802 lines
24 KiB
C++
802 lines
24 KiB
C++
//------------------------------------------------------------------------------
|
|
// File: OutputQ.cpp
|
|
//
|
|
// Desc: DirectShow base classes - implements COutputQueue class used by an
|
|
// output pin which may sometimes want to queue output samples on a
|
|
// separate thread and sometimes call Receive() directly on the input
|
|
// pin.
|
|
//
|
|
// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
|
|
//------------------------------------------------------------------------------
|
|
|
|
|
|
#include <streams.h>
|
|
|
|
|
|
//
|
|
// COutputQueue Constructor :
|
|
//
|
|
// Determines if a thread is to be created and creates resources
|
|
//
|
|
// pInputPin - the downstream input pin we're queueing samples to
|
|
//
|
|
// phr - changed to a failure code if this function fails
|
|
// (otherwise unchanges)
|
|
//
|
|
// bAuto - Ask pInputPin if it can block in Receive by calling
|
|
// its ReceiveCanBlock method and create a thread if
|
|
// it can block, otherwise not.
|
|
//
|
|
// bQueue - if bAuto == FALSE then we create a thread if and only
|
|
// if bQueue == TRUE
|
|
//
|
|
// lBatchSize - work in batches of lBatchSize
|
|
//
|
|
// bBatchEact - Use exact batch sizes so don't send until the
|
|
// batch is full or SendAnyway() is called
|
|
//
|
|
// lListSize - If we create a thread make the list of samples queued
|
|
// to the thread have this size cache
|
|
//
|
|
// dwPriority - If we create a thread set its priority to this
|
|
//
|
|
COutputQueue::COutputQueue(
|
|
IPin *pInputPin, // Pin to send stuff to
|
|
__inout HRESULT *phr, // 'Return code'
|
|
BOOL bAuto, // Ask pin if queue or not
|
|
BOOL bQueue, // Send through queue
|
|
LONG lBatchSize, // Batch
|
|
BOOL bBatchExact, // Batch exactly to BatchSize
|
|
LONG lListSize,
|
|
DWORD dwPriority,
|
|
bool bFlushingOpt // flushing optimization
|
|
) : m_lBatchSize(lBatchSize),
|
|
m_bBatchExact(bBatchExact && (lBatchSize > 1)),
|
|
m_hThread(NULL),
|
|
m_hSem(NULL),
|
|
m_List(NULL),
|
|
m_pPin(pInputPin),
|
|
m_ppSamples(NULL),
|
|
m_lWaiting(0),
|
|
m_evFlushComplete(FALSE, phr),
|
|
m_pInputPin(NULL),
|
|
m_bSendAnyway(FALSE),
|
|
m_nBatched(0),
|
|
m_bFlushing(FALSE),
|
|
m_bFlushed(TRUE),
|
|
m_bFlushingOpt(bFlushingOpt),
|
|
m_bTerminate(FALSE),
|
|
m_hEventPop(NULL),
|
|
m_hr(S_OK)
|
|
{
|
|
ASSERT(m_lBatchSize > 0);
|
|
|
|
|
|
if (FAILED(*phr)) {
|
|
return;
|
|
}
|
|
|
|
// Check the input pin is OK and cache its IMemInputPin interface
|
|
|
|
*phr = pInputPin->QueryInterface(IID_IMemInputPin, (void **)&m_pInputPin);
|
|
if (FAILED(*phr)) {
|
|
return;
|
|
}
|
|
|
|
// See if we should ask the downstream pin
|
|
|
|
if (bAuto) {
|
|
