rlm@0: /**
rlm@0:  * OpenAL cross platform audio library
rlm@0:  * Copyright (C) 1999-2007 by authors.
rlm@0:  * This library is free software; you can redistribute it and/or
rlm@0:  *  modify it under the terms of the GNU Library General Public
rlm@0:  *  License as published by the Free Software Foundation; either
rlm@0:  *  version 2 of the License, or (at your option) any later version.
rlm@0:  *
rlm@0:  * This library is distributed in the hope that it will be useful,
rlm@0:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
rlm@0:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
rlm@0:  *  Library General Public License for more details.
rlm@0:  *
rlm@0:  * You should have received a copy of the GNU Library General Public
rlm@0:  *  License along with this library; if not, write to the
rlm@0:  *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
rlm@0:  *  Boston, MA  02111-1307, USA.
rlm@0:  * Or go to http://www.gnu.org/copyleft/lgpl.html
rlm@0:  */
rlm@0: 
rlm@0: #include "config.h"
rlm@0: 
rlm@0: #define _WIN32_WINNT 0x0500
rlm@0: #include <stdlib.h>
rlm@0: #include <stdio.h>
rlm@0: #include <memory.h>
rlm@0: 
rlm@0: #include <dsound.h>
rlm@0: #include <cguid.h>
rlm@0: #include <mmreg.h>
rlm@0: #ifndef _WAVEFORMATEXTENSIBLE_
rlm@0: #include <ks.h>
rlm@0: #include <ksmedia.h>
rlm@0: #endif
rlm@0: 
rlm@0: #include "alMain.h"
rlm@0: #include "AL/al.h"
rlm@0: #include "AL/alc.h"
rlm@0: 
rlm@0: #ifndef DSSPEAKER_5POINT1
rlm@0: #define DSSPEAKER_5POINT1       6
rlm@0: #endif
rlm@0: #ifndef DSSPEAKER_7POINT1
rlm@0: #define DSSPEAKER_7POINT1       7
rlm@0: #endif
rlm@0: 
rlm@0: DEFINE_GUID(KSDATAFORMAT_SUBTYPE_PCM, 0x00000001, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
rlm@0: DEFINE_GUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
rlm@0: 
rlm@0: 
rlm@0: static HMODULE ds_handle;
rlm@0: static HRESULT (WINAPI *pDirectSoundCreate)(LPCGUID pcGuidDevice, IDirectSound **ppDS, IUnknown *pUnkOuter);
rlm@0: static HRESULT (WINAPI *pDirectSoundEnumerateA)(LPDSENUMCALLBACKA pDSEnumCallback, void *pContext);
rlm@0: 
rlm@0: #define DirectSoundCreate     pDirectSoundCreate
rlm@0: #define DirectSoundEnumerateA pDirectSoundEnumerateA
rlm@0: 
rlm@0: 
rlm@0: typedef struct {
rlm@0:     // DirectSound Playback Device
rlm@0:     IDirectSound       *lpDS;
rlm@0:     IDirectSoundBuffer *DSpbuffer;
rlm@0:     IDirectSoundBuffer *DSsbuffer;
rlm@0:     IDirectSoundNotify *DSnotify;
rlm@0:     HANDLE             hNotifyEvent;
rlm@0: 
rlm@0:     volatile int killNow;
rlm@0:     ALvoid *thread;
rlm@0: } DSoundData;
rlm@0: 
rlm@0: 
rlm@0: typedef struct {
rlm@0:     ALCchar *name;
rlm@0:     GUID guid;
rlm@0: } DevMap;
rlm@0: 
rlm@0: static const ALCchar dsDevice[] = "DirectSound Default";
rlm@0: static DevMap *DeviceList;
rlm@0: static ALuint NumDevices;
rlm@0: 
rlm@0: #define MAX_UPDATES 128
rlm@0: 
rlm@0: static ALCboolean DSoundLoad(void)
rlm@0: {
rlm@0:     ALCboolean ok = ALC_TRUE;
rlm@0:     if(!ds_handle)
rlm@0:     {
rlm@0:         ds_handle = LoadLibraryA("dsound.dll");
rlm@0:         if(ds_handle == NULL)
rlm@0:         {
rlm@0:             ERR("Failed to load dsound.dll\n");
rlm@0:             return ALC_FALSE;
rlm@0:         }
rlm@0: 
rlm@0: #define LOAD_FUNC(x) do {                                                     \
