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Sweden-Number/dlls/dsound/primary.c

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/* DirectSound
*
* Copyright 1998 Marcus Meissner
* Copyright 1998 Rob Riggs
* Copyright 2000-2002 TransGaming Technologies, Inc.
*
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA
*
* TODO:
* When PrimarySetFormat (via ReopenDevice or PrimaryOpen) fails,
* it leaves dsound in unusable (not really open) state.
*/
#include <stdarg.h>
#define COBJMACROS
#define NONAMELESSSTRUCT
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "mmsystem.h"
#include "winternl.h"
#include "mmddk.h"
#include "wine/debug.h"
#include "dsound.h"
#include "dsound_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(dsound);
/** Calculate how long a fragment length of about 10 ms should be in frames
*
* nSamplesPerSec: Frequency rate in samples per second
* nBlockAlign: Size of a single blockalign
*
* Returns:
* Size in bytes of a single fragment
*/
DWORD DSOUND_fraglen(DWORD nSamplesPerSec, DWORD nBlockAlign)
{
/* Given a timer delay of 10ms, the fragment size is approximately:
* fraglen = (nSamplesPerSec * 10 / 1000) * nBlockAlign
* ==> fraglen = (nSamplesPerSec / 100) * nBlockSize
*
* ALSA uses buffers that are powers of 2. Because of this, fraglen
* is rounded up to the nearest power of 2:
*/
if (nSamplesPerSec <= 12800)
return 128 * nBlockAlign;
if (nSamplesPerSec <= 25600)
return 256 * nBlockAlign;
if (nSamplesPerSec <= 51200)
return 512 * nBlockAlign;
return 1024 * nBlockAlign;
}
static void DSOUND_RecalcPrimary(DirectSoundDevice *device)
{
TRACE("(%p)\n", device);
device->fraglen = DSOUND_fraglen(device->pwfx->nSamplesPerSec, device->pwfx->nBlockAlign);
device->helfrags = device->buflen / device->fraglen;
TRACE("fraglen=%d helfrags=%d\n", device->fraglen, device->helfrags);
/* calculate the 10ms write lead */
device->writelead = (device->pwfx->nSamplesPerSec / 100) * device->pwfx->nBlockAlign;
}
HRESULT DSOUND_ReopenDevice(DirectSoundDevice *device, BOOL forcewave)
{
UINT prebuf_frames;
REFERENCE_TIME prebuf_rt;
HRESULT hres;
TRACE("(%p, %d)\n", device, forcewave);
if(device->client){
IAudioClient_Release(device->client);
device->client = NULL;
}
if(device->render){
IAudioRenderClient_Release(device->render);
device->render = NULL;
}
if(device->clock){
IAudioClock_Release(device->clock);
device->clock = NULL;
}
if(device->volume){
IAudioStreamVolume_Release(device->volume);
device->volume = NULL;
}
hres = IMMDevice_Activate(device->mmdevice, &IID_IAudioClient,
CLSCTX_INPROC_SERVER, NULL, (void **)&device->client);
if(FAILED(hres)){
WARN("Activate failed: %08x\n", hres);
return hres;
}
prebuf_frames = device->prebuf * DSOUND_fraglen(device->pwfx->nSamplesPerSec, device->pwfx->nBlockAlign) / device->pwfx->nBlockAlign;
prebuf_rt = (10000000 * (UINT64)prebuf_frames) / device->pwfx->nSamplesPerSec;
hres = IAudioClient_Initialize(device->client,
AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_NOPERSIST,
prebuf_rt, 0, device->pwfx, NULL);
if(FAILED(hres)){
IAudioClient_Release(device->client);
device->client = NULL;
WARN("Initialize failed: %08x\n", hres);
return hres;
}
hres = IAudioClient_GetService(device->client, &IID_IAudioRenderClient,
(void**)&device->render);
if(FAILED(hres)){
IAudioClient_Release(device->client);
device->client = NULL;
WARN("GetService failed: %08x\n", hres);
return hres;
}
hres = IAudioClient_GetService(device->client, &IID_IAudioClock,
(void**)&device->clock);
if(FAILED(hres)){
IAudioClient_Release(device->client);
IAudioRenderClient_Release(device->render);
device->client = NULL;
device->render = NULL;
WARN("GetService failed: %08x\n", hres);
return hres;
}
hres = IAudioClient_GetService(device->client, &IID_IAudioStreamVolume,
(void**)&device->volume);
if(FAILED(hres)){
IAudioClient_Release(device->client);
IAudioRenderClient_Release(device->render);
IAudioClock_Release(device->clock);
device->client = NULL;
device->render = NULL;
device->clock = NULL;
WARN("GetService failed: %08x\n", hres);
return hres;
}
return S_OK;
}
static HRESULT DSOUND_PrimaryOpen(DirectSoundDevice *device)
{
DWORD buflen;
LPBYTE newbuf;
TRACE("(%p)\n", device);
/* on original windows, the buffer it set to a fixed size, no matter what the settings are.
