
return CDSoundDevice::Open(lpGuid); /* let base class do its job */
}
/*****************************************************************************/
/* IsStarted : returns whether the device is currently recording */
/*****************************************************************************/
BOOL CDSoundInDevice::IsStarted()
{
if (!lpDSB)
return FALSE;
DWORD dwStatus = 0;
lpDSB->GetStatus(&dwStatus);
return !!(dwStatus & DSCBSTATUS_CAPTURING);
}
/*****************************************************************************/
/* Start : start recording */
/*****************************************************************************/
BOOL CDSoundInDevice::Start(DWORD dwFlags)
{
if (!lpDSB)
return FALSE;
if (dwFlags == (DWORD)-1) /* if default flags */
dwFlags = DSCBSTART_LOOPING; /* start in loop mode */
return SUCCEEDED(lpDSB->Start(dwFlags));
}
/*****************************************************************************/
/* Stop : stops recording */
/*****************************************************************************/
BOOL CDSoundInDevice::Stop()
{
if (!lpDSB)
return FALSE;
return SUCCEEDED(lpDSB->Stop());
}
/*****************************************************************************/
/* Close : closes the current output device */
/*****************************************************************************/
BOOL CDSoundInDevice::Close()
{
Stop();
return CDSoundDevice::Close();
}
/*****************************************************************************/
/* GetDriverPos : get driver's current position */
/*****************************************************************************/
DWORD CDSoundInDevice::GetDriverPos()
{
if (!lpDSB)
return 0;
DWORD dwCapture, dwRead;
lpDSB->GetCurrentPosition(&dwCapture, &dwRead);
return dwCapture;
}
/*****************************************************************************/
/* GetBufferPos : get our own position */
/*****************************************************************************/
DWORD CDSoundInDevice::GetBufferPos()
{
if (!lpDSB)
return 0;
DWORD dwCapture, dwRead;
lpDSB->GetCurrentPosition(&dwCapture, &dwRead);
return dwRead;
}
/*****************************************************************************/
/* GetFormat : retrieves the currently configured format */
/*****************************************************************************/
BOOL CDSoundInDevice::GetFormat(LPWAVEFORMATEX lpWF)
{
if (!lpDSB)
return FALSE;
return SUCCEEDED(lpDSB->GetFormat(lpWF, sizeof(WAVEFORMATEX), NULL));
}
/*****************************************************************************/
/* GetGuid : returns the GUID for a device descriptor */
/*****************************************************************************/
LPGUID CDSoundInDevice::GetGuid(LPCSTR lpszDesc)
{
CDSoundInputList list;
LPGUID lpGuid = list.GetGUID(lpszDesc);
if (!lpGuid)
return NULL;
guid = *lpGuid;
return &guid;
}
/*****************************************************************************/
/* GetCaps : retrieves the device capabilities */
/*****************************************************************************/
BOOL CDSoundInDevice::GetCaps(LPDSCBCAPS lpDSCBCaps)
{
if (!lpDSB)
return FALSE;
lpDSCBCaps->dwSize = sizeof(DSCBCAPS);
return !FAILED(lpDSB->GetCaps(lpDSCBCaps));
}
/*****************************************************************************/
/* Lock : locks a range of bytes */
/*****************************************************************************/
BOOL CDSoundInDevice::Lock(DWORD dwCursor, DWORD dwBytes, LPVOID *lplpvPtr1, LPDWORD lpdwBytes1, LPVOID *lplpvPtr2, LPDWORD lpdwBytes2, DWORD dwFlags)
{
if (!lpDSB)
return FALSE;
return SUCCEEDED(lpDSB->Lock(dwCursor, dwBytes, lplpvPtr1, lpdwBytes1, lplpvPtr2, lpdwBytes2, dwFlags));
}
/*****************************************************************************/
/* Unlock : remnoves current lock */
/*****************************************************************************/
BOOL CDSoundInDevice::Unlock(LPVOID lpPtr1, DWORD dwBytes1, LPVOID lpPtr2, DWORD dwBytes2)
{
if (!lpDSB)
return FALSE;
return SUCCEEDED(lpDSB->Unlock(lpPtr1, dwBytes1, lpPtr2, dwBytes2));
}
/*****************************************************************************/
/* Release : releases the allocated */
/*****************************************************************************/
void CDSoundInDevice::Release()
{
if (lpDSN)
lpDSN->Release();
lpDSN = NULL;
if (lpDSB)
lpDSB->Release();
lpDSB = NULL;
if (lpDS)
lpDS->Release();
