752 lines
20 KiB
C++
752 lines
20 KiB
C++
// Copyright (c) 1997 - 1998 Microsoft Corporation. All Rights Reserved.
|
|
// Stream.cpp : Implementation of CStream
|
|
#include "stdafx.h"
|
|
#include "project.h"
|
|
|
|
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// CStream
|
|
|
|
CStream::CStream() :
|
|
m_bCommitted(false),
|
|
m_lRequestedBufferCount(0),
|
|
m_bFlushing(false),
|
|
m_rtWaiting(0),
|
|
m_lWaiting(0),
|
|
m_hWaitFreeSem(NULL),
|
|
m_pFirstFree(NULL),
|
|
m_pLastFree(NULL),
|
|
m_cAllocated(0),
|
|
m_bEndOfStream(false),
|
|
m_FilterState(State_Stopped),
|
|
m_pFilter(NULL),
|
|
m_pFilterGraph(NULL),
|
|
m_pMMStream(NULL),
|
|
m_pWritePump(NULL),
|
|
m_rtSegmentStart(0),
|
|
m_bNoStall(false),
|
|
m_bStopIfNoSamples(false)
|
|
{
|
|
InitMediaType(&m_ConnectedMediaType);
|
|
InitMediaType(&m_ActualMediaType);
|
|
CHECKSAMPLELIST
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
bool CStream::CheckSampleList()
|
|
{
|
|
if (m_pFirstFree) {
|
|
CSample *pSample = m_pFirstFree;
|
|
if (pSample->m_pPrevFree != NULL) {
|
|
return false;
|
|
}
|
|
while (pSample->m_pNextFree) {
|
|
if (pSample->m_pNextFree->m_pPrevFree != pSample) {
|
|
return false;
|
|
}
|
|
pSample = pSample->m_pNextFree;
|
|
}
|
|
if (pSample != m_pLastFree) {
|
|
return false;
|
|
}
|
|
} else {
|
|
if (m_pLastFree) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
HRESULT CStream::FinalConstruct(void)
|
|
{
|
|
m_hWaitFreeSem = CreateSemaphore(NULL, 0, 0x7FFFFFF, NULL);
|
|
return m_hWaitFreeSem ? S_OK : E_OUTOFMEMORY;
|
|
}
|
|
|
|
|
|
CStream::~CStream()
|
|
{
|
|
SetState(State_Stopped); // Make sure we're decommitted and pump is dead
|
|
Disconnect(); // Free any allocated media types and release held references
|
|
if (m_hWaitFreeSem) {
|
|
CloseHandle(m_hWaitFreeSem);
|
|
}
|
|
}
|
|
|
|
STDMETHODIMP CStream::GetMultiMediaStream(IMultiMediaStream **ppMultiMediaStream)
|
|
{
|
|
TRACEINTERFACE(_T("IMediaStream::GetMultiMediaStream(0x%8.8X)\n"),
|
|
ppMultiMediaStream);
|
|
if (NULL == ppMultiMediaStream) {
|
|
return E_POINTER;
|
|
}
|
|
|
|
if (m_pMMStream != NULL) {
|
|
m_pMMStream->AddRef();
|
|
}
|
|
|
|
*ppMultiMediaStream = m_pMMStream;
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::GetInformation(MSPID *pPurposeId, STREAM_TYPE *pType)
|
|
{
|
|
TRACEINTERFACE(_T("IMediaStream::GetInformation(0x%8.8X, 0x%8.8X)\n"),
|
|
pPurposeId, pType);
|
|
if (pPurposeId) {
|
|
*pPurposeId = m_PurposeId;
|
|
}
|
|
if (pType) {
|
|
*pType = m_StreamType;
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::SendEndOfStream(DWORD dwFlags)
|
|
{
|
|
TRACEINTERFACE(_T("IMediaStream::SendEndOfStream(0x%8.8X)\n"),
|
|
dwFlags);
|
|
if (m_StreamType != STREAMTYPE_WRITE) {
|
|
return MS_E_INVALIDSTREAMTYPE;
