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add new method ms_filter_find_neighbours()

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git-svn-id: svn+ssh://svn.savannah.nongnu.org/linphone/trunk@475 3f6dc0c8-ddfe-455d-9043-3cd528dc4637
This commit is contained in:
smorlat 2009-05-18 16:06:28 +00:00
parent f00fe07efb
commit ada9d79bcb
4 changed files with 110 additions and 89 deletions
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8
linphone/mediastreamer2/include/mediastreamer2/msfilter.h
View file

@ -352,6 +352,14 @@ void ms_filter_set_notify_callback(MSFilter *f, MSFilterNotifyFunc fn, void *use
*/ */
MSFilterId ms_filter_get_id(MSFilter *f); MSFilterId ms_filter_get_id(MSFilter *f);
/**
* Obtain the list of current filter's neighbours, ie filters that are part of same graph.
*
* Returns: a MSList of MSFilter, that needs to be freed by the caller when no more needed.
**/
MSList * ms_filter_find_neighbours(MSFilter *me);
/** /**
* Destroy a filter object. * Destroy a filter object.
* *

41
linphone/mediastreamer2/src/msfilter.c
View file

@ -232,6 +232,47 @@ void ms_filter_notify_no_arg(MSFilter *f, unsigned int id){
f->notify(f->notify_ud,id,NULL); f->notify(f->notify_ud,id,NULL);
} }
static void find_filters(MSList **filters, MSFilter *f ){
int i,found;
MSQueue *link;
if (f==NULL) ms_fatal("Bad graph.");
/*ms_message("seeing %s, seen=%i",f->desc->name,f->seen);*/
if (f->seen){
return;
}
f->seen=TRUE;
*filters=ms_list_append(*filters,f);
/* go upstream */
for(i=0;i<f->desc->ninputs;i++){
link=f->inputs[i];
if (link!=NULL) find_filters(filters,link->prev.filter);
}
/* go downstream */
for(i=0,found=0;i<f->desc->noutputs;i++){
link=f->outputs[i];
if (link!=NULL) {
found++;
find_filters(filters,link->next.filter);
}
}
if (f->desc->noutputs>=1 && found==0){
ms_fatal("Bad graph: filter %s has %i outputs, none is connected.",f->desc->name,f->desc->noutputs);
}
}
MSList * ms_filter_find_neighbours(MSFilter *me){
MSList *l=NULL;
MSList *it;
find_filters(&l,me);
/*reset seen boolean for further lookups to succeed !*/
for(it=l;it!=NULL;it=it->next){
MSFilter *f=(MSFilter*)it->data;
f->seen=FALSE;
}
return l;
}
void ms_connection_helper_start(MSConnectionHelper *h){ void ms_connection_helper_start(MSConnectionHelper *h){
h->last.filter=0; h->last.filter=0;
h->last.pin=-1; h->last.pin=-1;

31
linphone/mediastreamer2/src/msticker.c
View file

@ -79,33 +79,6 @@ void ms_ticker_destroy(MSTicker *ticker){
ms_free(ticker); ms_free(ticker);
} }
void find_filters(MSList **filters, MSFilter *f ){
int i,found;
MSQueue *link;
if (f==NULL) ms_fatal("Bad graph.");
/*ms_message("seeing %s, seen=%i",f->desc->name,f->seen);*/
if (f->seen){
return;
}
f->seen=TRUE;
*filters=ms_list_append(*filters,f);
/* go upstream */
for(i=0;i<f->desc->ninputs;i++){
link=f->inputs[i];
if (link!=NULL) find_filters(filters,link->prev.filter);
}
/* go downstream */
for(i=0,found=0;i<f->desc->noutputs;i++){
link=f->outputs[i];
if (link!=NULL) {
found++;
