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This software package contains libraries and programs that should make=20

it easier to write LV2 plugins and GUIs.
Download it: http://ll-plugins.nongnu.org/hacking.html

Read documentation: http://ll-plugins.nongnu.org/dox/lv2-c++-tools/

Or read a nice tutorial: http://ll-plugins.nongnu.org/lv2pftci/
To build and install, run
 ./configure

 make

 su -c 'make install'
You can pass some options to configure, e.g. --prefix=3D/usr to install

everything in /usr (the default is /usr/local).
This is a development tool, but I'm sending it to the LAU list as well

in case there are any not-yet-hackers who would like to start writing

effects or synths. It's easy, I promise. Here's the code you would need

to write for a simple gain effect:
 #include

 #include "gain.peg"

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 class Gain : public LV2::Plugin {

 public:

   Gain(double rate) : LV2::Plugin(p_n_ports) { }

   void run(uint32_t nframes) {

     for (uint32_t i =3D 0; i < nframes; ++i)

       p(p_out)[i] =3D p(p_gain) * p(p_in);

   }

 };

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 static int _ =3D Gain::register_class("http://my.plugin/");
And here's the code you would need for a GUI for a synth plugin with a

button that sends a test tone:
 #include

 #include "mysynth.peg"

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 class MySynthGUI : public LV2::GUI > {

 public:

   MySynthGUI(const std::string& URI) : m_button("Click me!") {

     m_button.signal_pressed().connect(mem_fun(*this, &MySynthGUI::send_not=

e_on));

     m_button.signal_released().connect(mem_fun(*this, &MySynthGUI::send_no=

te_off));

     pack_start(m_button);

   }

 protected:

   void send_note_on() {

     uint8_t event[] =3D { 0x90, 0x40, 0x40 };

     write_midi(p_midi, 3, event);

   }

   void send_note_off() {

     uint8_t event[] =3D { 0x80, 0x40, 0x40 };

     write_midi(p_midi, 3, event);

   }

   Gtk::Button m_button;

 };

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 static int _ =3D MySynthGUI::register_class("http://my.gui/");
See? Trivial. Read more in the tutorial linked above.
--ll
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