int AudioMixerClientData::checkBuffersBeforeFrameSend() {
QWriteLocker writeLocker { &_streamsLock };
auto it = _audioStreams.begin();
while (it != _audioStreams.end()) {
SharedStreamPointer stream = it->second;
if (stream->popFrames(1, true) > 0) {
stream->updateLastPopOutputLoudnessAndTrailingLoudness();
}
static const int INJECTOR_MAX_INACTIVE_BLOCKS = 500;
// if we don't have new data for an injected stream in the last INJECTOR_MAX_INACTIVE_BLOCKS then
// we remove the injector from our streams
if (stream->getType() == PositionalAudioStream::Injector
&& stream->getConsecutiveNotMixedCount() > INJECTOR_MAX_INACTIVE_BLOCKS) {
// this is an inactive injector, pull it from our streams
// first emit that it is finished so that the HRTF objects for this source can be cleaned up
emit injectorStreamFinished(it->second->getStreamIdentifier());
// erase the stream to drop our ref to the shared pointer and remove it
it = _audioStreams.erase(it);
} else {
++it;
}
}
return (int)_audioStreams.size();
}