on windows this size is always fixed (tested on win-xp) */
if (!device->buflen)
device->buflen = ds_hel_buflen;
buflen = device->buflen;
buflen -= buflen % device->pwfx->nBlockAlign;
device->buflen = buflen;
device->mix_buffer_len = DSOUND_bufpos_to_mixpos(device, device->buflen);
device->mix_buffer = HeapAlloc(GetProcessHeap(), 0, device->mix_buffer_len);
if (!device->mix_buffer)
return DSERR_OUTOFMEMORY;
if (device->state == STATE_PLAYING) device->state = STATE_STARTING;
else if (device->state == STATE_STOPPING) device->state = STATE_STOPPED;
TRACE("desired buflen=%d, old buffer=%p\n", buflen, device->buffer);
/* reallocate emulated primary buffer */
if (device->buffer)
newbuf = HeapReAlloc(GetProcessHeap(),0,device->buffer, buflen);
else
newbuf = HeapAlloc(GetProcessHeap(),0, buflen);
if (!newbuf) {
ERR("failed to allocate primary buffer\n");
return DSERR_OUTOFMEMORY;
/* but the old buffer might still exist and must be re-prepared */
}
DSOUND_RecalcPrimary(device);
device->buffer = newbuf;
TRACE("fraglen=%d\n", device->fraglen);
device->mixfunction = mixfunctions[device->pwfx->wBitsPerSample/8 - 1];
device->normfunction = normfunctions[device->pwfx->wBitsPerSample/8 - 1];
FillMemory(device->buffer, device->buflen, (device->pwfx->wBitsPerSample == 8) ? 128 : 0);
FillMemory(device->mix_buffer, device->mix_buffer_len, 0);
device->last_pos_bytes = device->pwplay = device->pwqueue = device->playpos = device->mixpos = 0;
return DS_OK;
}
static void DSOUND_PrimaryClose(DirectSoundDevice *device)
{
HRESULT hr;
TRACE("(%p)\n", device);
device->pwqueue = (DWORD)-1; /* resetting queues */
if(device->client){
hr = IAudioClient_Stop(device->client);
if(FAILED(hr))
WARN("Stop failed: %08x\n", hr);
}
/* clear the queue */
device->pwqueue = 0;
}
HRESULT DSOUND_PrimaryCreate(DirectSoundDevice *device)
{
HRESULT err = DS_OK;
TRACE("(%p)\n", device);
device->buflen = ds_hel_buflen;
err = DSOUND_PrimaryOpen(device);
if (err != DS_OK) {
WARN("DSOUND_PrimaryOpen failed\n");
return err;
}
device->state = STATE_STOPPED;
return DS_OK;
}
HRESULT DSOUND_PrimaryDestroy(DirectSoundDevice *device)
{
TRACE("(%p)\n", device);
/* **** */
EnterCriticalSection(&(device->mixlock));
DSOUND_PrimaryClose(device);
HeapFree(GetProcessHeap(),0,device->pwfx);
device->pwfx=NULL;
LeaveCriticalSection(&(device->mixlock));
/* **** */
return DS_OK;
}
HRESULT DSOUND_PrimaryPlay(DirectSoundDevice *device)
{
HRESULT hr;
TRACE("(%p)\n", device);
hr = IAudioClient_Start(device->client);
if(FAILED(hr)){
WARN("Start failed: %08x\n", hr);
return hr;
}
return DS_OK;
}
HRESULT DSOUND_PrimaryStop(DirectSoundDevice *device)
{
HRESULT hr;
TRACE("(%p)\n", device);
hr = IAudioClient_Stop(device->client);
if(FAILED(hr)){
WARN("Stop failed: %08x\n", hr);
return hr;
}
return DS_OK;
}
HRESULT DSOUND_PrimaryGetPosition(DirectSoundDevice *device, LPDWORD playpos, LPDWORD writepos)
{
TRACE("(%p,%p,%p)\n", device, playpos, writepos);
TRACE("pwplay=%i, pwqueue=%i\n", device->pwplay, device->pwqueue);
/* check if playpos was requested */
if (playpos)
/* use the cached play position */
*playpos = device->pwplay * device->fraglen;
/* check if writepos was requested */
if (writepos)
/* the writepos is the first non-queued position */
*writepos = ((device->pwplay + device->pwqueue) % device->helfrags) * device->fraglen;
TRACE("playpos = %d, writepos = %d (%p, time=%d)\n", playpos?*playpos:-1, writepos?*writepos:-1, device, GetTickCount());
return DS_OK;
}
static DWORD DSOUND_GetFormatSize(LPCWAVEFORMATEX wfex)
{
if (wfex->wFormatTag == WAVE_FORMAT_PCM)
return sizeof(WAVEFORMATEX);
else
return sizeof(WAVEFORMATEX) + wfex->cbSize;
}
LPWAVEFORMATEX DSOUND_CopyFormat(LPCWAVEFORMATEX wfex)
{
DWORD size = DSOUND_GetFormatSize(wfex);
LPWAVEFORMATEX pwfx = HeapAlloc(GetProcessHeap(),0,size);
if (pwfx == NULL) {
WARN("out of memory\n");
} else if (wfex->wFormatTag != WAVE_FORMAT_PCM) {
CopyMemory(pwfx, wfex, size);
} else {
CopyMemory(pwfx, wfex, sizeof(PCMWAVEFORMAT));
pwfx->cbSize=0;
