GUI: sample improvements

- resample change C-4 note
- add duplicate option

src/engine/sample.cpp

@@ -323,6 +323,7 @@ bool DivSample::insert(unsigned int pos, unsigned int length) {
 
 #define RESAMPLE_END \
   if (loopStart>=0) loopStart=(double)loopStart*(r/(double)rate); \
+  centerRate=(int)((double)centerRate*(r/(double)rate)); \
   rate=r; \
   samples=finalCount; \
   if (depth==16) { \

src/gui/dataList.cpp

@@ -290,6 +290,10 @@ void FurnaceGUI::drawSampleList() {
       doAction(GUI_ACTION_SAMPLE_LIST_ADD);
     }
     ImGui::SameLine();
+    if (ImGui::Button(ICON_FA_FILES_O "##SampleClone")) {
+      doAction(GUI_ACTION_SAMPLE_LIST_DUPLICATE);
+    }
+    ImGui::SameLine();
     if (ImGui::Button(ICON_FA_FOLDER_OPEN "##SampleLoad")) {
       doAction(GUI_ACTION_SAMPLE_LIST_OPEN);
     }

src/gui/doAction.cpp

@@ -567,6 +567,29 @@ void FurnaceGUI::doAction(int what) {
       curSample=e->addSample();
       MARK_MODIFIED;
       break;
+    case GUI_ACTION_SAMPLE_LIST_DUPLICATE:
+      if (curSample>=0 && curSample<(int)e->song.sample.size()) {
+        DivSample* prevSample=e->getSample(curSample);
+        curSample=e->addSample();
+        e->lockEngine([this,prevSample]() {
+          DivSample* sample=e->getSample(curSample);
+          if (sample!=NULL) {
+            sample->rate=prevSample->rate;
+            sample->centerRate=prevSample->centerRate;
+            sample->name=prevSample->name;
+            sample->loopStart=prevSample->loopStart;
+            sample->depth=prevSample->depth;
+            if (sample->init(prevSample->samples)) {
+              if (prevSample->getCurBuf()!=NULL) {
+                memcpy(sample->getCurBuf(),prevSample->getCurBuf(),prevSample->getCurBufLen());
+              }
+            }
+          }
+          e->renderSamples();
+        });
+        MARK_MODIFIED;
+      }
+      break;
     case GUI_ACTION_SAMPLE_LIST_OPEN:
       openFileDialog(GUI_FILE_SAMPLE_OPEN);
       break;

src/gui/sampleEdit.cpp

@@ -29,11 +29,9 @@
 #include "util.h"
 
 // TODO:
-// - resample should change C-4 note
 // - clicking on waveform should give this window focus
 // - add "create instrument using this sample" option
 // - .dmc loading
-// - duplicate sample
 void FurnaceGUI::drawSampleEdit() {
   if (nextWindow==GUI_WINDOW_SAMPLE_EDIT) {
     sampleEditOpen=true;