rlm@0:     if((p##x = (void*)GetProcAddress(ds_handle, #x)) == NULL) {               \
rlm@0:         ERR("Could not load %s from dsound.dll\n", #x);                       \
rlm@0:         ok = ALC_FALSE;                                                       \
rlm@0:     }                                                                         \
rlm@0: } while(0)
rlm@0:         LOAD_FUNC(DirectSoundCreate);
rlm@0:         LOAD_FUNC(DirectSoundEnumerateA);
rlm@0: #undef LOAD_FUNC
rlm@0: 
rlm@0:         if(!ok)
rlm@0:         {
rlm@0:             FreeLibrary(ds_handle);
rlm@0:             ds_handle = NULL;
rlm@0:         }
rlm@0:     }
rlm@0:     return ok;
rlm@0: }
rlm@0: 
rlm@0: 
rlm@0: static BOOL CALLBACK DSoundEnumDevices(LPGUID guid, LPCSTR desc, LPCSTR drvname, LPVOID data)
rlm@0: {
rlm@0:     char str[1024];
rlm@0:     void *temp;
rlm@0:     int count;
rlm@0:     ALuint i;
rlm@0: 
rlm@0:     (void)data;
rlm@0:     (void)drvname;
rlm@0: 
rlm@0:     if(!guid)
rlm@0:         return TRUE;
rlm@0: 
rlm@0:     count = 0;
rlm@0:     do {
rlm@0:         if(count == 0)
rlm@0:             snprintf(str, sizeof(str), "%s", desc);
rlm@0:         else
rlm@0:             snprintf(str, sizeof(str), "%s #%d", desc, count+1);
rlm@0:         count++;
rlm@0: 
rlm@0:         for(i = 0;i < NumDevices;i++)
rlm@0:         {
rlm@0:             if(strcmp(str, DeviceList[i].name) == 0)
rlm@0:                 break;
rlm@0:         }
rlm@0:     } while(i != NumDevices);
rlm@0: 
rlm@0:     temp = realloc(DeviceList, sizeof(DevMap) * (NumDevices+1));
rlm@0:     if(temp)
rlm@0:     {
rlm@0:         DeviceList = temp;
rlm@0:         DeviceList[NumDevices].name = strdup(str);
rlm@0:         DeviceList[NumDevices].guid = *guid;
rlm@0:         NumDevices++;
rlm@0:     }
rlm@0: 
rlm@0:     return TRUE;
rlm@0: }
rlm@0: 
rlm@0: 
rlm@0: static ALuint DSoundProc(ALvoid *ptr)
rlm@0: {
rlm@0:     ALCdevice *pDevice = (ALCdevice*)ptr;
rlm@0:     DSoundData *pData = (DSoundData*)pDevice->ExtraData;
rlm@0:     DSBCAPS DSBCaps;
rlm@0:     DWORD LastCursor = 0;
rlm@0:     DWORD PlayCursor;
rlm@0:     VOID *WritePtr1, *WritePtr2;
rlm@0:     DWORD WriteCnt1,  WriteCnt2;
rlm@0:     BOOL Playing = FALSE;
rlm@0:     DWORD FrameSize;
rlm@0:     DWORD FragSize;
rlm@0:     DWORD avail;
rlm@0:     HRESULT err;
rlm@0: 
rlm@0:     SetRTPriority();
rlm@0: 
rlm@0:     memset(&DSBCaps, 0, sizeof(DSBCaps));
rlm@0:     DSBCaps.dwSize = sizeof(DSBCaps);
rlm@0:     err = IDirectSoundBuffer_GetCaps(pData->DSsbuffer, &DSBCaps);
rlm@0:     if(FAILED(err))
rlm@0:     {
rlm@0:         ERR("Failed to get buffer caps: 0x%lx\n", err);
rlm@0:         aluHandleDisconnect(pDevice);
rlm@0:         return 1;
rlm@0:     }
rlm@0: 
rlm@0:     FrameSize = FrameSizeFromDevFmt(pDevice->FmtChans, pDevice->FmtType);
rlm@0:     FragSize = pDevice->UpdateSize * FrameSize;
rlm@0: 
rlm@0:     IDirectSoundBuffer_GetCurrentPosition(pData->DSsbuffer, &LastCursor, NULL);
rlm@0:     while(!pData->killNow)
rlm@0:     {
rlm@0:         // Get current play cursor
rlm@0:         IDirectSoundBuffer_GetCurrentPosition(pData->DSsbuffer, &PlayCursor, NULL);
rlm@0:         avail = (PlayCursor-LastCursor+DSBCaps.dwBufferBytes) % DSBCaps.dwBufferBytes;
rlm@0: 
rlm@0:         if(avail < FragSize)
rlm@0:         {
rlm@0:             if(!Playing)
rlm@0:             {