if (pwfx->nBlockAlign != pwfx->nChannels * pwfx->wBitsPerSample/8) {
WARN("Fixing bad nBlockAlign (%u)\n", pwfx->nBlockAlign);
pwfx->nBlockAlign = pwfx->nChannels * pwfx->wBitsPerSample/8;
}
if (pwfx->nAvgBytesPerSec != pwfx->nSamplesPerSec * pwfx->nBlockAlign) {
WARN("Fixing bad nAvgBytesPerSec (%u)\n", pwfx->nAvgBytesPerSec);
pwfx->nAvgBytesPerSec = pwfx->nSamplesPerSec * pwfx->nBlockAlign;
}
}
return pwfx;
}
HRESULT primarybuffer_SetFormat(DirectSoundDevice *device, LPCWAVEFORMATEX passed_fmt)
{
HRESULT err = DSERR_BUFFERLOST;
int i;
WAVEFORMATEX *old_fmt;
WAVEFORMATEXTENSIBLE *fmtex, *passed_fmtex = (WAVEFORMATEXTENSIBLE*)passed_fmt;
BOOL forced = (device->priolevel == DSSCL_WRITEPRIMARY);
TRACE("(%p,%p)\n", device, passed_fmt);
if (device->priolevel == DSSCL_NORMAL) {
WARN("failed priority check!\n");
return DSERR_PRIOLEVELNEEDED;
}
/* Let's be pedantic! */
if (passed_fmt == NULL) {
WARN("invalid parameter: passed_fmt==NULL!\n");
return DSERR_INVALIDPARAM;
}
TRACE("(formattag=0x%04x,chans=%d,samplerate=%d,"
"bytespersec=%d,blockalign=%d,bitspersamp=%d,cbSize=%d)\n",
passed_fmt->wFormatTag, passed_fmt->nChannels, passed_fmt->nSamplesPerSec,
passed_fmt->nAvgBytesPerSec, passed_fmt->nBlockAlign,
passed_fmt->wBitsPerSample, passed_fmt->cbSize);
if(passed_fmt->wBitsPerSample < 8 || passed_fmt->wBitsPerSample % 8 != 0 ||
passed_fmt->nChannels == 0 || passed_fmt->nSamplesPerSec == 0 ||
passed_fmt->nAvgBytesPerSec == 0 ||
passed_fmt->nBlockAlign != passed_fmt->nChannels * passed_fmt->wBitsPerSample / 8)
return DSERR_INVALIDPARAM;
if(passed_fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE){
if(passed_fmtex->Samples.wValidBitsPerSample > passed_fmtex->Format.wBitsPerSample)
return DSERR_INVALIDPARAM;
}
/* **** */
RtlAcquireResourceExclusive(&(device->buffer_list_lock), TRUE);
EnterCriticalSection(&(device->mixlock));
old_fmt = device->pwfx;
device->pwfx = DSOUND_CopyFormat(passed_fmt);
fmtex = (WAVEFORMATEXTENSIBLE *)device->pwfx;
if (device->pwfx == NULL) {
device->pwfx = old_fmt;
old_fmt = NULL;
err = DSERR_OUTOFMEMORY;
goto done;
}
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE){
if(fmtex->Samples.wValidBitsPerSample == 0){
TRACE("Correcting 0 valid bits per sample\n");
fmtex->Samples.wValidBitsPerSample = fmtex->Format.wBitsPerSample;
}
}
DSOUND_PrimaryClose(device);
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
/* requested format failed, so try others */
if(device->pwfx->wFormatTag == WAVE_FORMAT_IEEE_FLOAT){
device->pwfx->wFormatTag = WAVE_FORMAT_PCM;
device->pwfx->wBitsPerSample = 32;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
}
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
IsEqualGUID(&fmtex->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT)){
fmtex->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
device->pwfx->wBitsPerSample = 32;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
}
device->pwfx->wBitsPerSample = 32;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
device->pwfx->wBitsPerSample = 16;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
device->pwfx->wBitsPerSample = 8;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
device->pwfx->nChannels = (passed_fmt->nChannels == 2) ? 1 : 2;
device->pwfx->wBitsPerSample = passed_fmt->wBitsPerSample;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
device->pwfx->wBitsPerSample = 32;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
device->pwfx->wBitsPerSample = 16;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
device->pwfx->wBitsPerSample = 8;
device->pwfx->nAvgBytesPerSec = passed_fmt->nSamplesPerSec * device->pwfx->nBlockAlign;
device->pwfx->nBlockAlign = passed_fmt->nChannels * (device->pwfx->wBitsPerSample / 8);
if(device->pwfx->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
fmtex->Samples.wValidBitsPerSample = device->pwfx->wBitsPerSample;
err = DSOUND_ReopenDevice(device, FALSE);
if(SUCCEEDED(err))
goto opened;
WARN("No formats could be opened\n");
goto done;
opened:
err = DSOUND_PrimaryOpen(device);
