static BOOL AppReadDataFromBuffer(LPDIRECTSOUNDCAPTUREBUFFER lpDsb, // The buffer.
DWORD dwOffset, // Our own write cursor.
LPBYTE lpbSoundData, // Start of our data.
DWORD dwSoundBytes) // Size of block to copy.
{
LPVOID lpvPtr1;
DWORD dwBytes1;
LPVOID lpvPtr2;
DWORD dwBytes2;
HRESULT hr;
// Obtain memory address of write block. This will be in two parts
// if the block wraps around.
hr = IDirectSoundCaptureBuffer_Lock( lpDsb, dwOffset, dwSoundBytes, &lpvPtr1,
&dwBytes1, &lpvPtr2, &dwBytes2, 0);
if SUCCEEDED(hr) {
// Read from pointers.
pj_memcpy(lpbSoundData, lpvPtr1, dwBytes1);
if (lpvPtr2 != NULL)
pj_memcpy(lpbSoundData+dwBytes1, lpvPtr2, dwBytes2);
// Release the data back to DirectSound.
hr = IDirectSoundCaptureBuffer_Unlock(lpDsb, lpvPtr1, dwBytes1, lpvPtr2, dwBytes2);
if SUCCEEDED(hr)
return TRUE;
}
// Lock, Unlock, or Restore failed.
return FALSE;
}
static int capture_buffer_service(capture_state_t* state)
{
HRESULT rc;
LPVOID ptr1,ptr2;
DWORD len1,len2;
DWORD capture_pos,read_pos;
rc=IDirectSoundCaptureBuffer_GetCurrentPosition(state->dscbo,&capture_pos,
&read_pos);
ok(rc==DS_OK,"IDirectSoundCaptureBuffer_GetCurrentPosition() failed: %08x\n", rc);
if (rc!=DS_OK)
return 0;
rc=IDirectSoundCaptureBuffer_Lock(state->dscbo,state->offset,state->size,
&ptr1,&len1,&ptr2,&len2,0);
ok(rc==DS_OK,"IDirectSoundCaptureBuffer_Lock() failed: %08x\n", rc);
if (rc!=DS_OK)
return 0;
rc=IDirectSoundCaptureBuffer_Unlock(state->dscbo,ptr1,len1,ptr2,len2);
ok(rc==DS_OK,"IDirectSoundCaptureBuffer_Unlock() failed: %08x\n", rc);
if (rc!=DS_OK)
return 0;
state->offset = (state->offset + state->size) % state->buffer_size;
return 1;
}
/*minsamples is a hint*/
unsigned int DSOUND_Capture_Update(void *ctx, unsigned char *buffer, unsigned int minbytes, unsigned int maxbytes)
{
dsndcapture_t *c = ctx;
HRESULT hr;
LPBYTE lpbuf1 = NULL;
LPBYTE lpbuf2 = NULL;
DWORD dwsize1 = 0;
DWORD dwsize2 = 0;
DWORD capturePos;
DWORD readPos;
long filled;
// Query to see how much data is in buffer.
hr = IDirectSoundCaptureBuffer_GetCurrentPosition(c->DSCaptureBuffer, &capturePos, &readPos);
if (hr != DS_OK)
{
return 0;
}
filled = readPos - c->lastreadpos;
if (filled < 0)
filled += bufferbytes; // unwrap offset
if (filled > maxbytes) //figure out how much we need to empty it by, and if that's enough to be worthwhile.
