publishPayload.cc

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// gstreamer
#include "gstreamerJSONFactory.h"
#include "gstreamerConventions.h"
 
// Implementation summary:
// Append the frame payload block to the JSON object currently being assembled.
 
bool GstreamerJsonFactory::publishPayloadImpl(const std::vector<GIntegralPayload*>* payload) {
    if (!is_building_frame) {
        log->error(
            gstreamer::ERR_PUBLISH_ERROR,
            "publishPayloadImpl called without an active frame in GstreamerJsonFactory");
        return false;
    }
    if (!payload) {
        log->error(gstreamer::ERR_PUBLISH_ERROR, "payload is null in GstreamerJsonFactory::publishPayloadImpl");
        return false;
    }
 
    // Separate the payload block from the header block if both are present.
    if (current_frame_has_header) current_frame << ", ";
 
    current_frame << "\"payload\": [";
 
    bool wrote_first = false;
    for (const auto* pl : *payload) {
        if (!pl) continue;
 
        if (wrote_first) current_frame << ", ";
        wrote_first = true;
 
        // Each payload object is written as one JSON array of integers.
        current_frame << "[";
        const auto vec = pl->getPayload();
 
        for (size_t i = 0; i < vec.size(); i++) {
            current_frame << vec[i];
            if (i + 1 < vec.size()) current_frame << ", ";
        }
        current_frame << "]";
    }
 
    current_frame << "]";
 
    current_frame_has_payload = true;
    return true;
}