block: reimplemented reversing

app/render/renderprocessor.cpp

@@ -226,7 +226,6 @@ NodeValueTable RenderProcessor::GenerateBlockTable(const Track *track, const Tim
         continue;
       }
 
-      // FIXME: Doesn't handle reversing
       double speed_value = b->GetStandardValue(Block::kSpeedInput).toDouble();
 
       if (qIsNull(speed_value)) {
@@ -237,6 +236,10 @@ NodeValueTable RenderProcessor::GenerateBlockTable(const Track *track, const Tim
         samples_from_this_block->speed(speed_value);
       }
 
+      if (b->GetStandardValue(Block::kReverseInput).toBool()) {
+        samples_from_this_block->reverse();
+      }
+
       int copy_length = qMin(max_dest_sz, samples_from_this_block->sample_count());
 
       // Copy samples into destination buffer