filled = maxbytes;
else if (filled < minbytes)
return 0;
// filled /= inputwidth;
// filled *= inputwidth;
// Lock free space in the DS
hr = IDirectSoundCaptureBuffer_Lock(c->DSCaptureBuffer, c->lastreadpos, filled, (void **) &lpbuf1, &dwsize1, (void **) &lpbuf2, &dwsize2, 0);
if (hr == DS_OK)
{
// Copy from DS to the buffer
memcpy(buffer, lpbuf1, dwsize1);
if(lpbuf2 != NULL)
{
memcpy(buffer+dwsize1, lpbuf2, dwsize2);
}
// Update our buffer offset and unlock sound buffer
c->lastreadpos = (c->lastreadpos + dwsize1 + dwsize2) % bufferbytes;
IDirectSoundCaptureBuffer_Unlock(c->DSCaptureBuffer, lpbuf1, dwsize1, lpbuf2, dwsize2);
}
else
{
return 0;
}
return filled;
}
static void *__playback_thread(void *param)
{
tdav_producer_dsound_t* dsound = (tdav_producer_dsound_t*)param;
HRESULT hr;
LPVOID lpvAudio1, lpvAudio2;
DWORD dwBytesAudio1, dwBytesAudio2;
TSK_DEBUG_INFO("__record_thread -- START");
SetPriorityClass(GetCurrentThread(), REALTIME_PRIORITY_CLASS);
for(;;){
DWORD dwEvent = WaitForMultipleObjects(sizeof(dsound->notifEvents)/sizeof(HANDLE), dsound->notifEvents, FALSE, INFINITE);
if(!dsound->started){
break;
}
else {
// lock
if((hr = IDirectSoundCaptureBuffer_Lock(dsound->captureBuffer, (dwEvent * dsound->bytes_per_notif), dsound->bytes_per_notif, &lpvAudio1, &dwBytesAudio1, &lpvAudio2, &dwBytesAudio2, 0)) != DS_OK){
tdav_win32_print_error("IDirectSoundCaptureBuffer_Lock", hr);
goto next;
}
if(TMEDIA_PRODUCER(dsound)->enc_cb.callback){
if(lpvAudio2){
TMEDIA_PRODUCER(dsound)->enc_cb.callback(TMEDIA_PRODUCER(dsound)->enc_cb.callback_data, lpvAudio1, dwBytesAudio1);
TMEDIA_PRODUCER(dsound)->enc_cb.callback(TMEDIA_PRODUCER(dsound)->enc_cb.callback_data, lpvAudio2, dwBytesAudio2);
}
else{
TMEDIA_PRODUCER(dsound)->enc_cb.callback(TMEDIA_PRODUCER(dsound)->enc_cb.callback_data, lpvAudio1, dwBytesAudio1);
}
}
// unlock
if((hr = IDirectSoundCaptureBuffer_Unlock(dsound->captureBuffer, lpvAudio1, dwBytesAudio1, lpvAudio2, dwBytesAudio2)) != DS_OK){
tdav_win32_print_error("IDirectSoundCaptureBuffer_Unlock", hr);
goto next;
}
next:;
}
}
TSK_DEBUG_INFO("__record_thread -- STOP");
return tsk_null;
}
static ALCuint DSoundAvailableSamples(ALCdevice *pDevice)
{
DSoundCaptureData *pData = pDevice->ExtraData;
DWORD dwRead, dwCursor, dwBufferBytes, dwNumBytes;
void *pvAudio1, *pvAudio2;
DWORD dwAudioBytes1, dwAudioBytes2;
DWORD FrameSize;
HRESULT hr;
if(!pDevice->Connected)
goto done;
FrameSize = FrameSizeFromDevFmt(pDevice->FmtChans, pDevice->FmtType);
dwBufferBytes = pData->dwBufferBytes;
dwCursor = pData->dwCursor;
hr = IDirectSoundCaptureBuffer_GetCurrentPosition(pData->DSCbuffer, NULL, &dwRead);
if(SUCCEEDED(hr))
{
dwNumBytes = (dwBufferBytes + dwRead - dwCursor) % dwBufferBytes;
if(dwNumBytes == 0)
goto done;
hr = IDirectSoundCaptureBuffer_Lock(pData->DSCbuffer,
