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Dynamic frame delay based on maxClientFrameRate in IPVideoRoute #47

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Dynamic frame delay based on maxClientFrameRate in IPVideoRoute #47

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1026f20
dynamic frame delay depending on client max frame rate
noio Aug 31, 2017
e504319
remove unnecessary edits
noio Aug 31, 2017
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18 changes: 12 additions & 6 deletions libs/ofxHTTP/src/IPVideoRoute.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -358,7 +358,8 @@ void IPVideoRoute::removeConnection(IPVideoConnection* handler)

IPVideoConnection::IPVideoConnection(IPVideoRoute& route):
BaseRouteHandler_<IPVideoRoute>(route),
IPVideoFrameQueue(route.settings().getMaxClientQueueSize())
IPVideoFrameQueue(route.settings().getMaxClientQueueSize()),
_targetFrameDuration(1000 / route.settings().getMaxClientFrameRate())
{
}

Expand Down Expand Up @@ -495,10 +496,13 @@ void IPVideoConnection::handleRequest(ServerEventArgs& evt)

while (_isRunning)
{
uint64_t frameSendStart = ofGetElapsedTimeMillis();

if (outputStream.good() && !outputStream.fail() && !outputStream.bad())
{
if (!empty())
{
_nextScheduledFrame = frameSendStart + _targetFrameDuration;
std::shared_ptr<IPVideoFrame> frame = pop();

if (frame != nullptr)
Expand All @@ -514,10 +518,8 @@ void IPVideoConnection::handleRequest(ServerEventArgs& evt)
ostr << "\r\n";
ostr << buffer;

uint64_t now = ofGetElapsedTimeMillis();
_lastFrameDuration = now - _lastFrameSent;
_lastFrameSent = now;
_bytesSent += static_cast<uint64_t>(ostr.chars()); // add the counts
_framesSent ++;
ostr.reset(); // reset the counts
ostr.flush();
}
Expand All @@ -529,14 +531,18 @@ void IPVideoConnection::handleRequest(ServerEventArgs& evt)
else
{
// ofLogVerbose("IPVideoRouteHandler::handleRequest") << "Queue empty.";
// Delay a little bit to wait for a next frame to come into the queue.
_nextScheduledFrame = frameSendStart + 10;
}
}
else
{
throw Poco::Exception("Response stream failed or went bad -- it was probably interrupted.");
}

Poco::Thread::sleep(30); // TODO: smarter ways of doing for rate / fps limiting
uint64_t now = ofGetElapsedTimeMillis();
if (now < _nextScheduledFrame) {
Poco::Thread::sleep(_nextScheduledFrame - now);
}
}
}
catch (const Poco::Exception& e)
Expand Down