rlm@0:                 err = IDirectSoundBuffer_Play(pData->DSsbuffer, 0, 0, DSBPLAY_LOOPING);
rlm@0:                 if(FAILED(err))
rlm@0:                 {
rlm@0:                     ERR("Failed to play buffer: 0x%lx\n", err);
rlm@0:                     aluHandleDisconnect(pDevice);
rlm@0:                     return 1;
rlm@0:                 }
rlm@0:                 Playing = TRUE;
rlm@0:             }
rlm@0: 
rlm@0:             avail = WaitForSingleObjectEx(pData->hNotifyEvent, 2000, FALSE);
rlm@0:             if(avail != WAIT_OBJECT_0)
rlm@0:                 ERR("WaitForSingleObjectEx error: 0x%lx\n", avail);
rlm@0:             continue;
rlm@0:         }
rlm@0:         avail -= avail%FragSize;
rlm@0: 
rlm@0:         // Lock output buffer
rlm@0:         WriteCnt1 = 0;
rlm@0:         WriteCnt2 = 0;
rlm@0:         err = IDirectSoundBuffer_Lock(pData->DSsbuffer, LastCursor, avail, &WritePtr1, &WriteCnt1, &WritePtr2, &WriteCnt2, 0);
rlm@0: 
rlm@0:         // If the buffer is lost, restore it and lock
rlm@0:         if(err == DSERR_BUFFERLOST)
rlm@0:         {
rlm@0:             WARN("Buffer lost, restoring...\n");
rlm@0:             err = IDirectSoundBuffer_Restore(pData->DSsbuffer);
rlm@0:             if(SUCCEEDED(err))
rlm@0:             {
rlm@0:                 Playing = FALSE;
rlm@0:                 LastCursor = 0;
rlm@0:                 err = IDirectSoundBuffer_Lock(pData->DSsbuffer, 0, DSBCaps.dwBufferBytes, &WritePtr1, &WriteCnt1, &WritePtr2, &WriteCnt2, 0);
rlm@0:             }
rlm@0:         }
rlm@0: 
rlm@0:         // Successfully locked the output buffer
rlm@0:         if(SUCCEEDED(err))
rlm@0:         {
rlm@0:             // If we have an active context, mix data directly into output buffer otherwise fill with silence
rlm@0:             aluMixData(pDevice, WritePtr1, WriteCnt1/FrameSize);
rlm@0:             aluMixData(pDevice, WritePtr2, WriteCnt2/FrameSize);
rlm@0: 
rlm@0:             // Unlock output buffer only when successfully locked
rlm@0:             IDirectSoundBuffer_Unlock(pData->DSsbuffer, WritePtr1, WriteCnt1, WritePtr2, WriteCnt2);
rlm@0:         }
rlm@0:         else
rlm@0:         {
rlm@0:             ERR("Buffer lock error: %#lx\n", err);
rlm@0:             aluHandleDisconnect(pDevice);
rlm@0:             return 1;
rlm@0:         }
rlm@0: 
rlm@0:         // Update old write cursor location
rlm@0:         LastCursor += WriteCnt1+WriteCnt2;
rlm@0:         LastCursor %= DSBCaps.dwBufferBytes;
rlm@0:     }
rlm@0: 
rlm@0:     return 0;
rlm@0: }
rlm@0: 
rlm@0: static ALCboolean DSoundOpenPlayback(ALCdevice *device, const ALCchar *deviceName)
rlm@0: {
rlm@0:     DSoundData *pData = NULL;
rlm@0:     LPGUID guid = NULL;
rlm@0:     HRESULT hr;
rlm@0: 
rlm@0:     if(!deviceName)
rlm@0:         deviceName = dsDevice;
rlm@0:     else if(strcmp(deviceName, dsDevice) != 0)
rlm@0:     {
rlm@0:         ALuint i;
rlm@0: 
rlm@0:         if(!DeviceList)
rlm@0:         {
rlm@0:             hr = DirectSoundEnumerateA(DSoundEnumDevices, NULL);
rlm@0:             if(FAILED(hr))
rlm@0:                 ERR("Error enumerating DirectSound devices (%#x)!\n", (unsigned int)hr);
rlm@0:         }
rlm@0: 
rlm@0:         for(i = 0;i < NumDevices;i++)
rlm@0:         {
rlm@0:             if(strcmp(deviceName, DeviceList[i].name) == 0)
rlm@0:             {