dwCursor, dwNumBytes,
&pvAudio1, &dwAudioBytes1,
&pvAudio2, &dwAudioBytes2, 0);
}
if(SUCCEEDED(hr))
{
WriteRingBuffer(pData->pRing, pvAudio1, dwAudioBytes1/FrameSize);
if(pvAudio2 != NULL)
WriteRingBuffer(pData->pRing, pvAudio2, dwAudioBytes2/FrameSize);
hr = IDirectSoundCaptureBuffer_Unlock(pData->DSCbuffer,
pvAudio1, dwAudioBytes1,
pvAudio2, dwAudioBytes2);
pData->dwCursor = (dwCursor + dwAudioBytes1 + dwAudioBytes2) % dwBufferBytes;
}
if(FAILED(hr))
{
ERR("update failed: 0x%08lx\n", hr);
aluHandleDisconnect(pDevice);
}
done:
return RingBufferSize(pData->pRing);
}
static ALCuint DSoundAvailableSamples(ALCdevice *Device)
{
DSoundCaptureData *data = Device->ExtraData;
DWORD ReadCursor, LastCursor, BufferBytes, NumBytes;
VOID *ReadPtr1, *ReadPtr2;
DWORD ReadCnt1, ReadCnt2;
DWORD FrameSize;
HRESULT hr;
if(!Device->Connected)
goto done;
FrameSize = FrameSizeFromDevFmt(Device->FmtChans, Device->FmtType);
BufferBytes = data->BufferBytes;
LastCursor = data->Cursor;
hr = IDirectSoundCaptureBuffer_GetCurrentPosition(data->DSCbuffer, NULL, &ReadCursor);
if(SUCCEEDED(hr))
{
NumBytes = (ReadCursor-LastCursor + BufferBytes) % BufferBytes;
if(NumBytes == 0)
goto done;
hr = IDirectSoundCaptureBuffer_Lock(data->DSCbuffer, LastCursor, NumBytes,
&ReadPtr1, &ReadCnt1,
&ReadPtr2, &ReadCnt2, 0);
}
if(SUCCEEDED(hr))
{
WriteRingBuffer(data->Ring, ReadPtr1, ReadCnt1/FrameSize);
if(ReadPtr2 != NULL)
WriteRingBuffer(data->Ring, ReadPtr2, ReadCnt2/FrameSize);
hr = IDirectSoundCaptureBuffer_Unlock(data->DSCbuffer,
ReadPtr1, ReadCnt1,
ReadPtr2, ReadCnt2);
data->Cursor = (LastCursor+ReadCnt1+ReadCnt2) % BufferBytes;
}
if(FAILED(hr))
{
ERR("update failed: 0x%08lx\n", hr);
aluHandleDisconnect(Device);
}
done:
return RingBufferSize(data->Ring);
}
static int
DSOUND_CaptureFromDevice(_THIS, void *buffer, int buflen)
{
struct SDL_PrivateAudioData *h = this->hidden;
DWORD junk, cursor, ptr1len, ptr2len;
VOID *ptr1, *ptr2;
SDL_assert(buflen == this->spec.size);
while (SDL_TRUE) {
if (SDL_AtomicGet(&this->shutdown)) { /* in case the buffer froze... */
SDL_memset(buffer, this->spec.silence, buflen);
return buflen;
}
if (IDirectSoundCaptureBuffer_GetCurrentPosition(h->capturebuf, &junk, &cursor) != DS_OK) {
return -1;
}
if ((cursor / this->spec.size) == h->lastchunk) {
SDL_Delay(1); /* FIXME: find out how much time is left and sleep that long */
} else {
break;
}
}
if (IDirectSoundCaptureBuffer_Lock(h->capturebuf, h->lastchunk * this->spec.size, this->spec.size, &ptr1, &ptr1len, &ptr2, &ptr2len, 0) != DS_OK) {
return -1;
}
SDL_assert(ptr1len == this->spec.size);
SDL_assert(ptr2 == NULL);
SDL_assert(ptr2len == 0);
SDL_memcpy(buffer, ptr1, ptr1len);
if (IDirectSoundCaptureBuffer_Unlock(h->capturebuf, ptr1, ptr1len, ptr2, ptr2len) != DS_OK) {
return -1;
}
h->lastchunk = (h->lastchunk + 1) % h->num_buffers;
