ReactOS Development > Doxygen

00001 /*
00002  * COPYRIGHT:       See COPYING in the top level directory
00003  * PROJECT:         ReactOS Configuration of network devices
00004  * FILE:            dll/directx/dsound_new/secondary.c
00005  * PURPOSE:         Secondary IDirectSoundBuffer8 implementation
00006  *
00007  * PROGRAMMERS:     Johannes Anderwald (janderwald@reactos.org)
00008  */
00009 
00010 
00011 #include "precomp.h"
00012 
00013 typedef struct
00014 {
00015     const IDirectSoundBuffer8Vtbl *lpVtbl;
00016     LONG ref;
00017 
00018     LPFILTERINFO Filter;
00019     DWORD dwLevel;
00020     DWORD dwFlags;
00021     DWORD dwFrequency;
00022     DWORD BufferPosition;
00023     LONG Volume;
00024     LONG VolumePan;
00025     LPWAVEFORMATEX Format;
00026     PUCHAR Buffer;
00027     DWORD BufferSize;
00028     KSSTATE State;
00029     DWORD Flags;
00030     DWORD Position;
00031     DWORD PlayPosition;
00032 
00033     LPDIRECTSOUNDBUFFER8 PrimaryBuffer;
00034 
00035 
00036 }CDirectSoundBuffer, *LPCDirectSoundBuffer;
00037 
00038 HRESULT
00039 WINAPI
00040 SecondaryDirectSoundBuffer8Impl_fnQueryInterface(
00041     LPDIRECTSOUNDBUFFER8 iface,
00042     IN REFIID riid,
00043     LPVOID* ppobj)
00044 {
00045     LPOLESTR pStr;
00046     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00047 
00048     if (IsEqualIID(riid, &IID_IUnknown) ||
00049         IsEqualIID(riid, &IID_IDirectSoundBuffer) ||
00050         IsEqualIID(riid, &IID_IDirectSoundBuffer8))
00051     {
00052         *ppobj = (LPVOID)&This->lpVtbl;
00053         InterlockedIncrement(&This->ref);
00054         return S_OK;
00055     }
00056 
00057     if (SUCCEEDED(StringFromIID(riid, &pStr)))
00058     {
00059         DPRINT("No Interface for class %s\n", pStr);
00060         CoTaskMemFree(pStr);
00061     }
00062     return E_NOINTERFACE;
00063 }
00064 
00065 ULONG
00066 WINAPI
00067 SecondaryDirectSoundBuffer8Impl_fnAddRef(
00068     LPDIRECTSOUNDBUFFER8 iface)
00069 {
00070     ULONG ref;
00071     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00072 
00073     ref = InterlockedIncrement(&This->ref);
00074 
00075     return ref;
00076 
00077 }
00078 
00079 ULONG
00080 WINAPI
00081 SecondaryDirectSoundBuffer8Impl_fnRelease(
00082     LPDIRECTSOUNDBUFFER8 iface)
00083 {
00084     ULONG ref;
00085     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00086 
00087     ref = InterlockedDecrement(&(This->ref));
00088 
00089     if (!ref)
00090     {
00091         HeapFree(GetProcessHeap(), 0, This->Buffer);
00092         HeapFree(GetProcessHeap(), 0, This->Format);
00093         HeapFree(GetProcessHeap(), 0, This);
00094     }
00095 
00096     return ref;
00097 }
00098 
00099 HRESULT
00100 WINAPI
00101 SecondaryDirectSoundBuffer8Impl_fnGetCaps(
00102     LPDIRECTSOUNDBUFFER8 iface,
00103     LPDSBCAPS pDSBufferCaps)
00104 {
00105     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00106 
00107     if (!pDSBufferCaps)
00108     {
00109         /* invalid parameter */
00110         return DSERR_INVALIDPARAM;
00111     }
00112 
00113     if (pDSBufferCaps->dwSize < sizeof(DSBCAPS))
00114     {
00115         /* invalid buffer size */
00116         return DSERR_INVALIDPARAM;
00117     }
00118 
00119     /* get buffer details */
00120     pDSBufferCaps->dwUnlockTransferRate = 0;
00121     pDSBufferCaps->dwPlayCpuOverhead = 0;
