V4LCamera::V4LCamera() {
/// Configuration Engine Instance and signals connection
_configEngine = new V4LConfigurationEngine();
/// Cleaning frame format;
CLEAR(_fmt);
/// Cleaning Capture Device Name and File Descriptor
_deviceName = "";
_fd = -1;
/// Buffer select() Timeout Init
_tv.tv_sec = 2;
_tv.tv_usec = 0;
/// V4L Buffer Type init
_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
_rgb->setChecked(true);
_rgb->setText("Native Image Format (RGB)");
settingsDialogRequest = false;
connect(_settingsAction, SIGNAL(triggered()), _configEngine, SLOT(configRequest()));
connect(_configEngine, SIGNAL(availableConfiguration()), this, SLOT(configure()));
configure();
}
void V4LConfigurationEngine::frameSizeChangeRequest(QString sReq) {
#ifdef _DEBUG_CONFIGURATION_OBJECTS
qWarning() << "[V4L_CONFIGURATION_ENGINE] - frameSizeChangeRequest() - set " << sReq << " frame size";
#endif //_DEBUG_CONFIGURATION_OBJECTS
QStringList sConfig;
sConfig += _deviceName;
sConfig += sReq;
configRequest(sConfig);
}
/**
* The core config write functionality.
*
* Config writes run in two passes - the first is a quick check to ensure the config servers
* are all reachable, the second runs the actual write.
*
* TODO: Upgrade and move this logic to the config servers, a state machine implementation
* is probably the next step.
*/
void ConfigCoordinator::executeBatch( const BatchedCommandRequest& clientRequest,
BatchedCommandResponse* clientResponse,
bool fsyncCheck ) {
NamespaceString nss( clientRequest.getNS() );
dassert( nss.db() == "config" || nss.db() == "admin" );
dassert( clientRequest.sizeWriteOps() == 1u );
if ( fsyncCheck ) {
//
// Sanity check that all configs are still reachable using fsync, preserving legacy
// behavior
//
OwnedPointerVector<ConfigFsyncResponse> fsyncResponsesOwned;
vector<ConfigFsyncResponse*>& fsyncResponses = fsyncResponsesOwned.mutableVector();
//
// Send side
//
for ( vector<ConnectionString>::iterator it = _configHosts.begin();
it != _configHosts.end(); ++it ) {
ConnectionString& configHost = *it;
FsyncRequest fsyncRequest;
_dispatcher->addCommand( configHost, "admin", fsyncRequest );
}
_dispatcher->sendAll();
//
// Recv side
//
bool fsyncError = false;
while ( _dispatcher->numPending() > 0 ) {
fsyncResponses.push_back( new ConfigFsyncResponse() );
ConfigFsyncResponse& fsyncResponse = *fsyncResponses.back();
Status dispatchStatus = _dispatcher->recvAny( &fsyncResponse.configHost,
&fsyncResponse.response );
// We've got to recv everything, no matter what
if ( !dispatchStatus.isOK() ) {
fsyncError = true;
buildFsyncErrorFrom( dispatchStatus, &fsyncResponse.response );
}
else if ( !fsyncResponse.response.getOk() ) {
fsyncError = true;
}
}
if ( fsyncError ) {
combineFsyncErrors( fsyncResponses, clientResponse );
return;
}
else {
fsyncResponsesOwned.clear();
}
}
//
// Do the actual writes
//
BatchedCommandRequest configRequest( clientRequest.getBatchType() );
clientRequest.cloneTo( &configRequest );
configRequest.setNS( nss.coll() );
OwnedPointerVector<ConfigResponse> responsesOwned;
vector<ConfigResponse*>& responses = responsesOwned.mutableVector();
//
// Send the actual config writes
//
// Get as many batches as we can at once
for ( vector<ConnectionString>::iterator it = _configHosts.begin();
it != _configHosts.end(); ++it ) {
ConnectionString& configHost = *it;
_dispatcher->addCommand( configHost, nss.db(), configRequest );
}
// Send them all out
_dispatcher->sendAll();
//
// Recv side
//
while ( _dispatcher->numPending() > 0 ) {
// Get the response
responses.push_back( new ConfigResponse() );
ConfigResponse& configResponse = *responses.back();
Status dispatchStatus = _dispatcher->recvAny( &configResponse.configHost,
&configResponse.response );
if ( !dispatchStatus.isOK() ) {
buildErrorFrom( dispatchStatus, &configResponse.response );
}
}
combineResponses( responses, clientResponse );
}