return ptr1len;
}
static void
gst_directsound_src_reset (GstAudioSrc * asrc)
{
GstDirectSoundSrc *dsoundsrc;
LPVOID pLockedBuffer = NULL;
DWORD dwSizeBuffer = 0;
GST_DEBUG_OBJECT (asrc, "reset directsoundsrc");
dsoundsrc = GST_DIRECTSOUND_SRC (asrc);
GST_DSOUND_LOCK (dsoundsrc);
dsoundsrc->reset_while_sleeping = TRUE;
/* Interrupt read sleep if required */
if (dsoundsrc->read_wait_clock_id != NULL)
gst_clock_id_unschedule (dsoundsrc->read_wait_clock_id);
if (dsoundsrc->pDSBSecondary) {
/*stop capturing */
HRESULT hRes = IDirectSoundCaptureBuffer_Stop (dsoundsrc->pDSBSecondary);
/*reset position */
/* hRes = IDirectSoundCaptureBuffer_SetCurrentPosition (dsoundsrc->pDSBSecondary, 0); */
/*reset the buffer */
hRes = IDirectSoundCaptureBuffer_Lock (dsoundsrc->pDSBSecondary,
dsoundsrc->current_circular_offset, dsoundsrc->buffer_size,
pLockedBuffer, &dwSizeBuffer, NULL, NULL, 0L);
if (SUCCEEDED (hRes)) {
memset (pLockedBuffer, 0, dwSizeBuffer);
hRes =
IDirectSoundCaptureBuffer_Unlock (dsoundsrc->pDSBSecondary,
pLockedBuffer, dwSizeBuffer, NULL, 0);
}
dsoundsrc->current_circular_offset = 0;
}
GST_DSOUND_UNLOCK (dsoundsrc);
}
static void
gst_directsound_src_reset (GstAudioSrc * asrc)
{
GstDirectSoundSrc *dsoundsrc;
LPVOID pLockedBuffer = NULL;
DWORD dwSizeBuffer = 0;
GST_DEBUG_OBJECT (asrc, "reset directsoundsrc");
dsoundsrc = GST_DIRECTSOUND_SRC (asrc);
#if 0
IDirectSoundCaptureBuffer_Stop (dsoundsrc->pDSBSecondary);
#endif
GST_DSOUND_LOCK (dsoundsrc);
if (dsoundsrc->pDSBSecondary) {
/*stop capturing */
HRESULT hRes = IDirectSoundCaptureBuffer_Stop (dsoundsrc->pDSBSecondary);
/*reset position */
/* hRes = IDirectSoundCaptureBuffer_SetCurrentPosition (dsoundsrc->pDSBSecondary, 0); */
/*reset the buffer */
hRes = IDirectSoundCaptureBuffer_Lock (dsoundsrc->pDSBSecondary,
dsoundsrc->current_circular_offset, dsoundsrc->buffer_size,
pLockedBuffer, &dwSizeBuffer, NULL, NULL, 0L);
if (SUCCEEDED (hRes)) {
memset (pLockedBuffer, 0, dwSizeBuffer);
hRes =
IDirectSoundCaptureBuffer_Unlock (dsoundsrc->pDSBSecondary,
pLockedBuffer, dwSizeBuffer, NULL, 0);
}
dsoundsrc->current_circular_offset = 0;
}
GST_DSOUND_UNLOCK (dsoundsrc);
}
HRESULT DSW_ReadBlock( DSoundWrapper *dsw, char *buf, long numBytes )
{
HRESULT hr;
LPBYTE lpbuf1 = NULL;
LPBYTE lpbuf2 = NULL;
DWORD dwsize1 = 0;
DWORD dwsize2 = 0;
// Lock free space in the DS
hr = IDirectSoundCaptureBuffer_Lock ( dsw->dsw_InputBuffer, dsw->dsw_ReadOffset, numBytes, (void **) &lpbuf1, &dwsize1,
(void **) &lpbuf2, &dwsize2, 0);
if (hr == DS_OK)
{
// Copy from DS to the buffer
CopyMemory( buf, lpbuf1, dwsize1);
if(lpbuf2 != NULL)
{
CopyMemory( buf+dwsize1, lpbuf2, dwsize2);
}
// Update our buffer offset and unlock sound buffer
dsw->dsw_ReadOffset = (dsw->dsw_ReadOffset + dwsize1 + dwsize2) % dsw->dsw_InputSize;