00122     pDSBufferCaps->dwSize = This->BufferSize;
00123     pDSBufferCaps->dwFlags = This->dwFlags;
00124 
00125     return DS_OK;
00126 }
00127 
00128 HRESULT
00129 WINAPI
00130 SecondaryDirectSoundBuffer8Impl_fnGetCurrentPosition(
00131     LPDIRECTSOUNDBUFFER8 iface,
00132     LPDWORD pdwCurrentPlayCursor,
00133     LPDWORD pdwCurrentWriteCursor)
00134 {
00135     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00136 
00137     //DPRINT("SecondaryDirectSoundBuffer8Impl_fnGetCurrentPosition This %p Play %p Write %p\n", This, pdwCurrentPlayCursor, pdwCurrentWriteCursor);
00138 
00139     if (pdwCurrentWriteCursor)
00140     {
00141         *pdwCurrentWriteCursor = This->BufferPosition;
00142     }
00143 
00144     return PrimaryDirectSoundBuffer_GetPosition(This->PrimaryBuffer, pdwCurrentPlayCursor, NULL);
00145 }
00146 
00147 HRESULT
00148 WINAPI
00149 SecondaryDirectSoundBuffer8Impl_fnGetFormat(
00150     LPDIRECTSOUNDBUFFER8 iface,
00151     LPWAVEFORMATEX pwfxFormat,
00152     DWORD dwSizeAllocated,
00153     LPDWORD pdwSizeWritten)
00154 {
00155     DWORD FormatSize;
00156     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00157 
00158     FormatSize = sizeof(WAVEFORMATEX) + This->Format->cbSize;
00159 
00160     if (!pwfxFormat && !pdwSizeWritten)
00161     {
00162         /* invalid parameter */
00163         return DSERR_INVALIDPARAM;
00164     }
00165 
00166     if (!pwfxFormat)
00167     {
00168         /* return required format size */
00169         *pdwSizeWritten = FormatSize;
00170         return DS_OK;
00171     }
00172     else
00173     {
00174         if (dwSizeAllocated >= FormatSize)
00175         {
00176             /* copy format */
00177             CopyMemory(pwfxFormat, This->Format, FormatSize);
00178 
00179             if (pdwSizeWritten)
00180                 *pdwSizeWritten = FormatSize;
00181 
00182             return DS_OK;
00183         }
00184         /* buffer too small */
00185         if (pdwSizeWritten)
00186             *pdwSizeWritten = 0;
00187 
00188         return DSERR_INVALIDPARAM;
00189     }
00190 }
00191 
00192 HRESULT
00193 WINAPI
00194 SecondaryDirectSoundBuffer8Impl_fnGetVolume(
00195     LPDIRECTSOUNDBUFFER8 iface,
00196     LPLONG plVolume)
00197 {
00198     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00199 
00200     if (!plVolume)
00201     {
00202         /* invalid parameter */
00203         return DSERR_INVALIDPARAM;
00204     }
00205 
00206     /* get volume */
00207     *plVolume = This->Volume;
00208 
00209     return DS_OK;
00210 }
00211 
00212 HRESULT
00213 WINAPI
00214 SecondaryDirectSoundBuffer8Impl_fnGetPan(
00215     LPDIRECTSOUNDBUFFER8 iface,
00216     LPLONG plPan)
00217 {
00218     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00219 
00220     if (!plPan)
00221     {
00222         /* invalid parameter */
00223         return DSERR_INVALIDPARAM;
00224     }
00225 
00226     /* get frequency */
00227     *plPan = This->VolumePan;
00228 
00229     return DS_OK;
00230 }
00231 
00232 HRESULT
00233 WINAPI
00234 SecondaryDirectSoundBuffer8Impl_fnGetFrequency(
00235     LPDIRECTSOUNDBUFFER8 iface,
00236     LPDWORD pdwFrequency)
00237 {
00238     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00239 
00240     if (!pdwFrequency)
00241     {
00242         /* invalid parameter */