|
|
}
|
|
if (m_pConnectedPin) {
|
|
return m_pConnectedPin->EndOfStream();
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::Initialize(IUnknown *pSourceObject, DWORD dwFlags,
|
|
REFMSPID PurposeId, const STREAM_TYPE StreamType)
|
|
{
|
|
TRACEINTERFACE(_T("IMediaStream::Initalize(0x%8.8X, 0x%8.8X, %s, %d)\n"),
|
|
pSourceObject, dwFlags, TextFromPurposeId(PurposeId), StreamType);
|
|
HRESULT hr = NOERROR;
|
|
|
|
if (dwFlags & ~(AMMSF_CREATEPEER | AMMSF_STOPIFNOSAMPLES)) {
|
|
return E_INVALIDARG;
|
|
}
|
|
m_PurposeId = PurposeId;
|
|
m_StreamType = StreamType;
|
|
m_Direction = (StreamType == STREAMTYPE_WRITE) ? PINDIR_OUTPUT : PINDIR_INPUT;
|
|
if (dwFlags & AMMSF_CREATEPEER) {
|
|
if (!pSourceObject) {
|
|
hr = E_INVALIDARG;
|
|
} else {
|
|
CComQIPtr<IMediaStream, &IID_IMediaStream> pMediaStream(pSourceObject);
|
|
if (!pSourceObject) {
|
|
hr = E_INVALIDARG;
|
|
} else {
|
|
hr = SetSameFormat(pMediaStream, 0);
|
|
}
|
|
}
|
|
}
|
|
m_bStopIfNoSamples = dwFlags & AMMSF_STOPIFNOSAMPLES ? true : false;
|
|
return hr;
|
|
}
|
|
|
|
STDMETHODIMP CStream::SetState(FILTER_STATE State)
|
|
{
|
|
TRACEINTERFACE(_T("IMediaStream::SetState(%d)\n"),
|
|
State);
|
|
Lock();
|
|
if (m_pConnectedPin == NULL) {
|
|
Unlock();
|
|
if (State == STREAMSTATE_RUN) {
|
|
EndOfStream();
|
|
}
|
|
} else {
|
|
_ASSERTE(m_pAllocator != NULL);
|
|
FILTER_STATE prevState = m_FilterState;
|
|
m_FilterState = State;
|
|
if (State == State_Stopped) {
|
|
m_pAllocator->Decommit();
|
|
if (!m_bUsingMyAllocator) {
|
|
Decommit();
|
|
}
|
|
CPump *pPump = m_pWritePump;
|
|
m_pWritePump = NULL;
|
|
Unlock();
|
|
delete pPump;
|
|
} else {
|
|
m_pAllocator->Commit();
|
|
if (!m_bUsingMyAllocator) {
|
|
Commit();
|
|
}
|
|
if( State_Stopped == prevState )
|
|
{
|
|
// need this in the case of a seek while stopped, since BeginFlush
|
|
// may not be called to reset this flag
|
|
m_bEndOfStream = false;
|
|
}
|
|
Unlock();
|
|
}
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::JoinAMMultiMediaStream(IAMMultiMediaStream *pAMMultiMediaStream)
|
|
{
|
|
_ASSERTE(pAMMultiMediaStream == NULL || m_pMMStream == NULL);
|
|
AUTO_CRIT_LOCK;
|
|
HRESULT hr;
|
|
if (m_cAllocated) {
|
|
hr = MS_E_SAMPLEALLOC;
|
|
} else {
|
|
m_pMMStream = pAMMultiMediaStream;
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::JoinFilter(IMediaStreamFilter *pMediaStreamFilter)
|
|
{
|
|
_ASSERTE(pMediaStreamFilter == NULL || m_pFilter == NULL);
|
|
m_pFilter = pMediaStreamFilter;
|
|
pMediaStreamFilter->QueryInterface(IID_IBaseFilter, (void **)&m_pBaseFilter);
|
|
m_pBaseFilter->Release();
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::JoinFilterGraph(IFilterGraph *pFilterGraph)
|
|
{
|
|
_ASSERTE(pFilterGraph == NULL || m_pFilterGraph == NULL);