IDirectSoundCaptureBuffer_Unlock ( dsw->dsw_InputBuffer, lpbuf1, dwsize1, lpbuf2, dwsize2);
}
return hr;
}
/*
return number of readed bytes */
static guint
gst_directsound_src_read (GstAudioSrc * asrc, gpointer data, guint length,
GstClockTime * timestamp)
{
GstDirectSoundSrc *dsoundsrc;
HRESULT hRes; /* Result for windows functions */
DWORD dwCurrentCaptureCursor = 0;
DWORD dwBufferSize = 0;
LPVOID pLockedBuffer1 = NULL;
LPVOID pLockedBuffer2 = NULL;
DWORD dwSizeBuffer1 = 0;
DWORD dwSizeBuffer2 = 0;
DWORD dwStatus = 0;
GST_DEBUG_OBJECT (asrc, "reading directsoundsrc");
dsoundsrc = GST_DIRECTSOUND_SRC (asrc);
GST_DSOUND_LOCK (dsoundsrc);
/* Get current buffer status */
hRes = IDirectSoundCaptureBuffer_GetStatus (dsoundsrc->pDSBSecondary,
&dwStatus);
/* Starting capturing if not already */
if (!(dwStatus & DSCBSTATUS_CAPTURING)) {
hRes = IDirectSoundCaptureBuffer_Start (dsoundsrc->pDSBSecondary,
DSCBSTART_LOOPING);
// Sleep (dsoundsrc->latency_time/1000);
GST_DEBUG_OBJECT (asrc, "capture started");
}
// calculate_buffersize:
while (length > dwBufferSize) {
Sleep (dsoundsrc->latency_time / 1000);
hRes =
IDirectSoundCaptureBuffer_GetCurrentPosition (dsoundsrc->pDSBSecondary,
&dwCurrentCaptureCursor, NULL);
/* calculate the buffer */
if (dwCurrentCaptureCursor < dsoundsrc->current_circular_offset) {
dwBufferSize = dsoundsrc->buffer_size -
(dsoundsrc->current_circular_offset - dwCurrentCaptureCursor);
} else {
dwBufferSize =
dwCurrentCaptureCursor - dsoundsrc->current_circular_offset;
}
} // while (...
/* Lock the buffer */
hRes = IDirectSoundCaptureBuffer_Lock (dsoundsrc->pDSBSecondary,
dsoundsrc->current_circular_offset,
length,
&pLockedBuffer1, &dwSizeBuffer1, &pLockedBuffer2, &dwSizeBuffer2, 0L);
/* Copy buffer data to another buffer */
if (hRes == DS_OK) {
memcpy (data, pLockedBuffer1, dwSizeBuffer1);
}
/* ...and if something is in another buffer */
if (pLockedBuffer2 != NULL) {
memcpy (((guchar *) data + dwSizeBuffer1), pLockedBuffer2, dwSizeBuffer2);
}
dsoundsrc->current_circular_offset += dwSizeBuffer1 + dwSizeBuffer2;
dsoundsrc->current_circular_offset %= dsoundsrc->buffer_size;
IDirectSoundCaptureBuffer_Unlock (dsoundsrc->pDSBSecondary,
pLockedBuffer1, dwSizeBuffer1, pLockedBuffer2, dwSizeBuffer2);
GST_DSOUND_UNLOCK (dsoundsrc);
/* return length (readed data size in bytes) */
return length;
}
// ////////////////////////////////////////////////////////////////////////
static BOOL sendAudioBuffer(BOOL bNow)
{
DWORD read;
static DWORD lastread=0;
HRESULT hr;
NETMSG msg;
UWORD size=0;
LPVOID lpvPtr1,lpvPtr2;
DWORD dwBytes1=0,dwBytes2=0;
hr = IDirectSoundCaptureBuffer_GetCurrentPosition(lpDirectSoundCaptureBuffer,NULL,&read);
if(hr != DS_OK)
{
return FALSE;
}
// if buffer is still pretty empty
if(lastread <= read) // non wrapped.