HRESULT hr = m_pInputPin->ReceiveCanBlock();
|
|
if (SUCCEEDED(hr)) {
|
|
bQueue = hr == S_OK;
|
|
}
|
|
}
|
|
|
|
// Create our sample batch
|
|
|
|
m_ppSamples = new PMEDIASAMPLE[m_lBatchSize];
|
|
if (m_ppSamples == NULL) {
|
|
*phr = E_OUTOFMEMORY;
|
|
return;
|
|
}
|
|
|
|
// If we're queueing allocate resources
|
|
|
|
if (bQueue) {
|
|
DbgLog((LOG_TRACE, 2, TEXT("Creating thread for output pin")));
|
|
m_hSem = CreateSemaphore(NULL, 0, 0x7FFFFFFF, NULL);
|
|
if (m_hSem == NULL) {
|
|
DWORD dwError = GetLastError();
|
|
*phr = AmHresultFromWin32(dwError);
|
|
return;
|
|
}
|
|
m_List = new CSampleList(NAME("Sample Queue List"),
|
|
lListSize,
|
|
FALSE // No lock
|
|
);
|
|
if (m_List == NULL) {
|
|
*phr = E_OUTOFMEMORY;
|
|
return;
|
|
}
|
|
|
|
|
|
DWORD dwThreadId;
|
|
m_hThread = CreateThread(NULL,
|
|
0,
|
|
InitialThreadProc,
|
|
(LPVOID)this,
|
|
0,
|
|
&dwThreadId);
|
|
if (m_hThread == NULL) {
|
|
DWORD dwError = GetLastError();
|
|
*phr = AmHresultFromWin32(dwError);
|
|
return;
|
|
}
|
|
SetThreadPriority(m_hThread, dwPriority);
|
|
} else {
|
|
DbgLog((LOG_TRACE, 2, TEXT("Calling input pin directly - no thread")));
|
|
}
|
|
}
|
|
|
|
//
|
|
// COutputQueuee Destructor :
|
|
//
|
|
// Free all resources -
|
|
//
|
|
// Thread,
|
|
// Batched samples
|
|
//
|
|
COutputQueue::~COutputQueue()
|
|
{
|
|
DbgLog((LOG_TRACE, 3, TEXT("COutputQueue::~COutputQueue")));
|
|
/* Free our pointer */
|
|
if (m_pInputPin != NULL) {
|
|
m_pInputPin->Release();
|
|
}
|
|
if (m_hThread != NULL) {
|
|
{
|
|
CAutoLock lck(this);
|
|
m_bTerminate = TRUE;
|
|
m_hr = S_FALSE;
|
|
NotifyThread();
|
|
}
|
|
DbgWaitForSingleObject(m_hThread);
|
|
EXECUTE_ASSERT(CloseHandle(m_hThread));
|
|
|
|
// The thread frees the samples when asked to terminate
|
|
|
|
ASSERT(m_List->GetCount() == 0);
|
|
delete m_List;
|
|
} else {
|
|
FreeSamples();
|
|
}
|
|
if (m_hSem != NULL) {
|
|
EXECUTE_ASSERT(CloseHandle(m_hSem));
|
|
}
|
|
delete [] m_ppSamples;
|
|
}
|
|
|
|
//
|
|
// Call the real thread proc as a member function
|
|
//
|
|
DWORD WINAPI COutputQueue::InitialThreadProc(__in LPVOID pv)
|
|
{
|
|
HRESULT hrCoInit = CAMThread::CoInitializeHelper();
|
|
|
|
COutputQueue *pSampleQueue = (COutputQueue *)pv;
|
|
DWORD dwReturn = pSampleQueue->ThreadProc();
|
|
|
|
if(hrCoInit == S_OK) {
|
|
CoUninitialize();
|
|
}
|
|
|
|
return dwReturn;
|
|
}
|
|
|
|
//
|
|
// Thread sending the samples downstream :
|
|
//
|
|
// When there is nothing to do the thread sets m_lWaiting (while
|
|
// holding the critical section) and then waits for m_hSem to be
|
|
// set (not holding the critical section)
|
|
//
|
|
DWORD COutputQueue::ThreadProc()
|
|
{
|
|
while (TRUE) {
|
|
BOOL bWait = FALSE;
|