find_filters(filters,link->next.filter);
}
}
if (f->desc->noutputs>=1 && found==0){
ms_fatal("Bad graph: filter %s has %i outputs, none is connected.",f->desc->name,f->desc->noutputs);
}
}
static MSList *get_sources(MSList *filters){ static MSList *get_sources(MSList *filters){
MSList *sources=NULL; MSList *sources=NULL;
@ -130,7 +103,7 @@ int ms_ticker_attach(MSTicker *ticker,MSFilter *f)
return 0; return 0;
} }
find_filters(&filters,f); filters=ms_filter_find_neighbours(f);
sources=get_sources(filters); sources=get_sources(filters);
if (sources==NULL){ if (sources==NULL){
ms_fatal("No sources found around filter %s",f->desc->name); ms_fatal("No sources found around filter %s",f->desc->name);
@ -161,7 +134,7 @@ int ms_ticker_detach(MSTicker *ticker,MSFilter *f){
ms_mutex_lock(&ticker->lock); ms_mutex_lock(&ticker->lock);
find_filters(&filters,f); filters=ms_filter_find_neighbours(f);
sources=get_sources(filters); sources=get_sources(filters);
if (sources==NULL){ if (sources==NULL){
ms_fatal("No sources found around filter %s",f->desc->name); ms_fatal("No sources found around filter %s",f->desc->name);

119
linphone/mediastreamer2/src/winsndds.cpp
View file

@ -23,8 +23,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "mediastreamer2/msfilter.h" #include "mediastreamer2/msfilter.h"
#include "mediastreamer2/msticker.h" #include "mediastreamer2/msticker.h"
extern void find_filters(MSList **filters, MSFilter *f );
#define UNICODE #define UNICODE
#include <mmsystem.h> #include <mmsystem.h>
@ -52,9 +50,9 @@ static HRESULT (WINAPI *ms_DirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
static HRESULT (WINAPI *ms_DirectSoundCaptureCreate)(LPGUID, LPDIRECTSOUNDCAPTURE *, LPUNKNOWN); static HRESULT (WINAPI *ms_DirectSoundCaptureCreate)(LPGUID, LPDIRECTSOUNDCAPTURE *, LPUNKNOWN);
static HRESULT (WINAPI *ms_DirectSoundCaptureEnumerate)(LPDSENUMCALLBACKW, LPVOID); static HRESULT (WINAPI *ms_DirectSoundCaptureEnumerate)(LPDSENUMCALLBACKW, LPVOID);
static HRESULT (WINAPI *ms_DirectSoundFullDuplexCreate)(LPCGUID , LPCGUID , static HRESULT (WINAPI *ms_DirectSoundFullDuplexCreate)(LPCGUID , LPCGUID ,
LPCDSCBUFFERDESC , LPCDSBUFFERDESC , HWND , LPCDSCBUFFERDESC , LPCDSBUFFERDESC , HWND ,
DWORD , LPDIRECTSOUNDFULLDUPLEX* , LPDIRECTSOUNDCAPTUREBUFFER8 *, DWORD , LPDIRECTSOUNDFULLDUPLEX* , LPDIRECTSOUNDCAPTUREBUFFER8 *,
LPDIRECTSOUNDBUFFER8 *, LPUNKNOWN ); LPDIRECTSOUNDBUFFER8 *, LPUNKNOWN );
typedef struct WinSndDsCard{ typedef struct WinSndDsCard{
@ -104,12 +102,12 @@ static void winsnddscard_set_level(MSSndCard *card, MSSndCardMixerElem e, int pe
slDirectSoundOutputBuffer=NULL; slDirectSoundOutputBuffer=NULL;
return ; return ;
} }
if ((hr = IDirectSoundBuffer_SetVolume(slDirectSoundOutputBuffer, -dWvolume)) != DS_OK) if ((hr = IDirectSoundBuffer_SetVolume(slDirectSoundOutputBuffer, -dWvolume)) != DS_OK)
{ {
ms_warning("winsnddscard_set_level: No playback volume control."); ms_warning("winsnddscard_set_level: No playback volume control.");
} }