00243         return DSERR_INVALIDPARAM;
00244     }
00245 
00246     /* get frequency */
00247     *pdwFrequency = This->dwFrequency;
00248 
00249     return DS_OK;
00250 }
00251 
00252 HRESULT
00253 WINAPI
00254 SecondaryDirectSoundBuffer8Impl_fnGetStatus(
00255     LPDIRECTSOUNDBUFFER8 iface,
00256     LPDWORD pdwStatus)
00257 {
00258     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00259 
00260     if (!pdwStatus)
00261     {
00262         /* invalid parameter */
00263         return DSERR_INVALIDPARAM;
00264     }
00265 
00266     *pdwStatus = 0;
00267     if (This->State == KSSTATE_RUN || This->State == KSSTATE_ACQUIRE)
00268     {
00269         /* buffer is playing */
00270         *pdwStatus |= DSBSTATUS_PLAYING;
00271         if (This->Flags & DSBPLAY_LOOPING)
00272             *pdwStatus |= DSBSTATUS_LOOPING;
00273     }
00274 
00275     return DS_OK;
00276 }
00277 
00278 HRESULT
00279 WINAPI
00280 SecondaryDirectSoundBuffer8Impl_fnInitialize(
00281     LPDIRECTSOUNDBUFFER8 iface,
00282     LPDIRECTSOUND pDirectSound,
00283     LPCDSBUFFERDESC pcDSBufferDesc)
00284 {
00285     /* RTFM */
00286     return DSERR_ALREADYINITIALIZED;
00287 }
00288 
00289 HRESULT
00290 WINAPI
00291 SecondaryDirectSoundBuffer8Impl_fnLock(
00292     LPDIRECTSOUNDBUFFER8 iface,
00293     DWORD dwOffset,
00294     DWORD dwBytes,
00295     LPVOID *ppvAudioPtr1,
00296     LPDWORD pdwAudioBytes1,
00297     LPVOID *ppvAudioPtr2, 
00298     LPDWORD pdwAudioBytes2,
00299     DWORD dwFlags)
00300 {
00301     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00302 
00303     DPRINT("This %p dwOffset %u dwBytes %u ppvAudioPtr1 %p pdwAudioBytes1 %p ppvAudioPtr2 %p pdwAudioBytes2 %p dwFlags %x This->BufferSize %u\n",
00304            This, dwOffset, dwBytes, ppvAudioPtr1, pdwAudioBytes1, ppvAudioPtr2, pdwAudioBytes2, dwFlags, This->BufferSize);
00305 
00306     if (dwFlags == DSBLOCK_ENTIREBUFFER)
00307     {
00308         *ppvAudioPtr1 = (LPVOID)This->Buffer;
00309         *pdwAudioBytes1 = This->BufferSize;
00310         if (ppvAudioPtr2)
00311             *ppvAudioPtr2 = NULL;
00312         if (pdwAudioBytes2)
00313             *pdwAudioBytes2 = 0;
00314 
00315         return DS_OK;
00316     }
00317     else if (dwFlags == DSBLOCK_FROMWRITECURSOR)
00318     {
00319         UNIMPLEMENTED
00320         return DSERR_UNSUPPORTED;
00321     }
00322     else
00323     {
00324         ASSERT(dwOffset < This->BufferSize);
00325         ASSERT(dwBytes <= This->BufferSize);
00326 
00327         dwBytes = min(This->BufferSize - dwOffset, dwBytes);
00328 
00329         *ppvAudioPtr1 = This->Buffer + dwOffset;
00330         *pdwAudioBytes1 = dwBytes;
00331 
00332         This->BufferPosition = dwOffset + dwBytes;
00333 
00334         if (This->BufferPosition == This->BufferSize)
00335             This->BufferPosition = 0;
00336 
00337         if (ppvAudioPtr2)
00338             *ppvAudioPtr2 = NULL;
00339         if (pdwAudioBytes2)
00340             *pdwAudioBytes2 = 0;
00341 
00342         return DS_OK;
00343     }
00344 }
00345 
00346 HRESULT
00347 WINAPI
00348 SecondaryDirectSoundBuffer8Impl_fnPlay(
00349     LPDIRECTSOUNDBUFFER8 iface,
00350     DWORD dwReserved1,
00351     DWORD dwPriority,
00352     DWORD dwFlags)
00353 {
00354     HRESULT hResult;
00355     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00356 
