HRESULT DSOUND_PrimaryGetPosition(DirectSoundDevice *device, LPDWORD playpos, LPDWORD writepos)
{
TRACE("(%p,%p,%p)\n", device, playpos, writepos);
if (device->hwbuf) {
HRESULT err=IDsDriverBuffer_GetPosition(device->hwbuf,playpos,writepos);
if (err != S_OK) {
WARN("IDsDriverBuffer_GetPosition failed\n");
return err;
}
} else {
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 void CALLBACK Capture_Notify(UINT timerID, UINT msg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
{
IDsCaptureDriverBufferImpl *This = (IDsCaptureDriverBufferImpl *)dwUser;
DWORD last_playpos, playpos;
PIDSCDRIVERBUFFER iface = (PIDSCDRIVERBUFFER)This;
/* **** */
/* Don't deadlock since there is a critical section can be held by the timer api itself while running this code */
if (!TryEnterCriticalSection(&This->pcm_crst)) return;
IDsDriverBuffer_GetPosition(iface, &playpos, NULL);
last_playpos = This->notify->playpos;
This->notify->playpos = playpos;
if (snd_pcm_state(This->pcm) != SND_PCM_STATE_RUNNING || last_playpos == playpos || !This->notify->nrofnotifies || !This->notify->notifies)
goto done;
if (playpos < last_playpos)
{
Capture_CheckNotify(This->notify, last_playpos, This->mmap_buflen_bytes);
if (playpos)
Capture_CheckNotify(This->notify, 0, playpos);
}
else Capture_CheckNotify(This->notify, last_playpos, playpos - last_playpos);
done:
LeaveCriticalSection(&This->pcm_crst);
/* **** */
}
static HRESULT WINAPI IDsCaptureDriverNotifyImpl_SetNotificationPositions(PIDSDRIVERNOTIFY iface, DWORD howmuch, LPCDSBPOSITIONNOTIFY notify)
{
DWORD len = howmuch * sizeof(DSBPOSITIONNOTIFY);
unsigned i;
LPVOID notifies;
IDsCaptureDriverNotifyImpl *This = (IDsCaptureDriverNotifyImpl *)iface;
TRACE("(%p,0x%08x,%p)\n",This,howmuch,notify);
if (!notify) {
WARN("invalid parameter\n");
return DSERR_INVALIDPARAM;
}
if (TRACE_ON(dsalsa))
for (i=0;i<howmuch; ++i)
TRACE("notify at %d to %p\n", notify[i].dwOffset, notify[i].hEventNotify);
/* **** */
EnterCriticalSection(&This->buffer->pcm_crst);
/* Make an internal copy of the caller-supplied array.
* Replace the existing copy if one is already present. */
if (This->notifies)
notifies = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->notifies, len);
else
notifies = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, len);
if (!notifies)
{
LeaveCriticalSection(&This->buffer->pcm_crst);
/* **** */
return DSERR_OUTOFMEMORY;
}
This->notifies = notifies;
memcpy(This->notifies, notify, len);
This->nrofnotifies = howmuch;
IDsDriverBuffer_GetPosition((PIDSCDRIVERBUFFER)This->buffer, &This->playpos, NULL);
if (!This->timerID)
{
timeBeginPeriod(DS_TIME_RES);
This->timerID = timeSetEvent(DS_TIME_DEL, DS_TIME_RES, Capture_Notify, (DWORD_PTR)This->buffer, TIME_PERIODIC | TIME_KILL_SYNCHRONOUS);
}
LeaveCriticalSection(&This->buffer->pcm_crst);
/* **** */
return S_OK;
}
/**
* Perform mixing for a Direct Sound device. That is, go through all the
* secondary buffers (the sound bites currently playing) and mix them in
* to the primary buffer (the device buffer).
*/
static void DSOUND_PerformMix(DirectSoundDevice *device)
{
TRACE("(%p)\n", device);
/* **** */
EnterCriticalSection(&(device->mixlock));
if (device->priolevel != DSSCL_WRITEPRIMARY) {
BOOL recover = FALSE, all_stopped = FALSE;
DWORD playpos, writepos, writelead, maxq, frag, prebuff_max, prebuff_left, size1, size2, mixplaypos, mixplaypos2;
LPVOID buf1, buf2;
BOOL lock = (device->hwbuf && !(device->drvdesc.dwFlags & DSDDESC_DONTNEEDPRIMARYLOCK));
int nfiller;
/* the sound of silence */
nfiller = device->pwfx->wBitsPerSample == 8 ? 128 : 0;
/* get the position in the primary buffer */
if (DSOUND_PrimaryGetPosition(device, &playpos, &writepos) != 0){
LeaveCriticalSection(&(device->mixlock));
return;
}
TRACE("primary playpos=%d, writepos=%d, clrpos=%d, mixpos=%d, buflen=%d\n",
playpos,writepos,device->playpos,device->mixpos,device->buflen);
assert(device->playpos < device->buflen);
mixplaypos = DSOUND_bufpos_to_mixpos(device, device->playpos);
mixplaypos2 = DSOUND_bufpos_to_mixpos(device, playpos);
/* calc maximum prebuff */
prebuff_max = (device->prebuf * device->fraglen);
if (!device->hwbuf && playpos + prebuff_max >= device->helfrags * device->fraglen)
prebuff_max += device->buflen - device->helfrags * device->fraglen;
/* check how close we are to an underrun. It occurs when the writepos overtakes the mixpos */
prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
writelead = DSOUND_BufPtrDiff(device->buflen, writepos, playpos);
/* check for underrun. underrun occurs when the write position passes the mix position
* also wipe out just-played sound data */
if((prebuff_left > prebuff_max) || (device->state == STATE_STOPPED) || (device->state == STATE_STARTING)){
