bool VideoPipelineSource::Run() {
while (!(sink_->IsExhausted() && sink_->GetQueueSize() == 0)) {
FrameSetPtr frame_set_ptr;
float timeout = 200; // 0.2 ms
if (max_fps_ > 0) {
timeout = 1.0f / max_fps_ * 1e6; // in micros.
}
if (sink_->TryFetchingFrameSet(&frame_set_ptr)) {
// Measure time difference.
boost::posix_time::ptime curr_time =
boost::posix_time::microsec_clock::local_time();
if (frame_num_ > 0) {
float micros_passed = boost::posix_time::time_period(
prev_process_time_, curr_time).length().total_microseconds();
int wait_time = timeout - micros_passed;
while (wait_time > 10) {
OnIdle();
// Update wait time.
curr_time = boost::posix_time::microsec_clock::local_time();
micros_passed = boost::posix_time::time_period(
prev_process_time_,
curr_time).length().total_microseconds();
wait_time = timeout - micros_passed;
// We only sleep a fraction of the wait time to keep OnIdle going.
if (wait_time > 100) {
boost::thread::sleep(boost::get_system_time() +
boost::posix_time::microseconds(wait_time / 5));
}
}
}
// Update processing time.
prev_process_time_ = boost::posix_time::microsec_clock::local_time();
// Pass to children.
for (auto child : children_) {
child->ProcessFrameImpl(frame_set_ptr, this);
}
++frame_num_;
} else {
OnIdle();
boost::thread::sleep(boost::get_system_time() +
boost::posix_time::microseconds(timeout / 5));
}
}
PostProcessImpl(this);
return true;
}
bool VideoUnit::Run() {
// Initial frame_set is empty.
PostProcessImpl(0);
return true;
}