if (err != DS_OK) {
WARN("DSOUND_PrimaryOpen failed\n");
goto done;
}
if (passed_fmt->nSamplesPerSec/100 != device->pwfx->nSamplesPerSec/100 && forced && device->buffer)
{
DSOUND_PrimaryClose(device);
device->pwfx->nSamplesPerSec = passed_fmt->nSamplesPerSec;
err = DSOUND_ReopenDevice(device, TRUE);
if (FAILED(err))
WARN("DSOUND_ReopenDevice(2) failed: %08x\n", err);
else if (FAILED((err = DSOUND_PrimaryOpen(device))))
WARN("DSOUND_PrimaryOpen(2) failed: %08x\n", err);
}
device->mix_buffer_len = DSOUND_bufpos_to_mixpos(device, device->buflen);
device->mix_buffer = HeapReAlloc(GetProcessHeap(), 0, device->mix_buffer, device->mix_buffer_len);
FillMemory(device->mix_buffer, device->mix_buffer_len, 0);
device->mixfunction = mixfunctions[device->pwfx->wBitsPerSample/8 - 1];
device->normfunction = normfunctions[device->pwfx->wBitsPerSample/8 - 1];
if (old_fmt->nSamplesPerSec != device->pwfx->nSamplesPerSec ||
old_fmt->wBitsPerSample != device->pwfx->wBitsPerSample ||
old_fmt->nChannels != device->pwfx->nChannels) {
IDirectSoundBufferImpl** dsb = device->buffers;
for (i = 0; i < device->nrofbuffers; i++, dsb++) {
/* **** */
RtlAcquireResourceExclusive(&(*dsb)->lock, TRUE);
(*dsb)->freqAdjust = ((DWORD64)(*dsb)->freq << DSOUND_FREQSHIFT) / device->pwfx->nSamplesPerSec;
DSOUND_RecalcFormat((*dsb));
(*dsb)->primary_mixpos = 0;
RtlReleaseResource(&(*dsb)->lock);
/* **** */
}
}
done:
LeaveCriticalSection(&(device->mixlock));
RtlReleaseResource(&(device->buffer_list_lock));
/* **** */
HeapFree(GetProcessHeap(), 0, old_fmt);
return err;
}
/*******************************************************************************
* PrimaryBuffer
*/
static inline IDirectSoundBufferImpl *impl_from_IDirectSoundBuffer(IDirectSoundBuffer *iface)
{
/* IDirectSoundBuffer and IDirectSoundBuffer8 use the same iface. */
return CONTAINING_RECORD(iface, IDirectSoundBufferImpl, IDirectSoundBuffer8_iface);
}
/* This sets this format for the primary buffer only */
static HRESULT WINAPI PrimaryBufferImpl_SetFormat(IDirectSoundBuffer *iface,
const WAVEFORMATEX *wfex)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
TRACE("(%p,%p)\n", iface, wfex);
return primarybuffer_SetFormat(This->device, wfex);
}
static HRESULT WINAPI PrimaryBufferImpl_SetVolume(IDirectSoundBuffer *iface, LONG vol)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
HRESULT hr;
float lvol, rvol;
TRACE("(%p,%d)\n", iface, vol);
if (!(This->dsbd.dwFlags & DSBCAPS_CTRLVOLUME)) {
WARN("control unavailable\n");
return DSERR_CONTROLUNAVAIL;
}
if ((vol > DSBVOLUME_MAX) || (vol < DSBVOLUME_MIN)) {
WARN("invalid parameter: vol = %d\n", vol);
return DSERR_INVALIDPARAM;
}
/* **** */
EnterCriticalSection(&device->mixlock);
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 0, &lvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
if(device->pwfx->nChannels > 1){
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 1, &rvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
}else
rvol = 1;
device->volpan.dwTotalLeftAmpFactor = ((UINT16)(lvol * (DWORD)0xFFFF));
device->volpan.dwTotalRightAmpFactor = ((UINT16)(rvol * (DWORD)0xFFFF));
DSOUND_AmpFactorToVolPan(&device->volpan);
if (vol != device->volpan.lVolume) {
device->volpan.lVolume=vol;
DSOUND_RecalcVolPan(&device->volpan);
lvol = (float)((DWORD)(device->volpan.dwTotalLeftAmpFactor & 0xFFFF) / (float)0xFFFF);
hr = IAudioStreamVolume_SetChannelVolume(device->volume, 0, lvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("SetChannelVolume failed: %08x\n", hr);
return hr;
}
if(device->pwfx->nChannels > 1){
rvol = (float)((DWORD)(device->volpan.dwTotalRightAmpFactor & 0xFFFF) / (float)0xFFFF);
hr = IAudioStreamVolume_SetChannelVolume(device->volume, 1, rvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("SetChannelVolume failed: %08x\n", hr);
return hr;
}
}
}
LeaveCriticalSection(&(device->mixlock));
/* **** */
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_GetVolume(IDirectSoundBuffer *iface, LONG *vol)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