|
|
m_pFilterGraph = pFilterGraph;
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// IPin Implementation
|
|
//
|
|
|
|
STDMETHODIMP CStream::Disconnect()
|
|
{
|
|
m_pConnectedPin = NULL;
|
|
m_pConnectedMemInputPin.Release(); // Magically sets to NULL here
|
|
m_pQC.Release();
|
|
m_pAllocator = NULL;
|
|
m_lRequestedBufferCount = 0;
|
|
FreeMediaType(m_ConnectedMediaType);
|
|
FreeMediaType(m_ActualMediaType);
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::ConnectedTo(IPin **pPin)
|
|
{
|
|
*pPin = m_pConnectedPin;
|
|
if (*pPin) {
|
|
(*pPin)->AddRef();
|
|
return S_OK;
|
|
} else {
|
|
return VFW_E_NOT_CONNECTED;
|
|
}
|
|
}
|
|
|
|
STDMETHODIMP CStream::ConnectionMediaType(AM_MEDIA_TYPE *pmt)
|
|
{
|
|
if (m_pConnectedPin) {
|
|
CopyMediaType(pmt, &m_ConnectedMediaType);
|
|
return S_OK;
|
|
} else {
|
|
ZeroMemory(pmt, sizeof(*pmt));
|
|
pmt->lSampleSize = 1;
|
|
pmt->bFixedSizeSamples = TRUE;
|
|
return VFW_E_NOT_CONNECTED;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
void CStream::GetName(LPWSTR pszBuf)
|
|
{
|
|
if (m_PurposeId == GUID_NULL) {
|
|
pszBuf[0] = 0;
|
|
} else {
|
|
pszBuf[0] = (m_Direction == PINDIR_INPUT) ? (WCHAR)'I' : (WCHAR)'O';
|
|
WStringFromGUID(&m_PurposeId, &pszBuf[1]);
|
|
}
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::QueryPinInfo(PIN_INFO * pInfo)
|
|
{
|
|
pInfo->dir = m_Direction;
|
|
GetName(pInfo->achName);
|
|
return m_pFilter->QueryInterface(IID_IBaseFilter, (void **)&pInfo->pFilter);
|
|
}
|
|
|
|
STDMETHODIMP CStream::QueryDirection(PIN_DIRECTION * pPinDir)
|
|
{
|
|
*pPinDir = m_Direction;
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::QueryId(LPWSTR * Id)
|
|
{
|
|
*Id = (LPWSTR)CoTaskMemAlloc(128 * sizeof(WCHAR));
|
|
if (*Id) {
|
|
GetName(*Id);
|
|
return S_OK;
|
|
} else {
|
|
return E_OUTOFMEMORY;
|
|
}
|
|
}
|
|
|
|
|
|
//
|
|
// Derived classes must override this method
|
|
//
|
|
STDMETHODIMP CStream::QueryAccept(const AM_MEDIA_TYPE *pmt)
|
|
{
|
|
return E_NOTIMPL;
|
|
};
|
|
|
|
|
|
STDMETHODIMP CStream::QueryInternalConnections(IPin **apPin, ULONG *nPin)
|
|
{
|
|
//
|
|
// Returning E_NOTIMPL tells the filter graph manager that all input pins are connected to
|
|
// all output pins.
|
|
//
|
|
return E_NOTIMPL;
|
|
};
|
|
|
|
|
|
STDMETHODIMP CStream::EndOfStream(void)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
Lock();
|
|
if (m_bFlushing || m_bEndOfStream) {
|
|
hr = E_FAIL;
|
|
} else {
|
|
m_bEndOfStream = true;
|
|
CSample *pSample = m_pFirstFree;
|
|
m_pFirstFree = m_pLastFree = NULL; // Out of paranoia, clear these pointers first
|
|
while (pSample) {
|
|
CSample *pNext = pSample->m_pNextFree;
|
|
pSample->SetCompletionStatus(MS_S_ENDOFSTREAM); // WARNING! This sample may go away!!!
