Some docs, some bitview

plugins/bitview_app/tools/diff_decode/diff_decode.cpp

@@ -0,0 +1,78 @@
+#include "diff_decode.h"
+#include "common/codings/differential/nrzm.h"
+#include "core/style.h"
+#include "imgui/imgui_stdlib.h"
+#include "logger.h"
+#include <fstream>
+
+namespace satdump
+{
+    std::string DifferentialTool::getName() { return "Differential Decoder"; }
+
+    void DifferentialTool::renderMenu(std::shared_ptr<BitContainer> &container, bool is_busy)
+    {
+        if (is_busy)
+            style::beginDisabled();
+
+        if (ImGui::RadioButton("NRZ-M", diff_mode == 0))
+            diff_mode = 0;
+        ImGui::SameLine();
+        if (ImGui::RadioButton("NRZ-S", diff_mode == 1))
+            diff_mode = 1;
+
+        if (ImGui::Button("Differential Decode"))
+            should_process = true;
+
+        if (is_busy)
+            style::endDisabled();
+    }
+
+    bool DifferentialTool::needToProcess() { return should_process; }
+
+    void DifferentialTool::setProcessed() { should_process = false; }
+
+    void DifferentialTool::process(std::shared_ptr<BitContainer> &container, float &process_progress)
+    {
+        uint8_t *ptr = container->get_ptr();
+        size_t size = container->get_ptr_size();
+
+        char name[1000];
+        tmpnam(name);
+        std::string tmpfile = name;
+        std::ofstream file_out(tmpfile, std::ios::binary);
+        diff::NRZMDiff nrzm_decoder;
+
+        uint8_t tmp_buf[8192];
+
+        size_t current_ptr = 0;
+        while (current_ptr < size)
+        {
+            size_t csize = std::min<size_t>(8192, size - current_ptr);
+
+            memcpy(tmp_buf, ptr + current_ptr, csize);
+            current_ptr += csize;
+
+            nrzm_decoder.decode(tmp_buf, csize);
+
+            if (diff_mode == 1)
+                for (int i = 0; i < csize; i++)
+                    tmp_buf[i] ^= 0xFF;
+
+            file_out.write((char *)tmp_buf, csize);
+
+            process_progress = double(current_ptr) / double(size);
+        }
+
+        file_out.close();
+
+        std::shared_ptr<satdump::BitContainer> newbitc = std::make_shared<satdump::BitContainer>(container->getName() + (diff_mode == 1 ? " NRZ-S" : " NRZ-M"), tmpfile);
+        newbitc->d_bitperiod = container->d_bitperiod;
+        newbitc->init_bitperiod();
+        newbitc->d_is_temporary = true;
+
+        if (container->bitview != nullptr)
+            ((BitViewHandler *)container->bitview)->addSubHandler(std::make_shared<BitViewHandler>(newbitc));
+        else
+            logger->error("Can't add container!");
+    }
+} // namespace satdump