static const VSFrameRef *VS_CC getFrameFilter(int n, VSNodeRef *clip, VSFrameContext *ctxHandle) {
PFrameContext f(*(PFrameContext *)ctxHandle);
PVideoFrame g = f->availableFrames.value(NodeOutputKey(clip->clip.data(), n, clip->index));
if (g)
return new VSFrameRef(g);
else
return NULL;
}
static void VS_CC releaseFrameEarly(VSNodeRef *node, int n, VSFrameContext *frameCtx) {
PFrameContext f(*(PFrameContext *)frameCtx);
f->availableFrames.remove(NodeOutputKey(node->clip.data(), n, node->index));
}
void VSThreadPool::runTasks(VSThreadPool *owner, std::atomic<bool> &stop) {
#ifdef VS_TARGET_CPU_X86
if (!vs_isMMXStateOk())
vsFatal("Bad MMX state detected after creating new thread");
#endif
#ifdef VS_TARGET_OS_WINDOWS
if (!vs_isFPUStateOk())
vsWarning("Bad FPU state detected after creating new thread");
if (!vs_isSSEStateOk())
vsFatal("Bad SSE state detected after creating new thread");
#endif
std::unique_lock<std::mutex> lock(owner->lock);
while (true) {
bool ranTask = false;
/////////////////////////////////////////////////////////////////////////////////////////////
// Go through all tasks from the top (oldest) and process the first one possible
for (std::list<PFrameContext>::iterator iter = owner->tasks.begin(); iter != owner->tasks.end(); ++iter) {
FrameContext *mainContext = iter->get();
FrameContext *leafContext = nullptr;
/////////////////////////////////////////////////////////////////////////////////////////////
// Handle the output tasks
if (mainContext->frameDone && mainContext->returnedFrame) {
PFrameContext mainContextRef(*iter);
owner->tasks.erase(iter);
owner->returnFrame(mainContextRef, mainContext->returnedFrame);
ranTask = true;
break;
}
if (mainContext->frameDone && mainContext->hasError()) {
PFrameContext mainContextRef(*iter);
owner->tasks.erase(iter);
owner->returnFrame(mainContextRef, mainContext->getErrorMessage());
ranTask = true;
break;
}
bool hasLeafContext = mainContext->returnedFrame || mainContext->hasError();
if (hasLeafContext)
{
leafContext = mainContext;
mainContext = mainContext->upstreamContext.get();
}
VSNode *clip = mainContext->clip;
int filterMode = clip->filterMode;
/////////////////////////////////////////////////////////////////////////////////////////////
// This part handles the locking for the different filter modes
bool parallelRequestsNeedsUnlock = false;
if (filterMode == fmUnordered) {
// already busy?
if (!clip->serialMutex.try_lock())
continue;
} else if (filterMode == fmSerial) {
// already busy?
if (!clip->serialMutex.try_lock())
continue;
// no frame in progress?
if (clip->serialFrame == -1) {
clip->serialFrame = mainContext->n;
//
} else if (clip->serialFrame != mainContext->n) {
clip->serialMutex.unlock();
continue;
}
// continue processing the already started frame
} else if (filterMode == fmParallel) {
std::lock_guard<std::mutex> lock(clip->concurrentFramesMutex);
// is the filter already processing another call for this frame? if so move along
if (clip->concurrentFrames.count(mainContext->n)) {
continue;
} else {
clip->concurrentFrames.insert(mainContext->n);
}
} else if (filterMode == fmParallelRequests) {
std::lock_guard<std::mutex> lock(clip->concurrentFramesMutex);
// is the filter already processing another call for this frame? if so move along
if (clip->concurrentFrames.count(mainContext->n)) {
continue;
} else {
// do we need the serial lock since all frames will be ready this time?