|
IMediaSample *pSample;
|
|
LONG lNumberToSend; // Local copy
|
|
NewSegmentPacket* ppacket;
|
|
|
|
//
|
|
// Get a batch of samples and send it if possible
|
|
// In any case exit the loop if there is a control action
|
|
// requested
|
|
//
|
|
{
|
|
CAutoLock lck(this);
|
|
while (TRUE) {
|
|
|
|
if (m_bTerminate) {
|
|
FreeSamples();
|
|
return 0;
|
|
}
|
|
if (m_bFlushing) {
|
|
FreeSamples();
|
|
SetEvent(m_evFlushComplete);
|
|
}
|
|
|
|
// Get a sample off the list
|
|
|
|
pSample = m_List->RemoveHead();
|
|
// inform derived class we took something off the queue
|
|
if (m_hEventPop) {
|
|
//DbgLog((LOG_TRACE,3,TEXT("Queue: Delivered SET EVENT")));
|
|
SetEvent(m_hEventPop);
|
|
}
|
|
|
|
if (pSample != NULL &&
|
|
!IsSpecialSample(pSample)) {
|
|
|
|
// If its just a regular sample just add it to the batch
|
|
// and exit the loop if the batch is full
|
|
|
|
m_ppSamples[m_nBatched++] = pSample;
|
|
if (m_nBatched == m_lBatchSize) {
|
|
break;
|
|
}
|
|
} else {
|
|
|
|
// If there was nothing in the queue and there's nothing
|
|
// to send (either because there's nothing or the batch
|
|
// isn't full) then prepare to wait
|
|
|
|
if (pSample == NULL &&
|
|
(m_bBatchExact || m_nBatched == 0)) {
|
|
|
|
// Tell other thread to set the event when there's
|
|
// something do to
|
|
|
|
ASSERT(m_lWaiting == 0);
|
|
m_lWaiting++;
|
|
bWait = TRUE;
|
|
} else {
|
|
|
|
// We break out of the loop on SEND_PACKET unless
|
|
// there's nothing to send
|
|
|
|
if (pSample == SEND_PACKET && m_nBatched == 0) {
|
|
continue;
|
|
}
|
|
|
|
if (pSample == NEW_SEGMENT) {
|
|
// now we need the parameters - we are
|
|
// guaranteed that the next packet contains them
|
|
ppacket = (NewSegmentPacket *) m_List->RemoveHead();
|
|
// we took something off the queue
|
|
if (m_hEventPop) {
|
|
//DbgLog((LOG_TRACE,3,TEXT("Queue: Delivered SET EVENT")));
|
|
SetEvent(m_hEventPop);
|
|
}
|
|
|
|
ASSERT(ppacket);
|
|
}
|
|
// EOS_PACKET falls through here and we exit the loop
|
|
// In this way it acts like SEND_PACKET
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (!bWait) {
|
|
// We look at m_nBatched from the client side so keep
|
|
// it up to date inside the critical section
|
|
lNumberToSend = m_nBatched; // Local copy
|
|
m_nBatched = 0;
|
|
}
|
|
}
|
|
|
|
// Wait for some more data
|
|
|
|
if (bWait) {
|
|
DbgWaitForSingleObject(m_hSem);
|
|
continue;
|
|
}
|
|
|
|
|
|
|
|
// OK - send it if there's anything to send
|
|
// We DON'T check m_bBatchExact here because either we've got
|
|
// a full batch or we dropped through because we got
|
|
// SEND_PACKET or EOS_PACKET - both of which imply we should
|
|
// flush our batch
|
|
|
|
if (lNumberToSend != 0) {
|
|