rlm@0:                 guid = &DeviceList[i].guid;
rlm@0:                 break;
rlm@0:             }
rlm@0:         }
rlm@0:         if(i == NumDevices)
rlm@0:             return ALC_FALSE;
rlm@0:     }
rlm@0: 
rlm@0:     //Initialise requested device
rlm@0:     pData = calloc(1, sizeof(DSoundData));
rlm@0:     if(!pData)
rlm@0:     {
rlm@0:         alcSetError(device, ALC_OUT_OF_MEMORY);
rlm@0:         return ALC_FALSE;
rlm@0:     }
rlm@0: 
rlm@0:     hr = DS_OK;
rlm@0:     pData->hNotifyEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
rlm@0:     if(pData->hNotifyEvent == NULL)
rlm@0:         hr = E_FAIL;
rlm@0: 
rlm@0:     //DirectSound Init code
rlm@0:     if(SUCCEEDED(hr))
rlm@0:         hr = DirectSoundCreate(guid, &pData->lpDS, NULL);
rlm@0:     if(SUCCEEDED(hr))
rlm@0:         hr = IDirectSound_SetCooperativeLevel(pData->lpDS, GetForegroundWindow(), DSSCL_PRIORITY);
rlm@0:     if(FAILED(hr))
rlm@0:     {
rlm@0:         if(pData->lpDS)
rlm@0:             IDirectSound_Release(pData->lpDS);
rlm@0:         if(pData->hNotifyEvent)
rlm@0:             CloseHandle(pData->hNotifyEvent);
rlm@0:         free(pData);
rlm@0:         ERR("Device init failed: 0x%08lx\n", hr);
rlm@0:         return ALC_FALSE;
rlm@0:     }
rlm@0: 
rlm@0:     device->szDeviceName = strdup(deviceName);
rlm@0:     device->ExtraData = pData;
rlm@0:     return ALC_TRUE;
rlm@0: }
rlm@0: 
rlm@0: static void DSoundClosePlayback(ALCdevice *device)
rlm@0: {
rlm@0:     DSoundData *pData = device->ExtraData;
rlm@0: 
rlm@0:     IDirectSound_Release(pData->lpDS);
rlm@0:     CloseHandle(pData->hNotifyEvent);
rlm@0:     free(pData);
rlm@0:     device->ExtraData = NULL;
rlm@0: }
rlm@0: 
rlm@0: static ALCboolean DSoundResetPlayback(ALCdevice *device)
rlm@0: {
rlm@0:     DSoundData *pData = (DSoundData*)device->ExtraData;
rlm@0:     DSBUFFERDESC DSBDescription;
rlm@0:     WAVEFORMATEXTENSIBLE OutputType;
rlm@0:     DWORD speakers;
rlm@0:     HRESULT hr;
rlm@0: 
rlm@0:     memset(&OutputType, 0, sizeof(OutputType));
rlm@0: 
rlm@0:     switch(device->FmtType)
rlm@0:     {
rlm@0:         case DevFmtByte:
rlm@0:             device->FmtType = DevFmtUByte;
rlm@0:             break;
rlm@0:         case DevFmtUShort:
rlm@0:             device->FmtType = DevFmtShort;
rlm@0:             break;
rlm@0:         case DevFmtUByte:
rlm@0:         case DevFmtShort:
rlm@0:         case DevFmtFloat:
rlm@0:             break;
rlm@0:     }
rlm@0: 
rlm@0:     hr = IDirectSound_GetSpeakerConfig(pData->lpDS, &speakers);
rlm@0:     if(SUCCEEDED(hr))
rlm@0:     {
rlm@0:         if(!(device->Flags&DEVICE_CHANNELS_REQUEST))
rlm@0:         {
rlm@0:             speakers = DSSPEAKER_CONFIG(speakers);
rlm@0:             if(speakers == DSSPEAKER_MONO)
rlm@0:                 device->FmtChans = DevFmtMono;
rlm@0:             else if(speakers == DSSPEAKER_STEREO || speakers == DSSPEAKER_HEADPHONE)
rlm@0:                 device->FmtChans = DevFmtStereo;
rlm@0:             else if(speakers == DSSPEAKER_QUAD)
rlm@0:                 device->FmtChans = DevFmtQuad;
rlm@0:             else if(speakers == DSSPEAKER_5POINT1)
rlm@0:                 device->FmtChans = DevFmtX51;
rlm@0:             else if(speakers == DSSPEAKER_7POINT1)
rlm@0:                 device->FmtChans = DevFmtX71;
rlm@0:             else