lpDS = NULL;
}
/*===========================================================================*/
/* CDSoundOutDevice class members */
/*===========================================================================*/
/*****************************************************************************/
/* CDSoundOutDevice : constructor */
/*****************************************************************************/
CDSoundOutDevice::CDSoundOutDevice()
{
lpDS = NULL;
lpDSB = NULL;
lpDSN = NULL;
}
/*****************************************************************************/
/* ~CDSoundOutDevice : destructor */
/*****************************************************************************/
CDSoundOutDevice::~CDSoundOutDevice()
{
}
/*****************************************************************************/
/* Open : opens the output device */
/*****************************************************************************/
BOOL CDSoundOutDevice::Open(LPGUID lpGuid)
{
if (IsOpen()) /* if already open */
Close(); /* close the opened device */
HRESULT hr = dll.Create(lpGuid, /* create DirectSound instance */
&lpDS,
NULL);
if (FAILED(hr)) /* upon error */
{
lpDS = NULL; /* reset DirectSound pointer */
return FALSE; /* and pass back error */
}
/* set cooperative level to normal */
hr = lpDS->SetCooperativeLevel(AfxGetMainWnd()->GetSafeHwnd(),
DSSCL_NORMAL);
if (FAILED(hr)) /* upon error */
{
lpDSB = NULL; /* make sure pointer is correct */
Release(); /* release device */
return FALSE; /* and return error */
}
/* create secondary buffer */
hr = lpDS->CreateSoundBuffer((LPCDSBUFFERDESC)&sbd, &lpDSB, NULL);
if (FAILED(hr)) /* upon error */
{
lpDSB = NULL; /* make sure pointer is correct */
Release(); /* release device */
return FALSE; /* and return error */
}
sbpn[ePosMiddle].dwOffset = /* set up notification positions */
sbd.dwBufferBytes >> 1;
if (sbd.dwFlags & DSBCAPS_CTRLPOSITIONNOTIFY)
{
#if 0
// this simply doesn't work. No idea why.
// Ah well, set up a timer for that...
/* set up notifications */
hr = lpDSB->QueryInterface(IID_IDirectSoundNotify, (LPVOID *)&lpDSN);
if (FAILED(hr)) /* upon error */
{
lpDSN = NULL; /* make sure the pointer is correct */
Release(); /* release device */
return FALSE; /* and return error */
}
hr = lpDSN->SetNotificationPositions(ePosMax, sbpn);
if (FAILED(hr))
{
Release();
return FALSE;
}
#else
// set up timer-based double-buffer handling?
// nah, we let input handle that
#endif
}
return CDSoundDevice::Open(lpGuid); /* let base class do its job */
}
/*****************************************************************************/
/* GetDriverPos : get driver's current position */
/*****************************************************************************/
DWORD CDSoundOutDevice::GetDriverPos()
{
if (!lpDSB)
return 0;
DWORD dwPlay, dwWrite;
lpDSB->GetCurrentPosition(&dwPlay, &dwWrite);
TRACE2("DSoundOutDevice::GetCurrentPosition(%d,%d)\n", dwPlay, dwWrite);
return dwPlay;
}
/*****************************************************************************/
/* SetDriverPos : sets the driver's current position */
/*****************************************************************************/
BOOL CDSoundOutDevice::SetDriverPos(DWORD dwPos)
{
if (!lpDSB)
return FALSE;
return SUCCEEDED(lpDSB->SetCurrentPosition(dwPos));
}
/*****************************************************************************/
/* GetBufferPos : get our own position */
/*****************************************************************************/
DWORD CDSoundOutDevice::GetBufferPos()
{
if (!lpDSB)
return 0;
DWORD dwPlay, dwWrite;
lpDSB->GetCurrentPosition(&dwPlay, &dwWrite);
TRACE2("DSoundOutDevice::GetCurrentPosition(%d,%d)\n", dwPlay, dwWrite);
return dwWrite;
}
/*****************************************************************************/
/* IsStarted : returns whether the device is currently playing */
/*****************************************************************************/
BOOL CDSoundOutDevice::IsStarted()
{
if (!lpDSB)
return FALSE;
DWORD dwStatus = 0;
lpDSB->GetStatus(&dwStatus);
return !!(dwStatus & DSBSTATUS_PLAYING);
}
/*****************************************************************************/
/* Start : start playing */
/*****************************************************************************/
BOOL CDSoundOutDevice::Start(DWORD dwFlags)
{
if (!lpDSB)
return FALSE;
if (dwFlags == (DWORD)-1) /* if default flags */
dwFlags = DSBPLAY_LOOPING; /* start in loop mode */
return SUCCEEDED(lpDSB->Play(0, 0, dwFlags));
}