|
|
pSample = pNext;
|
|
}
|
|
CHECKSAMPLELIST
|
|
}
|
|
if (S_OK == hr) {
|
|
m_pFilter->EndOfStream();
|
|
}
|
|
Unlock();
|
|
|
|
return hr;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::BeginFlush(void)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
Lock();
|
|
const BOOL bCancelEOS = m_bEndOfStream;
|
|
if (m_bFlushing) {
|
|
hr = S_FALSE;
|
|
} else {
|
|
m_bFlushing = true;
|
|
m_bEndOfStream = false;
|
|
Decommit(); // Force everyone to unblock
|
|
}
|
|
if (S_OK == hr) {
|
|
m_pFilter->Flush(bCancelEOS);
|
|
}
|
|
Unlock();
|
|
|
|
return hr;
|
|
}
|
|
|
|
STDMETHODIMP CStream::EndFlush(void)
|
|
{
|
|
AUTO_CRIT_LOCK;
|
|
m_bFlushing = false;
|
|
_ASSERTE(!m_bEndOfStream);
|
|
Commit(); // Let getbuffer work again
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP CStream::NewSegment(REFERENCE_TIME tStart, REFERENCE_TIME tStop, double dRate)
|
|
{
|
|
Lock();
|
|
m_rtSegmentStart = tStart;
|
|
m_bEndOfStream = false;
|
|
Unlock();
|
|
return S_OK;
|
|
}
|
|
|
|
//
|
|
// IMemInputPin
|
|
//
|
|
STDMETHODIMP CStream::GetAllocator(IMemAllocator ** ppAllocator)
|
|
{
|
|
return GetControllingUnknown()->QueryInterface(IID_IMemAllocator, (void **)ppAllocator);
|
|
}
|
|
|
|
STDMETHODIMP CStream::NotifyAllocator(IMemAllocator * pAllocator, BOOL bReadOnly)
|
|
{
|
|
m_bUsingMyAllocator = IsSameObject(pAllocator, GetControllingUnknown());
|
|
m_bSamplesAreReadOnly = bReadOnly ? true : false;
|
|
HRESULT hr = S_OK;
|
|
if (!m_bUsingMyAllocator) {
|
|
// Transfer the properties across
|
|
ALLOCATOR_PROPERTIES Props;
|
|
hr = pAllocator->GetProperties(&Props);
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
ALLOCATOR_PROPERTIES PropsActual;
|
|
hr = SetProperties(&Props, &PropsActual);
|
|
}
|
|
m_pAllocator = pAllocator;
|
|
return hr;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::GetAllocatorRequirements(ALLOCATOR_PROPERTIES*pProps)
|
|
{
|
|
// Return E_NOTIMPL to indicate that we don't have any requirement and will not accept someone
|
|
// elses allocator.
|
|
return E_NOTIMPL;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::ReceiveMultiple(IMediaSample **pSamples, long nSamples, long *nSamplesProcessed)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
*nSamplesProcessed = 0;
|
|
while (nSamples-- > 0) {
|
|
hr = Receive(pSamples[*nSamplesProcessed]);
|
|
if (hr != S_OK) {
|
|
break;
|
|
}
|
|
(*nSamplesProcessed)++;
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
STDMETHODIMP CStream::ReceiveCanBlock()
|
|
{
|
|
return S_OK; // Pin can block if not using our allocator or using read-only samples
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// This method assumes the critical section is taken.