long nProcessed;
|
|
if (m_hr == S_OK) {
|
|
ASSERT(!m_bFlushed);
|
|
HRESULT hr = m_pInputPin->ReceiveMultiple(m_ppSamples,
|
|
lNumberToSend,
|
|
&nProcessed);
|
|
/* Don't overwrite a flushing state HRESULT */
|
|
CAutoLock lck(this);
|
|
if (m_hr == S_OK) {
|
|
m_hr = hr;
|
|
}
|
|
ASSERT(!m_bFlushed);
|
|
}
|
|
while (lNumberToSend != 0) {
|
|
m_ppSamples[--lNumberToSend]->Release();
|
|
}
|
|
if (m_hr != S_OK) {
|
|
|
|
// In any case wait for more data - S_OK just
|
|
// means there wasn't an error
|
|
|
|
DbgLog((LOG_ERROR, 2, TEXT("ReceiveMultiple returned %8.8X"),
|
|
m_hr));
|
|
}
|
|
}
|
|
|
|
// Check for end of stream
|
|
|
|
if (pSample == EOS_PACKET) {
|
|
|
|
// We don't send even end of stream on if we've previously
|
|
// returned something other than S_OK
|
|
// This is because in that case the pin which returned
|
|
// something other than S_OK should have either sent
|
|
// EndOfStream() or notified the filter graph
|
|
|
|
if (m_hr == S_OK) {
|
|
DbgLog((LOG_TRACE, 2, TEXT("COutputQueue sending EndOfStream()")));
|
|
HRESULT hr = m_pPin->EndOfStream();
|
|
if (FAILED(hr)) {
|
|
DbgLog((LOG_ERROR, 2, TEXT("COutputQueue got code 0x%8.8X from EndOfStream()")));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Data from a new source
|
|
|
|
if (pSample == RESET_PACKET) {
|
|
m_hr = S_OK;
|
|
SetEvent(m_evFlushComplete);
|
|
}
|
|
|
|
if (pSample == NEW_SEGMENT) {
|
|
m_pPin->NewSegment(ppacket->tStart, ppacket->tStop, ppacket->dRate);
|
|
delete ppacket;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Send batched stuff anyway
|
|
void COutputQueue::SendAnyway()
|
|
{
|
|
if (!IsQueued()) {
|
|
|
|
// m_bSendAnyway is a private parameter checked in ReceiveMultiple
|
|
|
|
m_bSendAnyway = TRUE;
|
|
LONG nProcessed;
|
|
ReceiveMultiple(NULL, 0, &nProcessed);
|
|
m_bSendAnyway = FALSE;
|
|
|
|
} else {
|
|
CAutoLock lck(this);
|
|
QueueSample(SEND_PACKET);
|
|
NotifyThread();
|
|
}
|
|
}
|
|
|
|
void
|
|
COutputQueue::NewSegment(
|
|
REFERENCE_TIME tStart,
|
|
REFERENCE_TIME tStop,
|
|
double dRate)
|
|
{
|
|
if (!IsQueued()) {
|
|
if (S_OK == m_hr) {
|
|
if (m_bBatchExact) {
|
|
SendAnyway();
|
|
}
|
|
m_pPin->NewSegment(tStart, tStop, dRate);
|
|
}
|
|
} else {
|
|
if (m_hr == S_OK) {
|
|
//
|
|
// we need to queue the new segment to appear in order in the
|
|
// data, but we need to pass parameters to it. Rather than
|
|
// take the hit of wrapping every single sample so we can tell
|
|
// special ones apart, we queue special pointers to indicate
|
|
// special packets, and we guarantee (by holding the
|
|
// critical section) that the packet immediately following a
|
|
// NEW_SEGMENT value is a NewSegmentPacket containing the
|
|
// parameters.
