LV2: Add more plugins

This adds the following plugins:

- Baxandall
- Beam
- Biquad
- Biquad2
- BiquadOneHalf

Had to manually fix the `Type` param in the Biquad* plugins, since the
script isn't able to pick up enumeration values. Apart from that the
script took care of everything.

1 files changed, 40 insertions, 0 deletions

diff --git a/plugins/LV2/src/Biquad/Biquad.h b/plugins/LV2/src/Biquad/Biquad.h
new file mode 100644
index 0000000..adaa121
--- /dev/null
+++ b/plugins/LV2/src/Biquad/Biquad.h
@@ -0,0 +1,40 @@
+#ifndef __Biquad_H
+#define __Biquad_H
+
+#include <lv2plugin.h>
+
+class Biquad : public LV2Plugin<4> {
+public:
+    Biquad(double rate);
+
+    void activate();
+    void run(uint32_t num_samples);
+
+    static constexpr const char * URI = "https://www.airwindows.com/biquad";
+
+private:
+    /*
+     * These are the original DSP functions from the VST plugin.
+     * They need to be called from the LV2 plugins `run` function.
+     */
+    void processReplacing(float **in, float **out, VstInt32 samples);
+    void processDoubleReplacing(double **in, double **out, VstInt32 samples);
+
+    /*
+     * Members needed by the processing functions.
+     */
+        
+	long double biquad[11]; //note that this stereo form doesn't require L and R forms!
+	//This is because so much of it is coefficients etc. that are the same on both channels.
+	//So the stored samples are in 7-8 and 9-10, and freq/res/coefficients serve both.
+	
+	uint32_t fpd;
+	//default stuff
+
+    float A;
+    float B;
+    float C;
+    float D;
+};
+
+#endif