IDirectSoundBuffer_Release( slDirectSoundOutputBuffer ); IDirectSoundBuffer_Release( slDirectSoundOutputBuffer );
slDirectSoundOutputBuffer=NULL; slDirectSoundOutputBuffer=NULL;
IDirectSound_Release( slDirectSound ); IDirectSound_Release( slDirectSound );
@ -138,8 +136,8 @@ static void winsnddscard_set_level(MSSndCard *card, MSSndCardMixerElem e, int pe
//if ((hr = IDirectSoundCaptureBuffer_SetVolume(slDirectSoundInputBuffer, -dWvolume)) != DS_OK) //if ((hr = IDirectSoundCaptureBuffer_SetVolume(slDirectSoundInputBuffer, -dWvolume)) != DS_OK)
{ {
ms_warning("winsnddscard_set_level: No mic volume control."); ms_warning("winsnddscard_set_level: No mic volume control.");
} }
IDirectSoundCaptureBuffer_Release( slDirectSoundInputBuffer ); IDirectSoundCaptureBuffer_Release( slDirectSoundInputBuffer );
slDirectSoundInputBuffer=NULL; slDirectSoundInputBuffer=NULL;
IDirectSoundCapture_Release( slDirectSoundCapture ); IDirectSoundCapture_Release( slDirectSoundCapture );
@ -151,7 +149,7 @@ static void winsnddscard_set_level(MSSndCard *card, MSSndCardMixerElem e, int pe
} }
static int winsnddscard_get_level(MSSndCard *card, MSSndCardMixerElem e){ static int winsnddscard_get_level(MSSndCard *card, MSSndCardMixerElem e){
WinSndDsCard *d=(WinSndDsCard*)card->data; WinSndDsCard *d=(WinSndDsCard*)card->data;
LONG dWvolume = 10000; LONG dWvolume = 10000;
DSBUFFERDESC primaryDesc; DSBUFFERDESC primaryDesc;
DSCBUFFERDESC captureDesc; DSCBUFFERDESC captureDesc;
@ -191,14 +189,14 @@ static int winsnddscard_get_level(MSSndCard *card, MSSndCardMixerElem e){
if ((hr = IDirectSoundBuffer_GetVolume(slDirectSoundOutputBuffer, &dWvolume)) != DS_OK) if ((hr = IDirectSoundBuffer_GetVolume(slDirectSoundOutputBuffer, &dWvolume)) != DS_OK)
{ {
ms_warning("winsnddscard_get_level: No playback volume control."); ms_warning("winsnddscard_get_level: No playback volume control.");
} }
IDirectSoundBuffer_Release( slDirectSoundOutputBuffer ); IDirectSoundBuffer_Release( slDirectSoundOutputBuffer );
slDirectSoundOutputBuffer=NULL; slDirectSoundOutputBuffer=NULL;
IDirectSound_Release( slDirectSound ); IDirectSound_Release( slDirectSound );
slDirectSound=NULL; slDirectSound=NULL;
return 100-dWvolume *100/(-DSBVOLUME_MIN); return 100-dWvolume *100/(-DSBVOLUME_MIN);
case MS_SND_CARD_MASTER: case MS_SND_CARD_MASTER:
ms_warning("winsnddscard_get_level: No master volume control."); ms_warning("winsnddscard_get_level: No master volume control.");
break; break;
@ -222,13 +220,13 @@ static int winsnddscard_get_level(MSSndCard *card, MSSndCardMixerElem e){
//if ((hr = IDirectSoundCaptureBuffer_GetVolume(slDirectSoundInputBuffer, &dWvolume)) != DS_OK) //if ((hr = IDirectSoundCaptureBuffer_GetVolume(slDirectSoundInputBuffer, &dWvolume)) != DS_OK)
{ {
ms_error("winsnddscard_get_level: No mic volume control."); ms_error("winsnddscard_get_level: No mic volume control.");
} }
IDirectSoundCaptureBuffer_Release( slDirectSoundInputBuffer ); IDirectSoundCaptureBuffer_Release( slDirectSoundInputBuffer );