|
|
//
|
|
HRESULT CStream::ConnectThisMediaType(IPin *pReceivePin, const AM_MEDIA_TYPE *pmt)
|
|
{
|
|
HRESULT hr = pReceivePin->ReceiveConnection(this, pmt);
|
|
if (SUCCEEDED(hr)) {
|
|
m_pConnectedMemInputPin = pReceivePin; // Does a magic QI here!
|
|
if (!m_pConnectedMemInputPin) {
|
|
hr = VFW_E_TYPE_NOT_ACCEPTED;
|
|
} else {
|
|
hr = ReceiveConnection(pReceivePin, pmt);
|
|
if (SUCCEEDED(hr)) {
|
|
hr = m_pConnectedMemInputPin->NotifyAllocator(this, TRUE);
|
|
}
|
|
if (SUCCEEDED(hr)) {
|
|
CopyMediaType(&m_ConnectedMediaType, pmt);
|
|
}
|
|
if (SUCCEEDED(hr)) {
|
|
m_pAllocator = this;
|
|
m_bUsingMyAllocator = true;
|
|
} else {
|
|
Disconnect();
|
|
}
|
|
}
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
STDMETHODIMP CStream::Connect(IPin * pReceivePin, const AM_MEDIA_TYPE *pmt)
|
|
{
|
|
HRESULT hr;
|
|
AUTO_CRIT_LOCK;
|
|
|
|
if (pmt) {
|
|
hr = ConnectThisMediaType(pReceivePin, pmt);
|
|
} else {
|
|
AM_MEDIA_TYPE *pCurMediaType;
|
|
hr = GetMediaType(0, &pCurMediaType);
|
|
if (SUCCEEDED(hr)) {
|
|
hr = ConnectThisMediaType(pReceivePin, pCurMediaType);
|
|
DeleteMediaType(pCurMediaType);
|
|
}
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
|
|
|
|
STDMETHODIMP CStream::EnumMediaTypes(IEnumMediaTypes **ppEnum)
|
|
{
|
|
HRESULT hr = S_OK;
|
|
CMediaTypeEnum *pNewEnum = new CComObject<CMediaTypeEnum>;
|
|
if (pNewEnum == NULL) {
|
|
hr = E_OUTOFMEMORY;
|
|
} else {
|
|
pNewEnum->Initialize(this, 0);
|
|
}
|
|
pNewEnum->GetControllingUnknown()->QueryInterface(IID_IEnumMediaTypes, (void **)ppEnum);
|
|
return hr;
|
|
}
|
|
|
|
|
|
STDMETHODIMP CStream::Commit()
|
|
{
|
|
AUTO_CRIT_LOCK;
|
|
if (!m_bCommitted) {
|
|
if (m_StreamType == STREAMTYPE_WRITE) {
|
|
if (!m_pWritePump) {
|
|
HRESULT hr = CPump::CreatePump(this, &m_pWritePump);
|
|
if (hr != S_OK) {
|
|
return hr;
|
|
}
|
|
}
|
|
m_pWritePump->Run(true);
|
|
}
|
|
//
|
|
// Interesting thing to note here -- Even if we have not been initialized we will still
|
|
// work correctly on commit. We will simply set the requested buffer count to 1.
|
|
//
|
|
if (m_lRequestedBufferCount == 0) {
|
|
m_lRequestedBufferCount = 1;
|
|
}
|
|
m_bCommitted = true;
|
|
}
|
|
return S_OK;
|
|
}
|
|
|
|
|
|
|
|
STDMETHODIMP CStream::Decommit()
|
|
{
|
|
HRESULT hr = S_OK;
|
|
|
|
AUTO_CRIT_LOCK;
|
|
if (m_bCommitted) { // If we're already decommitted then just return S_OK.
|
|
m_bCommitted = false;
|
|
if (m_lWaiting > 0) {
|
|
ReleaseSemaphore(m_hWaitFreeSem, m_lWaiting, 0);
|
|
m_lWaiting = 0;
|
|
}
|
|
if (m_pWritePump) {
|
|
m_pWritePump->Run(false);
|
|
}
|
|
}
|
|
return hr;
|
|
}
|
|
|
|
|
|
//
|
|
// This method is not supported and never will be!