float lvol, rvol;
HRESULT hr;
TRACE("(%p,%p)\n", iface, vol);
if (!(This->dsbd.dwFlags & DSBCAPS_CTRLVOLUME)) {
WARN("control unavailable\n");
return DSERR_CONTROLUNAVAIL;
}
if (vol == NULL) {
WARN("invalid parameter: vol = NULL\n");
return DSERR_INVALIDPARAM;
}
EnterCriticalSection(&device->mixlock);
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 0, &lvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
if(device->pwfx->nChannels > 1){
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 1, &rvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
}else
rvol = 1;
device->volpan.dwTotalLeftAmpFactor = ((UINT16)(lvol * (DWORD)0xFFFF));
device->volpan.dwTotalRightAmpFactor = ((UINT16)(rvol * (DWORD)0xFFFF));
DSOUND_AmpFactorToVolPan(&device->volpan);
*vol = device->volpan.lVolume;
LeaveCriticalSection(&device->mixlock);
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_SetFrequency(IDirectSoundBuffer *iface, DWORD freq)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
TRACE("(%p,%d)\n",This,freq);
/* You cannot set the frequency of the primary buffer */
WARN("control unavailable\n");
return DSERR_CONTROLUNAVAIL;
}
static HRESULT WINAPI PrimaryBufferImpl_Play(IDirectSoundBuffer *iface, DWORD reserved1,
DWORD reserved2, DWORD flags)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%08x,%08x,%08x)\n", iface, reserved1, reserved2, flags);
if (!(flags & DSBPLAY_LOOPING)) {
WARN("invalid parameter: flags = %08x\n", flags);
return DSERR_INVALIDPARAM;
}
/* **** */
EnterCriticalSection(&(device->mixlock));
if (device->state == STATE_STOPPED)
device->state = STATE_STARTING;
else if (device->state == STATE_STOPPING)
device->state = STATE_PLAYING;
LeaveCriticalSection(&(device->mixlock));
/* **** */
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_Stop(IDirectSoundBuffer *iface)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p)\n", iface);
/* **** */
EnterCriticalSection(&(device->mixlock));
if (device->state == STATE_PLAYING)
device->state = STATE_STOPPING;
else if (device->state == STATE_STARTING)
device->state = STATE_STOPPED;
LeaveCriticalSection(&(device->mixlock));
/* **** */
return DS_OK;
}
static ULONG WINAPI PrimaryBufferImpl_AddRef(IDirectSoundBuffer *iface)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
ULONG ref = InterlockedIncrement(&(This->ref));
TRACE("(%p) ref was %d\n", This, ref - 1);
if(ref == 1)
InterlockedIncrement(&This->numIfaces);
return ref;
}
void primarybuffer_destroy(IDirectSoundBufferImpl *This)
{
This->device->primary = NULL;
HeapFree(GetProcessHeap(), 0, This);
TRACE("(%p) released\n", This);
}
static ULONG WINAPI PrimaryBufferImpl_Release(IDirectSoundBuffer *iface)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DWORD ref = InterlockedDecrement(&(This->ref));
TRACE("(%p) ref was %d\n", This, ref + 1);
if (!ref && !InterlockedDecrement(&This->numIfaces))
primarybuffer_destroy(This);
return ref;
}
static HRESULT WINAPI PrimaryBufferImpl_GetCurrentPosition(IDirectSoundBuffer *iface,
DWORD *playpos, DWORD *writepos)
{
HRESULT hres;
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%p,%p)\n", iface, playpos, writepos);
/* **** */
EnterCriticalSection(&(device->mixlock));
hres = DSOUND_PrimaryGetPosition(device, playpos, writepos);
if (hres != DS_OK) {
WARN("DSOUND_PrimaryGetPosition failed\n");
LeaveCriticalSection(&(device->mixlock));
return hres;
}
if (writepos) {
if (device->state != STATE_STOPPED)
/* apply the documented 10ms lead to writepos */
*writepos += device->writelead;
while (*writepos >= device->buflen) *writepos -= device->buflen;
}
LeaveCriticalSection(&(device->mixlock));
/* **** */
TRACE("playpos = %d, writepos = %d (%p, time=%d)\n", playpos?*playpos:0, writepos?*writepos:0, device, GetTickCount());
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_GetStatus(IDirectSoundBuffer *iface, DWORD *status)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%p)\n", iface, status);
if (status == NULL) {
WARN("invalid parameter: status == NULL\n");