slDirectSoundInputBuffer=NULL; slDirectSoundInputBuffer=NULL;
IDirectSoundCapture_Release( slDirectSoundCapture ); IDirectSoundCapture_Release( slDirectSoundCapture );
slDirectSoundCapture=NULL; slDirectSoundCapture=NULL;
return 100-dWvolume *100/(-DSBVOLUME_MIN); return 100-dWvolume *100/(-DSBVOLUME_MIN);
default: default:
ms_warning("winsnddscard_get_level: unsupported command."); ms_warning("winsnddscard_get_level: unsupported command.");
return -1; return -1;
@ -355,8 +353,8 @@ static BOOL CALLBACK enumerate_capture_devices_callback(LPGUID lpGUID,
char szName[256]; char szName[256];
wchar_t snd_card_name[256]; wchar_t snd_card_name[256];
swprintf(snd_card_name, 256, L"DS: %s", lpszDesc); swprintf(snd_card_name, 256, L"DS: %s", lpszDesc);
WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0); WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0);
add_or_update_card(m,szName,lpGUID,dev_index,-1,MS_SND_CARD_CAP_CAPTURE); add_or_update_card(m,szName,lpGUID,dev_index,-1,MS_SND_CARD_CAP_CAPTURE);
dev_index++; dev_index++;
} }
@ -365,8 +363,8 @@ static BOOL CALLBACK enumerate_capture_devices_callback(LPGUID lpGUID,
char szName[256]; char szName[256];
wchar_t snd_card_name[256]; wchar_t snd_card_name[256];
swprintf(snd_card_name, 256, L"DS: %s", lpszDesc); swprintf(snd_card_name, 256, L"DS: %s", lpszDesc);
WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0); WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0);
add_or_update_card(m,szName,lpGUID,dev_index,-1,MS_SND_CARD_CAP_CAPTURE); add_or_update_card(m,szName,lpGUID,dev_index,-1,MS_SND_CARD_CAP_CAPTURE);
dev_index++; dev_index++;
} }
@ -387,7 +385,7 @@ static BOOL CALLBACK enumerate_playback_devices_callback(LPGUID lpGUID,
char szName[256]; char szName[256];
wchar_t snd_card_name[256]; wchar_t snd_card_name[256];
swprintf(snd_card_name, 256, L"DS: %s", lpszDesc); swprintf(snd_card_name, 256, L"DS: %s", lpszDesc);
WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0); WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0);
add_or_update_card(m,szName,lpGUID,-1,dev_index,MS_SND_CARD_CAP_PLAYBACK); add_or_update_card(m,szName,lpGUID,-1,dev_index,MS_SND_CARD_CAP_PLAYBACK);
dev_index++; dev_index++;
@ -397,7 +395,7 @@ static BOOL CALLBACK enumerate_playback_devices_callback(LPGUID lpGUID,
char szName[256]; char szName[256];
wchar_t snd_card_name[256]; wchar_t snd_card_name[256];
swprintf(snd_card_name, 256, L"DS: %s", lpszDesc); swprintf(snd_card_name, 256, L"DS: %s", lpszDesc);
WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0); WideCharToMultiByte(CP_UTF8,0,snd_card_name,-1,szName,256,0,0);
add_or_update_card(m,szName,lpGUID,-1,dev_index,MS_SND_CARD_CAP_PLAYBACK); add_or_update_card(m,szName,lpGUID,-1,dev_index,MS_SND_CARD_CAP_PLAYBACK);
dev_index++; dev_index++;
@ -434,9 +432,9 @@ static void winsnddscard_detect(MSSndCardManager *m){
ms_DirectSoundCaptureEnumerate =(HRESULT (WINAPI *)(LPDSENUMCALLBACKW, LPVOID)) ms_DirectSoundCaptureEnumerate =(HRESULT (WINAPI *)(LPDSENUMCALLBACKW, LPVOID))