|
|
//
|
|
STDMETHODIMP CStream::ReleaseBuffer(IMediaSample *pBuffer)
|
|
{
|
|
return E_UNEXPECTED;
|
|
};
|
|
|
|
|
|
//
|
|
// The caller holds the reference to the sample after this point.
|
|
//
|
|
HRESULT CStream::AllocSampleFromPool(
|
|
const REFERENCE_TIME *pStartTime,
|
|
CSample **ppSample
|
|
)
|
|
{
|
|
CSample *pSample = NULL;
|
|
HRESULT hr = NOERROR;
|
|
bool bWaited = false;
|
|
bool bCreatedTemp = false;
|
|
|
|
do {
|
|
LONGLONG llLate = 0;
|
|
Lock();
|
|
// Check we are committed -- This can happen after we've blocked and then
|
|
// wake back up due to a decommit.
|
|
if (!m_bCommitted) {
|
|
hr = VFW_E_NOT_COMMITTED;
|
|
break;
|
|
}
|
|
if (pStartTime) {
|
|
REFERENCE_TIME CurTime;
|
|
if (m_pFilter->GetCurrentStreamTime(&CurTime) == S_OK) {
|
|
llLate = CurTime - *pStartTime;
|
|
|
|
/* Block if more than a millisecond early */
|
|
if (-llLate >= 10000) {
|
|
m_rtWaiting = *pStartTime;
|
|
Unlock();
|
|
m_pFilter->WaitUntil(*pStartTime);
|
|
Lock();
|
|
m_rtWaiting = 0;
|
|
if (!m_bCommitted) {
|
|
hr = VFW_E_NOT_COMMITTED;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
pSample = m_pFirstFree;
|
|
if (bWaited && pSample == NULL) {
|
|
_ASSERTE(m_bNoStall);
|
|
if (!m_bUsingMyAllocator) {
|
|
hr = HRESULT_FROM_WIN32(ERROR_SEM_TIMEOUT);
|
|
break;
|
|
} else {
|
|
// Try to make one
|
|
CreateTempSample(&pSample);
|
|
if (pSample) {
|
|
bCreatedTemp = true;
|
|
}
|
|
// pSample->SetCompletionStatus(MS_S_PENDING);
|
|
}
|
|
}
|
|
if (pSample == NULL) {
|
|
m_lWaiting++;
|
|
Unlock();
|
|
|
|
// Only wait for half a second if non-blocking
|
|
DWORD dwWait = INFINITE;
|
|
if (m_bNoStall) {
|
|
const LONGLONG llLateMs = llLate / 10000;
|
|
const DWORD dwMaxLateMs = 100;
|
|
if (llLateMs > dwMaxLateMs) {
|
|
dwWait = 0;
|
|
} else {
|
|
// llLateMs could be negative which means we waited
|
|
// just above
|
|
if (llLateMs > 0) {
|
|
dwWait = dwMaxLateMs - (DWORD)llLateMs;
|
|
} else {
|
|
dwWait = dwMaxLateMs;
|
|
}
|
|
}
|
|
}
|
|
bWaited = WAIT_TIMEOUT == WaitForSingleObject(
|
|
m_hWaitFreeSem,
|
|
dwWait) ?
|
|
true : false;
|
|
} else if (!bCreatedTemp) {
|
|
m_pFirstFree = pSample->m_pNextFree;
|
|
if (m_pFirstFree) {
|
|
m_pFirstFree->m_pPrevFree = NULL;
|
|
} else {
|
|
m_pLastFree = NULL;
|
|
}
|
|
pSample->m_pNextFree = NULL; // Just to be tidy. We know that m_pPrevFree is null!