return DSERR_INVALIDPARAM;
}
*status = 0;
if ((device->state == STATE_STARTING) ||
(device->state == STATE_PLAYING))
*status |= DSBSTATUS_PLAYING | DSBSTATUS_LOOPING;
TRACE("status=%x\n", *status);
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_GetFormat(IDirectSoundBuffer *iface, WAVEFORMATEX *lpwf,
DWORD wfsize, DWORD *wfwritten)
{
DWORD size;
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%p,%d,%p)\n", iface, lpwf, wfsize, wfwritten);
size = sizeof(WAVEFORMATEX) + device->pwfx->cbSize;
if (lpwf) { /* NULL is valid */
if (wfsize >= size) {
CopyMemory(lpwf,device->pwfx,size);
if (wfwritten)
*wfwritten = size;
} else {
WARN("invalid parameter: wfsize too small\n");
if (wfwritten)
*wfwritten = 0;
return DSERR_INVALIDPARAM;
}
} else {
if (wfwritten)
*wfwritten = sizeof(WAVEFORMATEX) + device->pwfx->cbSize;
else {
WARN("invalid parameter: wfwritten == NULL\n");
return DSERR_INVALIDPARAM;
}
}
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_Lock(IDirectSoundBuffer *iface, DWORD writecursor,
DWORD writebytes, void **lplpaudioptr1, DWORD *audiobytes1, void **lplpaudioptr2,
DWORD *audiobytes2, DWORD flags)
{
HRESULT hres;
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%d,%d,%p,%p,%p,%p,0x%08x) at %d\n",
iface,
writecursor,
writebytes,
lplpaudioptr1,
audiobytes1,
lplpaudioptr2,
audiobytes2,
flags,
GetTickCount()
);
if (!audiobytes1)
return DSERR_INVALIDPARAM;
if (device->priolevel != DSSCL_WRITEPRIMARY) {
WARN("failed priority check!\n");
return DSERR_PRIOLEVELNEEDED;
}
/* when this flag is set, writecursor is meaningless and must be calculated */
if (flags & DSBLOCK_FROMWRITECURSOR) {
/* GetCurrentPosition does too much magic to duplicate here */
hres = IDirectSoundBuffer_GetCurrentPosition(iface, NULL, &writecursor);
if (hres != DS_OK) {
WARN("IDirectSoundBuffer_GetCurrentPosition failed\n");
return hres;
}
}
/* when this flag is set, writebytes is meaningless and must be set */
if (flags & DSBLOCK_ENTIREBUFFER)
writebytes = device->buflen;
if (writecursor >= device->buflen) {
WARN("Invalid parameter, writecursor: %u >= buflen: %u\n",
writecursor, device->buflen);
return DSERR_INVALIDPARAM;
}
if (writebytes > device->buflen) {
WARN("Invalid parameter, writebytes: %u > buflen: %u\n",
writebytes, device->buflen);
return DSERR_INVALIDPARAM;
}
if (writecursor+writebytes <= device->buflen) {
*(LPBYTE*)lplpaudioptr1 = device->buffer+writecursor;
*audiobytes1 = writebytes;
if (lplpaudioptr2)
*(LPBYTE*)lplpaudioptr2 = NULL;
if (audiobytes2)
*audiobytes2 = 0;
TRACE("->%d.0\n",writebytes);
} else {
*(LPBYTE*)lplpaudioptr1 = device->buffer+writecursor;
*audiobytes1 = device->buflen-writecursor;
if (lplpaudioptr2)
*(LPBYTE*)lplpaudioptr2 = device->buffer;
if (audiobytes2)
*audiobytes2 = writebytes-(device->buflen-writecursor);
TRACE("->%d.%d\n",*audiobytes1,audiobytes2?*audiobytes2:0);
}
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_SetCurrentPosition(IDirectSoundBuffer *iface, DWORD newpos)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
TRACE("(%p,%d)\n",This,newpos);
/* You cannot set the position of the primary buffer */
WARN("invalid call\n");
return DSERR_INVALIDCALL;
}
static HRESULT WINAPI PrimaryBufferImpl_SetPan(IDirectSoundBuffer *iface, LONG pan)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
float lvol, rvol;
HRESULT hr;
TRACE("(%p,%d)\n", iface, pan);
if (!(This->dsbd.dwFlags & DSBCAPS_CTRLPAN)) {
WARN("control unavailable\n");
return DSERR_CONTROLUNAVAIL;
}
if ((pan > DSBPAN_RIGHT) || (pan < DSBPAN_LEFT)) {
WARN("invalid parameter: pan = %d\n", pan);
return DSERR_INVALIDPARAM;
}
/* **** */
EnterCriticalSection(&device->mixlock);
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 0, &lvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
if(device->pwfx->nChannels > 1){
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 1, &rvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
}else
rvol = 1;
device->volpan.dwTotalLeftAmpFactor = ((UINT16)(lvol * (DWORD)0xFFFF));