rlm@0:                 ERR("Unknown system speaker config: 0x%lx\n", speakers);
rlm@0:         }
rlm@0: 
rlm@0:         switch(device->FmtChans)
rlm@0:         {
rlm@0:             case DevFmtMono:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_CENTER;
rlm@0:                 break;
rlm@0:             case DevFmtStereo:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_LEFT |
rlm@0:                                            SPEAKER_FRONT_RIGHT;
rlm@0:                 break;
rlm@0:             case DevFmtQuad:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_LEFT |
rlm@0:                                            SPEAKER_FRONT_RIGHT |
rlm@0:                                            SPEAKER_BACK_LEFT |
rlm@0:                                            SPEAKER_BACK_RIGHT;
rlm@0:                 break;
rlm@0:             case DevFmtX51:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_LEFT |
rlm@0:                                            SPEAKER_FRONT_RIGHT |
rlm@0:                                            SPEAKER_FRONT_CENTER |
rlm@0:                                            SPEAKER_LOW_FREQUENCY |
rlm@0:                                            SPEAKER_BACK_LEFT |
rlm@0:                                            SPEAKER_BACK_RIGHT;
rlm@0:                 break;
rlm@0:             case DevFmtX51Side:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_LEFT |
rlm@0:                                            SPEAKER_FRONT_RIGHT |
rlm@0:                                            SPEAKER_FRONT_CENTER |
rlm@0:                                            SPEAKER_LOW_FREQUENCY |
rlm@0:                                            SPEAKER_SIDE_LEFT |
rlm@0:                                            SPEAKER_SIDE_RIGHT;
rlm@0:                 break;
rlm@0:             case DevFmtX61:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_LEFT |
rlm@0:                                            SPEAKER_FRONT_RIGHT |
rlm@0:                                            SPEAKER_FRONT_CENTER |
rlm@0:                                            SPEAKER_LOW_FREQUENCY |
rlm@0:                                            SPEAKER_BACK_CENTER |
rlm@0:                                            SPEAKER_SIDE_LEFT |
rlm@0:                                            SPEAKER_SIDE_RIGHT;
rlm@0:                 break;
rlm@0:             case DevFmtX71:
rlm@0:                 OutputType.dwChannelMask = SPEAKER_FRONT_LEFT |
rlm@0:                                            SPEAKER_FRONT_RIGHT |
rlm@0:                                            SPEAKER_FRONT_CENTER |
rlm@0:                                            SPEAKER_LOW_FREQUENCY |
rlm@0:                                            SPEAKER_BACK_LEFT |
rlm@0:                                            SPEAKER_BACK_RIGHT |
rlm@0:                                            SPEAKER_SIDE_LEFT |
rlm@0:                                            SPEAKER_SIDE_RIGHT;
rlm@0:                 break;
rlm@0:         }
rlm@0: 
rlm@0:         OutputType.Format.wFormatTag = WAVE_FORMAT_PCM;
rlm@0:         OutputType.Format.nChannels = ChannelsFromDevFmt(device->FmtChans);
rlm@0:         OutputType.Format.wBitsPerSample = BytesFromDevFmt(device->FmtType) * 8;
rlm@0:         OutputType.Format.nBlockAlign = OutputType.Format.nChannels*OutputType.Format.wBitsPerSample/8;
