NeuralAmpModelerPlugin

commit 8df0f4632e97213b73931789ebabbbaa58280b9c
parent 4c29ffa4e404c2e1b5c80ba0fcdd6e198353debe
Author: Steven Atkinson <steven@atkinson.mn>
Date:   Sun, 30 Apr 2023 20:06:33 -0700

Support stereo inputs via summing (#166)

* Update config.h

Support stereo input

* Sum inputs
Diffstat:
M
NeuralAmpModeler/NeuralAmpModeler.cpp
 | 
24
++++++++++++++----------
M
NeuralAmpModeler/config.h
 | 
2
+-

2 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/NeuralAmpModeler/NeuralAmpModeler.cpp b/NeuralAmpModeler/NeuralAmpModeler.cpp
@@ -863,18 +863,22 @@ void NeuralAmpModeler::_PrepareIOPointers(const size_t numChannels)
 void NeuralAmpModeler::_ProcessInput(iplug::sample** inputs, const size_t nFrames, const size_t nChansIn,
                                      const size_t nChansOut)
 {
+  // We'll assume that the main processing is mono for now. We'll handle dual amps later.
+  // See also: this->mNUM_INTERNAL_CHANNELS
+  if (nChansOut != 1) {        
+    std::stringstream ss;
+    ss << "Expected mono output, but " << nChansOut << " output channels are requested!";
+    throw std::runtime_error(ss.str());
+  }
+      
   // Assume _PrepareBuffers() was already called
   const double gain = pow(10.0, GetParam(kInputLevel)->Value() / 20.0);
-  if (nChansOut <= nChansIn) // Many->few: Drop additional channels
-    for (size_t c = 0; c < nChansOut; c++)
-      for (size_t s = 0; s < nFrames; s++)
-        this->mInputArray[c][s] = gain * inputs[c][s];
-  else
-  {
-    // Something is wrong--this is a mono plugin. How could there be fewer
-    // incoming channels?
-    throw std::runtime_error("Unexpected input processing--sees fewer than 1 incoming channel?");
-  }
+  for (size_t c = 0; c < nChansIn; c++)
+    for (size_t s = 0; s < nFrames; s++)
+      if (c == 0)
+        this->mInputArray[0][s] = gain * inputs[c][s];
+      else
+        this->mInputArray[0][s] += gain * inputs[c][s];
 }
 
 void NeuralAmpModeler::_ProcessOutput(iplug::sample** inputs, iplug::sample** outputs, const size_t nFrames,
diff --git a/NeuralAmpModeler/config.h b/NeuralAmpModeler/config.h
@@ -14,7 +14,7 @@
 
 #define SHARED_RESOURCES_SUBPATH "NeuralAmpModeler"
 
-#define PLUG_CHANNEL_IO "1-1 1-2"
+#define PLUG_CHANNEL_IO "1-1 1-2 2-2"
 
 #define PLUG_LATENCY 0
 #define PLUG_TYPE 0