00357     if (dwReserved1 != 0)
00358     {
00359         /* must be zero */
00360         return DSERR_INVALIDPARAM;
00361     }
00362 
00363     /* sanity check */
00364     ASSERT(dwFlags & DSBPLAY_LOOPING);
00365 
00366 
00367     if (This->State == KSSTATE_RUN)
00368     {
00369         /* sound buffer is already playing */
00370         return DS_OK;
00371     }
00372 
00373     /* set dataformat */
00374     hResult = PrimaryDirectSoundBuffer_SetFormat(This->PrimaryBuffer, This->Format, TRUE);
00375 
00376     if (!SUCCEEDED(hResult))
00377     {
00378         /* failed */
00379         DPRINT1("Failed to set format Tag %u Samples %u Bytes %u nChannels %u\n", This->Format->wFormatTag, This->Format->nSamplesPerSec, This->Format->wBitsPerSample, This->Format->nChannels);
00380         return hResult;
00381     }
00382 
00383     /* start primary buffer */
00384     PrimaryDirectSoundBuffer_SetState(This->PrimaryBuffer, KSSTATE_RUN);
00385     /* acquire primary buffer */
00386     PrimaryDirectSoundBuffer_AcquireLock(This->PrimaryBuffer);
00387     /* HACK write buffer */
00388     PrimaryDirectSoundBuffer_Write(This->PrimaryBuffer, This->Buffer, This->BufferSize);
00389     /* release primary buffer */
00390     PrimaryDirectSoundBuffer_ReleaseLock(This->PrimaryBuffer);
00391 
00392     DPRINT("SetFormatSuccess PrimaryBuffer %p\n", This->PrimaryBuffer);
00393     This->State = KSSTATE_RUN;
00394 
00395     return DS_OK;
00396 }
00397 
00398 HRESULT
00399 WINAPI
00400 SecondaryDirectSoundBuffer8Impl_fnSetCurrentPosition(
00401     LPDIRECTSOUNDBUFFER8 iface,
00402     DWORD dwNewPosition)
00403 {
00404     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00405 
00406     DPRINT("Setting position %u\n", dwNewPosition);
00407     This->Position = dwNewPosition;
00408 
00409     return DS_OK;
00410 }
00411 
00412 HRESULT
00413 WINAPI
00414 SecondaryDirectSoundBuffer8Impl_fnSetFormat(
00415     LPDIRECTSOUNDBUFFER8 iface,
00416     LPCWAVEFORMATEX pcfxFormat)
00417 {
00418     /* RTFM */
00419     return DSERR_INVALIDCALL;
00420 }
00421 
00422 HRESULT
00423 WINAPI
00424 SecondaryDirectSoundBuffer8Impl_fnSetVolume(
00425     LPDIRECTSOUNDBUFFER8 iface,
00426     LONG lVolume)
00427 {
00428     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00429 
00430     if (lVolume < DSBVOLUME_MIN || lVolume > DSBVOLUME_MAX)
00431     {
00432         /* invalid parameter */
00433         return DSERR_INVALIDPARAM;
00434     }
00435 
00436 
00437     /* Store volume */
00438     This->Volume = lVolume;
00439 
00440     return DS_OK;
00441 }
00442 
00443 HRESULT
00444 WINAPI
00445 SecondaryDirectSoundBuffer8Impl_fnSetPan(
00446     LPDIRECTSOUNDBUFFER8 iface,
00447     LONG lPan)
00448 {
00449     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00450 
00451     if (lPan < DSBPAN_LEFT || lPan > DSBPAN_RIGHT)
00452     {
00453         /* invalid parameter */
00454         return DSERR_INVALIDPARAM;
00455     }
00456 
00457     /* Store volume pan */
00458     This->VolumePan = lPan;
00459 
00460     return DS_OK;
00461 }
00462 
00463 HRESULT
00464 WINAPI
00465 SecondaryDirectSoundBuffer8Impl_fnSetFrequency(
00466     LPDIRECTSOUNDBUFFER8 iface,
00467     DWORD dwFrequency)
00468 {
00469     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00470 
00471     if (dwFrequency == DSBFREQUENCY_ORIGINAL)