|
|
NewSegmentPacket * ppack = new NewSegmentPacket;
|
|
if (ppack == NULL) {
|
|
return;
|
|
}
|
|
ppack->tStart = tStart;
|
|
ppack->tStop = tStop;
|
|
ppack->dRate = dRate;
|
|
|
|
CAutoLock lck(this);
|
|
QueueSample(NEW_SEGMENT);
|
|
QueueSample( (IMediaSample*) ppack);
|
|
NotifyThread();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// End of Stream is queued to output device
|
|
//
|
|
void COutputQueue::EOS()
|
|
{
|
|
CAutoLock lck(this);
|
|
if (!IsQueued()) {
|
|
if (m_bBatchExact) {
|
|
SendAnyway();
|
|
}
|
|
if (m_hr == S_OK) {
|
|
DbgLog((LOG_TRACE, 2, TEXT("COutputQueue sending EndOfStream()")));
|
|
m_bFlushed = FALSE;
|
|
HRESULT hr = m_pPin->EndOfStream();
|
|
if (FAILED(hr)) {
|
|
DbgLog((LOG_ERROR, 2, TEXT("COutputQueue got code 0x%8.8X from EndOfStream()")));
|
|
}
|
|
}
|
|
} else {
|
|
if (m_hr == S_OK) {
|
|
m_bFlushed = FALSE;
|
|
QueueSample(EOS_PACKET);
|
|
NotifyThread();
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Flush all the samples in the queue
|
|
//
|
|
void COutputQueue::BeginFlush()
|
|
{
|
|
if (IsQueued()) {
|
|
{
|
|
CAutoLock lck(this);
|
|
|
|
// block receives -- we assume this is done by the
|
|
// filter in which we are a component
|
|
|
|
// discard all queued data
|
|
|
|
m_bFlushing = TRUE;
|
|
|
|
// Make sure we discard all samples from now on
|
|
|
|
if (m_hr == S_OK) {
|
|
m_hr = S_FALSE;
|
|
}
|
|
|
|
// Optimize so we don't keep calling downstream all the time
|
|
|
|
if (m_bFlushed && m_bFlushingOpt) {
|
|
return;
|
|
}
|
|
|
|
// Make sure we really wait for the flush to complete
|
|
m_evFlushComplete.Reset();
|
|
|
|
NotifyThread();
|
|
}
|
|
|
|
// pass this downstream
|
|
|
|
m_pPin->BeginFlush();
|
|
} else {
|
|
// pass downstream first to avoid deadlocks
|
|
m_pPin->BeginFlush();
|
|
CAutoLock lck(this);
|
|
// discard all queued data
|
|
|
|
m_bFlushing = TRUE;
|
|
|
|
// Make sure we discard all samples from now on
|
|
|
|
if (m_hr == S_OK) {
|
|
m_hr = S_FALSE;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
//
|
|
// leave flush mode - pass this downstream
|
|
void COutputQueue::EndFlush()
|
|
{
|
|
{
|
|
CAutoLock lck(this);
|
|
ASSERT(m_bFlushing);
|
|
if (m_bFlushingOpt && m_bFlushed && IsQueued()) {
|
|
m_bFlushing = FALSE;
|
|
m_hr = S_OK;
|
|
return;
|
|
}
|
|
}
|
|
|
|
// sync with pushing thread -- done in BeginFlush
|
|
// ensure no more data to go downstream -- done in BeginFlush
|
|
//
|
|
// Because we are synching here there is no need to hold the critical
|
|
// section (in fact we'd deadlock if we did!)
|
|
|
|
if (IsQueued()) {
|
|
m_evFlushComplete.Wait();
|
|
} else {
|
|
FreeSamples();
|
|
}
|
|
|
|
// Be daring - the caller has guaranteed no samples will arrive
|
|
// before EndFlush() returns
|
|
|
|
m_bFlushing = FALSE;
|
|
m_bFlushed = TRUE;
|
|
|
|
// call EndFlush on downstream pins
|
|
|
|
m_pPin->EndFlush();
|
|
|
|
m_hr = S_OK;
|
|
}
|
|
|
|
// COutputQueue::QueueSample
|
|
//
|
|
// private method to Send a sample to the output queue
|
|
// The critical section MUST be held when this is called
|
|