GetProcAddress( ms_lib_instance, "DirectSoundCaptureEnumerateW" ); GetProcAddress( ms_lib_instance, "DirectSoundCaptureEnumerateW" );
ms_DirectSoundFullDuplexCreate =(HRESULT (WINAPI *)(LPCGUID , LPCGUID , ms_DirectSoundFullDuplexCreate =(HRESULT (WINAPI *)(LPCGUID , LPCGUID ,
LPCDSCBUFFERDESC , LPCDSBUFFERDESC , HWND , LPCDSCBUFFERDESC , LPCDSBUFFERDESC , HWND ,
DWORD , LPDIRECTSOUNDFULLDUPLEX* , LPDIRECTSOUNDCAPTUREBUFFER8 *, DWORD , LPDIRECTSOUNDFULLDUPLEX* , LPDIRECTSOUNDCAPTUREBUFFER8 *,
LPDIRECTSOUNDBUFFER8 *, LPUNKNOWN)) LPDIRECTSOUNDBUFFER8 *, LPUNKNOWN))
GetProcAddress( ms_lib_instance, "DirectSoundFullDuplexCreate" ); GetProcAddress( ms_lib_instance, "DirectSoundFullDuplexCreate" );
@ -723,7 +721,7 @@ static void winsndds_write_preprocess(MSFilter *f){
MSFilter *f_capture_filter=NULL; MSFilter *f_capture_filter=NULL;
WinSndDs *d_capture_filter=NULL; WinSndDs *d_capture_filter=NULL;
find_filters(&filters, f); filters=ms_filter_find_neighbours(f);
if (filters!=NULL) if (filters!=NULL)
{ {
MSList *it; MSList *it;
@ -739,6 +737,7 @@ static void winsndds_write_preprocess(MSFilter *f){
d_capture_filter=(WinSndDs*)f_capture_filter->data; d_capture_filter=(WinSndDs*)f_capture_filter->data;
} }
} }
ms_list_free(filters);
} }
d->stat_input=0; d->stat_input=0;
@ -756,14 +755,14 @@ static void winsndds_write_preprocess(MSFilter *f){
winsndds_read_postprocess(f_capture_filter); winsndds_read_postprocess(f_capture_filter);
DSCEFFECTDESC dscfx[1]; DSCEFFECTDESC dscfx[1];
ZeroMemory( &dscfx[0], sizeof( DSCEFFECTDESC ) ); ZeroMemory( &dscfx[0], sizeof( DSCEFFECTDESC ) );
dscfx[0].dwSize = sizeof( DSCEFFECTDESC ); dscfx[0].dwSize = sizeof( DSCEFFECTDESC );
dscfx[0].dwFlags = DSCFX_LOCSOFTWARE ; dscfx[0].dwFlags = DSCFX_LOCSOFTWARE ;
dscfx[0].guidDSCFXClass = GUID_DSCFX_CLASS_AEC; dscfx[0].guidDSCFXClass = GUID_DSCFX_CLASS_AEC;
dscfx[0].guidDSCFXInstance = GUID_DSCFX_MS_AEC; dscfx[0].guidDSCFXInstance = GUID_DSCFX_MS_AEC;
dscfx[0].dwReserved1 = 0; dscfx[0].dwReserved1 = 0;
dscfx[0].dwReserved2 = 0; dscfx[0].dwReserved2 = 0;
d_capture_filter->framesPerDSBuffer = d_capture_filter->wfx.nAvgBytesPerSec/4; d_capture_filter->framesPerDSBuffer = d_capture_filter->wfx.nAvgBytesPerSec/4;
winsndds_apply_settings(d_capture_filter); winsndds_apply_settings(d_capture_filter);
@ -773,7 +772,7 @@ static void winsndds_write_preprocess(MSFilter *f){
captureDesc.dwFlags = DSCBCAPS_CTRLFX; captureDesc.dwFlags = DSCBCAPS_CTRLFX;
captureDesc.dwBufferBytes = d_capture_filter->framesPerDSBuffer; captureDesc.dwBufferBytes = d_capture_filter->framesPerDSBuffer;
captureDesc.lpwfxFormat = &d_capture_filter->wfx; captureDesc.lpwfxFormat = &d_capture_filter->wfx;
captureDesc.dwFXCount = 1; captureDesc.dwFXCount = 1;
captureDesc.lpDSCFXDesc = dscfx; captureDesc.lpDSCFXDesc = dscfx;
ZeroMemory(&secondaryDesc, sizeof(DSBUFFERDESC)); ZeroMemory(&secondaryDesc, sizeof(DSBUFFERDESC));
@ -784,33 +783,33 @@ static void winsndds_write_preprocess(MSFilter *f){