00472     {
00473         /* restore original frequency */
00474         dwFrequency = This->Format->nSamplesPerSec;
00475     }
00476 
00477     if (dwFrequency < DSBFREQUENCY_MIN || dwFrequency > DSBFREQUENCY_MAX)
00478     {
00479         /* invalid frequency */
00480         return DSERR_INVALIDPARAM;
00481     }
00482 
00483     if (dwFrequency != This->dwFrequency)
00484     {
00485         /* FIXME handle frequency change */
00486     }
00487 
00488     /* store frequency */
00489     This->dwFrequency = dwFrequency;
00490 
00491     return DS_OK;
00492 }
00493 
00494 HRESULT
00495 WINAPI
00496 SecondaryDirectSoundBuffer8Impl_fnStop(
00497     LPDIRECTSOUNDBUFFER8 iface)
00498 {
00499     LPCDirectSoundBuffer This = (LPCDirectSoundBuffer)CONTAINING_RECORD(iface, CDirectSoundBuffer, lpVtbl);
00500 
00501     PrimaryDirectSoundBuffer_SetState(This->PrimaryBuffer, KSSTATE_PAUSE);
00502     PrimaryDirectSoundBuffer_SetState(This->PrimaryBuffer, KSSTATE_ACQUIRE);
00503     PrimaryDirectSoundBuffer_SetState(This->PrimaryBuffer, KSSTATE_STOP);
00504 
00505     DPRINT("SecondaryDirectSoundBuffer8Impl_fnStop\n");
00506 
00507 
00508     /* set state to stop */
00509     This->State = KSSTATE_STOP;
00510     This->BufferPosition = 0;
00511 
00512     return DS_OK;
00513 }
00514 
00515 
00516 HRESULT
00517 WINAPI
00518 SecondaryDirectSoundBuffer8Impl_fnUnlock(
00519     LPDIRECTSOUNDBUFFER8 iface,
00520     LPVOID pvAudioPtr1,
00521     DWORD dwAudioBytes1,
00522     LPVOID pvAudioPtr2,
00523     DWORD dwAudioBytes2)
00524 {
00525     //DPRINT("SecondaryDirectSoundBuffer8Impl_fnUnlock pvAudioPtr1 %p dwAudioBytes1 %u pvAudioPtr2 %p dwAudioBytes2 %u Unimplemented\n");
00526     return DS_OK;
00527 }
00528 
00529 
00530 
00531 
00532 HRESULT
00533 WINAPI
00534 SecondaryDirectSoundBuffer8Impl_fnRestore(
00535     LPDIRECTSOUNDBUFFER8 iface)
00536 {
00537     UNIMPLEMENTED
00538     return DSERR_INVALIDPARAM;
00539 }
00540 
00541 
00542 HRESULT
00543 WINAPI
00544 SecondaryDirectSoundBuffer8Impl_fnSetFX(
00545     LPDIRECTSOUNDBUFFER8 iface,
00546     DWORD dwEffectsCount, 
00547     LPDSEFFECTDESC pDSFXDesc,
00548     LPDWORD pdwResultCodes)
00549 {
00550     UNIMPLEMENTED
00551     return DSERR_INVALIDPARAM;
00552 }
00553 
00554 HRESULT
00555 WINAPI
00556 SecondaryDirectSoundBuffer8Impl_fnAcquireResources(
00557     LPDIRECTSOUNDBUFFER8 iface,
00558     DWORD dwFlags,
00559     DWORD dwEffectsCount, 
00560     LPDWORD pdwResultCodes)
00561 {
00562     UNIMPLEMENTED
00563     return DSERR_INVALIDPARAM;
00564 }
00565 
00566 HRESULT
00567 WINAPI
00568 SecondaryDirectSoundBuffer8Impl_fnGetObjectInPath(
00569     LPDIRECTSOUNDBUFFER8 iface,
00570     REFGUID rguidObject,
00571     DWORD dwIndex,
00572     REFGUID rguidInterface,
00573     LPVOID *ppObject)
00574 {
00575     UNIMPLEMENTED
00576     return DSERR_INVALIDPARAM;
00577 }
00578 
00579 static IDirectSoundBuffer8Vtbl vt_DirectSoundBuffer8 =
00580 {
00581     /* IUnknown methods */
00582     SecondaryDirectSoundBuffer8Impl_fnQueryInterface,
00583     SecondaryDirectSoundBuffer8Impl_fnAddRef,
00584     SecondaryDirectSoundBuffer8Impl_fnRelease,
00585     /* IDirectSoundBuffer methods */
00586     SecondaryDirectSoundBuffer8Impl_fnGetCaps,
00587     SecondaryDirectSoundBuffer8Impl_fnGetCurrentPosition,
00588     SecondaryDirectSoundBuffer8Impl_fnGetFormat,