|
|
void COutputQueue::QueueSample(IMediaSample *pSample)
|
|
{
|
|
if (NULL == m_List->AddTail(pSample)) {
|
|
if (!IsSpecialSample(pSample)) {
|
|
pSample->Release();
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// COutputQueue::Receive()
|
|
//
|
|
// Send a single sample by the multiple sample route
|
|
// (NOTE - this could be optimized if necessary)
|
|
//
|
|
// On return the sample will have been Release()'d
|
|
//
|
|
|
|
HRESULT COutputQueue::Receive(IMediaSample *pSample)
|
|
{
|
|
LONG nProcessed;
|
|
return ReceiveMultiple(&pSample, 1, &nProcessed);
|
|
}
|
|
|
|
//
|
|
// COutputQueue::ReceiveMultiple()
|
|
//
|
|
// Send a set of samples to the downstream pin
|
|
//
|
|
// ppSamples - array of samples
|
|
// nSamples - how many
|
|
// nSamplesProcessed - How many were processed
|
|
//
|
|
// On return all samples will have been Release()'d
|
|
//
|
|
|
|
HRESULT COutputQueue::ReceiveMultiple (
|
|
__in_ecount(nSamples) IMediaSample **ppSamples,
|
|
long nSamples,
|
|
__out long *nSamplesProcessed)
|
|
{
|
|
if (nSamples < 0) {
|
|
return E_INVALIDARG;
|
|
}
|
|
|
|
CAutoLock lck(this);
|
|
// Either call directly or queue up the samples
|
|
|
|
if (!IsQueued()) {
|
|
|
|
// If we already had a bad return code then just return
|
|
|
|
if (S_OK != m_hr) {
|
|
|
|
// If we've never received anything since the last Flush()
|
|
// and the sticky return code is not S_OK we must be
|
|
// flushing
|
|
// ((!A || B) is equivalent to A implies B)
|
|
ASSERT(!m_bFlushed || m_bFlushing);
|
|
|
|
// We're supposed to Release() them anyway!
|
|
*nSamplesProcessed = 0;
|
|
for (int i = 0; i < nSamples; i++) {
|
|
DbgLog((LOG_TRACE, 3, TEXT("COutputQueue (direct) : Discarding %d samples code 0x%8.8X"),
|
|
nSamples, m_hr));
|
|
ppSamples[i]->Release();
|
|
}
|
|
|
|
return m_hr;
|
|
}
|
|
//
|
|
// If we're flushing the sticky return code should be S_FALSE
|
|
//
|
|
ASSERT(!m_bFlushing);
|
|
m_bFlushed = FALSE;
|
|
|
|
ASSERT(m_nBatched < m_lBatchSize);
|
|
ASSERT(m_nBatched == 0 || m_bBatchExact);
|
|
|
|
// Loop processing the samples in batches
|
|
|
|
LONG iLost = 0;
|
|
long iDone = 0;
|
|
for (iDone = 0;
|
|
iDone < nSamples || (m_nBatched != 0 && m_bSendAnyway);
|
|
) {
|
|
|
|
//pragma message (REMIND("Implement threshold scheme"))
|
|
ASSERT(m_nBatched < m_lBatchSize);
|
|
if (iDone < nSamples) {
|
|
m_ppSamples[m_nBatched++] = ppSamples[iDone++];
|
|
}
|
|
if (m_nBatched == m_lBatchSize ||
|
|
nSamples == 0 && (m_bSendAnyway || !m_bBatchExact)) {
|
|
LONG nDone;
|
|
DbgLog((LOG_TRACE, 4, TEXT("Batching %d samples"),
|
|
m_nBatched));
|
|
|
|
if (m_hr == S_OK) {
|
|
m_hr = m_pInputPin->ReceiveMultiple(m_ppSamples,
|
|
m_nBatched,
|
|
&nDone);
|
|
} else {
|
|
nDone = 0;
|
|
}
|
|
iLost += m_nBatched - nDone;
|
|
for (LONG i = 0; i < m_nBatched; i++) {
|
|
m_ppSamples[i]->Release();
|
|
}
|
|
m_nBatched = 0;
|
|
}
|
|
}
|
|
*nSamplesProcessed = iDone - iLost;
|
|
if (*nSamplesProcessed < 0) {
|
|
*nSamplesProcessed = 0;
|
|
}
|
|
return m_hr;
|
|
} else {
|
|
/* We're sending to our thread */
|
|
