satdump/src-core/common/widgets/snr_plot.cpp

#include "snr_plot.h"
#include "core/style.h"
#include "themed_widgets.h"
#include <array>
#include <cstring>

namespace satdump
{
    namespace widgets
    {
        void SNRPlotViewer::draw(float snr, float peak_snr)
        {
            ImGui::Text("SNR (dB) : ");
            ImGui::SameLine();
            ImGui::TextColored(snr > 2 ? snr > 10 ? style::theme.green : style::theme.orange : style::theme.red, "%0.3f", snr);

            ImGui::Text("Peak SNR (dB) : ");
            ImGui::SameLine();
            ImGui::TextColored(peak_snr > 2 ? peak_snr > 10 ? style::theme.green : style::theme.orange : style::theme.red, "%0.3f", peak_snr);

            std::memmove(&snr_history[0], &snr_history[1], (200 - 1) * sizeof(float));
            snr_history[200 - 1] = snr;

            // Average of the snr_history
            float avg_snr = 0.0f;
            for (int i = 0; i < 200; i++)
            {
                if (snr_history[i] >= 0 && snr_history[i] <= peak_snr)
                {
                    avg_snr += snr_history[i];
                }
            }
            avg_snr = avg_snr / 200;

            ImGui::Text("Avg SNR (dB) : ");
            ImGui::SameLine();
            ImGui::TextColored(avg_snr > 2 ? avg_snr > 10 ? style::theme.green : style::theme.orange : style::theme.red, "%0.3f", avg_snr);

            widgets::ThemedPlotLines(style::theme.plot_bg.Value, "##snrplot", snr_history, IM_ARRAYSIZE(snr_history), 0, "", 0.0f, 25.0f, ImVec2(200 * ui_scale, 50 * ui_scale));
        }
    } // namespace widgets
} // namespace satdump