Method prepare_for_acquisition

src/board_controller/board.cpp:74–155

}

int Board::prepare_for_acquisition (int buffer_size, const char *streamer_params)
{
    if (buffer_size <= 0 || buffer_size > MAX_CAPTURE_SAMPLES)
    {
        safe_logger (spdlog::level::err, "invalid array size");
        return (int)BrainFlowExitCodes::INVALID_BUFFER_SIZE_ERROR;
    }

    for (auto it = dbs.begin (), next_it = it; it != dbs.end (); it = next_it)
    {
        ++next_it;
        delete it->second;
        dbs.erase (it);
    }
    for (auto it = marker_queues.begin (), next_it = it; it != marker_queues.end (); it = next_it)
    {
        ++next_it;
        it->second.clear ();
        marker_queues.erase (it);
    }
    int res = (int)BrainFlowExitCodes::STATUS_OK;

    std::vector<std::string> required_fields {
        "num_rows", "timestamp_channel", "name", "marker_channel"};
    std::vector<std::string> supported_presets {"ancillary", "auxiliary", "default"};
    for (std::string field : required_fields)
    {
        for (auto &el : board_descr.items ())
        {
            json board_preset = el.value ();
            std::string key = el.key ();
            if (std::find (supported_presets.begin (), supported_presets.end (), key) ==
                supported_presets.end ())
            {
                safe_logger (spdlog::level::err, "Preset {} is not supported", key);
                return (int)BrainFlowExitCodes::GENERAL_ERROR;
            }

            if (board_preset.find (field) == board_preset.end ())
            {
                safe_logger (spdlog::level::err,
                    "Field {} is not found in brainflow_boards.h for id {}", field, board_id);
                return (int)BrainFlowExitCodes::GENERAL_ERROR;
            }
        }
    }

    if ((streamer_params != NULL) && (streamer_params[0] != '\0'))
    {
        res = add_streamer (streamer_params, (int)BrainFlowPresets::DEFAULT_PRESET);
    }

    if (res == (int)BrainFlowExitCodes::STATUS_OK)
    {
        for (auto &el : board_descr.items ())
        {
            json board_preset = el.value ();
            DataBuffer *db = new DataBuffer ((int)board_preset["num_rows"], buffer_size);