{
size = (UWORD) (read - lastread);
}
else // wrapped
{
size = (UWORD) (read + (captureBuff.dwBufferBytes - lastread));
}
if(!bNow)
{
if(size < ((MaxMsgSize*3)/4) )
{
return TRUE;
}
}
// send an audio packet if getting near the end of the buffer.
if(size > MaxMsgSize)
{
size = MaxMsgSize;
DBPRINTF(("NETPLAY:lost some audio\n"));
}
// lock an area
hr = IDirectSoundCaptureBuffer_Lock(lpDirectSoundCaptureBuffer, //Obtain mem add. of write block.
lastread, // start at
size, // read this much
&lpvPtr1,&dwBytes1,
&lpvPtr2,&dwBytes2,
0 //DSCBLOCK_ENTIREBUFFER
);
lastread = lastread+size;
if(lastread >captureBuff.dwBufferBytes) // wrapped
{
lastread = lastread - captureBuff.dwBufferBytes;
}
if(hr != DS_OK)
{
return FALSE;
}
// read it out
memcpy(msg.body,lpvPtr1,dwBytes1); // copy first part into buffer
if (lpvPtr2 != NULL) // second part.
{
memcpy(((UBYTE *)msg.body)+dwBytes1,lpvPtr2,dwBytes2); // buffer contents
}
// unlock area.
hr = IDirectSoundCaptureBuffer_Unlock(lpDirectSoundCaptureBuffer,
lpvPtr1,dwBytes1,
lpvPtr2,dwBytes2);
if(hr != DS_OK)
{
return FALSE;
}
// may want to compress it!
//MMRESULT acmFormatSuggest( HACMDRIVER had, LPWAVEFORMATEX pwfxSrc, LPWAVEFORMATEX pwfxDst, DWORD cbwfxDst, DWORD fdwSuggest
// send the buffer elsewhere
msg.type = AUDIOMSG;
msg.size = (UWORD)(dwBytes1+dwBytes2);
NETbcast(&msg,FALSE);
return TRUE;
}
/*
return number of readed bytes */
static guint
gst_directsound_src_read (GstAudioSrc * asrc, gpointer data, guint length,
GstClockTime * timestamp)
{
GstDirectSoundSrc *dsoundsrc;
guint64 sleep_time_ms, sleep_until;
GstClockID clock_id;
HRESULT hRes; /* Result for windows functions */
DWORD dwCurrentCaptureCursor = 0;
DWORD dwBufferSize = 0;
LPVOID pLockedBuffer1 = NULL;
LPVOID pLockedBuffer2 = NULL;
DWORD dwSizeBuffer1 = 0;
DWORD dwSizeBuffer2 = 0;
DWORD dwStatus = 0;
GST_DEBUG_OBJECT (asrc, "reading directsoundsrc");
dsoundsrc = GST_DIRECTSOUND_SRC (asrc);
GST_DSOUND_LOCK (dsoundsrc);
/* Get current buffer status */
hRes = IDirectSoundCaptureBuffer_GetStatus (dsoundsrc->pDSBSecondary,
&dwStatus);
if (FAILED (hRes)) {
GST_DSOUND_UNLOCK (dsoundsrc);
return -1;
}
/* Starting capturing if not already */
if (!(dwStatus & DSCBSTATUS_CAPTURING)) {
hRes = IDirectSoundCaptureBuffer_Start (dsoundsrc->pDSBSecondary,
DSCBSTART_LOOPING);
GST_INFO_OBJECT (asrc, "capture started");
}
/* Loop till the source has produced bytes equal to or greater than @length.
*
* DirectSound has a notification-based API that uses Windows CreateEvent()
* + WaitForSingleObject(), but it is completely useless for live streams.
*
* 1. You must schedule all events before starting capture
* 2. The events are all fired exactly once
* 3. You cannot schedule new events while a capture is running
* 4. You cannot stop/schedule/start either
*
* This means you cannot use the API while doing live looped capture and we
* must resort to this.