rlm@0:         OutputType.Format.nSamplesPerSec = device->Frequency;
rlm@0:         OutputType.Format.nAvgBytesPerSec = OutputType.Format.nSamplesPerSec*OutputType.Format.nBlockAlign;
rlm@0:         OutputType.Format.cbSize = 0;
rlm@0:     }
rlm@0: 
rlm@0:     if(OutputType.Format.nChannels > 2 || device->FmtType == DevFmtFloat)
rlm@0:     {
rlm@0:         OutputType.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
rlm@0:         OutputType.Samples.wValidBitsPerSample = OutputType.Format.wBitsPerSample;
rlm@0:         OutputType.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
rlm@0:         if(device->FmtType == DevFmtFloat)
rlm@0:             OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
rlm@0:         else
rlm@0:             OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
rlm@0:     }
rlm@0:     else
rlm@0:     {
rlm@0:         if(SUCCEEDED(hr))
rlm@0:         {
rlm@0:             memset(&DSBDescription,0,sizeof(DSBUFFERDESC));
rlm@0:             DSBDescription.dwSize=sizeof(DSBUFFERDESC);
rlm@0:             DSBDescription.dwFlags=DSBCAPS_PRIMARYBUFFER;
rlm@0:             hr = IDirectSound_CreateSoundBuffer(pData->lpDS, &DSBDescription, &pData->DSpbuffer, NULL);
rlm@0:         }
rlm@0:         if(SUCCEEDED(hr))
rlm@0:             hr = IDirectSoundBuffer_SetFormat(pData->DSpbuffer,&OutputType.Format);
rlm@0:     }
rlm@0: 
rlm@0:     if(SUCCEEDED(hr))
rlm@0:     {
rlm@0:         if(device->NumUpdates > MAX_UPDATES)
rlm@0:         {
rlm@0:             device->UpdateSize = (device->UpdateSize*device->NumUpdates +
rlm@0:                                   MAX_UPDATES-1) / MAX_UPDATES;
rlm@0:             device->NumUpdates = MAX_UPDATES;
rlm@0:         }
rlm@0: 
rlm@0:         memset(&DSBDescription,0,sizeof(DSBUFFERDESC));
rlm@0:         DSBDescription.dwSize=sizeof(DSBUFFERDESC);
rlm@0:         DSBDescription.dwFlags=DSBCAPS_CTRLPOSITIONNOTIFY|DSBCAPS_GETCURRENTPOSITION2|DSBCAPS_GLOBALFOCUS;
rlm@0:         DSBDescription.dwBufferBytes=device->UpdateSize * device->NumUpdates *
rlm@0:                                      OutputType.Format.nBlockAlign;
rlm@0:         DSBDescription.lpwfxFormat=&OutputType.Format;
rlm@0:         hr = IDirectSound_CreateSoundBuffer(pData->lpDS, &DSBDescription, &pData->DSsbuffer, NULL);
rlm@0:     }
rlm@0: 
rlm@0:     if(SUCCEEDED(hr))
rlm@0:     {
rlm@0:         hr = IDirectSoundBuffer_QueryInterface(pData->DSsbuffer, &IID_IDirectSoundNotify, (LPVOID *)&pData->DSnotify);
rlm@0:         if(SUCCEEDED(hr))
rlm@0:         {
rlm@0:             DSBPOSITIONNOTIFY notifies[MAX_UPDATES];
rlm@0:             ALuint i;
rlm@0: 
rlm@0:             for(i = 0;i < device->NumUpdates;++i)
rlm@0:             {
rlm@0:                 notifies[i].dwOffset = i * device->UpdateSize *
rlm@0:                                        OutputType.Format.nBlockAlign;
rlm@0:                 notifies[i].hEventNotify = pData->hNotifyEvent;
rlm@0:             }
rlm@0:             if(IDirectSoundNotify_SetNotificationPositions(pData->DSnotify, device->NumUpdates, notifies) != DS_OK)
rlm@0:                 hr = E_FAIL;
rlm@0:         }
rlm@0:     }
rlm@0: 
rlm@0:     if(SUCCEEDED(hr))
rlm@0:     {
rlm@0:         ResetEvent(pData->hNotifyEvent);
rlm@0:         SetDefaultWFXChannelOrder(device);
