Build: update CmakeLists.txt to generate python bindings

Refs: #25

.gitmodules

@@ -0,0 +1,4 @@
+[submodule "lib/pybind11"]
+	path = lib/pybind11
+	url = https://github.com/pybind/pybind11
+	branch = stable

CMakeLists.txt

@@ -3,13 +3,19 @@ project(wtpp)
 
 set(CMAKE_CXX_STANDARD 17)
 
-add_library (wave src/wave.cpp)
-add_library (wavetable src/wavetable.cpp)
-add_library (common src/common.cpp)
-add_library (generators src/generators.cpp)
+add_subdirectory(lib/pybind11)
 
 add_executable(wtpp src/wtpp.cpp)
 
+pybind11_add_module(py-wave SHARED src/wave.cpp)
+pybind11_add_module(py-wavetable SHARED src/wavetable.cpp)
+# pybind11_add_module(common SHARED src/common.cpp)
+# pybind11_add_module(generators SHARED src/generators.cpp)
+add_library(wave src/wave.cpp)
+add_library(wavetable src/wavetable.cpp)
+add_library(common src/common.cpp)
+add_library(generators src/generators.cpp)
+
 target_link_libraries(wtpp wave wavetable common generators)
 
 include(FetchContent)

lib/pybind11

@@ -0,0 +1 @@
+Subproject commit 12852cd33bdaae0fe5fecc0db39b788dbbcc7b3d

src/wtpp.cpp

@@ -1,4 +1,10 @@
 #include <iostream>
+#include "wave.h"
+#include "wavetable.h"
+
+// Initialize index at 0 for Wave and Wavetable cycles
+uint16_t Wave::m_nid = 0;
+uint16_t Wavetable::m_nid = 0;
 
 int main()
 {