if (device->state == STATE_STOPPING || device->state == STATE_PLAYING)
WARN("Probable buffer underrun\n");
else TRACE("Buffer starting or buffer underrun\n");
/* recover mixing for all buffers */
recover = TRUE;
/* reset mix position to write position */
device->mixpos = writepos;
ZeroMemory(device->mix_buffer, device->mix_buffer_len);
ZeroMemory(device->buffer, device->buflen);
} else if (playpos < device->playpos) {
buf1 = device->buffer + device->playpos;
buf2 = device->buffer;
size1 = device->buflen - device->playpos;
size2 = playpos;
FillMemory(device->mix_buffer + mixplaypos, device->mix_buffer_len - mixplaypos, 0);
FillMemory(device->mix_buffer, mixplaypos2, 0);
if (lock)
IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
FillMemory(buf1, size1, nfiller);
if (playpos && (!buf2 || !size2))
FIXME("%d: (%d, %d)=>(%d, %d) There should be an additional buffer here!!\n", __LINE__, device->playpos, device->mixpos, playpos, writepos);
FillMemory(buf2, size2, nfiller);
if (lock)
IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
} else {
buf1 = device->buffer + device->playpos;
buf2 = NULL;
size1 = playpos - device->playpos;
size2 = 0;
FillMemory(device->mix_buffer + mixplaypos, mixplaypos2 - mixplaypos, 0);
if (lock)
IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, device->playpos, size1+size2, 0);
FillMemory(buf1, size1, nfiller);
if (buf2 && size2)
{
FIXME("%d: There should be no additional buffer here!!\n", __LINE__);
FillMemory(buf2, size2, nfiller);
}
if (lock)
IDsDriverBuffer_Unlock(device->hwbuf, buf1, size1, buf2, size2);
}
device->playpos = playpos;
/* find the maximum we can prebuffer from current write position */
maxq = (writelead < prebuff_max) ? (prebuff_max - writelead) : 0;
TRACE("prebuff_left = %d, prebuff_max = %dx%d=%d, writelead=%d\n",
prebuff_left, device->prebuf, device->fraglen, prebuff_max, writelead);
if (lock)
IDsDriverBuffer_Lock(device->hwbuf, &buf1, &size1, &buf2, &size2, writepos, maxq, 0);
/* do the mixing */
frag = DSOUND_MixToPrimary(device, writepos, maxq, recover, &all_stopped);
if (frag + writepos > device->buflen)
{
DWORD todo = device->buflen - writepos;
device->normfunction(device->mix_buffer + DSOUND_bufpos_to_mixpos(device, writepos), device->buffer + writepos, todo);
device->normfunction(device->mix_buffer, device->buffer, frag - todo);
}
else
device->normfunction(device->mix_buffer + DSOUND_bufpos_to_mixpos(device, writepos), device->buffer + writepos, frag);
/* update the mix position, taking wrap-around into account */
device->mixpos = writepos + frag;
device->mixpos %= device->buflen;
if (lock)
{
DWORD frag2 = (frag > size1 ? frag - size1 : 0);
frag -= frag2;
if (frag2 > size2)
{
FIXME("Buffering too much! (%d, %d, %d, %d)\n", maxq, frag, size2, frag2 - size2);
frag2 = size2;
}
IDsDriverBuffer_Unlock(device->hwbuf, buf1, frag, buf2, frag2);
}
/* update prebuff left */
prebuff_left = DSOUND_BufPtrDiff(device->buflen, device->mixpos, playpos);
/* check if have a whole fragment */
if (prebuff_left >= device->fraglen){
/* update the wave queue if using wave system */
if (!device->hwbuf)
DSOUND_WaveQueue(device, FALSE);
/* buffers are full. start playing if applicable */
if(device->state == STATE_STARTING){
TRACE("started primary buffer\n");
if(DSOUND_PrimaryPlay(device) != DS_OK){
WARN("DSOUND_PrimaryPlay failed\n");
}
else{
/* we are playing now */
device->state = STATE_PLAYING;
}
}
/* buffers are full. start stopping if applicable */
if(device->state == STATE_STOPPED){
TRACE("restarting primary buffer\n");
if(DSOUND_PrimaryPlay(device) != DS_OK){
WARN("DSOUND_PrimaryPlay failed\n");
}
else{
/* start stopping again. as soon as there is no more data, it will stop */
device->state = STATE_STOPPING;
}
}
}
/* if device was stopping, its for sure stopped when all buffers have stopped */
else if((all_stopped == TRUE) && (device->state == STATE_STOPPING)){
TRACE("All buffers have stopped. Stopping primary buffer\n");
device->state = STATE_STOPPED;
/* stop the primary buffer now */
DSOUND_PrimaryStop(device);
}
} else {
/* update the wave queue if using wave system */
if (!device->hwbuf)
DSOUND_WaveQueue(device, TRUE);
else
/* Keep alsa happy, which needs GetPosition called once every 10 ms */
IDsDriverBuffer_GetPosition(device->hwbuf, NULL, NULL);
/* in the DSSCL_WRITEPRIMARY mode, the app is totally in charge... */
if (device->state == STATE_STARTING) {
if (DSOUND_PrimaryPlay(device) != DS_OK)
WARN("DSOUND_PrimaryPlay failed\n");
else
device->state = STATE_PLAYING;
}
else if (device->state == STATE_STOPPING) {
if (DSOUND_PrimaryStop(device) != DS_OK)
WARN("DSOUND_PrimaryStop failed\n");
else
device->state = STATE_STOPPED;
}
}
LeaveCriticalSection(&(device->mixlock));
/* **** */
}