// check if we're in the arAllFramesReady state so we need additional locking
if (mainContext->numFrameRequests == 1) {
if (!clip->serialMutex.try_lock())
continue;
parallelRequestsNeedsUnlock = true;
clip->concurrentFrames.insert(mainContext->n);
}
}
}
/////////////////////////////////////////////////////////////////////////////////////////////
// Remove the context from the task list
PFrameContext mainContextRef;
PFrameContext leafContextRef;
if (hasLeafContext) {
leafContextRef = *iter;
mainContextRef = leafContextRef->upstreamContext;
} else {
mainContextRef = *iter;
}
owner->tasks.erase(iter);
/////////////////////////////////////////////////////////////////////////////////////////////
// Figure out the activation reason
VSActivationReason ar = arInitial;
bool skipCall = false; // Used to avoid multiple error calls for the same frame request going into a filter
if ((hasLeafContext && leafContext->hasError()) || mainContext->hasError()) {
ar = arError;
skipCall = mainContext->setError(leafContext->getErrorMessage());
--mainContext->numFrameRequests;
} else if (hasLeafContext && leafContext->returnedFrame) {
if (--mainContext->numFrameRequests > 0)
ar = arFrameReady;
else
ar = arAllFramesReady;
mainContext->availableFrames.insert(std::make_pair(NodeOutputKey(leafContext->clip, leafContext->n, leafContext->index), leafContext->returnedFrame));
mainContext->lastCompletedN = leafContext->n;
mainContext->lastCompletedNode = leafContext->node;
}
assert(mainContext->numFrameRequests >= 0);
bool hasExistingRequests = !!mainContext->numFrameRequests;
/////////////////////////////////////////////////////////////////////////////////////////////
// Do the actual processing
lock.unlock();
VSFrameContext externalFrameCtx(mainContextRef);
assert(ar == arError || !mainContext->hasError());
PVideoFrame f;
if (!skipCall)
f = clip->getFrameInternal(mainContext->n, ar, externalFrameCtx);
ranTask = true;
bool frameProcessingDone = f || mainContext->hasError();
if (mainContext->hasError() && f)
vsFatal("A frame was returned by %s but an error was also set, this is not allowed", clip->name.c_str());
/////////////////////////////////////////////////////////////////////////////////////////////
// Unlock so the next job can run on the context
if (filterMode == fmUnordered) {
clip->serialMutex.unlock();
} else if (filterMode == fmSerial) {
if (frameProcessingDone)
clip->serialFrame = -1;
clip->serialMutex.unlock();
} else if (filterMode == fmParallel) {
std::lock_guard<std::mutex> lock(clip->concurrentFramesMutex);
clip->concurrentFrames.erase(mainContext->n);
} else if (filterMode == fmParallelRequests) {
std::lock_guard<std::mutex> lock(clip->concurrentFramesMutex);
clip->concurrentFrames.erase(mainContext->n);
if (parallelRequestsNeedsUnlock)
clip->serialMutex.unlock();
}
/////////////////////////////////////////////////////////////////////////////////////////////
// Handle frames that were requested
bool requestedFrames = !externalFrameCtx.reqList.empty() && !frameProcessingDone;
lock.lock();
if (requestedFrames) {
for (auto &reqIter : externalFrameCtx.reqList)
owner->startInternal(reqIter);
externalFrameCtx.reqList.clear();
}
if (frameProcessingDone)
owner->allContexts.erase(NodeOutputKey(mainContext->clip, mainContext->n, mainContext->index));
/////////////////////////////////////////////////////////////////////////////////////////////
// Propagate status to other linked contexts
// CHANGES mainContextRef!!!
if (mainContext->hasError() && !hasExistingRequests && !requestedFrames) {
PFrameContext n;
do {
n = mainContextRef->notificationChain;
if (n) {
mainContextRef->notificationChain.reset();
n->setError(mainContextRef->getErrorMessage());
}
if (mainContextRef->upstreamContext) {
owner->startInternal(mainContextRef);
}
if (mainContextRef->frameDone) {
owner->returnFrame(mainContextRef, mainContextRef->getErrorMessage());
}
} while ((mainContextRef = n));
} else if (f) {
if (hasExistingRequests || requestedFrames)
vsFatal("A frame was returned at the end of processing by %s but there are still outstanding requests", clip->name.c_str());
PFrameContext n;
do {
n = mainContextRef->notificationChain;
if (n)
mainContextRef->notificationChain.reset();
if (mainContextRef->upstreamContext) {
mainContextRef->returnedFrame = f;
owner->startInternal(mainContextRef);
}
if (mainContextRef->frameDone)
owner->returnFrame(mainContextRef, f);
} while ((mainContextRef = n));
} else if (hasExistingRequests || requestedFrames) {
// already scheduled, do nothing
} else {
vsFatal("No frame returned at the end of processing by %s", clip->name.c_str());
}
break;
}
if (!ranTask || owner->activeThreadCount() > owner->threadCount()) {
--owner->activeThreads;
if (stop) {
lock.unlock();
break;
}
++owner->idleThreads;
owner->newWork.wait(lock);
--owner->idleThreads;
++owner->activeThreads;
}
}
}