device->volpan.dwTotalRightAmpFactor = ((UINT16)(rvol * (DWORD)0xFFFF));
DSOUND_AmpFactorToVolPan(&device->volpan);
if (pan != device->volpan.lPan) {
device->volpan.lPan=pan;
DSOUND_RecalcVolPan(&device->volpan);
lvol = (float)((DWORD)(device->volpan.dwTotalLeftAmpFactor & 0xFFFF) / (float)0xFFFF);
hr = IAudioStreamVolume_SetChannelVolume(device->volume, 0, lvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("SetChannelVolume failed: %08x\n", hr);
return hr;
}
if(device->pwfx->nChannels > 1){
rvol = (float)((DWORD)(device->volpan.dwTotalRightAmpFactor & 0xFFFF) / (float)0xFFFF);
hr = IAudioStreamVolume_SetChannelVolume(device->volume, 1, rvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("SetChannelVolume failed: %08x\n", hr);
return hr;
}
}
}
LeaveCriticalSection(&device->mixlock);
/* **** */
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_GetPan(IDirectSoundBuffer *iface, LONG *pan)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
float lvol, rvol;
HRESULT hr;
TRACE("(%p,%p)\n", iface, pan);
if (!(This->dsbd.dwFlags & DSBCAPS_CTRLPAN)) {
WARN("control unavailable\n");
return DSERR_CONTROLUNAVAIL;
}
if (pan == NULL) {
WARN("invalid parameter: pan == NULL\n");
return DSERR_INVALIDPARAM;
}
EnterCriticalSection(&device->mixlock);
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 0, &lvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
if(device->pwfx->nChannels > 1){
hr = IAudioStreamVolume_GetChannelVolume(device->volume, 1, &rvol);
if(FAILED(hr)){
LeaveCriticalSection(&device->mixlock);
WARN("GetChannelVolume failed: %08x\n", hr);
return hr;
}
}else
rvol = 1;
device->volpan.dwTotalLeftAmpFactor = ((UINT16)(lvol * (DWORD)0xFFFF));
device->volpan.dwTotalRightAmpFactor = ((UINT16)(rvol * (DWORD)0xFFFF));
DSOUND_AmpFactorToVolPan(&device->volpan);
*pan = device->volpan.lPan;
LeaveCriticalSection(&device->mixlock);
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_Unlock(IDirectSoundBuffer *iface, void *p1, DWORD x1,
void *p2, DWORD x2)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%p,%d,%p,%d)\n", iface, p1, x1, p2, x2);
if (device->priolevel != DSSCL_WRITEPRIMARY) {
WARN("failed priority check!\n");
return DSERR_PRIOLEVELNEEDED;
}
if((p1 && ((BYTE*)p1 < device->buffer ||
(BYTE*)p1 >= device->buffer + device->buflen)) ||
(p2 && ((BYTE*)p2 < device->buffer ||
(BYTE*)p2 >= device->buffer + device->buflen)))
return DSERR_INVALIDPARAM;
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_Restore(IDirectSoundBuffer *iface)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
FIXME("(%p):stub\n",This);
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_GetFrequency(IDirectSoundBuffer *iface, DWORD *freq)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%p)\n", iface, freq);
if (freq == NULL) {
WARN("invalid parameter: freq == NULL\n");
return DSERR_INVALIDPARAM;
}
if (!(This->dsbd.dwFlags & DSBCAPS_CTRLFREQUENCY)) {
WARN("control unavailable\n");
return DSERR_CONTROLUNAVAIL;
}
*freq = device->pwfx->nSamplesPerSec;
TRACE("-> %d\n", *freq);
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_Initialize(IDirectSoundBuffer *iface, IDirectSound *dsound,
const DSBUFFERDESC *dbsd)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
WARN("(%p) already initialized\n", This);
return DSERR_ALREADYINITIALIZED;
}
static HRESULT WINAPI PrimaryBufferImpl_GetCaps(IDirectSoundBuffer *iface, DSBCAPS *caps)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
DirectSoundDevice *device = This->device;
TRACE("(%p,%p)\n", iface, caps);
if (caps == NULL) {
WARN("invalid parameter: caps == NULL\n");
return DSERR_INVALIDPARAM;
}
if (caps->dwSize < sizeof(*caps)) {
WARN("invalid parameter: caps->dwSize = %d\n", caps->dwSize);
return DSERR_INVALIDPARAM;
}
caps->dwFlags = This->dsbd.dwFlags;
caps->dwBufferBytes = device->buflen;
/* Windows reports these as zero */
caps->dwUnlockTransferRate = 0;
caps->dwPlayCpuOverhead = 0;
return DS_OK;
}
static HRESULT WINAPI PrimaryBufferImpl_QueryInterface(IDirectSoundBuffer *iface, REFIID riid,