00589     SecondaryDirectSoundBuffer8Impl_fnGetVolume,
00590     SecondaryDirectSoundBuffer8Impl_fnGetPan,
00591     SecondaryDirectSoundBuffer8Impl_fnGetFrequency,
00592     SecondaryDirectSoundBuffer8Impl_fnGetStatus,
00593     SecondaryDirectSoundBuffer8Impl_fnInitialize,
00594     SecondaryDirectSoundBuffer8Impl_fnLock,
00595     SecondaryDirectSoundBuffer8Impl_fnPlay,
00596     SecondaryDirectSoundBuffer8Impl_fnSetCurrentPosition,
00597     SecondaryDirectSoundBuffer8Impl_fnSetFormat,
00598     SecondaryDirectSoundBuffer8Impl_fnSetVolume,
00599     SecondaryDirectSoundBuffer8Impl_fnSetPan,
00600     SecondaryDirectSoundBuffer8Impl_fnSetFrequency,
00601     SecondaryDirectSoundBuffer8Impl_fnStop,
00602     SecondaryDirectSoundBuffer8Impl_fnUnlock,
00603     SecondaryDirectSoundBuffer8Impl_fnRestore,
00604     /* IDirectSoundBuffer8 methods */
00605     SecondaryDirectSoundBuffer8Impl_fnSetFX,
00606     SecondaryDirectSoundBuffer8Impl_fnAcquireResources,
00607     SecondaryDirectSoundBuffer8Impl_fnGetObjectInPath
00608 };
00609 
00610 HRESULT
00611 NewSecondarySoundBuffer(
00612     LPDIRECTSOUNDBUFFER8 *OutBuffer,
00613     LPFILTERINFO Filter,
00614     DWORD dwLevel,
00615     LPCDSBUFFERDESC lpcDSBufferDesc,
00616     LPDIRECTSOUNDBUFFER8 PrimaryBuffer)
00617 {
00618     ULONG FormatSize;
00619     LPCDirectSoundBuffer This = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(CDirectSoundBuffer));
00620 
00621     if (!This)
00622     {
00623         /* not enough memory */
00624         return DSERR_OUTOFMEMORY;
00625     }
00626 
00627     FormatSize = sizeof(WAVEFORMATEX) + lpcDSBufferDesc->lpwfxFormat->cbSize;
00628 
00629     This->Format = HeapAlloc(GetProcessHeap(), 0, FormatSize);
00630     if (!This->Format)
00631     {
00632         /* not enough memory */
00633         HeapFree(GetProcessHeap(), 0, This);
00634         return DSERR_OUTOFMEMORY;
00635     }
00636 
00637     /* sanity check */
00638     ASSERT(lpcDSBufferDesc->dwBufferBytes);
00639 
00640     /* allocate sound buffer */
00641     This->Buffer = HeapAlloc(GetProcessHeap(), 0, lpcDSBufferDesc->dwBufferBytes);
00642     if (!This->Buffer)
00643     {
00644         /* not enough memory */
00645         HeapFree(GetProcessHeap(), 0, This->Format);
00646         HeapFree(GetProcessHeap(), 0, This);
00647         return DSERR_OUTOFMEMORY;
00648     }
00649 
00650     /* fill buffer with silence */
00651     FillMemory(This->Buffer, lpcDSBufferDesc->dwBufferBytes, lpcDSBufferDesc->lpwfxFormat->wBitsPerSample == 8 ? 0x80 : 0);
00652 
00653     This->ref = 1;
00654     This->lpVtbl = &vt_DirectSoundBuffer8;
00655     This->Filter = Filter;
00656     This->dwLevel = dwLevel;
00657     This->dwFlags = lpcDSBufferDesc->dwFlags;
00658     This->dwFrequency = lpcDSBufferDesc->lpwfxFormat->nSamplesPerSec;
00659     This->State = KSSTATE_STOP;
00660     This->Volume = DSBVOLUME_MAX;
00661     This->VolumePan = DSBPAN_CENTER;
00662     This->Flags = 0;
00663     This->Position = 0;
00664     This->BufferSize = lpcDSBufferDesc->dwBufferBytes;
00665     This->PrimaryBuffer = PrimaryBuffer;
00666 
00667     CopyMemory(This->Format, lpcDSBufferDesc->lpwfxFormat, FormatSize);
00668 
00669     *OutBuffer = (LPDIRECTSOUNDBUFFER8)&This->lpVtbl;
00670     return DS_OK;
00671 }
00672
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