gstreamer.cc

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// gstreamer
#include "gstreamer.h"
 
// gemc
#include "gutilities.h"
 
// Implementation summary:
// Common base-class logic for format validation, buffered event publication,
// and immediate run publication. Concrete serialization remains in plugin hooks.
 
const std::vector<std::string>& GStreamer::supported_formats() {
    // Keep this list aligned with the available gstreamer_<format>_plugin factories.
    static const std::vector<std::string> formats = {"jlabsro", "root", "ascii", "csv", "json"};
    return formats;
}
 
bool GStreamer::is_valid_format(const std::string& format) {
    const auto& supported = GStreamer::supported_formats();
    const auto  f         = gutilities::convertToLowercase(format);
    return std::find(supported.begin(), supported.end(), f) != supported.end();
}
 
 
// pragma todo: pass someting like map<string, bitset> to each detector to decide which data to publish
void GStreamer::publishEventData(const std::shared_ptr<GEventDataCollection>& event_data) {
    // The event collection and its header are required for any plugin to publish
    // a meaningful event record.
    if (!event_data) { log->error(ERR_PUBLISH_ERROR, "event data is null in GStreamer::publishEventData"); }
    if (!event_data->getHeader()) {
        log->error(ERR_PUBLISH_ERROR, "event header is null in GStreamer::publishEventData");
    }
 
    // Retain ownership of the event until the buffer is flushed. This guarantees
    // that raw pointers extracted later from hit collections remain valid.
    eventBuffer.emplace_back(event_data);
 
    // Once the configured threshold is reached, publish all buffered events in one pass.
    if (eventBuffer.size() >= bufferFlushLimit) { flushEventBuffer(); }
}
 
 
// Implementation summary:
// Run data are published immediately instead of being buffered. The publish order
// mirrors the base-class run sequence: start, header, detector banks, end.
void GStreamer::publishRunData(const std::shared_ptr<GRunDataCollection>& run_data) {
    log->info(2, "GStreamer::publishRunData->startRun: ",
              gutilities::success_or_fail(startRun(run_data)));
 
    log->info(2, SFUNCTION_NAME, "->publishRunHeader -> ",
          gutilities::success_or_fail(publishRunHeader(run_data->getHeader())));
 
    // Iterate over each detector collection and expose it to the plugin as a
    // vector of raw pointers. The owning run collection remains alive throughout
    // this method call.
    for (const auto& [sdname, gDataCollection] : run_data->getDataCollectionMap()) {
        const GDataCollection* tdptr = gDataCollection.get();
 
        // Extract digitized hits into a flat raw-pointer view expected by the hooks.
        std::vector<const GDigitizedData*> digitizedPtrs;
        digitizedPtrs.reserve(tdptr->getDigitizedData().size());
 
        for (const auto& hit : tdptr->getDigitizedData()) { digitizedPtrs.push_back(hit.get()); }
 
        log->info(2, SFUNCTION_NAME, "->publishEventDigitizedData for detector -> ", sdname,
                  gutilities::success_or_fail(publishRunDigitizedData(sdname, digitizedPtrs)));
    }
 
    log->info(2, "GStreamer::endEvent -> ",
              gutilities::success_or_fail(endRun(run_data)));
}
 
 
void GStreamer::flushEventBuffer() {
    log->info(2, "GStreamer::flushEventBuffer -> flushing ", eventBuffer.size(), " events to file");
 
    // Each buffered event is treated as read-only while the plugin hooks serialize it.
    // The buffer's shared_ptr ownership keeps all event-owned hit objects alive during the flush.
    for (const auto& eventData : eventBuffer) {
        log->info(2, SFUNCTION_NAME, "->startEvent: ",
                  gutilities::success_or_fail(startEvent(eventData)));
 
        log->info(2, SFUNCTION_NAME, "->publishEventHeader -> ",
                  gutilities::success_or_fail(publishEventHeader(eventData->getHeader())));
 
        log->info(2, SFUNCTION_NAME, "->publishEventGeneratedParticles -> generated: ",
                  gutilities::success_or_fail(publishEventGeneratedParticles("generated",
                                                                             eventData->getGeneratedParticles())));
        log->info(2, SFUNCTION_NAME, "->publishEventGeneratedParticles -> generated_tracked: ",
                  gutilities::success_or_fail(publishEventGeneratedParticles("generated_tracked",
                                                                             eventData->getGeneratedTrackedParticles())));
 
        // Publish one detector collection at a time.
        for (const auto& [sdname, gDataCollection] : eventData->getDataCollectionMap()) {
            const GDataCollection* tdptr = gDataCollection.get();
 
            // Convert ownership-bearing containers into temporary raw-pointer views.
            // Plugins consume these views immediately and do not own the pointed data.
            std::vector<const GTrueInfoData*>  trueInfoPtrs;
            std::vector<const GDigitizedData*> digitizedPtrs;
            trueInfoPtrs.reserve(tdptr->getTrueInfoData().size());
            digitizedPtrs.reserve(tdptr->getDigitizedData().size());
 
            for (const auto& hit : tdptr->getTrueInfoData()) { trueInfoPtrs.push_back(hit.get()); }
            for (const auto& hit : tdptr->getDigitizedData()) { digitizedPtrs.push_back(hit.get()); }
 
            log->info(2, SFUNCTION_NAME, "->publishEventTrueInfoData for detector -> ", sdname,
                      gutilities::success_or_fail(publishEventTrueInfoData(sdname, trueInfoPtrs)));
 
            log->info(2, SFUNCTION_NAME, "->publishEventDigitizedData for detector -> ", sdname,
                      gutilities::success_or_fail(publishEventDigitizedData(sdname, digitizedPtrs)));
        }
 
        log->info(2, "GStreamer::endEvent -> ", gutilities::success_or_fail(endEvent(eventData)));
    }
 
    // All buffered events have now been handed to the plugin hooks.
    eventBuffer.clear();
}
 
// stream an individual frame
// void GStreamer::publishFrameRunData(const std::shared_ptr<GFrameDataCollection>& frameRunData) {
// TODO: add more infor like frame number or number of entries in paylod
 
// log->info(2, "GStreamer::publishFrameRunData:  ",
//  gutilities::success_or_fail(startStream(frameRunData)));
// log->info(2, "GStreamer::publishFrameHeader:  ",
//  gutilities::success_or_fail(publishFrameHeader(frameRunData->getHeader())));
// log->info(2, "GStreamer::publishPayload:  ",
//  gutilities::success_or_fail(publishPayload(frameRunData->getIntegralPayload())));
// log->info(2, "GStreamer::endStream:  ",
//  gutilities::success_or_fail(endStream(frameRunData)));
// }