void **ppobj)
{
IDirectSoundBufferImpl *This = impl_from_IDirectSoundBuffer(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(riid), ppobj);
if (ppobj == NULL) {
WARN("invalid parameter\n");
return E_INVALIDARG;
}
*ppobj = NULL; /* assume failure */
if ( IsEqualGUID(riid, &IID_IUnknown) ||
IsEqualGUID(riid, &IID_IDirectSoundBuffer) ) {
IDirectSoundBuffer_AddRef(iface);
*ppobj = iface;
return S_OK;
}
/* DirectSoundBuffer and DirectSoundBuffer8 are different and */
/* a primary buffer can't have a DirectSoundBuffer8 interface */
if ( IsEqualGUID( &IID_IDirectSoundBuffer8, riid ) ) {
WARN("app requested DirectSoundBuffer8 on primary buffer\n");
return E_NOINTERFACE;
}
if ( IsEqualGUID( &IID_IDirectSoundNotify, riid ) ) {
ERR("app requested IDirectSoundNotify on primary buffer\n");
/* FIXME: should we support this? */
return E_NOINTERFACE;
}
if ( IsEqualGUID( &IID_IDirectSound3DBuffer, riid ) ) {
ERR("app requested IDirectSound3DBuffer on primary buffer\n");
return E_NOINTERFACE;
}
if ( IsEqualGUID( &IID_IDirectSound3DListener, riid ) ) {
*ppobj = &This->IDirectSound3DListener_iface;
IDirectSound3DListener_AddRef(&This->IDirectSound3DListener_iface);
return S_OK;
}
if ( IsEqualGUID( &IID_IKsPropertySet, riid ) ) {
*ppobj = &This->IKsPropertySet_iface;
IKsPropertySet_AddRef(&This->IKsPropertySet_iface);
return S_OK;
}
FIXME( "Unknown IID %s\n", debugstr_guid( riid ) );
return E_NOINTERFACE;
}
static const IDirectSoundBufferVtbl dspbvt =
{
PrimaryBufferImpl_QueryInterface,
PrimaryBufferImpl_AddRef,
PrimaryBufferImpl_Release,
PrimaryBufferImpl_GetCaps,
PrimaryBufferImpl_GetCurrentPosition,
PrimaryBufferImpl_GetFormat,
PrimaryBufferImpl_GetVolume,
PrimaryBufferImpl_GetPan,
PrimaryBufferImpl_GetFrequency,
PrimaryBufferImpl_GetStatus,
PrimaryBufferImpl_Initialize,
PrimaryBufferImpl_Lock,
PrimaryBufferImpl_Play,
PrimaryBufferImpl_SetCurrentPosition,
PrimaryBufferImpl_SetFormat,
PrimaryBufferImpl_SetVolume,
PrimaryBufferImpl_SetPan,
PrimaryBufferImpl_SetFrequency,
PrimaryBufferImpl_Stop,
PrimaryBufferImpl_Unlock,
PrimaryBufferImpl_Restore
};
HRESULT primarybuffer_create(DirectSoundDevice *device, IDirectSoundBufferImpl **ppdsb,
const DSBUFFERDESC *dsbd)
{
IDirectSoundBufferImpl *dsb;
TRACE("%p,%p,%p)\n",device,ppdsb,dsbd);
if (dsbd->lpwfxFormat) {
WARN("invalid parameter: dsbd->lpwfxFormat != NULL\n");
*ppdsb = NULL;
return DSERR_INVALIDPARAM;
}
dsb = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(*dsb));
if (dsb == NULL) {
WARN("out of memory\n");
*ppdsb = NULL;
return DSERR_OUTOFMEMORY;
}
dsb->ref = 0;
dsb->ref3D = 0;
dsb->refiks = 0;
dsb->numIfaces = 0;
dsb->device = device;
dsb->IDirectSoundBuffer8_iface.lpVtbl = (IDirectSoundBuffer8Vtbl *)&dspbvt;
dsb->IDirectSound3DListener_iface.lpVtbl = &ds3dlvt;
dsb->IKsPropertySet_iface.lpVtbl = &iksbvt;
dsb->dsbd = *dsbd;
/* IDirectSound3DListener */
device->ds3dl.dwSize = sizeof(DS3DLISTENER);
device->ds3dl.vPosition.x = 0.0;
device->ds3dl.vPosition.y = 0.0;
device->ds3dl.vPosition.z = 0.0;
device->ds3dl.vVelocity.x = 0.0;
device->ds3dl.vVelocity.y = 0.0;
device->ds3dl.vVelocity.z = 0.0;
device->ds3dl.vOrientFront.x = 0.0;
device->ds3dl.vOrientFront.y = 0.0;
device->ds3dl.vOrientFront.z = 1.0;
device->ds3dl.vOrientTop.x = 0.0;
device->ds3dl.vOrientTop.y = 1.0;
device->ds3dl.vOrientTop.z = 0.0;
device->ds3dl.flDistanceFactor = DS3D_DEFAULTDISTANCEFACTOR;
device->ds3dl.flRolloffFactor = DS3D_DEFAULTROLLOFFFACTOR;
device->ds3dl.flDopplerFactor = DS3D_DEFAULTDOPPLERFACTOR;
device->ds3dl_need_recalc = TRUE;
TRACE("Created primary buffer at %p\n", dsb);
TRACE("(formattag=0x%04x,chans=%d,samplerate=%d,"
"bytespersec=%d,blockalign=%d,bitspersamp=%d,cbSize=%d)\n",
device->pwfx->wFormatTag, device->pwfx->nChannels,
device->pwfx->nSamplesPerSec, device->pwfx->nAvgBytesPerSec,
device->pwfx->nBlockAlign, device->pwfx->wBitsPerSample,
device->pwfx->cbSize);
IDirectSoundBuffer_AddRef(&dsb->IDirectSoundBuffer8_iface);
*ppdsb = dsb;
return S_OK;
}
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