secondaryDesc.lpwfxFormat = &d->wfx; secondaryDesc.lpwfxFormat = &d->wfx;
hWnd = GetDesktopWindow(); hWnd = GetDesktopWindow();
hr = ms_DirectSoundFullDuplexCreate(&d_capture_filter->in_guid, hr = ms_DirectSoundFullDuplexCreate(&d_capture_filter->in_guid,
&d->out_guid, &d->out_guid,
&captureDesc, &captureDesc,
&secondaryDesc, &secondaryDesc,
hWnd, hWnd,
DSSCL_NORMAL, DSSCL_NORMAL,
&d->lpDirectSoundFullDuplex, &d->lpDirectSoundFullDuplex,
(LPDIRECTSOUNDCAPTUREBUFFER8*)&d_capture_filter->lpDirectSoundInputBuffer, (LPDIRECTSOUNDCAPTUREBUFFER8*)&d_capture_filter->lpDirectSoundInputBuffer,
(LPDIRECTSOUNDBUFFER8*)&d->lpDirectSoundOutputBuffer, (LPDIRECTSOUNDBUFFER8*)&d->lpDirectSoundOutputBuffer,
NULL); NULL);
if (hr!=DS_OK) if (hr!=DS_OK)
{ {
ms_message("full duplex and echo canceller: disabled!"); ms_message("full duplex and echo canceller: disabled!");
captureDesc.dwFlags = 0; captureDesc.dwFlags = 0;
captureDesc.dwFXCount = 0; captureDesc.dwFXCount = 0;
captureDesc.lpDSCFXDesc = NULL; captureDesc.lpDSCFXDesc = NULL;
hr = ms_DirectSoundFullDuplexCreate(&d_capture_filter->in_guid, hr = ms_DirectSoundFullDuplexCreate(&d_capture_filter->in_guid,
&d->out_guid, &d->out_guid,
&captureDesc, &captureDesc,
&secondaryDesc, &secondaryDesc,
hWnd, hWnd,
DSSCL_NORMAL, DSSCL_NORMAL,
&d->lpDirectSoundFullDuplex, &d->lpDirectSoundFullDuplex,
(LPDIRECTSOUNDCAPTUREBUFFER8*)&d_capture_filter->lpDirectSoundInputBuffer, (LPDIRECTSOUNDCAPTUREBUFFER8*)&d_capture_filter->lpDirectSoundInputBuffer,
(LPDIRECTSOUNDBUFFER8*)&d->lpDirectSoundOutputBuffer, (LPDIRECTSOUNDBUFFER8*)&d->lpDirectSoundOutputBuffer,
NULL); NULL);
} }
if (hr!=DS_OK) if (hr!=DS_OK)
@ -940,7 +939,7 @@ static void winsndds_write_postprocess(MSFilter *f){
static void winsndds_write_process(MSFilter *f){ static void winsndds_write_process(MSFilter *f){
WinSndDs *d=(WinSndDs*)f->data; WinSndDs *d=(WinSndDs*)f->data;
int discarded=0; int discarded=0;
DWORD dwStatus; DWORD dwStatus;
HRESULT hr; HRESULT hr;
if (d->lpDirectSoundOutputBuffer==NULL) { if (d->lpDirectSoundOutputBuffer==NULL) {
@ -980,10 +979,10 @@ static void winsndds_write_process(MSFilter *f){
//ms_message("DS information: last_writeOffset=%i current_playOffset=%i current_writeOffset=%i max_writable=%i", //ms_message("DS information: last_writeOffset=%i current_playOffset=%i current_writeOffset=%i max_writable=%i",
// d->writeOffset, current_playOffset, currentWriteOffset, msize_max); // d->writeOffset, current_playOffset, currentWriteOffset, msize_max);
hr = IDirectSoundBuffer_GetStatus (d->lpDirectSoundOutputBuffer, &dwStatus); hr = IDirectSoundBuffer_GetStatus (d->lpDirectSoundOutputBuffer, &dwStatus);
if (dwStatus & DSBSTATUS_BUFFERLOST) { if (dwStatus & DSBSTATUS_BUFFERLOST) {
hr = IDirectSoundBuffer_Restore (d->lpDirectSoundOutputBuffer); hr = IDirectSoundBuffer_Restore (d->lpDirectSoundOutputBuffer);
d->writeOffset = 0; d->writeOffset = 0;
ms_message("DSBSTATUS_BUFFERLOST: restoring buffer"); ms_message("DSBSTATUS_BUFFERLOST: restoring buffer");
} }