|
|
_ASSERTE(pSample->m_Status == MS_S_PENDING);
|
|
CHECKSAMPLELIST
|
|
}
|
|
} while (pSample == NULL);
|
|
Unlock();
|
|
if (pSample) {
|
|
pSample->m_bWaited = pStartTime != 0 ? true : false;
|
|
}
|
|
*ppSample = pSample;
|
|
return hr;
|
|
}
|
|
|
|
|
|
void CStream::AddSampleToFreePool(CSample *pSample)
|
|
{
|
|
Lock();
|
|
_ASSERTE(pSample->m_pPrevFree == NULL && pSample->m_pNextFree == NULL);
|
|
if (m_pFirstFree) {
|
|
pSample->m_pPrevFree = m_pLastFree;
|
|
m_pLastFree->m_pNextFree = pSample;
|
|
} else {
|
|
pSample->m_pPrevFree = NULL;
|
|
m_pFirstFree = pSample;
|
|
}
|
|
pSample->m_pNextFree = NULL; // We know that the prev ptr is already null
|
|
m_pLastFree = pSample;
|
|
CHECKSAMPLELIST
|
|
if (m_lWaiting > 0) {
|
|
ReleaseSemaphore(m_hWaitFreeSem, 1, 0);
|
|
m_lWaiting--;
|
|
}
|
|
Unlock();
|
|
}
|
|
|
|
|
|
//
|
|
// The caller holds the reference to the sample after this point!
|
|
//
|
|
bool CStream::StealSampleFromFreePool(CSample *pSample, BOOL bAbort)
|
|
{
|
|
bool bWorked = false;
|
|
Lock();
|
|
if (m_pFirstFree) {
|
|
if (m_pFirstFree == pSample) {
|
|
// We'll only steal the first sample if there's nobody waiting for it right now.
|
|
bool bTakeFirstFree = true;
|
|
if (!bAbort && m_bCommitted) {
|
|
REFERENCE_TIME CurTime;
|
|
if (m_rtWaiting && m_pFilter->GetCurrentStreamTime(&CurTime) == S_OK) {
|
|
bTakeFirstFree = m_rtWaiting > CurTime;
|
|
}
|
|
}
|
|
if (bTakeFirstFree) {
|
|
m_pFirstFree = pSample->m_pNextFree;
|
|
if (m_pFirstFree) {
|
|
m_pFirstFree->m_pPrevFree = NULL;
|
|
} else {
|
|
m_pLastFree = NULL;
|
|
}
|
|
pSample->m_pNextFree = NULL; // We know the prev ptr is already null!
|
|
_ASSERTE(pSample->m_pPrevFree == NULL);
|
|
bWorked = true;
|
|
}
|
|
} else {
|
|
if (pSample->m_pPrevFree) {
|
|
pSample->m_pPrevFree->m_pNextFree = pSample->m_pNextFree;
|
|
if (pSample->m_pNextFree) {
|
|
pSample->m_pNextFree->m_pPrevFree = pSample->m_pPrevFree;
|
|
} else {
|
|
m_pLastFree = pSample->m_pPrevFree;
|
|
}
|
|
pSample->m_pNextFree = pSample->m_pPrevFree = NULL;
|
|
bWorked = true;
|
|
}
|
|
}
|
|
CHECKSAMPLELIST
|
|
}
|
|
Unlock();
|
|
return bWorked;
|
|
}
|
|
|
|
|
|
HRESULT CStream::CheckReceiveConnectionPin(IPin * pPin)
|
|
{
|
|
HRESULT hr;
|
|
if (!pPin) {
|
|
hr = E_POINTER;
|
|
} else {
|
|
if (m_pConnectedPin != NULL) {
|
|
hr = VFW_E_ALREADY_CONNECTED;
|
|
} else {
|
|
PIN_INFO pinfo;
|
|
hr = pPin->QueryPinInfo(&pinfo);
|
|
if (hr == NOERROR) {
|
|
pinfo.pFilter->Release();
|
|
if (pinfo.dir == m_Direction) {
|
|
hr = VFW_E_INVALID_DIRECTION;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return hr;
|
|
}
|