rlm@0:         pData->thread = StartThread(DSoundProc, device);
rlm@0:         if(pData->thread == NULL)
rlm@0:             hr = E_FAIL;
rlm@0:     }
rlm@0: 
rlm@0:     if(FAILED(hr))
rlm@0:     {
rlm@0:         if(pData->DSnotify != NULL)
rlm@0:             IDirectSoundNotify_Release(pData->DSnotify);
rlm@0:         pData->DSnotify = NULL;
rlm@0:         if(pData->DSsbuffer != NULL)
rlm@0:             IDirectSoundBuffer_Release(pData->DSsbuffer);
rlm@0:         pData->DSsbuffer = NULL;
rlm@0:         if(pData->DSpbuffer != NULL)
rlm@0:             IDirectSoundBuffer_Release(pData->DSpbuffer);
rlm@0:         pData->DSpbuffer = NULL;
rlm@0:         return ALC_FALSE;
rlm@0:     }
rlm@0: 
rlm@0:     return ALC_TRUE;
rlm@0: }
rlm@0: 
rlm@0: static void DSoundStopPlayback(ALCdevice *device)
rlm@0: {
rlm@0:     DSoundData *pData = device->ExtraData;
rlm@0: 
rlm@0:     if(!pData->thread)
rlm@0:         return;
rlm@0: 
rlm@0:     pData->killNow = 1;
rlm@0:     StopThread(pData->thread);
rlm@0:     pData->thread = NULL;
rlm@0: 
rlm@0:     pData->killNow = 0;
rlm@0: 
rlm@0:     IDirectSoundNotify_Release(pData->DSnotify);
rlm@0:     pData->DSnotify = NULL;
rlm@0:     IDirectSoundBuffer_Release(pData->DSsbuffer);
rlm@0:     pData->DSsbuffer = NULL;
rlm@0:     if(pData->DSpbuffer != NULL)
rlm@0:         IDirectSoundBuffer_Release(pData->DSpbuffer);
rlm@0:     pData->DSpbuffer = NULL;
rlm@0: }
rlm@0: 
rlm@0: 
rlm@0: static const BackendFuncs DSoundFuncs = {
rlm@0:     DSoundOpenPlayback,
rlm@0:     DSoundClosePlayback,
rlm@0:     DSoundResetPlayback,
rlm@0:     DSoundStopPlayback,
rlm@0:     NULL,
rlm@0:     NULL,
rlm@0:     NULL,
rlm@0:     NULL,
rlm@0:     NULL,
rlm@0:     NULL
rlm@0: };
rlm@0: 
rlm@0: 
rlm@0: ALCboolean alcDSoundInit(BackendFuncs *FuncList)
rlm@0: {
rlm@0:     if(!DSoundLoad())
rlm@0:         return ALC_FALSE;
rlm@0:     *FuncList = DSoundFuncs;
rlm@0:     return ALC_TRUE;
rlm@0: }
rlm@0: 
rlm@0: void alcDSoundDeinit(void)
rlm@0: {
rlm@0:     ALuint i;
rlm@0: 
rlm@0:     for(i = 0;i < NumDevices;++i)
rlm@0:         free(DeviceList[i].name);
rlm@0:     free(DeviceList);
rlm@0:     DeviceList = NULL;
rlm@0:     NumDevices = 0;
rlm@0: 
rlm@0:     if(ds_handle)
rlm@0:         FreeLibrary(ds_handle);
rlm@0:     ds_handle = NULL;
rlm@0: }
rlm@0: 
rlm@0: void alcDSoundProbe(enum DevProbe type)
rlm@0: {
rlm@0:     HRESULT hr;
rlm@0:     ALuint i;
rlm@0: 
rlm@0:     switch(type)
rlm@0:     {
rlm@0:         case DEVICE_PROBE:
rlm@0:             AppendDeviceList(dsDevice);
rlm@0:             break;
rlm@0: 
rlm@0:         case ALL_DEVICE_PROBE:
rlm@0:             for(i = 0;i < NumDevices;++i)
rlm@0:                 free(DeviceList[i].name);
rlm@0:             free(DeviceList);
rlm@0:             DeviceList = NULL;
rlm@0:             NumDevices = 0;
rlm@0: 
rlm@0:             hr = DirectSoundEnumerateA(DSoundEnumDevices, NULL);
rlm@0:             if(FAILED(hr))
rlm@0:                 ERR("Error enumerating DirectSound devices (%#x)!\n", (unsigned int)hr);
rlm@0:             else
rlm@0:             {
rlm@0:                 for(i = 0;i < NumDevices;i++)
rlm@0:                     AppendAllDeviceList(DeviceList[i].name);
rlm@0:             }
rlm@0:             break;
rlm@0: 
rlm@0:         case CAPTURE_DEVICE_PROBE:
rlm@0:             break;
rlm@0:     }
rlm@0: }