|
|
if (m_hr != S_OK) {
|
|
*nSamplesProcessed = 0;
|
|
DbgLog((LOG_TRACE, 3, TEXT("COutputQueue (queued) : Discarding %d samples code 0x%8.8X"),
|
|
nSamples, m_hr));
|
|
for (int i = 0; i < nSamples; i++) {
|
|
ppSamples[i]->Release();
|
|
}
|
|
return m_hr;
|
|
}
|
|
m_bFlushed = FALSE;
|
|
for (long i = 0; i < nSamples; i++) {
|
|
QueueSample(ppSamples[i]);
|
|
}
|
|
*nSamplesProcessed = nSamples;
|
|
if (!m_bBatchExact ||
|
|
m_nBatched + m_List->GetCount() >= m_lBatchSize) {
|
|
NotifyThread();
|
|
}
|
|
return S_OK;
|
|
}
|
|
}
|
|
|
|
// Get ready for new data - cancels sticky m_hr
|
|
void COutputQueue::Reset()
|
|
{
|
|
if (!IsQueued()) {
|
|
m_hr = S_OK;
|
|
} else {
|
|
{
|
|
CAutoLock lck(this);
|
|
QueueSample(RESET_PACKET);
|
|
NotifyThread();
|
|
}
|
|
m_evFlushComplete.Wait();
|
|
}
|
|
}
|
|
|
|
// Remove and Release() all queued and Batched samples
|
|
void COutputQueue::FreeSamples()
|
|
{
|
|
CAutoLock lck(this);
|
|
if (IsQueued()) {
|
|
while (TRUE) {
|
|
IMediaSample *pSample = m_List->RemoveHead();
|
|
// inform derived class we took something off the queue
|
|
if (m_hEventPop) {
|
|
//DbgLog((LOG_TRACE,3,TEXT("Queue: Delivered SET EVENT")));
|
|
SetEvent(m_hEventPop);
|
|
}
|
|
|
|
if (pSample == NULL) {
|
|
break;
|
|
}
|
|
if (!IsSpecialSample(pSample)) {
|
|
pSample->Release();
|
|
} else {
|
|
if (pSample == NEW_SEGMENT) {
|
|
// Free NEW_SEGMENT packet
|
|
NewSegmentPacket *ppacket =
|
|
(NewSegmentPacket *) m_List->RemoveHead();
|
|
// inform derived class we took something off the queue
|
|
if (m_hEventPop) {
|
|
//DbgLog((LOG_TRACE,3,TEXT("Queue: Delivered SET EVENT")));
|
|
SetEvent(m_hEventPop);
|
|
}
|
|
|
|
ASSERT(ppacket != NULL);
|
|
delete ppacket;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (int i = 0; i < m_nBatched; i++) {
|
|
m_ppSamples[i]->Release();
|
|
}
|
|
m_nBatched = 0;
|
|
}
|
|
|
|
// Notify the thread if there is something to do
|
|
//
|
|
// The critical section MUST be held when this is called
|
|
void COutputQueue::NotifyThread()
|
|
{
|
|
// Optimize - no need to signal if it's not waiting
|
|
ASSERT(IsQueued());
|
|
if (m_lWaiting) {
|
|
ReleaseSemaphore(m_hSem, m_lWaiting, NULL);
|
|
m_lWaiting = 0;
|
|
}
|
|
}
|
|
|
|
// See if there's any work to do
|
|
// Returns
|
|
// TRUE if there is nothing on the queue and nothing in the batch
|
|
// and all data has been sent
|
|
// FALSE otherwise
|
|
//
|
|
BOOL COutputQueue::IsIdle()
|
|
{
|
|
CAutoLock lck(this);
|
|
|
|
// We're idle if
|
|
// there is no thread (!IsQueued()) OR
|
|
// the thread is waiting for more work (m_lWaiting != 0)
|
|
// AND
|
|
// there's nothing in the current batch (m_nBatched == 0)
|
|
|
|
if (IsQueued() && m_lWaiting == 0 || m_nBatched != 0) {
|
|
return FALSE;
|
|
} else {
|
|
|
|
// If we're idle it shouldn't be possible for there
|
|
// to be anything on the work queue
|
|
|
|
ASSERT(!IsQueued() || m_List->GetCount() == 0);
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
|
|
void COutputQueue::SetPopEvent(HANDLE hEvent)
|
|
{
|
|
m_hEventPop = hEvent;
|
|
}
|