finished audio effects support in audio renderer

Working structure implemented in previous commit into the audio renderer is
complete in this commit.

app/node/audio/pan/pan.cpp

@@ -39,19 +39,19 @@ QString PanNode::Description() const
   return tr("Adjust the stereo panning of an audio source.");
 }
 
-bool PanNode::ProcessesSamples() const
+NodeInput *PanNode::ProcessesSamplesFrom() const
 {
-  return true;
+  return samples_input_;
 }
 
-void PanNode::ProcessSamples(const NodeValueDatabase &values, const AudioRenderingParams &params, const float *input, float *output, int index) const
+void PanNode::ProcessSamples(const NodeValueDatabase *values, const AudioRenderingParams &params, const float *input, float *output, int index) const
 {
   if (params.channel_count() != 2) {
     // This node currently only works for stereo audio
     return;
   }
 
-  float pan_val = values[panning_input_].Get(NodeParam::kFloat).toFloat();
+  float pan_val = (*values)[panning_input_].Get(NodeParam::kFloat).toFloat();
 
   if (index%2 == 0) {
     // Sample is left channel
@@ -65,3 +65,9 @@ void PanNode::ProcessSamples(const NodeValueDatabase &values, const AudioRenderi
     }
   }
 }
+
+void PanNode::Retranslate()
+{
+  samples_input_->set_name(tr("Samples"));
+  panning_input_->set_name(tr("Pan"));
+}

app/node/audio/pan/pan.h

@@ -15,8 +15,10 @@ public:
   virtual QString Category() const override;
   virtual QString Description() const override;
 
-  virtual bool ProcessesSamples() const override;
-  virtual void ProcessSamples(const NodeValueDatabase& values, const AudioRenderingParams& params, const float* input, float* output, int index) const override;
+  virtual NodeInput* ProcessesSamplesFrom() const override;
+  virtual void ProcessSamples(const NodeValueDatabase* values, const AudioRenderingParams& params, const float* input, float* output, int index) const override;
+
+  virtual void Retranslate() override;
 
 private:
   NodeInput* samples_input_;

app/node/audio/volume/volume.cpp

@@ -39,14 +39,25 @@ QString VolumeNode::Description() const
   return tr("Adjusts the volume of an audio source.");
 }
 
-bool VolumeNode::ProcessesSamples() const
+NodeInput *VolumeNode::ProcessesSamplesFrom() const
 {
-  return true;
+  return samples_input_;
 }
 
-void VolumeNode::ProcessSamples(const NodeValueDatabase& values, const AudioRenderingParams& params, const float* input, float* output, int index) const
+void VolumeNode::ProcessSamples(const NodeValueDatabase *values, const AudioRenderingParams& params, const float* input, float* output, int index) const
 {
-  float volume_val = values[volume_input_].Get(NodeParam::kFloat).toFloat();
+  float volume_val = (*values)[volume_input_].Get(NodeParam::kFloat).toFloat();
 
   output[index] = input[index] * volume_val;
 }
+
+void VolumeNode::Retranslate()
+{
+  samples_input_->set_name(tr("Samples"));
+  volume_input_->set_name(tr("Volume"));
+}
+
+NodeInput *VolumeNode::samples_input() const
+{
+  return samples_input_;
+}

app/node/audio/volume/volume.h

@@ -15,8 +15,12 @@ public:
   virtual QString Category() const override;
   virtual QString Description() const override;
 
-  virtual bool ProcessesSamples() const override;
-  virtual void ProcessSamples(const NodeValueDatabase& values, const AudioRenderingParams& params, const float* input, float* output, int index) const override;
+  virtual NodeInput* ProcessesSamplesFrom() const override;
+  virtual void ProcessSamples(const NodeValueDatabase* values, const AudioRenderingParams& params, const float* input, float* output, int index) const override;
+
+  virtual void Retranslate() override;
+
+  NodeInput* samples_input() const;
 
 private:
   NodeInput* samples_input_;

app/node/node.cpp

@@ -390,12 +390,12 @@ NodeInput *Node::AcceleratedCodeIterativeInput() const
   return nullptr;
 }
 
-bool Node::ProcessesSamples() const
+NodeInput* Node::ProcessesSamplesFrom() const
 {
-  return false;
+  return nullptr;
 }
 
-void Node::ProcessSamples(const NodeValueDatabase &values, const AudioRenderingParams &params, const float *input, float *output, int index) const
+void Node::ProcessSamples(const NodeValueDatabase *values, const AudioRenderingParams &params, const float *input, float *output, int index) const
 {
   Q_UNUSED(values)
   Q_UNUSED(params)

app/node/node.h

@@ -160,12 +160,12 @@ public:
   /**
    * @brief Return whether this node processes samples or not
    */
-  virtual bool ProcessesSamples() const;
+  virtual NodeInput* ProcessesSamplesFrom() const;
 
   /**
    * @brief If ProcessesSamples() is true, this is the function that will process them.
    */
-  virtual void ProcessSamples(const NodeValueDatabase& values, const AudioRenderingParams& params, const float* input, float* output, int index) const;
+  virtual void ProcessSamples(const NodeValueDatabase *values, const AudioRenderingParams& params, const float* input, float* output, int index) const;
 
   /**
    * @brief Returns the parameter with the specified ID (or nullptr if it doesn't exist)