*
* However, this is almost as efficient as event-based capture since it's ok
* to consistently overwait by a fixed amount; the extra bytes will just end
* up being used in the next call, and the extra latency will be constant. */
while (TRUE) {
hRes =
IDirectSoundCaptureBuffer_GetCurrentPosition (dsoundsrc->pDSBSecondary,
&dwCurrentCaptureCursor, NULL);
if (FAILED (hRes)) {
GST_DSOUND_UNLOCK (dsoundsrc);
return -1;
}
/* calculate the size of the buffer that's been captured while accounting
* for wrap-arounds */
if (dwCurrentCaptureCursor < dsoundsrc->current_circular_offset) {
dwBufferSize = dsoundsrc->buffer_size -
(dsoundsrc->current_circular_offset - dwCurrentCaptureCursor);
} else {
dwBufferSize =
dwCurrentCaptureCursor - dsoundsrc->current_circular_offset;
}
if (dwBufferSize >= length) {
/* Yay, we got all the data we need */
break;
} else {
GST_DEBUG_OBJECT (asrc, "not enough data, got %lu (want at least %u)",
dwBufferSize, length);
/* If we didn't get enough data, sleep for a proportionate time */
sleep_time_ms = gst_util_uint64_scale (dsoundsrc->latency_time,
length - dwBufferSize, length * 1000);
/* Make sure we don't run in a tight loop unnecessarily */
sleep_time_ms = MAX (sleep_time_ms, 10);
/* Sleep using gst_clock_id_wait() so that we can be interrupted */
sleep_until = gst_clock_get_time (dsoundsrc->system_clock) +
sleep_time_ms * GST_MSECOND;
/* Setup the clock id wait */
if (G_UNLIKELY (dsoundsrc->read_wait_clock_id == NULL ||
gst_clock_single_shot_id_reinit (dsoundsrc->system_clock,
dsoundsrc->read_wait_clock_id, sleep_until) == FALSE)) {
if (dsoundsrc->read_wait_clock_id != NULL)
gst_clock_id_unref (dsoundsrc->read_wait_clock_id);
dsoundsrc->read_wait_clock_id =
gst_clock_new_single_shot_id (dsoundsrc->system_clock, sleep_until);
}
clock_id = dsoundsrc->read_wait_clock_id;
dsoundsrc->reset_while_sleeping = FALSE;
GST_DEBUG_OBJECT (asrc, "waiting %" G_GUINT64_FORMAT "ms for more data",
sleep_time_ms);
GST_DSOUND_UNLOCK (dsoundsrc);
gst_clock_id_wait (clock_id, NULL);
GST_DSOUND_LOCK (dsoundsrc);
if (dsoundsrc->reset_while_sleeping == TRUE) {
GST_DEBUG_OBJECT (asrc, "reset while sleeping, cancelled read");
GST_DSOUND_UNLOCK (dsoundsrc);
return -1;
}
}
}
GST_DEBUG_OBJECT (asrc, "Got enough data: %lu bytes (wanted at least %u)",
dwBufferSize, length);
/* Lock the buffer and read only the first @length bytes. Keep the rest in
* the capture buffer for the next read. */
hRes = IDirectSoundCaptureBuffer_Lock (dsoundsrc->pDSBSecondary,
dsoundsrc->current_circular_offset,
length,
&pLockedBuffer1, &dwSizeBuffer1, &pLockedBuffer2, &dwSizeBuffer2, 0L);
/* NOTE: We now assume that dwSizeBuffer1 + dwSizeBuffer2 == length since the
* API is supposed to guarantee that */
/* Copy buffer data to another buffer */
if (hRes == DS_OK) {
memcpy (data, pLockedBuffer1, dwSizeBuffer1);
}
/* ...and if something is in another buffer */
if (pLockedBuffer2 != NULL) {
memcpy (((guchar *) data + dwSizeBuffer1), pLockedBuffer2, dwSizeBuffer2);
}
dsoundsrc->current_circular_offset += dwSizeBuffer1 + dwSizeBuffer2;
dsoundsrc->current_circular_offset %= dsoundsrc->buffer_size;
IDirectSoundCaptureBuffer_Unlock (dsoundsrc->pDSBSecondary,
pLockedBuffer1, dwSizeBuffer1, pLockedBuffer2, dwSizeBuffer2);
GST_DSOUND_UNLOCK (dsoundsrc);
/* We always read exactly @length data */
return length;
}